A Slope Stability Analysis In Shaanxi And Its Anchoring Effect Evaluation

Slop is the most common natural geological environment where the human live and construct. High slope project increases more importance in China's construction with Western Development. Then geological disasters, such as landslide or the old landslide revived, caused by high slope instability, bring enormous losses to people's lives and property, which has been the main constraint to the construction as environment problems. This paper relies on high slope treatment project at a power plant, in Shanxi. Through collecting and analyzing regional geological,meteorological data and plant geological survey report, some analysis on high slope stability with numerical simulation software, FLAC, are performed. Under the natural state and sustained rainfall condition, do some research on the slope stability before excavation,after excavation and supported. The supported structures are evaluated. Then some conclusions are given below.According to numerical simulation results, the original slope remains stable. The rainfall is the factor lowering the slop stability, and the slop safety coefficient decreased. However, the slop remains stable. From the plasticity of original slop, there is some elastic yield with a little plastic yield, which accords with the rich joint development. Precipitation, especially the persistent rain, lowers the slop stability.Artificial excavation decreases the slope stability, and the plastic zone increased. Plastic flow trend appears in entire slope when raining. According to the analysis, rich faults development, raining and artificial excavation are the major factors.The displacement, plasticity of supported slope and slope safety factor both shows that the slope after support is stable, but is not very satisfactory. The relationship between cable and plasticity show design defects. After support structure optimization the anchoring effect are improved.