Study On Smoke Control And Personnel Evacuation In Huainan Longhu Underground Commercial Street

Underground commercial street as a form of underground structures are widely used in space nervous city now, and generally large in scale.At the same time, Compared with to General store,the underground commercial street in addition there are a lot fuel, the big fire load, but also the fire consequences of any building is more serious than the ground, because of the characteristics of its sealing ability, safety export less. Therefore, in this paper, the underground commercial street smoke control and evacuation are studied. Taking Huainan Longhu road underground commercial street as an example studied smoke control and evacuation with the method of simulation analysis.In this paper, first of all, on the basis of theoretical analysis of fire development process combined with the actual situation of the underground commercial street, determine the fire growth model, fire-load density, the maximum heat release rate. Then according to the basic theory of fire smoke spread and control, combining with the characteristics of the underground commercial street, analyzed the spreading rule of flue gas in underground commercial street and the flue gas control measures. In pointing out fire flue gas with high temperature, toxic, reducing of optical etc. several parameters to determine the dangerous state of fire smoke were studied.Through the actual survey statistics with the peak of personnel underground commercial street, according to the experience formula of the evacuation calculate the evacuation time of each fire protection district.choose the biggest risk of fire protection district, four scenarios were set up on the fire simulation, Through comparing the smoke to dangerous state time and people safety evacuation time, come to the conclusion that fire exit is close, the biggest threat to people. But as long as open exhaust device in a timely manner, whether the fire in what position, can ensure the safety of evacuation. Therefore, it is concluded that the underground mall conform to the requirements of performance-based fire protection design.In this paper, the research process and result of the underground commercial street provides basis and guidance to the performance-based fire protection design, can also provide reference for other underground buildings fire protection design.