将隧道温度场随时间的变化和人员的逃生速度引入到传统克拉尼公式中, 给出了一个基于温度变化的修正的隧道火灾人员逃生判别公式。采用数值模拟方法, 详细研究了典型隧道结构在不同隧道风速(v=1、2、3、4、5 m·s-1)下不同火灾规模时隧道内的温度场, 以修改后的克拉尼公式为公路隧道火灾时的安全逃生判别条件, 给出了不同隧道风速、不同火灾规模时的消防救援的安全位置。结果表明:为了防止高温回流对消防救援的影响, 在消防救援时, 隧道内的环境风速应不小于5 m·s-1。
Abstract
The changing temperatures and escaping speed of people were introduced in traditional Cranee formula, the criterion formulae of escape based on the changing temperatures on highway tunnel fire were given. The temperature fields of the typical tunnel under different wind speeds and scales of fire were studied in detail by the numerical simulation method. Using modified Cranee formula as the criterion of escape on highway tunnel fire, the safe locations for fire rescue under different wind speeds and scales of fire were determined. Results show that in order to avoid the influence of high temperature circumfluence on fire rescue, circumstance wind speed in tunnel should not be less than 5 m·s-1.
关键词
隧道工程 /
隧道火灾 /
数值模拟 /
安全位置 /
消防救援
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Key words
tunnel engineering /
tunnel fire /
numerical simulation /
safe location /
rescue
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中图分类号：
U458
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脚注
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基金
交通部行业联合科技攻关项目(20033531404)
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