First, the wall dry hanging stone operating conditions
1. After the structure has been inspected and accepted, the procedures of hidden inspection and pre-inspection have been completed, and the installation of hydropower, ventilation and equipment has been completed.
2. Slate according to the specifications of the design drawings, varieties, quality standards, physical and mechanical properties, the number of preparation, and surface treatment work.
3. The exterior doors and windows have been installed, and the inspection meets the stipulated quality standards.
4, has been prepared stainless steel anchors, embedded rubber, sealant, glue gun, foam plastic strips and hand-held power tools.
5. The construction operator should provide technical disclosure and should emphasize technical measures, quality standards and product protection.
6, first do a model, self-inspection by the quality inspection department, reported to the owner and design appraisal qualified before they can organize personnel to carry out large-scale construction.
Second, the wall dry hanging stone construction process
1. Acceptance stone: Acceptance of stone should be performed by a person in charge, and carefully check whether the stone specification and model are correct according to the design requirements and whether it is consistent with the material list. If it is found that the color is obviously inconsistent, it should be placed separately to return the manufacturer.
2. Set up scaffolding: Use steel pipe fasteners to set up double-row scaffolding, requiring that the distance between the poles and the wall surface is not less than 500mm, and the distance between the short crossbars and the wall surface should not be less than 300mm, and the frame body and the main structure should be firmly anchored and the shelves should be fully covered. Shop the ramp and set the safety net on the outside.
3, measuring the pay-off line: the first to be hanging stone walls, cylinders, doors and windows with a special large-line fall or theodolite to find the vertical from top to bottom. At the same time, the thickness of the stone and the distance between the outer wall of the stone and the surface of the structure should be taken into consideration. Generally, 60 to 80 mm is appropriate. Determine the horizontal line according to the height of the stone and mark it on the wall. The general plate gap is 6-10mm. The line of play shall be divided from the center of the outer wall facing to the sides and up and down, and the error shall be uniform.
4. Drilling the groove: Before the stone plate is installed, measure the exact position, and then drill the groove. For the reinforced concrete or brick wall, first drill the hole at 80 to 100mm from the hole center at both ends of the stone plate. The depth is 20-25mm. Then drill a hole with a diameter of 8-10mm in the wall relative to the slotted hole in the stone plate. Insert one end of the stainless steel expansion bolt into the hole and fix the anchorage at the other end. For reinforced concrete columns and beams, due to the high reinforcement ratio of the components and the large rebar area, it is difficult to drill and groove in some locations. When measuring the elastic line, you should first avoid the rebar position on the column or wall surface and mark it accurately. The drilling position, after drilling and fixing the anchor bolts of the expansion bolts, drilling and slotting at the corresponding position of the stone plate.
5, the bottom stone installation: the installation of the underlying stone, should be based on the fixed wall of the stainless steel anchor position to install, the specific operation is to install the stone slot and anchor fixing pin alignment, the use of rectangular bolt bolt holes, Adjust the leveling of the slate, and find the square of the yin and yang angle on the square ruler, and look for the slats on the slats straight. Then fix the slate firmly with the anchor, and fix the anchor with the anchoring glue.
6. Assembling the ascending slate: first insert the solid glue into the pin hole of the next row of slate, wipe the residual glue, and place the ascending slate in accordance with the operation method of installing the bottom slate. Check the installation quality and fix it after meeting the design and specification requirements. For parts that are difficult to fix on the stone tops, such as stumbling blocks, the same method can be used to fix the sides of the slate.
7. Sealing joints: After the slate is attached, perform surface cleaning and remove the dust in the gaps. Use the foamed plastic strips with diameters of 8 to 10 mm to fill the inside of the sheets, and leave 5 to 6 mm deep seams on the slate on both sides of the seams. Glue 10~15mm wide plastic tape by seams to prevent contamination of the board surface when the glue is applied. Then use a glue gun to fill the sealant. If the sealant contaminates the board, it must be wiped clean immediately. Finally, remove the tape, clean the surface of the slate, polish and polish, and remove the scaffold after reaching the quality standard.
Third, the wall dry hanging stone construction method
1. Stone Preparation: Select and classify the color of the stone by colorimetric method. The color of the stone installed on the same surface should be the same, and the stone number should be numbered according to the design drawings and the order of blocks.
2. Grassroots preparation: Clean up the surface of the prefabricated stone facing the building. At the same time, the structure is set to find the rules, and the vertical and horizontal lines are popped up. According to the design drawings and the actual needs of pop-up installation of the stone's position line and block line.
3. Hanging line: According to the requirements of the design drawings, before the stone is installed, use the theodolite to hit the vertical control line on both sides of the big angle. It is better to play it at a position 20cm away from the big corner so that the exact line of the vertical thread can be inspected at any time to ensure Install smoothly and mark up and down the control line.
4. Underlying veneer panel brackets, pre-arranged brackets will be supported on the top level of the slab to be installed. The support shall be firm and shall be connected to each other. It may also be connected with the shelves. After the supports are in place, the 50mm thick planks shall be laid through the nails in the direction of the supporting brackets, and the planks shall be on the same horizontal plane. Ensure that the stone is on the same level below.
5, on the connection of iron: stainless steel bolts designed to fix the angle steel and steel plate. Adjust the position of the flat steel plate so that the small hole of the flat steel plate just faces the insertion hole of the stone plate, fix the flat steel plate, and tighten with a wrench.
6, the bottom of the stone installation: the side of the iron connection is good, we can put the floor panel on a corner of a place.
7, adjust the fixed: After the panel temporarily fixed, adjust the level, such as the surface of the board is not flat, in the bottom of the plate at the end of the mouth of the flat steel plate connected with a corresponding double stranded copper wire mat. Adjust the verticality and adjust the distance from the wall of the stainless steel connector on the panel to the wall gap until the panel is vertical.
8, the top panel installation: the top of the last layer of the panel in addition to understanding the general stone installation requirements, the installation and adjustment is good, in the structure and the gap in the stone hanging a long 20mm thick wooden bar, wooden bar flat for the stone plate down 250mm, The hanging point can be set on the connecting iron. After the wooden strips are lifted, the fillers can be put in the gap between the slab and the wall, and the packing is tight to prevent the slurry from leaking during grouting.
9. Clean the surface of marble and granite: Remove the antifouling strips on the surface of marble and granite, and clean the slate with cotton.
Fourth, the wall dry hanging stone finished product protection
1. Scientifically arrange the construction sequence. The construction of water, electricity, heating, ventilation, and equipment installation should be done well in advance to prevent damage and contamination of the external stone decorative panels.
2. It is necessary to wipe away cleanly the debris, dust, adhesive, oil stains, fingerprints, water and other debris left on the door and window frames, glass and metal decorative panels in a timely manner; it is necessary to paste a protective film to prevent pollution and rust.
3. When disassembling shelves or loading materials, it is forbidden to collide dry hanging stone slabs.
4. After the finishes are finished, the edge of the easily damaged part should be made of wood to protect the corners. When working with other types of work, it shall prevent scratching of the painted surface.
5. When the surface of the outdoor brush is not dry, it is strictly prohibited to pour garbage, residue soil or flipping the scaffolding.
6. Finished exterior stone finishes should be assigned to a special person to guard against acts of endangering finished products such as scribbling on the veneer.
7, construction precautions
8, different colors: In order to prevent inconsistent appearance of stone color, construction should be carefully selected before the stone board and try spelling.
9, line angle is not straight, sewing uneven: in order to prevent the line angle is not straight, the grid is not uniform grid is not straight, construction should be carefully designed according to the size of the actual size of the construction drawings, sub-blocking block line to be precise and detailed , And often pull the horizontal line and hang vertical line to check the correction.
Fifth, the quality standards of the wall dry hanging stone
(a) Master project
1. The varieties, specifications, performance and grades of materials used in stone wall projects shall comply with the design requirements and the provisions of the current national product standards and engineering technical specifications.
2. The form, elevation, color, luster, pattern and pattern of the stone wall should meet the requirements.
3. The number, depth, position and size of stone holes and grooves should meet the design requirements. Corner joints should meet the design requirements and technical standards.
(II) General Project
1. The surface of the stone wall should be smooth and clean, free from pollution, defects and cracks. The color and pattern should be coordinated, no obvious color difference, no obvious repair marks.
2, stone seams should be horizontal and vertical, uniform width; yin and Yang angle slate pressure should be correct, the edge seam should be straight; uneven wall thickness should be consistent, the upper and lower mouth should be straight; stone panel hole, slot edge Should be anastomosed and the edges should be neat.
3. The allowable deviation of the installation of stone veneer panels shall comply with the requirements of Table 8.2.9 of the “Code for Quality Acceptance of Building Decoration Engineeringâ€:
Facade verticality: 2mm
Surface roughness: 2mm
Yin Yang Square Founder: 2mm
Seam straightness: 2mm
Wall skirts, straight legs with feet: 2mm
Joint height difference: 0.5mm
Seam width: 1mm
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