site investigation for building plan layout · pdf fileabdul samad abdul rahman faculty of...
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Abdul Samad Abdul Rahman
Faculty of Civil Engineering
Universiti Teknologi MARA,
Shah Alam, MALAYSIA
SITE INVESTIGATIONfor BUILDING PLAN
LAYOUT
CONVENTIONAL APPROACH TO SI
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At the end of this lecture/week, the students
will be able to :
LEARNING OUTCOMES
Learning Outcomes :
1. Understand the coverage of SI for building plan layout
2. Discuss the elements contain in the Desk Study
Week 2 : (3HL) Coverage : Planning SI for building
layout. Site Reconnaissance and Desk Study of the
Proposed Site.
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1.0 Introduction of SI for building layout plan
2.0 Desk Study
3.0 Planning Scope of Site Investigation
OUTLINE of PRESENTATION
CONVENTIONAL APPROACH TO SI
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SITE INVESTIGATION PLANNING
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SITE INVESTIGATION PLANNING
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SITE INVESTIGATION PLANNING
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SI – an essential component of
Geotechnical Design
Scope of the guidelines
1.0 INTRODUCTION TO GUIDELINES
CONVENTIONAL APPROACH TO SI
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Project brief with site & location plan
Topo maps for assessing the terrains
Geological maps for assessing the
geological formations
Aerial photos for assessing the site
Performance evaluation of existing roads
Review of all available information
2.0 DESK STUDY
CONVENTIONAL APPROACH TO SI
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Possible issues to be encountered
Establish the purpose and need for SI
What soil properties required
Extent of ground to be investigated
Fund, time & site constraint
3.0 Planning Scope of SI
Having completed the desk study, the
following must be tackled before
embarking on the scope of work
CONVENTIONAL APPROACH TO SI
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3.1 Building layout on Soft/Weak
Ground
3.2 Building layout on Slope & Hilly
Terrains
3.3 Cut Areas
3.4 SI for Structures
Typical geotechnical problems & usual
application of SI methods and tests
SSI …cont...
CONVENTIONAL APPROACH TO SI
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Excessive total settlements
Excessive differential problems
Slope instability
3.1 Building layout on Soft/Weak Ground
SSI …cont.
Typical problems :
Analysis and design :
To check & determine bearing capacity
To check & determine slope stability
To check & determine amount & rate of
settlement
CONVENTIONAL APPROACH TO SI
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OVERVIEW OF THE PROJECT
SLOPE RECTIFICATION WORKS
ON CUT SLOPE AREA AT
KOMPLEKS IMEGRESEN
PENGKALAN HULU, MUKIM
PENGKALAN HULU, PERAK
DARUL RIDZUAN
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PROJECT BRIEF
• Client
Immigration Department of Malaysia
• Project Manager
Public Work Department
• Geotechnical Consultant
Kumpulan Ikram Sdn Bhd
• Project Cost - 2.5 Million
• Project Duration - October 2003-July 2004
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SCOPE OF WORKS
• The Objective of Works To Be Carried Out:
-Understand subsurface condition
and geology at study area.
-Understand type of slope failure.
-Determine probable causes of failure.
-Propose mitigation measures.
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SITE INVESTIGATION
PLANNING
•Desk Study
-Previous SI Report
-Borehole logs
-Laboratory Test Result
- Layout Plan
-Geology Map
-Topographic Map – Contour etc.
-Drainage System – Natural & Manmade
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SITE INVESTIGATION
PLANNING
• Forensic Works
-Geological Study
- preliminary study and mapping
-Geotechnical Study
– soil type, soil strength, drainage
system.
-Engineering Geology Study
- ground profile.
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RESULT OF FORENSIC
WORKS
Need Detail Investigation on Sub-Surface
• To carried out SI (Boreholes)
-3 locations
- 2 (Two) nos. of borehole along failure area (Adjacent crown and toe of
slope)
- 1 (One) nos. of borehole at non-
failure area.
• To carried out JKR Probe Test – 50 points
• To install Stand Pipe Piezometer – 3 locations
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SUB-SURFACE
INVESTIGATION
• Borehole
-Three (3) nos. of borehole was drilled.
-Type of Drill - Rotary Wash Boring
-Criteria of terminating boreholes:
-BH 1Maximum depth 16.12m
-BH 2Maximum depth 10.05m
-BH 3Maximum depth 6.30m
-Distance BH1 to BH2 = 26m
-Distance BH2 to BH3 = 17m
• BoreLog
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Boreholes
• Layout of each borehole
• Layout of failure area in 3D
• Why three location borehole has been
identified during this study.
-Mechanism and mode of failures
-Ground water condition
-Soil strength parameter
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SOIL PROFILE OF THE SLOPE
• Section A-A
• Section D-D
• Section F -F
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Summary of Subsurface Thickness According
To The Bore Logs
BH BH1 BH2 BH3
Reduced Level (m) 372.421 366.936 357.011
Residual Soil layer thickness (m) 1.50 - -
Completely Weathered of Interbedded Red
Shale, Sitlstone and Mudstone layer thickness
(m)
10.11 10.11 2.30
Moderately to Highly Weathered
Carbonaceous Shale thickness (m) before end
of borehole
4.51 5.55 4.00
Total depth of borehole (m) 16.12 10.05 6.30
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CONVENTIONAL APPROACH TO SI