Sensitivity Study Of The Reliability Analysis Of Slope Stability And Soil Parameters

In civil engineering, it is a very important problem that the stability analysis of slope. It involves a great deal of project fields, such as a project of highway and bridge, the hydrological and hydroelectric engineering, architectural work, etc., So, the stability of slope has been an important research content of the soil project circle of rock all the time.In slope project, the traditional evaluating method is factor of safety method. It does not consider the variability of soil, regarding soil as a uniformity material with a certain" average nature" material. The method treates various kinds of design condition, various kinds of index and parameter as fixed values, then choose a certain calculating model to calculate, And all belong to those unknown, indefinite factors a single safety coefficient. The result from the method is clear, so easy to accept by people. But such traditional method has neglected the uncertainty of the soil properties parameter, and does not conform with reality. In recent years, people have realized the uncertainty in the soil project question gradually. It is a kind of inevitable development trend that people introduce probability analysis method into slope project.It is difference from traditional factor of safety method, probability analytical method consider dispersed quality and dependence between parameters of soil in stability analysis of slope. It has considered all sorts of uncertain factors existing actually in rational by way of probability, so it can reflect the real safety character of slope for objectiveThis thesis has been systematically analyzed and appraised slope reliability from four sides: appraising and advance disposing soil parameter; probability distributing model of soil parameters; sensitivity of parameters; influence that correlation between parameters to reliability index, etc. Based on the soil model that set up, a method is advanced for calculating reliability index of slope and a calculating program for this method is also compiled with Visual Basic 6.0. Factor of safety method combines with probabilistic analysis method in this paper, at first adopt traditional safety method to search the critical slip surface, then introduce probability analysis method to evaluate the stability of slope and analyze the sensitiveness factor, study the regularity among them. The conclusions made is meaning of consulting very much in the probability index of slope stability analysis in the future, and work consulting to making according to the soil slope design specification of theory of the probability index too.