Research on the Numerical Simulation Analysis of Slope Stability under Rainfall Infiltration

Based on the FLAC3D software, this paper is devoted to researching the numerical simulation analysis of slope stability under rainfall infiltration. Based on the shear strength and seepage of unsaturated soils, it should add matric suction and soil-water characteristic curve to FLAC3D. So, in this way, FLAC3D can be applied to the field of saturated-unsaturated seepage. Simulation analysis of the seepage of the slope and the change of security variation in the condition of rainfall can be done. It achieved the hazardous area of slope after rainfall and put forward the concept of "small slip failure occurred in the toe of slope". And in this paper, the relationship between coefficient of permeability, rainfall duration, rainfall intensity, slope height, slope and slope stability after the rainfall was researched by the written procedures 1. This paper provides a basis for stability analysis of unsaturated soil slopes under rainfall infiltration.