武隆隧道岩溶地质超前预报综合技术

Synthesis prediction technology of karst geology in Wulong tunnel

武隆隧道全长9418m,为渝怀铁路第二长大隧道。该隧道的施工地质条件非常复杂,存在浅埋段、断层破碎带、岩溶暗河、非煤系地层瓦斯和岩爆等不良地质现象。其中,岩溶、暗河以及岩溶涌水是本隧道施工的最主要地质问题。根据岩溶垂直分带结果,武隆隧道处于混流带中,特别是多在季节变动带与水平迳流带之间。自隧道开挖揭露以来,多次发生大型、特大型岩溶涌水灾害。作者根据武隆隧道施工的特点,以地质法为基础,以HSP声波反射法为主要手段,结合TSP203系统和钻探等的超前预报综合技术,进行岩溶地质超前预报。实践证明,武隆隧道综合地质预报技术的应用是基本成功的,值得在同类隧道施工地质预报中借鉴。

Wulong Tunnel is the second long tunnel of Chongqing-Huaihua Railway, in which karst geology is one of the main characteristics. According to the specialty of the tunnel construction program, to solve karst geologic problem, the synthetical prediction technology is selected, which looks geologic method as the basis, the method of Horizontal & Holes Sound Probing in tunnel(HSP) as the main method, also using TSP203 and drilling method. In fact, the synthetical prediction technology is generally successful, and is worthy of reference for other similar tunnel construction geologic prediction.