Study On Stability Evaluation And Prevention Countermeasures In Zhongpai Middle School Landslide,Lanping County

Due to its unique topography and climate characteristics,landslide Geological disasters occur frequently in Yunnan mountainous areas,causing serious disasters to the local people's production and life and causing widespread concern.Based on years of experience in surveying,designing and managing landslide Geological disasters in Yunnan province,The main research results of this paper are as follows:1,Zhongpai Middle School landslide is located in the middle section of the Hengduan Mountains.It is a tectonic erosion of high mountains and deep cut canyon landforms.The upper part of the landslide is the fourth series of artificial accumulations and residual slopes,and the lower part is the silty mudstone and muddy siltstone of the Kaizuo Formation in the Jurassic Period.The rock formation extrusion and weathering are strong,the joints are fractured,and the hydrogeological conditions are relatively simple.2,Zhongpai Middle School landslide consists of two adjacent landslides.H1 landslide: the leading edge steep height 3M ~ 8M,length 47 M,width 60 m sliding body thickness 3.40 M,volume 9588 M3,in the creep sliding cracking deformation stage;H2 landslide: The leading edge slope is steep,6.5 to 15 M high,50 m to 70 M long,nearly 100 m wide,the sliding body thickness is about 4.50 M,and the volume is 270000m3,which is in the stage of temporary stabilization~tensile deformation.Both landslides are small shallow soil type landslides.Landslide stability is closely related to topography,rock and soil type and structure,rainfall,road construction and other factors.3,The stability of landslide in middle and middle schools was calculated by qualitative analysis and quantitative calculation.The results showed that landslide H1 and landslide H1 were in stable state under natural conditions,and under heavy rain and earthquake,they were in unstable ~ unstable state.4,according to the characteristics and harmfulness of the landslide in Zhongpai Middle School,two landslide management plans were put forward.After comparison and analysis,it was determined that the project management plans such as "anchor cable frame girder + foot retaining wall + drainage ditch" were adopted.Practice shows that the governance effect is good.