中国国内首次——应用AI，在运营铁路桥上精准换梁

Core Insights - The application of artificial intelligence (AI) in the replacement of railway bridge beams marks a significant milestone in China's railway construction, showcasing a new approach for upgrading existing railways [1][2] - The project at Keqiao Station involved replacing concrete beams with steel box beams, necessitated by the expansion from two to four tracks, highlighting the complexity and technical challenges of the construction [1][2] Group 1: AI Implementation - The project utilized AI technology to achieve millimeter-level precision in beam placement, representing the first instance of such technology being applied to operational railway bridges in China [1] - A digital twin technology was employed to create a 3D model, allowing for real-time data collection from 40 high-precision sensors to ensure accurate monitoring and control throughout the construction process [1] Group 2: Construction Achievements - During the construction, a total of 4,086 tons of old beams were successfully removed, and 4,389.6 tons of new beams were installed, with vertical and horizontal deviations maintained within 2 mm and 3 mm, respectively [2] - The project team developed a high-precision finite element analysis model for full-process simulation, filling a technological gap in the field [2] Group 3: Regional Impact - The Shaoxing Intercity Railway, which utilizes the existing Xiaonong Railway, includes Keqiao Station as a newly constructed elevated intercity station, expected to enhance the integration and development of Hangzhou, Shaoxing, and Ningbo [2]