According to China Railway Shanghai Group Co., Ltd., in the early hours of today, at the construction site of the continuous girder of the Tongtaiyang Bridge spanning the Beijing-Shanghai Expressway, the final batch of concrete was poured into the formwork, marking the smooth closure of the 128-meter continuous girder of the Tongtaiyang Bridge spanning the Beijing-Shanghai Expressway on the Shanghai-Nanjing-Hefei High-Speed Railway. The project has achieved breakthrough progress, laying a solid foundation for subsequent girder erection and track-laying construction. The newly built Shanghai-Nanjing-Hefei High-Speed Railway is the eastern section of the Shanghai-Chongqing-Chengdu High-Speed Railway and an important component of the Yangtze River high-speed railway corridor of the national "Eight Vertical and Eight Horizontal" high-speed railway network. It undertakes the transport of main network passenger flows along the Yangtze River corridor, as well as part of the passenger flows from the coastal and Beijing-Shanghai corridors directly to Shanghai. See details below↓

The continuous girder of the Tongtaiyang Bridge spanning the Beijing-Shanghai Expressway on the Shanghai-Nanjing-Hefei High-Speed Railway is located within the territory of Yangzhou City, with a total length of 272 meters and a span arrangement of (72+128+72) meters. The continuous girder is a double-track prestressed concrete continuous box girder, with a top width of 12.6 meters and a bottom width of 7 meters. It crosses the Beijing-Shanghai Expressway, which carries heavy traffic, and is characterized by a tight schedule, high safety risks, strict precision requirements, great construction technical difficulty, and a complex surrounding environment. It is one of the key and difficult projects of the Shanghai-Nanjing-Hefei High-Speed Railway project.

The continuous girder of the Tongtaiyang Bridge spanning the Beijing-Shanghai Expressway has been smoothly closed.

The project construction team, for the first time on the entire line, adopted the large-segment cantilever pouring construction method, adjusting the maximum pouring segment length from 3 meters to 6 meters, reducing the originally designed 17 cantilever pouring segments to 10. A new type of underslung smart bridge-building machine was used for construction, increasing construction efficiency by 20%.

Schematic diagram of the route alignment of the Shanghai-Nanjing-Hefei High-Speed Railway.

The newly built Shanghai-Nanjing-Hefei High-Speed Railway is the eastern section of the Shanghai-Chongqing-Chengdu High-Speed Railway and an important component of the Yangtze River high-speed railway corridor of the national "Eight Vertical and Eight Horizontal" high-speed railway network. It undertakes the transport of main network passenger flows along the Yangtze River corridor, as well as part of the passenger flows from the coastal and Beijing-Shanghai corridors directly to Shanghai. Once completed, the project will establish a new rapid corridor among the Shanghai metropolitan area, the Nanjing metropolitan area, and the Hefei metropolitan area. It is of great significance for building a "Yangtze River Delta on Rails," optimizing the layout of the railway network in the Yangtze River region, serving the coordinated development of the Yangtze River Economic Belt, and promoting the integrated high-quality development of the Yangtze River Delta.