| Yu Jiaping Landslide is located in Yu Jiaping Country,Jing Jiang Town,Ren He District,Panzhihua City,posterior to the Panzhihua Airport.The landslide caused serious damage to the airport runway so they suspend air service,then the landslide moves ahead of creep in under rainfall in the rainy season every year.The landslide once suffered heavy rainfall,it will be easytransforming the landslide deposits to debris flow,which poses a serious threat to 8000 residents and 5 hundred million yuan of theAjilu community,Jin Jiang street and the railway community,thedamage is great,the danger is in a large scale.According to the filed investigation,this thesis identifys the characteristics of the landsilde'snaturalgeography,topography,stratumlithology,tectonic movement,earthquake and hydrogeology and so on,clarrifying the engineering geological conditions of Yu Jiaping landslide;sums up the basic characteristics of the landslide from three aspects which are the morphological characteristics,landslide deformation characteristics and structural characteristics;To analyze the deformation mechanism and development trend based on historical deformation and failure characteristics of the landslide.Analyzed the deformation monitoring and monitoring results of the landslide from the control project and monitoring data Analyze the stability of the landslide based on the limit equilibrium method,and then analyze stabilities of the landslide based on FLAC3D numerical simulation before and after carring out the control projet.Comparing those stabilites to evaluate and discuss the effect of the control project.The main research results are as follows:(1)Yu Jiaping landslide shapeslike"tongue",it is about 1950 meters long,200~400meters wide,8~24.6meters thick,the total volume of the landslide is about 599.5*10~4m3.It belongs to the trailing edge loading pushing landslide,pushing filling area of old landslide sliding forward(II),although the old landslide sliding is resistant,but also can not afford the huge landslide thrust,Yu Jiaping landslide slip zone(II)occurred creep deformation in the trailing edge pushing effect(2)Deformation monitoring of landslide development after treatment,monitoring results showed that:in the heavy rain continued for several days under the influence of the trailing edge of landslide,the overall presentation of a relatively large change,no change in the rest area.In the influence of continuous rainfall,the landslide showed smaller changes,the rest of the monitoring point are basically no change.Indicates that the rainfall on landslide deformation after treatment still has certain effect,but significantly reduced.(3)The quantitative evaluation of the stability of the landslide by limit equilibrium method.:the landslide is in the stable state in the natural state;on the condition of rainfall,the landslide is in unstable state.(4)Analyze the characteristics of field of stress,deformation and stability by using FLAC3D to simulate three-dimensional numerical simulations of the non-reinforced landslide and reinforced landslide,and then evaluate its stability.Comparingit with the monitoring data,the results of the limit equilibrium method to evaluate the effect of the control project... |
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