盾构隧道施工对临近桥桩影响数值及现场监测研究

发布时间：2018-03-07 12:35

本文选题：盾构隧道施工　切入点：数值分析　出处：《岩土力学》2015年S2期 　论文类型：期刊论文

【摘要】：随着城市内地铁盾构区间隧道临近城市道路桥桩工程的增多,急需研究盾构隧道临近桥桩施工对桥桩的变形影响问题。采用有限元数值计算方法,结合盾构隧道穿越桥桩实际工程,建立了盾构隧道施工对临近桥桩影响的数值分析模型,模拟盾构隧道施工,对盾构隧道穿越临近桥桩的桩体沉降、桩体侧移、地表沉降进行了数值分析研究,盾构隧道穿越时及穿越后桩体沉降、桩体侧移、地表沉降控制结果较为理想,桩体处于稳定状态。结合现场监测成果,对数值计算结果和监测结果进行对比分析,表明采用的数值分析计算模型、参数取值对盾构隧道施工对临近桥桩影响的模拟是可靠的,可以运用文中的数值计算方法预测后续盾构隧道施工引起临近桥桩沉降、桩体侧移和地表沉降结果。
[Abstract]:With the increasing of the bridge pile engineering of the iron shield tunnel near the city road in the urban interior, it is urgent to study the influence of the construction of the shield tunnel adjacent bridge pile on the deformation of the bridge pile. The finite element method is used to calculate the deformation of the bridge pile. Combined with the actual engineering of shield tunnel crossing bridge pile, the numerical analysis model of shield tunnel construction on adjacent bridge pile is established, and the shield tunnel construction is simulated, and the pile settlement and pile lateral movement through adjacent bridge pile of shield tunnel are simulated. The numerical analysis of the surface settlement shows that the pile settlement and the lateral displacement of the pile during and after the shield tunneling, the control result of the surface settlement is relatively ideal, the pile body is in a stable state, and the monitoring results are combined with the field monitoring results. The results of numerical calculation and monitoring are compared and analyzed. The results show that the simulation of the influence of shield tunnel construction on adjacent bridge piles by the numerical analysis and calculation model is reliable. The numerical calculation method in this paper can be used to predict the settlement, lateral displacement and surface settlement of the adjacent bridge pile caused by the subsequent shield tunnel construction.
【作者单位】：北京交通大学土木建筑学院;北京市市政工程设计研究总院有限公司;
【分类号】：U455.43;U443.15

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