北京地下直径线前三门隧道上跨地铁联络通道及电力隧道设计方案研究  

Design of Qiansanmen Tunnel of Beijing Underground Rail Transit Line Crossing above Existing Metro Connection Gallery and Existing Power Tunnel

作　　者：郭剑勇[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《隧道建设》2014年第2期147-152,共6页Tunnel Construction

摘　　要：为解决在特定的城市地下空间新建隧道施工影响既有地下结构安全的问题,以北京地下直径线前三门隧道上跨既有隧道工程为研究对象,提出"隔离桩保护,分步开挖"设计方案,模拟隧道分步开挖过程,计算隧道施工过程中联络通道的位移值。主要结论如下:隧道采用相应的保护措施和分步施工法是可行的,施工不会影响联络通道及电力隧道的结构性安全。Qiansanmen tunnel of Beijing Underground Rail Transit Line crosses above existing Metro connection gallery and existing power tunnel. The design scheme of ＂isolating pile protection and sequence excavation＂ is proposed for the tunnel. The sequence excavation of the tunnel is simulated, and the displacement of the existing Metro connection gallery during tunnel construction is calculated, so as to guarantee the safety of the existing structures in the urban area. Conclusions drawn are as follows： The scheme of isolating pile protection and sequence excavation adopted is feasible and that the safety of the existing Metro connection gallery and the existing power tunnel can be guaranteed.

关 键 词：北京地下直径线 地铁联络通道 电力隧道 临时路面支撑 隔离桩防护 结构安全模拟计算 

分 类 号：U45[建筑科学—桥梁与隧道工程]