What is the cause of the 12 death accident notified by Zhengzhou Metro?

According to the news of Zhengzhou Metro, on July 20th, a rare rainstorm occurred in Zhengzhou, which caused serious water accumulation in the wulongkou parking lot of Zhengzhou Metro Line 5 and its surroundings. 18 or so, the accumulated water rushed out of the water retaining wall of the incoming line and entered the main line, causing a train of Zhengzhou Metro Line 5 to stop at Shakou Road Station to Tanmiao Station, and more than 500 passengers were trapped.

With the joint efforts of subway employees, emergency rescue teams, police officers, PLA officers and soldiers, volunteer rescue teams and enthusiastic passengers, * * * rescued more than 500 passengers, 12 passengers died after being rescued, and 5 passengers were sent to hospital for observation, with stable vital signs. At present, the Metro Group is carrying out emergency rescue and operational recovery.

There is no clear subway flood control standard in China.

As far as the actual operation of Zhengzhou Metro is concerned, several stations were temporarily closed due to rainfall on the afternoon of July 20th alone. Among them, Fengqing Road Station of Metro Line 4 stopped at 5 pm, and Fengzhuang Station of Metro Line 5 was also closed almost at the same time. However, most of the 32 stations on Line 5 are still in operation.

In fact, the main line of the subway is not only Zhengzhou in China, but also the subway track is flooded, so the train must stop.

The "Emergency Plan for Flooding in Rail Transit Area" obtained by the reporter stipulates that when the accumulated water in the rail transit area causes signal obstacles and the height between the accumulated water surface and the rail surface is 125px≤h≤450px, the train is allowed to pass through the accumulated water section at this time;

When the height h between the accumulated water surface and the rail surface is less than or equal to h≤ 125px, in principle, trains are not allowed to pass, and the speed limit must be15 km/h. However, when the automatic control system for disaster prevention (BAS) gives a high water level alarm or the train driver finds water in the rail area, but the height H between the water surface and the rail surface is greater than or equal to h≥450px, the train is allowed to pass through the water-logged section at normal speed, which will not affect the normal operation of the train.

However, a real problem is that there is no clear standard for subway flood control in many laws and regulations or national standards that have been promulgated. The reporter inquired about the Code for Metro Design issued on 20 13, the flood control standards implemented on 20 15, the People's Republic of China (PRC) * * * Law and the National Water Law revised on 20 16, among which the Code for Metro Design only clearly stipulated the flood control elevation standards for rolling stock depots, comprehensive bases and interval bridges.

"But according to the rainfall analysis of Zhengzhou in this extreme rainstorm, the short-term rainfall has far exceeded the standard of once in 50 years," an interviewed person in charge of the subway operator told 2 1 Century Business Herald. However, the flood control standard, People's Republic of China (PRC) and the national water law have not mentioned the subway flood control standard.

The above-mentioned subway operators said that even if the relevant laws, regulations or standards are revised in the future, it will not fully conform to reality. "The underground conditions, river conditions and precipitation conditions of each city are inconsistent, and a set of standards cannot be applied to the actual situation of each city."

The person said, "Take Zhengzhou Metro Line 5 as an example, with a total length of more than 40 kilometers and 32 stations. The environment of each station is inconsistent. The first station has high terrain and good drainage, and the Miaojie Station and Shakou Road Station on the beach are in relatively low-lying places. Therefore, in the design process, the actual situation of each station should be considered. It is precisely because it may happen during the preliminary design and construction of the subway.

Refer to the above? Light. Com- Zhengzhou subway bulletin 12 cause of death accident.