千米级顶推，毫米级精度！崇启公铁长江大桥钢梁顶推圆满完成

Core Viewpoint - The successful completion of the last 7 meters of the steel beam push for the Chongqi Railway and Highway Yangtze River Bridge marks a new record in construction technology for similar bridges in China, showcasing advanced engineering capabilities and providing valuable experience for future projects [1][3]. Group 1: Construction Details - The non-navigation hole bridge consists of 11 steel beams with a total length of 1205.4 meters and a total weight of 38,900 tons, constructed in 13 rounds of pushing [3]. - The main navigation hole spans 992 meters, with two side spans on each of the 3rd and 4th piers, utilizing segmental lifting, welding, and pushing techniques [3]. - The final push of 7 meters was completed successfully, with subsequent work planned for the installation of steel beams at the mid-span piers [3]. Group 2: Technological Innovations - The project team developed a multi-point adaptive synchronous pushing control system, enabling intelligent operation and precise positioning of the steel beams [3][5]. - During the pushing process, strict monitoring ensured that beam displacement did not exceed 20mm, with adjustments made to maintain accuracy within 10mm for subsequent segments [3][5]. - The construction utilized advanced techniques for temperature-induced displacement control and real-time monitoring, contributing to the overall success of the project [5]. Group 3: Project Significance - The Chongqi Railway and Highway Yangtze River Bridge is a key project for the Shanghai-Chongqing Railway, enhancing connectivity in the Yangtze River Economic Belt and supporting high-quality integrated development in the Yangtze River Delta [9]. - The bridge serves as an important part of the national "Eight Vertical and Eight Horizontal" high-speed railway network, facilitating passenger flow between major urban areas [9].