What is the U-shaped glass curtain wall and How to install and construct a U-shaped glass curtain wall？
U-shaped Glass Curtain Wall Installation
U-shaped glass is named because of its U-shaped cross-section. Its materials are waste glass and quartz sand glass curtain wall decoration. The material is melted at a temperature of about 1470 ℃, and it is produced successively by the calendering method. The temperature of the glass ribbon coming out of the calendering unit is about 850 ℃~900 ℃, and the successive glass ribbons are then sent to the U-shaped glass forming machine. The U-shaped glass ribbon after forming must undergo annealing treatment in the annealing furnace to ensure excellent annealing.
The structure of U-shaped glass 1
The U-shaped glass curtain wall has good functions in light transmission, heat insulation, heat preservation, sound insulation, etc. It has high mechanical strength, simple construction, excellent construction, and decoration effects, and can save a lot of metal materials.
The structure of U-shaped glass 2
In terms of sound insulation: U-shaped glass single-row equipment with a thickness of 5 mm~6 mm, the sound insulation effect of U-shaped glass curtain wall is roughly the same as that of single-piece flat glass of the same thickness, which reaches 27 dB, and the U-shaped glass of double-row equipment reaches 38 dB, and the sound insulation effect is strong. In a single row, the sound reduction effect is 10 dB higher, and the double-layer U-glass sound insulation effect is not lower than that of the traditional clay brick wall.
In terms of thermal conductivity: the heat transfer coefficient of the single-row U-shaped glass curtain wall is 4.95 W/(m2·K), and the heat transfer coefficient of the double-row glass is 2.4 W/(m2·K). The use of double-row equipment can meet the energy-saving requirements. In terms of light transmission effect: U-shaped glass curtain wall with small markings on the surface, the light transmittance is 89% for single-row equipment, and 81% for double-row equipment, which can ensure the lighting of the east and west stairs through the building curtain wall design Claim. The U glass surface is embossed with a pattern image, which makes it have light diffusion characteristics, and the appearance of the curtain wall is more comfortable.
Mechanical strength: As the U-shaped glass curtain wall has a channel-steel-shaped section, it has higher mechanical strength and rigidity than ordinary flat glass curtain walls. The compressive strength can reach 700 N/mm2~900 N/mm2, and the tensile strength can reach 30 N/mm2 ~50 N/mm2, the bending strength reaches 38 N/mm2, the Mohs hardness reaches 6~7, the elastic modulus reaches 60000 N/mm2 ~ 70000 N/mm2, and the linear expansion coefficient reaches 75~85. ×10-7, it is a kind of building curtain wall with high hardness. When the double-row U-shaped glass equipment is connected, the joints are tightly sealed, and the air can not pass through, so the heat insulation effect is good. When the double-row equipment is selected, no external wall is necessary. Insulation can also meet energy-saving requirements and is suitable for use in hotter and colder areas.
The U-shaped glass curtain wall is divided into two types: horizontal and vertical without hidden or vertical and horizontal without hidden.
Regardless of the structure of the glass curtain wall, in the deepening design of the curtain wall, one corresponding side is bonded with structural glue to form glass equipment components, and the other corresponding side uses aluminum alloy inlaid glass equipment. In other words, the various loads on the glass of the building curtain wall are transmitted to the aluminum alloy structure by structural glue on one corresponding side, and the aluminum alloy structure is transmitted to the aluminum alloy structure by the aluminum alloy profile inlaid groove on the other corresponding side. Therefore, the above-mentioned connection method of the structural glass curtain wall is indispensable, otherwise, it will constitute a corresponding side to bear the full load of the glass, which will be very dangerous.
U-shaped glass curtain wall construction method one:
Fully understand and refer to the curtain wall deepening design drawing, paste the glass on the glass frame with equipment grooves on the two vertical sides, and fix the vertical edge of the glass frame on the vertical rod of the aluminum alloy sash system with fixing pieces; The edge is fixed in the inlay groove of the aluminum alloy frame body groove beam. The bonding between the glass and the vertical edge of the glass frame is completed by processing and injecting glue in a special workshop in the factory. The surface of the building curtain wall material is clean and the bonding quality is good. The glass frame is shipped to the on-site equipment only after the structural glue is completely cured, and the bonding quality is guaranteed.
The actual effect of U-shaped glass curtain wall 1
U-shaped glass curtain wall construction method two:
According to the curtain wall design drawing, the coated glass is first fixed in the inlay grooves of the top and bottom aluminum alloy profiles, and a glue joint empty groove is formed on the surface of the glass and the vertical rod, and then the structural glue is filled into the glue joint empty groove on the spot. It constitutes a vertical structural plastic glass equipment system. Since this production method is to inject glue on-site, the surface of the material is clean and dry, and it is difficult to fully guarantee the environmental cleanliness during glue injection, and it is often subjected to wind load before the structural glue is cured, which affects the bonding strength. Generally, it is limited to buildings with no equipment space between the building and the aluminum alloy structure system, unless it is a last resort, it is not suitable for use. Various methods are used to temporarily shut down the glue injection site during the on-site glue injection. The aluminum and glass bonding surfaces used in the building curtain wall should be surface cleaned. Generally, the site should not be on-site on strong winds, rainy days, and icing in winter. Injection glue. Recently, we have discovered that for simple construction and fast progress, some manufacturers should inject the glue in the factory and then the equipment structure, instead of processing in the factory, but injecting the glue on the spot, this is very wrong and should be stopped.
The actual effect of U-shaped glass curtain wall 2
The horizontal and vertical non-concealed glass curtain wall system adopts the method of structural glass equipment in the horizontal direction and uses the aluminum alloy glass inlay trough to fix it in the vertical direction. The specific method is to bond the glass to the glass frame with equipment grooves on the upper and lower sides. The upper frame of the glass frame is supported on the beam of the aluminum alloy sash system, and the lower frame is fixed on the beam with the fixing piece, and the vertical side is fixed on the beam with a pressure plate, and the vertical side is fixed in the glass insert groove of the vertical rod with a pressure plate, forming a whole glass curtain wall from top to bottom, which is divided into a long strip by the vertical rod pressure plate. It is not possible to inject glue on-site, and it is also not allowed to inject glue on site.
U-shaped Glass Curtain Wall Construction
On-site measurement and setting-out: use theodolite and level for construction control.
For the overall control and detailed measurement of the east and west ends of the building, the measurement and control network points are arranged so that the structure of the building curtain wall (channel steel beam) can be used as a basis to achieve positioning accuracy. According to the accurate data measured on-site, the advantages of the external thermal insulation industry of building exterior walls in our country are obvious and the future is bright. The horizontal and vertical elevations of the curtain walls are marked in detail to facilitate the construction of equipment.
Beam construction: Loft and cut the beam of the building curtain wall, and fix the 30# channel steel on the outside of the reinforced concrete beam according to the direction of the suspension line.
Fixed frame: Fix the frame material on the stressed steel beam. After adjusting the level of the frame, fix the frame on the steel beam with expansion bolts. There are at least three fixing points on each side of the frame. After the frame is fixed, place hard foam plastic as the expansion joint material at the bottom of the inner side of the frame, and paste it on the inner side of the two wings of the frame. Pads to ensure the free expansion and contraction of the U-shaped glass curtain wall.
Embedded parts and U-glass equipment: Cut the product plastic parts with a stable effect into corresponding lengths according to the guidance of the curtain wall design drawing, and put them into the upper and lower profiles of the frame. Pierce the U-shaped glass strips sequentially. The depth of the U-shaped glass piercing into the upper frame should be ≥20 mm, the depth of piercing the lower frame should be ≥12 mm, and the depth of piercing the left and right frames should be ≥20 mm. When the U-shaped glass is inserted into the end If the width of the hole and the width of the glass are not the same, the glass is cut along the length direction, and the cut glass is installed in the order of the end glass equipment.
The Installation and construction of U-shaped glass curtain wall
The fully hidden frame glass curtain wall is made into a structural glass effect. This pressing plate is not only a horizontal or vertical decorative line but also fixes the glass for the second time, which improves the safety of the building curtain wall. It can also change the shape and color of the pressing plate.
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