| Our country is being in the economic development high speed development the time, the massive infrastructure, the municipal engineering, the energy facility construction and so on inevitable needs to face the stability of slopes.The factor of triggering landslide are very much, the rainfall and the earthquake are the most common suggestion landslide external factors.Humanity's project activity like excavates carries as well as the reservoir sluice and so on also is causes the landslide the important reason.Up until now, the limit equilibrium slice method for slope analysis is used widelyin domestic and international yet. Its mechanics model is simple, has alreadyaccumulated very abundant practical experience. My paper uses the safety coefficient as the starting point and announces the diference of computing technology ; because the landslide hazardous urged the humanity to go to the cognition unceasingly and to study it, waged the struggle while diligently and the landslide to know the grasping landslide glide mechanism, the unceasing perfect stability of slope analysis method, proposed the government reinforcement effective method, as well as carried out the pointed landslide monitor and the forecast work.To the landslide the thorough understanding is unceasingly based on correlation science and so on geological project, soil and rock mechanics, mathematics, engineering mechanics, computer unceasing consummations and the development, includes the multi-disciplinary multi-domain three-dimensional research to cause the humanity in the study stability of slope domain to the depth development.This paper take Slope of Sanjiaoping in Sichuan Yongdingqiao Reservoir as the research background,First rests on the geology background investigation, unified in the scene monitor material, the room experiments, has analyzed the slope body glide scope, the scale, slippery belt soil characteristic, depth, distortion destruction sign and so on,From geological analysis method obtaining, to affects each kind of condition which the slope forms (terrain landform, formation lithology, hydrogeological conditions, earthquake, human activity and so on) carries on the careful analysis one by one,Has determined the slope in the landslide forming process leading factor and the suggestion factorand carried on the analysis to the landslide formation mechanism,Thought this slope manifests is being in the process of creep - tension fracture to landslide transformation.The earthquake as well as the selfweight stress, the discharge distorted to the slope distortion evolves the controll ability function, was the master control factor; The rainfall, the human project activity are urge the slope to have the suggestion factor which the fall destroys.Calculates the security coefficient value under the different operating mode in the geological analysis foundation using the limited equilibrium analysis method, through the judgment analysis thought the entire slope body will be at the limit non-steady state, the rainstorm situation willcause the glide the possibility to increase.Adopting the Reduces the water level And add the pressure foot measures can enhance the slippery body to a certain extent the safety coefficient, is option which may consider in the government.Has carried on the stability of slope probbilistic analysis through the Monte Carlo method. union The limited equilibrium Morgenstern&Price carries on probbilistic of safety analysis, by probability of failure and reliability index parameters and so on has further judged under the slippery body different operating mode steady state,Simultaneously has carried on the parameter sensitivity analysis, obtains the slippery belt soil body by the resultф; the water level change affects the soil body stable more essential parameter.This paper also carried on in the value computation finite element method to analyze the side slope stability.using the couple with the finite method and slice method has analyzed the slope body stress field distribution situation And has given each small vertical and horizontal slices safety coefficient, and for further explained the slope formed and the steady state has provided a more reliable basis .At the same time, the application finite element method has studied in the earthquake power situation the side slope stability, Using the Newmark slide method and the finite element method union, has analyzed the earthquake to the slope body stability variation influence, as well as the slope body permanent deformation situation, provides the reference for the government and the monitor work.Through above each method to the stable analysis, and has carried on each method contrast;Obtains the geology analysis method is each method foundation work, embarks from the geological foundation work can the better analysis side slope stability, simultaneously also can examine other analysis method the accurate rationality to provide the basis;The limited equlibrium method is the relative quite mature method, can to a certain extent the very good judgment slope body condition, and this method easy to understand, the computation is simple;probbilistic and sensitivity analysis may further firmly bring to grade the body condition as well as the determination influence stable primary factor The finite element method and the slices coupling method has made up the limited equlibrium method,through This method may obtain the stress field distribution as well as each slice factors of safey coefficient.But the coupling method has still not been able to get rid of the limiting equilibrium in the stable judgment the judgment pattern; Finite element the finite element method with Newmark Sliding Block analysis union, In the earthquake power influence slope stability analysis, overcame pseudostatic analysis method the function instantaneous load with the long-term function load equivalent procedure, through increased the yield acceleration and permanent deformation parameters and so on made the analysis result closer earthquake function the actual situation.
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