主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (9): 1240-1246.

• • 上一篇    下一篇

双层隧道上层车道顶部单侧与双侧机械排烟的效果研究

王恩师1, 王湛2, 唐智2,3   

  1. （1. 中交第二公路勘察设计研究院有限公司，湖北 武汉 430056；2. 武汉大学 土木建筑工程学院，湖北 武汉 430072；3. 湖北省城市综合防灾与消防救援工程技术研究中心，湖北 武汉 430072）
  • 出版日期:2024-09-15 发布日期:2024-09-15
  • 作者简介:王恩师（1982— ），男，中交第二公路勘察设计研究院有限公司高级工程师，学士，主要从事公路机电交安设计及科研方面的工作，湖北省武汉市汉阳区鹦鹉大道498号，430056。
  • 基金资助:
    国家自然科学基金项目（52376122）

Study on the effectiveness of single-sided and double-sided mechanical smoke exhaust in the upper lane of a double-layer

Wang Enshi1, Wang Zhan2, Tang Zhi2, 3   

  1. (1. China Communication Second Highway Consultant Company, Hubei Wuhan 430056, China; 2. School of Civil Engineering, Wuhan University, Hubei Wuhan 430072, China; 3. Engineering Research Centre of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province, Hubei Wuhan 430072, China)
  • Online:2024-09-15 Published:2024-09-15

摘要： 为了探讨双层隧道上层车道顶部排烟时，单侧与双侧机械排烟对火灾烟气控制及蔓延的影响，采用FDS对某典型双层隧道在不同排烟控制模式下的烟气控制效果进行了对比研究。在说明模型合理性的基础上，对比分析了不同排烟风机开启模式下的烟气蔓延距离、排烟口处气体质量流率和温度变化规律。研究表明，开启隧道排烟道单侧风机和双侧风机时，排烟口处气体质量流率分布呈现不同规律，同时开启隧道两侧的排烟风机时烟气蔓延范围最小，是同等排烟量下只开启隧道下游一侧风机的47.8%~88.1%，且各排烟口处具有更低的平均温度，综合反映出同时开启隧道两侧的排烟风机具有更好的控烟效果。此外，探讨了在排烟道单侧和双侧排烟模式下隧道烟气蔓延范围随火源位置的变化规律。

关键词: 双层盾构隧道, 机械排烟, 烟气蔓延距离, 排烟口排气量, 温度场

Abstract: To investigate the impact of single-sided and double-sided mechanical smoke exhaust on fire smoke control and spread at the upper lane in a double-deck tunnel, FDS was used to conduct a comparative study on the smoke control effectiveness in a typical double-deck tunnel under different exhaust control modes.Based on illustrating the rationality of the model, the smoke spreading distance, gas mass flow rate and temperature distribution at the smoke exhaust vent were comparatively analyzed under different smoke exhaust fan opening modes. The study showed that the gas mass flow rate distribution at the smoke exhaust outlet shows different patterns when the exhaust fan is activated on the single-side or double-side. When the smoke exhaust fans on both sides of the tunnel are turned on, the smoke spread range is the smallest, which is 47.8%~88.1% of the exhaust fan on the downstream side of the tunnel are opened under the same smoke exhaust volume. And the average temperature at each smoke exhaust outlet is lower, which comprehensively reflects that turning on the smoke exhaust fans on both sides of the tunnel has a better smoke control effect. In addition, the variation of the tunnel smoke spread range with the fire source position under the single-side and double-side smoke exhaust modes was also discussed.

Key words: double-deck shield tunnel, mechanical smoke exhaust, smoke spreading distance, exhaust volume of smoke vent, temperature field