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Jinjiazhuang Tunnel (Chinese: 金家庄隧道) or Jinjiazhuang Spiral Tunnel (Chinese: 金家庄螺旋隧道), is the world's longest highway spiral tunnel. [1] [2] The spiral has a curve radius of 860 metres (2,820 ft) and the elevation difference between the tunnel entrance and exit is 112 metres (367 ft).
There are four classes of road tunnels in China by length. [1]Super-long tunnel (>3,000m) Long tunnel (1,000m-3,000m) Middle-tunnel (250m-1,000m) Short tunnel (<250m) By 2012, there are 10,022 road tunnels and 8,052.7 km in total length in mainland China, including 441 super-long tunnels with 1,984.8 km in total length and 1,944 long tunnels with 3,304.4 km in total length.
#5 Tunnel, Yellow River Diversion to Shanxi South Line Shanxi, China 26,000 m (16.156 mi) 2002 See South–North Water Transfer Project: Metro Daegu Metro: Line 1: Daegu, South Korea 25,900 m (16.094 mi) 1997–2002 Metro MRT Blue Line: Bangkok, Thailand 25,800 m (16.031 mi) 2004 Second phase opened in September 2019 Railway Single Tube
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Jinjiazhuang Tunnel; K. Kjernfjelltunnelen; M. Mælefjell Tunnel This page was last edited on 12 August 2020, at 18:15 (UTC). Text is available under the Creative ...
The tunnel, concealed with wooden panels and hidden access through a sewer, measured approximately 300 meters on the Mexican side, with dimensions of 1.80 meters in height and 1.20 meters in width.
Qingdao Jiaozhou Bay Tunnel is an under-sea road tunnel located in Qingdao, Shandong Province in eastern China. It crosses underneath Jiaozhou Bay , connecting Huangdao District to the south with Shinan District in the north at the narrow entrance to the bay.
A report written by a Georgetown University team led by Phillip Karber conducted a three-year study mapping out China's complex tunnel system, which stretches 5,000 km (3,000 miles). The report determined that the size of the Chinese nuclear arsenal is understated and as many as 3,000 nuclear warheads may be stored in the tunnel network.