Effects of pile shape and pile end condition on the lateral response of displacement piles in soft clay

A series of lateral tests conducted in a centrifuge on displacement piles in kaolin is used to examine the effects of pile shape, pile end-condition and clay overconsolidation on the lateral load transfer (p–y) curves in soft clay. These experimental tests are supported by finite-element analyses, w...

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Bibliographic Details
Published in:Géotechnique 2018-09, Vol.68 (9), p.794-804
Main Authors: Truong, P., Lehane, B. M.
Format: Article
Language:eng ; fre
Subjects:
Centrifuges
Clay
Compression
Compressive strength
Displacement
H piles
Kaolin
Lateral displacement
Lateral loads
Load transfer
Mathematical models
Overconsolidation
Piles
Shape
Shape effects
Shear strength
Soft clay
Tests
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Summary:A series of lateral tests conducted in a centrifuge on displacement piles in kaolin is used to examine the effects of pile shape, pile end-condition and clay overconsolidation on the lateral load transfer (p–y) curves in soft clay. These experimental tests are supported by finite-element analyses, which examine the responses of the circular, square and H pile sections used in the centrifuge tests. The experimental and numerical results reveal an important effect of pile shape on p–y curves, but no discernible effect of the pile end condition. These results also indicate comparable dependencies of net ultimate pressures on normalised depth and undrained shear strength. The findings enable development of a new formulation for p–y curves in soft clay, which incorporates the effects of pile shape and uses the triaxial compression consolidated undrained shear strength as the reference undrained strength.
ISSN:0016-8505
1751-7656
DOI:10.1680/jgeot.16.P.291