Abstract
The strength parameters of slip layers clay of landslide have been investigated by shear tests. The strength parameters differ from the drainage condition in shear test. It was shown that the movement of landslide was generally dominated by the effective stress. The effective angle of shear resistance was not changed by the remolding. The characteristics of residual strength by the method of shear test were investigated. The minimum residual strength was obtained by the ring shear test. The shearing characteristics between clay and base rock were experimented with the slice shear in triaxial cell. It was clarified that the angle of shear resistance between clay and base rock depend on the roughness of the base rock.
