Physical Modelling of Rainfall-Induced Sandy and Clay-Like Slope Failures

Small-scale slope modelling was performed to evaluate the failure process of a landslide triggered by artificial rainfall. The model platform 2.3 m long, 1.0 wide, and 0.5 deep used build small-scale models with same geometric conditions but different soil types/materials, including sand two sand-kaolin mixtures angle. hydraulic response under simulated rainfall monitored using volumetric water content, pore pressure, matric suction sensors installed at depths along profiles. Slope surface deformation development also monitored. This paper discusses factors affecting initiation propagation, their relationship material, infiltration process, overall resistance in related strength, effective stress, contribution unsaturated part slope. Rainfall caused increase dissipation initially partially saturated materials models, resulting decrease stresses shear which turn led occurrence movements failures. main observations arising from results conducted tests relate observed instabilities sandy clay-like slopes. test have shown that within slopes built clean occurs due groundwater level rising foot further retrogressive towards top slope, while mixtures, occur form cracks are result infiltration.