Assessment of p-y approaches to estimate the lateral response of driven and vibrated piles in sand

B. M. Lehane, H. Wang

Research output: Chapter in Book/Conference paperConference paperpeer-review

Abstract

Given the popularity of the p-y approach to model laterally loaded piles, this paper evaluates the predictive performance of six existing p-y approaches for piles in sand against a new database of lateral pile tests comprising driven and vibrated piles with a range of aspect ratios. This database includes results from a new series of lateral pile tests designed to assess the effect of installation method on lateral response. It is shown, for driven piles, that the API p-y formulation overestimates lateral stiffness significantly while predictions obtained using CPT-based p-y formulations are reasonable at large lateral pile displacements but underestimate the lateral pile head stiffness of piles with D <0.5 m by about 30%. This conservatism reduces with increasing D and increasing L/D and is such that predicted lateral stiffness values of driven piles in the database with D of 4.3 m and L/D>20 are well predicted by the CPT methods. The new series of lateral tests and other tests reported in the literature indicate that the lateral stiffness of vibrated piles in medium dense and dense sand is between 80% and 90% of that of driven piles.

Original languageEnglish
Title of host publicationOffshore Site Investigation Geotechnics 9th International Conference Proceeding
PublisherSociety for Underwater Technology
Pages1321-1327
Number of pages7
ISBN (Print)9780906940594
DOIs
Publication statusPublished - 1 Jan 2023
Event9th International Conference on Innovative Geotechnologies for Energy Transition, 2023 - London, United Kingdom
Duration: 12 Sept 202314 Sept 2023

Publication series

NameOffshore Site Investigation and Geotechnics
ISSN (Print)2754-6322

Conference

Conference9th International Conference on Innovative Geotechnologies for Energy Transition, 2023
Country/TerritoryUnited Kingdom
CityLondon
Period12/09/2314/09/23

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