Five-stage closure method for flood control of Nanjing subway Starting conditions for closing entrances and exits

The starting condition of the five-level shutdown mode for flood control in Nanjing Metro is that the meteorological department has issued red and orange rainstorm warning signals and predicted that the rainfall will exceed 100 mm in the next six hours. The purpose of this regulation is to ensure the safety of passengers. Rainstorm weather can easily lead to water accumulation in subway platforms, tunnels and even waterlogging in subway stations. Closing the entrance and exit can reduce the flow of people in the subway, reduce the risk of waterlogging on the platform and station, and ensure the safety of passengers. At the same time, it is also to protect the safety and integrity of subway equipment and avoid the damage of equipment due to water ingress. It is inconvenient for people to travel when the subway entrances and exits are closed in rainstorm weather, but it is of great significance in ensuring the safety of personnel and equipment.