摘要
结合成昆铁路永仁至广通段扩能工程大树村隧道出口三线大跨铁路隧道施工,阐述了"四台阶九步开挖法"在三线大跨铁路隧道白垩系上统江底河组上杂色泥岩地层(k2j3含盐岩)施工中的合理运用,有效控制了施工大变形,确保施工安全;与CD、CRD施工法相比,节省了部分临时支护工程量,提高了工效,降低了施工及管理成本,取得了良好的经济效益。
Combined with the Dashucun three-lane large cross-section tunnel construction in Yongren-Guangtong expansion project of Chengdu-Kunming Railway, this paper expounded ＂four-bench nine-step excavation method＂ applied in the construction of three-lane large cross-section railway tunnel under the variegated mudstone strata （ k2j3 salt-bearing rock） of the upper Cretaceous river formation, which effectively controlled the large deformation of construction and ensured the construction safety. Compared with CD and CRD construction technology, it had saved partial temporary supporting workload, enhanced the work efficiency, reduced the construction and management cost, and obtained a good economic efficiency.
作者
曹树强
Cao Shuqiang(China Railway 19th Bureau Group Second Engineering Co. Ltd. , Liaoyang Liaoning 111000, China)
出处
《铁道建筑技术》
2016年第9期1-4,8,共5页
Railway Construction Technology
基金
中铁十九局集团第二工程有限公司2015年科技研发项目(J15-8)
关键词
铁路隧道
三线大跨
四台阶九步开挖法
railway tunnel
three-lane large cross-section
four-bench nine-step excavation method
