Core Points - The installation of the south span steel beams for the Chongqi Railway and Highway Yangtze River Bridge has been successfully completed, marking a significant milestone in the construction process [1] - The main navigation hole steel truss of the bridge measures 992 meters in total length, with a main span of 400 meters and consists of 6 piers [3] - The bridge is a key control project for the Shanghai-Nanjing-Hefei high-speed railway, featuring a dual-layer design for both road and rail use [8] Summary by Sections - **Construction Progress** - The last steel beam for the south span, weighing 933.71 tons, has been installed, and the next steps include the installation of support structures and bridge deck panels [6] - The south span pushing operation is expected to be completed by late November, with the main navigation hole piers anticipated to be connected by May next year [6] - **Bridge Specifications** - The bridge spans a total length of 4.09 kilometers and crosses the northern channel of the Yangtze River estuary [8] - The upper layer accommodates a six-lane highway with a speed limit of 100 km/h, while the lower layer supports a high-speed railway with speeds of 350 km/h and an intercity railway at 250 km/h [8] - It is recognized as the world's largest span double-tower, double-cable-stayed railway and highway bridge without ballast track [8]

Core Points - The successful installation of the E25 segment steel beam marks a significant milestone in the construction of the Chongqi Railway and Highway Yangtze River Bridge, which is a key project for the Shanghai-Nanjing-Hefei high-speed railway [1][3] - The total length of the main navigation hole steel truss beam is 992 meters, with the Shanghai side comprising 512.4 meters and weighing 18,743 tons [3] - The bridge features a dual-layer design for both rail and road use, with the upper layer accommodating a six-lane highway and the lower layer supporting high-speed rail and intercity rail [5] Summary by Sections - **Construction Progress** - The E25 segment steel beam, weighing 523.9 tons and measuring 12.5 meters, has been successfully installed, contributing to a total weight of over 20,000 tons for the main navigation hole beams [1] - A total of 13 segments have been installed, with plans to complete the edge span installation in November [3] - **Bridge Specifications** - The Chongqi Railway and Highway Yangtze River Bridge spans 4.09 kilometers and crosses the northern channel of the Yangtze River estuary [5] - It is recognized as the world's largest span dual-tower, dual-cable-stayed bridge with ballastless track for both rail and road [5] - **Future Developments** - The main bridge's mid-span closure is expected to be achieved in the first quarter of next year [3]