subsurface investigation tender docs

7/28/2019 Subsurface Investigation Tender Docs

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Edifcio das Naes Unidas para os PALOP'S

TABLE OF CONTENTS TOC - Page 1 of 1AN10064-0100D-TOC-40A2-GE-01 REV 0

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TABLE OF CONTENTS

A. CONTRACT FORMS AND CONDITIONS

A1. TENDER CONDITIONS AND PROCEDURES

A1.1 INSTRUCTIONS TO TENDERERS

A1.2 PRICING OF TENDER DOCUMENTS

A1.3 SUBMISSION OF TENDERS

A1.4 TENDER EXAMINATION AND ACCEPTANCE

A1.5 SCHEDULES

A2. TENDER AND CONTRACT FORMS

A2.1 FORM OF TENDER

A2.2 FORM OF AGREEMENT

A2.3 FORM OF BANK GUARANTEE (TENDER SECURITY)

A2.4 FORM OF BANK GUARANTEE (PERFORMANCE SECURITY)

A3. CONDITIONS OF CONTRACT

B. SPECIFICATION

40:0 GENERAL

40:1 PARTICULAR REQUIREMENTS

40:2 BORING AND SAMPLING

40:3 IN SITU TESTING

40:4 LABORATORY TESTING

C. METHOD OF MEASUREMENT

D. BILL OF QUANTITIES

E. DRAWINGS


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A. CONTRACT FORMS AND CONDITIONS


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A1. TENDER CONDITIONS AND PROCEDURES


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INSTRUCTIONS TO TENDERERS A1.1 - Page 1 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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A1.1 INSTRUCTIONS TO TENDERERS

1001 PURPOSE OF TENDER: to obtain a favourable offer from qualified contractors for

the execution and completion, in accordance with the Tender Documents, of the

Subsurface Investigation for the purpose of the design of foundations, excavation supportsand paving works for the Regional Centre of Information of PALOP in Luanda, Angola.

1005 TENDER DOCUMENTS: provided to Tenderer are as follows:

A1- Tender Conditions and Procedures

A2- Tender and Contract Forms

A3- Conditions of Contract

B- Specification

C- Method of Measurement

D- Bill of Quantities

E- Tender Drawing(s)

Addenda, circular letters and faxes, if any, issued by the Engineer prior to the

latest date fixed for the delivery of Tenders.

1010 SETS OF TENDER DOCUMENTS: one set of Tender Documents is issued to each

Tenderer

1015 DETAILS TO BE CONFIDENTIAL: Tenderer shall treat the Tender Documents as

private and confidential (save in so far as may be necessary for the purpose hereof) and

shall not publish or disclose the same or any particulars thereof in any trade or technical

paper or elsewhere. The Tender Documents shall not be used for any purpose other than

that for which they are intended.

1020 SIGN, DATE AND COMPLETE in ink, one set of the Tender Documents using

block letters. The signature must be that of a principal of the firm or a person legally

authorised for the purpose.

1025 QUERIES, AMBIGUITIES AND DISCREPANCIES in or between Tender

Documents must be referred to the Engineer by fax or in writing, not later than 3 days

before the date fixed for delivery of Tenders. Clarification by the Engineer will be

distributed to all Tenderers in the form of an addendum, circular letter, or fax.

1030 QUALIFICATION OF TENDER: the Tender is to be strictly in accordance with the

Tender Conditions and Tender Documents. Any qualification of a Tender or alteration to

the Tender Documents shall be deemed to be null and void.


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INSTRUCTIONS TO TENDERERS A1.1 - Page 2 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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The Tender must be submitted solely on the basis of the documents provided and shall be

free of any qualifications. If the Tenderer wishes to submit an alternative offer to the

Employer for consideration, such offer shall be additional to and completely separate from

this Tender and shall be submitted as a separate set of Tender Documents.

1035 SUBMITTALS: the Tenderer shall evidence his understanding, capability and

proposals for the execution and completion of the Works, and to this effect shall produce

and submit as an integral part of his Tender, the following information:

(a) Programme of Works in a bar-chart form indicating clearly : the main

activities with order of procedure, progress, duration and completion; key

dates including Commencement on Site, Interim Completion and Final

Completion, time allocated for review of reports by the Engineer, together

with a statement describing and explaining methods and strategy to be

adopted.

(b) A detailed listing of the Contractors Equipment proposed to be used in

carrying out the Works (in accordance to Schedule No. 1)

(c) A detailed listing of the key personnel proposed to be employed in

managing, supervising and carrying out the Works (in accordance to

Schedule No. 2)

1040 PARTIAL TENDER: Tender fully for the whole of the Works as described. A partialTender will not be considered.

1055 COST OF TENDER: no reimbursement whatsoever will be made for any cost,

expense or loss which may be incurred by the Tenderer in the preparation and submission

of his Tender.

1060 SITE VISIT: the Tenderer or any of his servants or agents will be granted permission

by the Employer to enter the Site for the purpose of inspection in connection with the

Tender. The Tenderer by entering the Site will be deemed to have released and

indemnified the Employer and his servants or agents from and against all liability in respect

of personal injury (whether fatal or otherwise), loss of or damage to property and any other

loss, damage, cost and expense whatsoever and howsoever caused (whether or not by the

act or neglect of the Employer) which but for the exercise of such permission would not

have arisen.

1065 PERIOD OF VALIDITY: the Tender shall remain valid and irrevocable for a period

of 60 days from the latest date fixed for delivery of Tenders.


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PRICING OF TENDER DOCUMENTS A1.2 - Page 1 of 1AN11064-0100D-CON-40A3-GE-01 REV A

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A1.2 PRICING OF TENDER DOCUMENTS

2001 UNPRICED ITEMS: costs relating to items which are not priced shall be deemed to

have been included elsewhere in the Tender.

2005 CURRENCY: All unit rates and prices shall be expressed in U.S. Dollars.

2010 ERRORS FOUND IN CHECKING TENDER PRICE: before accepting any Tender

accompanied by a Bill of Quantities, the Tenderers pricing will be checked arithmetically

and to ascertain that amounts have been correctly transferred from one part of the Tender

Documents to another. If any errors are found the difference between the Tender Price and

the corrected Tender Price, will be adjusted either by amending individual unit rates by

agreement, or by a percentage calculated upon the total amount of such errors in relation to

the Tender Price, so that the original Tender Price remains unaltered.


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SUBMISSION OF TENDERS A1.3 - Page 1 of 1AN11064-0100D-CON-40A3-GE-01 REV 0

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A1.3 SUBMISSION OF TENDERS

3001 DELIVERY OF TENDERS: validated Tender Documents are to be delivered in a

sealed envelope addressed to:

Dar Al-Handasah Consultants (Shair & Partners)

141 Av. Che Guevara,

P.O. Box: 2584

Luanda, Angola

Tel: +244 222 447 461

Fax: +244 222 449 882

E-mail: [email protected]

The envelope is to bear no marking other than as follows:

CONFIDENTIAL

DO NOT OPEN WITHOUT AUTHORITY

TENDER DOCUMENTS FOR THE SUBSURFACE INVESTIGATION

FOR THE REGIONAL CENTRE OF INFORMATION OF PALOP

Dar Al-Handasah Consultants (Shair & Partners)141 Av. Che Guevara,

P.O. Box: 2584

CONTRACT NO. {

Luanda, Angola

TO BE FILLED BY DAR LUANDA

}

3005 DISPATCH TENDER DOCUMENTS and validating data to arrive at the address

stated not later than twelve noon on the date given in the Letter of Invitation or such other

date as may be officially notified in writing under the hand of the Employer or Engineer to

all Tenderers. Tenders received after this time and date will not be considered.


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TENDER EXAMINATION AND ACCEPTANCE A1.4 - Page 1 of 1AN11064-0100D-CON-40A3-GE-01 REV 0

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A1.4 TENDER EXAMINATION AND ACCEPTANCE

4001 EXAMINATION : Tender Documents will be opened and examined by a committee

appointed by the Engineer. Prices will not be made public.

4005 CLARIFICATION BY TENDERER: a Tenderer may be required to prepare and

furnish clarification for any item in the Tender Documents. Failure to comply with such a

request may result in disqualification.

4010 ACCEPTANCE OR REJECTION: no undertaking is given or implied to accept the

lowest or any Tender and no reason will be assigned for the acceptance or rejection of any

Tender.


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SCHEDULES A1.5 - Page 1 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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A1.5 SCHEDULES

SCHEDULE No. 1

CONTRACTOR'S EQUIPMENT

-----------------------------------------------------------------------------------------------------------------------------

The Tenderer shall enter in this Schedule under appropriate headings all major items

including drilling rods, bits, split spoons, core barrel, laboratory testing equipment etc.

of Contractor's Equipment which he proposes to bring on to the Site for the execution

of the Works, or to be used in the laboratory for performance of laboratory tests in

accordance to the following form.

Calibration certificate should be provided where applicable.

(Use separate or additional sheets)

-----------------------------------------------------------------------------------------------------------------------------Description Characteristics: Quantity Estimated

(Type, Size, Capacity, Duration

Model, Make, Power Rating, etc. on Site

Year) (Days)

----------------------------------------------------------------------------------------------------------------------------

-----------------------------------------------------------------------------------------------------------------------------


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SCHEDULES A1.5 - Page 2 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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SCHEDULE No. 2

KEY PERSONNEL

-----------------------------------------------------------------------------------------------------------------------------

The Tenderer shall enter in this Schedule names and duration of the key personnel thathe proposes to employ at Head Office, Laboratory and on Site to manage, supervise

and carry out the Works. together with their qualifications, experience, positions held

and nationality.

(Use separate or additional sheets)-----------------------------------------------------------------------------------------------------------------------------

Designation Name Qualifications, Summary of Years

and and Present Experience with the

Nationality Occupation Firm

-----------------------------------------------------------------------------------------------------------------------------

Head Office

Owner/Partner/

Director in Charge

Other Key Staff

(List Below)

Laboratory

Laboratory Engineer

Laboratory Technician

Other Key Staff

(List Below)

Site Office

Site Engineer / Geologist

Driller(s)

Other Key Staff

(List Below)

-----------------------------------------------------------------------------------------------------------------------------


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A2. TENDER AND CONTRACT FORMS


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FORM OF TENDER A2.1 - Page 1 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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A2.1 FORM OF TENDER

FOR

SUBSURFACE INVESTIGATION

To: Dar Al-Handasah Consultants (Shair & Partners), Angola

1. Having examined the Site and the Tender and Contract Documents for the above-

named works, we, the undersigned, offer to execute and complete the whole of the

Works comprised by the Contract for the Tender Price of

............................................................... US

Dollars (US$ ...........) or such other sum as may become payable in

accordance with the Tender and Contract Documents.

2. We undertake, if our Tender is accepted, to commence the Works within five (5)

days after receipt of the Engineer's order to commence and to complete the Works

and submit all reports in accordance with Clause 24 of the Conditions of Contract.

3. We agree to abide by this Tender for a period of 60 days from the date hereof and it

may be accepted by you at any time before the expiry of that period.

4. We agree that any alteration to the Tender Documents or any qualification of the

Tender contained in a separate letter accompanying our Tender or otherwise, will be

deemed to be null and void unless also accompanied by an unqualified Tender.

5. We undertake, if our Tender is accepted, to enter into and execute the Form of

Agreement as and when requested so to do.

6. Unless and until an Agreement is prepared and executed, this Tender, together with

your written acceptance thereof, shall constitute a binding agreement between us.

7. We understand that you are not bound to accept the lowest nor any Tender you may

receive.

8. We unconditionally accept that no reimbursement whatsoever will be made for anycosts, expense or loss which we may have incurred in the preparation and

submission of our Tender.

9. We attach as an integral part of our Tender for approval and acceptance, the

following information:

(i) Proposed Programme of Works(ii) List of Contractors Equipment (in accordance with Schedule No. 1)(iii) List of Key Personnel (in accordance with Schedule No. 2)


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FORM OF TENDER A2.1 - Page 2 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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Signed & sealed .........................................................

In the Capacity of .......................................................

Duly authorised to sign tenders for and on behalf of:

....................................................................................

....................................................................................

Address .......................................................................

....................................................................................

Date .............................................................................


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FORM OF AGREEMENT A2.2 - Page 1 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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SPECIMEN

A2.2 FORM OF AGREEMENT

FOR


THIS AGREEMENT is made on the .................. day of ...... 2011

between Dar Al-Handasah Consultants (Shair & Partners) (hereinafter called 'the

Employer') of the one part and .................................... (hereinafter

called 'the Contractor') of the other part.

WHEREAS the Employer has accepted a Tender from the Contractor for the execution and

completion of the above-named Works, this Agreement witnesses as follows:

1. In this Agreement words and expressions shall have the same meanings as are

respectively assigned to them in the Conditions of Contract hereinafter referred to.

2. The following documents shall be deemed to form the whole of the Contract

Documents and shall be read and construed as part of this Agreement:

the Letter of Acceptance

the Tender

the Conditions of Contractthe Specification

the Methods of Measurement

the Bill of Quantities

the Drawings

3. In consideration of the payments to be made by the Employer to the Contractor, the

Contractor hereby covenants to execute and complete the Works comprised by the

Contract in strict conformity with the provisions of the Contract.

4. In consideration of the execution and completion of the Works by the Contractor,

the Employer hereby covenants to pay the Contractor the Contract Price of

..U.S.Dollars (U.S.$..),

or such other sum as may become payable in accordance with the provisions of the

Contract, at the times and in the manner prescribed by the Contract.

IN WITNESS whereof the parties hereto have signed below on the date first written above.


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FORM OF AGREEMENT A2.2 - Page 2 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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EMPLOYER

Dar Al-Handasah Consultants (Shair & Partners)

Signed ...............................................................

Name .................................................................

CONTRACTOR

Signed ..............................................................

Name ................................................................


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FORM OF BANK GUARANTEE (TENDER SECURITY) A2.3 - Page 1 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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SPECIMEN

A2.3 FORM OF BANK GUARANTEE

(TENDER SECURITY)

FOR

THE TENDER OF


WHEREAS .........................................................................................................................

(hereinafter called the Tenderer) has submitted his Tender dated ........................................

day of ...................... 2011 for the . (hereinafter called the

Tender).

BY THIS GUARANTEE we ...............................................................................................

of .................................................................................................................................

having our registered office at ..........................................................................................

.....................................................................................................................................

(hereinafter called the Bank) are bound unto .. (hereinafter

called the Employer) in the sum of ..

US Dollars (US$...) for which payment well and truly to be made to the said

Employer the Bank binds itself, its successors and assigns by these presents.

SEALED with the Common Seal of the Bank this ..................... day of ................. 2011

THE CONDITIONS of this obligation are:

(1) if the Tenderer withdraws his tender during the period of tender validity stated in

the Form of Tender; or

(2) if the Tenderer, having been notified of the acceptance of his tender by the

Employer during the period of tender validity,

a) fails or refuses to execute the Form of Agreement, or

b) fails or refuses to furnish the Performance Security,

we undertake to pay to the Employer the above amount upon receipt of his first written

demand, without the Employer having to substantiate his demand, provided that in his

demand the Employer will note that the amount claimed by him is due to him as a result of

the occurrence of one or both of the two conditions, specifying the occurred condition or


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FORM OF BANK GUARANTEE (TENDER SECURITY) A2.3 - Page 2 of 2AN11064-0100D-CON-40A3-GE-01 REV 0

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conditions.

This Guarantee will remain in force up to and including the date 60 days after the closing

date for submission of tenders or as extended by the Employer at any time prior to this

date, notice of which extension to the Bank being hereby waived, and any demand in

respect thereof should reach the Bank not later than the above date.

Signature for the Bank .........................................................................................................

In the capacity of .................................................................................................................

Signature of Witness ...........................................................................................................

Name ..................................................................................................................................

Address ...............................................................................................................................

............................................................................................................................................


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CONDITIONS OF CONTRACT A3 - Page 1 of 11AN11064-0100D-CON-40A3-GE-01REV 0

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FOR


1. DEFINITIONS

In the Contract, the following words shall have the meaning assigned to them by

this Clause:

(a) 'Employer' means: (TO BE FILLED BY DAR LUANDA)

{Name}

{Street / Building}

{PO. Box: }

{City/Capital, Country}

{Tel: }

{Fax: }

{E-mail: (if any}

(b) 'Engineer' means:

Dar Al-Handasah Consultants (Shair & Partners)141 Av. Che Guevara,

P.O. Box: 2584

Luanda, Angola

Tel: +244 222 447 461

Fax: +244 222 449 882

E-mail: [email protected]

(b) 'Contractor' means the person or firm or company whose Tender has been

accepted by the Employer.

(c) 'Sub-contractor' means any person or firm or company to whom a part of the

Works has, with the consent of the Engineer, been sub-contracted by the

Contractor.

(d) 'Contract' means the Contract Documents listed in the Form of Agreement

and such further documents as may be expressly incorporated in the Letter

of Acceptance.

(e) 'Letter of Acceptance' means the formal acceptance by the Employer of the

Contractor's Tender


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(f) Works' means the Subsurface Investigation of the Site as described in

paragraph (h) of this Clause for the proposed Regional Centre of

Information of Palop and comprising geotechnical investigation of surface

and sub-surface conditions.

(g) 'Site' means the area or areas where the Works are to be carried out. The

geographic location of the Site is close to the TPA Production Studios &

Emission Center with the plot limits as defined on the Drawings..

(h) 'Contract Price' means the amount Tender Price stated in the Contractor's

Tender, subject to such adjustment as may be necessary in accordance with

the Contract.

(i) 'Equipment' means all plant, machinery, apparatus, appliances and things of

whatsoever nature necessarily required for the proper performance,

execution and completion of the Works, whether owned, hired, or leased by

the Contractor or any Sub-contractor.

(j) 'day' means calendar day.

2. DOCUMENTS

The Contract Documents are complementary and are to be taken as mutually

explanatory of one another; what is required by any one of them shall be deemed to

be as binding as if required by all.

3. LANGUAGE OF THE CONTRACT

The language of the Contract is English. All reports, drawings and other written

matters shall be in English.

4. LAW OF THE CONTRACT

The Contract is subject to and shall be construed according to Laws of State of

Angola.

5. EXTENT OF CONTRACT

The Contract comprises the execution and completion of the Works and, except in

so far as the Contract otherwise provides, the supply of all approved professionally

skilled personnel, superintendence, labour, materials, equipment, plant and

everything whether of a temporary or permanent nature required for such execution

and completion, so far as the necessity for providing the same is specified in or

reasonably to be inferred from the Contract.


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6. CONTRACT AGREEMENT

The Contractor shall, if called upon so to do, enter into and execute a Contract

Agreement in the form annexed to these Conditions with such modification as maybe necessary.

CONTRACTOR'S GENERAL OBLIGATIONS

7. RESPONSIBILITY

The Contractor shall take full responsibility for execution and completion of the

Works in accordance with the Contract and for the adequacy, stability and safety of

all site operations and methods of working, the suitability of Equipment and

methods of sampling, testing and any other matters in connection with the Works.

8. KNOWLEDGE OF WORKS AND SITE CONDITIONS

The Contractor acknowledges and shall be deemed, prior to submitting his Tender,

to have thoroughly studied all Documents relating to the Contract, carried out an

inspection and examination of the Site and its surroundings and obtained all

information necessary to acquire a full and complete understanding, knowledge and

evaluation of the nature and scope of the Works and the provisions and prevailingconditions applicable to their performance, and have satisfied himself and made due

allowance in his Tender, as to:

(a) the category, quality and quantity of Equipment and labor that is necessarily

required to execute and complete the Works in a timely manner, including

without limitation: all technical data, local operating conditions and other

requirements concerning and applicable to the use of such Equipment.

(b) the form and nature of the Site, including without limitation: means of

access, hydrological, climatic and meteorological conditions;

(c) any statutes, orders, regulations, bye-laws or other constraints or restrictions

applicable to the Site or Works;

(d) all risks, contingencies and all other circumstances which may influence or

affect the undertaking, execution and completion of the Works.

9. WORK TO BE TO SATISFACTION OF ENGINEER


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The Contractor shall execute and complete the Works in strict accordance with the

Contract to the satisfaction of the Engineer and shall comply with and adhere

strictly to the Engineer's instructions and directions on any matter (whether

mentioned in the Contract or not) touching on or concerning the Works.

10. INSTRUCTIONS

The Contractor shall take instructions and directions from the Engineer only. The

Engineer's written decision on any question of the interpretation of the Specification

and the performance of the work shall be final and subject only to the provisions of

Clause 38, the parties shall be bound by such decisions.

11. REVISED PROGRAMME OF WORKS

If at any time it should appear to the Engineer that the Contractors actual progress

of the Works does not conform to the Programme of Works attached to his accepted

Tender, the Contractor shall produce at the request of the Engineer, a revised

Programme of Works showing such modifications as are necessary to ensure

completion of the Works within the Time for Completion.

12. CONTRACTORS EQUIPMENT

The Contractor shall not, except with the express permission and approval of the

Engineer, omit, modify, substitute or remove any item or quantity of ContractorsEquipment listed in the Schedule attached to his accepted Tender.

13. KEY PERSONNEL

The Contractor shall not, except with the express permission and approval of the

Engineer, omit, modify, substitute or remove any Key Personnel listed in the

Schedule attached to his accepted Tender.

14. STATUTORY OBLIGATIONS, FEES AND CHARGES

The Contractor shall comply with all obligations and submit all notices required by

any statute, order, regulation or bye-law applicable to the Works and shall pay all

fees and charges in respect of the Works legally payable by him.

15. EXISTING UTILITIES AND SERVICES

The Contractor is deemed to be fully acquainted with the location of all existing

utilities and services on and in the vicinity of the Site and is solely responsible for


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any interruption or damage caused to such utilities and services by his site

operations. All damage must be reported immediately to the Engineer and the

relevant Authority. The Contractor shall pay for any repair costs and associated

charges imposed by any relevant Authority for rectification of any interruption or

damage so caused.

16. CONTRACTOR'S REPRESENTATIVE

The Contractor shall at all times keep on the Site a qualified representative who is

competent to supervise the Works and to receive notices on behalf of the Contractor

and act upon the instructions from the Engineer.

17. GUARANTEE

The Contractor guarantees that the Works shall be undertaken and performed in

accordance with currently accepted geotechnical investigation practices and

standards and that all work shall be executed and completed in compliance with the

requirements thereof.

18. REMOVAL OF IMPROPER RESOURCES

The Contractor shall upon the order of the Engineer promptly remove from the Site

any unfit or unsuitable resource, including but not necessarily limited to personnel,

workmen, materials and Equipment, which in the opinion of the Engineer is not fitfor the function or purpose intended. The Contractor shall promptly replace such

resource to the approval of the Engineer and shall bear all costs incurred by such

removal and replacement.

19. RE-EXECUTION OF WORK AND REPLACEMENT OF UNFIT WORK

The Contractor shall upon the order of the Engineer promptly abandon any work

which in the opinion of the Engineer is not fit for the purpose intended. The

Contractor shall re-execute all such work as the Engineer deems necessary in

conformity with the approved mode and method of working to replace the work

which was declared unfit for its intended purpose and he shall bear all costs

incurred by such re-execution and replacement.

20. SUB-CONTRACTING

Except for engaging the services of a public or an approved commercial laboratory

the Contractor shall not sub-contract the Works or any part thereof without the prior

consent and approval of the Engineer.


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21. HEALTH AND SAFETY

Without prejudice to the Contractor's responsibility to provide for the safety and

security of the Contractor's personnel, the Contractor shall comply with all and any

health and safety regulations imposed by Authorities having jurisdiction.

The Contractor shall immediately report to the Engineer any accidents, involving

death or injury to Contractor's personnel or any other person, and any loss or

damage to the Works or Equipment or any other property.

22. PERFORMANCE SECURITY

Not Applicable

COMMENCEMENT, PROGRESS AND COMPLETION

23. COMMENCEMENT OF WORKS

The Contractor shall commence the Works on Site within five (5) days after the

receipt by him of an order in writing to this effect from the Engineer and shall

proceed with the same with due expedition and without delay.

24. TIME FOR COMPLETION

The Contractor shall complete the whole of the Works within Twenty Five (25)

}

days (herein referred to as Time for Completion) from the date of the Engineer's

order to commence pursuant to Clause 23, or such extended time as may be allowed

by the Engineer.

The Contractor shall provide and maintain sufficient Equipment and Personnel on

Site in order to complete all sitework operations including tests-pits, boreholes,

sampling, insitu testing and the like within five (5)

days from the date of the

Engineer's order to commence, or such extended time as may be allowed by the

Engineer.

25. RESTRICTION ON WORKING HOURS

Subject to any provision to the contrary contained in the Contract, none of the

Works shall, save as hereinafter provided, be carried on during the night or on

locally recognised days of rest without the consent of the Engineer, except when

work is unavoidable or absolutely necessary for the saving of life or property or for


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the safety of the Works, in which case the Contractor shall immediately advise the

Engineer.

26. EXTENSION OF TIME

If the amount or nature of any extra or additional work or any instruction by the

Engineer should be such as to fairly entitle the Contractor to an extension of time

for completion of the Works, the Engineer shall determine the amount of such

extension and notify the Contractor accordingly.

27. LIQUIDATED DAMAGES

In the event that the whole of Works are not completed within the time stated in

Clause 24 or such extended time as may be allowed by the Engineer, then the

Contractor shall pay to the Employer as liquidated damages for such default and not

as a penalty, one percent (1%) of the Contract Price for every day or part of a day

which shall elapse, between the time for completion and the date of completion

stated in the Certificate of Completion issued by the Engineer pursuant to Clause

29. Liquidated damage for such default shall not exceed fifteen percent (15%) of

the Total Contract Price.

28. SUSPENSION OF WORK

The Contractor shall on the written order of the Engineer suspend progress of theWorks or any part thereof for such time or times as the Engineer may consider

necessary to ensure that the Works may be executed properly. The Engineer shall

certify the cost of such suspension (if any) and allow such extension of time as in

his opinion shall be fair and proper.

29. COMPLETION OF WORKS

When the Engineer is satisfied that all Works on Site have been completed,

including in situ tests, reinstatement of ground and clearance of the Site, he will

issue a Certificate of Interim Completion. Thereafter, when the Engineer is satisfied

that the Contractor has fulfilled all other outstanding obligations including

submittal of the Final Report together with the full results of borehole logs, all

laboratory and in situ tests, he shall issue a Certificate of Final Completion to the

Contractor stating the date on which the Works were finally completed.

30. SUSPENSION THROUGH FAULT OF CONTRACTOR

If the Contractor is in default of his obligations under this Contract, or if in the

Engineer's opinion the Contractor is not performing the Works or any significant


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part of it in a reasonable and standard manner, the Engineer shall, without prejudice

to the Employer's right to terminate the Contract have the right to suspend the

progress of the Works or any part thereof.

Suspension of the work or part thereof caused by or attributable to the Contractor's

default shall not be compensated for, nor shall it excuse the Contractor from any ofhis obligations under the Contract.

Suspension of the Contract shall continue until the Contractor has, in the opinion of

the Engineer, remedied the default.

31. TERMINATION FOR DEFAULT

If, in the opinion of the Engineer, the Contractor is not performing the Works with

due diligence, or if the Contractor consistently fails to obey the Engineer's

instructions given under the Contract or if otherwise fails to perform any of his

obligations under the Contract, the Employer may give seven days written notice to

the Contractor of his failure to fulfil the Contract or to remedy the default. If the

Contractor fails to remedy the default during this time, the Employer may

terminate the Contract forthwith and employ others to complete the Works.

The Contractor will not be entitled to any payment until the whole of the Works

have been completed and thereafter until the costs of execution, completion,

remedying of any defect, damages for any delay in completion and all other

expenses incurred by the Employer have been ascertained and the amount thereof

certified by the Engineer. The Contractor shall then be entitled to receive only suchsum (if any) as the Engineer may certify would have been payable to him upon due

completion by him, after deducting the said amount.

RISKS AND INSURANCES

32. CARE OF WORKS

(a) From commencement until to completion of the Works the Contractor shall

take full responsibility for the care thereof and shall rectify and make good,

at his own cost, as instructed by the Engineer, any damage, loss or injury

that may occur to the Works, from any cause whatsoever, other than the

excepted risks defined under sub-clause (b) of this Clause.

(b) The 'excepted risks` are war hostilities (whether war be declared or not),

invasion, acts of foreign enemies, rebellion, revolution, insurrection or

military or usurped power, civil war or riot, commotion or disorder.

33. DAMAGE TO PERSONS AND PROPERTY


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The Contractor shall indemnify and keep indemnified the Employer against all

losses and claims in respect of death or injury to any person, or loss of or damage to

any property whatsoever including that of the Engineer which may arise out of or in

consequence of the execution of the Works and against all claims, demands and

proceedings, damages, costs, charges and expenses whatsoever in respect of or inrelation thereto.

34. INSURANCE OF WORKS ETC.

Without limiting his obligations and responsibilities under Clause 32 hereof the

Contractor shall insure the Works against all loss or damage from whatsoever cause

arising (other than the excepted risks) and for which he is responsible under the

terms of the Contract and in such manner that the Contractor is covered during the

period of execution of the Works to the full cost of re-execution and replacement of

such Works.

35. THIRD PARTY INSURANCE

Without limiting his obligations and responsibilities under Clause 33 hereof the

Contractor shall insure in the joint names of the Contractor and the Employer,

against liabilities for death or injury to any person (including any employee of the

Engineer or the Employer) or loss of or damage to any property (including that of

the Engineer) caused by or arising out of the execution of the Works.

36. ACCIDENT OR INJURY TO WORKMEN

The Employer shall not be liable for any damages or compensation payable at law

in respect of, or in consequence of any accident, death or injury to any workman or

other person in the employment of the Contractor. The Contractor shall maintain

all insurance required by law in respect of such liability.

37. TERMS AND EVIDENCE OF INSURANCE

The Contractor shall effect all insurances for which he is responsible under the

Contract with insurers and in terms approved by the Engineer.

The Contractor shall, prior to commencing the Works on Site, provide evidence to

the Engineer that such insurances have been obtained and effected, and shall when

required, produce to the Engineer the insurance policies in force and the receipt for

payment of the current premiums.

VARIATIONS AND FINAL ACCOUNT


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38. VARIATIONS

The Engineer may order any addition to or omission from the work to be performed

or order any other change in the Works and the Contractor shall promptly complywith such order. Any such order shall be in writing or shall be promptly confirmed

in writing by the Engineer if issued verbally. Whenever possible, the monetary

value of the variation shall be agreed between the Engineer and Contractor before it

is implemented and shall be valued at rates and prices entered in the Bill of

Quantities where such rates and prices are applicable to the varied work and on a

fair and reasonable basis where such rates and prices are not applicable.

39. FINAL ACCOUNT

As soon as possible after issue of the Engineer's Certificate of Final Completion

pursuant to Clause 29, the Contractor shall submit a Final Account showing:

(a) the value of work executed in accordance with the Contract.(b) any other amounts that the Contractor considers that he is entitled to under

the Contract.

The Engineer shall check the Final Account and may ask for further substantiation

of any amount stated in the Final Account and shall negotiate and agree with the

Contractor any adjustments to the amounts stated. The Engineer may also deductthe amount of any damages or other claim due to the Employer from the Contractor

under the Contract.

In the event of disagreement between the Engineer and the Contractor on any

amount stated in the Final Account, the Employer may withhold such amount

pending resolution of the disagreement but all undisputed amounts shall be paid in

accordance with Clause 41.

40. INCREASE OR DECREASE IN COSTS

No adjustment of the Contract Price shall be made in respect of any rise or fall in

the costs of labour, materials, testing or any other matters affecting the cost of

execution of the Works.

PAYMENTS

41. PAYMENT


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The Contractor shall be paid the Contract Price in accordance with the following

procedure:

(a) Forty percent (40%) upon issue of the Engineers Certificate of Final

Completion pursuant to Clause 29.

(b) Sixty percent (60%) upon agreement of the Final Account pursuant to Clause

39.

DISPUTES

42. DISPUTES

If within 60 (sixty) days after the date of submission by the Contractor of the Final

Account any outstanding dispute or difference has not been amicably agreed then

such dispute or difference shall be referred to and finally settled under the Laws of

State of Angola .


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AN11064-0100D-SPC-40A-GE-01 REV 0

PRC-EN-03 (F1A) REV 2 page 1/1

AN11064-0100D-SPC-40A-GE-01 REV 0

Table of contents

Ref Division section titleDesign discipline

Lead IDC

B Specification for Subsurface Investigation GE ENV,TR

IDC department

Department AR EL ENV GE LS PMC ME MR ST/BR TR

Approved

Date


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B. SPECIFICATION


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B. SPECIFICATION

FOR


40:0 GENERAL

0101 REFERENCED STANDARDS: Unless the Contract Documents include more

stringent requirements, referenced standards have the same force and effect as if bound or

copied directly into the Specification to the extent referenced and such standards are made

a part of the Contract by such reference.

0151 REFERENCED STANDARDS: The Contractor shall comply with the latest

published edition of referenced standards, including any supplements or revisions, in effect

as of the date fixed for submission of Tenders:

where a particular referenced standard is published or available in both imperial and

metric versions, then the metric version shall apply, unless otherwise indicated or

approved.

where compliance with two or more standards is specified and the standards

establish different or conflicting provisions for minimum quantitative or qualitative

requirements, comply with the most stringent requirement. Refer uncertainties and

requirements that are different, but apparently equal, for a decision by the Engineer,before proceeding.

the Contractor shall obtain copies of the latest published edition of all standards

referred to in the Specification. These shall be kept on the Site and made available

upon request for reference and use by the Engineer.

40:1 PARTICULAR REQUIREMENTS

1051 TYPE OF INVESTIGATION AND REPORT REQUIRED: geotechnical

investigation and report giving a full description of subsurface conditions and results of in

situ and laboratory testing together with recommendations for foundation design and

construction. Detailed description of the surface conditions and features within the site

shall be provided.

1055 TYPE OF INVESTIGATION AND REPORT REQUIRED: geotechnical

investigation and factual report giving a full description of subsurface conditions and

results of in situ and laboratory testing. Detailed description of the surface conditions and

features within the site shall be provided.


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1071 DESCRIPTION OF THE SITE: Construction of the Edifc.das Naes Unidas para

os PALOP'S at Angola.

1101 BOREHOLES: the total linear meters of borehole drillings shall be 205 m. A total

of 8 boreholes shall be drilled at the location and to a depth as shown in the drawings.

1102 BOREHOLES: the Contractor will be given the opportunity to comment on the

number, depths and positions of boreholes and invited to suggest alterations and additions

both before and during execution of the work.

1103 BOREHOLES: Boreholes shall be drilled to the depths shown on Drawings. If rock is

encountered, continuous coring shall be carried for a minimum of 5.0 m into good quality

rock or to the depths shown on Drawings whichever is achieved first or as directed by the

Engineer. Good quality rock is defined as rock with rock quality designation (RQD) value

more than 75% for a core run of 1.0 m and a core recovery of not less than 90%.

1121 TRIAL PITS: a total of three (3) trial pits shall be excavated to 3 m depth at the

locations shown in the drawing.

1151 IN SITU TESTS:

Standard Penetration Test

Dutch Cone (Static) Penetration Test

Pressuremeter Test

In Situ Permeability Constant Head

In Situ Permeability Falling Head

1201 LABORATORY TESTS: The following tests are to be carried out as frequently as

required, subject to the Engineer's approval, to describe adequately the natural variability in

the soil deposit:

moisture content

sieve analysis for granular materials

mechanical analysis by sedimentation for fine materials

dry and bulk densities of cemented and cohesive soil

plasticity indices

Linear shrinkage of soil

specific gravity

chemical analysis of soil and ground water

calcium carbonate content of soil or rock


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unconfined compression tests on cohesive soils

unconsolidated undrained triaxial compression tests on cohesive soils

consolidated drained direct shear (or triaxial) compression tests on cohesive soils

one dimensional consolidation tests on cohesive soils

determination of the dry density/moisture content relationship of soil

determination of the California Bearing Ratio (CBR)uniaxial compression tests on rock cores

static elastic modules of cores

point load index of rock samples.

1251 RESPONSIBILITY: The Contractor is responsible for:

true and proper setting out of boreholes and test locations in relation to permanent

reference points or bench marks

accuracy of levels of tops of boreholes

accuracy of depth records to given bench marks on or near the site

accuracy of his observations generally and for his reports on the observations.

1253 QUALITY ASSURANCE - CODES AND STANDARDS: Comply with provisions

of following codes, specifications, and standards, except where more stringent

requirements are shown or specified: ASTM Standards, BSI Standards, ISRM 1985, Earth

Manual.

1301 QUALITY ASSURANCE - SUPERVISION: the Contractor's agent for the work is to

be, or alternatively he is to have on his staff, a soils' engineer, engineering geologist, or

geotechnical engineer fully experienced in site investigation work. This specialist is to be

on the site full time readily available to both the drillers and the Engineer.

1351 PROJECT CONDITIONS - SERVICES AND STRUCTURES: where underground

services or structures are thought to exist in the immediate vicinity of a borehole position,

an exploratory pit is to be dug to such a depth that it is reasonably certain that all

underground services and structures have been uncovered. After this normal boring may

proceed.

1401 PROJECT CONDITIONS - POLLUTION: do not foul the atmosphere, any river,

stream, watercourse or sewer. Make provision for discharge or disposal from the work or

temporary work of water waste products and spoil however arising. Method of disposal is

to be to the satisfaction of the Engineer and of any other authority or person having an

interest in any land or watercourse over or in which water and waste products may be dis-


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charged. Requirements of this clause will not limit any of the Contractor's statutory

obligations or liabilities.

1402 PROJECT CONDITIONS - POLLUTION: ascertain any natural or man-made

sources of pollution which might deleteriously affect groundwater.

1451 POSITION OF BOREHOLES: fix positions of boreholes and standpipes as installed

from features of the site for ease of reference and record their co-ordinates in the report on

the investigation.

1501 OBTAINING AND STORING SAMPLES: methods of sampling and subsequent

handling, labelling and storage of samples are to be in accordance with the applicable

procedures described in ASTM 04.08.

1551 SUBMITTALS - DAILY BOREHOLE RECORDS: daily borehole records shall be

submitted to the Engineer not later than noon on the following day.

1552 DAILY TEST PIT RECORDS: daily test pit records shall be submitted to the

Engineer not later than noon on the following day.

1553 DAILY REPORTS: should include weather conditions, work progress, difficultiesand any other significant event.

1554 SUBMITTALS - PROGRAMME OF LABORATORY TESTING: programme of

laboratory testing is to be oriented towards obtaining data pertinent to the work.

Programme and type of laboratory testing are to be submitted to the Engineer for approval

for each borehole within 48 hours, after completion of the borehole.

1555 SUBMITTALS - GEOLOGICAL MAP: submit a detailed engineering geological

map showing surface deposits whether naturally occurring or man-made at a scale agreed

by the Engineer.

1556 SUBMITTALS - DRAFT REPORT: two (2) copies of the draft report including all

the requirements detailed in Clause 1560 below shall be submitted to the Engineer for

approval at least six (6) days before the end of the Contract Period. The Engineer shall

inform the Contractor of any corrections or amendments within three (3) days of receipt of

the draft.


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1560 SUBMITTALS - FINAL REPORT: four (4) bound copies and one (1) unbound copy

of the accepted report in English, describing the work shall be produced in A4 size and

contain the following factual information:

Exploratory borehole records;

In situ test records;

Plots of all laboratory and in situ test results against depth;

Laboratory test records and summaries;

Plans with location of exploratory holes;

Plan showing surface deposits / rock outcrops, fill, geologic features (Engineering

Geological map);

Schedule of contents;

Independently bound appendix of colour photographs of all rock cores, test pits and

trenches and any other features relevant to the text and observations;

Geological cross section(s) of the site;

Soft copies using EXCEL version 5.0 or latest version, shall be submitted on

computer CD /DVD which shall include:

- All laboratory testing, in tabular and graphical form

- Summary tables of the laboratory testing results

- Soil and rock classification.

Soft copies of boreholes and test pits shall be submitted in Excel or any other

approved programme.

The soft copy of the text of the report shall be submitted in MICROSOFT WORD

Version 6.0 or latest version.

40:2 BORING AND SAMPLING

2050 EXPLORATORY PITS: an exploratory test pit shall be hand dug at borehole location

to ascertain that drilling shall avoid all existing underground utilities.


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2051 BORING METHOD: support boreholes with casing as necessary to prevent collapse

of sides. Bentonite may be used when this will not interfere with sampling of soil or in situ

testing.

2052 BORING METHOD: carry out work in such a way that groundwater levels over thesite are not generally affected and take precautions to prevent surface water entering

boreholes.

2053 BORING METHOD - BORING IN SOIL: boring in soil is to be to minimum

diameter of 150 mm, unless otherwise directed by the Engineer, and undertaken either by

shell and auger (cable percussion) or by rotary power hollow stem auger of type which

enables samples of at least 100 mm diameter to be obtained using open or piston samplers.

2054 BORING METHOD - BORING IN ROCK: unless otherwise specified for in situ

tests in boreholes, drill rock by rotary coring methods to obtain cores of not less than

76 mm diameter.

2055 BORING METHOD - BORING IN ROCK: use of rotary percussion method of

drilling (down the hole hammer) will only be allowed with the approval of the Engineer.

2071 BORING METHOD - DRILLING FLUID: drilling fluid is normally to be fresh water

in order not to contaminate the soil and affect the results of insitu permeability tests. Amixture of water and bentonite may be allowed, subject to the Engineers approval, if there

is difficulty in keeping borehole sides stable. Where the presence of collapsible soils is

suspected, air drilling shall be used to maintain the natural moisture content of the samples.

Use of air or air entrained foam or other fluids will be allowed only with the approved of

the Engineer or when it is the only means to obtain good quality samples (refer to Clause

2272).

2101 BORING THROUGH OBSTRUCTIONS: if an obstruction is encountered which

prevents further progress in boring by shell and auger or rotary power auger, attempt to

break through the obstruction by chiselling. If size or composition of obstruction is such

that little or no progress is made by chiselling, inform the Engineer and if instructed use

rotary coring methods to drill through and obtain cores of the obstruction not less than

100 mm diameter.

2102 BORING THROUGH OBSTRUCTIONS: if boring shows that the obstruction is

bedrock, continue rotary core drilling to depth and diameter required by the Engineer to

prove continuity and engineering characteristics of formation.


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2103 BORING THROUGH OBSTRUCTIONS: if boring shows that the obstruction is

boulder, ledge of rock or other object underlain by soil, inform and agree with the Engineer

the use of one of the following lines of action:

chisel out the cored borehole through the obstruction sufficient to allow shell andauger boring, in situ sampling and testing to continue below the obstruction continue

boring by rotary core drilling to required depth and diameter of borehole and agree

with the Engineer as to whether or not it is necessary to obtain undisturbed samples of

soils in a nearby borehole at levels beneath the obstruction

abandon borehole and drill another one nearby to obtain necessary samples.

2151 GROUNDWATER OBSERVATIONS: When groundwater is encountered in a

borehole immediately cease boring and observe and record by means of a dipmeter / water

level meter any movement in level of groundwater. Cease boring for half an hour at the

end of which period again record water level. Obtain the Engineer's instructions and, if re-

quired by him, install standpipe or piezometer as specified on completion of borehole.

2152 GROUNDWATER OBSERVATIONS: Observe and record changes in water level in

deeper aquifers. Make records of groundwater levels as specified and refer to datum used

for the work.

2153 GROUNDWATER OBSERVATIONS: If casing is used and this forms a sealagainst entry of groundwater, record depth at which no further entry or only insignificant

infiltration of water occurs.

2154 GROUNDWATER OBSERVATIONS: If it is necessary to add water to the

borehole to facilitate boring, use sparingly and not in such a manner as to prevent accurate

observation of groundwater conditions in the borehole.

2155 GROUNDWATER OBSERVATIONS: Install standpipes in bore-holes to the

numbers and depths required by the Engineer. Standpipe is to comprise a rigid polyvinyl

chloride or galvanised iron pipe 45 mm minimum diameter having at its lower end an

approved porous filter element or alternatively perforated for a length of at least 500 mm.

Surround filter or bottom of pipe with sand or sand and gravel mix graded to prevent entry

of soil particles into pipe. Place layer of graded mix in bottom of borehole prior to

lowering stand-pipe. Place sand or sand and gravel mix in position before withdrawing

borehole casing. Provide screwed cap to top of standpipe which is not to be less than 150

mm below ground level. Protect cap with short length of 150 mm diameter pipe set

vertically with upper end covered by paving slab set flush with ground surface.


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2156 GROUNDWATER OBSERVATIONS: When instructed by the Engineer fill

annulus above filter with a layer of bentonite - cement grout. Drop a plug of stiff bentonite

in the form of balls down borehole and carefully tamp into place and follow by pumping

down bentonite - cement grout to fill borehole to a level of at least 0.5 m above filter or as

instructed by the Engineer. When instructed by the Engineer also form a plug of bentonite

- cement mix of stiff plastic consistency and carefully tamp into place below level ofstandpipe to form seal against upward flow of groundwater into standpipe from a deeper

aquifer.

2157 GROUNDWATER OBSERVATIONS: During the period of the work take daily

readings of water levels in all standpipes by means of a dipmeter / water level meter or, if

so directed, at more frequent intervals. When directed by the Engineer return to the site at

intervals to make additional water level readings.

2201 SOIL SAMPLING - UNDISTURBED SAMPLES: obtain in all cohesive soils or

mixed soil having sufficient cohesion at depth intervals of 1m. The 200 mm of soil

immediately above the level of soil to be sampled should be removed without the casing

being lowered. Carefully clean boreholes before sampling.

2202 SOIL SAMPLING - UNDISTURBED SAMPLES: take samples in seamless

sampling tubes not less than 100 mm internal diameter and 450 mm long designed so that

samples can be sent to the laboratory without removal. Area ratio of sampling tube is to be

less than 15%.

2203 SOIL SAMPLING - UNDISTURBED SAMPLES: oil the sampling tool inside and

out. Force tool into soil by jacking or, where this is not possible, by carefully hammer

driving. Check distance tool is driven to prevent soil becoming compressed in sampler.

Use double tube samplers or piston samplers if these prove to be the only means of

obtaining acceptable samples. In soft clays take particular care to avoid disturbance of

sample. In hard clays or cemented soils use a Denison sampler or similar.

2204 SOIL SAMPLING - UNDISTURBED SAMPLES: immediately after taking

samples from the boreholes remove a 25 mm thick layer from each end and seal ends with

a thick coating of paraffin wax or other wax approved by the Engineer. Store the 25 mm

thick layers in an airtight container for classification testing. Place a close fitting lid or

screwed cap over each sample tube end and make tube airtight. Send samples to the

laboratory, suitably packed to prevent damage or disturbance. Number and label each tube

so that sample can be identified giving borehole, soil stratum, depth at which it was taken

and date.

2251 SOIL SAMPLING - DISTURBED SAMPLES: perform standard penetration test as

specified to recover a disturbed sample of soil at intervals of not more than l m in the top 5


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m and at intervals of 1.5m or at the change of each strata thereafter, unless otherwise

instructed by the Engineer.

2252 SOIL SAMPLING - DISTURBED SAMPLES: where undisturbed soil samples and

standard penetration test samples are not obtained, recover disturbed samples of soils fromboring tools. Obtain disturbed samples at such spacing to ensure that samples from

borehole either in the form of undisturbed samples, standard penetration test samples or

disturbed samples are obtained for every 1 m depth bored. Minimum weight of disturbed

samples is to be as specified in ASTM D 420.

2253 SOIL SAMPLING - DISTURBED SAMPLES: where soil samples are required for

compaction tests, the minimum weight of sample is to be 50 kg, unless otherwise instructed

by the Engineer.

2271 CORING: continuous cores of all cemented material are to be recovered, great care

being taken to obtain good recovery of weakly cemented material. Core barrel is to be

fitted with coring bit most suited to formations being drilled and which yields best

recovery.

2272 CORING: for coring in marl or other material that may be sensitive to water,

compressed air shall be used as drilling fluid to obtain good samples.

2273 CORING: coring runs are to be limited to not more than 2 m. However, if core

recovery is less than 80% the run is to be reduced until an acceptable recovery for

subsurface conditions is obtained, as approved by the Engineer.

2301 ROCK SAMPLING - ROTARY CORING METHODS: where boreholes are bored

using rotary coring methods, extract rock cores of not less than 76 mm diameter, unless

otherwise directed by the Engineer. After being brought to the surface remove core from

core barrel by methods designed to cause least possible further disturbance.

2302 ROCK SAMPLING - ROTARY CORING METHODS: where split inner core barrels

are not in use extract core by steadily applied pressure. Extraction by means of hammering

the barrel or explosive extrusion under high air pressure or water pressures will not be

permitted. After extrusion place core in a purpose made core box.

2303 ROCK SAMPLING - ROTARY CORING METHODS: adequately preserve cores

and log. Photograph weak rock cores and those subject to disintegration on recovery.


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2351 ROCK SAMPLING - CORE BOXES: to be of sound, robust construction able to

withstand weight of core and any full boxes which may subsequently be placed on them

and sufficiently watertight to protect core from rain. They are to be specially made to hold

size of core being obtained tightly in place in rows separated by wooden slats. Boxes are to

have strong metal hinged lid fitted with padlock, hasp and staple for closing and end ropes

for handling. Top and bottom of boxes are to be reinforced by cross straps to aid stackingand retrieval. Boxes are to be constructed of wood, marine plywood or other material

approved by the Engineer.

2401 ROCK SAMPLING - PLACING CORES IN BOXES: as cores are extruded lay them

in core box with shallowest core to left and deepest to right. Place highest row of core

nearest lid hinge. Box is to be identified inside and outside by the site name, borehole

number, core box number, depth of top and bottom of core included, the Contractor's name

and the date. Information is to be either painted on box or stamped on metal labels waxed

and nailed to box.

2402 ROCK SAMPLING - PLACING CORES IN BOXES: paint the depth of the top and

bottom of the total core and separate core runs on blocks of wood or other material

approved by the Engineer made to fit between dividing slots.

2403 ROCK SAMPLING - PLACING CORES IN BOXES: in order that zones of core loss

can be readily identified insert wooden dowels cut to appropriate lengths and suitably

identified either in sections where loss occurred or at base of particular core runs.

2404 ROCK SAMPLING - PLACING CORES IN BOXES: first seal with aluminium foil

and subsequently cover with wax, sections of core which are weak and friable, formed of

rocks or soils which are likely to dry out or otherwise alter in nature with time, before

placing in core box.

2405 PHOTOGRAPHS: all core boxes shall be photographed as soon as possible after

extraction. Photographs shall be free from distortion and shall include a scale and colour

chart. All boxes shall be clearly labeled and show the depth to the top and bottom of each

core run.

2451 HANDLING SOIL AND ROCK SAMPLES: Take care in handling and transporting

samples of soil and cores of rock from the site to the testing laboratory. Where possible

use transport manned by skilled personnel and arrange that those responsible for

transporting samples are informed of the need to avoid unnecessary disturbance.

2470 SOIL AND ROCK DESCRIPTION: All soil and rock description shall be in

accordance with BS 5930. Alternatively, the following general scheme could be used in the


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description of the surface geology and all soil and rock samples from either boreholes or

test pits.

SOIL ROCK

Prefixes

Strength or relative densityStructure and weathered state

(if appropriate)

Colour

Secondary constituents

Particle shape and grain size

(for coarse grained soils)

ColourGrain size

Texture and structure

Weathered or alteration state

Discontinuities

SOIL NAME (in capitals) ROCK NAME (in capitals)

Suffixes

Plasticity (for fine grained soils)

Minor constituents and lithologicalcharacteristics

Other information of special engineering

interest

Geological formation (in brackets)

Mechanical strength

Minor lithological characteristicsOther information of special engineering

interest

Geological formation (in brackets)

2501 GROUNDWATER SAMPLING: Take a sample of groundwater as soon as sufficient

water has entered borehole after boring has reached groundwater level.

2502 GROUNDWATER SAMPLING: If water has been added to bore-hole before

reaching groundwater level bale out all water in borehole and allow uncontaminated

groundwater to seep back into borehole before sample is taken.

2503 GROUNDWATER SAMPLING: Where groundwater is sealed off by borehole

casing and a lower aquifer is encountered take a sample of water from this and any

succeeding aquifers.

2504 GROUNDWATER SAMPLING: Sample of groundwater is to be at least 500 ml involume and placed in clean jars or bottles already rinsed with the water to be sampled and

labelled and stored as described in BS 5930.

2551 COMPLETION AND BACKFILLING BOREHOLES: Completion of boreholes and

start of backfilling are to be approved by the Engineer unless he has given prior instructions

on depth at which boreholes are to be terminated. Place soil back-filled into boreholes in

layers, each successive layer being tamped by boring tools.


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2552 COMPLETION AND BACKFILLING BOREHOLES: Backfilling is to be done as

casing is withdrawn.

2553 COMPLETION AND BACKFILLING BOREHOLES: When instructed by the

Engineer backfill boreholes with concrete having a cement content not less than 250kg/m3.


Engineer backfill boreholes with bentonite/cement mix of approved consistency.


Engineer suitably plug boreholes where they might otherwise penetrate an aquiclude and

thus lead to contamination of water in an aquifer or to problems presented by encountering

water when engineering works are undertaken within the relatively impermeable ground

represented by the aquiclude.

2556 COMPLETION AND BACKFILLING BOREHOLES: Where boreholes are to be

backfilled in areas of present or future underground water supplies obtain advice from

water authority concerned on the particular measures required to prevent pollution.

2601 TEST PITS - EXCAVATION: Excavate test pits having plan area of not less than 1.5

m2 in positions instructed by the Engineer. Provide all pumping and take all measures (e.g.sheet piling, timbering etc.) to ensure stability of adjacent structures or installations and

safe conditions for descent into and working in the pits. While observations are in progress

take all necessary steps to exclude water from test pits.

2602 TEST PITS - DISTURBED SAMPLES: take disturbed samples every 1m or at every

change of strata, whichever is the least. Minimum weight of samples is to be as specified in

ASTM D 422 for classification.

2603 TEST PITS - DISTURBED SAMPLES: take a minimum of two representative

samples suitable for compaction testing from each test pit in accordance with Clause 2253.

2604 TEST PITS - UNDISTURBED SAMPLES: take undisturbed samples, as required by

the Engineer, in accordance with Clauses 2202, 2203 and 2204.

2605 TEST PITS - GROUNDWATER SAMPLES: take groundwater samples in

accordance with Clause 2504.


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2606 TEST PITS - PHOTOGRAPHS: a minimum of two photographs per test pit shall be

taken. Photographs shall be free from distortion, shall be clearly labeled and shall include a

scale and colour chart.

2607 TEST PITS - BACKFILLING AND REINSTATEMENT: test pits shall not be

backfilled without the Engineers instruction. Place backfill into test pit in layers, each

successive layer being tamped. Reinstate surface to condition existing before excavation to

the satisfaction of the Engineer.

2610 TEST PITS - COLLAPSIBLE SOILS: Where possible, undisturbed samples shall be

obtained by hand carving for the purpose of odometer testing.

2620 TEST PITS - COLLAPSIBLE SOILS: dry density shall be measured at various

horizons in the pit. Plate load test in unsoaked and soaked conditions shall be performed to

determine the most critical collapse potential below foundation level.

2651 BOREHOLE RECORDS: Supply to the Engineer a journal of each days boring not

later than noon on the following working day.

2652 BOREHOLE RECORDS: Where boring is by shell and auger or rotary power auger

the journal is to state:

Job name

date and times of boring

borehole number

ground level at position of boring

type of plant used and method of boring

diameter of boring

diameter and depths of casing

all water levels encountered including measurements of fluctuation of adjacent tidal

waters, lakes or rivers

depths at which groundwater was sealed off

level at which groundwater was standing at commencement and termination of

working day (where a boring is on land but is near tidal waters the level of those

waters is to be recorded at intervals throughout the day)

level at which water, if any, was added to borehole

levels of water in standpipes

depths of base of each stratum from ground level and preliminary description of

stratum

records of in situ tests made and instrumentation installed

time for chiselling through obstruction and weight of chisel

other relevant remarks.


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2653 BOREHOLE RECORDS: Where boring is by rotary coring methods the journal is to

state:

Job name

date and times of boringborehole number

ground level at position of boring

type of plant used and method of operation including details of type of flushing

type of core barrel and bit

depth of hole at start and end of working day or shift as relevant depth of start and

finish of each core run

core diameter and changes in core size

state of bit

time to drill each core run

character and proportion of each flush return

level at which groundwater was standing at commencement and termination of

working day (where a boring is on land but is near tidal waters the level of those

waters is to be recorded at intervals throughout the day)

depths of base of each stratum from ground level and preliminary description of

strata

total core recovery (TCR) defined as percentage of the rock recovered during a

single core run, with information as to possible location of core loss

Rock Quality Designation (RQD) of each run; RQD is the ratio expressed as a per

cent of aggregate length of core pieces over 100mm in a run divided by length of

run

Solid core recovery defined as percentage of full diameter core recovered during a

single core run

Fracture Index defined as the number of fractures per unit meter.

details of in situ tests and instrumentation installed

other relevant remarks.

2654 BOREHOLE RECORDS: Where boring is from marine craft other relevant remarks

are to include:

state level to which borehole data to be referred

time and height of high and low water at a tide gauge and tidal heights at intervals

as directed by the Engineer


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time and height of water levels at borehole position at intervals as directed by the

Engineer

details of movement of water levels within borehole related to fluctuation of water

levels at borehole locations

detailed records of delays due to reasons other than failure of boring equipment

(e.g. craft dragging anchors, mist, shipping movements and broken drilling tubes)

detailed records of movements, vibration and oscillation of drilling tubes

detailed records of bowing of drilling tubes because of waves, tidal currents etc.

2655 TEST PIT RECORDS: Where test pits are excavated the journal is to state:

dates and times of excavation

test pit number

ground level at position of test pit

type of plant used and method of excavation

stability of sides and method of support

dimensions of pit

depth at which groundwater was encountered, assessment of rate of infiltration and

details of water pumped outdepths of base of each stratum from ground level and detailed description of

stratum

records of samples taken and in situ tests made

sketches of two sides of pit

sketch showing orientation of photographs

details of backfilling

other relevant remarks

2701 FINAL BOREHOLE LOGS: after completion of all soil tests and visual examination

of all samples in the laboratory prepare final borehole logs including grid or topographical

reference and details similar to those in borehole records but corrected in the light of all

information finally available and in the light of description by a qualified soils engineer or

engineering geologist.

2702 FINAL BOREHOLE LOGS: in the case of cores obtained by rotary drilling methods

the final borehole logs are to state in addition to information given in borehole records:

condition of each core run in terms of percentage recovery and rock quality

designation, i.e. percentage of solid core recovered in pieces longer than 100 mm


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definition of rock type, its alteration state and relative strength; details of natural

discontinuities and rock structures and nature of joint or fracture infillings.

2703 FINAL TEST PIT LOGS: after completion of all soil tests and visual examination ofall samples in the laboratory prepare final test pit logs including grid or topographical

reference and details similar to those in test pit records but corrected in the light of all

information finally available and in the light of description by a qualified soils engineer or

engineering geologist.

2751 VARIATIONS: the Engineer, upon examination of borehole logs, may request

changes in number, location and depth of boreholes. The Contractor will not be entitled to

modify his unit prices as a result of such changes.

40:3 IN SITU TESTING

3101 STANDARD PENETRATION TEST: This test is to be performed at 1.0 m intervals

in the top 5 m and at intervals of 1.5 m and at the change of each stratum thereafter. If

gravely soil is encountered the standard penetration tool is to be fitted with a cone at its tip

and test carried out as normal. Standard penetration test sampler is to have internal

diameter of 35 mm and external diameter of 50 mm and is to be driven with a 63.5 kg

hammer dropped 0.76 m. Hammer is to be dropped using free-drop trigger release

mechanism allowing control of the 0.76 m drop. Bottom of casing is to be stopped at testlevel and borehole cleaned down to bottom of casing and test is to start from that level

down. Casing is not to be lowered during performance of the standard penetration test.

3102 STANDARD PENETRATION TEST: This test is to be performed to ASTM D 1586.

Notwithstanding all precautions specified to avoid carrying out test in loosened soil, there

is good reason to believe that unrealistically low results are being obtained or soil flows

into borehole so fast as to prevent test being carried out, report to the Engineer and obtain

his instruction regarding whether an alternative test is to be undertaken.

3151 STATIC (DUTCH) CONE PENETRATION TEST - APPARATUS: Penetrometer

for static cone penetration test is to consist of a rod with cone and sleeve which surrounds

rod so arranged that both cone and sleeve can be advanced together or independently of

each other. Alternatively the cone is to be fixed to the end of a hollow rod without means

of independent movement. Cone is to have apex angle of 60 degrees and cross-sectional

area of 0.01 m2. Mantle is to be provided above cone.

3151 STATIC (DUTCH) CONE PENETRATION TEST - APPARATUS: Penetrometer is

to be forced into soil by means of a static load. Where required depth of penetration is not


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great and soil is suitable, static load may be provided manually. Elsewhere apply load by

mechanical means using as resistance either kentledge, screw anchors or other approved

means.

3151 STATIC (DUTCH) CONE PENETRATION TEST - APPARATUS: Measure loadapplied to penetrometer by pressure gauge, strain gauges or other means approved by the

Engineer.

3201 STATIC (DUTCH) CONE PENETRATION TEST - OPERATION OF

APPARATUS: To carry out test first drive cone and sleeve of penetrometer together into

soil to measure combined cone and shaft resistance. Then advance cone independently of

sleeve to measure cone resistance alone. Alternatively push down the hollow rod fixed to

the cone in a continuous movement. In this case measure resistance of soil to thrust by the

cone and skin friction on mantle above cone continuously by means of electrical resistance

strain gauges installed within these components.


APPARATUS: Carry out tests at convenient intervals generally not exceeding 250 mm

until required depth of penetration has been reached.


APPARATUS: If progress becomes impossible before specified depth has been reached,

drill a borehole to level where progress ceased and continue test from bottom of this bore-hole or successive boreholes drilled in like manner until specified depth has been reached.

3251 STATIC (DUTCH) CONE PENETRATION TEST - RESULTS OF TESTS: to be

presented in the form of three graphs:

combined penetration resistance of cone and sleeve plotted against depth

penetration resistance of cone plotted against depth

penetration resistance of sleeve plotted against depth.

Provide an interpretation of results if instructed.

3401 PRESSUREMETER TEST: Ensure that pressuremeter tests are carried out by those

competent in the testing technique and its interpretation. Method used should conf