基于颗粒流强度折减法的粉质粘土边坡稳定性分析

o study the method of stability analysis and calculating safety factor of silty clay slope under wetting-drying cycles，a simulation test of wetting-drying cycles on silty clay in slope is conducted in this paper. The wetting-drying degradation law of shear strength as well as shear strength parameters for silty clay have been obtained by the triaxial shear test. Besides, the wetting-drying degradation law of meso-structure parameter among silty clay particles has been get from the coupling relationship between meso-structure paremeter among particles marked by discrete element PFC (particle flow code) method and macro mechanical parameter of silty clay after wetting-drying cycles. Based on shear strength reduction with particle flow code, the calculation method of safety factor for silty clay slope under wetting-drying cycles has been concluded and the instablilty criterion of soil slope has been shown, which can be served as theoretical reasons and references for future similar engineerings.