双层双跨平顶直墙暗挖地铁风道二次衬砌施工关键技术  

Key Technology for Construction of Secondary Lining of Mined Metro Ventilation Gallery with Double Story,Double Span,Flat Roof and Upright Wall

作　　者：杨威虎[1] 杜江[1] 刘焕强[1] 

机构地区：[1]中铁电气化局西安工程公司

出　　处：《隧道建设》2008年第4期465-468,488,共5页Tunnel Construction

摘　　要：大断面双层双跨平顶直墙暗挖地铁风道施工时具有开挖跨度相对较大,临时支护体系繁多,二次结构受力转换复杂的特点,针对北京地铁4号线石榴庄路站1#风道双层段的工程实践,分析总结大断面双层双跨平顶直墙结构中洞法开挖、受力转换、分块模筑等施工的几个关键技术环节,经实践检验,方案是合理的,可行的。The construction of mined Metro ventilation gallery with large cross-section, double storey, double span, flat roof and upright wall has such features as relatively large excavation span, complex temporary support system and complex load-shifting of the secondary lining structure. Taking the construction of the double-storey section of No. 1 ventilation gallery of Shiliuzhuang Road Station on Line 4 of Beijing Metro as example, the authors summarize the key construction technology for the ventilation gallery with large cross-section, double storey, double span, flat roof and upright wall in terms of central drift excavation method, load shifting and section-by-section construction of the in-situ cast concrete lining. The project practice shows that the construction plan is reasonable and feasible.

关 键 词：双层双跨平顶直墙 暗挖 二衬模筑 受力转换 地铁风道 换撑 拆除 

分 类 号：U231.3[交通运输工程—道路与铁道工程]