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Finite Element Modelling of Landslides

ABSTRACT This paper presents a numerical model used to study the initiation phase of landslides. A coupled displacement-pore pressure formulation is used to represent the solid skeleton and pore fluid interaction. The system of PDE's obtained is discretised using the finite element method and solved with non linear algorithms. Particular attention is paid to capture of the failure surface where strain localizes. An example is presented where the triggering mechanism is the pore pressure changes induced by rainfall. Another failure mechanism wich involves a much larger mass of soil is considered studying the case of the liquefaction of a sand slope induced by an earthquake.