新建地铁隧道下穿既有线车站安全影响分析  

Analysis of the influence of newly-built subway tunnel underground excavation on the safety of existing railway stations

作　　者：吴万华 Wu Wanhua(China Railway Tunnel Bureau Group Road&Bridge Engineering Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中铁隧道局集团路桥工程有限公司,天津300300

出　　处：《山西建筑》2021年第9期119-124,共6页Shanxi Architecture

摘　　要：针对新建地铁隧道临近明挖及下穿暗挖条件下既有线车站的运营安全问题,以沈阳市新建九号线隧道下穿一号线(运营线路)为工程背景,通过数值模拟分析得出明挖及暗挖方案对既有线车站沉降及结构最大位移的影响均处于安全范围之内;制定既有线监控量测方案,结合自动化监测现场量测数据表明一号线铁西车站呈稳定状态,中洞破桩施工后局部断面已形成了明显的沉降槽,需要重视对变形区域的轨道平顺性的检测。自动化实时监测现场量测数据有利于及时掌握和提供地铁一号线对应区域在基坑明挖施工期及暗挖下穿期的状态信息,及时指导施工,起到了重要的地铁保护与安全保障的作用。In view of the operational safety problems of existing railway stations under the conditions of newly-built subway tunnels near open-cut and under-cut,taking the newly-built No.9 subway tunnel in Shenyang as the engineering background,through numerical simulation analysis,it is concluded that the impacts of open-cut and under-cut schemes on the settlement of existing railway stations and the maximum displacement of structures are within the safe range.The monitoring and measurement scheme of existing lines is worked out.Combined with the field measurement data of automatic monitoring,it shows that Tiexi Station of Line 1 is in a stable state,and obvious settlement grooves have been formed in local sections after the construction of broken piles in the middle tunnel.It is suggested to detect the track smoothness in the deformation area.Automatic real-time monitoring of field measurement data is conducive to timely grasping and providing the status information of the corresponding area of Metro Line 1 during the open excavation construction period and the underground excavation underpass period,guiding the construction in time,and playing an important role in subway protection and security.

关 键 词：地铁隧道 既有线 自动化量测 结构变形 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]