Application Of Stochastic Finite Element Method In The Supporting Of Deep Foundation Pit

Along the foundation pit direction to deepth, more and more accidents of slope failureforbid our engineer to think over this task. A elastic-plastic stochastic finite element modelfor stability analysis of deep foundation pit slope is set up based on improvedDrucker-Prager yield criterion and use reliabilition theory to make a concrete analysis ofdeep foundation pit slope stability in engineering example.Some hypothesis haved been considered in the following:1. The soil of slope is in the certain condition of elastic-plastic appearance.2. Considering the perculiarity of foundation pit engineering, we do not investigate theeffect in the effect of underground water.3.Considering the random quality of soil parament in E,C,φ.The results indicate the displacement, stress and strain agree with the common rule theengineering excavation later and reflect the following aspects concretely:1. Displacement fields demonstrate the under parts has the trend of moving.2. There is very obvious concentration for stress and strain fields in the middle-underparts of the slope border and the fault.3. Plastic strain concentrates on the slope border and the fault and there is obviousplasticity. Strength reduction stochastic finite element method is utilized to calculate thesafety factor of the slope.We also evaluate the stabilition of slope based on the fuzy-method which established inthis article.