穿越轨道交通复杂环境下隧道施工安全分析  

Safety Analysis of Tunnel Construction in Complex Environment of Rail Transit

作　　者：钱正亚 杜伟 Qian Zhengya;Du Wei(Shenzhen Survey and Mapping Institute(Group)Co.,Ltd.,Shenzhen 518029,China)

机构地区：[1]深圳市勘察测绘院(集团)有限公司,深圳市518029

出　　处：《北方交通》2025年第3期62-66,71,共6页Northern Communications

基　　金：中国中铁股份有限公司科技研究开发计划(2023-重大专项-10)。

摘　　要：以某城市地铁特别保护区范围内的道路隧道深基坑工程为例,采用Midas GTS NX有限元软件进行模拟分析,研究了明挖隧道基坑施工对既有地铁高架桥桩空间的影响,得出施工对基坑自身安全稳定性和对邻近高架桥桩位移变形、沉降的影响规律:邻近位置的承台结构发生向基坑方向的水平位移,竖向位移随荷载增减变化,卸载过程隆起,加载过程沉降。Taking the deep foundation pit project of the road tunnel within the range of the special protection zone of metro in a city as an example,the simulation analysis is made by using the Midas GTS NX finite element software,so as to study the influence of open cut tunnel foundation pit construction on the space of the existing metro viaduct pile.The influence rules of the construction on the safety and stability of the foundation pit itself and the displacement,deformation and settlement of adjacent viaduct piles are obtained.The structure of pile caps in the adjacent position has horizontal displacement towards the foundation pit direction,and the vertical displacement changes with the increase and decrease of load.During unloading,it rises,and during loading,it settles.

关 键 词：隧道开挖 侧穿地铁桥桩 基坑围护 变形控制 安全分析 

分 类 号：U458[建筑科学—桥梁与隧道工程]