Study On Mode Of Smoke Flow Control And Personnel Evacuation In Urban Highway Tunnel With Multiple Entrances And Exits

In order to alleviate the urban traffic pressure and improve the urban traffic function,the urban highway tunnel has been widely used in urban traffic construction.Urban highway tunnels have the characteristics of urban traffic included the multiple entrances and exits,traffic congestion when people on and off duty,huge traffic flow,etc.,so compared with non-the urban highway tunnel,fire probability,fire scale,fire development,smoke flow control and personnel evacuation mode in urban highway tunnel are quite different,therefore,it is necessary for fire research in the urban highway tunnel with multiple entrances ’and exits.Based on the theoretical analysis,numerical simulation and stochastic simulation,the dissertation analyzes the smoke flow control and personnel evacuation mode of the urban highway tunnels with multiple entrances and exits,and applies the research results to project,The research work of this paper is mainly reflected in the following aspects:1.Based on the data investigation of the urban highway tunnel fire accident,the ignition source characteristics of the urban tunnel are analyzed,and the ignition law of the various types of vehicles in the urban highway tunnel is proved by the method of theoretical calculation and numerical simulation.2.Using the stochastic simulation method,considering the fire risk and the frequency of fire,the initial ignition scene of urban highway tunnel is determined.And then through the fire numerical simulation,the law of fire development in the urban highway tunnel with multiple entrances and exits is analyzed,the tunnel fire scale development curve is obtained.3.Based on the structural characteristics of urban highway tunnel with ramp,with shaft and horizontal channel,the influence of different structure on the diffusion of smoke and the mechanism of evacuation were analyzed,and the smoke flow control and personnel evacuation mode and corresponding control standard were obtained.4.This puts forward the divide principle of smoke evacuation zone in the urban highway tunnel with multiple entrances and exits,and obtains the fan configuration scheme and the fan control scheme based on the ventilation network theory.5.FDS fire numerical simulation and personnel evacuation simulation method were used to evaluate the evacuation safety of personnel under the fire scene.The research results of this dissertation have reference significance to the design of disaster prevention and rescue of urban highway tunnels with multiple entrances and exits.