施工技术 2011年10月下 CONSTRUCTION TECHNOLOGY 第40卷第351期 通省特长隧道软岩大变形机理及处治措施 沈峰,成词峰2,刘桂兵 (1.湖北省高速公路集团有限公司,湖北武汉4300512.中国地质大学工程学院,湖北武汉430074 3.中铁十七局集团第三工程有限公司,河北石家庄050081) 摘要]在现场调研及隧道监控量测的基础上,研究了十至房县高速公路通省隧道施工中出现的大变形问题,通 过分析该隧道大变形破坏的特点,从围岩岩性条件、工程结构受力和施工因素等方面对该隧道的大变形机制进行 了研究。结果表明通省隧道发生大变形的主导因素是隧道所处的地质环境和软弱围岩,而施工开挖卸荷是产生大 变形的诱因。结合研究成果提出针对大变形段的治理措施,监控量测结果表明该治理措施取得较好效果。 关键词】隧道工程;软岩变形;监测 中分类号]U213 文献标识码]A [文章编号】1002-8498(2011)20-0046-04 Mechanism and Control Measures of Large Deformation of Tongsheng Tunnel Shen Feng' ,Cheng Cifeng ,Liu Guibing ( 1.Hubei Expressway Co ..Wuhan ,Hubei 430051 ,China ;2 .Faculty of Engineering ,China University of Geosciences ,Wuhan ,Hubei 430074 ,China ;3 .CR17BG No .3 Engineering Co ..Shijiazhuang ,Hebei 050081 ,China ) Abstract :Based on field investigation and monitoring measurement ,the large deformation of Tongsheng tunnel on Shiyan-Fangxian Highway is studied .By analyzing the features of deformation and failure of the tunnel ,the mechanism of large deformation is discussed from surrounding rocks conditions ,construction factors and construction .It is found that the special geological environments and soft surrounding rocks caused the large deformatio...