Abstract: Through numerical simulation and experimental tests, different cooperative smoke exhaust schemes are studied when a fire occurs on the platform of a subway station in Wuhan. The results show that the scheme of the rail top heat exhaust system cooperating with platform fire smoke exhaust is feasible, and the air flow of no less than 1.5 m/s downward can be formed at the escalators of each building to prevent the smoke from spreading upward; when the smoke outlet on the top side of the rail is uniformly arranged, the platform fire linkage equipment is the least, and the cooperative smoke exhaust effect is the best. There is a risk that the wind speed at the escalator entrance of the building is less than 1.5 m/s, when adopt the scheme of special smoke exhaust duct at the end of the platform cooperates with platform fire smoke exhaust, if there are a large number of escalator entrances in the station building, so it should be carefully selected.

Key words: rail top heat exhaust system, stair entrance, platform fire, cooperative smoke exhaust effect