A new 'unified' CPT-based axial pile capacity design method for driven piles in sand

Barry Lehane, Z. Liu, Eduardo Bittar, Farrokh Nadim, S. Lacasse, R.J. Jardine, Pasquale Carotenuto, P. Jeanjean, M. Rattley, K. Gavin, Jan Haavik, Neil Morgan

Research output: Chapter in Book/Conference paperConference paper

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 of the 4th International Symposium on Frontiers in Offshore Geotechnics
Place of PublicationUSA
PublisherAmerican Society of Civil Engineers
Pages463-477
Publication statusPublished - 2020
Event4th International Symposium on Frontiers in Offshore Geotechnics - Austin, United States
Duration: 8 Nov 202011 Nov 2020
Conference number: 4
https://www.isfog2020.org/proceedings

Conference

Conference4th International Symposium on Frontiers in Offshore Geotechnics
Abbreviated titleISFOG 2020
CountryUnited States
CityAustin
Period8/11/2011/11/20
Internet address

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