ABSTRACT
The numerical modeling of landslide behaviour requires a constitutive model for the ground and the definition of an initial state of stresses. This paper describes the use of various testing methods to evaluate the state of stresses within a natural unstable slope. The selected site has been studied for more than fifteen years: displacements of the sliding mass, pore pressures and rainfall amount have been regularly measured. Self-boring pressuremeter tests, dilatometer tests and hydraulic fracturing tests were performed. Total pressure cells were also installed and strain controlled triaxial tests were carried out. The results are presented and discussed in this paper. Numerical analyses of deformations of the landslide have been conducted using a porous media model. The mechanical behaviour has been correctly back predicted using a two dimensional finite element procedure.
