Heavy rainfall can lead to shallow slips on slopes which are often initially in astate of partial water saturation. A multiphysics approach and advanced constitutivemodeling are necessary to take into account the physical key processes in partiallysaturated soils during rainfall events, such as water flow through the solid matrix, soilwater retention behavior and the effects of matric suction on the mechanical behavior.The elasto-plastic constitutive model ACMEG-s that includes an elasto-plastic waterretention model with wetting-drying hysteresis is used in the framework of finiteelement modeling for the assessment of destabilizing, transient processes in a steepslope during rain infiltration. It is shown that at the onset of failure, wetting porecollapse and plastic shear strains occur in the lower part of the slope and developupwards towards the slope surface to delimit a probable failure mechanism.
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