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The '''Wushaoling Tunnel''' ({{zh-stp|s=乌鞘岭特长隧道|t=烏鞘嶺特長隧道|p=Wūshāolǐng Tècháng Suìdào}}) is a 21.05
The tunnel has reduced the distance between Dacaigou and Longgou by 30.4 km.<ref name=Intel/> Key to the [[Lanxin railway|Asia-Europe Land Bridge]], the tunnel is part of the 3,651 km section linking [[Lianyungang]] in East China with [[Ürümqi]] in Northwest China.<ref name=AsiaPulse>{{cite news | title = China opens Asia's longest land tunnel railway | work = The Press Trust of India Limited | publisher = Asia Pulse Pty Limited | date = 31 March 2006}}</ref>
The tunnel consists of two bores with centres separated by 40 m. It is designed to allow speeds of 160 km/h.<ref name=Intel/> The tunnel travels through complex geology, involving four regional fault zones and soft rock. The [[New Austrian Tunnelling method]] was adopted as the construction technique. An elliptical cross-section (horseshoe shape) was used for the majority of the tunnel, with a circular section used in the geologically challenging Fault Zone No. 7.<ref name=Yang>{{cite journal | last = Yang | first = J.S. | coauthors = et al. | year = 2006 | month = May-July | title = Interactions of four tunnels driven in squeezing fault zone of Wushaoling Tunnel | journal = Tunnelling and Underground Space Technology | volume = 21 | issue = 3-4 | pages = 359 | doi = 10.1016/j.tust.2005.12.176}}</ref> The right (east-bound) bore was constructed first, while the left tunnel was a parallel drift with smaller diameter to be enlarged later. The gradient is mainly 1.1%. The Wuwei portal has an altitude of 2447 m, and the Lanzhou portal 2663 m. The maximum depth of the tunnel is 1100 m.<ref name=Liu>{{cite journal | last = Liu | first = Zhichun | coauthors = et al. | year = 2006 | month = May-July | title = Synthetical analysis on monitoring of Wushaoling railway tunnel | journal = Tunnelling and Underground Space Technology | volume = 21 | issue = 3-4 | pages = 363–364 | doi = 10.1016/j.tust.2005.12.180 }}</ref>
On 26 June 2003 [[Interfax]] reported that the total investment for the project was [[Renminbi|¥]] 7 billion ($845 million), that the project commenced construction in November 2002 and that is was scheduled to take six and a half years to complete. Also reported was that Chinese steel manufacturer Lingyuan Iron and Steel (Linggang) would provide 4,360 tons of steel products for the tunnel project.<ref name=Interfax>{{cite news | title = Lingyuan Iron & Steel to Supply Steel Products for Asia's Longest Railway Tunnel | publisher = [[Interfax|Interfax Companies & Commodities]] | date = 2003-06-26}}</ref>
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