世界最大跨度公铁两用大桥首节钢梁成功架设

Core Points - The Xiangmen Railway's Xihoumen Bridge is a significant infrastructure project, marking the successful installation of the world's widest segment steel beam, measuring 68 meters wide, indicating progress from foundation work to superstructure construction [1][3] Group 1: Project Overview - The Xihoumen Bridge is a public-railway dual-use bridge, part of the Ningbo-Zhoushan Railway and Ningbo-Zhoushan Expressway, connecting Jintang Island and Cezi Island [3][5] - The bridge spans 3,118 meters, with a main span of 1,488 meters, utilizing a cable-stayed and suspension system [3] - The design incorporates a "public-railway flat layer" to minimize wind resistance, and features a three-box separation main beam structure for enhanced wind stability [3] Group 2: Construction Details - The segment steel beam installed weighs 979 tons, with auxiliary lifting equipment adding another 1,600 tons, equivalent to over 1,000 small cars [4] - The bridge's construction involves complex steel beam installation plans, requiring three different schemes to adapt to varying support systems, with completion expected by 2027 [4] - Advanced technologies such as BIM, digital twin models, and various sensors are employed for real-time monitoring and management of the construction process [4]