短隧道火灾中隧道尺寸对烟气层厚度的影响  

Influence of Tunnel Size on Smoke Layer Thickness in Short Tunnel Fire

作　　者：袁勇 YUAN Yong(Yunji Intelligent Engineering Co.,Ltd.,Shenzhen,Guangdong 571300,China)

机构地区：[1]云基智慧工程股份有限公司,广东深圳571300

出　　处：《黑龙江交通科技》2024年第12期114-118,共5页Communications Science and Technology Heilongjiang

摘　　要：为研究短隧道火灾中隧道尺寸对烟气层厚度的影响,通过模拟隧道火灾试验,分析了隧道火灾发展初始阶段烟气层厚度变化、不同隧道长度和宽度下烟气的运动特征。研究结果表明:(1)火灾发展初期,在热释放率相同条件下,纵向烟气层处于稳定状态,热释放率的增加对烟气层厚度无明显影响。(2)当隧道宽度不变时,随着隧道长度的增加,烟气层的纵向厚度逐渐增大,烟气温度逐渐减小,烟气质量流率则无明显变化。(3)当隧道长度不变时,烟气层的纵向厚度和烟气温度随着隧道宽度的增加而减小,烟气质量流率随着隧道宽度的增加而增大。(4)隧道建设中,建议适当提高通风系统的通风速度,快速降低隧道内温度,给被困人员安全疏散提供条件。In order to study the effect of tunnel size on the thickness of smoke layer in short tunnel fire,the changes of smoke layer thickness in the initial stage of tunnel fire development and the characteristics of smoke movement under different tunnel lengths and widths were analyzed through simulated tunnel fire tests.The results show that:(1)In the early stage of fire development,the longitudinal flue gas layer is in a stable state under the same heat release rate,and the increase of heat release rate has no obvious effect on the thickness of flue gas layer.(2)When the tunnel width is constant,the longitudinal thickness of the flue gas layer gradually increases with the increase of the tunnel length,the flue gas temperature gradually decreases,and the flue gas mass flow rate does not change significantly.(3)When the length of the tunnel is constant,the longitudinal thickness and temperature of the flue gas layer decrease with the increase of the tunnel width,and the mass flow rate of the flue gas increases with the increase of the tunnel width.(4)In tunnel construction,it is recommended to appropriately increase the ventilation speed of the ventilation system,quickly reduce the temperature in the tunnel,and provide conditions for the safe evacuation of trapped personnel.

关 键 词：短隧道 模拟火灾 烟气层厚度 烟气质量流率 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]