Analysis Of Stability And Study Of Control Measures Of Luanshigang Reservoir Landslide In Ya’an Sichuan

Luanshigang reservoir landslide located at new county construction and planning area of Han Yuan county Si Chuan province is one part of the old landslide, which is in stable condition now. But with the progress of settlement project and reservoir of Pubugou hydropower station, human activities on the landslide body are increasingly intensifying, plus up the influence of water level rise impact on the slope, it is possible that the landslide further development. If the stability of landslide is destroyed,it will affect the landslide on the personal and property safety of residents, the new county construction and normal operation of hydropower station. Therefore, it is very important to analysis the stability and effectively prevent the occurrence of the landslide.By analyzing the existing geological data, this paper probe the influencing factor and reasons of the landslide,the stability of Luanshigang reservoir landslide is studied by the transfer coefficient method and the Fast Lagrangian difference method based on shear strength reduction, based on which the treatment measures is presented. Furthermore,the selected treatment measures is numerically investigated by means of the FLAC^3D based on shear strength reduction. The main works and achievements obtained in this paper are as follows:1、Based on the analyses on the geological data of Luanshigang reservoir landslide,the configuration and characteristics of the landslide are obtained,and in turn the influence factors on the landslide are discovered;2、The results of stability calculation and simulation indicate that the whole landslide is in stable condition, but the local that has low safety factor and lies in basically stable need to reinforcement in nature state. The whole landslide lies in under-stable condition and need to treatment. 3、According to usually measures of control landslide, this paper raise measures that put prevention first with monitoring and warning, compose of surface drainage, slope surface protection and anti-slide pile. And paper carries out the design of anti-slide pile and reinforcement calculation, then certifies the feasibility of the treatment measures by analyzing them.