Evaluation Of Slope Stability Based On Reliability Theory

With the development of extensive engineering constructions in our country, more and more engineering projects must deal with slope problems; these can inevitably fall across a lot of uncertain factors, such as complexity, levity and randomicity of characters and parameters of rock and soil mass. These uncertainties have already been making general certain analysis means having rather shortage. So it is necessary to introduce the reliability theory in the research on the stability analysis of slope systems. Reliability theory can make quantificational analysis of uncertain factors which influence the stability of slope systems in the probability point of view. This method can educe quantificational result of uncertain factors of slope stability. It is a very useful method and is complementarity and development to traditional methods.The deformation and collapse of slope is a long-time changing course, the slope stability is affected by the slope's inherent factors and external factors, including the types and natures of rocks and soils, the slope geological structures, the slope shapes, the groundwater, the vibration, the climatic conditions, the weathering, the slope's vegetation and mankind's project activities, and so on. Of which, mankind's project activities and the groundwater are of great importance. In this paper, the action mechanisms of influence factors are summed up and summarized.In order to study the influence degree on the slope stability by the major factors, taking Wang Liang Si temple as an example, make an sensitive analysis of it by the cross experiment method, taking the following factors into consideration: cohesion(c), angle of internal friction ((?)), gravity(γ), the ground water lever (h_w) and the height slope (h). The result is that, the influences from big to small listing as: (?),c,h_w,γ,h.In the probability reliability analysis of slope stability, search for the most critical slip surface in probability by combination parameter method. With the basis of the smallest reliability index, the probability critical slip surface is farm more near to practice than the critical slip surface searched for by the average of the variables, and its resolving may resort to the existing deterministic analysis method procedure. The safety coefficient method is a...