Discussion on smoke prevention design of underground evacuation staircases

 In case of fire, the underground evacuation staircase can prevent smoke and hot air from entering the staircase, which is an important channel for evacuation in the basement. Discusses the smoke control design of the underground evacuation staircase. Thinks that the smoke control mode of natural ventilation can be adopted in the underground evacuation staircase when there are good ventilation conditions. Puts forward some measures to improve the ventilation conditions.