Preliminary study on fire causes of landmark buildings in Dalian! How bad is the current situation of external wall insulation?

Some netizens sighed: this kind of insulation layer is covered with gusset plate, there is a gap between gusset plate and insulation layer, and the fire spread rapidly along the gap, even if there is spraying, it can’t hit the fire point; The fire spread in the lower part of the corridor.

Sometimes it takes a few minutes.

According to the specifications, automatic fire alarm system, automatic sprinkler system, fire hydrant system, etc.

The building covers an area of 63000 square meters.

Many retired teachers lived in the apartment.

▲  “ Behind the “2.9” CCTV Fire Incident…

  As of 23:00 on August 27, the open fire in the building had been extinguished, and the residual fire was being cleaned up on the site, with no casualties.

If it is a super high-rise apartment building, it is a class of high-rise public building.

After it is set up, there is nothing to put out the fire; Third, the fire brigade is facing the adverse situation of large-scale fire fighting and control.

▲  ” 11.15 “Shanghai catastrophic fire accident on the evening of February 9, 2009, a catastrophic fire occurred in the television culture center of CCTV under construction.

When the fire has not been completely extinguished, the landmark building is on fire again, and the fire fighting is facing the situation of two-line operation.

At that time, the external wall insulation materials of the building may not be incombustible materials, which also led to the spread of fire along the external wall; Third, the building has a corridor at the top.

In this fire, the firefighters went deep into the fire floor and braved the fire and smoke on the top floor to control the spread of the fire.

It was very hard and dangerous.

that day, and the subway was temporarily closed.

▲  “ 12.2 “Shenyang fire accident on the evening of May 24, 2019, a fire broke out in Jinying shopping center located in Xinjiekou business district, Nanjing, and the fire burst into the sky.

after the fire, the property owner confirmed the fire and gave an alarm after asking for help and arriving.

Does this mean that the automatic fire alarm system did not act or that although it acted, the attendant in the fire control room did not effectively deal with it? According to the later fire video, the flame enters the building B and burns.

So, it’s too hard, too pit( Another reason to mention is that a fire broke out in a market in Dalian at about 13 p.m.

What is the reason for this? First, it burns very fast.

When the temperature reaches, a wall will be involved in the combustion instantly; Second, there are no fire-fighting facilities on the outer wall.

The investigation results of local fire departments on high-rise buildings show that the fire performance of building external insulation materials does not meet the standard, and the illegal use of combustible external insulation materials has become the main fire hazard of high-rise buildings.

By 10:20 on November 19, the fire had killed 58 people.

What are the differences of materials with different fire rating for exterior wall thermal insulation materials? How is it stipulated in the national standard? ▼▲ what are the fire protection requirements for exterior wall thermal insulation materials in staff Wu’s fire protection? What are the provisions in the code for fire protection design of buildings? ▼ 6.7.4 (mandatory provisions) for buildings with densely populated places, the combustion performance of external thermal insulation materials of external walls shall be class A..

The accidents have frequently taught a painful lesson ▼ at about 9 p.m.

Pay tribute to them.

After receiving the alarm, relevant departments of Dalian Jinpu new area quickly started the emergency plan, and relevant provincial, municipal and district leaders and fire and emergency departments rushed to the scene at the first time to coordinate and organize rescue.

Whether the automatic sprinkler system is started or not has not been officially announced, so further investigation is needed.

At the scene of the fire, firefighters stood on the roof not far from the fire with water guns, and black smoke billowed around.

In addition, there is a risk of setting up a position under the building.

When the high-pressure jet fire truck is spraying water, the parking and operation area is small, the location is unfavorable, and the water supply intensity is difficult to control the fire in a short time.

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After the property arrived, the room was full of smoke.

▲  ” 2.1 “Zhengzhou fire accident” on April 21, 2014, the outer wall insulation layer of yidajiete apartment building in Xinghai Square, Dalian, Liaoning caught fire, and smoke billowed instantly.

▲  “ 5.24 “Nanjing Golden Eagle fire accident on February 1, 2018, the external thermal insulation materials of Yuansheng international office building in Greenland, Zhengdong New Area, Zhengzhou, Henan caught fire.

At about 16:00 on August 27, a fire broke out in Triumph International Building in Jinpu new area, Dalian.

There were no casualties in the accident.

Special note: the external wall insulation project has lasted for about 30 years, especially from 2000 to 2014, the external wall insulation of a considerable number of buildings does not meet the requirements of the current specifications, and there is a risk of spread of the whole building in case of fire, which needs more attention.

Again and again, it reveals how bad the fire inspection and acceptance of external wall thermal insulation materials in current construction projects are! From 2017 to 2018, the Ministry of public security, the Ministry of housing and urban rural development and other six ministries and commissions jointly carried out the national comprehensive treatment of fire safety of high-rise buildings for half a year.

Many fire fighting forces in Dalian have invested in fire fighting and rescue.

In this regard, it is necessary to learn from the authoritative interpretation of the fire staff.

In the rescue, Dalian fire fighting adopts a 101 meter high platform fire truck to continuously fire the residual fire.

On the one hand, it is necessary to organize fire control in the direction of the outer wall, on the other hand, it is necessary to control from the inside to avoid the inward spread of the fire, and on the other hand, it is necessary to search, rescue and evacuate the personnel inside the building, which puts forward high requirements for the dispatch of fire forces, on-site organization, coordination and command.

The owner went to the property for help.

The fire formed three-dimensional combustion.

What is the current situation of exterior wall insulation? The site survey results are worrying! ▼▲ “comprehensive management of fire safety of national high-rise buildings” CCTV investigation reported that accidents again and again sounded an alarm to the industry.

Why did the fire burn so big? First of all, according to the official news, that afternoon, a household on the 19th floor caught fire.

The direct economic loss caused by the fire was 160 million yuan, and more than 70 people were investigated for responsibility after the accident.

▲  ” 4.21 “Dalian fire accident at 14:00 on November 15, 2010, a high-rise apartment on Jiaozhou Road, Yuyao Road, Shanghai caught fire.

When fireworks spread to this part, it is easy to store heat and expand the fire( Why is it so difficult to put out a fire when it spreads to the bottom of the corridor? After the 19th floor household fire, 127 fire engines and 558 firefighters from five fire brigades were dispatched, and helicopters and 101 meter high fire engines, the highest in China, were dispatched.

Are fire fighting facilities functioning? According to the code for fire protection design of buildings, this building has 31 floors.

If this notification is true, that is to say, the residents and properties have defects in the initial fire fighting and alarm, which has delayed some time; Secondly, the building was opened in 2008 and put into use in 2009.

The “thermal insulation of the external wall” has become the “fire killer” again.

Since the building fire-fighting facilities are installed inside, there are no fire-fighting facilities on the outer wall.

on December 2, 2019, a fire occurred in the residential area of SR international new town, Hunnan New Area, Shenyang City, Liaoning Province, which was caused by the fire of the thermal insulation materials of the external wall, with a total of 25 buildings on fire, The fire site is the outer wall of the 5th floor and above.

Fires caused by the thermal insulation layer of the external wall or due to the rapid spread of the thermal insulation layer occur almost every year…

Even if it is not a super high-rise building, the 31 floors are at least more than 90 meters high, which should be classified as a class of high-rise public building.

For the external control high-pressure jet truck, there are many jet blind areas, which is impossible to really stop the fire; The corridor between the two towers is directly baked by the fire at the lower part, which is not only easy to burst into the room, but also the building components of the outer wall will deform rapidly, forming a large number of falling objects, which directly threaten the surrounding personnel and vehicles.

The fire fighting lasted more than 7 hours, which was very difficult to put out the fire.

The design and construction of building exterior wall thermal insulation materials must comply with national standards and select materials that meet the requirements of fire rating.

The falling of combustibles on the outer wall is easy to cause personal injury and damage to combat vehicles and equipment.

For a fire, the speed of plane combustion is relatively slow, but the vertical combustion is not fast.


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