Study on the Deformation and Evolution Mechanism of Soil-Rock-Mixture Slope under Excavation Disturbance

In recent years, with the construction of the freeways, large-scale hydro projects and deep foundation pit projects, project accidents aroused by people's excavation are more and more outstanding, especially in the western of China, which surface is most covered by soil-rock-mixture slope, the human project activity has already become the main induced factor of the geologic hazard. Based on in-situ simulation experiment of excavation and 3D finite element method numerical simulation, the deformation and evolution mechanism of soil-rock-mixture landslide under excavation disturbance was studied. The study results show that stability and displacement field of soil-rock-mixture slope are obviously influenced by excavating effect, and most of soil-rock-mixture landslides caused by excavation are shallow draught slope failures.