Formation Mechanism And Stability Study Of Shangtianzhen Landslide In Kala Hydropower Station

The Kala Hydroelectric power station is located the middle reaches in Yalong River MuLi Liangshan, which is the 11 level of rank 6 station in Lianghekou and Jiangkou which installed capacity of hydropower plant is 980MW. Landslides distributed in the primary election upper, middle and lower three dam sites, which is an important role on the alternate plays, and the control on the dam located on the field of landslide, then Shangtianzhen landslide is on upper dam between line up and under line, respectively distance about 500m and 400m. Therefore, it is necessary to the landslide in-depth detailed analysis of the investigation. This article depends on " Kala Hydroelectric Power Station on Feasibility study Engineering in Yalong River Dam Site Area Landslide Formation Mechanism And Stability Study" the scientific research item, to was located the dam site area the Shangtianzhen landslides to conduct the thorough careful research.This article based on the open country geological investigation and the full and accurate exploration material, the environment geological condition which saved to the Tiansan landslide taxes has carried on the thorough analysis, the discussion landslide basic characteristic.Shangtianzhen landslide divided into A and B areas in central gully for boundary according to the structure characteristics, landslide composition characteristics and landform features, and analytical judgment Shangtianzhen's mechanism is Slip- page-Bending-Dyke flexion.Based on the field on the engineering geological zoning characteristics, landslide from the morphological characteristics, material composition and structure characteristics, groundwater development characteristics, deformation and damage characteristics of the aspects of the field, the overall and local stability situation landslide a relatively accurate geological macro judgment. Key ilibrium method to calculate the whole stability of landslide partition, judge and local stability in different conditions landslide stability state, and to affects the landslide stable sensitive factor to carry on the analysis. In limit equilibrium analysis of the foundation, on the generalized geological prototype for two-dimensional numerical model, establish, according to the stress and strain analysis, stability of landslide make further judgment. Comprehensive evaluation of its stability condition, forecasts the trend of its development, for the selection of the dam will provide an important basis.