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瓦窑坡隧道施工地质条件非常复杂,存在岩溶、冲沟浅埋段和破碎带等不良地质现象。其中,岩溶是本隧道施工的最主要地质问题。根据隧道地质、地形条件及不良地质现象,隧址属构造剥蚀中低山区,地表溶蚀强烈,见多处岩溶漏斗,根据瓦窑坡隧道施工的特点,以地质法为基础,以TGP206地质超前预报系统为主要手段,结合地质雷达和钻探等地质超前预报综合技术,进行岩溶地质超前预报。开挖结果证明,瓦窑坡隧道综合地质超前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。
The geological conditions for the construction of Wawupo Tunnel are very complex with some unfavorable geological phenomena such as karst, shallow buried sections of gully and broken belt. Among them, karst is the most important geological problem in this tunnel construction. According to tunnel geology, topographic conditions and adverse geological phenomena, the tunnel belongs to the middle and low eroded denudation tectonics, surface erosion is intense, see a number of karst funnels, according to the characteristics of the construction of the tunnel, Huayupo geological method, with TGP206 advanced geological prediction System as the main means of combining karst geological advance prediction with the comprehensive geological prediction technology such as geological radar and drilling. Excavation results show that the application of comprehensive geological forerock forecasting technique in Wawoupo Tunnel is basically successful and worthy of reference in the geological prediction of similar tunnel construction.