Study Some Ploblems Of Super Deep Foundation Pit Retaining Structure With Prestressed Anchor Cable

Prestressed anchor cable pile, a new type of retaining structure, has been studied andapplied since the nineteen eighties, which has been widely used in treatment of landslide anddeep foundation pit. However, further research is still needed. According to related referencesand New Chang’an project, The author in this paper has studied prestressed anchor pileretaining structure deformation, stress mechanism, effect of additional load on internal forcesof retaining structure and stability. The conclusions are important significance factors guidingengineering practice.This paper based on references about simulation calculation theory of limit equilibriummethod, finite element method, numerical analysis, the author has studied advantages anddisadvantages of the three calculation theory and its applicability.Lizheng was used to calculate internal force of retaining structure with different workingcondition. The correlation between depth and internal force maximum has been laid down.This paper based on scheme selection and detailed research of foundation pit in NewChang’an, the elastic anchor pile is used for a detailed calculation. On the other hand, Midasis used for numerical simulation. The result of numerical simulation is close to the fact bycontrast.Orthogonal experimental design is used for the sensibility analysis of the foundation pitin New Chang’an. The result shows that the affection of internal friction angle, cohesivestrength, severe, The embedded depth of pile and prestress decreases in turn.