| For different geological conditions,civil engineering construction is a process of continuous application and innovation breakthrough.According to the construction condition of Beijing metro line 16 Suzhou Street subway station,adjustment to the eight guide hole pile construction method is necessary.the main structure of the construction project retain only the top four pilot that avoid the difficulty of Precipitation of lower strata which may boost the risk of pilot tunnel excavation,and also save project cost.In consideration of the construction of the main structure of the improved hole pile method,we use numerical simulation to calculate the same field monitoring data analysis in this paper.The following aspects are studied:Firstly,using FLAC3 D finite difference numerical simulation software to establish the 3D model of structure formation of the station,After the optimization analysis of the construction scheme of the station hole pile method,We come to the conclusion that the first after the excavation of side excavation tunnel excavation near the tunnel from the first thermal distance and heading excavation in the first span arch after excavation the side span arch,can better control the surface subsidence displacement and thermal tunnel,as the optimal construction scheme;arch lining construction in two with two span steel rod set to control the pouring lining structure stress had little effect on the deformation and ground settlement,the construction can be considered to cancel the program settings.Secondly,combined with the analysis of field monitoring data,the mechanical characteristics of the station in the construction stage and the influence of the displacement of the surface and thermal tunnel are analyzed.Thirdly,using the finite element software to establish the three-dimensional load structure model of the station,and analyze the structure safety of the station at the end of the water level and the high water level after the completion of the construction. |
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