方斗山隧道岩溶水文地质条件及危险性研究  

Karst Hydrogeology and Risk Research on Fangdoushan Tunnel

作　　者：徐正宣[1] 彭芬[2] XU Zhengxuan PENG Fen(China Railway Eryuan Engineering Group Co. ,Ltd. , Chengdu 610031 ,China Sichuan University of Media and Communications,Chengdu 611743,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]四川传媒学院,成都611743

出　　处：《高速铁路技术》2017年第4期28-33,共6页High Speed Railway Technology

摘　　要：方斗山隧道是渝利铁路的控制性工程,是全线高压富水岩溶隧道的代表性工程,其地质构造及岩溶水文地质条件较为复杂,有必要查清该隧道的岩溶水文件地质条件。文章通过对该岩溶隧道的含水层岩性组合特征、可溶岩体系分布特征及岩溶水系统性的研究,得出以下结论:(1)隧址区岩溶地下水可分为3个水文地质单元。(2)预测隧道正常涌水量Q=63 000 m3/d,雨季较大涌水量按正常涌水量的数倍计算。(3)隧道可溶岩段内岩溶涌突水危险性主要为高危险区。(4)采用"绕、靠、抬"的地质选线原则,可降低隧道涌突水的风险及对隧道的危害程度。As a representative project of the high-pressure and rich-water karst tunnel, Fangdoushan tunnel of Chongqing-Liehuan Railway is the control engineering work. Sinkhole, shaft, karst spring, underground rivers, the high pressure of groundwater all contribute to complicated conditions for geological structure and karst hydrogeology, so that it is necessary to verify the karst hydrogeological conditions for the tunnel. Based on the systematic study of lithology association characteristics of aquifer stratum, the distribution of soluble rock system and the karstic water, the following conclusions can be drawn ： （ 1 ） The karst groundwater in the tunnel area can be divided into three hydrogeological units. （2） The normal tunnel water inflow shall be expressed by Q = 63 000 m3/d, and the gushing water in the rainy season will be number of times. （3） The risk of karst water gushing is mainly high in the carbonate rock section of tunnel. （4） By adopting the principle of geo-seleetion of ＂ winding, supporting and lifting＂, the risk of tunnel gushing and the damage to the tunnel are reduced.

关 键 词：渝利铁路 方斗山隧道 岩溶水文地质条件 危险性分级 

分 类 号：U25[交通运输工程—道路与铁道工程]