China Faces Three Major High
In recent years, with the process of urbanization throughout the country to speed up
, row upon row of tall buildings has become one of the hallmarks of urban modernization. And rapid high-rise designs Technology And development of the situation than the high-level research and application of fire fighting and rescue lagging behind, more and more prominent fire and rescue problem.
Experts suggested that fire departments should be based on self-help mechanisms, increased research into high-rise fire overcome technical difficulties to cope with high-rise fire fighting this worldwide problem.
"Chimney effect" increasing destructive power of fire
2008 statistical year, Shanghai over 24 meters tall and 1.3 thousand buildings. According to the Shanghai Fire Bureau revealed that all high-rise building fire safety standards are achieved.
Deputy director of Shanghai Institute of disaster prevention and relief Luo Qifeng Description: High-rise fire Extremely destructive, fighting extremely difficult, multi-channel characteristics of fire spread. High destructive power of fire from high-rise buildings to some extent the "chimney effect"?? High-rise buildings within a large number of pipes, shafts, stairwells, elevator shafts, exhaust and other horizontal, vertical tube wells, passageways, from the ground all the way to the top. The event of fire, these areas became a pull style of "chimney" to accelerate the spread of fire, and the spread of multi-speed. But the higher the building, "chimney effect" is visible. According to the Shanghai Fire Bureau
test data show a height of 100 meters of high-rise buildings, in the case of non-stop, smoke spread along the vertical tube wells to the top just 30 seconds, and instantly the whole building can be form a "three-dimensional scene."
Luo Qifeng that a large number of cases at home and abroad show that not only high-rise building fires, and very prone to fire. From the appearance of high-rise buildings are constituted by the flame retardant material, in fact, a lot of internal fuel, the material is not only easy to ignite, and burning also produces large amounts of toxic smoke. Although the high-rise buildings will not burn, but when the temperature reached 400? 500 , the reinforced concrete, cracks will make about half the intensity decreased. In addition, within high-rise Electric Criss-cross lines, electrical equipment, many disastrous consequences in case of fire. As the story, evacuation and fire fighting difficult, often result in serious consequences Qunsiqunshang.
Face three major constraints to high-rise fire
Recent years, domestic and international high-rise building fires often occur, if they can not be effectively controlled at the initial stage, until the development of severe stage, even if there is sufficient well- Fire Equipment Equipment and troops, but also difficult to control and fight, bound to the country and the huge losses of life and property.
Shanghai Fire Bureau fire experts Zhou Meiliang analysis, the current high-rise building fire fighting limitations focused on three main areas:
One, held held high vehicle height restrictions. China held high the best available fire trucks can reach 50 meters high, equivalent to more than ten-story high (although there are a few areas of vehicles equipped with climbing 80 meters, 100 meters, but did not spread across the country), limits on the height of the floors above the trapped officers, fire fighters could not hold the high use of rescue vehicles, and the use of Water gun Or water jet gun attack outside the effect will be greatly reduced.
Two firemen climbing capacity. Firemen who are charged with 20 kg of equipment to climb at least need to spend a lot of physical strength, reach the fire floor will be because of exhaustion, to combat drop.
3, climb path restriction. When the fire lift Power supply Close, move up to the high vehicle height when less than a fire, firefighters can only choose to climb up the stairs along the internal evacuation, this time one by the stairs of the smoke evacuation performance impact, and second, the crowd will happen with the hedge down the evacuation, not only affected the population of the evacuation rate, but also hindered the firefighters climbing speed delay.
Experts recommend increased research efforts high-rise fire
High-rise fire problem facing the world, now has little outside the effective solution.
China Faces Three Major High
By: ryyy
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