Study of Landslides in Multilayer Soils

This paper contains an experimental study conducted in laboratory dealing with a reproduction of landslides in layered soils by shearing tests on triaxial apparatus. The samples are reconstituted with alternating layers of sand and marl, disposed in plane layers or inclined layers about 40 degree angle. The study is based primarily on a thorough visual analysis of the samples before and after failure. It allows distinguishing the failure mode of each layer. It also helps to localize the plane failure, especially in inclined layers. However, it shows the evolution of pore pressure and deviatoric stress based on nature of layers, their arrangement and inclination.