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Gaoligongshan Tunnel
Railway tunnel in Yunnan, China / From Wikipedia, the free encyclopedia
Gaoligongshan Tunnel or Gaoligong Mountain Rail Tunnel[6] (Chinese: 高黎贡山隧道) is a 34.5 km (21.4 mi)[Note 1] tunnel between Nujiang Station and Longling Station on the Dali–Ruili railway in Yunnan, China.[4] It passes through the entirety of Longling County and then into Mangshi.[1] Upon completion, it will be the longest mountain railway tunnel in Asia.[5]
Quick Facts Overview, Line ...
![]() Construction site at the end of tunnel | |
Overview | |
---|---|
Line | Dali–Ruili railway |
Location | Longling County, Yunnan[1] |
Coordinates | 24°38′57.8″N 98°49′39.4″E |
Status | Under construction |
System | China Railway |
Crosses | Gaoligong Mountains |
Start | West bank of Nu River in Longling County[1] |
End | Nanwazidi (南凹子地) in Longling County[2] |
Operation | |
Work begun | 1 December 2015; 8 years ago (2015-12-01)[3] |
Owner | China Railway |
Technical | |
Design engineer | China Railway Tunnel Group[4] |
Length | 34.5 km[Note 1] |
No. of tracks | Single-track railway[2] |
Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
Operating speed | 140 km/h |
Highest elevation | 2,340 m[2] |
Lowest elevation | 640 m[2] |
Water Depth | 1,155 m[5] |
Grade | 23.5‰ (biggest)[2] |
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The tunnel is the key project of Yunnan–Burma railway between Dali and Ruili.[4]
Construction started on 1 December 2015.[3] The tunnel boring machine "Colorful Cloud No.1"(Chinese: 彩云一号) began work on 28 August 2017.[7] The expected completion date for 1st phase is 31 May 2022, for a cost of CN¥ 3.628 billion[3] and 30 November 2025 for the 2nd phase.[8]