Study of Reservoir-Accumulative Landslide´s Stability Evolution Trend in the Three Gorges Reservoir

A large number of accumulation landslides induced by water storage in the Three Gorges reservoir, after the landslide danger happening, its stability evolutionary trend is the focus of the research, which have important sense to landslides prevention and control. This paper selects two of the accumulation landslides which has different structure, Qingshi landslide and Huanglianshu landslide, as the research object. Based on the major deformation area of the landslide changes with reservoir water fluctuation, analyzes on the soil accumulation landslides and rock accumulation landslide stability evolutionary trend was made. It is concluded that major deformation of rock mass accumulation landslide area is not affected by reservoir water fluctuation, while soil accumulation landslide response positively during the first reservoir water fluctuation process, the deformation of the disintegration region is significantly higher than the overall regional. Accumulation landslide reaches a new equilibrium after hydrology 1-2 years, and the stability to give priority to with rainfall influence.