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, currently under construction, 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]
| Gaoligongshan Tunnel 高黎贡山隧道 | |
|---|---|
Construction site at the end of tunnel | |
 Interactive map of Gaoligongshan Tunnel 高黎贡山隧道 | |
| Overview | |
| Line | Dali–Ruili railway |
| Location | Longling County, Yunnan[1] |
| Coordinates | 24°38′58″N 98°49′39″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 began | 1 December 2015[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 |
| Max elevation | 2,340 m[2] |
| Min elevation | 640 m[2] |
| Water Depth | 1,155 m[5] |
| Grade | 23.5‰ (biggest)[2] |
Upon completion, it will be the longest mountain railway tunnel in Asia.[5] The tunnel is the key project of Dali–Ruili 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]