Centrifuge investigation of the lateral response of pile groups in sand

D. Ghosh Roy, M. F. Bransby, G. J. Yun

Research output: Contribution to journalConference article

Abstract

Centrifuge model tests have been conducted on pile groups in loose sand to investigate their response to lateral loads. The behaviour of two different model pile groups and one single pile in loose sand were investigated in a series of centrifuge model tests. The model pile groups were installed and then horizontal load was applied using a horizontal actuator at 100g. Two of the piles in each of the pile groups as well as the single pile were strain gauged to measure the bending moment distribution. Initial investigation focussed on the lateral displacements and the rotations of the pile groups and the bending moment. These showed how the pile group shared the load between the front and back row. Manipulation of the bending moment data allowed p-y curves to be obtained for different depths for each of the piles. These p-y curves are presented for the two pile group spacings and are compared to the results from the single pile to deduce the group interaction effects. The results show that although the group p-y curves were softer, the pile group response was stiffer than the single pile response due to complex pile group interaction effects.

Original languageEnglish
Pages (from-to)451-458
Number of pages8
JournalProceedings of the International Offshore and Polar Engineering Conference
Publication statusPublished - 1 Dec 2004
Externally publishedYes
EventThe Fourteenth International Offshore and Polar Engineering Conference - ISOPE 2004 - Toulon, France
Duration: 23 May 200428 May 2004

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