崇启公铁长江大桥北引桥下层铁路梁现浇施工完工

Core Viewpoint - The successful completion of the last segment of the movable formwork for the intercity side of the Chongqi Railway and Highway Yangtze River Bridge marks a significant milestone in the construction process, paving the way for the subsequent upper highway beam construction [1][3]. Group 1: Construction Progress - The Chongqi Railway and Highway Yangtze River Bridge has a total length of 1,069.27 meters, featuring a dual six-lane upper highway and a lower section for double-track high-speed rail and intercity rail [3]. - The last concrete beam poured was for the intercity side NC20-NC21 pier, measuring 40.6 meters in length and 12.2 meters in width, with a total concrete volume of 344 cubic meters [3]. - The use of a movable formwork system allows for segmental pouring of concrete beams between bridge piers, significantly shortening the construction cycle and minimizing environmental impact [3]. Group 2: Winter Construction Preparations - To prepare for the final segment of the movable formwork pouring, the project team avoided low-temperature periods below zero degrees Celsius and held special briefing sessions to optimize the construction plan [2]. - Technical personnel monitored concrete temperature throughout the process to ensure compliance with quality standards, and winter construction safety training was conducted to address equipment operation, anti-freezing measures, and emergency rescue protocols [2]. Group 3: Strategic Importance - The Shanghai-Nanjing-Hefei high-speed railway is a crucial part of the eastern segment of the Huhang Railway and an important component of the national "Eight Vertical and Eight Horizontal" high-speed railway network, enhancing passenger flow along the Yangtze River corridor [5]. - The completion of this project will establish a rapid new corridor between the Shanghai, Nanjing, and Hefei metropolitan areas, optimizing the railway network layout in the Yangtze River region and supporting the coordinated development of the Yangtze Economic Belt [5].