Recently, the incremental launching of the bridge spanning the Yingshan-Dazhou Expressway on the Ankang–Chongqing section of the Xi’an–Chongqing High-Speed Railway , constructed by China TIESIJU Civil Engineering Group, was successfully completed. The bridge is the nation’s first large-span high-speed railway tied-arch bridge featuring a network hanger system, laying a solid foundation for the railway’s on-schedule opening.
The bridge is located in Dazhou, Sichuan Province, with a total length of 443.1 meters. After departing from Dazhou South Station, the Xi’an–Chongqing High-Speed Railway crosses the Yingshan-Dazhou Expressway via a bridge system comprising three structures: the mainline bridge and the left and right connecting-line bridges. To enhance structural stiffness, an innovative network hanger system was adopted to achieve improved load distribution and more rational force transmission. The steel girder-arch structure was assembled integrally on the embankment outside the bridge and incrementally launched into position via asymmetrical temporary piers alongside the expressway, minimizing interference with expressway operations to the greatest extent possible.
The mainline of the Kangyu Section of the Xi’an–Chongqing High-Speed Railway spans 478 kilometers, starting from Ankang West Station and passing through Ankang City in Shaanxi Province; Chengkou County in Chongqing; Dazhou and Guang’an in Sichuan Province; and Hechuan and Beibei districts in Chongqing, before being introduced into Chongqing West Station at the Chongqing railway hub.
