华东地区最大跨度跨高铁单T构梁实现转体

Core Viewpoint - The successful completion of the 2×100 meter prestressed concrete single T beam rotation marks a significant milestone in the construction of the Shanghai-Nanjing-Hefei high-speed railway, laying a solid foundation for the line's connectivity and track-laying [1][3]. Group 1: Project Details - The cross-King-Hu high-speed railway bridge spans approximately 17.6 kilometers and crosses multiple major transportation lines, including the King-Hu high-speed railway and Tianqian Expressway [3]. - The control engineering feature, the 2×100 meter rotating single T beam, weighs 17,000 tons and intersects the busy King-Hu high-speed railway at an angle of 26.3 degrees, presenting challenges such as large tonnage, large span, small rotation angle, high precision requirements, and complex construction environment [3]. Group 2: Technological Innovations - To ensure the stability and precision of the beam rotation, the project team established a youth technical research team that innovatively applied dynamic balance weighting methods and a spherical hinge precise positioning traction system [3]. - An intelligent monitoring system was utilized to monitor the rotation posture and stress changes in real-time, successfully controlling the axial deviation to the millimeter level [3]. Group 3: Strategic Importance - The Shanghai-Nanjing-Hefei high-speed railway is a crucial segment of the eastern section of the Shanghai-Chongqing-Lanzhou high-speed railway and an important part of the national "eight vertical and eight horizontal" high-speed railway network along the Yangtze River [5]. - Upon completion, the railway will optimize the railway network layout in the Yangtze River region, support the coordinated development of the Yangtze River Economic Belt, and promote high-quality development in the Yangtze River Delta [5].