A is the river view building and B is the city view building. The building in the film is Building B, which has 108 floors and can accommodate more than 5,700 people. AB is connected by a sky bridge on the 70th floor. It should belong to a class of high-rise buildings, but the building in the film does not meet the specifications of a class of high-rise buildings. The temperature was 2-3 degrees higher than usual that day. Everyone was preparing for a large dinner party. The kitchen pots caught fire. One of the cooks had a wrong way to put out the fire. He added water and the fire was extinguished. Therefore, the building was found. The problem - too many stoves, but not enough exhaust facilities to meet the human ventilation, fresh air needs. The sprinkler does not have enough water, so it cannot be extinguished in the initial stage of the fire, when the combustion is still local, the fire is unstable, and the average indoor temperature is not high. Above the 60th floor there was no water and the drains leading to the outside were frozen. The number of fire extinguishers was increased, but the issue was not taken seriously and was instead asked to get ready for the party first. In order to make Christmas gifts, the president of the building still chose to use a helicopter for snowfall when he was informed in advance that there was a strong air current. However, due to the strong air current, the helicopter lost control and crashed into the building and exploded, causing a fire. The fuel used by the helicopter is gasoline, and the burning of gasoline causes a fire, which should be a Class B fire. High-rise fires have the characteristics of rapid fire spread, difficulty in evacuation and difficulty in fighting. As a result, the fire could not be extinguished in the early stage, and it entered the stage of fire development. All combustibles burned violently, and the temperature rose linearly, producing a large amount of smoke that was harmful to the human body. Some people entered the elevator in a hurry to escape, but when a fire broke out, the line could be blown, resulting in a short circuit, and people would be trapped in the elevator. The elevator shaft leads directly to each floor of the building. When the smoke from the fire field pours in, it is very easy to produce a chimney effect, the elevator is closed, and the inhalation of high-temperature smoke can cause burns to the respiratory system, damage to organs, difficulty in breathing, and even suffocation. The elevator does not have the characteristics of high temperature protection. In the event of a fire, the high temperature will burn the skin, feet, shoes and clothes like the people in the film. The existing fire rescue capability is seriously out of balance with the development of high-rise buildings. I didn't see the high-rise building set up a refuge layer and emergency escape and self-rescue devices. Finally, blasting was adopted to prevent the fire from spreading to the surrounding buildings and to prevent the building from collapsing and collapsing to the nearby buildings due to the long-term burning, the melting of the steel bars, the rupture of the cement. With the rapid development of the city With the development of various functions, large buildings, underground buildings, high-rise and super high-rise buildings have increased, and fire hazards have increased. Building firefighting equipment engineering should effectively monitor building fires, control fires, and quickly extinguish fires. Through building indoor and outdoor fire hydrant water supply systems, automatic sprinkler systems, smoke prevention and exhaust systems, gas fire extinguishing systems, automatic fire alarms and fire protection facilities linkage control system , to meet the fire protection needs of various buildings and reduce the occurrence of fire accidents.
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