地铁模型试验测量与火灾模拟

THE EXPERIMENTAL MEASUREMENT AND FIRE SIMULATION OF SUBWAY MODE

本文主要在缩尺度的地铁模型中进行研究,得出楼梯口的风速分布以及隧道门开启不同的面积对楼梯口风速的影响.测出满足《地铁设计规范》要求的楼梯口处风速不小于1.5 m/s的工况条件,并在此工况下进行了现场火灾实验,证明了此工况能够有效地排除烟气,防止烟气向上层蔓延,试验所测数据都通过拉依达准则进行验证,数据可靠,为进一步的地铁火灾试验奠定基础.

This article researched air flow in staircase mouth in the reduced scale subway mode, satisfy the operating mode condition of not less than 1.5 m/s wind-speed in staircase mouth which is required by “Underground Railway Design Standard”, and carried on the scene fire experiment under this operating mode condition to prove this operating mode could remove the haze effectively and prevent the haze spreading to the upper area. The measured data have been validated by Pauta rule so that they are all reliable. It provides certain basis for the subway fire mold.