The swimming pool of a hotel in Zhengzhou collapsed. What are the signs before the building collapses?

1986 March 15, Singapore's six-story New World Hotel collapsed in less than 60 seconds, and 50 people were buried under the rubble. Only 17 people survived. On April 8, 2022, the swimming pool of a hotel in Zhengzhou collapsed, causing 3 deaths and 9 injuries. Were there no signs before these buildings collapsed? People who have done hotel fire inspection for many years tell you that there must be signs before the building collapses.

The collapse of the building must be caused by external forces, or there is something wrong with its bearing capacity. In addition to the sudden natural disasters such as earthquakes or the collapse of buildings caused by war attacks, there must be these signs before our buildings collapse in life. The first sign is that the ground around the building suddenly sinks and empty bags or cracks suddenly increase. Because our buildings are built on the ground, there are foundations underground, and there are some underground facilities, some of which are tunnels, subways, drainage pipes and so on. If the ground around or inside the building is found to be sinking, it means that the situation below the ground has changed greatly, which has affected the stress of the building on the ground. This situation is very likely to lead to the collapse of ground buildings.

The second sign is that there are serious cracks in load-bearing columns, beams, plates or walls, and the cracks have been developing continuously. 1985 before the collapse of Singapore New World Hotel, the proprietress found that the pillars of the hotel had cracked, but she didn't take it to heart, which led to the collapse of the hotel. We will pay special attention to the external wall, load-bearing wall and main pillars of the building during the safety and building inspection. Once cracks appear in these key stress parts, it is likely that they have affected the stress of the building. During an inspection, it was found that this happened on the top floor of a hotel. Later, it was confirmed that the perennial vibration of the roof central air conditioning unit affected the stress.

The deformation of the third load-bearing column, beam, plate or wall is too large, and the wooden components or connection parts are seriously decayed or have been eaten by white mosquitoes. Deformation means that the stress is too large or changed, so we must be vigilant when we find the deformation and decay of buildings.

How to find these signs is that the monthly safety inspection of managers must be done, and it must be done in a down-to-earth manner.