Analysis of the Settlement Influence Law of Subway Tunnels Passing Through Existing Building Foundations
In order to study the influence of urban buried subway tunnel on the deformation of surrounding buildings in the construction and excavation process,the interval between Meilin Road Station and Xianshuigu West Station of Tianjin Metro Line 6 was taken as the research object.The tunnel time sequence monitoring data during the tunnel excavation process were firstly analyzed,and then the modeling was conducted with numerical simulation software.The deformation law of pile horizontal displacement and surface settlement displacement during the excavation of deep tunnel are analyzed and compared with the measured data.The results show that,under the influence of tunneling timing,the three monitoring curves mainly show an"oscillating increase",the deformation of the vault is about 8mm,while the deformation of the peripheral convergence point is less than 6mm.The simulation and measured data show that the horizontal displacement of pile deep under different excavation sections has a relatively consistent change law,and the deformation mainly occurs at about 4～5m below the pile top,and the maximum deviation of both is within 20%.Under different excavation distances,the cumulative settlement displacement of the monitoring points near the corner of the building has a similar change law.In general,the actual monitoring values of D01 and D02 sides are less than those of D03 and D04 sides due to the influence of local action difference.The study on the comprehensive influence of deep tunnel excavation on adjacent buildings can provide reference for similar projects.
tunnel excavationadjacent buildingspile position shiftaccumulated ground settlement
NETL
NSTL
万方数据
