世界在建最长高速铁路跨海大桥建设取得新进展

Core Viewpoint - The successful installation of a 626-ton steel beam marks a significant milestone in the construction of the Hangzhou Bay Cross-Sea Railway Bridge, which is a key project for the Nantong to Ningbo High-Speed Railway [1] Group 1: Project Overview - The Hangzhou Bay Cross-Sea Railway Bridge is a critical component of the Nantong to Ningbo High-Speed Railway, featuring three navigation bridges and a total length of 29.2 kilometers [1] - The bridge is designed for a speed of 350 kilometers per hour and is currently the longest and highest-standard cross-sea high-speed railway bridge under construction globally [1] Group 2: Technical Details - The North Navigation Bridge is a 450-meter main span steel box-steel truss cable-stayed bridge, with two main towers (No. 8 and No. 9) and a total length of 932.7 meters, making it the largest span ballastless track cable-stayed bridge under construction in the world [1] - The design and construction challenges of this bridge are relatively rare among similar types of bridges in China [1] Group 3: Safety Measures - The Jiaxing Maritime Bureau has established a "data + precision + drill" comprehensive guarantee mechanism to ensure construction safety, including precise work window predictions and tailored simulation lifts for each beam [1] - The use of VTS, drones, and patrol boats provides full-scale control during the lifting process [1] Group 4: Future Impact - The Hangzhou Bay Cross-Sea Railway Bridge is expected to be completed and operational by 2027, ending the lack of railway access in Haiyan, Zhejiang, and significantly reducing travel time between cities in the Yangtze River Delta [1] - This project will contribute to the establishment of a "one-hour traffic circle" and further promote regional collaborative development [1]