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Technical part
Project construction content: This project is the decoration project of the gate column of Hebi Intermediate People's Court. The contents of the project include: dismantling four original doorstones and aluminum-plastic decorative columns with D = 700 mm ... and making four new sesame white granite decorative columns with D = 940 mm. See the design drawings and bill of quantities for the specific scope.
I. Process flow
Demolition of the original hall stone and aluminum-plastic decorative columns → Check the structural dimensions → Clean the structural surface → Make a leveling layer → Pop up vertical lines on the structure → Hang two vertical steel wires at the big corner → Temporarily fix the upper wallboard → Drill holes and insert expansion bolts → Insert stainless steel fasteners → Insert the top wallboard → Hang horizontal position lines → Support the bottom bracket → Position the bottom plate → Adjust and temporarily fix it → Brush the second decorative plate covering agent → Drill holes in the structure.
Second, the main machine
Bench drill, toothless cutting saw, impact drill, pistol drill, tape measure, guiding rule, etc.
Third, the operation process
Receiving goods shall be managed by designated personnel. Carefully check whether the specifications and models of materials are correct and consistent with the bill of materials. If the color of the stone is obviously inconsistent, it should be packaged separately so as to be returned to the manufacturer. If there are cracks or missing corners, they should be repaired before use. In severe cases, they should not be used. Also pay attention to the compaction of stone materials in the stacking area, and pad 10cm* 10cm long square wood to make it more than 8cm above the ground. It's best to nail rubber strip on the square wood, so that the stones can lean against the special steel frame at 75, and each stone is separated by plastic film and compacted to prevent adhesion and inclination.
(2) Stone surface treatment: After the stone surface is fully dried (the water content should be less than 8%), use stone care agent to protect the stone hexahedron. This process must be carried out in a pollution-free environment. Put the stone flat on the wood square, dip it in the protective agent with a brush and spread it evenly on the stone surface. The coating must be in place. After the first coating, apply the stone protective agent for the second time in the same way every 24 hours, and use it after 48 hours.
(3) Stone preparation: firstly, the color of stone is selected and classified by colorimetry; The colors of the stones installed on the same side should be consistent, and according to the design size and drawing requirements, the special mold should be fixed on the bench drill to drill holes. In order to ensure the accurate and vertical position, a shaped stone bracket should be nailed and the slate should be placed on the bracket. The facet to be drilled is perpendicular to the drill bit, so that the hole is accurate after forming. The hole depth is 22-23mm, the aperture is 7-8mm, the drill bit is 5-6 mm, and then the unsaturated resin glue is brushed on the back of the stone, mainly using the method of one cloth and two glues. The cloth is alkali-free and untwisted 24-mesh glass fiber cloth. Before brushing the glue on the brush head, write the number on the slate, and remove the floating ash and impurities on the slate, such as saw rust and iron trowel, and then brush the glue with wire brush and roving. Glue should be used together to prevent waste after curing. Pay attention to the corners. In particular, the punched part is a weak area and must be brushed. Cover the cloth and put glue on your head. When laying glass fiber grid cloth, it should be scraped flat from one side with a brush, and then coated with glue twice. The brush can't get too much glue, so as to prevent it from flowing to the small surface of stone to bring difficulties and quality problems to caulking.
(4) Foundation preparation: clean the structural surface of facing stone and make a leveling layer. At the same time, hang straight, hang square, find rules, and pop up vertical and horizontal lines. According to the design drawings and actual needs, the position line and block line of installing stone will pop up.
(5) Hanging line: According to the requirements of design drawings, the vertical control lines on both sides of the large angle should be punched out by theodolite in advance before stone installation, preferably at a place 20cm away from the large angle, so as to check the accuracy of vertical hanging line at any time and ensure the smooth installation. It is best to use φ0. 1-φ0.2 steel wire for vertical crane, and the weight of the bottom sinker depends on the height. Generally, the weight of the sunk iron below 40m is 8- 1 okg, and the upper end is hung on a special angle steel frame and fixed at the top of the corner of the building with expansion bolts. Must be hung in a firm, accurate and inaccessible place, and pay attention to protection and regular inspection. And mark the top and bottom of the control line.
(6) Bracket for supporting the bottom decorative plate: press the pre-processed bracket on the bottom plate to be installed. Brackets should be firmly supported, connected with each other, or connected with shelves. After the bracket is installed, spread a plank with a thickness of 5Omm in the direction of the bracket, and the top of the plank should be on the same horizontal plane to ensure that the upper and lower sides of the stone are on the same horizontal plane.
(7) Punch holes in the retaining structure and lower the expansion bolts: play a horizontal line on the surface of the structure, accurately punch holes in the retaining structure wall according to the design drawings and stone drilling positions, mark them, and then punch holes by points. Percussion drill can be used for drilling, and φ 12.5 percussion drill bit can be used. When drilling, first use a pointed wooden fence to drill a point on the pre-drilled point, and then drill the hole to a depth of 60-02. Hole forming requirements should be perpendicular to the structural surface. After the hole is formed, take out the ash powder in the hole with a small hook spoon and place the expansion bolt. All expansion bolts required for this layer shall be installed in place.
(8) Connecting iron pieces: use stainless steel bolts specified in the design to fix angle steel and flat steel plate. Adjust the position of the flat steel plate so that the small hole of the flat steel plate is just aligned with the manhole of the slate, fix the flat steel plate and tighten it with a square wrench.
(9) Installation of the bottom stone: After installing the connecting iron pieces on the side, the corner pieces of the bottom panel can be installed in place. The method is to temporarily fix it with a fixture. First, glue the stone side hole, adjust the iron sheet, insert the fixed steel needle, and adjust the panel for fixation. Install the bottom plates in sequence. After all the bottom plates are in place, check whether the levels of the panels are in a line. If there are irregularities, adjust them. The low one can be leveled with a wooden wedge; The high one can gently and appropriately exit the wooden wedge until the top of the exit panel is on a horizontal line; Adjust the level and verticality of the panel first, and then check the joints. The joint width should be uniform according to the design requirements, the joint should be embedded with lining strips, and the sealing height should be higher than 25cm. Subsequently, the mortar made of 1:2.5 white cement was poured into the bottom plate with a height of 2Ocm, and a drainage pipe was set on the surface of the mortar.
(10) Wipe the hole on the slate. insert link steel needle: Pour the white cement epoxy resin of 1: 1.5 into the curing agent and accelerator, wipe the prepared glue into the manhole with a stick, and then insert the connecting steel needle with a length of Φ 4mm through the small hole on the flat plate until it reaches the hole on the panel. Before inserting the steel needle, check whether there are any scars and whether the length meets the requirements. draw point
(1 1) Adjustment and fixation: After the panel is temporarily fixed, adjust the levelness. If the opening on the panel is uneven, the corresponding double-stranded copper wire pad can be placed on the connecting flat steel plate with the lower opening at the bottom end of the panel. If the copper wire is thick, you can flatten it with a small hammer. If it is high, the lower opening at the other end can be filled with the above method. Adjust the verticality, and adjust the gap between the stainless steel connector at the top of the panel and the wall until the panel is vertical.
(12) Roof installation: In addition to the general stone installation requirements, after installation adjustment, a 2mm long wooden strip is hung in the gap between the structure and the slate, and the wooden strip is leveled to the top of the slate, with a downward direction of 25 mm.. The hanging point can be set on the connecting iron sheet, and the wooden strip can be hung with lead wire. After hanging the battens, put polystyrene board in the gap between the slate and the wall.
(13) Sticking anti-fouling strips and caulking: Sticking anti-fouling strips along the edge of the panel, the paper tape type self-adhesive tape of about 4cm should be selected, and the edges should be stuck together and adhered tightly. Elastic foam filler (rod) should be embedded in the gap between panels. Fillers (rods) can also be cut into strips with a width of 10mm with 8mm thick high-strength foam board, and the filler (rod) should be 5mm away from the decoration surface after embedding. If the rubber surface is not smooth, you can scrape it with a stainless steel spoon and wipe it clean when using it. When burying the bottom joint, be careful not to block the tap water pipe. According to the color of slate, a proper amount of mineral pigments can be added to the glue.
(Before the construction of 65438+ coating agent, it is necessary to master and understand the weather trend, and construction is not allowed in rainy days and windy days above Grade 4 to prevent pollution of the paint film; In winter and rainy season, it can be operated indoors with good shelter from the wind and brushed on the board. The topcoat should be prepared half an hour before painting according to the proportion. Pay attention to the difference between primer and topcoat, and it is best to operate in stages. The coating agent should be stirred evenly to prevent uneven film formation. Brush with a 3-inch wool brush to avoid sagging and brush back as little as possible to avoid brush marks, no bubbles and brush leakage. The brush should be smooth and shiny.
(15) We can also refer to the method of fixing the skeleton during the installation of metal decorative panels, and carry out the construction of dry-hanging technologies such as structural connection of granite decorative panels, especially the indoor dry-hanging decorative panels installation technology.
Fourth, quality standards.
1. Master project
(1) The variety, anti-corrosion, specification, shape, flatness, geometric size, smoothness, color and pattern of the facing stone board must meet the design requirements and obtain the product certificate.
(2) The surface layer and base should be installed firmly; Paste materials and dry-hanging accessories must meet the design requirements and the provisions of the current national standards, and carbon steel accessories need rust prevention and corrosion protection. The welding points should be treated with anti-corrosion.
(3) The quantity, specification, location, connection mode and anti-corrosion treatment of embedded parts (or post-embedded parts) and connectors of facing installation project must meet the design requirements. The current drawing strength of rear embedded parts must meet the design requirements. The decorative board must be installed firmly.
2. General items
(1) The surface is smooth and clean; Correct spelling, clear and smooth texture and uniform color; Non-whole board parts should be arranged properly, and the board at the corner of yin and yang should be pressed.
(2) The joints shall be uniform and smooth, and the caulking shall be dense and uniform in width, and there shall be no dislocation. (3) The plates around the protrusions should be cut in the whole board, with accurate dimensions and neat and smooth edges, and the dado and the face-sticking surface should be smooth and eye-catching.
(4) drip line is straight, the slope of running water is correct, clear and beautiful. Stone research institute tstone5A
Verb (abbreviation of verb) finished product protection
(1) Clean up the dirt, such as sealant, handprints, dust, water and other sundries left on door and window frames, glass and metal decorative plates in time, and stick a protective film to prevent pollution and corrosion.
(2) Seriously implement the reasonable construction sequence, and a few types of work should be done in the front to prevent the damage and pollution of the external stone facing.
(3) When disassembling and feeding, it is forbidden to collide with the dry-hung stone veneer.
(4) After the external facing is completed, the corner corner corner of the easily damaged part should be nailed, and other types of work should not scratch the finish paint or damage the stone.
(5) After outdoor painting, it is forbidden to leave residue and flip scaffolding before the finishing agent is completely dry.
(6) The completed external stone materials shall be supervised by designated personnel. If the finished product is found to be damaged, it should be stopped immediately and dealt with seriously.
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