崇启公铁长江大桥南引桥高铁线跨长岛大道连续梁合拢

Core Viewpoint - The successful completion of the continuous beam for the high-speed rail line at the southern approach of the Chongqi Railway and Highway Yangtze River Bridge marks a significant milestone in the construction of this critical infrastructure project, which is expected to enhance connectivity in the Yangtze River Delta region [1][4][7]. Group 1: Project Details - The Chongqi Railway and Highway Yangtze River Bridge is located in Qidong City, Jiangsu Province, featuring an upper layer for highways and a lower layer for high-speed and intercity rail lines, with a total length of 830.05 meters and 19 piers [4]. - The continuous beam that has successfully completed spans the Long Island Avenue, with dimensions of (36.625 + 56 + 36.625) meters, utilizing a variable cross-section prestressed concrete design [4]. - The bridge's box girder has a top width of 12.6 meters, a bottom width of 6.7 meters, and varying heights, with the central section reaching 4.335 meters [4]. Group 2: Strategic Importance - The Chongqi Railway and Highway Yangtze River Bridge is a key node in the high-speed rail network connecting Shanghai, Nanjing, and Hefei, with a total length of 4.09 kilometers [7]. - Upon completion, the bridge will establish a rapid new corridor between the Shanghai metropolitan area, Nanjing metropolitan area, and Hefei metropolitan area, significantly optimizing the railway network layout along the Yangtze River [7]. - The project is expected to facilitate the coordinated development of the Yangtze Economic Belt and promote high-quality integration in the Yangtze River Delta region [7].