The basic method and principle of U-shaped glass curtain wall waterproof design

1.All sealed and waterproof

This method is a kind of waterproof method which is widely used in the U-shaped glass curtain wall project of our country at present, and it is also a simple method. It is the use of sealant has a strong corrosion and aging resistance, tensile properties, fatigue resistance, elastic joint properties to plug the method of joint, that is, the use of sealants to strictly conduct all the control of the gap, so that the building during the life cycle to ensure that the joints do not produce cracks. The waterproof reliability of this method all depends on the material performance of the sealant, the design of the framework and the quality of construction, therefore, the sealant should comply with the relevant provisions in“Glass U-shaped glass curtain wall engineering technical code”(JGJL02 -2003) , and should be strictly in accordance with the construction rules of joint glue injection construction.

In the U-shaped glass curtain wall top and the civil structure of the main junction of the place also has a similar situation, such joint treatment is all sealed treatment. But the construction means is simple, the joints are not careful in the construction, such as civil and U-shaped glass curtain wall construction coordination, materials, interface, etc. 

2.Open joint construction waterproof

Some gaps in the U-shaped glass curtain wall do not use sealant seal, allowing water into the open gap, but should ensure that water can not always penetrate into the U-shaped glass curtain wall, finally, the water will be through a specially designed way to drain or natural evaporation, this way known as the open joint structure waterproof, also known as the collection of drainage. In our country, there is no such open joint construction method in U-shaped glass curtain wall.

This paper analyzes various design ideas and methods of waterproofing of U-shaped glass curtain wall, and some problems of joint structure and construction of U-shaped glass curtain wall, and the design of waterproof joint structure of U-shaped glass curtain wall, it is related to many factors such as material quality, structure design, construction operation and so on. In these factors, we should start from the design and construction, scientific and standardized use of sealing materials waterproof quality must be able to achieve a great degree of improvement.