摘要
介绍地铁明挖区间大跨度密排预应力框架箱型隧道技术,该技术涉及土建和预应力专业,施工协调和工序转换相对一般地铁土建施工更为复杂。该施工技术通过在箱型结构内增加环向后张拉预应力密排框架梁,改善箱型隧道结构受力体系,提高箱型隧道结构承载能力,突破现有地铁结构空间限制。
It describes the metro construction technology for tunnel structure with long-span dense-row pre-stressed frame box in open-cut section, construction technology concerns civil engineering and pre-stressed concrete engineering, construction coordination and working process conversion is relatively more complex than ordinary metro civil construction projects. By using the construction techniques, a ring back tensile pre-stressed dense-row framework beam is added within the box structure, to improve the stress system of box-type tunnel structure and improve the carrying capacity of box-type tunnel structure, breaking the space constraints of the existing metro structures.
出处
《现代城市轨道交通》
2012年第4期27-29,33,共4页
Modern Urban Transit
关键词
地铁
箱型隧道
明挖
大跨度
密排框架
预应力
metro, box structure tunnel, open-cut, long-span, dense-rowframework, pre-stress
