A Smoke Control Study Of Subway Station Based On A Variety Of Vtilation Modes

In the 21 st century, the world economy is trying hard to get out of the predicament of the external environment, while China’s economy has rallied so strong. As the carrier of economic activities, the city is expanding its vitality and influence continuously in the form of urbanization. What the process of urbanization is the product of national industrialization and modernization. The emergence of urban community has a greater demand for rail transit, As a pressure relief means of urban transportation, urban rail transit has developed rapidly in China recently. But in the course of operation, the prevention and emergency treatment of the subway fire are becoming more and more important. Metro building structure is complex and diverse, the Railway Station has a large flow of people,once the fire accident, the result is inconceivable. At present, China’s subway construction will be in the rapid development stage, that studying of metro conflagration and exploring the various ventilation mechanism of the fire prevention and the rapid evacuation of personnel has a significant guiding significance for the protection of life and safety and improving the level of China’s subway construction.Based on the related researches at home and abroad, this thesis takes a typical station of Zhengzhou Subway as the research background, and analyzes fire simulation. In order to explore a variety of ventilation modes in case of subway platform fire, a physical model for the double layer island in a subway station is built and PHOENICS simulation software is used to simulate a subway fire. That Researching ventilation modes combination scheme of tunnel ventilation fan(TVF), track exhaust fan(TEF), smoke exhaust fan(SEF) have an effects on the flowing gas field and temperature field. And the platform layer temperature,air velocity and CO concentration were analyzed in case of subway platform fire. The best ventilations mode is proposed in case of subway platform fire so as to realize a safe diagnosis. This paper will discuss the critical behavior of the personnel of the safeevacuation efficiency of the intervention, so as to establish the related mechanism for ventilation, which is of great practical significance to improve the safety of subway operation.