High-rise buildingsHuge in size and complex in function
Dense personnel, many sources of danger, large fire load
In the event of a fire.
Personnel evacuation and fire fighting
There are still great difficulties.
How to "get out of the way".
It is also a skill that everyone should know and master
Read this in two minutes, so that you don't get lost at the critical moment!
With the rapid construction of the city, the number of high-rise buildings is increasing.
However, once a high-rise building catches fire.
The fire spread extremely quickly.
After a fire.
Rescue is difficult.
Easy to cause huge.
Loss of life and property.
So always be on the lookoutHigh-rise fire safety
q
What is a Tall Building?
a
Generally speaking, residential buildings with a building height of more than 27m, and non-single-storey factories, warehouses and other civil buildings with a building height of more than 24m are high-rise buildings.
q
Why pay special attention to high-rise fire safety?
a
High-rise buildings often have the characteristics of large volume, complex functions, dense personnel, etc., and the building contains many sources of danger, once a fire occurs, it is difficult to evacuate personnel and fire fighting in the first time.
q
Why is it difficult to extinguish fires in high-rise buildings?
Flammable and combustible external thermal insulation materials
Flammable and combustible external insulation materials have become an important part of high-rise building firesChina began to implement the building energy conservation policy in 2005, one of the main measures is to increase the insulation layer on the exterior wall, due to the lack of awareness of the danger of external wall insulation materials, there is no clear provision on the combustion performance of the material, and it was used at that timePolystyrene foam board or polyurethane rigid foamand other flammable and combustible materials, these materialsIt is very easy to ignite and spreads rapidly, and produces a large amount of toxic smoke after combustionThe risk of fire is high.
The "chimney effect".
The "chimney effect" caused fires in high-rise buildings to spread rapidly. The "chimney effect" refers to the phenomenon of indoor air rising or falling along the vertical slope of space, causing air convectionAfter a fire breaks out in a high-rise building, the smoke spreads vertically at a speed of 3-4m s through stairwells, pipe shafts, glass curtain wall gaps and other partsIt is possible to quickly ignite the entire building.
"The wind fuels the fire".
Wind-fueled fires "make fires in high-rise buildings difficult to control." It has been determined that the wind speed at a height of 10m in the building is 5m s, and the wind speed at a height of 30m is 87m s, 60m high wind speed 123m s, 90m high wind speed 15m s,Because the upward wind speed is faster, after the fire breaks out, there is often a situation where the wind helps the fire, the fire borrows the wind power, and the more it burns, the more vigorous it becomes.
High-rise buildings at the time of construction.
There are strict fire safety requirements and fire protection design.
Fireproof partition, normally closed fire door
Positive pressure air supply system, automatic sprinkler system
Automatic fire alarm system, fire control room, etc
can effectively prevent and control fires.
After a fire.
Don't blindly escape, these rules must be remembered.
Source: Shandong Fire Department.
Editor: Xiao Longfeng.
Proofreading: Song Shuwen.
Reviewer: Zhao Ping.