Beijing West Railway Station Subway Station Evacuation And Flue Gas Simulation Study

MTR as important in today's society of public transport, carrying the responsibilities and the delivery of important social value. With the recent expansion of its scope, evolving into a subway station underground space multi-storey hub, accounting for more space, carrying more than that, the space environment is more complex. With the continuous development of the MTR station, multi-layer subway transfer station is also facing more risk:hubs closed, escape more difficult, weak safety factor.Beijing West Railway Station as the main object of my study, collation of relevant information with the previous analysis and field research, the Beijing West Railway Station subway station construction in-depth study. Beijing West Railway Station crowd flow on the characteristics of statistical analysis. And calculate the future of Beijing West Railway Station subway station personnel flow peak value.STEPS simulation using established evacuation model, simulated in the peak of the Beijing West Railway Station emergency evacuation of the process, come to different conditions necessary for transfer station evacuation time RSET (Required Egress Time), by simulation Simulation process of research, to find out the evacuation process in the weak links. After analyzing the causes of the corresponding number of proposed solutions.FDS simulation using simulation software platform in the middle of the transfer station or fire station hall in the middle to simulate a gas diffusion process, full account of the fire's combustion process and flue gas radiation, can simulate the gas composition of a variety of harmful substances And concentration, so that it can fully understand the danger of fire. Critical analysis of the arrival of the four risk judgments, including two security a high risk of coming time, temperature, smoke visibility and the concentration of CO danger comes time to determine the shortest time of four hours, come to the arrival of fire danger time for the effective evacuation ASET (Available Safe Egress Time), and analyze the impact of smoke on the evacuation.