A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand

Conference paper (2020)

Authors

B. M. Lehane University of Western Australia
Zhongqiang Liu Norwegian Geotechnical Institute
Eduardo Bittar University of Western Australia
Farrokh Nadim Norwegian Geotechnical Institute
Suzanne Lacasse Norwegian Geotechnical Institute
Richard Jardine Imperial College London
Pasquale Carotenuto Norwegian Geotechnical Institute
Mike Rattley Fugro N.V.
More Authors... External organisation
Copyright: © 2020 Barry M. Lehane, Zhongqiang Liu, Eduardo Bittar, Farrokh Nadim, Suzanne Lacasse, Richard Jardine, Pasquale Carotenuto, Mike Rattley, Kenneth Gavin, More Authors
More Info
expand_more

Published Date

2020

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Abstract

This paper outlines the development of a new ‘Unified’ CPT-based method for estimating the axial capacity of driven piles in sand. The method adapts key features of the four CPT-based methods currently in the API and ISO guidelines. The new method was calibrated with the Unified database of pile load tests developed as part of an earlier joint industry research project (Lehane et al. 2017). Key factors known to influence pile capacity are incorporated in the new Unified method formulation, including (i) the degree of soil displacement (plugging) during installation, (ii) the influence of relative pile tip depth, (iii) sand-pile interface friction angle, (iv) changes in radial stress during loading and (v) the influence of loading direction. It is shown that the new method provides more reliable predictions of the capacities of the pile load tests in the Unified database than any of the existing axial pile capacity design methods in the API and ISO guidelines.

Files

ISFOG_2020_CPT_Design_Method.p... (pdf)
(pdf | 0.78 Mb)
- Embargo expired in 16-02-2021
Unknown license