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 for underwater structural assessments [1]. 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]. - Recently, the team has been conducting thorough inspections of underwater bridge piers in the cold winter, employing a combination of human divers and advanced technology [3]. Group 2: Technological Advancements - Two years ago, the team began using unmanned detection boats, and this year they have introduced an underwater detection robot that can navigate like a fish and adhere to bridge piers, utilizing high-definition cameras and sonar for rapid scanning and precise anomaly marking [4]. - The robot has improved efficiency by allowing for the cleaning of aquatic vegetation on bridge piers, which previously required manual labor from divers [4]. Group 3: Inspection Process - During inspections, any anomalies detected by the robot require verification by human divers, who must wear heavy diving gear and navigate murky waters with low visibility to assess the condition of the concrete [5]. - The inspection process is physically demanding, with divers needing to rotate every 20 minutes due to the cold water conditions [5]. Group 4: Achievements and Future Plans - The inspection of the bridge took two days and revealed that any detected cracks were within normal limits, indicating the structural integrity of the bridge [7]. - Since its establishment in 2016, the team has inspected over 400 railway bridges across the country, covering a cumulative distance of over 100,000 kilometers [7].

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].

Core Viewpoint - The inspection and maintenance of the Hukun High-speed Railway Xiangjiang Grand Bridge are crucial for ensuring the safety of high-speed rail and shipping, especially during the busy Spring Festival travel period. Group 1: Inspection Process - The Hukun High-speed Railway Xiangjiang Grand Bridge spans approximately 4500 meters and is a key navigational bridge on the Xiangjiang River [1] - The inspection team utilizes advanced technologies such as unmanned detection boats, drones, and underwater robots to conduct thorough checks of the bridge's external environment and structure [1][2] - The use of unmanned detection boats enhances safety and efficiency, allowing for high-precision measurements of the riverbed and reducing the risks associated with underwater operations [1] Group 2: Technological Advancements - Drones are employed to inspect hard-to-reach areas of the bridge, capturing detailed images of potential structural issues such as concrete cracks and rust on steel structures [2] - Underwater robots can operate in turbulent waters and reach depths of over 200 meters, effectively covering traditional inspection blind spots [2] - The overall inspection time has been significantly reduced from a full day to just two hours, while also providing more accurate data to ensure traffic safety during peak travel times [2]