采用轻质填料填筑路堤对其下方盾构隧道的影响研究  

Study on Influence of Using Light Padding to Fill Embankment on Shield Tunnel beneath It

作　　者：李阳 LI Yang

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2022年第1期204-207,M0018,共5页Urban Roads Bridges & Flood Control

摘　　要：在城市已运营盾构隧道附近建设新的工程,是城市建设中越来越难以避免的课题。无论在盾构隧道上方加载或者卸载,都将对盾构隧道的结构受力和安全运营产生长期的影响。针对此问题,在填筑路堤时,提出先挖方,后采用轻质填料等荷载置换法,解决填筑路堤施工对盾构隧道的影响这个问题。在分析过程中,以实际工程为依托,采用Plaxis有限元软件建立路基-隧道-土耦合模型,考虑位移、超孔水压力等方面,研究了路基施工对地铁盾构隧道的影响,并分析变形规律,得到相应的结论。其成果可为同类工程起到参考作用。The construction of new project near the existing urban shield tunnel is more and more difficult to avoid the subject in the city construction.Whether or not to upload or unload above the shield tunnel all produce the long-term influence on the structural stress and safe operation of shield tunnel.Aiming at this problem,the load replacement method of excavation first and light padding later is proposed in filling the embankment to solve the influence of embankment filling construction on the shield tunnel.In the analysis process,relying on an actual project,the finite element software Plaxis is used to establish the subgrade-tunnel-soil coupling model for the consideration of the displacement and excess pore water pressure.The influence of subgrade construction on the subway shield tunnel is studied,the deformation is analyzed and the relevant conclusion is obtained.The effects can be referenced for the similar projects.

关 键 词：盾构隧道 超孔隙水压力 固结沉降 地层隆起 

分 类 号：U452[建筑科学—桥梁与隧道工程]