世界公路工程第一大沉井正抓紧施工 汉南长江大桥建成后将打通都市圈环线高速

Core Viewpoint - The construction of the Han Nan Yangtze River Bridge is progressing rapidly, with significant advancements in the sinking of the anchor caissons and the foundation work for the main tower, aiming for completion by the end of 2027 to enhance connectivity in the Wuhan metropolitan area [1][2]. Group 1: Construction Progress - Over 80 workers are engaged in the sinking operation of the anchor caisson, which weighs hundreds of tons, utilizing a giant crane for precise placement into a caisson that reaches a depth of 43 meters [1]. - The anchor caisson is described as the "cornerstone" of the bridge, consisting of a caisson and anchor body that bear the immense tension of the bridge cables, with a structure resembling a square honeycomb [1]. - The first anchor caisson has sunk to a depth of 5 meters, with the southern anchor caisson already reaching 15.8 meters, and the project is on track for completion by the end of the year [1]. Group 2: Project Specifications - The Han Nan Yangtze River Bridge is the 13th bridge over the Yangtze River in Wuhan, designed as a double-tower single-span steel box girder suspension bridge with a main span of 1600 meters, built to accommodate a dual eight-lane highway with a design speed of 120 km/h [2]. - The bridge and its connecting roads are expected to be completed and open to traffic by 2027, facilitating a one-hour commuting circle among cities such as Wuhan, Xiaogan, Xianning, Ezhou, and Huanggang [2]. - The ongoing construction of the 12th Yangtze River bridge, the Shuangliu Yangtze River Bridge, has seen both main towers capped and is transitioning to steel box girder installation, with an expected completion date in March 2026 [2].