Gaoligongshan Tunnel

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]

Gaoligongshan Tunnel
高黎贡山隧道

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]

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]

Notes

1. The length has been reported as 34.586468 km^[2] and 34.538 km.^[4]

References

1. China Railway Tunnel Group Dali–Ruili railway Project Manager (10 July 2016). 大瑞铁路高黎贡山隧道建设宣传片 [Promotional film of Dali–Ruili railway Gaoligongshan Tunnel Construction] (video) (in Chinese). Event occurs at 1minute 42seconds. Retrieved 30 July 2017. 中铁隧道集团承建的大瑞铁路保瑞段二标高黎贡山隧道，自怒江西岸横穿高黎贡山脉，跨龙陵县全境，进入德宏州芒市境内。
2. China Railway Tunnel Group Dali–Ruili railway Project Manager the Second Division (9 April 2017). "中铁隧道集团有限公司大瑞铁路工程项目经理部二分部项目轨线材料招标公告" [Tender notice of trajectory material of China Railway Tunnel Group Dali–Ruili railway Project Manager the Second Division]. www.crecgec.com. 中铁鲁班商务网. Archived from the original on 2 August 2017. Retrieved 31 July 2017.
3. 刘馨蔚 (25 October 2016). "大瑞铁路高黎贡山隧道工程顺利推进" [Construction of Dali–Ruili railway Gaoligongshan Tunnel progressing well]. www.yn.xinhuanet.com. Xinhua Net. Archived from the original on 1 August 2017. Retrieved 31 July 2017.
4. Office of Civil, Hydraulic and Construction Project of China Railway No.2 Group (5 July 2016). "大瑞铁路高黎贡山隧道施工方案暨长大深埋隧道建设方法专家咨询会在云南举行" [Expert consultation meeting of construction program of Dali–Ruili railway Gaoligongshan Tunnel and construction program of deeply-buried long tunnels held in Yunnan]. www.cae.cn. Chinese Academy of Engineering. Archived from the original on 3 September 2017. Retrieved 31 July 2017.{{cite web}}: CS1 maint: numeric names: authors list (link)
5. "大瑞铁路高黎贡山隧道开工 长34.5公里系亚洲最长山岭铁路隧道" [Dali–Ruili railway Gaoligongshan Tunnel start construction, the length 34.5 km make it to be the longest mountain railway tunnel of Asia]. www.guancha.cn. China News Service. Retrieved 31 July 2017.
6. "China to Construct Longest Railway Tunnel in Asia". www.chinatopix.com. Chinatopix.com. 13 May 2014. Retrieved 21 May 2018.
7. "我国铁路第一长隧高黎贡山隧道进入全面施工阶段" [Gaoligongshan, the longest Tunnel of China, entering the comprehensive construction phase]. www.gov.cn. Xinhua News Agency. 28 August 2017. Retrieved 3 September 2017.
8. https://awards.ita-aites.org/images/CTUC_conference/Gaoligongshan.pdf