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 ›› 2021, Vol. 40 ›› Issue (7): 987-990.

• • 上一篇    下一篇

低氧条件下综合管廊电缆舱火灾行为研究

刘欣1,2,3，朱国庆1,2,3，徐刚1,2,3   

  1. 1. 中国矿业大学城市地下空间火灾防护江苏省高校重点实验室，江苏徐州221116；2. 中国矿业大学公共安全与消防研究所，江苏徐州221116；3. 中国矿业大学安全工程学院，江苏徐州221116
  • 出版日期:2021-07-15 发布日期:2021-07-15
  • 作者简介:刘欣（1998-），男，山东日照人，中国矿业大学安全工程学院硕士研究生，主要从事火灾科学研究，江苏省徐州市泉山区大学路1 号，221116。
  • 基金资助:
    国家自然科学基金资助项目(2016YFC0802900)

Study on fire behavior of cable cabins in utility tunnel under low oxygen concentration

LIU Xin1,2,3, ZHU Guo-qing1,2,3, XU Gang1,2,3   

  1. 1. China University of Mining and Technology, University Key Laboratory of Urban Underground Space Fire Protection, Jiangsu Xuzhou 221116, China; 2. Institute of Public Safety and Fire, China University of Mining and Technology, Jiangsu Xuzhou 221116, China; 3. Faculty of Safety Engineering, China University of Mining and Technology, Jiangsu Xuzhou 221116,China
  • Online:2021-07-15 Published:2021-07-15

摘要： 为研究综合管廊电缆舱在低氧气浓度下的火灾行为，通过注入液氮的方式形成低氧环境，将电缆布置在距离中心0、30、60 cm 位置处，进行缩尺寸管廊实验，并与正常氧气浓度下的实验进行对比。研究发现，在低氧气浓度下，火焰面积减小，且在火源靠近侧壁的情况下，火焰的弯曲程度减小；对纵向温度作无量纲处理后进行拟合，得到两种氧气浓度下的纵向温度衰减经验公式；横向最高温度均出现在火焰垂直方向对应的顶棚位置附近，低氧气浓度下的最高温度低于正常氧气浓度下的最高温度，在火源靠近侧壁的情况下，受火焰温度影响，导致温度差增大。

关键词: 综合管廊, 低氧气浓度, 火焰面积, 纵向温度分布, 横向温度分布

Abstract: In order to study the fire behavior of the cable cabins of the utility tunnel under low oxygen concentration, a low oxygen environment was formed by injecting liquid nitrogen. The cables were arranged at locations 0, 30 and 60 cm away from the center to carry out the scaled tube gallery test, and the test was compared with that under normal oxygen concentration.It is found that at low oxygen concentration, the flame area decreases, and the flame bending degree decreases when the fire source is near the side wall. After dimensionless treatment, the longitudinal temperature was fitted, and the empirical formula of longitudinal temperature attenuation at two oxygen concentrations was obtained. The maximum temperature in the transverse direction is near the ceiling position above the flame. The maximum temperature in the low oxygen concentration is lower than that under the normal oxygen concentration. When the fire source is near the side wall, the temperature difference increases due to the influence of the flame temperature.

Key words: utility tunnel, low oxygen concentration, longitudinal temperature filed, transverse temperature field