郑万铁路重庆段岩溶隧道平行导坑快速施工关键技术

Key Techniques for Rapid Construction of Parallel Heading of Karst Tunnel in Chongqing Section of Zhengzhou-Wanzhou Railway

岩溶隧道施工中,为超前探明前方地质状况,解除突泥涌水造成的工程地质灾害,以及进一步增开正线工作面,实现"平行导坑超前,长隧短打"和满足工期目标的目的,以郑州至万州高速铁路小三峡隧道工程为例,对岩溶隧道平行导坑如何进行快速施工组织管理进行探讨,主要从改善进洞条件、调整施工组织、克服反坡施工困难、优化施工方案等方面进行了总结,得出的结论可为类似隧道工程建设提供借鉴和参考。

In order to understand the geological conditions in front of working face,to deal with the geological di⁃saster caused by mud burst and water flow,to further add additional working face to realize advance parallel heading and sectioned construction and to meet the goal of construction period,taking the Xiaoshanxia tunnel of Zhengzhou-Wanzhou high speed railway as an example,construction organization and management of rapid construction of par⁃allel heading of karst tunnel are discussed mainly from the aspects of improving the entry conditions,adjusting the construction organization,overcoming the construction difficulties of adverse slope,optimizing the construction scheme and so on.