Fire fighting in the highway tunnel has been the main threat to the tunnel operation safety. In the present study, a small-scale tunnel model has been established based on Caihongling Tunnel in Jiangmen at China and 24 sets of small-scaled fire model tests have been carried out with tunnel slope gradient, ventilation velocity and fire power as main factors. The slope takes gradient of 0.0%, 1.5% and 3.0%, respectively, and the ventilation velocity is successively set at 0 m/s, 0.3 m/s, 0.6 m/s and 0.9 m/s. Furthermore, the fire power, based on pool fire, is classified as type A and B. As a result of the error of measurement and the influence of environmental factors, the fire source power for type A is set to 17.2 kW and 22 kW for type B. In view of the tests, the present study investigates the smoke flow and longitudinal distribution of temperature along the highway tunnel, with an aim to analyze the range and direction of smoke flow under different operating conditions and further reveal the law of longitudinal distribution of temperature at different levels. According to the test results, it is hoped that the present study can provide some basis and insight for the tunnel structure, fire protection of equipment and the setting of ventilation velocity and evacuation in the case of fire.

中文翻译：

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公路隧道火灾烟气温度分布的倾角影响

公路隧道的消防工作一直是隧道运营安全的主要威胁。本研究以江门彩虹岭隧道为基础，建立了小型隧道模型，以隧道坡度、通风速度和火力为主要因素进行了24组小型火灾模型试验。坡度分别取0.0%、1.5%和3.0%的坡度，通风速度依次设置为0 m/s、0.3 m/s、0.6 m/s和0.9 m/s。此外，火源功率根据池火分为A型和B型。由于测量误差和环境因素的影响，A型火源功率定为17.2千瓦，22千瓦。 B型。 鉴于测试，本研究对公路隧道沿线的烟流及温度纵向分布进行了研究，旨在分析不同工况下烟流的范围和方向，进一步揭示不同层次温度的纵向分布规律。根据试验结果，希望本研究能为隧道结构、设备防火、火灾时通风速度的设置和疏散提供一定的依据和启示。