Centrifuge modelling of the base response of closed-ended jacked piles
Centrifuge modelling of the base response of closed-ended jacked piles
Pile jacking techniques use static load to install pre-formed displacement piles without the noise and vibration associated with dynamic methods. To quantify the axial base response of displacement piles jacked into sand, the pile jacking process has been faithfully replicated in a geotechnical centrifuge. Six pile installations and companion load tests are reported. The tests are shown to be highly repeatable, with a lateral COV of penetration resistance an order of magnitude less than that for typical field test sites. The non-linear base response of jacked piles is shown to be well modelled by a parabola, for use in 't-z' type analysis of pile response. The elastic solution for a rigid punch is used to link the base response to the operative soil shear modulus during loading. This parabolic model combined with the seismic CPT parameters G0 and qc, allows the initial stiffness, stiffness degradation and capacity at failure of the base response to be predicted.
241-251
Deeks, A.D.
edd984b6-a70e-4575-8c6d-f9d52bb33380
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
2007
Deeks, A.D.
edd984b6-a70e-4575-8c6d-f9d52bb33380
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Deeks, A.D. and White, D.J.
(2007)
Centrifuge modelling of the base response of closed-ended jacked piles.
Kikuchi, Yoshiaki, Otani, Jun, Kimuri, Makoto and Morikawa, Yoshiyuki
(eds.)
In Advances in Deep Foundations: International Workshop on Recent Advances of Deep Foundations (IWDPF07) 1–2 February 2007, Port and Airport Research Institute, Yokosuka, Japan.
CRC Press.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Pile jacking techniques use static load to install pre-formed displacement piles without the noise and vibration associated with dynamic methods. To quantify the axial base response of displacement piles jacked into sand, the pile jacking process has been faithfully replicated in a geotechnical centrifuge. Six pile installations and companion load tests are reported. The tests are shown to be highly repeatable, with a lateral COV of penetration resistance an order of magnitude less than that for typical field test sites. The non-linear base response of jacked piles is shown to be well modelled by a parabola, for use in 't-z' type analysis of pile response. The elastic solution for a rigid punch is used to link the base response to the operative soil shear modulus during loading. This parabolic model combined with the seismic CPT parameters G0 and qc, allows the initial stiffness, stiffness degradation and capacity at failure of the base response to be predicted.
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Published date: 2007
Venue - Dates:
International Workshop on Recent Advances of Deep Foundations, IWDPF07, , Yokosuka, Japan, 2007-02-01 - 2007-02-02
Identifiers
Local EPrints ID: 419854
URI: http://eprints.soton.ac.uk/id/eprint/419854
PURE UUID: e0a47fb7-3e56-47f6-a2e8-432eba88c863
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Date deposited: 23 Apr 2018 16:30
Last modified: 28 Feb 2024 03:01
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Contributors
Author:
A.D. Deeks
Editor:
Yoshiaki Kikuchi
Editor:
Jun Otani
Editor:
Makoto Kimuri
Editor:
Yoshiyuki Morikawa
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