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Using the secondary exploited pre-manage software of FDS build up the arc physical model of the extra-long highway tunnel. Confirm the size of the fire according to the condition in the tunnel. Choosing FDS simulate the ventilation in Zhongnanshan extra-long highway tunnel, and get the characteristics of smoke affluent. By considering the smoke affluent surface arrive different cross sections at different time, obtain the level spread speed of the smoke affluent in the tunnel. Then considering the tunnel security analysis partition the tunnel to up-fire zone and down-fire zone, and build up the safety standard of vehicle and personnel life. Combining the results of the simulation, obtain the conclusion that the vehicle and personnel life is safe in the tunnel under the condition of fire

Instant Numerical Simulation Research on Fire Ventilation in Extra-Long Highway Tunnel in Zhongnanshan Section of Qinlin Mountains