Analysis Of Soil Displacement Caused By Underground Continuous Wall Construction Of Deep Foundation Pit

With the accelerated process of urbanization in China, the population of the city is increasing,In order to meet the convenience of people’s travel,the pressure of urban rail transit is also growing.however, Urban construction group and more intensive, the use of resources on the ground is very limited, people have to turn to underground space resources. In addition to the first tier cities in the country to build the subway, many second tier cities such as Hefei, Hangzhou, Wuhan and so on, forced by the pressure of the traffic is also active in the construction of subway lines. The subway station is an important part of the subway project, the construction is often accompanied by excavation and retaining of deep foundation pit, as a good foundation pit retaining structure, the underground continuous wall has been widely used in subway station project. But, people pay less attention to the construction stage of the formation of the soil displacement, these displacements usually account for a considerable proportion of the total displacement, if the construction is handled properly, will give after the excavation of the foundation pit soil produced greater security risks.This paper first introduced the characteristics of underground continuous wall as retaining structure of foundation pit engineering, described how to use ABAQUS finite element software is reasonable to similate underground continuous wall in chamfer stage, and similate the Hangzhou subway line No. Four the first phase of the project Puyan station in the case of underground continuous wall supporting underground continuous wall in chamfer stage displacement and the deformation of soil, The different parameters of simulation results were compared and analyzed, with the actual monitoring data analysis, the process of analysis of the field data obtained in the geological conditions of the area even the soil deformation caused by the characteristics of wall construction, at the same time in the model with the actual data on the basis of comparative analysis. Simulation analysis of several parameters of underground continuous wall excavation on surrounding soil displacement effect and we draw some conclusions.(1) Analysis are made in the process of underground continuous wall, influence the settlement and horizontal displacement of the surrounding soil by changing the construction sequence of the construction groove, the proportion of mud and slot width.(2) Based on the analysis of the field measured soil displacement data, the law of the settlement and horizontal deformation of the surrounding soil under the geological condition is obtained.(3) Through the comparison of measured data and numerical simulation results, it is proved that the finite element software is feasible in the field of geotechnical engineering.