Stduy on index selection of surroundingrockclassification for cohesive soil tunnel;
围岩质量分类是隧道及地下工程领域重要的技术工作之一。
2
Tunnel surroundingrockclassification history mainly on railways was introduced and analyzed; the surroundingrockclassification is the basic data for tunnel construction.
围岩分级是隧道建设的基础资料，对以铁路为主的隧道围岩分级历史作简要回顾。
3
The classification of surroundingrock was mainly adopted for the stability of the cavern in order to analyze the stability of surrounding cavern and evaluate developed rule of rock explosion.