Composite Pile Wall Supporting Structures Of Key Parameters In Sensitivity Analysis

With the progress of the city development soon, the development and exploitations of the city underground space become new embodiment which strategic that can keep on developing after high building now. Especially the complicated environment conditions of excavation engineering develop quickly. Designs and constructions of excavation engineering request to limit at the single target no longer, but often many targets to request. Supporting structure forms develop toward multifarious system and compound direction accordingly. The compound pile wall which develops under this kind condition is a new supporting structure type. It is composed by cement soil piles, some of little piles, a concrete plate on the top of supporting structure. Sometimes horizon anchors or inclined anchors may be used in compound pile wall. The compound pile wall which has the double technology effects of cutting off water and supporting is a supporting technology of retaining wall. The compound pile wall is a intervenient composite supporting structure of underground continuous wall, cement treated soil gravity retaining wall, soil nailed wall, reinforced earth retaining wall. It is belongs to a half-rigidity and half-flexible composite supporting structure.The compound pile wall is a new supporting structure type. Some scholar have already carried on some researches to the its work mechanism and the design method. For any supporting structure form, designers always would like to make a superior turn to design the engineering facilities or products that project design which makes to have the best usage function and lowest material depletions and manufacturing costs, in order to acquire the best economic benefit. During the process of optimal design, it is excellent to turn the efficiency to be decided by analytical calculation efficiency and accuracies to a large extent. Carrying on a sensitivity analysis has become one of necessary part in the optimal design.Based on the theories research of previous researches, this topic would like to analyze design parameters of the compound pile wall is subjected to the the influence for the internal force and the transform. Carrying on an analysis research of the design parameter in the compound pile wall.In this paper, the main ideas include that:Firstly, we discuss a number of relevant problems in the compound pile wall finite element numerical simulation analyses according to sensitivity analysis. Including the establishment of the model, nonlinear analysis solves method, the basic theories that plane strain finite element and imitates the soil body with the material of DP etc;Secondly, base on finite element numerical simulation method, the model for sensitivity is established by the overall finite-difference method. The relationship among design parameters, design parameters and the sensitivity is analyzed. The influence to the internal force and the transform concerning by the design parameter for the compound pile wall is discussed;Thirdly, the effect of all parameters on the characteristics of retaining structure was discussed using methods of sensitivity analysis. The key parameters that affect working status of the compound pile wall was optimal selected and analyzed. Optimum designs are given for guiding optimum design of the compound pile wall.