倒虹段凹型管廊电缆舱火灾温度场及CO分布规律研究
Study on fire temperature field and CO distribution law of concave pipe gallery cable cabin in inverted rainbow section
耿加良 1米红甫 2邹碧海 2罗珩博 2贺静2
作者信息
- 1. 中国石化西北石油局,乌鲁木齐,830011;重庆科技大学安全工程学院,重庆,401331
- 2. 重庆科技大学安全工程学院,重庆,401331
- 折叠
摘要
为给火灾情况下地下综合管廊电缆舱的结构设计及廊内消防逃生提供指导,利用FDS软件研究了不同纵向坡度(0%～15%)、火源位置、风速下倒虹段凹型电缆廊道发生火灾时的温度场变化及CO分布规律.结果表明:顶棚温度与坡度呈非线性关系,坡度为 9%时顶棚温度最高,拐点处易受坡度角影响产生不同程度的蓄温;倾斜段管廊起火时更容易诱发管廊高温塌陷,产生的CO浓度更高,拐点处发生火灾时对管廊结构造成热损伤的威胁性最大;凹型管廊CO浓度及分布受通风影响较大;开启通风有利于廊内人员消防逃生,缩小结构热损伤范围.研究结果可为管廊消防设计及人员逃生提供参考.
Abstract
This paper is motivated by the need to guide the structural design of cable compartments in underground comprehensive utility tunnels and fire evacuation within the galleries during fire incidents.The FDS software is used to investigate the temperature field variation and CO distribution in concave-shaped cable corridors with different longitudinal slopes(0%～15%),fire source locations,and wind speeds.The results show that the roof temperature has a non-linear relationship with the slope,the highest roof temperature is found at a slope of 9%,and the inflection points are susceptible to different degrees of temperature storage affected by the slope angle.When the inclined section of the corridor catches fire,it is more likely to induce high-temperature collapse and generate higher concentrations of CO.The inflection point poses the greatest threat of thermal damage to the corridor structure when a fire occurs.The concentration and distribution of CO in the concave-shaped utility tunnel are significantly influenced by ventilation.Opening up ventilation is beneficial for the fire evacuation of personnel inside the corridor and reduces the range of structural thermal damage.The research findings can serve as a reference for the fire design of utility tunnels and personnel evacuation.
关键词
凹型管廊/电缆火灾/FDS/温度场/CO分布Key words
Concave utility tunnel/Cable fires/FDS/Temperature field/CO distribution引用本文复制引用
基金项目
重庆科技大学研究生创新计划项目(YKJCX2220714)
出版年
2024
NETL
NSTL
万方数据