On July 20, Henan province suffered extreme heavy rainfall. In the evening, the train of Zhengzhou Metro Line 5 stopped running in the tunnel before the Beach Street station and the Shakou Road station, and the rainwater poured into the tunnel and the train.
According to official data,More than 500 people were evacuated in this incident, 12 of them died after rescue and 5 were injured and sent to hospital.
After the event, many people did not quite understand why passengers were trapped between the two subway stations?
A staff member of Zhengzhou Metro explained to the media that the tunnel section where the accident happened crossed Zhengzhou north station, the largest marshalling station in Asia. The terrain was lower than the surrounding area. Coupled with extreme heavy rainfall, the subway flood prevention and emergency preparedness were partially ineffective, and the train had to stop before it arrived.
According to the general subway design, the tunnel between the two platforms tends to be high at both ends and low in the middle (electricity can be saved when going downhill from the station and going uphill from the station), which aggravates the degree of disaster and the difficulty of rescue in flood.
Generally speaking, if the tunnel water does not exceed the track, it can normally drive to the station, but once it does not cross the track, it is necessary to consider parking, because the vehicle control system and signal receiving equipment are mostly on the chassis.
Subway stations are designed with drainage systems, which are directly connected to the municipal drainage network. Generally speaking, the flow is enough, but I really didn't expect it to be so serious.It is the first time that some professionals have been involved in the construction and maintenance of many subway lines across the country.
After the incident, the trapped passengers, subway workers and rescue workers spent two hours in a soul stirring rescue and self rescue.
Zhengzhou Metro Line 5, opened on May 20, 2019, is the only loop line of Zhengzhou Metro. It is the longest line in Zhengzhou, with a total length of 40.7 km and 23 stations. It is also one of the busiest lines. On December 31, 2019, the maximum passenger flow reached 523200.
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