大型通航隧洞通风排烟特性及控制标准  

Ventilation and smoke exhaust characteristics and control standards of large-scale navigation tunnels

作　　者：陈鹏云 查显顺 谢方祥 CHEN Pengyun;ZHA Xianshun;XIE Fangxiang(Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan Hubei 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《工业安全与环保》2023年第10期5-8,共4页Industrial Safety and Environmental Protection

摘　　要：参照国内外相关标准,分析并提出大型水运通航隧洞通风控制和排烟控制标准,对三峡新通道通航隧洞需风量进行了计算分析,并建立隧洞通风和火灾三维数值计算模型,对通航隧洞的污染物排放特性和排烟特性进行三维数值模拟。结果表明,三峡新通道水运通航隧洞的需风量由稀释NO_(2)需风量确定;射流风机通风方式下,隧洞内基本上能满足CO体积浓度和NO_(2)质量浓度的通风控制标准;火灾情况下,疏散路径上人员高度处CO体积浓度和温度均满足安全控制标准,能见度是影响人员逃生的主要控制因素。With reference to relevant domestic and foreign standards,the ventilation control and smoke exhaust control standards for large-scale navigation tunnels are proposed after analyzing,and the requested air volume of the Three Gorges new navigation tunnel is calculated and analyzed.A three-dimensional numerical calculation model of navigation tunnel ventilation and fire is established,and the study of the pollutant emission characteristics and smoke exhaust characteristics is carried out by using the numerical simulation calculation method.The results show that the requested air volume of the Three Gorges new navigation tunnel is determined by the requested air volume of diluted NO_(2);under the ventilation mode of jet fan,the tunnel can basically meet the ventilation control standards of CO concentration and NO_(2)concentration;in case of fire,the CO concentration and temperature at the height of people on the evacuation path meet safety control standards,and visibility is a key control factor affecting personnel evacuation.

关 键 词：通航隧洞 需风量 控制标准 通风排烟特性 

分 类 号：U458[建筑科学—桥梁与隧道工程] U698[交通运输工程—道路与铁道工程]