Stability analysis of slopes using the finite element method and limiting equilibrium approach

The limit equilibrium method is commonly used for slope stability analysis, being relatively simple compared with finite element analysis. Both methods were used to analyse homogeneous and inhomogeneous slopes, taking into account the rapid drawdown condition, the undrained clay soils and the presence of tension cracks. The analyses were carried out using PLAXIS 8.0 (finite element method) and SAS-MCT 4.0 (limit equilibrium approach). The safety factor and location of the critical slip surface obtained from the two methods are compared.