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The Jinjiazhuang Special Long Spiral Tunnel on the Yan-Chong Expressway
Pubdate :2025-05-22
The Jinjiazhuang Extra-long Spiral Tunnel on the Yan-Chong Expressway is a key project of the 2022 Beijing Winter Olympics and is a separated extra-long tunnel. The left side of the tunnel is 4,228 meters long and the right side is 4,104 meters long. The maximum burial depth of the tunnel is approximately 314.5 meters. In 2019, it was certified by Guinness World Records as the "world's longest highway spiral tunnel".
