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The office building Guangming Food Science and Technology Research and Development Fire protection design of the project is to code for fire protection design of nation building and related industry standards as the basis, combined with the actual engineering situation to carry out related work. Through scientific and rational design, to enhance the level of building fire safety, security personnel in the building purpose. The concrete design content includes: building fireproof rank determination, construction general layout, fire hydrant water supply system design, design, safety evacuation design, the design of automatic sprinkler system, alarm design, architectural design of the smoke control system and fire extinguisher. The project A, B, C, D four buildings are multi-storey buildings, fire resistance rating for a level, design C floor as template for the fire, evacuation, automatic sprinkler system, fire extinguisher, fire hydrant water supply system, smoke control system etc .
The minimum distance between the office bright group overall architecture and surrounding building is 16 meet the specified. Around 4 office buildings is provided with an annular fire lane. The partition of fireproof this project to C building as an example, the building automatic fire extinguishing system, the maximum allowable size double fire, into 5000m2, and C, each layer in the construction area of about 2200m2, so the pision of each layer is a horizontal fire district, part of the vertical pipe well hole, staircases, the elevator shaft and the window of vertical spread of fire, pided into vertical fireproof partition. The separate partition for a fire district fire treatment. Because of the design of the building as a fire resistance rating of public buildings, the evacuation time is 6min. After calculation, each fire district to the total width of evacuation safety exit 3m, staircases and room evacuation door every 100 people to 0.25m, safety exit each fire district, indicating some dairy group office building in the safe evacuation is not pressure, design drawings on each safety evacuation door width 1.5m, in accordance with the provisions.
The office room is pided into the following categories: office, meeting room, training room, staff dormitory, usually use for computer, sofa, furniture, paper, wires and cables and electrical and electronic components and other combustible solid. According to the situation above, fire danger rating is configured for the dangerous level and serious danger level combination. After calculation, set up a total of 52 MF/ABC4 fire extinguishers,each fire extinguisher set point matching 1-3 extinguishers.
This engineering fire hydrant full water column length is 3.5m, the pressure water gun nozzle is 11.45m, water gun water flow rate 5L/s, fire protection radius of 28.1m, fire hydrant spacing is 24.9m, riser number is 4, the most unfavorable pipe hydrant pressure is 0.1893MPa, the effective volume of fire water tank is 25.9m3, outdoor pipe network of water supply is 11.8L/s. Fire lift of pump 46mH2O, flow rate 15.89L/s. 3 sets of ground outdoor fire hydrant were 1 DN100mm and 2 DN65mm bolts, pipe network layout in a circle.
Fire danger rating setting automatic sprinkler system in place for the dangerous level (Level 1), a wet system, nozzle distance 3.3m. After calculation, protection area of nozzle is 9.43m2, the most unfavorable point of the nozzle flow is 65.34L/min, pressure is 0.0667MPa, the most unfavorable point flow coefficient at the bottom of the K is 845.5, the flow rate was 1770.13L/min.
Smoke exhaust system design is combined with natural ventilation and mechanical exhaust way proof in building. Smoke control system of staircases and atria are using natural way, by the openable window natural smoke. A, B building corridors and rooms with openable window natural smoke exhaust, B building is set to independent smoke pision, do not set the exhaust system. C, D floor aisle setting mechanical exhaust system, exhaust fan is arranged on the roof. Underground garage by smoke zone setting mechanical smoke exhaust system. The exhaust fan use centrifugal fire fan, the fan is arranged in front of 280 ℃ closing fire control valve, exhaust all upward. One to four layers of maximum exhaust volume is 60000m3•h-1.