ETC3 Meeting 11.06.2015 – Minutes p. 1/5

ETC3 MEETING 11.06.2015 - MINUTES Participants : Maurice BOTTIAU (chair), Monika DE VOS, Carlos FERNANDEZ-TADEO, Paul

HOELSCHER, Robert HOFMANN, Noël HUYBRECHTS (secr.), Alain LE KOUBY, Jaime SANTOS, Josif JOSIFOVSKI, Mait METS, Ole MøLLER, Trevor ORR, Panu TOLLA, Jean-Paul VOLCKE

Apologised : Alessandro MANDOLINI, Andrey PONOMARYOV 1. Minutes of the previous webex meeting of 21.04.2015 Noël introduces the meeting and welcomes the participants. No remarks with regard to the minutes of the previous meeting. Open actions from the previous meeting will be addressed further in these minutes. The minutes are approved. 2. ETC3 members and liaisons UK confirmed to nominate a representative soon. NL has still to formalise their representative(s). Noël contacted them once again, but up to now he didn’t receive an answer (action Noël). There are no new ETC3 members since last meeting. All liaisons are confirmed. Updated list of ETC3 members and liaisons : see annex. 3. ETC3 website : www.ETC3.be The new ETC3 website is in its final stage. Note : the site is online since 23.06.2015. All ETC3 members are asked to send relevant reference documents with regard to piles and the terms of reference (design, SLT, DLT, RLT, integrity testing) that can be posted on the new website. Check copyright (action Monika). 4. International ETC3 Symposium : Design of piles in Europe. How did Eurocode 7 change daily practice ? – The venue changed because there is another big event in Brussels at the same dates.

New venue : Park Inn by Radisson, Leuven (15 min. direct train from the airport). – Dates : 28th – 29th April 2016, after the CEN TC 250 SC 7 meeting on 27th April.

ETC3 Meeting 11.06.2015 – Minutes p. 2/5

– The International Advisory Committee is composed of the ETC3 Members and Liaisons, Antonio Gens (European Vice President of ISSMGE), Roger Frank (President of ISSMGE) and Flor De Cock (Former ETC3 Chairman). They all accepted.

– Antonio Gens is apologised for the symposium, Roger Frank and Flor De Cock will be present.

– The following liaisons confirmed their presence at the symposium : Andrew Bond (CEN TC 250/SC 7), Christian Gilbert (CEN TC 2188), John Powell (CEN TC 341/ISO TC 182).

– The final draft of the 1st Bulletin was sent together with the agenda of the meeting. More attention should be given to the presence of the chairmen of the linked technical committees. The 2nd Bulletin should be ready for Edinburgh (action Monika).

– Proceedings : Adapted template for national reports has been distributed by mail on 22.05.2015. Template for key notes and general reports to be established (action Noël).

– National reports :

The national representatives in ETC3 are responsible for the organisation of the elaboration of the national report (action ETC3 members).

No strict limit on # of pages (+/- 20 pages/country). Adapted content : see annex. The design example in the national report is a local example, to illustrate the

described design method. The design examples for comparison purposes mentioned below, are 2 or 3 well documented sites, aiming to compare the design methods of different countries.

It’s not the aim to present the national reports as such, but to present general thematic reports, based on the analysis of the national reports.

– Programme :

A more detailed proposal is given in annex. Opening address by Roger Frank. General thematic reports based on the analysis of the national reports. Keynote lectures : important collaboration/interaction with European standardisation

process. 1 keynote based on design examples. Friday morning : Discussion session on structural capacity of piles, material aspects,

slenderness, other kinds of loading (laterally loaded piles,…). Friday afternoon : Discussion session on monitoring, quality control & testing practice

+ overview of ongoing R&D activities on pile foundations in Europe. Some general reporters and discussion leaders still need to be identified. Please let

us know if you are interested or if you know someone who is interested (action all ETC3 Members).

Key note about DLT and RLT practice in Europe : Panu or Gary will contact Hermanson (?).

Based on the feedback a detailed proposal of the symposium program will be elaborated (action Maurice/Noël). Deadline : Edinburgh !

– Design examples :

Criteria : – Sites that cover a typical North European, UK-Central/Eastern Europe and South

European subsoil profile – Extensive ground investigation : CPT, SPT, PMT, lab tests – Preferably with pile load test results

ETC3 Meeting 11.06.2015 – Minutes p. 3/5

Information received : – Central Europe : 2 sites in Belgium (Monika), 1 site in France (Alain) – Scandinavia : 1 site in Sweden (Gary) – Panu will contact Gary to obtain info

about (dynamic ?) pile load tests on this site – Portuguese test field – Description of soil layers & ground investigation results : see annex.

Other possible sites : – German test site (bored piles in sand) ? (action Christian) – It would be very interesting to add a site with chalk : contact UK (action NN) – Please send the information (soil investigation + specify if SLT, DLT,…

are available) ASAP. Summary of the collected information + choice of the sites : Edinburgh ! (action

Maurice/Noël/Monika) – Deadlines :

Final programme : ECSMGE Edinburgh Sept 2015 Template general reports & key notes : Sept 2015 Bulletins : 1st bulletin mid May 2015 (action Noël) – note : the bulletin was sent end

of June ; 2nd bulletin ECSMGE Edinburgh Sept 2015 ; final bulletin early 2016. Design examples : info of possible sites available before summer holiday ;

proposition and discussion in Edinburgh ; distribution of the information of the design examples end of Oct 2015 ; answers Jan 2016

National reports : first draft mid Oct 2015 ; feedback organising committee end of Nov 2015 ; final version end 2015.

General reports and keynotes : end of March 2016.

5. Guidelines Dynamic load testing Info from Paul :

Rapid pile load testing (RLT) Standard for execution : new version ready for renewed public enquiry Interpretation : Dutch CUR guidelines are available Discussion : reliability approach must be elaborated Dynamic pile load testing (DLT) Standard for execution : composition starts now, based on RLT standard (now in public enquiry). Interpretation : described in literature, no guidelines available Discussion : reliability approach must be elaborated

Gathering existing and relevant documents/guidelines on the execution and interpretation of DLT and RLT and upload on the ETC3 website. Carlos sent already some documents about dynamic load tests. They are not yet available on the website, because we have to check copyright. ETC3 member(s) who take the lead and/or can contribute : Jaime, Panu and/or Gary, Arne, Paul, UK ?, Oswald Klingmüller (member of WG7 and convenor of the German WG on DLT).

ETC3 Meeting 11.06.2015 – Minutes p. 4/5

ETC3 Symposium = starting point for guidelines (keynote).

6. Any other business

All documents (agendas, minutes, reference documents,…) will be available on the ETC3 website : www.etc3.be

7. Next meetings

Face to face meeting : Wednesday 16th Sept 2015, 14.00 – 17.00 in Edinburgh, meeting room Carrick 1&2. Check possibility of webex meeting for those who won’t be present in Edinburgh

(action Noël).

ETC3 Meeting 11.06.2015 – Minutes p. 5/5

ANNEX

ETC3 – Piles 11.06.2015

AGENDA

1. Minutes of the previous meeting of 21.04.2015 + Actions

2. ETC3 membership : actual situation

3. ETC3 website

4. International Symposium

5. Test field data – design exercices

6. Guidelines dynamic load testing

7. Any other business

8. Next meeting

ETC3 - Piles

1. Minutes of the previous meeting

Webex meeting 21.04.2015

Actions : see minutes

2. Members & Liaisons Country Members period 2013-2017 E-mail

AUSTRIA Robert HOFMANN hofmann.geotechnik@aon.atMaurice BOTTIAU (chair) maurice.bottiau@ffgb.beNoël HUYBRECHTS (secr.) nh@bbri.be

BULGARIA Chavdar KOLEV ch_kolev@abv.bg CZECH REPUBLIC Jan KOS jankos@fsv.cvut.czDENMARK Ole MøLLER nom@aarsleff.comESTONIA Mait METS mait.mets@gmail.comFINLAND Panu TOLLA Panu.tolla@fta.fi

Sébastien BURLON sebastien.burlon@ifsttar.frAlain LE KOUBY Alain.lekouby@ifsttar.frJean-Paul VOLCKE jp.volcke@franki.fayat.com

GERMANY Christian MOORMANN christian@moormann-geotechnik.deHUNGARY Jozsef PUSZTAI pusztai@fugro.hu IRELAND Ken GAVIN kenneth.gavin@ucd.ieITALY Alessandro MANDOLINI alessandro.mandolini@unina2.it

Ruud STOEVELAAR Ruud.Stoevelaar@deltares.nl to be confirmedPaul HOELSCHER Paul.Hoelscher@deltares.nl to be confirmed

NORWAY Arne SIMONSEN arne.schram.simonsen@multiconsult.noPOLAND Kazimierz GWIZDALA kgwiz@pg.gda.plPORTUGAL Jaime SANTOS jaime.santos@ist.utl.ptRUSSIA Andrey PONOMARYOV andreypab@mail.ru

Leoncio PRIETO lprieto@rodiokronsa.esCarlos FERNANDEZ-TADEO carlos@fernandeztadeo.com

SWEDEN Gary AXELSSON gary.axelsson@elu.seUNITED KINGDOM Melvin ENGLAND melvin@loadtest.com to be confirmed

Josif JOSIFOVSKI jjosifovski@gf.ukim.edu.mk

BELGIUM

FRANCE

THE NETHERLANDS

SPAIN

FORMER YUGOSLAV REPUBLIC OF MACEDONIA

ETC 10 Trevor ORR torr@tcd.ie CEN TC 250/SC 7 Andrew BOND andrew.bond@geocentrix.co.ukCEN TC 250/SC 7/WG 1/EG 7 Christian MOORMANN christian@moormann-geotechnik.deCEN TC 288 Christian GILBERT cgilbert@systra.comCEN TC341/ISO TC 182 John POWELL jpowell@geolabs.co.uk

LIASONS

NOT YET REPRESENTED :

ALBANIA GREECE SERBIABELARUS ICELAND SLOVENIABOSNIA HERZEGOVINA ISRAEL SWITSERLANDCROATIA LATVIA TURKEYSLOVAKIA LITHUANIA UKRAINEGEORGIA ROMANIA

2. Members & Liaisons

+ITC 212 Alessandro Mandolini

3. Website www.ETC3.be Under construction

3. Website

Will be online together with 1st Bulletin of the International Symposium

3. Website

4. International symposium Design of Piles in Europe

How did Eurocode 7 change daily practice?

International Symposium28 and 29 April 2016, Leuven, Belgium

• Venue : Park Inn by Radisson, Leuven

• International Advisory Committee : • ETC3 Members & Liaisons • A. Gens : accepted, but apologised for the symposium • R. Frank : accepted and will be present • F. De Cock : accepted and will be present

• A. Bond (CEN TC 250 SC7), C. Gilbert (CEN TC 288) and J. Powell (CEN TC 341) will be

present

• 1st Bulletin : remarks ?

4. International symposium

4. International symposium

4. International symposium

National Reports

• Adapted template has been distributed by mail 22.05.2015 (see next slide) Header is adapted new adapted version !

• National representatives ETC3 : organisation of the elaboration of the national report

• Deadlines :

• First draft : Mid-October 2015 • Feedback by organising Committee : End of November 2015 • Final version : End 2015

4. International symposium

National Reports

4. International symposium

National Reports

4. International symposium

General thematic reports based on the analysis of the national reports Keynote lectures : important collaboration/interaction with European standardization process! 1 keynote based on design examples – interaction with ETC10 template of general reports & key notes will be elaborated

Programme

Wednesday 27/04/2016

4. International symposium Thursday 28/04/2016

R. Frank, President of ISSMGE

17.00 – 17.30 : Debate

4. International symposium Friday 29/04/2016

Changes : see minutes of the meeting

5. Design examples

Selecting 2 to 3 sites :

• that cover a typical North European, UK-Central/Eastern Europe and South European subsoil profile

• Preferably extensive ground investigation results : CPT, SPT, PMT, lab tests

• Preferably with pile load test results Information received : • Central Europe : 2 sites in Belgium (Monika), 1 site in France (Alain) • Scandinavia : 1 site in Sweden (Gary)

German test site ? Portugese test field ? Specific type of soils like chalk ?

Proposal 1 : Tertiary Sand - BBRI, Limelette (B) 0.00 m – 1.00 m : fill 1.00 m – 6.00 m : loam (silt) 6.00 m – 8.50 m : sandy clay/clayey sand 8.50 m - … : tertiary sand Ground water at large depth (45 m) 3 CPT ] 2 Menard PMT ] surface 36 m x 18 m 3 borings with SPT ] 1 boring with undisturbed soil sampling at several depths + lab test : centrally 12 SLT

5. Design examples

Proposal 1 : Tertiary Sand - BBRI, Limelette (B) PMT CPT SPT

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 3001

23

45

67

89

1011

1213

141516

1718

1920

2122

2324

2526

2728

2930

Depth (m

)

CPTE A1 - Limelette qc(MPa)

024681012141618202224262830

Friction Ratio Rf (%)

qc Rf

Fill

Loam (Silt)

Sandy Clay

Sand11.0 m

8.7 m

6.0 m

1.0 m

Limelette : PMT-1bis

0123456789

101112131415161718192021222324252627282930

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0

Pressures pf and pl (MPa)

Dep

th (m

)

pfpl

SPT 1, 2, & 3 Limelette

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

0 5 10 15 20 25 30 35 40

N-values

Dep

th (m

)

5. Design examples

Proposal 1 : Tertiary Sand - BBRI, Limelette (B)

Table 1 - Physical characteristics of the soil at Limelette.Sample depth

Characteristic 4.00 m – 4.50 m 7.00 m – 750 m 10.00 m – 10.50 md (kN/m³) 16.4 18.4 13.8n (kN/m³) 18.8 20.8 15.0

w (%) 14.8 12.9 9.0Sr (%) 67.6 82.3 27.0wL (%) 27.6 30.2 23.4wP (%) 18.7 15.0 20.7IP (%) 8.9 15.2 2.7

Table 2 - Results of triaxial tests.CU*-triaxial test CD*-triaxial test

Depth sampling ' (°) c' (kPa) ' (°) c' (kPa)4.00 m - 4.50 m 34 0 35 07.00 m – 7.50 m 34 0 - -10.00 m - 10.50 m 34 0 35 0

*CU : Consolidated – undrainedCD : Consolidated - drained

5. Design examples

Proposal 2 : Tertiary OC Clay - Sint-Katelijne-Waver (B) 0.00 m – 1.00 m : fill 1.00 m - … : tertiary OC stiff clay Ground water at 1 m depth 3 CPT ] 2 Menard PMT ] surface 36 m x 18 m 2 borings with SPT ] 1 boring with undisturbed soil sampling at several depths + lab test : centrally 12 SLT

5. Design examples

Proposal 2 : Tertiary OC Clay - Sint-Katelijne-Waver (B) PMT CPT SPT

0 2 4 6 8 10 12 14 16 18 20 22 240

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Depth (m

)

ETC 3 - example 4 - CPT EA1

qc (Mpa)

024681012141618202224

Friction Ratio Rf (%)

Stiff Clay

Fill

qc Rf

5. Design examples

Proposal 2 : Tertiary OC Clay - Sint-Katelijne-Waver (B)

Table 1 - Physical characteristics of the soil at Sint-Katelijne-WaverSample depth

Characteristic 4.50 m – 4.90 m 8.50 m – 8.90 m 10.50 m – 10.90 m 13.50 m – 13.90 md (kN/m³) 15.7 15.3 15.5 15.4n (kN/m³) 19.7 19.3 19.5 19.4

w (%) 25.3 26.0 25.8 26.1Sr (%) (101.8) 99.2 (100.9) (101.0)wL (%) 72.2 65.1 75.9 71.8wP (%) 25.4 25.3 26.2 26.0IP (%) 46.8 39.9 49.7 45.8

Table 2 - Results of triaxial tests.CU*-triaxial test UU*-triaxial test

Depth sampling ' (°) c' (kPa) Cu (kPa)4.00 m - 4.90 m 26 20 888.50 m – 8.90 m 28 30 12910.50 m – 10.90 m 26 40 15813.50 m – 13.90 m 27 15 188

*CU : consolidated – undrainedUU : not consolidated - undrained

5. Design examples

Proposal 3 : Stiff/soft Clay – Sweden (bridge abutments)

Typical soil profile for the middle of Sweden in an urban area : • Fill (mostly sand and gravel) • Stiff clay (dry clay over the groundwater table) • NC very soft clay (cu,min = 9 kPa ; as low as 5 kPa can be found in Stockholm area • Hard till (very dense moraine). Extremly compacted friction material. • Crystalline rock (often granite or gneiss, often with qu = 150-250 MPa)

Soil investigation : • soil sampling (Kv). Laboratory: fall cone test for cu and other soil parameters

(sensitivity, density, water content) . • vane shear test (Vb) • soil-rock probing test (JB2 or JB-tot) • weight sounding (Vim) • ground-water stand pipe well (not shown in this section)

Pile load tests ?

5. Design examples

Proposal 3 : Stiff/soft Clay – Sweden (bridge abutments)

5. Design examples

Proposal 4 : Sand – France

5. Design examples

Proposal 4 : Sand – France

5. Design examples

Proposal 4 : Sand – France

5. Design examples

Pile characteristics : • Pile type(s) ? • Pile shaft diameter, pile base diameter, pile length ? Determination of the pile capacity : • Single pile / pile group ? • Compression / tension ? • Characteristic value / design value ? • ULS / SLS ? • Check structural capacity ?

Single pile, axially loaded under compression ULS & SLS Only bearing capacity Characteristic & design value

5. Design examples

National report – deadlines First draft : Mid-October 2015 Feedback by organizing Committee : End of November 2015 Final version : End 2015 Design examples – deadlines Information available : Mid-October 2015 ? Feed back : End of January 2016 ? General Reports & Keynotes Deadline: End of March 2016

6. Guidelines DLT

Collection of relevant data on website Guidelines to be seen as an action/keynote at the ETC3-Symposium

7. Any other business

8. Next meeting

ECSMGE Edinburgh, Wednesday 16 September 2015 Meeting Room : Carrick 1 & 2 14:00 – 17:00 hrs