(1) Installation of embedded parts: Embedded parts shall be buried during civil construction. Before curtain wall construction, the embedded parts shall be inspected and rechecked according to the datum axis, midline and datum leveling points of the project. In general, the allowable deviation of position and size is 20mm. ..
When the position of embedded parts is out of tolerance, they can't be used or leaked, the scheme of selecting expansion bolts should be put forward according to the actual situation, and submitted to the design unit for examination and approval, and the pull-out test should be done on site and recorded.
(2) Measuring unreeling: 1. Because of the large allowable error in civil construction and the high precision required in curtain wall construction, it is impossible to rely on the civil horizontal datum line, so it is necessary to carry out retest through the datum axis and leveling points, and make correction and review.
2. Determine the curtain wall positioning line and bottom grid line according to the design.
3. Theodolite or laser collimation instrument will lead out the external angle and internal angle of curtain wall, and use the steel wire fixed on the steel bracket as the marking control line.
4. Use level gauge and standard steel tape to draw elevation lines of each layer.
5. Determine the center line of each facade.
6. The distribution of measurement errors should be controlled in the process of measurement, and the errors should not be accumulated.
7. Measurement and setting-out shall be carried out under the condition that the wind force is not greater than level 4, and shielding measures shall be taken.
8. All facade decoration projects should set a unified baseline and pay attention to construction cooperation.
(3) The installation metal skeleton is 1. Check the lofting position according to the construction layout.
2. Install the iron pieces for fixing the mullion.
3. Install the mullions at both ends of the same facade first, and then install the intermediate mullions in turn by pulling wires.
4. Lead each construction horizontal control line to the mullion and check it with a level.
5. Install the metal beam according to the design size.
The beam must be perpendicular to the mullion.
6. When welding, finished product protection shall be carried out for the lower and adjacent finished decorative surfaces.
Symmetrical welding should be adopted in welding to reduce the deformation caused by welding.
After the weld quality is qualified, all solder joints and welds need to be deslagging and antirust, such as brushing antirust paint.
7. After the metal skeleton is completed, the next working procedure can only be carried out after the concealed works are inspected by the supervision company.
(4) The fireproof and thermal insulation materials shall be installed as 1. Qualified materials must be used, that is, the factory certificate is required.
2. There should be no gap between each floor and the stone curtain wall, and a fire zone should be formed with galvanized steel plate and fire-resistant cotton.
3. In the cold area in the north, the insulation layer should have a waterproof and moisture-proof protective layer, which should be packed and fixed in a metal skeleton and should be tight and firm.
4. When the curtain wall insulation layer is constructed, the insulation layer should have a waterproof and moisture-proof protective layer, so that it can be tightly and reliably wrapped and fixed in the metal skeleton.
(5) Install stone veneer 1. Classify the stone facing transported to the construction site according to the number, check whether the size is accurate, whether there is any damage, lack of stare blankly, corner drop and other phenomena, and transport the stone facing to the vicinity of the construction surface in layers according to the construction requirements, paying attention to reliable placement.
2. According to the datum line of the curtain wall surface, carefully install the first leather slate at the bottom.
3. Pay attention to the elevation of each leather metal pendant. The metal pendant should hold the veneer of the upper cortex tightly, leaving a gap with the veneer of the lower cortex.
4. During installation, stone glue should be injected into the pin hole or notch of the decorative plate to ensure the reliable connection between the decorative plate and the pendant.
5. When installing, it is advisable to finish the edge of the stone slab around the humanly scaled opening first, so as to avoid installation difficulties.
6. When installing to the elevation of each floor, pay attention to adjust the vertical error, and do not accumulate.
7. There should be safety protection measures when handling the slate, and the following should be padded when placing it.
(6) After the cleaning and protection construction is completed, peel off the adhesive tape paper on the slate surface, clean the stone surface with water and detergent, and wax or brush the protective agent as required.
2. Metal curtain wall 1, process flow: measuring and setting out → anchor pieces, installation → skeleton fabrication and installation → panel installation → caulking and gluing → cleaning and cleaning up 2. Process flow: ① According to the actual situation of design and construction site, accurately measure the outer line and horizontal vertical control line of the setting-out curtain wall, and then bounce the vertical frame center line of the skeleton onto the structure according to the designed frame size.
The survey and setting-out shall be carried out under the weather condition that the wind force is not greater than Grade 4, and windproof measures shall be taken in some cases.
(2) The ground anchor shall be installed with embedded parts as far as possible, and the rear embedded parts without embedded parts shall be adopted. The structural form of embedded parts should meet the design requirements, and the anchor bolts should be pulled out on site, and can only be used after reaching the strength requirements.
Anchor generally consists of buried plate and connecting angle steel. During construction, according to the design requirements, accurately mark the position of the built-in parts on the center line of the measured mullion, then punch holes to fix the built-in parts, lead the center line of the mullion to the built-in parts, then calculate the position of the connection angle, mark the built-in parts with lines, and test the connection angle position on the same side of the mullion with lines without deviation.
After the position of angle steel is determined, the angle steel shall be welded to the buried plate according to this position, and the width and length of the weld shall meet the design requirements. After welding, the joint should be derusted again, and generally coated with antirust paint twice.
(3) The size of the skeleton shall be determined according to the construction drawing and the actual situation at the site. The skeleton materials shall be laid down at the site and transported to the site for installation. Before installation, the control line of the skeleton skin shall be hung according to the design size. The hanging line must be accurate, and its control quality will directly affect the quality of curtain wall decoration. If the skeleton adopts aluminum alloy profiles, it is generally connected by bolts, and insulating gaskets shall be added between the skeleton and the connectors. The material specifications and quality of bolts shall meet the design requirements and specifications. If the skeleton is made of steel, the connectors can be connected by bolts or welding. The welding quality shall meet the design requirements and specifications, and shall be rusted again.
The quantity, specification, location and anti-corrosion treatment of various embedded parts connected with the main structure and curtain wall must meet the design requirements.
The connection between the metal frame of curtain wall and the embedded parts of the main structure, the connection between columns and beams, and the installation of curtain wall panels must meet the design requirements, and the installation must be firm.
(4) The panel installation panel should choose the appropriate fixing method according to its material. In general, self-tapping nails should be directly fixed on the frame or fixed with self-tapping nails after adding corner aluminum at the edge of the panel. Before installing the decorative panel, the position of the panel should be marked on the frame, and lines should be drawn to control the vertical and horizontal position of the whole wallboard.
When installing, the fixed point should be stressed evenly, and the board surface should not be squeezed or knocked to avoid concave-convex or warping deformation. At the same time, the decorative board should be handled with care to avoid bumping and damage to the surface paint film.
Panel installation should be firm, the number of fixed points should meet the design and specification requirements, and the construction quality should be strictly controlled during construction to ensure smooth surface and straight joints.
⑤ Sealing and gluing: Glue with weatherproof glue of the same color as the design. Before gluing, insert a 2-4 mm wide foam stick into the joint of the board, and the embedding depth should be uniform. Generally, the coating thickness is 1/2 seam width.
When gluing, the decorative plates on both sides of the joint should be protected by sticking masking paper to prevent pollution. After gluing, the glue joint should be scraped into a concave surface with a special scraper before the surface is solidified. The bonding surface should be smooth and round, and there should be no sag and wrinkle. After scraping, the masking paper on both sides of the seam should be torn off immediately.
Glue bonding is not suitable for rainy days.
The sealant for silicon tunnel structure should be fully injected and carried out in a clean room with the temperature of 15℃ ~ 30℃ and the relative humidity exceeding 50%.
Don't write notes on the website wall.
⑥ Cleaning: After curing, clean the whole curtain wall with clear water. Some heavily polluted places can be cleaned with organic solvents, but it is forbidden to scrape with sharp objects to avoid damaging the decorative board.
After cleaning, special personnel shall be designated for protection, and warning signs shall be set in obvious positions to prevent pollution or damage.