Analysis of the Origin Mechanism and Stability Evaluation to Some Giant Landslide in Upper Course of Yalong River

According to the analysis of some giant landslide in upper Yalong river,it belongs to the creep-sliding-bending type.At present,the landslide distortion sign is the slippery body earth creep-tension.In this foundation,the selection of safety margin obviously is lower A2 area,carried on the appraisal to it under the different conditions stability,the results indicated A2 area is better under the natural condition,could not satisfy the safety request under the rainstorm condition,the earthquake condition can be lower.