Analysis of Failure Behavior Based on the Ring Shear Test in a Bedding Rock Landslide of the Three Gorges Reservoir

Complex geological environment and climatic conditions lead to frequent disasters in the Three Gorges Reservoir area. In particular, due impact of reservoir impoundment, a large number landslides have occurred, resulting huge economic losses casualties. this study, bedding rock landslide is taken as research object. First, DTA-138 geotechnical ring shear apparatus system used for test. Second, two-dimensional numerical model Shanshucao was established, simulation carried out. The main conclusions are follows: 1) stress–shear displacement curves sliding zone soil under different rates show typical strain softening characteristics. 2) rate–internal friction angle curve showed good logarithmic relationship. 3) fundamental reason rapid into river after instability negative rate effect argillized interlayer zone.