Fire Evacuation Study in Typical Space of Underground Commercial Street

In order to study the problem of fire evacuation in different architectural spatial forms of underground commercial streets, three sets of simulation experimental models of fire smoke and personnel evacuation were constructed. After model investigation and statistical calculation, the fire load density, heat release rate and other data were obtained, and fire and evacuation simulations are carried out through Pyrosim and Pathfinder. The impact of different typical spaces on the spread of fire smoke and evacuation of personnel was compared. The results show that since the propagation rate of fire smoke in different typical spaces is different, and the direction of fire smoke spread is basically consistent with the direction of personnel evacuation, with the spread of fire smoke in a typical space is faster, the safe evacuation time of personnel is shorter. Therefore, the safe evacuation effect of personnel from fire sources in different typical spaces is different, from high to low: corridor space, hall-type space, and intersection space. According to the simulation results, the unfavorable factors affecting the evacuation efficiency are analyzed, and a targeted underground commercial street design optimization strategy is proposed.