南大梁高速公路华蓥山隧道地质特征分析

位于川东平行岭谷区的南大梁高速公路华蓥山隧道是一座典型的山岭特长岩溶隧道，地形地质条件复杂，隧道建设面临煤层瓦斯、采空区、有害气体、断裂破碎带、石膏及岩溶角砾岩、岩溶与岩溶涌突水等特殊地质问题。在对华蓥山隧道地质条件进行论述的基础上，重点针对煤层瓦斯和岩溶涌突水问题进行对比分析，总结隧道勘察和施工地质问题。

Analysis on Geological Characteristics of Huaying Mountain Tunnel on Nandaliang Expressway

The Huaying Mountain Tunnel of the Nandaliang Expressway in the parallel valley area of Chuandong is a typical mountain long karst tunnel, with complex geological conditions. The tunnel construction faces special geological problems such as coal seam gas, goaf area, harmful gas, fracture zone, gypsum and karst breccia, karst and karst surge water. On the basis of discussing the geological conditions of Huaying Mountain Tunnel, the comparison and analysis of coal seam gas and karst surge water are emphasized, summarizing the geological problems of tunnel survey and construction.