weak surrounding rock

There are potential safety hazards in the full-section excavation method of tunnels in soft surrounding rock, especially the unpredictability of tunnel face collapse and block falling conditions, which will bring great personal and life threats to construction workers. The Yulongshan Tunnel of the

In order to apply mechanized drilling and blasting method for large-section tunnel construction in weak surrounding rocks， construction technologies of rock drilling and arch installation were studied based on Laifu tunnel of Chongqing-Kunming high speed railway. Through the renovation of the

The construction technology of mountain tunnel in China is under-developed. Hence,the mechanized construction method for large cross-sectional tunnel on high-speed railway is introduced. A new kind of tunnel construction organization mode with four tunnel construction lines,i.e. excavation,support

In order to ensure the safety and quality of the construction of Zhengzhou-Wanzhou high-speed railway tunnel and shorten the construction schedule of the tunnel,the large cross-section construction method by triple-boom rock drilling jumbo is put forward.And then proper transformations for the jumbo