Analysis the impact of overpass construction on subway tunnel based on MIDAS/GTS NX
The construction of new buildings within the protection zone of subway tunnels can have adverse effects on the subway tunnels.In order to ensure the safety of the subway tunnel,this paper explores suitable theoretical analysis methods to analyze zhe degree of impact before project construction,to determine its feasibility and provide a theoretical basis for the selection of construction plan.Taking the construction of a pedestrian overpass on Zhongshan Road in Harbin City as the research object,the MIDAS/GTS NX software was used to numerically simulate the displacement and deformation of the subway tunnel under three conditions:the initial stage of the section,the pile foundation construction stage of the pedestrian overpass,and the completed use stage of the overpass.The analysis results show that during the construction and use stages of the overpass,the additional deformation of the structure increases but remains within the allowable range,meeting the design requirements for the ultimate limit state of normal subway operation.After construction,dynamic monitoring of the subway tunnel in this section was conducted,and the deformation remained within the controlled range.The theoretical analysis results are basically consistent with the test results,the method can be used to analyze the feasibility of similar project construction.
NETL
NSTL
万方数据
维普
