Stability Analysis Of Deep Foundation Pit Supporting Structure Of Subway Station

In recent years,with the continuous progress of the process of urbanization in China,a large number of people are pouring into the city,and urban traffic is facing great challenges.In order to relieve the pressure of public transportation and ensure the normal travel of citizens,Hefei has opened and operated two subway lines recently,and plans to build a transportation network consisting of 12 lines in the near future.As everyone knows,most of the subway lines are located below the surface,which inevitably relates to the foundation pit engineering,as an important part of the construction of the metro station,how to support in order to ensure the stability of foundation pit in the construction process,is the study we need.In this environment,taking the deep foundation pit of Mengcheng Road Station of Hefei rail transit line 3 as an example,combined with the Li Zheng deep foundation pit and Midas/GTS software,the following aspects are studied.1.Through consulting a lot of related data,summarizes several common support forms in foundation pit engineering,and briefly introduces the advantages and disadvantages of each support form and its applicable conditions.2.According to the geological survey data in the construction site of Mengcheng Road station,the foundation pit supporting structure is selected,and the stress and foundation deformation of the retaining structure are analyzed according to the calculation software of Lizheng deep foundation pit,and the stability of the foundation pit is checked.3.Based on the Midas/GTS numerical analysis software,a 2-D structural model of the standard section of foundation pit is established,and the horizontal displacement cloud chart of the retaining structure under each working condition is displayed,and the displacement cloud picture in the vertical direction of the main influence area after the foundation pit is completed is also presented.4.The results obtained from numerical simulation and actual monitoring data are plotted in the same chart in the form of polygonal chart,and the trend and peak value of the two curves are compared and summarized.Through the analysis of the deep foundation pit engineering,the research results of paper can provide an important reference for the foundation pit engineering with the same geological conditions in the future.