在役隧道突水突泥病害成因分析及处治对策

Analysis on Causes and Treatment Measures of Water and Mud Inrush in Active Tunnels

为了处治特大暴雨引发的某在役公路隧道的突水突泥病害,通过现场调查对隧道地质构造和病害特征进行分析,确定突水突泥病害类型,并借助ANSYS软件对不考虑水压力、排水系统正常和排水系统失效3种工况下的衬砌结构安全系数进行计算。研究结果表明:该隧道突水突泥病害类型为溶洞溶腔型;处治对策应以排为主,具体措施包括加密横向排水管、扩大中心排水沟和增设沉沙洞。研究成果可为岩溶区新建隧道设计提供参考,为其他在役隧道处治提供借鉴。

In order to deal with the water and mud inrush caused by a heavy rain in an active tunnel,the geological structure of the tunnel and the characteristics of the disease were analyzed through field surveys to determine the type of water and mud inrush.The safety factor of the lining structure was calculated with ANSYS in three conditions of not taking into account water pressure,normal drainage system and drainage system failure.The results show that the type of water and mud inrush in the tunnel is karst cave and cavity,so the treatment measures should be focused on drainage,and specific measures include intensifying horizontal drainage pipes,expanding central drainage ditches,and adding sinkholes.The research results can provide a reference for the design of new tunnels in the karst area and for the treatment of other active tunnels.