Research on Construction Technology of New Mechanical Connected Steel Arch Anchor in Gas Tunnel

In the installation and construction of complex and weak surrounding rock gas tunnel arch, the fire operation has great safety risks. Based on this, the steel arch mechanical connection positioning system and steel network clip buckle are developed, thus forming a new mechanical connection steel arch anchor injection supportconstruction technology. Among them, 10 cycles were built on the upper steps and 2 arches were installed per cycle. Compared with the conventional fire operation, the cost saving rate reached 9%, and the time saved for each cycle operation was about 0.5 hours, improving the working efficiency of the tunnel circular operation by 3.1%, and providing significant economic benefits, providing reference for similar projects.