Research On Optimization Of High Level Pit Support In Riverside Region

Foundation pit in building is a systematic engineering with a variety of complicated factors influencing each other. The choice of its supporting system plays an important role in the whole engineering and has a direct influence on the quality,process and construction cost.With the development of the city, the land resources become increasingly scarce, in this case, the use of underground space of more and more important, the excavation and supporting of foundation pit engineering puts forward higher and more stringent requirements.Meanwhile,because the foundation pit is located in a certain place and high constructing cost and serious result of collapsing accident.so,The foundation pit supporting scheme must be safe, reliable, technically feasible and economically reasonable.This article combines the comprehensive Huang Shan city people’s hospital ward building excavation and supporting of foundation pit engineering project, do the following work:(1)Firstly introduces the types of retaining structure of foundation pit,characteristics and applicable,qualitatively analyses the foundation pit supporting scheme, and then analyzes the basic principles and the selection of foundation pit supporting.(2)Discusses the method of optimal selection, and puts forward the suitable for the engineering practice of foundation pit supporting optimization selection method,analytic hierarchy process(AHP),Analytic hierarchy process is a kind of practical solution or multi-objective decision method, is a combination of qualitative and quantitative decision analysis method. Is often used in goal, criteria, multi-factor and multi-level complex unstructured decision problems, especially the decision problem,has the very broad practicability. Analysis model is established finally determined the optimal supporting scheme of foundation pit.(3)Use a Li Zheng deep foundation pit version of 7.0PB1 to Calculate the internal force and displacement calculation and stability analysis of supporting structure under variable situations.(4)As foundation pit excavation, underground water is related to the processing(5)One of the key factors to the stability of foundation pit supporting,Project is located in Xin An river,with high-level water,No doubt increased the engineering difficulty.Paper combined with practical engineering precipitation for engineering design.Combined with practical engineering, using the related theory to design of foundation pit engineering, and the application of FLAC3 D numerical analysis, the scheme of design of comprehensive display supporting system of displacement field and stress field.Paper based on a comprehensive Huang Shan city people’s hospital ward building foundation pit supporting projects, research on foundation pit supporting scheme is optimized. For the similar foundation pit supporting engineering provides an effective design train of thought.