干湿交替环境下粉质粘土边坡稳定性分析

o study the stability of soil slopes in wetting-drying alternate environment, a laboratory simulation of wetting-drying cycles on silty clay slope is conducted in this paper. The law of shear strength and its parameters of silty clay varying with the number of wetting-drying cycles is investigated by triaxial compression test. Based on this, a theory for calculating safety factor of silty clay slope in wetting-drying alternate environment is derived. Then this theory and a modified instability criterion of slope are both applied in the stability analysis of a silty clay slope by numerical simulation. Its safety factor is obtained. It can supply the basic theory and provide engineering reference for the stability analysis of similar soil slope engineering.