Three dimensional numerical modelling of discrete piles used to stabilise landslides
Three dimensional numerical modelling of discrete piles used to stabilise landslides
Three dimensional finite difference analyses have been carried out to investigate the behaviour of a single pile used to stabilise a slipping mass of soil, by embedment into a stable stratum. Analyses were initially carried out to determine the reduction in the limiting pile-soil lateral pressure, pu, close to the unconfined ground surface. The analyses then explore the failure mechanisms for landslide stabilising piles categorised by Viggiani. The effects of varying the strength of the slip plane interface between the sliding and stable strata, and of a sloping ground surface on the behaviour of the pile are then investigated. The results from numerical models with a rigid pile, a distinct plane of sliding and a horizontal ground surface, as assumed by Viggiani, agree closely with his theoretical solutions. Lower values of pu close to the ground surface and adjacent to the sliding plane are found to reduce the maximum shear resistance that piles can provide to the slipping mass, when compared with Viggiani’s theoretical solutions. The further analyses show that the strength of the slip plane interface has a considerable influence on pile behaviour, and that the slope of the ground surface is only significant above a certain angle.
slope stability, slope stabilization, finite element analysis, laterally loaded piles, pile–soil interaction, undrained
1393-1411
Kanagasabai, S.
2df35f1b-f815-475e-a56c-70caddb28055
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
September 2011
Kanagasabai, S.
2df35f1b-f815-475e-a56c-70caddb28055
Smethurst, J.A.
8f30880b-af07-4cc5-a0fe-a73f3dc30ab5
Powrie, W.
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Kanagasabai, S., Smethurst, J.A. and Powrie, W.
(2011)
Three dimensional numerical modelling of discrete piles used to stabilise landslides.
Canadian Geotechnical Journal, 48 (9), .
(doi:10.1139/t11-046).
Abstract
Three dimensional finite difference analyses have been carried out to investigate the behaviour of a single pile used to stabilise a slipping mass of soil, by embedment into a stable stratum. Analyses were initially carried out to determine the reduction in the limiting pile-soil lateral pressure, pu, close to the unconfined ground surface. The analyses then explore the failure mechanisms for landslide stabilising piles categorised by Viggiani. The effects of varying the strength of the slip plane interface between the sliding and stable strata, and of a sloping ground surface on the behaviour of the pile are then investigated. The results from numerical models with a rigid pile, a distinct plane of sliding and a horizontal ground surface, as assumed by Viggiani, agree closely with his theoretical solutions. Lower values of pu close to the ground surface and adjacent to the sliding plane are found to reduce the maximum shear resistance that piles can provide to the slipping mass, when compared with Viggiani’s theoretical solutions. The further analyses show that the strength of the slip plane interface has a considerable influence on pile behaviour, and that the slope of the ground surface is only significant above a certain angle.
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e-pub ahead of print date: 1 September 2011
Published date: September 2011
Keywords:
slope stability, slope stabilization, finite element analysis, laterally loaded piles, pile–soil interaction, undrained
Organisations:
Infrastructure Group, Civil Engineering & the Environment
Identifiers
Local EPrints ID: 76129
URI: http://eprints.soton.ac.uk/id/eprint/76129
ISSN: 0008-3674
PURE UUID: a4de5dba-67b0-452f-9cf1-5010dfeea8bb
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Date deposited: 11 Mar 2010
Last modified: 12 Aug 2024 01:36
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Author:
S. Kanagasabai
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