Discussion on issues related to use of track-top air ducts for heat and smoke exhaust in subway stations

Starting from the basic functions of the track-top air duct of subways, this article explores whether the track-top air duct can be eliminated and the impact of canceling the track-top air duct on smoke and heat exhaust through literature research and test research. The study concludes that the platform track area is the first choice for evacuation and rescue in case of train fire. When it comes to personnel evacuation and disaster prevention safety, the horizontal smoke exhaust method should be adopted. The temperature of the station track area is affected by the superposition of many factors. The station heat exhaust system should be retained to cope with the pressure of increased temperature in the track area during long-term train operation. As a permanent project, the civil track-top air duct makes full use of the abundant space in the upper part of the track area and can meet the needs of smoke and heat exhaust at the same time. It has advantages unmatched by other methods and should be the preferred solution for smoke and heat exhaust in stations.