Study on the Failure Mechanism of Slope under Rainfall by Strength Reduction FEM

摘要

Landslides always cause catastrophic disasters, and rainfall is one of the most important factors to stimulate landslides, especially for the slope with weak interlayer. Most of existed studies are aimed at the homogeneous structure of slope or the dual structure of slope. The paper was based on the unsaturated soil seepage theory, and a slope model with weak interlayer was established, and the strength reduction FEM was used to analyze the slope with weak interlayer under rainfall infiltration. During the rainfall, the variation regularity of the saturation, pore pressure, displacement, and plastic strain in the slope were revealed, and the mechanism of the buckling failure of such kind of slope was discussed. The results would have a great practical value for the prevention and treatment of landslides.