世界最大跨度双层斜拉-悬索协作大桥主塔封顶

Group 1 - The construction of the Jingzhou Libu Yangtze River Bridge has reached a significant milestone with the completion of the main towers, marking a key progress in the project [3] - The bridge features the world's largest span of 1120 meters and utilizes a double-layer cable-stayed and suspension collaborative system [3] - The project team faced challenges such as ultra-high precision control and temperature control to prevent cracking in large volume concrete during the main tower construction [3] Group 2 - The Jingzhou Libu Yangtze River Bridge is approximately 7.9 kilometers long and integrates high-speed rail, expressway, and urban road functions [7] - It is designed to accommodate a high-speed rail track with a smoothness requirement for speeds of 250 km/h, while also supporting complex traffic loads from six lanes of expressway and four lanes of primary highway [7] - The bridge is expected to be completed by May 2027, playing a crucial role in advancing the construction of a strong transportation nation and optimizing the layout of the national and Hubei province's high-speed rail and highway networks [7]