The FEM Analysis of Chengguan District Slope in Lanzhou for Slope Treatment and Design

Combined with geological hazard treating engineering of Chengguan district slope in Lanzhou, the shear strength parameters of the slope were obtained by FEM back-analysis of two typical sections. Based on trimming and maintaining condition, the FEM model was built to analyze the slope stability under three working conditions. According to the strain of the plastic zone and the deformation of the plastic penetration area of the unreinforced slope, the anchor length and the reinforcement scheme were determined for penetrating and fixing the plastic zone. Through the reinforced slope calculation and analysis, it was verified that the stability and reinforcement effect of the scheme meets the engineering requirements. The FEM back-analysis results reveals that it is a simple and reliable way for providing the basis for slope treatment and reinforcement.