竖井对公路隧道自然排烟影响的试验研究

发布时间：2018-06-01 23:23

本文选题：公路隧道 + 自然通风　；参考：《中国安全科学学报》2014年07期

【摘要】：为研究竖井对自然通风公路隧道发生火灾时排烟效果的影响,以某顶部开口半敞开式隧道为原型,在1∶10比例平台上开展一系列模拟试验。以小型汽车火灾为模拟场景进行试验,获取隧道模型顶棚附近和0.18 m高度处的温度、竖井内CO浓度,以及烟气沉降和扩散等数据。结果表明,在上游离火源2 m处,烟气能量积聚,导致温度上升;烟气层均能被控制在人员特征高度处以上,不会对人员的安全疏散造成太大影响;随着排烟口数量的增加,烟气的沉降速率先下降后上升,竖井内CO浓度则先上升,然后达到相对稳定状态,最后呈下降趋势;当竖井数量为3时,每组试验中上下游的排烟效果均较好。
[Abstract]:In order to study the effect of shaft on smoke emission in natural ventilation highway tunnel, a series of simulation tests were carried out on the 1:10 scale platform with a semi-open tunnel at the top of the tunnel as the prototype. The temperature near the tunnel model roof and the height of 0.18 m, CO concentration in the shaft, and smoke deposition and diffusion data were obtained by taking the fire of a small vehicle as the simulation scene. The results show that at 2 m above the free fire source, the flue gas energy accumulates, which leads to the rise of temperature, and the smoke layer can be controlled above the characteristic height of the personnel, so it will not have too much effect on the safe evacuation of the personnel; with the increase of the number of exhaust gas outlets, The settling rate of flue gas first decreased and then increased, and the CO concentration in the shaft first increased, then reached a relatively stable state, and finally showed a downward trend. When the number of the shaft was 3, the effect of exhaust smoke from upstream and downstream of each group of experiments was better.
【作者单位】：中国石油大学(华东)海洋油气装备与安全技术研究中心;
【基金】：山东省自然科学基金面上项目资助(ZR2012EEM023) 中央高校基本科研业务费专项资金资助(14CX05035A)
【分类号】：U453.5

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