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

Barry M. Lehane, Zhongqiang Liu, Eduardo Bittar, Farrokh Nadim, Suzanne Lacasse, Richard Jardine, Pasquale Carotenuto, Mike Rattley, Kenneth Gavin, More Authors

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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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.
Original languageEnglish
Title of host publicationProceedings Fourth International Symposium on Frontiers in Offshore Geotechnics
EditorsZack Westgate
Pages462-477
Number of pages16
Publication statusPublished - 2020
Event4th International Symposium on Frontiers in Offshore Geotechnics (postponed) - Austin, United States
Duration: 8 Nov 202111 Nov 2021
https://www.isfog2020.org/

Conference

Conference4th International Symposium on Frontiers in Offshore Geotechnics (postponed)
Abbreviated titleISFOG 2020
CountryUnited States
CityAustin
Period8/11/2111/11/21
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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