Due to the weaksurroundingrock, high ground stress. easy collapse and big deformation, the construction of tunnels with mudstone were very difficult.
泥岩隧道围岩软弱,地应力强烈,易坍塌大变形,修建困难。
2
The interaction between soft-weakSurroundingRock and initial support of deep buried tunnels has become one of the most important subjects in underground engineering research.
深埋隧道软弱围岩与初期支护的相互作用是地下工程研究的重要课题之一。
3
The time factor problems of tunnel surroundingrock vs. supporting system in weak formation are analysed and the reasonable supporting time is broadly explored with rheological theory.