深埋长大隧道围岩分类评价的探讨与应用

DISCUSSION ON CLASSIFICATION AND EVALUATION OF SURROUNDING ROCK OF DEEP SEATED LONG TUNNELS

随着国内外深埋长大隧道规模的增大和工程项目的增多，其围岩分类、评价愈显重要和迫切。深埋长大隧道地质环境条件复杂，施工前期勘探工程量少、控制程度低，其围岩分类、评价极为困难。在总结当前隧道围岩分类、评价方法的基础上，针对其目前存在的问题及不足，结合具体工程，探讨了深埋长大隧道围岩分类、评价的实现方法问题。

With more and more deep seated long tunnels getting larger in scal at home and abroad,the surrounding rock classification and evaluation have become more important and urgent.the classification and evaluation surrounding rock of deep seated long tunnels are very difficult in the earlier stage of exploration and constrcution,because of complicated geoenvironmental conditions and less explorating work.In is paper,the authors summarize the current methods of surrounding rock classification and evaluation of tunnels and point out the existing problems and defeets in this aspect.The methods of surrounding rock classification and evaluation of deep seated long tunnel are discussed with specific engneering projects.