The 1,011Km Ya’an-Nyingchi bullet train section, consisting of 95.8% of tunnels and bridges, is under construction
Active landsides, avalanches, earthquakes...but nothing can stop Chinese engineers and construction workers
The Ya’an-Nyingchi section runs 1,011 kilometres and includes 26 stations, of which the total length of bridge and tunnel is 965.74 kilometers, and the bridge-to-tunnel ratio is as high as 95.8%. In particular, there are 72 new tunnels with a total length of 851.48 kilometers. In other words, the section from Ya'an to Nyingchi was built on a bridge in addition to being built in a tunnel, and there are very few railways paved on flat ground.
What is particularly difficult is that among the 72 tunnels with a total length of 851.48 kilometers from Ya'an to Linzhi, there are many extra-long tunnels with a length of more than 30 kilometers, of which the longest tunnel is the Yigong Tunnel of 42.5 kilometers. The Sejila Mountain Tunnel started this time has a total length of 37.9 kilometers, surpassing the Xinguanjiao Tunnel (32 kilometers in total length), which is known as the "first railway tunnel in China". In addition, the Duomuge Tunnel is 36 kilometers long, Zeduoshan Tunnel is 32.8 kilometers, Zila Mountain Tunnel is 32.7 kilometers, Mila Mountain Tunnel is 29.4 kilometers, Yela Mountain Tunnel is 28.6 kilometers, Haizishan Tunnel is 25 kilometers, and Boshu Laling Tunnel is 25 kilometers. 23.6 kilometers and so on. Most of these tunnels are built on the roof of the world, in iceberg canyons, and are completely beyond the difficulty level of all existing construction projects on the earth.
The total investment of the project is as high as 319.8 billion yuan ( $50 billion USD). The total investment of the project is as high as 319.8 billion yuan ( $50 billion USD), averagely ￥300 million （$47 million）per kilometer, rivaling the cost of the construction of city subways per kilometer, will become the world most expensive railway per kilometer construction cost wise.
Active landsides, avalanches, earthquakes...but nothing can stop Chinese engineers and construction workers
The Ya’an-Nyingchi section runs 1,011 kilometres and includes 26 stations, of which the total length of bridge and tunnel is 965.74 kilometers, and the bridge-to-tunnel ratio is as high as 95.8%. In particular, there are 72 new tunnels with a total length of 851.48 kilometers. In other words, the section from Ya'an to Nyingchi was built on a bridge in addition to being built in a tunnel, and there are very few railways paved on flat ground.
What is particularly difficult is that among the 72 tunnels with a total length of 851.48 kilometers from Ya'an to Linzhi, there are many extra-long tunnels with a length of more than 30 kilometers, of which the longest tunnel is the Yigong Tunnel of 42.5 kilometers. The Sejila Mountain Tunnel started this time has a total length of 37.9 kilometers, surpassing the Xinguanjiao Tunnel (32 kilometers in total length), which is known as the "first railway tunnel in China". In addition, the Duomuge Tunnel is 36 kilometers long, Zeduoshan Tunnel is 32.8 kilometers, Zila Mountain Tunnel is 32.7 kilometers, Mila Mountain Tunnel is 29.4 kilometers, Yela Mountain Tunnel is 28.6 kilometers, Haizishan Tunnel is 25 kilometers, and Boshu Laling Tunnel is 25 kilometers. 23.6 kilometers and so on. Most of these tunnels are built on the roof of the world, in iceberg canyons, and are completely beyond the difficulty level of all existing construction projects on the earth.
The total investment of the project is as high as 319.8 billion yuan ( $50 billion USD). The total investment of the project is as high as 319.8 billion yuan ( $50 billion USD), averagely ￥300 million （$47 million）per kilometer, rivaling the cost of the construction of city subways per kilometer, will become the world most expensive railway per kilometer construction cost wise.
