Who can tell me about the dry hanging construction steps of marble?

2. Stone dry-hanging installation process

The stone dry-hanging installation process is: placing control lines → laying out stone rows → selecting stones → pre-arranging stones → driving expansion bolts → installation Steel frame → Install adjustment piece → Stone grooving → Stone fixation → Gluing → Adjustment → Finished product protection.

2.1. Base layer treatment

(1) Clean the surface of the base layer of the wall, and remove any protruding parts that may affect the installation of the skeleton.

(2) Check the strength and compactness of the facing base layer and structural layer, and they should meet the requirements of the design specifications.

(3) Check the wall according to the position of the decorative wall, and chisel parts of it to ensure sufficient decorative thickness.

2.2. Place control lines

(1) Before the stone dry-hanging construction, a 50cm horizontal control line and the elevation line of each layer of stone must be popped up on the wall according to the design elevation, and placed on the wall. Make control piles on the wall, pull wires to control the horizontal position of the wall, and find out the rules and squareness of the room and wall.

(2) Determine the installation position of the metal expansion anchor bolt according to the elastic lines of the stone grid.

2.3. Select stone

After the stone arrives at the site, the material, processing quality, pattern and size must be inspected, and any defects such as large color difference, missing corners, chipped edges, etc. Defective stone was singled out and replaced.

2.4. Pre-arrange the stones

Number the selected stones according to their use parts and installation sequence, choose a relatively flat site for pre-arrangement, and check whether the spliced ??blocks exist Color difference and whether it meets the on-site size requirements. After completing this work, store the plates according to numbers for later use.

2.5. Drill expansion bolt holes

According to the designed stone slab and frame design requirements, determine the spacing of the expansion bolts, determine the spacing of the expansion bolts, mark the drilling points, and use an impact drill to Drill holes in the structure to install expansion bolts. The size of the holes is determined according to the specifications of the expansion bolts, and the spacing is generally controlled at about 500mm.

2.6. Installing the skeleton

(1) For non-load-bearing hollow brick walls, galvanized channel steel and galvanized angle steel are used as the skeleton when dry hanging stone, and galvanized channel steel is used The main keel is used, and the galvanized angle steel is used as the secondary keel to form a skeleton network (on the concrete wall, pendants can be directly connected to the wall).

(2) Before installing the skeleton, cut the materials according to the size required by the design and plate arrangement, use a bench drill to drill out the installation holes of the skeleton and apply anti-rust paint.

(3) According to the control line on the wall, use Φ8-Φ14 expansion bolts to fix it on the wall, or use embedded steel plates to weld the frame and steel plates. The welding quality should comply with the specifications. It is required to fully weld, and then apply anti-rust paint after removing the welding slag.

(4) The channel steel frame is made of No. 6.3 channel steel, and the angle steel is L40*40*4 (mm) or L50*50*5 (mm). When installing the frame, attention should be paid to ensuring verticality and flatness, and wire pulling should be controlled to make the wall or room square. The channel steel and angle steel used in the frame of this project are galvanized steel.

2.7. Install the adjusting piece

The adjusting piece is determined according to the specifications of the stone plate. The adjusting pendant is made of stainless steel and is divided into 40mm*3 and 50mm*5. It is processed according to the design requirements. Use screws to connect to the frame, and the adjustment pendant must be installed firmly.

2.8. Grooving of stone

Use a marble machine to groove the side of the stone before installation. The depth of the groove is determined according to the size of the pendant. Generally, it is required to be no less than 10mm and on the back side of the plate. center. In order to ensure that the groove does not collapse, the distance between the groove and the edge should be 1/4 of the side length and not less than 50mm. Pay attention to cleaning the lime in the groove to ensure that the glue is firmly bonded.

2.9. Stone installation

(1) Starting from the bottom floor, install the hanging vertical lines upward in sequence. The material, color, texture and processing dimensions of the stone should be checked.

(2) Place the stone lightly on the T-shaped pendant according to the stone number, adjust the exact position according to the line, and clean the hole immediately. Inject repair-resistant glue into the groove to ensure that the anchoring glue has 4- 8h solidification time to avoid premature solidification and brittleness, too slow solidification and loosening.

(3) Tighten the bolts after correcting the verticality and flatness of the plate. When installing, attention should be paid to the handover and interface of various stone villages to ensure that the stone installation is in a circle.

2.10. Requirements for leaving gaps

Since the dry-hanging stone walls in this project are in a constant indoor temperature and humidity state, the expansion and contraction of the stone can be ignored, so the gaps between the stone plates Adopt tight seam splicing, no glue required.

2.11. Cleaning

After the stone is mounted, use cotton gauze and other soft objects to initially clean the dirt on the stone surface. After it has gelled, use a wallpaper knife, cotton gauze, etc. Clean the stone surface. Waxing should generally be carried out according to the operating methods of wax. In principle, hard wax should be ironed and soft wax should be rubbed. It is required to be even and not reveal the background color, the color and luster are consistent, and the surface is clean.

3. Key control points

(1) Stone ordering and processing: Carry out sampling, numbering, and ordering processing of stones according to the designed stones and stone samples; the quality of stone processing must be guaranteed quality.

(2) Inspection of stone materials when entering the site. When the stone materials enter the site, they must be inspected according to the specifications, varieties, colors and patterns of the facing stones required by the design. The quality of the stone materials must meet the design and construction requirements; the stone materials should be qualified Certificates and inspection reports. After passing the inspection, they should be stacked in the order of numbers on the stone layout plan to ensure backup.

(3) Steel frame: The main materials of the steel frame used for dry-hanging stone include channel steel and angle steel. Galvanized steel is evenly used for wood projects and is fully prepared according to specifications. Channel steel and angle steel must have certificates and According to the inspection report, the material should meet the design requirements; the welding parts are all fully welded, and the welds are treated with anti-rust treatment.

(4) For other accessories, choose stainless steel pendants and fixing bolts between the pendants and the frame (generally φ12). Both stainless steel pendants and bolts should have certificates of quality, and stainless steel pendants should have stress test reports; After arriving at the site, they should be inspected in time and properly stored. Before use, the dry hanging parts should be sampled and conducted on-site pull-out tests. After confirming that the test data complies with the test report, they can be used in a large area.

(5) Prepare expansion bolts according to site conditions and design requirements, generally φ8-φ12.

(6) All window casings and windows should be left with a margin when plastering them. Check the joint connections of each part. Any discrepancies between the site and the design drawings should be corrected in a timely manner. The verticality and flatness of the wall should be checked, and those that need treatment must be processed before proceeding to the next process.

(7) When storing stones, they should be kept indoors or in a shed to avoid exposure to the sun and rain. Square wood should be placed under the stones. Straw ropes should not be used to wrap the stones to prevent water contamination. . Stones should be prevented from being bumped when stored and transported. After installation, the wall should be shielded and protected to avoid accidental damage.