![]() ![]() ![]() The high water sensitivity and low permeability of fine grained soil play an important role in the re-deformation of deposits slope. The first slip deformation is greatly affected by the buoyancy weight-reducing effect, and the permeability of soil and variation in the water level are the factors controlling slope deformation initiation. The results indicate that the deformation of the large-scale composite deposits is a staged sliding mode during the impoundment process. Combined with numerical simulation, the failure mechanism of the composite deposits during reservoir water level variations was studied. Taking large-scale composite deposits located on the Lancang River in Southwest China as a study case, the origin of the deposits was analyzed based on the field investigation and a multi-material model was established in the physical model test. Reservoir landslides greatly threaten the safety of reservoir area. The failure of slope caused by variations in water levels on both banks of reservoirs is common. ![]()
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