[Explanation] On October 9th, the opening ceremony of the whole line of the Hankou Extra-long Tunnel of Xinjin Expressway was held in Huixian County, Henan Province, which marked the official launch of the Xinjin Expressway Spiral Tunnel Group, the first three-layer spiral tunnel group in China with a total length of 28 kilometers. built.
[Explanation] Xinjin Expressway is an important expressway connecting Henan and Shanxi provinces in China's Taihang Mountains.
The Xinjin high-speed spiral tunnel group is distributed in the deep mountainous area of the South Taihang Mountains, with a total of 9 tunnels and a height difference of 780 meters.
The Hankou Tunnel that has been penetrated this time is the last tunnel to be penetrated by the tunnel group.
[Concurrent period] Ji Wei, the relevant person in charge of the project construction party
The Hankou Tunnel is 4,457 meters long, which is 229 meters longer than the Jinjiazhuang Extra-long Spiral Tunnel of Yanchong Expressway, the current Guinness World Record holder. It can be said that it is the first extra-long spiral tunnel currently under construction in the world.
Why is it called a spiral tunnel?
Because the design of the Hankou Tunnel adopts a circular curve with a small radius, it solves the problem of climbing the mountain line in the form of a spiral line.
The height difference between the entrance and exit of the tunnel is 109 meters, which means that the biggest beauty of the design is that the length is exchanged for the height.
[Explanation] Why is the Xinjin Expressway Spiral Tunnel Group the first three-layer spiral tunnel group of expressways in China?
Fan Zhiqiang, engineer of the Henan Provincial Transportation Planning and Design Research Institute, introduced it.
[Concurrent] Fan Zhiqiang, engineer of Henan Provincial Transportation Planning and Design Institute
After years of hard work, Xinjin Expressway has built the first three-layer spiral tunnel group in China and even in the world.
Why do you say it's the first?
Compared with the famous Yaxi Expressway in China, the Yaxi Expressway Tow Wushan Tunnel Group surrounds two hills respectively, and each hill is circled to form a double-helix tunnel group. The Xinjin Expressway surrounds the Jiading Mountains of South Taihang. A mountain top circled two and a half times, forming a unique three-layer spiral tunnel group.
[Explanation] The completion of the Xinjin Expressway spiral tunnel group provides a guarantee for the opening of the Xinjin Expressway at the end of this year. At that time, the journey from Henan Xinxiang to Shanxi Jincheng will be shortened by 1 hour.
After the Xinjin Expressway is connected, it will be the main channel connecting Henan and Shanxi provinces for coal, logistics and raw materials.
[Concurrent] Liu Junwei, Secretary of Xinxiang Huixian Municipal Party Committee
After the Xinjin Expressway is completed and opened to traffic, it will greatly improve the traffic conditions between Shanxi and Henan, especially our Hui County.
(Will) effectively promote the development and revitalization of the old revolutionary base area in Taihang Mountain, and effectively promote the integration of culture and tourism in South Taihang, as well as the integration of communication and tourism.
Li Chaoqing, Lu Jiamin, Townsend reported from Henan
Responsible editor: [Luo Pan]