Numerical Limit Equilibrium Analysis Method of Slope Stability Based on Particle Swarm Optimization

The limit equilibrium method based on the results of numerical calculation is an important method for slope stability analysis. In this paper, PSO is used to control the locations of trailing edge and shear outlet, while the progressive approach method is used to control the radius of slope sliding surface. It achieves the location search of the potential sliding surface as well as the calculation of the corresponding safety factor. So the minimum safety factor and the location of the most dangerous potential sliding surface are determined. Taking a slope section plane of Xiluodu Hydropower Station as an example, the most dangerous sliding surface having been searched out is compared with the results of field surveys. It shows that the results of the proposed method are in good agreement with the actual engineering, and the validity and the correctness of the approach are also verified.