60℃钢轨上 “钢轨医生”进行一场“热辣”手术

Core Viewpoint - The article highlights the challenges faced by railway workers, particularly during high-temperature conditions, as they perform essential maintenance on the railway tracks to ensure safe and efficient train operations [3][6][14]. Group 1: Working Conditions - The Shandong Meteorological Station issued a high-temperature orange warning, indicating extreme heat conditions affecting workers on the front lines [1]. - Railway workers, such as Zhang Qingzhi and his team, are exposed to temperatures exceeding 60 degrees Celsius while performing maintenance tasks [3][6]. - Despite the harsh conditions, workers are committed to their duties, utilizing specific time windows for maintenance to avoid train operations [3][6]. Group 2: Maintenance Operations - Zhang Qingzhi's welding team is responsible for inspecting and repairing over 700 kilometers of railway lines approximately every 30 days, addressing any damaged tracks immediately [5][6]. - The maintenance process involves multiple detailed steps, including rust removal, precise alignment, and high-temperature welding, ensuring the accuracy of track placement within 1 millimeter [8][10]. - After welding, the team must also perform meticulous grinding and measuring to maintain precision within 0.1 to 0.4 millimeters [12]. Group 3: Importance of Maintenance - The maintenance of the railway tracks is crucial, especially during peak travel seasons, to prevent issues such as "thermal expansion displacement" caused by high temperatures [6]. - The successful completion of maintenance tasks is vital for the safety and stability of train operations, with workers expressing satisfaction in their contributions despite the challenging conditions [14].