Imperial College London
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ProfessorRichardJardine

Faculty of Engineering, Department of Civil and Environmental Engineering

Proconsul and Professor of Geomechanics
 
 
 
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Contact

 

+44 (0)20 7594 6083r.jardine CV

 
 
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Assistant

 

Ms Sue Feller +44 (0)20 7594 6077

 
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Location

 

532Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Cathie:2022:10.5281/zenodo.7148625,
author = {Cathie, D and Jardine, RICHARD and Silvano, R and Kontoe, S and Schroeder, F},
doi = {10.5281/zenodo.7148625},
title = {Pile setup in sand – the "PAGE" joint industry project},
url = {http://dx.doi.org/10.5281/zenodo.7148625},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The reliability of long-term axial capacity predictions for large, offshore-scale, piles is uncertain. Current databases of static load tests include very few entries with diameters ≥ 1m, and none >2m. Also, most of the available tests were conducted at relatively early ages after driving. The PAGE Joint Industry Project addressed this knowledge gap by collating and analysing dynamic driving data from 25 offshore piles with 1.6 to 3.4m outside diameters and contrasting these with dynamic re-strike tests conducted between 1h and 1 year after driving. Systematic signal matching was performed with two independent codes that applied different soil models and the outcomes were compared with predictions from modern CPT-based static capacity design methods. Additional supporting analyses were performed on other piles, where static and dynamic tests had been conducted, to help assess the relationships between statically and dynamically measured resistances. Piles with 0.3 to 3.5m outside diameters followed broadly common trends overthe first 30 days after driving, with shaft capacities approximately doubling. While smaller (<1m) diameter piles driven at onshore/nearshore sites display marked further capacity growth, larger offshore piles showed little additionalcapacity gain after 30 days. The CPT-based Unified offshore pile design method offered conservative predictions for long-term shaft resistance, while no bias was apparent with the ICP-05 approach. An inverse relationship was identified between long-term shaft setup and diameter, which is ascribed to enhanced dilatancy applying at the pile-sand interface. The base capacities interpreted from dynamic analyses consistently fell far below the monotonic loading capacities predicted by current design methods and showed no significant trend to increase over time.
AU  - Cathie,D
AU  - Jardine,RICHARD
AU  - Silvano,R
AU  - Kontoe,S
AU  - Schroeder,F
DO  - 10.5281/zenodo.7148625
PY  - 2022///
TI  - Pile setup in sand – the "PAGE" joint industry project
UR  - http://dx.doi.org/10.5281/zenodo.7148625
UR  - http://hdl.handle.net/10044/1/101475
ER  -
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