左右洞独立开挖法在地铁双联拱隧道中的应用  

Application on Independent Excavation of Left and Right Tunnel for Double-arch Tunnel Construction

作　　者：刘力[1] 赵德平[1] 惠丽萍[1] 

机构地区：[1]北京市市政工程设计研究总院有限公司,100082

出　　处：《特种结构》2016年第3期74-79,共6页Special Structures

摘　　要：北京地铁15号线清华东站站后折返线区间进入清华大学校园内140m,该段线路线间距5m,采用双联拱隧道。在地铁工程中双联拱隧道常用的施工方法为"中洞法",在本区间提出了一种"左右洞独立开挖法"的新型双联拱隧道工法。将两种施工方法进行综合比较后,首次将"左右洞独立开挖法"用于地铁双联拱隧道的施工。对地铁双联拱隧道这两种施工方法从施工工序、工期,施工中地层和结构变形及结构受力方面进行了综合对比。结果表明,在地铁暗挖法双联拱隧道施工中,应用"左右洞独立开挖法"施工双联拱隧道的地层和结构变形及结构受力均满足要求,节约工期优势较大,为"左右洞独立开挖法"双联拱隧道在北京地铁工程中的应用进行了成功的探索,为类似隧道工程提供了可供参考的借鉴经验。The back-turning line behind Tsinghua east station of Beijing 15 th subway extended 140 meters into Tsinghua University.The track spacing of back-turning line is 5 meters,and the double-arch tunnel was adopted.The center drift method was usually used in subway double-arch tunnel construction,and the independent excavation of left and right tunnel method was adopted first time in this project.The center drift method and new method were comprehensively compared about the construction procedure,the construction time,the settlement of bracing structure and stratum during construction,and the internal force of structure.The results show that,the new method could satisfy the deformation and internal force requirement and has the advantage of saving construction time.This project provides a good reference for independent excavation of left and right tunnel method for subway double-arch tunnel construction in Beijing.

关 键 词：隧道工程 联拱隧道 中洞法 左右洞独立开挖法 

分 类 号：U231.3[交通运输工程—道路与铁道工程] U455.4[建筑科学—桥梁与隧道工程]