Core Insights - The Tuojiang Grand Bridge, a key project of the Chengdu-Chongqing High-Speed Railway, successfully completed its main beam closure on November 10, marking a significant milestone in its construction [5][8] - The Chengdu-Chongqing High-Speed Railway is expected to be completed and operational by the end of 2027, with a maximum operational speed of 400 km/h, earning it the title of "the fastest high-speed railway on land" [5][9] Innovation in Design - The bridge features a world-first structural design that combines the large span of an arch bridge with the stability of a beam bridge, allowing for a unique "no thrust" self-balancing structure [6][7] - The main beam closure utilized a tensioning method, where the two sides of the bridge were gradually pulled together, requiring 12 hydraulic jacks exerting a force of approximately 5400 tons [7] Construction Techniques - The construction team employed advanced digital technologies for precise closure, achieving a positioning error within millimeters, likened to "embroidery in the air" [8] - A monitoring information system was developed to track critical data such as displacement and tension during the construction process, ensuring real-time adjustments and high precision [8] Project Progress - Following the bridge's closure, track laying is set to begin in May next year, indicating a significant acceleration in the overall construction of the Chengdu-Chongqing High-Speed Railway [9] - The railway line, part of China's "eight vertical and eight horizontal" high-speed rail network, spans 292 kilometers and connects key urban areas in Sichuan and Chongqing [9]

Core Viewpoint - The completion of the main beam of the Tuojiang Grand Bridge marks a significant milestone in the construction of the Chengyu Central High-Speed Railway, which is expected to be operational by the end of 2027, reducing travel time between Chengdu and Chongqing to 50 minutes [1] Group 1: Project Details - The Tuojiang Grand Bridge, located in Shizhong Town, Jianyang City, has a total length of 1,252 meters [1] - The bridge features an innovative design with a "Feiyan" style double-row bearing no thrust arch bridge structure, enhancing stability and balance [1] - Construction utilized virtual assembly technology for precise simulations, ensuring accurate completion of the bridge [1] Group 2: Construction Progress - Following the completion of the bridge, the project will move on to the construction of the bridge deck and auxiliary facilities, with track laying expected to start in May next year [1] - The overall progress of the Chengyu Central High-Speed Railway is on track, with key projects including "two tunnels and one bridge" advancing according to schedule [1] Group 3: Strategic Importance - The Chengyu Central High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting major cities along the Yangtze River [1] - The railway line spans 292 kilometers, starting from Chongqing North Station and leading to Chengdu Station [1]