Analysis And Management Of Lower Slope Stability Under The Situation Of Rainfall Infiltration

In many geological disasters,the occurrence of landslide hazard is the highest.And landslide hazard can cause the greatest casualties and the largest economic losses.Therefore,the research on slope stability has been a very important studying topic.In the actual engineering environment,there are many factors that influence the slope stability.Including the height and angle of the slope,rock lithology and the earthquake and the rainfall and other irrational engineering activities.However,rainfall impacts the slope stability badly to the greatest extent.According to the statistics,90%of the landslides are caused by rainfall.So the research on the stability of the rainfall slope is very meaningful.Taking the slope of the Lutang village of Temple town,Pingnan County of Guangxi province as the actual engineering background,this paper analyzes the stability of the slope by numerical simulation under natural condition.On the basis of this,the paper mainly studies the influence of rainfall infiltration on the stability of landslide and the change of the landslide stability coefficient with time under the condition of 3 different rainfall intensity of 0.005m/h,0.01m/h and 0.02m/h.At the same time,under the case of ensuring that within 48 hours,the rainfall is 240mm,this paper establishes 5 common rainfall model,they are:incremental type,T type,homogeneous type,peak type and decline type.Then this paper studies the relationship of the changing of the landslide stability coefficient of the 5 rainfall models with time,then gets the rainfall capacity when the side slope is unstable.analyzed.Through analyzing the information of the slope stability coefficient and the sliding surface when the rainfall intensity of 0.02m/h which lasts 48 hours,and then combined with layer lithology,construction conditions,economic benefits and other factors,this paper puts forward treatment method of focusing on the anti slide pile and taking bolting support as the supplement.Finally,the paper tests whether the management scheme is feasible by numerical simulation method.