| At present,there are 33 cities in mainland China that have completed and put into operation nearly 4600 KM subway lines,which has quadrupled in the past 10 years.In the last 10 years alone,21 cities have opened subways,Subway construction enters boom phase,With the rapid development of urban rail transit,There are also higher requirements for safe work in the subway,In various accidents at subway stations,Fires occur most frequently,Once a fire occurs,based on the characteristics of the subway station’s own structure,The space is relatively closed and narrow,and there are not many vents connected to the outside world.Among them,the transfer station is a key node in the urban subway line network.Has a larger passenger capacity,It is more dangerous in the event of an emergency at the interchange station,Toxic fumes are more difficult to emit,In high temperature environments,The panic of the personnel has increased,Difficulty in rescuing people during a subway fire,Therefore,it is necessary to study the evacuation of people in subway accidents.After collecting relevant literature,we found that research on fire and evacuation,Computer simulation technology is often used.However,although traditional fire and evacuation simulation software has been developed.However,the software modeling operation is complicated,it takes a long time to model a large transfer station,and the model components are cumbersome.It is easy to cause inaccurate simulation results due to inaccurate modeling,It is difficult to meet the needs of subsequent simulations.Therefore,a method research combining BIM technology with traditional computer simulation software is proposed,which not only meets the requirements for rapid and accurate modeling of transfer stations,but also integrates comprehensive model information involved in subsequent fire and evacuation.On the basis of providing accurate and comprehensive environment models,it also supports three-dimensional visual display of the entire simulation process,which is convenient for people to understand the simulation results.Based on the above research background,this article continues to explore and trythrough field research,data collection,and other research methods.It studies the evacuation of people who experience sudden fires in subway interchange stations,and uses BIM technology.(1)By referring to the actual completion drawing of the subway station construction and on-site investigation,the application of Revit software first establishes a 3D subway station model consistent with the real environment,Based on the BIM subway station model,through the setting and screening of information,considering the station facility information,emergency response information and corresponding subway specifications required in the event of a fire,A real fire model was established in the Pyrosim software.The daily behavior characteristics of passengers and staff in a real subway station and the characteristics of personnel in an emergency were investigated,and the path evacuation model was established using Pathfinder software.(2)Research on the operation methods of Pyrosim fire simulation software and Pathfinder evacuation simulation software can improve the authenticity of the simulation and reduce the computational burden of the computer.(3)The animation effect of the simulation result is optimized to achieve a fire evacuation effect closer to the real scene.(4)Set up evacuation guides to optimize fire evacuation scenarios,and explain the importance of station safety organization capabilities to evacuation results in a more intuitive way. |
