Line has 70 tunnels, One tunnel over 40km long
https://www.scmp.com/news/china/science/article/3156253/chinas-sichuan-tibet-rail-project-full-steam-fans-and-ice
Heat from Earth’s crust forces engineers to cool things down on the most challenging rail construction in history, including 70 tunnels through remote terrain.
https://www.scmp.com/news/china/science/article/3156253/chinas-sichuan-tibet-rail-project-full-steam-fans-and-ice
Sichuan-Tibet rail project cuts through rocks too hot for humans, machines
www.scmp.comHeat from Earth’s crust forces engineers to cool things down on the most challenging rail construction in history, including 70 tunnels through remote terrain.