盾构施工引起地表振动响应的数值模拟研究  

Numerical Simulation Study on Ground Vibration Response Induced by Metro Shield Construction

作　　者：王鑫[1] 韩煊[1] 周宏磊[1] 雷崇红[2] 

机构地区：[1]北京市勘察设计研究院有限公司,北京100038 [2]北京市轨道交通建设管理有限公司,北京100037

出　　处：《地下空间与工程学报》2015年第6期1552-1557,共6页Chinese Journal of Underground Space and Engineering

基　　金：北京市科技新星计划资助项目(Z131106000413084);北京市轨道交通建设管理有限公司支持项目

摘　　要：将北京市轨道交通八号线二期南段盾构隧道施工作为背景,基于工况的典型性分析,首先,利用盾构机作业面的现场监测,获得了盾构隧道作业振源的时程曲线并就其频幅特性进行了分析研究;其次,对盾构施工所引起的地表土体的振动情况进行了现场监测分析。在此基础上,利用Z-soil大型有限元分析软件,考虑隧道结构与周围土层的动力相互作用,以实测振源时程作为荷载输入,建立了地铁盾构隧道施工引起周围地表振动响应的三维数值分析模型,结合现场测试成果,分析了地铁隧道盾构施工引起的地表(纵向的和横向的)振动响应规律。上述工作可为类似工况下地铁盾构隧道施工引起周围环境振动响应的评估分析提供可靠借鉴,从而使得地铁项目的设计与施工更为合理。Taking shield construction of Beijing subway line No.8 as the research background,considering the typical working conditions,first of all,by making use of the field monitoring at the working face of the shield construction,the time history curve of vibration source has been obtained,of which the amplitude and the frequency characteristics have been analyzed. Secondly,the field testing of the dynamic response of the ground surface induced by the shield tunneling have been carried out. Based on these,taking advantage of the finite element analysis software Z_ soil,considering soil-structure dynamic interaction,using the measured vibration source as loading input,the three-dimensional finite element analysis model of the surrounding environment vibration response induced by shield construction has been established,and then,combined with the in-site test results,regularities of the dynamic response of the ground surface induced by the metro shield tunneling have been studied. The above research,could be used as the basic works of the evaluation and analysis of the environment vibration caused by the shield construction,and consequently,can provide reliable references for the reasonable design and construction of the subway project.

关 键 词：地铁盾构施工 土与结构相互作用 现场测试 数值模拟 振动响应 

分 类 号：TU311.3[建筑科学—结构工程]