What is the reason for the collapse of the railway bridge near Tianjin South Ring Road?

At K+4300m of Lingang Railway, during the maintenance of Tianjin-South Ring Railway Bridge, a sleeper replacement accident occurred. In the collapse accident, rescuers sent underwater robots and frogmen into the water to determine the position of the trapped people for rescue. Recently, it was reported that 8 people were killed, 1 person was seriously injured and 5 people were slightly injured in the collapse accident of Tianjin South Ring Port Railway Bridge.

After the accident, Li, secretary of Tianjin Municipal Committee, deputy director of the State Council Safety Committee, secretary of Party Committee of Emergency Management Department, minister of transportation, deputy secretary of Tianjin Municipal Committee, mayor, party secretary and director of the State Railway Administration, and other leading comrades gave instructions, demanding that all efforts be made to treat the wounded, thoroughly investigate the cause of the accident and seriously investigate the responsibility. According to the accident investigation report, the judicial organs have taken compulsory measures against 1 1. Among them, Wang, deputy general manager of Tianjin South Ring Railway Maintenance Co., Ltd., Chang, workshop director of Wanma Works Section, and Li, workshop director of Dagang Works Section, were arrested according to law, and the remaining eight people were released on bail pending trial by public security organs. 26 people were subject to administrative sanctions and admonishing conversations.

The accident investigation has also been disturbed and hindered by human beings. After the accident, Deputy General Manager Liu of Tianjin South Ring Railway Maintenance Co., Ltd. in charge of safety work and his subordinates fabricated a construction plan for replacing bridge sleepers for accident investigation, and pretended to sign the construction plan, which seriously interfered with the accident investigation. At the same time, it also exposed some problems, such as the imperfect basic safety management system of relevant units, the chaotic construction safety management of business lines, the lack of reconstruction project management, the failure to implement the project construction management system, and the inadequate joint venture railway management. The person in charge of the construction site has been controlled by the public security organ, and the cause of the accident is under investigation.

This accident is a very rare type of accident. The accident in Tianjin happened when changing sleepers. The site construction unit is Tianjin South Ring Railway Maintenance Co., Ltd. In view of this accident, the qualification of the construction unit can basically be ruled out, and it belongs to Beijing Railway Bureau. As a state-owned construction enterprise, safety is the top priority. The cause of bridge collapse needs careful study and investigation by bridge experts.