China has just holed through the world's longest undersea highway tunnel: 17.5 kilometres beneath a bay, bored by a shield machine wider than a five-storey building
China has finished shield tunnelling for the Jiaozhou Bay Second Subsea Tunnel. This new 17.48-kilometer tunnel will significantly improve Qingdao's transport links. A giant slurry-balance shield machine named "Hai Tian" bored through the seabed. Engineers overcame high water pressure and difficult geology during construction. The tunnel is expected to cut travel time between Qingdao and Huangdao significantly.
China has finished shield tunnelling for the Jiaozhou Bay Second Subsea Tunnel. This new 17.48-kilometer tunnel will significantly improve Qingdao's transport links. A giant slurry-balance shield machine named "Hai Tian" bored through the seabed. Engineers overcame high water pressure and difficult geology during construction. The tunnel is expected to cut travel time between Qingdao and Huangdao significantly.
