鄂北地区水资源配置工程浅埋隧洞冒顶塌方处理分析  

Analysis of treatment measures for roof fall and collapse of a shallow-buried tunnel in North Hubei Water Transfer Project

作　　者：沈晶 潘亚辉 SHEN Jing;PAN Yahui(Hubei Institute of Water Resources Survey and Design,Wuhan 430070,China)

机构地区：[1]湖北省水利水电规划勘测设计院,湖北武汉430070

出　　处：《水利水电快报》2021年第8期48-51,共4页Express Water Resources & Hydropower Information

摘　　要：浅埋隧洞开挖受不良地质条件、长时间降雨及施工不当等因素影响,易发生地表塌陷,导致隧洞冒顶事件。介绍了鄂北地区水资源配置工程花儿山隧洞冒顶塌方处理,根据现场地形地质情况综合分析,采取洞内掌子面处喷混凝土封闭后地表塌陷处回填压实,然后以超前大管棚和新奥法施工处理。实际施工中,开挖时能够安全通过此段隧洞。研究成果可为此类浅埋输水隧洞冒顶塌方处理提供参考。During the excavation of shallow-buried tunnel,due to unfavorable geological conditions,long-time rainfall,improper construction and other factors,the surface collapse is likely to occur,which may lead to tunnel roof fall.This paper introduces the accident treatment of Huaershan tunnel in North Hubei Water Transfer Project.According to the comprehensive analysis of the site topography and geology,the construction measures were put for⁃ward,in which,the surface collapse was backfilled and compacted after the tunnel face was closed with shotcrete.By using treatment measures of advanced large pipe-shed and NATM construction,the tunnel was passed through safely during the excavation,which can provide reference for the collapse treatment of shallow water conveyance tunnel.

关 键 词：浅埋隧洞 冒顶塌方 掌子面封闭 超前大管棚 鄂北地区水资源配置工程 

分 类 号：TV554[水利工程—水利水电工程]