Abstract:Based on the case of the left bank slope of Jinghu pump station in Dongjiang-Shenzhen water supply remaking project, the factors influencing the slope stability are analyzed. The main causes of slope sliding are the soft rock strata in the slope and the large precipitation in this area. The water permeates into the slope body during the rain and can not be drained away quickly enough,so it concentrates under the concrete cover,and the rock is softened by it. Therefore,the safety factor of the slope decreases,and the slope begins sliding. Based on calculation of the stress, strain, and destruction approaching degree of the slope with the linear-elastic finite element method and Mohr-Coulomb yield criterion,a conclusion can be drawn that the slope in natural condition is basically safe,but,when the depth of the rainfall permeation increases,the destruction approaching degree near the slope surface increases,and the area of destruction increases gradually. The slope will develop from partial sliding to whole sliding.