一车库防火分区和防烟分区面积较大

A large area of fire and smoke compartments in a garage

依据GB50067―14《汽车库修车库停车场设计防火规范》每个防火分区的大允许建筑面积为2000，设置自动灭火系统的地下车库，其防火分区按4000划分，在每个防火分区内部一般划分两个防烟分区，每个面积不大于

According to GB50067-14 "Code for Fire Protection Design of Car Repair Garages and Parking lots", the maximum allowable building area for each fire compartment is 2000. For underground garages equipped with automatic fire extinguishing systems, their fire compartments are divided into 4000. Generally, two smoke prevention zones are divided inside each fire compartment, with each area not exceeding 4000

二车库层高

Second garage floor height

为减少土建的造价，车库层高控制应尽量低。规范规定地下车库净高不得低于2.2m，因此本人觉得单层车库梁下净高不得小于2.8m，否则不能避让电缆桥架消防喷淋管道等，风管布置相当有困难。

To reduce the cost of civil engineering, the height control of the garage should be as low as possible. According to the regulations, the net height of the underground garage should not be less than 2.2m. Therefore, I believe that the net height under the beam of a single-layer garage should not be less than 2.8m. Otherwise, cable trays, fire sprinkler pipes, etc. cannot be avoided, and the layout of air ducts is quite difficult.

三地面限制因素多

Multiple ground limiting factors

车库风机房的选择，既要考虑本专业的合理性，又要兼顾排风，竖井出地面的位置防火要求与周围建筑保持一定距离，而且也要结合景观不影响交通组织，另外送排风口还必须保证有一定的距离。

The selection of the garage fan room should not only consider the rationality of the profession, but also take into account the ventilation. The fire prevention requirements for the vertical shaft above the ground should maintain a certain distance from the surrounding buildings, and it should also be combined with the landscape to not affect traffic organization. In addition, the air supply and exhaust outlets must also ensure a certain distance.

地下车库排烟系统设计

Design of smoke exhaust system for underground garage

设计原则

Design principles

地下车库每个防烟分区应独立设置排烟系统。在系统设计合理的前提下，排风排烟系统合用，以节约地下车库空间。尽量采用自然补风。

Each smoke control zone in the underground garage should be equipped with an independent smoke exhaust system. Under the premise of reasonable system design, the exhaust and smoke exhaust system can be used together to save underground parking space. Try to use natural ventilation as much as possible.

防烟分区

Smoke prevention zone

一般情况, 对于一二级耐火等级的建筑，该大允许面积为2000，且如果车库内设有自动灭火系统时，面积还可增加一倍，由此带来的一个重要结果就是防烟分区面积的大幅度增加。由于防烟分区不能跨越防火分区，所以防烟分区大建筑面积亦可达到2000，该面积的增大自然减少了车库内排烟系统的数量。例如，面积不超过2000的车库，只设一个排烟系统就可以了。

In general, for buildings with a fire resistance rating of level one or two, the maximum allowable area is 2000, and if an automatic fire extinguishing system is installed in the garage, the area can be doubled. An important result of this is a significant increase in the area of smoke prevention zones. Due to the fact that smoke control zones cannot cross fire zones, the large building area of smoke control zones can also reach 2000. The increase in this area naturally reduces the number of smoke exhaust systems in the garage. For example, a garage with an area not exceeding 2000 can be equipped with only one smoke exhaust system.

排烟量

Smoke exhaust volume

按《车库规》，此例只要设计一个排烟系统即能满足要求。假定车库的计算净高为2.8m，此时不管库内有无灭火系统，排烟量均为30000/h（注意规范规定即为风机风量），设计人员根据排风量选择合用风机为单速或双速。

According to the Garage Regulations, this example only requires the design of an exhaust system to meet the requirements. Assuming the calculated net height of the garage is 2.8 meters, regardless of whether there is a fire extinguishing system in the garage, the smoke exhaust volume is 30000 hours (note that the standard is the fan air volume). The designer selects the shared fan as single speed or double speed based on the exhaust air volume.

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