Numerical investigation of rainfall-induced fines migration and its influences on slope stability

摘要: Rainfall-infiltration-induced fines migration within soil slopes may alter the local porosity and hydraulic properties of soils, is known to be a possible cause failure slopes. To investigate intrinsic mechanisms, mathematical formulation capable capturing main features coupled unsaturated seepage process has been presented. Within formulation, an erodible treated as three-phase multi-species porous medium based on mixture theory; mass conservation equations with exchange terms together rate controlling erosion deposition processes are formulated governing solved by FEM method. The influences both detachment stability under rainfall infiltration have investigated numerically. results show that depending whether move out or get captured at pore constrictions, desired undesired consequences arise phenomenon. It suggested more attention should paid those susceptible internal whose safety analysis cannot predicted traditional methods.