Core Points - The Chengda-Wanzhou High-Speed Railway (成达万高铁) has successfully completed the key construction milestone of the Quxi River Grand Bridge, which is a significant step towards its completion [3] - The bridge is the world's largest double-track high-speed railway prestressed concrete low-tower cable-stayed bridge, with a main span of 278 meters and a total length of 557.5 meters [3] - The construction team utilized innovative techniques such as the "suspension method" and conducted the final segment during nighttime to minimize temperature-induced structural deformation [3] Construction Progress - The Quxi River Grand Bridge is part of the challenging "4 tunnels and 4 bridges" control project along the Chengda-Wanzhou High-Speed Railway [3] - Currently, 130 out of 136 tunnels along the railway have been completed, with bridge construction at 86% and roadbed construction at 96% [3] - The project is now entering the phases of ballastless track, station building, and electrical engineering [3]

Core Viewpoint - The successful completion of the Quxiang Grand Bridge marks a significant milestone for the Chengdu-Dazhou-Wanzhou high-speed railway project, enhancing the infrastructure of China's high-speed rail network [1] Group 1: Project Details - The Quxiang Grand Bridge, constructed by China Railway Fifteenth Bureau, spans a total length of 1983.81 meters, with the main bridge being a prestressed concrete cable-stayed bridge measuring 557.5 meters [1] - The project team implemented a scientifically efficient construction plan, optimizing concrete pouring timing and mix design to achieve millimeter-level precision in the connection of the bridge segments [1] Group 2: Strategic Importance - The Chengdu-Dazhou-Wanzhou high-speed railway is a crucial part of the national "eight vertical and eight horizontal" high-speed rail network, with a total length of approximately 477 kilometers [1] - Once operational, the travel time from Chengdu to Chongqing via Dazhou will be reduced from around 5 hours to under 2 hours, significantly improving connectivity in the region [1]