岩溶隧道突水机理研究  

Research on Gushing Water Mechanism of Karst Tunnel

作　　者：王青松 WANG Qingsong(China Railway Construction Plateau Tunnel Construction Technology and Equipment R&D Center,China Railway 20 BureauGroup Corporation,Xi’an Shaanxi 710016,China)

机构地区：[1]中铁二十局集团有限公司中国铁建高原隧道施工技术及装备研发中心,陕西西安710016

出　　处：《中国铁路》2023年第4期1-8,共8页China Railway

基　　金：国家重点基础研究发展计划(973)项目(2013CB036003);中铁二十局集团有限公司科研计划项目(YF2000SD01B)。

摘　　要：岩溶隧道修建过程中极易发生突水灾害,是工程界的热点及难点问题。针对岩溶隧道突水机理进行讨论剖析,首先将其概化为灾害源、突水通道形成及防突层岩体破坏3个过程,并将岩溶隧道防突层破坏类型分为整体拉剪破坏、水力劈裂、充填体渗透滑移、关键块体缺失以及综合型突水模式。结合典型案例并利用数值模拟或理论分析对相应的破坏机制进行研究,指出实际工程中的突水多为综合型突水模式,是多种突水类型相互联系、相互作用的综合结果,且不同突水类型在一定条件下存在相关的连续性和递进演化关系。Gushing water disasters are easy to occur during the construction of karst tunnels,which is a hot and difficult problem in the engineering community.The gushing water mechanism of karst tunnel is discussed and analyzed.Firstly,it is generalized into 3 processes:disaster source,formation of gushing water channel and rock mass failure of outburst prevention layer.The failure types of outburst prevention layer of karst tunnel are divided into overall tensile and shear failure,hydraulic splitting,seepage and slippage of filling body,loss of key blocks and comprehensive gushing water mode.With typical cases and using numerical simulation or theoretical analysis to study the corresponding failure mechanism,this paper points out that gushing water in actual engineering is mostly a comprehensive gushing water mode,which is a comprehensive result of the interconnection and interaction of various gushing water types.Under certain conditions,different gushing water types have corresponding continuity and progressive evolution relationship.

关 键 词：岩溶隧道 突水 机理 数值模拟 破坏机制 

分 类 号：U45[建筑科学—桥梁与隧道工程]