The causes and stability prediction of Ezhai Village landslide in the upper of the Minjiang river region
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Abstract:
The Ezhai Village landslide is one of the large landslides along the upper of the Minjiang River and the Chengdu Lanzhou railway.It is very important for early identifying the geohazards and reducing the harm to explore the causes and stability prediction.On the basis of expounding the geological background and development characteristics of the landslide,this study analyzes its genetic mechanism and evolution process,and investigates the mechanism of landslide accumulation stability and deformation damage by engineering geological analysis,quantitative calculation and numerical simulation.The results show that the Ezhai Village landslide is a large rock landslide with 739×10 4 m 3 volume,and an old push down landslide induced by rainfall.It has been through four stages:deformation and crack by tension,crack penetration,push down and stagnation accumulation.The formation of the landslide is related to the steep terrain condition,the type of broken rock and soil,and the type of slope structure.It is also closely related to the active fault and the strong earthquake,induced by rainfall.The Ezhai Village landslide is stable now as a whole but is not stable at local scale,which implies that it may be unstable in some areas under heavy rainfall or earthquake conditions.
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