Study On Semi-Transverse Ventilationr Technology Of Double-Hole Railway Tunnel Rescue Station

With rapid development of tunnel construction in our country, there has being a large number of long and complicated tunnels, and tunnel fire safety is becoming a focus nowadays. This thesis focus on the smoke prevention and rescue technology of large-scale tunnel, Adopt the method of the material research, theoretical analysis, numerical computation, strive to research on semi-transverse ventilationr technology of double-hole railway tunnel rescue stationon the basis of the studies of the railway rescue station structure and ventilation mode, and set up the CFD model of double-hole railway emergency station relying on the Pingan tunnel rescue station, and confirm the important parameters of the fire numerical simulation calculation.Through by the method of theoretical analysis and numerical simulation, it confirm railway tunnel rescue station safety control standard which include fire tunnel, smoke evacuation, the cross-passages.it focuses on the calculation method of the critical velocity of preventing smoke into cross-passages, get the critical velocity prediction formula, the formula shows that critical velocity of cross-passages depend on temperature, cross-passages fire door height, has nothing to do with the cross-passages fire door width.Considering the actual situation of project, analysis of double-hole railway tunnel station layout strategy of jet fan, axial flow fan.At the same time determine the rescue station distribution of temperature, smoke, the distribution of pressure of cross-passages, velocity, analysis of rescue station control key factors and smoke control strategy. on the basis of the railway tunnel rescue station fan and exhaust system, aiming at Pingan tunnel rescue station, design the fan, provide the semi-transverse ventilationr technical reference for the design of ventilation and smoke exhaust of railway rescue station.Adopt the method of theoretical analysis, by analyzing the different location of ignition, and different smoke exhaust quantity on the impact of the emergency rescue station, acquire the semi-transverse exhaust velocity distribution regularity,exhaust system exhaust efficiency present regularity.