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关键词：高层建筑；消防设计；灭火器；消火栓；喷淋系统
The general description of the design：The object of the fire protection design for a building, a total construction area of the project is about 24481.97m2, the total construction floor area of17744.2m2 (including the insulating layer), 19 story main building of this project, a total of 73.4 meters high, a class of high-rise, the fire resistance rating level. Building service life of 50 years.
The design should be calculated and expanded preliminary design to complete the building ground building fire system design, including the total construction fire protection design, calculation of smoke exhaust design, construction,safety evacuation design, calculation, indoor and outdoor fire hydrant design,calculation, calculation and design of automatic sprinkler system, fire extinguisher, calculation, the design of automatic fire alarm system, calculation and calculation manual and drawings.
According to the "code for fire protection design of tall buildings" GB50045－95 (2005 Edition), combining with the design target for the building, building height over 50m and other factors, determine the construction classes as a class, to determine the fire resistance rating of 1.
The object of high-rise building, the safety evacuation facilities mainly refers to the evacuation staircase staircase, evacuation passage, exit and safety elevator. Safe evacuation routes set approximately walkways - room, staircase.The minimum net width of evacuation staircase of not less than 1.2m, between the two exit distance is not less than 5m, the design of exit width is 4.54m.
On the indoor fire hydrant layout, outdoor fire hydrant shall be uniformly distributed along the building, set the installation was easy to find, easy to operate. Design and layout of the outdoor fire hydrant 3, models for ground hydrant, hydrant button with a DN150 and 2 DN65, outdoor fire water supply pipe arranged in a ring, the design of outdoor fire water for 30L/s. For indoor fire hydrant, fire hydrant full water column height 11.45m, radius of protection28.1m fire hydrant, fire hydrant spacing 25.98m, vertical tube number 7. The most unfavorable point fire hydrant hydrostatic pressure is 0.599MPa, the effective volume of tank fire 18m3, fire water quantity is 1, the effective volume of 365.3m3, the calculated 81m fire pump head, flow rate of 43.22L/s. Indoor fire hydrant water for 40L/s. Selection of ISW100-250I horizontal centrifugal pump, lift 80m, speed 2900r/min, efficiency 77%, motor power 55kW, NPSH4.8m. The two groups of this type of pump, one with a prepared.
For the automatic sprinkler system, set the hazard level is pided into the dangerous level of I level, system form the wet automatic fire-extinguishing sprinkler system, the central branch network management. Sprinkler system with square layout, spacing of 3.4m, each nozzle actual protection area 11.56m2, area 17m long side, short side 9.4m, area size is 173.4m2, in the area of branch for the 3 row, 5 nozzles per row, a total of 15 nozzle. Building the most disadvantageous sprinkler discharge is 69.36L/min, pressure is 0.075MPa. System design flow rate is 987.63L/min, vertical pipe at the bottom end of the pressure is 0.2988MPa. Selection of ISW65-200IA horizontal centrifugal pump, lift 40m, efficiency 67%, speed of 2900r/min, motor power 11kw, NPSH 30.m. Indoor fire hydrant system as the two group of this type of pump, one with a prepared.
The building is a high-rise comprehensive building construction, fire danger rating for design and calculation of pided into serious danger level. Possible A, class E fire. Building each layer is a fireproof partition and calculation unit,each layer of protection area were: a layer of 1524.08m2, two 1589.87m2,three 1641,06m2, four 1640.9m2, five 750.95m2, six to eighteen 738.36m2,nineteen 702.21m2, one to four layers of each layer is arranged 3 fire extinguisher set point, each set point 2 extinguisher; four to nineteen each layer is provided with 2 fire extinguisher set points, each point 2 extinguisher.Selection of MF/ABC5 type fire extinguisher portable ammonium phosphate dry powder fire extinguisher, led by the number of layer to the four layer of each layer of 6 extinguisher, five layer to the nineteen layer, each layer 4, a total of 84 extinguisher.
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