Research And Application Of Deep Foundation Pit Supporting Scheme

Building a deep foundation pit supporting structure and rock and soil, and other fields is involved and overlapping complex systematic engineering, has the very strong comprehensive.About security, economic, environmental and technical aspects of construction period, the reasonable design of foundation pit supporting is a major aspect of engineering quality to avoid accidents.Therefore, the optimization and the optimization design of foundation pit supporting scheme, as the authorities to pay close attention to and the key research problems.Deep foundation pit design, the author of this paper need to be solved in the practical application of problems as well as the experience and lessons in some of the foundation pit supporting accident, mainly adopts theoretical analysis, model and method combining the practical engineering application, the selection of foundation pit supporting scheme and detail structure optimization design to compare and analysis of comprehensive, reasonable, in order to better guide the practical engineering design and application to engineering practice.This article first introduced the common deep foundation pit support type and its applicable condition and advantages and disadvantages, the choice of deep foundation pit support scheme has carried on the qualitative analysis, and then expounds the deep foundation pit supporting optimized selection of the basic principles and the main influence factors, summed up the optimized selection of the main method of foundation pit supporting is suitable for the practical engineering of deep foundation pit support optimization of selection methods.In addition to the characteristics of deep excavation factors are fuzzy, according to the principle of fuzzy mathematics, fuzzy comprehensive evaluation method and analytic hierarchy process(ahp), with safety and reliability, construction technical feasibility, save time, economy and environmental protection five evaluation index as the optimization goal.Established the comprehensive evaluation model of foundation pit supporting, supporting scheme optimization of selected.This article tgo wanda plaza project of deep foundation pit as an example, deep foundation pit supporting design scheme is proposed.Qualitative analysis of foundation pit supporting scheme for primary first, combining the multi-objective fuzzy evaluation model to quantitative analysis of several primary scheme, ultimately determine the optimal scheme of foundation pit supporting design optimization method.Through optimizing method to establish the best supporting scheme, the optimal solution for the selected research detail structure design.This article in tgo wanda plaza, B area foundation pit supporting, for example focus on stability of the supporting structure safety and economic rationality, supporting structure design,detail design and precipitation was studied finally introduces the foundation pit monitoring scheme and environmental solutions.