深夜，他们在京广高铁“打铁花”

Core Viewpoint - The article highlights the critical maintenance work on the Beijing-Guangzhou high-speed railway during the Spring Festival travel season, emphasizing the importance of track safety and stability for smooth train operations [1][2][3] Group 1: Maintenance Operations - The maintenance team, consisting of 77 workers, conducted track replacement work during the night to ensure safety and efficiency during the peak travel period [1] - The operation involved cutting, grinding, and welding new tracks, utilizing advanced techniques such as flash butt welding to maintain track strength [2] - The team successfully replaced 73 meters of track, completing the work within a tight timeframe, showcasing the precision and skill required in railway maintenance [3] Group 2: Technical Details - The cutting process involved the use of a rail saw, with over 500 bolts removed in under 10 minutes, demonstrating the efficiency of the crew [1] - The welding process reached temperatures of 900 degrees Celsius, ensuring a strong bond between the old and new tracks [2] - After welding, the team conducted thorough inspections of the weld points to ensure safety and compliance with operational standards [3]