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一車庫防火分區和防煙分區面積較大

A large area of fire and smoke compartments in a garage

依據GB50067―14《汽車庫修車庫停車場設計防火規范》每個防火分區的大允許建筑面積為2000，設置自動滅火系統的地下車庫，其防火分區按4000劃分，在每個防火分區內部一般劃分兩個防煙分區，每個面積不大于

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

二車庫層高

Second garage floor height

為減少土建的造價，車庫層高控制應盡量低。規范規定地下車庫凈高不得低于2.2m，因此本人覺得單層車庫梁下凈高不得小于2.8m，否則不能避讓電纜橋架消防噴淋管道等，風管布置相當有困難。

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

車庫風機房的選擇，既要考慮本專業的合理性，又要兼顧排風，豎井出地面的位置防火要求與周圍建筑保持一定距離，而且也要結合景觀不影響交通組織，另外送排風口還必須保證有一定的距離。

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.

地下車庫排煙系統設計

Design of smoke exhaust system for underground garage

設計原則

Design principles

地下車庫每個防煙分區應獨立設置排煙系統。在系統設計合理的前提下，排風排煙系統合用，以節約地下車庫空間。盡量采用自然補風。

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.

防煙分區

Smoke prevention zone

一般情況, 對于一二級耐火等級的建筑，該大允許面積為2000，且如果車庫內設有自動滅火系統時，面積還可增加一倍，由此帶來的一個重要結果就是防煙分區面積的大幅度增加。由于防煙分區不能跨越防火分區，所以防煙分區大建筑面積亦可達到2000，該面積的增大自然減少了車庫內排煙系統的數量。例如，面積不超過2000的車庫，只設一個排煙系統就可以了。

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.

排煙量

Smoke exhaust volume

按《車庫規》，此例只要設計一個排煙系統即能滿足要求。假定車庫的計算凈高為2.8m，此時不管庫內有無滅火系統，排煙量均為30000/h（注意規范規定即為風機風量），設計人員根據排風量選擇合用風機為單速或雙速。

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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