ABSTRACT
The results of an experimental campaign of reinforcement of thin cohesive soil embankments in the case of cavity collapse are presented. In particular, the aim is to test the effectiveness of a new type of bi-stiffness geosynthetic. A coupled DEM-FEM numerical model is validated based on these results and allows a better understanding of the soil- geosynthetic interaction phenomena mobilized during the collapse. Comparison between the numerical and experimental results obtained with the two types of reinforcement (mono-stiffness and reversed bi-modulus) make it possible to underline the interest of the innovative product developed.
