Abstract: This paper presents a case history of Banpo landslide analysis for a hydropower station site in Southwest China. The subsurface conditions and the landslide reconnaissance indicate that there two historical slides can be identified at the site. Starting from the laboratory test results, the subsurface soil shear strength parameters of the slided zone were determined by global stability analysis with limit equilibrium method by Slide software on the sliding profiles representing the original topography. Based on the back analyzed soil shear strength parameters, the global stability of the current topography was analyzed under various load combinations and conditions.

Key words: Landslide, Hazard Formation Mechanism, Shear Strength Parameters, Limit Equilibrium Method, Back Analysis