Location: Tianjin New Area Central Avenue
Construction date: 2011
With a length of 4.2 km, Central Avenue in Haihe River tunnel connecting Dongxi Tanggu  with the north shore of Yujiabao Financial District as the main road. The project consists of 3 immersed tunnel units with a total length of 255 meters, whose unit weighs 3 million tons each. Each unit’s scale is 36.6 meters width, 9.65 meters high and 85 meters long. An axis dry dock was applied for prefabrication of those units. As scecond largest immersed tunnel in China mainland,The Haihe River tunnel is sixth immersed tunnel currently under construction, Guangzhou Salvage is responsible for the transporting and immerse works of the tunnel units.