崇启公铁长江大桥南引桥城际线最后一个块段浇筑完成

Core Viewpoint - The completion of the final concrete pouring for the southern approach bridge of the Chongqi Railway-Highway Yangtze River Bridge marks a significant milestone in the construction of a new rapid transit corridor between major urban areas in the Yangtze River Delta region [1][5]. Group 1 - The southern approach bridge is located in Qidong City, Jiangsu Province, and features two continuous beams that cross the Changdao Avenue and the South Chao River [1][5]. - The upper layer of the bridge is designated for highways, while the lower layer accommodates high-speed and intercity rail lines, each measuring 830.05 meters in length [1][5]. - The construction involved five piers (S24-S28) for both the high-speed and intercity lines, with two sets of hanging baskets for each pier [1][5]. Group 2 - The bridge's segment over the South Chao River consists of a 2-(2-64)mT continuous beam, divided into 0-12 segments, with the intercity side continuous beam measuring a total of 256 meters [5]. - The 12th segment is a straight section with a height of 4 meters, and both the top and bottom slabs have a thickness of 0.4 meters [5]. - The T-beam cross-section has a flange width of 12.6 meters, with a concrete volume of 102.22 cubic meters and a concrete grade of C50 [5]. Group 3 - The completion of the Chongqi Railway-Highway Yangtze River Bridge is expected to enhance the railway network layout along the Yangtze River, support the coordinated development of the Yangtze Economic Belt, and promote high-quality integration in the Yangtze River Delta [5].