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The auto-spray system adopts the design of wet-type auto-spray fire extinguishing system. In accordance with regulations and rule, this building is regarded as I class of danger categories. This design chooses the layout of nozzle in the form of square. Determine the location and shape of the most disadvantaged areas of role in the area, the most negative point of the active area has 14 nozzles, the active area is 161.84m2, the most negative point of the nozzle, it has flow of 69.36L / (min • m2). System design flow is 29.76L/s. Pipelines total loss 0.51708MPa, the elevation difference between most negative point hydrant and lowest level of fire pond is 1.0545MPa, working pressure of the fire fighting equipment at the most negative point is 0.08MPa, so the sprinkler pump’s lift is 165m, flow 29.76L / s, selected one XBD18/40-150 × 9 Model fire sprinkler pump, with a preparation, set 4 fire pump adapter. Set a fire pond, the effective volume of it is 108m3. Set fire water tank, the effective volume of it is 18m3.
Aiming at Grade A office building, this design does a smoke-proof design including rating the fire-proof rank in line. The fourth floor is calculated for example on behalf of the aerial parts, the fan flow is 28756.2m3/h, the fan pressure is 372.93Pa, select one HTFC-I-NO22 type of fire ventilation fan with low noise cabinet centrifugal, with motor: Y160M-4, power 11Kw. Underground garage is pided into four smoke partitions, 1-1 District calculated fan flow: 79332m3/h, pressure is 232.5Pa, select one HTFC-I-NO40 type of fire centrifugal fan; 1-2 zone fan flow: 65280m3/h, pressure is 252.26Pa, select one HTFC-I-NO36 type of fan; 2-1 zone fan flow: 36751m3/h, pressure is 290.93Pa, select two HTFC-I-NO27 type of fan; 2-2 zone fan airflow: 74184m3/h, pressure is 409.29Pa, select one HTFC-I-NO40 type of fan.
The automatic alarm system selects smoke-sensing fire-detecting equipment, The building’s protection level is A so as to select centralized alarm system, and set the fire control room. Design choose the smoke detector, every layers pided into two detection unit, detector protection area is 60m2, protection radius is 5.8m. By calculation, the numbers of detectors arranged on the first floor are 26, 16 on the second floor, 35 on 3th to 27th floor and 75 on the basement.
Key words: high-rise building; Multifunction office building; fire protection system design; hydrant system; automatic sprinkler systems
目录
1.绪论 1
1.1 高层建筑消防安全现状与设计重点 1
1.1.1 国内外高层建筑消防安全现状 1
1.1.2 我国高层建筑存在的问题 1
1.1.3 高层建筑消防安全防控对策与设计重点 3
1.2 设计项目概况 4
1.3 设计任务和主要内容 5
2.确定耐火等级和建筑总平面设计 6
2.1 确定建筑物耐火等级 6
2.2 防火间距 6
2.3 消防车道 7
3.建筑平面防火设计 8
3.1 防火分区 8
3.1.1防火分区分类和划分原则 8
3.1.2划分防火分区 9
3.2 防烟分区 10
4.安全疏散设计 12
4.1 设置安全疏散路线 12
4.2 安全出口的布置 12
4.3 防烟楼梯间的设计 13
5.灭火器配置设计 14
5.1 确定配置场所危险等级与火灾类型及灭火器类型 14
5.2 计算灭火器设置参数 15
5.2.1 保护面积的计算 15
5.2.2 计算单元所需最低灭火级别 15
5.2.3 确定灭火器设置点数与位置 16
5.2.4 灭火器设置点最小需配灭火级别计算 17