Application Of Uncertain Information In Slope Stability Analysis

Slope stability analysis has always been a very important research of geotechnicalengineering. So far, slope stability analysis method is mainly divided into two categories. Oneis limit equilibrium method which is based on the safety factor and has a large number ofengineering application examples. Another is the slope numerical analysis which usepowerful computing capability of computer to simulate the slope internal mechanical analysis.However, these are still many shortcomings on this methods: Limit equilibrium method cannot take into account the random uncertainty of geotechnical parameters which is really exists.Leading to the slope with same safety factor has a large gap in the probability of slope failure.Numerical analysis method using the geometric nonlinear iteration, leading to the existenceof convergence problems. And there are many controversial in the judgment of slopeinstability. To solve these problems of traditional methods, the paper looking for someuncertain method can effectively deal with the results due to the uncertainty of the parametersor the model from uncertain information method. The main results are as follows:(1) Firstly we reviewed a variety of classic slope stability method as well as severalcommonly used uncertain information method, from which to extract a more reliable slopeanalysis framework and uncertain information method approach to slope stability problems.(2) Because of the shortcomings of the traditional Swedish arc method, on the basis of arandom collection representing geotechnical parameters with uncertainties, we integrate ofmultiple safety factor of landslide surface by Dempster combination rule to get a morecomprehensive and accurate results.(3) Because the traditional method can not handle quantitative analysis of slope stabilityunder strong rain. This article based on uncertainty theory establish a random functionbetween slope stability and rainfall and use of Transferable Belief Model tomake the resultinto a probability distribution, eventually come to a new analysis.(4) Xiaolangdi Reservoir on the Yellow River Slope field sampling to establish indoorand outdoor research model. Apply Uncertain information method to analyze the slope andexperimentally verify the effectiveness of the method in practice slope engineeringapplications.