CPT-Based Axial Capacity Design Method for Driven Piles in Clay

Barry M. Lehane*, Zhongqiang Liu, Eduardo J. Bittar, Farrokh Nadim, Suzanne Lacasse, Nezam Bozorgzadeh, Richard Jardine, Jean Christophe Ballard, Kenneth Gavin, More Authors

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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There are clear advantages in the establishment of reliable, direct cone penetration test (CPT) based methods for assessment of the axial capacity of driven piles. These advantages motivated the formation of a joint industry project (JIP) under the management of the Norwegian Geotechnical Institute (NGI), which initially led to the creation of a unified database of high-quality pile load tests in sand and clay. The unified database has the consensus approval of representatives of the profession and personnel in multiple companies from the offshore energy sector. This paper presents a component of the research from the second phase of the JIP, which had the objective of developing a new CPT-based method for driven piles in clay to unify several CPT-based methods that are in use today. First, a rational basis for the CPT-based formulation is described, using trends from instrumented pile tests; the description facilitates an understanding of the approach and illustrates its empirical nature and limitations. The unified database was used to calibrate the formulation and it led to good predictions for an independent database of pile load tests and for measured distributions of shaft friction.

Original languageEnglish
Article number04022069
Number of pages18
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number9
Publication statusPublished - 2022

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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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