Genetic mechanisms and a stability evaluation of large landslides in Zhangjiawan, Qinghai Province

It is important to study the instability law of typical landslides understand evolution regional and for disaster prevention. This uses Zhangjiawan landslide in Xining City, Qinghai Province, as an example. Through field surveys analysis geological environmental conditions, formation mechanisms are summarized. The stability was evaluated using limit equilibrium numerical simulation methods provide theoretical support susceptibility landslide. results show that main reasons occurrence multi-grade steep gentle terrain changes, poor permeability mudstone lithology, excavation front anti-slide section, rainfall. whole deformation failure mechanism “unloading rebound-tension deformation-creep deformation.” nearly same, difference coefficients small. Under rainstorm displacement maximum shear strain increments mainly concentrated on rear edge mass, pushed, which a push-type