Landslide Formation Mechanism And Stability Evaluation Zaoling County Town Of Taoba Highway

In the mountain area,when the high-speed way is built,the landslide is one of the most common diseaster.In the section that K141+800?K142+200 of Taoyuan-Bazhong high way,there is a landslide named Zao Linxiang landslide which is caused by excavation,and its landslide body is 8,000,000 m3.This paper will select it as the research object,and study on the geological conditions,the failure phenonmenon and the landslide mechanism,the main research results are shown in the following:(1)Collect and analysis the geological condition in this area and investigate the landslide phenonmenon and its charatcertics.And then,the geological condition is researched,and its structure model is estibilished.The relationship between the landslide phenonmon and geological condition is analysis.The results show that the bedding structural slope and the steep slide jounts are the basical geological condition.(2)Based on the physical tests,the relative parameters in the landslide area is analysis by using the analog analysis method.The numerical simulate model which are used to analysis the formation mechanism and its stability is estibilished.The analysis results show that the easily soften rock and its surface are the main factors which leads to landslide.(3)The stability befor the landslide is calculated by using the limit equilibrium method and the main factor caused the landslide are analysis,the formation process of landslide is revealed.The research results show that several step shape sliding surface is caused in the slope,and the traction type landslide is formed under the action of pore water.(4)Using the numerical simulation method and estibilishing the structural mechanical model,the stress condition and displacement condition are formed.At the same time,the development of slope is revealed,which furtherlly shows the formation mechanism of landslide.At last,the result of numerical simulation fully shows the landslide model.(5)Based on the formation conditons of landslide,landslide model and formation mechanism,the suggesttions are proposed.The results show that the slide-resistant pile and gutterway is the reasonable methods.