Study On The Formation Mechanism And Countermeasures Of Landslide At Farmers' Market In Longtoushan Township,Ludian County

Landslide is a common global distribution of sudden geological disasters,the predisposing factors are many,such as rainfall,human unreasonable engineering activities,earthquakes and so on.Human engineering activities and seismic factors have become the important factor inducing landslides.In recent years,with the economic development,population growth,human demand for resources and living space continues to expand,to promote the various types of engineering activities on the geological environment of the disturbance continues to increase,coupled with frequent earthquakes,resulting in landslide disasters occur more and more High,caused by the loss of life,property also continue to increase.Today,landslides have become one of the three major natural disasters in the world.Therefore,it is of great social significance to master the formation mechanism of landslide under the factors of human engineering activities and earthquakes,to evaluate landslide stability effectively and to adopt scientific and reasonable means to control landslide.After the 6.5-magnitude earthquake occurred in the Longtoushan Township,Ludian County,there was a lot of geological disaster in the area around the town,one of which is farmers market downturn,a serious threat to the town of security.This paper takes the landslide of farmer's market in Longtoushan Town,Ludian County as the research object,carries on the investigation,the engineering geological surveying,the landslide survey and the feasibility study and the construction drawing design of the landslide.Based on the investigation and analysis of landslide and the landslide development pattern,it is to combined with an engineering example of landslide stability analysis,to determine the most slippery area,to put forward the development trend of landslide and comprehensive prevention and control measures.The main research results are as follows:1.On the farmers' market investigation,engineering geological landslide based on surveying and mapping,exploration of landslide,this paper expounds the landslide boundaries,the size and morphological characteristics,analyzed the landslide slip,slide,slide bed material composition,the landslide deformation and failure characteristics,stability and instability mechanism.The farmer's market for quaternary colluvial deposit landslide accumulation sliding along the strongly weathered argillaceous dolomite bedrock surface accumulation of landslides,accused of slip surface for earth rock interface structure,sliding surfaces appear mansard,is a shallow medium traction type accumulation landslides.2.The stability of the landslide in the farmer's market is analyzed by the limit equilibrium method.After the calculation of the landslide,it is between basically stable and understable under the working condition,it is between the understable and unstable state under the heavy rain condition,it is between understable and unstable state under earthquake conditions,.The results show that the stability of the calculation and the actual situation is basically the same.3.According to the farmers market landslide formation mechanism and stability analysis of landslide is the main inducing factors of topography,rock mass structure,hydrogeological condition,human engineering activities,earthquake,according to the scale of landslide and characteristics,friction pile retaining wall,retaining wall,anchor cable sash girder anchorage,defend the net to intercept,drainage project,comprehensive governance,is summed up in the many disasters area of yunnan province long-term practice,which can be taken as reference to similar landslide prevention.