tunnels

Combined with Sujiayan Tunnel of Zhengzhou-Wanzhou High-speed Railway，a set of mechanized supporting and optimization schemes suitable for the excavation of a full section tunnel in weak surrounding rock is summarized．It can be obtained through field practice that improving the drilling-blasting

Mechanization of tunnel construction has become an important direction for the development of tunnel construction． Based on the construction of Dading Tunnel of Zhu-Zhao High-speed Ｒailway，the characteristics of mechanized tooling equipment involved in the standardized process of tunnel

The construction of an extra-long and large cross-section highway tunnel is the key for entire construction period in expressway. To ensure construction quality and improve construction progress, the principles for supporting large-scale mechanized equipment, such as matching with geological

Aiming at complicated geological conditions, large buried depth, excessive toxic and harmful gases,and high altitude in Sichuan⁃Tibet region, through investigation and analysis of the current situation of large⁃scale mechanical construction equipment in a certain section of Sichuan⁃Tibet Railway

Three-arm drilling trolley is the most advanced special equipment for mountain drilling and drilling technology，especially for soft and broken geological tunnel． In this paper，taking Sanleng mountain tunnel for example，for the characteristics of tunnel surrounding rock more broken，excavation section