守护了全国400多座桥梁的“铁路蛙人”有啥秘密武器？

Core Viewpoint - The article highlights the role of the underwater inspection team from China Railway Jinan Bureau in ensuring the safety of railway bridges during the Spring Festival travel rush, utilizing advanced technology such as underwater robots for inspections [1][4]. Group 1: Underwater Inspection Team - The underwater inspection team is the only specialized railway underwater detection team in China, responsible for the inspection and maintenance of underwater structures of railway bridges nationwide [1]. - The team has been conducting underwater inspections since 2016 and has inspected over 400 railway bridges, covering a total distance of more than 100,000 kilometers [9]. Group 2: Technological Advancements - The team has incorporated unmanned detection boats and underwater robots into their operations, enhancing the efficiency and accuracy of inspections [3]. - The underwater robot can navigate like a fish and adhere to bridge piers, using high-definition cameras and sonar to quickly scan and identify anomalies [3]. Group 3: Inspection Process - The recent inspection of the underwater piers of the new Yanzhou Railway bridge involved a comprehensive check, previously reliant on manual labor [4]. - The inspection process includes the use of robots to clear aquatic vegetation from bridge piers, which previously required divers [6]. - After the robotic inspection, divers are still needed to verify any anomalies detected by the robot, highlighting the combination of technology and human expertise in the inspection process [6]. Group 4: Working Conditions - Divers face challenging conditions, including cold water and low visibility, requiring them to work in heavy suits for limited periods [6][8]. - The inspection of the bridge took two days, and the findings indicated that any detected cracks were within normal limits [9].