Pre-Assessment of the Impact of the Construction Stage of the Building Foundation Pit Support Project on the Subway
Based on the engineering conditions,foundation pit engineering design and construction plan of the No.12 plot of the re-served land for the"whole village overall planning"land preparation project,the numerical analysis method is used to simulate the foundation pit support,excavation process and other working conditions,and the foundation pit excavation is evaluated.The impact of various working conditions on rail transit facilities.The results show that:(1)When the closest distance between the foundation pit and the subway tunnel of the proposed project is 8.4 m,the maximum lateral displacement of the subway tunnel is 2 mm,which is within the allowable deformation value of the subway;(2)The buried depth of the subway is28.1 m,and the excavation depth of the founda-tion pit is 14.1 m,the change of groundwater has little effect on the subway,and the maximum subsidence of the subway is 1.7 mm,which meets the requirements of the specification for the deformation value;(3)The proposed foundation pit support scheme meets the current subway safety deformation control requirements.
foundation pit supportsubwaynumerical analysisunderground seepage
NETL
NSTL
万方数据
维普
