Physical model testing and FE analyses of base resistance of bored piles in sand

Conference paper (2010)

Authors

David Cadogan Cork Institute of Technology
Kenneth Gavin University College Dublin
Ali Tolooiyan University College Dublin
Research Group
Geo-engineering (CEG) (TU Delft)
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Published Date

2010

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Geoscience and Engineering

Research Group

Geo-engineering

Abstract

Research efforts have improved estimates of the ultimate base resistance of driven piles in sand. These techniques often estimate the base resistance at relatively large displacements, typically 10% of pile diameter, q
b0.1. Cone Penetration Test (CPT) design methods typically link q
b0.1 and qc through a constant reduction factor, α. Although α factors for bored piles have been proposed, some authors argue α is constant and others that it varies with footing width and depth. This paper describes the results of model tests performed using instrumented piles installed in dense sand. Numerical analyses were performed using soil profiles that were calibrated using the results of the CPT tests at the site, and used to perform parametric analyses to investigate scale effects. Results imply a direct correlation between q
b0.1 and qc, independent of pile diameter and length, suggesting model-scale testing as an ideal approach for investigating the pressure-settlement response of field-scale piles.