城市地下交通联系隧道烟气控制探讨

发布时间：2018-04-16 06:17

本文选题：安全工程 + 隧道火灾　；参考：《安全与环境学报》2017年02期

【摘要】：为了给城市地下交通联系隧道(UTLT)防排烟系统设计和人员应急救援提供参考依据,以重庆某UTLT二期工程一段主隧道为例,开展全尺寸火灾试验,探讨了横向排烟方案的烟控效果,并验证了Alpert顶棚最高温升衰减模型。结果表明,UTLT主隧道段采用横向排烟方案,当防烟分区长度为120 m时,采用的排烟量设计方法是合理的。当隧道为上坡时,最有利的烟气控制模式为同时开启着火分区及下游相邻分区的排烟系统和与排烟分区紧邻的上、下游两个分区的补风系统。隧道顶部烟气最高温升衰减规律为:下游距火源无量纲距离r/H0.57及上游部分,呈指数衰减;下游距火源无量纲距离r/H0.57部分,呈幂函数衰减,且衰减程度与排烟方案有关。
[Abstract]:In order to provide reference basis for the design of smoke prevention and exhaust system and emergency rescue of personnel in urban underground traffic connection tunnel, the full-scale fire test was carried out in the first section of main tunnel of a second phase UTLT project in Chongqing, and the smoke control effect of transverse smoke exhaust scheme was discussed.The maximum temperature rise attenuation model of Alpert roof is verified.The results show that the transverse smoke exhaust scheme is adopted in the main tunnel section of UTLT. When the length of smoke control zone is 120 m, the design method of smoke discharge is reasonable.When the tunnel is up slope, the most favorable flue gas control mode is to open the smoke exhaust system of the fire zone and the adjacent downstream zone at the same time, and the upstream and downstream air supply system adjacent to the smoke exhaust zone.The attenuation law of the maximum temperature rise of flue gas at the top of the tunnel is as follows: the dimensionless distance from the downstream to the fire source r/H0.57 and the upstream part are exponentially decaying, while the r/H0.57 part of the downstream distance from the fire source is the power function attenuation, and the attenuation degree is related to the smoke exhaust scheme.
【作者单位】：重庆大学城市建设与环境工程学院;重庆市公安消防总队;公安部四川消防研究所;
【基金】：重庆市社会民生科技创新专项项目(cstc2016sh mszx30016) 重庆市建设科技计划项目(2015-1-34) 中央高校基本科研业务费项目(106112015CD JXY210008) 重庆市研究生科研创新项目(CYB16006)
【分类号】：U453.8

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