Open Access

ARTICLE

Hydro-Mechanical Modelling of a Natural Slope Affected by a Multiple Slip Surface Failure Mechanism

A. Ferrari¹, L. Laloui^1,2, Ch. Bonnard^1,3

1 Soil Mechanics Laboratory (LMS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland.
2 e-mail: lyesse.laloui@epfl.ch (corresponding author).
3 Presently independent consultant, PBBG SA, Lausanne.

Computer Modeling in Engineering & Sciences 2009, 52(3), 217-236. https://doi.org/10.3970/cmes.2009.052.217

Abstract

A coupled hydro-mechanical formulation is presented for the analysis of landslide motion during crisis episodes. The mathematical formulation is used to model a natural slope affected by a multiple slip surface failure mechanism, in which pore water pressure evolution was identified as the main cause for movement accelerations. An elasto-plastic constitutive model is adopted for the behaviour of slip surfaces. Material parameters are obtained by combining the available laboratory tests and the back analysis of some crisis episodes. After being calibrated and validated, the model is applied to improve the understanding of the physical processes involved and to predict the landslide behaviour under different possible scenarios.

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Keywords

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