世界最大跨度双层斜拉—悬索协作大桥主塔封顶

Core Viewpoint - The completion of the main towers of the Jingzhou Libu Yangtze River Bridge marks a significant milestone in its construction, paving the way for subsequent cable and catwalk installations [3][7]. Group 1: Bridge Specifications and Features - The Jingzhou Libu Yangtze River Bridge has a main span of 1,120 meters, making it the world's largest double-deck cable-stayed and suspension bridge collaboration system [3]. - The bridge spans approximately 7.9 kilometers and integrates high-speed rail, expressway, and urban road functionalities [7]. - The design accommodates a high-speed rail track with a smoothness requirement for speeds of 250 km/h, while also supporting a complex load from six lanes of expressway and four lanes of primary highway traffic [7]. Group 2: Construction Challenges and Timeline - The project team faced significant construction challenges, including ultra-high precision control and temperature control to prevent cracking in large volume concrete [3]. - The bridge is expected to be completed by May 2027, contributing to the development of a robust transportation network in the Yangtze River Economic Belt and optimizing the layout of national and Hubei province's high-speed rail and highway networks [7].