国内首座大跨度四主缆悬索桥建设迈入钢梁架设阶段

Core Points - The Yanjin Yangtze River Bridge has completed the installation of its first steel beam, marking the construction phase of China's first large-span four-cable suspension bridge [1] - The main span of the bridge reaches 1860 meters, making it the world's first suspension bridge with four main cables of different vertical heights [1][2] - The bridge is a key infrastructure project connecting Huanggang and Ezhou, designed to enhance the transportation network in Hubei Province [2] Construction Details - The first steel beam measures 28.4 meters in length and weighs 830 tons, installed using a 900-ton cable crane [1] - The bridge consists of a total of 69 steel beam segments, with the installation process requiring precise connections to six sets of suspension cables [1][2] - The construction team faced challenges in balancing the load between inner and outer cables due to a height difference of two meters during the installation of the first steel beam [2] Engineering Innovations - To address the challenges of constructing a suspension bridge with different cable heights, extensive data validation and feasibility experiments were conducted prior to construction [2] - The construction method involved installing hydraulic lifting devices on the outer cables, connected to the bottom suspension points of the steel beams, allowing for real-time adjustments to maintain load balance [2] Strategic Importance - The Yanjin Yangtze River Bridge is part of a comprehensive infrastructure project aimed at enhancing the logistics hub in Ezhou, facilitating rapid transit between Huanggang and Ezhou Huahu Airport in just 15 minutes [2] - The completion of the bridge is expected to significantly improve the highway network and river crossing layout in Hubei Province, promoting integrated development in the region [2]