城市快速通道入口匝道火灾反向通风烟气控制研究  

Fire smoke control of reverse ventilation for fire in urban expressway entrance ramp

作　　者：徐燃 赵家明 王强华 吴金永 徐志胜[2] XU Ran;ZHAO Jia-ming;WANG Qiang-hua;WU Jin-yong;XU Zhi-sheng(China Railway Tunnel Group Co.,Ltd.,Guangdong Shan⁃tou 515073,China;Civil Engineering School,Central South University,Hunan Changsha 410075,China)

机构地区：[1]中铁隧道局集团有限公司,广东汕头515073 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《消防科学与技术》2020年第4期478-482,共5页Fire Science and Technology

摘　　要：利用数值模拟研究城市快速通道入口匝道火灾反向通风烟气控制模式下人员疏散的安全性。选取匝道长度为500 m,坡度为6%,火灾规模为22.5 MW的典型火灾场景,以2 m高处的温度及能见度作为判据,采用FDS和Pathfinder分析不同匝道火源位置情况下的人员疏散安全性。结果表明:当火源位置距离匝道入口处较近时,直接采用反向通风模式能够保证人员安全疏散。火源与匝道入口的距离会影响人员疏散的安全裕度,若火源位置距离匝道入口处较远,采用反向通风模式将影响匝道内人员的安全疏散。The evacuation safety under reverse ventilation mode of fire in urban tunnel entrance ramp was studied by numerical simulation method. Select a typical fire scenario with a ramp length of 500 m, a slope of 6% and a fire scale of 22.5 MW, the temperature and visibility at 2 m height were used as the criteria, the evacuation safety under fire at different location was analyzed by FDS and Pathfinder. The results showed that reverse ventilation can be adopted directly when the distance between the fire source and the ramp entrance was small. The distance between the fire source and the ramp entrance would affect the margin for safety evacuation.When the fire source was far away from the ramp entrance, reverse ventilation mode would affect the process of safety evacuation.

关 键 词：隧道通风 入口匝道 反向通风 烟控方案 疏散 

分 类 号：X913.4[环境科学与工程—安全科学] TU834.2[建筑科学—供热、供燃气、通风及空调工程]