城市地下道路V形区段坡度构成对烟气扩散和重点排烟效果的影响研究  

Study on influence of slope composition at V-shaped section of urban underground road on smoke diffusion and point smoke exhaust effect

作　　者：谢飞 乔雅心 李俊梅[2,3] 董启伟 刘文博[2,3] 毕强 常默宁 齐兆 XIE Fei;QIAO Yaxin;LI Junmei;DONG Qiwei;LIU Wenbo;BI Qiang;CHANG Moning;QI Zhao(Beijing General Municipal Engineering Design&Research Institute,Beijing 100082,China;Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology,Beijing 100124,China;Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京市市政工程设计研究总院有限公司,北京100082 [2]北京工业大学绿色建筑环境与节能技术北京市重点实验室,北京100124 [3]北京工业大学城市建设学部,北京100124

出　　处：《中国安全生产科学技术》2022年第8期142-147,共6页Journal of Safety Science and Technology

基　　金：北京市自然科学基金项目(8222002);国家自然科学基金项目(51278018)。

摘　　要：为了研究城市地下道路V形区段坡度构成对烟气扩散和重点排烟效果的影响,采用数值模拟手段,对V形区段内变坡点两侧不同坡度构成、排烟口的开启方式对烟气扩散和重点排烟效率的影响进行研究。研究结果表明:对于对称V形区段,采用重点排烟控制烟气相对容易,但对降低排烟道下方顶棚最高温度作用有限;针对非对称V形区段,烟气的自由扩散特性与变坡点两侧坡度差有关,增加大坡度侧的排烟口数量可以提高排烟效率,但要将烟气有效地控制在较小的范围内相对困难。实际运行中,应结合坡度的实际构成和烟气控制总目标,制定相应的排烟口开启策略。The influence of different slope composition on both sides of slope change point and opening mode of smoke exhaust port on smoke diffusion and point smoke exhaust efficiency in tje V-shaped section of urban underground road was discussed by means of numerical simulation.The results showed that in the symmetrical V-shaped section,using the point smoke exhaust to control the smoke was relatively easy,but the effect on reducing the maximum ceiling temperature under the smoke exhaust duct was limited.In the asymmetric V-shaped section,the free diffusion characteristics of smoke were related to the slope difference on both sides of slope change point,and increasing the number of smoke exhaust vents on the side with large slope could improve the smoke exhaust efficiency,but it was relatively difficult to effectively control the smoke in a smaller range.In actual operation,the corresponding opening strategy of smoke exhaust vents should be formulated according to the actual composition of slope and the overall goal of smoke control.

关 键 词：城市地下道路 V形隧道 重点排烟 坡度 

分 类 号：TU921[建筑科学—建筑设计及理论] X932[环境科学与工程—安全科学]