摘要
针对某高原地区水利项目413.28 m^2特大断面导流洞工程,现场使用了6种不同的开挖方法,经实践,"改进型上导洞开挖施工方法"最适合此类地质及环境。项目隧洞结构矢跨比为0.3,拱部挠度大,洞身围岩复杂破碎,岩层裂隙水丰富,边顶拱处易塌落。结合施工中隧洞边顶拱处塌落的处理,研发了一种高原地区特大断面边顶拱塌腔支护系统,对以后类似施工有着一定的借鉴意义。
Aiming at a water conservancy project in plateau area of 413. 28 m2 super-large section diversion tunnel engineering, six different kinds of excavation methods are adopted at the scene, ＂modified by practice on pilot tunnel excavation construction method＂ is most suitable for this kind of geological and environment. The span ratio of＂ the project tunnel structure is 0.3, the arch has a large deflection, the surrounding rock is complex and broken, thc rock fracture water is abundant, and the edge arch is prone to collapse. In combination with the settlement of the roof arch of the tunnel in the construction, the paper has developed a support system for the roof areh collapse cavity in the high altitude area, whith hascertain reference significance for similar construction in the future.
作者
王亮
Wang Liang(China Railway 21st Bureau Group Sixth Engineering Co. Ltd. , Beijing 101111, China)
出处
《铁道建筑技术》
2018年第3期90-92,97,共4页
Railway Construction Technology
基金
中铁二十一局集团有限公司科研开发项目(15B-6)
关键词
特大断面隧道
高原地区
开挖支护
塌腔
super-large section tunnel
plateau area
excavation and support
collapse cavity
