en.Wedoany.com Reported - On June 2, a 26,000-ton double-width curved swivel bridge on the Changjin section (Changfu to Jinyushi section of the Shanghai-Kunming Expressway) of the Shanghai-Kunming Expressway, constructed by China Railway Shanghai Engineering Bureau under China Railway Group Limited, was successfully rotated above the busy Shanghai-Kunming Railway, achieving precise positioning with millimeter-level accuracy.
The Changjin section of the Shanghai-Kunming Expressway is a key horizontal corridor in Jiangxi Province's road network plan. It starts in Changfu Town, Zhangshu City, and ends in Jinyushi, Heyao Town, Xiangdong District, Pingxiang City, with a total length of approximately 179.5 kilometers. It is constructed to an eight-lane dual carriageway standard with a design speed of 100 km/h. China Railway Shanghai Engineering Bureau is responsible for four railway-related single structures in the reconstruction and expansion section and three railway-related single structures in the new construction section. The construction scope includes the construction of swivel T-shaped rigid frames, continuous beams, and trough beams, as well as the demolition and reconstruction of old bridges, and the prefabrication and erection of T-beams.
The curved bridge rotated this time is the heaviest double-width single T-shaped rigid frame synchronous swivel curved bridge in Jiangxi Province, and it is also the only 10,000-ton-level railway-related swivel bridge on the Changjin section, located in Yuanzhou District, Yichun City. The bridge adopts a separated left and right T-shaped rigid frame structure, with each single width measuring 130 meters in length. After splicing, the total width of the double width is 36.7 meters, with a total weight of approximately 26,000 tons, a curve radius of 1,500 meters, and a rotation angle of 90 degrees. The construction process faced challenges such as short effective working time, high risks adjacent to operational railway lines, large self-weight of the beam body, and extremely high requirements for attitude control accuracy.
Once the Changjin section of the Shanghai-Kunming Expressway is completed and opened to traffic, it will effectively enhance the traffic efficiency and service capacity of the Shanghai-Kunming Expressway, improve the comprehensive transportation network in western Jiangxi, strengthen the interconnection among Yichun, Xinyu, and Pingxiang, enhance the region's ability to undertake industrial transfers, and provide transportation support for the integrated development of western Jiangxi and the coordinated high-quality development of the Yangtze River Economic Belt and the Yangtze River Delta region.
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