The Research On Optimized Design Of Supporting Structure Project Selection Of Deep Excavation In Xi'an Region

Deep excavation is a content of geotechnical engineering disciplines which are strong theoretical and practical. It is an important research direction to achieve security, economic in deep excavation works by optimizing design. To research the optimized design of supporting structure in Xi'an loess deep has a better engineering in practice.Soil nail wall structure, cantilever slope pile structure and anchor slope pile structure are used often in Xian region supporting structure projects. Two structures above mentioned are summarized and generalized in this paper:First, It makes the improvement on the entire stability calculation, then use the method of classification test to ensure the security during the construction and use process. Second, a finite element calculation model of the anchor pile supporting structure is proposed., which assumes that the Pre- stressed anchor serves as the elastic supports of the pile body and give the solution method of the mode equation.Based on the theoretical basis, the optimization model is established whose objective function is project cost and then uses the genetic algorithm in MATLAB to optimize the design variables. Study of various variables on the foundation and supporting structure stability and the sensitivity of project cost; and analysis of this optimization for the actual project, that their rationality and feasibility.