Study on Fire Ventilation Control of Subway Tunnel: A Case Study for Dalian Subway

During the actual operation of a subway company, only one ventilation-control scheme is considered in emergency plan, without considering specific location difference fire source. However, case an tunnel fire, best and personnel-evacuation are very different given potential locations We consider use connecting channel for smoke exhaust or personnel evacuation study scheme, when source at positions relative to train, train channel. Taking between Yaojia Station Nanguanling Metro Line 1 Dalian, China, as example, 1:1 full-scale numerical model established dangerous fire-related conditions, such carbon monoxide concentration, visibility, temperature. Nine typical working conditions tunnel-section studied. The traditional commonly used longitudinal-ventilation mode can ensure control evacuation. For end designed this paper safety personnel. middle most dangerous, about 50% affected by during escape. This analyzes impact mode, transverse-ventilation semi-transverse-ventilation on under conditions. It found that with least affected. Furthermore, semi-transverse ventilation requires higher engineering investment, which more than RMB 2000 per meter tunnel. If economic available, it recommended instead mode. research results provide guidance emergency-control subway-tunnel operation.