地铁穿越五六十年代老铁路隧道方案研究  

Study on the Scheme of Subway Crossing the Old Railway Tunnel in the 1950s and 1960s

作　　者：王文辉 WANG Wenhui(Wuhan Tiesiyuan Engineering Consulting Co.Ltd.,Wuhan Hubei 430063,China)

机构地区：[1]武汉铁四院工程咨询有限公司,湖北武汉430063

出　　处：《铁道建筑技术》2024年第8期45-49,共5页Railway Construction Technology

基　　金：郑州地铁集团有限公司科研项目(ZZGD-08AFY-W20002)。

摘　　要：长沙隧道为五六十年代建设的老旧铁路隧道,且周边环境复杂,与城市主干道韶山路的桔园立交交织在一起,周边房屋密集、高楼林立。本研究梳理老隧道设计情况,结合长沙市轨道交通7号线项目实际,对地铁上跨既有老旧铁路隧道施工方案进行研究,针对性提出合理可行的明挖法施工方案,并通过数值仿真软件对施工过程进行模拟,分析上跨开挖对老旧隧道及轨道变形影响。结果表明:明挖法方案能满足长沙隧道及轨道变形限制要求,所设计的地下暗桥结构,可大幅减小地铁运营对长沙隧道的振动影响,同时又避免了长沙隧道因长期老化而进行维护作业对上方地铁运营的影响,所选方案合理可行。The Changsha tunnel,constructed in the 1950s and 1960s,is an old railway tunnel situated in a complex surrounding environment.It intersects with the orangery overpass on Shaoshan Road,a main urban thoroughfare,and is surrounded by densely packed houses and high-rise buildings.This study reviews the design of the old tunnel,and in conjunction with the actual situation of Changsha Metro Line 7,it investigates the construction scheme of the subway crossing the existing old railway tunnel.A reasonable and feasible cut and cover method is proposed,and the construction process is simulated using numerical simulation software.The impact of the crossing excavation on the deformation of the old tunnel and track is analyzed.The results show that the cut and cover method can meet the deformation limitation requirements of the Changsha tunnel and track.The designed underground dark bridge structure can significantly reduce the impact of subway operations on the vibration of the Changsha tunnel,while also avoiding the impact of maintenance work on the subway operation above due to the long-term aging of the Changsha tunnel,the selected scheme is reasonable and feasible.

关 键 词：地铁施工 老铁路隧道 方案研究 暗桥结构 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]