ABSTRACT
The report deals with the results of centrifuge and numerical modeling to study the response of deep retaining structures to stabilize high thickness landslides in overconsolidated clays. The particularity of the research is that the retaining structures intercept only a part of the sliding mass thickness. Its aim is to investigate the behavior of different geometries of the retaining structures, or different heights over the sliding surface, mainly to verify the development or not of new failure surfaces inside the sliding mass over the top of the stabilization structures. FLAC-2D numerical modeling was adopted to simulate laboratory soil tests results (direct shear and oedometer test) and FLAC-3D was chosen to reproduce the behavior of interfaces between sliding mass-subsoil, sliding mass-centrifuge box walls and the sliding mass-retaining structures boundaries. The paper describes the criteria adopted for FLAC-2D and FLAC-3D modeling in particular referred to the soil behavior and interfaces characterization.
