What are the possible reasons for the rollover of the bridge deck of Ezhou Expressway in Hubei Province?

I believe everyone has seen a news that a high-speed bridge in Ezhou, Hubei Province rolled over, and the specific reasons are still under investigation. There may be the following reasons: the total weight of cars on the bridge has exceeded the load borne by the bridge, and there are problems in the structural design of the bridge.

This incident has caused 3 deaths and 4 injuries so far. At that time, there were three trucks running on the bridge, one of which was seriously overweight 190 tons, and all three trucks were on one side of the bridge. Maybe that's why the bridge was knocked down heavily. It happened in Daguang Expressway in Hubei Province. After the bridge rolled over, the car under the wall was overwhelmed, and the accident was still very serious. At present, the relevant departments are also investigating the specific reasons, hoping to find out in time to avoid similar accidents in the future.

The structure of this bridge is a single-column pier box girder bridge, which probably refers to a bridge with only one single-column pier as support. In the small history of our country, the design of bridges was based on the traffic efficiency and terrain structure at that time, and each bridge had a heavy amplitude. If it exceeds this weight, some dangerous accidents may occur. At present, there are two theories that caused the accident. The first one is overweight because of nonsense. The second reason is that the structure of the bridge is single column, which may have caused some instability, and finally this situation appeared. However, we have to wait for some investigations by relevant departments to give an absolute answer.

This incident tells us that in the control of highway bridges, we hope that the relevant departments can strengthen control and prevent illegal vehicles from actually driving, which will bring us serious harm. This incident is a serious warning, and I hope that similar accidents will never happen again. I also hope that the relevant investigation departments can find out the specific reasons and rectify them to avoid similar things from happening again.