地铁区间隧道下穿既有建筑物基础的沉降影响规律分析  

Analysis of the Settlement Influence Law of Subway Tunnels Passing Through Existing Building Foundations

作　　者：张续耀 ZHANG Xuyao(No.6 Engineering Co.,Ltd.,China Railway 19th Bureau Group Wuxi,Jiangsu 214028,China)

机构地区：[1]中铁十九局集团第六工程有限公司,江苏无锡214028

出　　处：《山东商业职业技术学院学报》2024年第6期123-128,共6页Journal of Shandong Institute of Commerce and Technology

摘　　要：为研究城市埋深地铁隧道在其施工开挖过程中对周边建筑物变形的影响,以某地铁区间下穿小区建筑物为研究对象,首先对开挖过程隧道时序监测数据进行分析,然后结合数值模拟软件进行建模,分析埋深隧道在开挖过程中的桩体水平位移及地表沉降位移的变形规律,与实测数据进行对比。结果表明:受隧道开挖掘进时序的影响,三种监测曲线都主要呈现“震荡式递增”变化,拱顶变形量约在8mm,而周边收敛点变形量约小于6mm。模拟及实测数据显示在不同开挖断面下的桩体深部水平位移有着较为一致的变化规律,变形主要发生在桩顶以下约4~5m处,两者最大偏差均在20%以内。在不同开挖距离下,埋深隧道邻近建筑物角点处监测点的累计沉降位移有着较为相似的变化规律。总体而言,受局部作用差的影响,D01、D02一侧的实际监测值要小于D03、D04一侧的实际监测值。本研究可为类似工程施工提供借鉴。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.

关 键 词：隧道开挖 临近建筑物 桩体位移 地面累计沉降 

分 类 号：U231.3[交通运输工程—道路与铁道工程]