[China Glass Network] A detailed case of anti-corrosion plugging analysis of the common glass curtain wall leakage phenomenon, discuss the rational solution, proposed the waterproof structure and measures of the glass curtain wall plugging.
In the practice of glass curtain wall, water leakage is a quality problem that owners can feel more directly and more annoyed everyday. It has become one of the more common ills in glass curtain wall for many years. The water seepage of the glass curtain wall is very complicated, and it touches on all aspects of design, data application, construction and management. It is necessary to strengthen the discussion, formulate effective measures, and comprehensively manage and prevent problems. Below we will analyze the main reasons for the leakage of several common curtain walls and analyze the treatment plan.
First, the roof glass curtain wall leaks
The xx brigade building in the central area of ​​Shenzhen, which was first opened in August 2009, was only opened for half a month. In the torrential rain of the typhoon “Morafi†on July 19, 2009, the glass curtain wall roof leaked and its indoor leakage level was similar. Light rain, the room was leaked and "wet", showing the level of water leakage. According to the results of the initial pace check, “the water leakage should be that the junction of the glass curtain wall on the roof is not sealed enough.†The main body of the building is a unitized curtain wall, which is higher than the frame-shaped glass frame wall with a glass curtain wall of about 20 meters above the roof! From the situation of on-site inspection, the main reason is that the opposite side of the glass curtain wall is not sealed enough, and it is sealed by the rubber strip. The rainwater leaks from the sealing strip to the beam and then flows down the aluminum main column. Later, the management office arranged a thick sealant on the reverse side of the glass curtain wall of the worker's glass curtain wall. As a result, there was still a slight rainwater leakage in the event of heavy rain. It may be caused by the leakage of rainwater from the exposed glass curtain wall (discussed below). The thorough treatment plan of the roof glass curtain wall should adopt the disconnected waterproof structure measures.
Second, the exposed glass curtain wall leaks
This is a typical bright-framed glass curtain wall node. In practice engineering, there will be subtle water leaks. The main reason is that the aluminum briquettes are usually made of 50mm in length and placed one at a distance of 350mm. The ordinary thickness of the aluminum moldings is 1.5mm. At the cloud markings, the aluminum moldings Gluing between the glass and the glass, because there are no aluminum briquettes and strips under some positions, the glue should not be able to effectively control the quality. After one or two years, the sealant is prone to cracking and other problems, causing the curtain wall to leak and breathe!
Treatment plan: aluminum briquettes should be long, effectively control the quality of the glue; secondly, the implementation of gap treatment using sealant plus tape.
Third, the glass curtain wall can open a partial leak
The opening window of the xx brigade building project in the central area of ​​Shenzhen is the 70 series of hook-type hidden frame hanging windows. The window locks use multi-point locks. Each window sash has 5 full locking points, and the average locking point is scattered. When the window sash is averaged, it is strongly pressed against the window frame, so that the sealing strip to the window has a certain level of average tightening amount. It can be said that the opening window in this state is a good watertightness. There is a slight leak.
Specific plugging treatment plan:
1. When designing, we still set a tight-type water-blocking sealing strip at the top of the window according to the principle of isobaric waterproofing, which prevents the rainwater from directly contacting the sealing strip of the opening window, and further effectively improved. Open the watertightness of the window.
2. Carefully use the hook-type hidden frame on the hanging window, many people will not use the wind bracing, so that the best effort to pull the wind bracing, the top of the window above the limit block is broken, the entire glass opening fan fell to the downstairs accident Start.
3. The lower part of the framed glass curtain wall window is also a key part of water leakage prevention. It should be filled with aluminum alloy and embedded with rubber strip to seal the glue. The second is to pay attention to open the lower end of the fan glass to set the glass holder to prevent the construction glue from being subjected to gravity.
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