An Investigation of the Contribution of the Pile Base to the Lateral Response of Monopiles in Sand under Static Loading

H. Wang, Barry Lehane, M. F. Bransby, L. Z. Wang, Y. Hong

Research output: Chapter in Book/Conference paperConference paper

Abstract

Large-diameter monopiles with small length to diameter ratios (i.e. short stubby piles) demonstrate a rigid pile response with large movement of the pile base. This base response provides added resistance that is absent in the case of flexible piles. To examine the relative influence of the base resistance, this paper describes results from lateral tests conducted on 457 mm diameter instrumented pipe piles with a length of 1.0 m (i.e. length to diameter ratio of 2.2) at a sand site in Perth, Western Australia. The influence of the base condition on pile lateral behaviour was investigated explicitly by comparing the response of pipe piles with and without the sand plug removed. These tests clearly show that the base makes only a negligible contribution to the piles’ load-deflection response. To verify the general applicability of the conclusion, 3D Finite Element (FE) analyses were performed that first replicated the Perth field tests and then extended the study to typical monopile diameter dimensions of 6, 8 and 10 m. These analyses confirmed the finding of the field tests and further demonstrated that the pile base resistance was not significant for the lateral response of short stubby piles in sand
Original languageEnglish
Title of host publicationProceedings of the 4th International Symposium on Frontiers in Offshore Geotechnics
Place of PublicationHawthorne, NJ
PublisherDeep Foundations Institute
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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