Study on dam Slope Stability under the Condition of Rainfall

Analyze the static simulation of the dam by using the strength reduction principle, get the stress, strain and displacement distribution rule and the corresponding safety factor in the water level change and rainfall infiltration are two working conditions of the reservoir’s retaining dam body respectively, get the displacement of the slip plane when the unstable failure happens on the dam, the influence of the reservoir’s water level on the dam’s safety factor, and the influence of the rainfall infiltration on the dam’s stability; Based on fluid-solid interaction mechanics theory, a coupled mathematical model for describing the slope stability of dam under the condition of rainfall was developed. The model is used to evaluate the safety of the slope. The model simulates the effect of the slope gradient ratio and the slope angle on the slope stability under the different conditions of rainfall in the return periods. Results show that slope safety factor in the different rainfall Conditions decreases with the increase in rainfall of time. Credible provided for designing and appraising stability of the dam, based on the assessment of the effect of slope gradient ratio on the slope stability in the different rainfall conditions of the return periods.