城市地铁施工沉降的数值模拟研究

Research on Numerical Simulation of Subway Construction Settlement

地下工程施工,会引起地层移动而导致不同程度的沉降和位移,从而影响到隧道和地表建筑物的正常使用和安全运营。以某一地铁施工为依托,运用PLAXIS有限元软件对施工进行动态开挖模拟,分析其沉降因素,正确估计特定地区可能发生的地面变形沉降,将模拟结果与现场监测的资料进行了对比分析,模拟结果可信度高。该研究对城市地铁隧道工程的设计与施工具有重要的指导意义。

Underground engineering will cause stratum movement , which may lead to varying degrees of settlement and displacement. It would affect the serviceability and safe operation of the tunnel and surface buildings. The study researched on the dynamic simulation of construction based on a subway, applied the program of PLAXIS to analyze the factors of the set- tlement and to estimate the ground deformation and settlement of a specific area accurately by finite element method （FEM）. The simulation result was analyzed comparing with on-site monitoring data. It has an important instruction to design and con- struct the subway tunnel.