水雾段用于城市隧道阻烟分隔的全尺寸试验

Full scale tests on water mist segment to prevent smoke spreading in urban tunnel

以某城市公路隧道为背景,将类似水雾幕的水雾段系统应用于两条隧道联通匝道处,确定水雾段系统的设计参数,通过不同火灾工况模拟分析水雾段系统的控制方式及阻烟效果。设计地下交通环廊的8 MW火灾和主隧道的30 MW火灾,分有无水雾段、机械排烟是否有效研究火灾烟气的蔓延情况。结果表明,水雾段系统作为两条隧道分隔的加强措施,可延缓烟气的蔓延;在机械排烟的协同下,能够较好控制烟气,保障另一条隧道的人员安全疏散。

Taking an urban tunnel as sample, fire simulation wilh the water mist segment at the connection ramp of two tunnels was carried out to obtain the parameters, control mode and smoke sup- pression effect of water mist segment. The smoke movement was researched with 8 MW fire in the underground traffic corridor or 30 MW fire in main tunnel under the conditions of with or without wa- ter mist segment and mechanical smoke exhaust. Resulls showed that the water mist segment system as a strengthening measure of separation between two tunnels can delay the spread of smoke. With the cooperation of mechanical smoke, the smoke can be con trolled well for the personnel evacuation in the other tunnel,