Drive through the world's longest spiral tunnel - China Expressway - 4K HDR
Spiral Tunnel Start: 00:23:16
On the morning of October 9, 2022, the world's longest spiral tunnel-Xinjin Expressway Hankou Tunnel held a full-line breakthrough ceremony. Following the completion of the left line of the Hankou Tunnel on September 29, the right line of the tunnel was also successfully completed in the early morning of October 8. After 858 days, the Hankou Tunnel was fully connected, which laid a solid foundation for the official opening of the Xinjin Expressway at the end of the year.
Xinjin Expressway starts from Yingcun, Kuaicun, Dakuai Town, Fengquan District, Xinxiang City, and ends at Yingpan Village, Gujiao Township, Lingchuan County, Shanxi Province. The total length is 69.75 kilometers. A shortcut to Southeast Shanxi. After the opening of Xinjin Expressway, the time from Xinxiang to Jincheng will be shortened from more than 3 hours to more than 1 hour.
Hankou Tunnel is located in the hinterland of Taihang Mountain in Xinxiang. It is the longest of the Xinjin Expressway Spiral Tunnels. The left line is 4,457 meters long, the right line is 4,366 meters long, and the minimum turning radius of the tunnel is 700 meters. It is the longest in the world with a small radius and a large height. The poor spiral tunnel is 229 meters longer than the existing Guinness World Record holder, the Jinjiazhuang Extra Long Spiral Tunnel of the Yanchong Expressway.
The completion of the Hankou Tunnel marks the official completion of the three-story spiral tunnel group of the Xinjin Expressway. Xinjin Expressway Spiral Tunnels and Bridges are 28 kilometers long, all located in the deep mountainous area of South Taihang, with an altitude of 500 meters to 1280 meters. There are 9 tunnels with a drop of 780 meters. The entire spiral tunnel group is like a spiral line, winding up two and a half times in the "belly" of South Taihang Jiaoding Mountain.
Hou Xiangpeng, chief engineer of the Xinjin Expressway Project, introduced that the reason why it is called a spiral tunnel is that the circular curve with a small radius is used in the design of the tunnel, and the problem of climbing the mountainous line is solved in the way of spiral expansion. The difference is 109 meters, which means that the biggest advantage of the spiral tunnel is that it trades length for height.” Although the straight-line distance between the entrance and exit of the tunnel is only 1.9 kilometers, the actual road turns 4.4 kilometers inside the “belly” of the mountain.
Source: Henan Traffic Radio
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