铁道标准设计2017，Vol.61Issue(2)：73-77,5.DOI:10.13238/j.issn.1004-2954.2017.02.017
复杂环境下大跨地铁风道结构建造方案研究
A study on Construction Scheme of Large Span Subway Duct Structure under Complex Environment
摘要
Abstract
The “top-down” and “down-top” methods are the two main construction methods used for subway duct structure. The subsidiary subway duct of Dahongmenqiao-Heyi interval tunnel of Beijing metro line 8 is taken as the research background to solve the existing problems involved in traditional PBA ( Pile-Beam-Arc ) construction method. A new construction method is proposed, which suggests that the first layer and the second layer of the subway duct are constructed with the “down-top”method. The different construction methods of subway duct are analyzed with 3-D numerical simulation. In view of the difficulties in controlling the strata subsidence and the characteristics of large-span excavation, a new combination supporting structure is proposed. The engineering practice indicates that the new construction method can effectively control the surface subsidence and the combination supporting structure can effectively control the strata subsidence resulted from the large-span middle pilot tunnel excavation.关键词
地铁/大跨风道/PBA工法/结构施工方案/拱部中导洞/联合支护结构Key words
Subway/Large span duct/construction method/Structure construction scheme/Middle pilot tunnel of arch/Combination supporting structure分类
交通工程引用本文复制引用
刘雪峰,马宁,宋少奇,胡少斌,李增光..复杂环境下大跨地铁风道结构建造方案研究[J].铁道标准设计,2017,61(2):73-77,5.基金项目
北京城乡建设集团有限责任公司科技研究开发计划项目(2015-01) （2015-01）
