The Gangmula Mountain Tunnel is located in the Tibet Autonomous Region. It is one of the control projects of the entire Lalin Railway. The tunnel is located in the seismic zone and is a national high-risk tunnel. Geothermal, rock burst, and faults are the main problems of the tunnel construction. The total length of the tunnel is 11660 meters, of which the single-line tunnel is 11357 meters long, the station tunnel is 303 meters long, and the maximum buried depth is 1800 meters.