非对称基坑开挖对邻近地铁隧道变形性分析  

Analysis of Influence of Asymmetric Foundation Pit Excavation on Deformation of Adjacent Subway Tunnels

作　　者：傅志斌 涂序超[1] 徐有娜 FU Zhibin;TU Xuchao;XU Youna(School of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;Construction Comprehensive Survey,Research and Design Institute Co.Ltd.,Beijing 100007,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]建设综合勘察研究设计院有限公司,北京100007

出　　处：《洛阳理工学院学报（自然科学版）》2022年第3期11-16,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：北京市优秀人才培养资助项目(2021-DCHRCPYZZ-48).

摘　　要：以沈阳市金廊深基坑工程为例,利用MIDAS/GTS有限元软件建立三维数值分析模型,对基坑开挖引起的隧道区间和地铁车站位移情况进行分析,并通过现场实测进行验证。结果表明:基坑开挖深度与地铁隧道埋深相近时,随着基坑开挖卸荷隧道区间结构整体上浮,越靠近基坑中心,上浮变形趋势越明显,但水平和竖向位移不大。基坑开挖会造成车站出入口朝基坑处发生水平位移和整体下沉,出入口扶梯位置上下端位移不明显。Taking the Jinlang deep foundation pit project in Shenyang City as the background,MIDAS/GTS finite element software is used to establish a three-dimensional numerical analysis model to analyze the influence of the tunnel interval and subway station displacement caused by the foundation pit excavation,through the field test verification.The results show that when the excavation depth of the foundation pit is similar to the buried depth of the subway tunnel,the closer the foundation pit,the more obvious the uplifted deformation.But the horizontal and vertical displacement is not obvious.The foundation pit excavation can cause the horizontal displacement and overall subsidence of the station entrance and exit,with little difference in displacement between the upper and lower ends of the escalator at the entrance and exit.

关 键 词：深基坑 既有隧道 数值模拟 变形分析 

分 类 号：TU941[建筑科学—建筑技术科学]