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

@article{Rimoy:2015:10.1680/geot.14.P.112,
author = {Rimoy, S and Silva, M and Jardine, R and Yang, ZX and Zhu, BT and Tsuha, CHC},
doi = {10.1680/geot.14.P.112},
journal = {Geotechnique},
pages = {576--589},
title = {Field and model investigations into the influence of age on axial capacity of displacement piles in silica sands},
url = {http://dx.doi.org/10.1680/geot.14.P.112},
volume = {65},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The axial capacities of piles driven in silica sands are known to grow over the months that follow installation, long after all driving-induced pore pressures have dissipated. However, there is uncertainty over the processes that govern the observed set-up and how they may vary from case to case. This paper evaluates three hypotheses against evidence from updated field test databases and laboratory investigations with highly instrumented and pressurised model piles. Potential influential factors are considered including: pile and sand particle sizes, installation style, access to free water, test conditions and external stress change cycles. Laboratory local stress measurements support the hypothesis that moderation, over time, of the extreme stress distributions developed during installation is a key contributor to capacity growth, while field tests confirm the action of enhanced dilation near the shaft. However, field and laboratory piles show paradoxically different ageing trends. The paper proposes that the fractured but compacted sand shear zone that forms around pile shafts during installation leads to set-up being far more significant with large field driven piles than in model tests.
AU  - Rimoy,S
AU  - Silva,M
AU  - Jardine,R
AU  - Yang,ZX
AU  - Zhu,BT
AU  - Tsuha,CHC
DO  - 10.1680/geot.14.P.112
EP  - 589
PY  - 2015///
SN  - 0016-8505
SP  - 576
TI  - Field and model investigations into the influence of age on axial capacity of displacement piles in silica sands
T2  - Geotechnique
UR  - http://dx.doi.org/10.1680/geot.14.P.112
VL  - 65
ER  -
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