运用CFG桩处理水工隧洞塌方的技术措施  

Application of CFG piles in treatment of tunnel collapse

作　　者：王全玉 周利全 

机构地区：[1]云南水投牛栏江滇池补水工程有限公司,云南昆明650051

出　　处：《人民长江》2013年第12期63-65,共3页Yangtze River

摘　　要：在牛栏江-滇池补水工程大五山隧洞施工时,于桩号35+313～35+323段浅埋洞段出现塌方,塌方后尝试过几种处理方法,均未凑效。经仔细分析,采取地表处理、掌子面封堵、修排桩墙、造超前大管棚、筑锁口混凝土,对塌方段采取开挖与支护相结合的综合处理措施,成功处理了塌方。探索出了一套适合于粉细砂、泥炭质土、有机质土、草煤、淤泥等软塑土体洞段的塌方处理施工技术,对类似工程施工具有指导意义。Collapses happened in some shallow - buried tunnel sections during construction of Dawushan Mountain tunnel, a part of Niulan River - Dianehi Lake Water Supplement Project, and several treatment methods were applied but failed to treat the collapse. After rigorous investigation, combined measures such as surface treatment, plugging at tunnel face, building of row - pile wall, assembling of pre - pipe roof and blockade concrete were adopted and the tunnel collapse was treated successfully. The presented n^easures are effective for soft soil body containing fine sand, peat soil, organic soil and sludge.

关 键 词：软塑土 CFG桩 塌方处理 大五山隧洞 牛栏江-滇池补水工程 

分 类 号：TV672[水利工程—水利水电工程]