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《Building Science》 2012-11
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Analyses on Fire Scenarios Character and Smoke Control Technology in Urban Traffic Tunnels

LI Yan-feng,LI Jun-mei,LIU Shan-shan(College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China)  
With the development of city,the quantity and scale of urban traffic tunnel are increasing because urban traffic tunnel can cut down the city ground traffic and reduce the land use for road.Fire is the most important disaster of urban traffic tunnel.The specialties in tunnel structure,traffic flow density and fire character of urban traffic tunnel are analyzed by comparing with those for non-city road tunnel.The difficulties and key technology for fire safety engineering are discussed and future research directions for fire safety are pointed out.The following conclusions can be drown that longitudinal ventilation mode is mainly adopted in current urban traffic tunnels in China.The influences of urban traffic tunnel slope,the positions of tunnel portal,entrance-exit and shaft on critical velocity for smoke control are more important than that for non-city traffic tunnel.Combing numerical simulation method with a local full-scale test is a reasonable and reliable technology for studying smoke propagation in urban traffic tunnel.The fundamental researches on complex time-space behavior of tunnel fire plume and development of hybrid field-network simulation method would be benefit for designing ventilation,smoke control system and enhancing the fire safety level of urban traffic tunnel.
【Fund】: 国家自然科学基金面上项目(50878012);; 城市与工程安全减灾教育部重点实验室重点项目(004000546612016);; 北京市科学技术研究院创新团队计划项目(IG201206N)
【CateGory Index】: U458.1
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