Emergency safety evacuation signage system for subway inter-district tunnels(2)

The main focus is on the design of evacuation instructions in underground tunnels, and some personal ideas and suggestions.

Subway interval tunnel ventilation system design program in order to enable the normal operation of the train to remove the residual heat and humidity in the tunnel, the train blocked in the interval tunnel can provide a certain amount of ventilation to the blocked area, to ensure the normal operation of train air conditioners and other equipment, to provide sufficient fresh air for passengers, the train fire system should be able to remove smoke, control the flow of smoke, and induce passengers to evacuate to a safe area, the subway interval. 

The tunnel ventilation system is generally installed in the tunnels and the relevant tunnel ventilation equipment is generally installed in the fan rooms at both ends of the stations to realize the piston ventilation, mechanical ventilation and mechanical smoke evacuation functions in the tunnels between the upstream and downstream lines.

The operation mode of the system mainly includes the following: 1.1 Normal operation (1) According to the need, the longitudinal mechanical ventilation of the inter-district tunnel ventilation system is carried out for half an hour before the morning operation, and after the ventilation is completed, it is transferred to the normal operation mode.

(2) When the train is in normal operation, the station tunnel ventilation system is put into operation while the inter-district tunnel ventilation system is not in operation, and the piston effect of the train is used to remove the residual heat and humidity from the inter-district tunnel by ventilating through the piston air shaft at the station end.

(3) According to the need, the ventilation system of the inter-district tunnel will be operated for half an hour of longitudinal mechanical ventilation after the closing of the train at night, and all air ducts will be opened after the ventilation is completed.

Blocking operation when the train is blocked in the inter-district tunnel for some reason, the inter-district tunnel ventilation system is opened, longitudinal mechanical ventilation to the blocked tunnel, to ensure that the blocked section of the vehicle air conditioner continuous operation, to provide fresh air to the blocked section.

Fire operation When a train is on fire and stopped in the interval tunnel, the pre-designed fire operation mode should be implemented according to the location of the train in the interval and the location of the train fire.

Generally speaking, at present, only the front fire and rear fire are considered for train fires in the interval tunnel, i.e., for a 6-car train, a fire in any of the first 3 cars is considered as a front fire, and a fire in any of the last 3 cars is considered as a rear fire, and the corresponding tunnel ventilation and smoke evacuation mode is activated according to the specific fire situation by the control center's environmental control personnel [3], At the same time, the majority of passengers are guided to evacuate in the direction of the new wind.