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Investigation of the geomechanical aspects of a large landslide by means of a finite-element method: a case study
François, Bertrand; Bonnard, Christophe; Laloui, Lyesse
2008In 12th IACMAG Conference
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Keywords :
Landslide; hydro-mechanical coupling; elasto-plasticity; numerical modelling
Abstract :
[en] Using advanced geomechanical finite element modelling, it has been possible to simulate the mechanical behaviour of a large slope movement, namely the Triesenberg landslide. This slope is located along the Rhine valley in the Principality of Liechtenstein, covering an area of around 5 km2 which includes two villages. Pore water pressure fields calculated by a separated hydrogeological model were used as an input for the geomechanical model. The results obtained through 2- and 3-dimension numerical simulations agree fairly well with field measurements of peak velocity, spatial and temporal distribution of velocity and total displacements. Such results were obtained using a Modified Cam-Clay elasto-plastic constitutive model. In addition, a parametric study has been carried out to evaluate the effect of the selected friction angle and of the range of water pressure variation on the movements during a crisis period.
Disciplines :
Civil engineering
Author, co-author :
François, Bertrand  ;  Ecole Polytechnique Fédérale de Lausanne - EPFL > Soil Mechanics Laboratory
Bonnard, Christophe
Laloui, Lyesse
Language :
English
Title :
Investigation of the geomechanical aspects of a large landslide by means of a finite-element method: a case study
Publication date :
2008
Event name :
12th IACMAG Conference
Event place :
Goa, India
Main work title :
12th IACMAG Conference
Peer reviewed :
Peer reviewed
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since 03 November 2009

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