Domestic largest diameter hard rock boring machine off the assembly line

"Caiyun" boring machine off the assembly line

According to reports, the "Caiyun" TBM cutter head has an excavation diameter of 9.03 meters. While the equipment meets the need for rapid rock-breaking, it has also carried out many innovations in terms of strengthening auxiliary construction methods. It has "all kinds of martial arts in one." Geological tectonic movement is active and geological conditions are complex in southwestern Guizhou, especially in Gaoligong Mountain. It is difficult to construct by ordinary drilling and blasting method. It is the first time that the construction of the world's most advanced large-diameter open tunnel hard rock boring machine is used in the southwestern region.

Darui Railway is an important part of the China-Burma International Railway Passage of the Trans-Asian Railway (West Line) in the national "One Belt and One Road" program. It is of great significance for Yunnan and even its neighboring countries to realize cross-border cooperation and interconnection and speed up the development of ethnic minority border areas. The Gaoligongshan Tunnel started construction on December 29th, 2014 and is a total length of 34.538 km. It is a key control project of the Darui Railway. The maximum depth of the tunnel is 1,155 meters, the average depth is 800 meters, and the geological conditions are complex and changeable. Rare in the country. (Xue Dan)