Abstract: Abstract: In order to explore the control of ventilation system under the fire mode of super-long highway tunnel, a method of dividing disaster prevention intervals based on the dual control of smoke and evacuation was proposed for TianshanShengli Tunnel. By using the analysis method of ventilation network, considering the high altitude environment and the slope of tunnel polyline, the ventilation system control calculation of multi-intersection airflow in different positions of each disaster prevention interval was carried out, and finally the number and position of disaster prevention fans in the service tunnel, cross passage and main tunnel on the left and right lines were obtained.The results show that the TianshanShengli Tunnel has divided the left and right lines into 31 and 30 disaster prevention zones considering smoke control, evacuation, and electrical and mechanical control factors, and determined the specific sections and number of wind turbines. The left and right main tunnels have 112 and 114 SDS112T-4P-37 wind turbines respectively, and 168 SDS63T-2P-15 wind turbines were installed in the service tunnel.

Key words: Key words: ultra-long highway tunnel, high-altitude, disaster prevention zone, fan configuration, network ventilation