岩溶区深埋隧道施工期突水突泥灾害源超前预报

摘要

With the development of the tunnel construction towards great depth,long track line and strong karst area,wa-ter bursting and mud surging is a kind of geological hazard which is often encountered in tunnel construction.It brings huge security risks and economic losses to the tunnel construction.Therefore,the timely and accurate detection of water bearing structure in front of working face in tunnel and effective measures to take are very important,which can effectively reduce the probability of occurrence of geological disasters in tunnel construction,and it has important significance for the safety of the tunnel construction.Based on the parallel drift way of Maoxian Tunnel in southwest China,and combined with the geo-logical and hydrologic conditions,the TSP,infrared water detecting and induced polarization method has been used for wa-ter bearing structure prediction,with subsequent excavation verification,a good forecast result has been received,which can be taken as a reference for similar engineerings.%随着隧道修建向大埋深、长洞线和强岩溶地区发展，突水突泥灾害已成为岩溶区深埋隧道施工中最常见的地质灾害之一，给隧道建设造成巨大的安全隐患和经济损失。因此，对岩溶区深埋隧道掌子面前方不良地质情况和含水构造进行准确的超前预报，并制定科学的应对措施，可有效地降低突水突泥灾害发生几率，对隧道安全施工具有重要的意义。依托西南地区某铁路茂县隧道一号平导，结合地质水文情况，采用 TSP 地质超前预报、红外探水预报及激发极化法超前预报对掌子面前方一定区域内的含水构造进行超前预报，并经后续开挖验证，较好地印证了预报结论，对类似地质条件下的超前地质预报工作具有一定的借鉴意义。