Stability Analysis of Red Clay Slope Under Rainfall Condition

Abstract

In order to clarify the failure mechanism of red clay slope under rainfall conditions, the stability of red clay slope under rainfall was studied by indoor model test and numerical simulation. To promote the situation, slope evolution, pore water pressure, shear stress and the research contents include the change of wetting front and the relationship between safety factor and rainfall duration. The results show that with the advance of rainfall duration, the advancing velocity of wetting front decreases gradually, which is inversely proportional to the rainfall duration. After the rain started, the slope of negative pore water pressure contour bending on the slope, and then gradually to the slope body forward, change curve of pore water pressure with depth is V, the pore water pressure of the slope is larger than the pore water pressure variation of the slope. The whole process of rainfall slope local damage, the foot to the plastic deformation, the slope in the upper part of the development, there is no obvious sliding surface and safety coefficient decreased with rainfall duration in advance, in the initial stage of the rainfall decreased rapidly, finally tends to be stable. The safety factor is greater than 1.25, and the whole slope is stable.