Study On Fire Characteristics And Smoke Control Of Rescue Station Test In Railway Tunnel

Railway is the important infrastructure for a country, without the modernization of railway it is difficult to realize the modernization of the country. In recent years, with the constant appearing of railway tunnel, though it is convenient for transportation, the safe operation of the tunnel has become a new challenge.Taking the super-long railway tunnel-Gaoligongshan Tunnel proposed in Darui railway as the background, through the rescue station’s model test under fire, this paper studies the characteristic of fire combustion in tunnel, the smoke and temperature distribution laws and the smoke control effect, and then put forward the reasonable ventilation scheme for smoke exhaust when fire breaks out in rescue station.Making a comparison between Fluent numerical simulation and model test, we can come to the following conclusions:(1)Through the research of smoke and temperature distribution laws in the rescue station with longitudinal ventilation, we can get the critical velocity. The theoretical critical velocity has been calculated through theoretical derivation, and then making a comparison between experimental value and theoretical theoretical, we can get that it is reasonable to theoretically predict critical velocity.(2)Using semi-transverse ventilation, the smoke exhaust effect with longitudinal induced wind is better than witch without longitudinal induced wind, and the greater amount of smoke exhausts, the better smoke exhaust effect is.(3) Making a comparison between longitudinal ventilation and semi-transverse ventilation, we can get that semi-transverse ventilation is better for the super-long railway tunnel rescue under fire.(4)Compared Fluent numerical simulation with model test, we can demonstrate that it is consistent using both methods to study the temperature and smoke distribution laws.