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山西太原一高层建筑起火,已致3人遇难,23人受伤!火势为何会迅速向上蔓延?

  • 2026-03-30 15:34:52
山西太原一高层建筑起火,已致3人遇难,23人受伤!火势为何会迅速向上蔓延?

3死23伤!一高层建筑突发大火

山西太原一高层建筑起火,已致3人遇难,23人受伤!

据新华社消息,3月28日晚,山西省太原市小店区亲贤北街附近的一高层建筑发生火灾。目前遇难人数已升至3人,另有23人受伤,其中9人伤势较重。起火原因正在调查中,善后处置工作也正同步进行。

随着经济的发展

城市中的高楼大厦也逐渐增多

高层建筑体量庞大、功能复杂

人员密集、火灾荷载大

一旦发生火灾

蔓延速度快、救援难度大

很可能造成

严重的人员伤亡和财产损失

01

江苏南京“2·23”居民楼火灾

2024年2月23日,江苏南京明尚西苑小区6号楼一楼架空层的电动车凌晨起火,火势通过天井烟囱效应迅速蔓延至高层,导致15人死亡、44人受伤。

02

上海静安“11·15”公寓楼火灾

2010年11月15日14时,上海余姚路胶州路一栋高层公寓起火。公寓内住着不少退休教师,起火点位于10-12层之间,整栋楼都被大火包围着,楼内还有不少居民没有撤离。至11月19日10时20分,大火已导致58人遇难。

03

英国伦敦“6·14”公寓楼火灾

2017年6月14日,英国伦敦24层67米高的格伦费尔公寓大楼一4层住户家中冰箱起火,引燃厨房,火焰蹿出窗外引燃外墙保温层,形成立体燃烧,火焰几乎蔓延到了大楼所有楼层,最终造成72人死亡。

高层建筑起火

“杀伤力”为何如此之大?

高层建筑火灾

火势为何会迅速向上蔓延?

“杀伤力”为何如此之大?

👇👇👇

帮凶一:“烟囱效应”

“烟囱效应”会致使高层建筑火灾迅速蔓延。

什么是“烟囱效应”

“烟囱效应”是指户内空气沿着垂直坡度的空间向上升或下降,造成空气加强对流的现象,高层建筑发生火灾后,烟气通过楼梯间、管道井、玻璃幕墙缝隙等部位以3-4m/s的速度竖向蔓延,可以将整个建筑物迅速引燃

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“烟囱效应”的形成原理

“烟囱效应”是如何形成的?消防员做了一组实验演示。消防员首先点燃了实验器具,模拟在空旷的地方起火,火焰小且燃烧稳定。

接着,消防员用两截玻璃管围住起火点,模拟高层建筑当中的烟囱结构。可以看到,刚才稳定燃烧的小火苗瞬间变成了猛烈的火旋风。

原来,当火焰燃烧时,烟气的分子间距增大变轻,有上升的浮力,底部的气压降低,外部的空气由于压力差的作用从缝隙进入底部补充燃烧,形成向上的气流,为火灾提供了源源不断的氧气,进而形成了猛烈的火旋风,也就是“烟囱效应”。

帮凶二:易燃可燃外保温材料

易燃可燃外保温材料成为高层建筑火灾的重要“帮凶”。我国从2005年开始推行建筑节能政策,主要措施之一就是在外墙增加保温层,由于以前对外墙保温材料危险性认识不足,对材料的燃烧性能并无明确规定,当时多采用聚苯乙烯泡沫板或聚氨酯硬质泡沫等易燃可燃材料,这些材料极易引燃且蔓延迅速,燃烧后产生大量有毒烟气,火灾危险性很大。

帮凶三: “风助火势”

“风助火势”造成高层建筑火灾难以控制。据测定,在建筑物10m高处风速5m/s;30m高处风速8.7m/s;60m高处风速12.3m/s;90m高处风速 15m/s,由于越向上风速越快,火灾发生后往往会出现风助火势、火借风威,越烧越旺的态势。

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  1. CONNECT:[ UseTime:0.000911s ] mysql:host=127.0.0.1;port=3306;dbname=h460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001977s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000820s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.015467s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001617s ]
  6. SELECT * FROM `set` [ RunTime:0.000634s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001517s ]
  8. SELECT * FROM `article` WHERE `id` = 492332 LIMIT 1 [ RunTime:0.001052s ]
  9. UPDATE `article` SET `lasttime` = 1774867112 WHERE `id` = 492332 [ RunTime:0.009389s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000751s ]
  11. SELECT * FROM `article` WHERE `id` < 492332 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001791s ]
  12. SELECT * FROM `article` WHERE `id` > 492332 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000953s ]
  13. SELECT * FROM `article` WHERE `id` < 492332 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001876s ]
  14. SELECT * FROM `article` WHERE `id` < 492332 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002940s ]
  15. SELECT * FROM `article` WHERE `id` < 492332 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002236s ]
0.234402s