CN118048989A - Anti-cracking construction method for assembled steel structure light inner wall plate - Google Patents
Anti-cracking construction method for assembled steel structure light inner wall plate Download PDFInfo
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- CN118048989A CN118048989A CN202410454172.XA CN202410454172A CN118048989A CN 118048989 A CN118048989 A CN 118048989A CN 202410454172 A CN202410454172 A CN 202410454172A CN 118048989 A CN118048989 A CN 118048989A
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- 239000004814 polyurethane Substances 0.000 claims abstract description 13
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- 239000012791 sliding layer Substances 0.000 claims abstract description 10
- 239000004793 Polystyrene Substances 0.000 claims abstract description 9
- 239000004088 foaming agent Substances 0.000 claims abstract description 9
- 229920002223 polystyrene Polymers 0.000 claims abstract description 9
- 229920002635 polyurethane Polymers 0.000 claims abstract description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000004570 mortar (masonry) Substances 0.000 claims description 16
- 239000011414 polymer cement Substances 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 12
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Abstract
The invention relates to an anti-cracking construction method for an assembled steel structure light inner wallboard, and belongs to the technical field of wallboard construction. The method comprises the steps of construction preparation, light inner wallboard installation and anti-cracking treatment; the anti-cracking treatment comprises sticking a plastic sliding cushion block in a U-shaped clamp at the lower end of the inter-plate joint; sticking an extruded polystyrene board at the position of the frame column corresponding to the wallboard; wallboard is installed from the upper layer to the lower layer and is arranged in the interlayer; grouting the gaps among the plates; the reserved gaps at the lower end and the upper end of the wallboard are filled with polyurethane foaming agent, and when no suspended ceiling exists, the L-shaped decorative reentrant corner is stuck to the beam bottom of the frame; sticking asphalt felt sliding layers on two sides of the wallboard within the thickness range of the ground; a gap is reserved between the bottom of the wallboard skirting board and the ground; and (3) adhering the L-shaped decorative internal corner to the frame column at the joint seam of the frame column and the wallboard. The invention solves the key technical problems of drying shrinkage cracks of the light inner wallboard, cracks caused by the difference of the matching deformation of the light inner wallboard and the steel structure, and the like, and meets the requirements of energy conservation and environmental protection.
Description
Technical Field
The invention relates to an anti-cracking construction method for an assembled steel structure light inner wallboard, and belongs to the technical field of wallboard construction.
Background
At present, the assembled steel structure design in China generally adopts a light inner wallboard, namely an aerated concrete wallboard, and the wallboard is widely popularized and applied in the assembled steel structure with the unique advantages of light weight, sound insulation, heat preservation, energy conservation, environmental protection, convenience in construction and the like. However, due to the large shrinkage rate of the wallboard, the large matching deformation difference of the wallboard and the steel structure leads to the common cracking of the wallboard body, the joint seams between the wallboard and the joint seams around the wallboard, the engineering quality is seriously affected, and a large amount of repair of the wallboard is caused. In order to solve the problem of wallboard cracks, after measures such as steel frame assembly type wallboard which is about 4 times higher in manufacturing cost than an aerated concrete wallboard are adopted, the problem of complex joint connection joints between boards exists, the comprehensive cost is increased by more than 2 times compared with the construction cost of the aerated concrete wallboard, and the joint joints between boards and the joint joints around still crack.
Chinese patent CN102505842a discloses an anti-cracking wall and a construction method thereof. The weather-proof silicone sealant or flexible epoxy resin is smeared on the joint surface of the wallboard to be used as an inter-board joint anti-cracking measure. The price of the two materials is about 10 ten thousand yuan per ton, and the high-cost materials are adopted as the adhesive for the plate gaps with larger filling amount, so that the practicability is not realized. In addition, the mode of embedding clamping piece that an organic whole was connected at wallboard top or bottom also has the drawback, because of the wallboard about with the structure node do not set up flexible strain gap, under wallboard and steel construction deformation difference effect, the potential cause wallboard fracture.
Chinese patent CN115199052a discloses a method for fixedly mounting and constructing an anti-cracking ALC wallboard. In the seven anti-cracking treatment, PE rods are embedded and installed in gaps on two sides of the ALC wallboard, then PU foaming glue is filled in the gaps, namely, the PU foaming glue is only filled outside the filled PE rods, and gaps between inner plates of the PE rods are cavities. Because the PU foaming adhesive has lower strength and the bonding surface of the PU foaming adhesive is small, the residual shrinkage stress of the wallboard cannot be resisted, and the foaming adhesive is separated from the side surface of the wallboard to crack; and filling alkali-resistant grid cloth in the top gap of the ALC wallboard, and then filling and plastering by using anti-crack mortar to finish the fixed installation of the ALC wallboard. The wallboard of this patent about with the structure node do not set up flexible strain gap equally, under wallboard and steel construction deformation difference effect, also tend to lead to the wallboard fracture.
In summary, the problem of cracking of the fabricated steel-structured light wall panel has become a national quality common problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an anti-cracking construction method for an assembled steel structure light inner wallboard, which solves the problems of quality common problems of cracks caused by the matching deformation difference of the light inner wallboard and the steel structure and the shrinkage of the wallboard, improves the assembly degree and reduces the construction comprehensive cost.
Compared with the traditional technology, the invention solves the key technical problems as follows:
(1) After the light inner wall board is controlled to be out of the kettle, natural ventilation and rainproof maintenance are carried out for 28 days, when the water content is less than or equal to 30%, the light inner wall board can be installed, and the drying shrinkage rate of 70% is finished before the installation of the light inner wall board, so that the volume of the light inner wall board tends to be stable, and the technical problem that the light inner wall board body and the combination seam are severely cracked due to the drying shrinkage after the installation of the light inner wall board is solved;
(2) A plastic sliding cushion block is stuck in the U-shaped clamp at the lower end of the inter-plate joint, so that the technical problem of cracking of the combined joint of the light inner wall plate caused by the fact that residual shrinkage stress cannot be released after the light inner wall plate is installed is solved;
(3) Sticking an extruded polystyrene board at the position of the frame column corresponding to the light inner wallboard, filling reserved gaps at the lower end and the upper end of the light inner wallboard with a polyurethane foaming agent, and solving the technical problem that the wallboard is cracked due to the matching deformation difference of the steel structure and the light inner wallboard;
(4) The light inner wallboard is arranged from the upper layer to the lower layer and is separated from the upper layer, so that the technical problem that the frame beam is deformed under the load action of the light inner wallboard, and the compression stress is generated on the lower light inner wallboard is solved;
(5) Injecting polymer cement from the lower end of the inter-plate joint by a grouting machine until the cement is fully discharged from the exhaust holes at the upper end of the inter-plate joint, thereby solving the technical problem of cracking caused by weak slurry throwing and bonding of the traditional inter-plate joint;
(6) The method comprises the steps that a light inner wallboard groove is tightly stuck by adopting polymer cement and an anti-cracking alkali-resistant glass fiber net 3 days before the thin plastering construction of the light inner wallboard, so that the residual shrinkage stress of the light inner wallboard is fully released, and the technical problem that cracking cannot be remedied after the groove of the light inner wallboard is caulked is solved;
(7) The asphalt felt sliding layers are stuck on the two sides of the light inner wallboard within the thickness range of the ground, and a gap of 2 mm-3 mm is reserved between the bottom of the skirting board of the light inner wallboard and the ground, so that the technical problems of the release of wet expansion and dry shrinkage alternate deformation stress and residual shrinkage stress of the light inner wallboard are solved;
(8) And L-shaped decorative internal corners are respectively stuck to the bottoms of the frame columns and the frame beams at the joint seams of the vertical and horizontal light inner wall plates, so that the technical problem that visible cracks occur at the nodes around the light inner wall plates is solved.
The anti-cracking construction method of the assembled steel structure light inner wallboard comprises the following steps of:
1. Preparation for construction
Light internal wallboard typesetting
1) Determining typesetting horizontal dimensions
Reserving mounting gaps according to the clear distance between the decorated frame columns, and determining typesetting horizontal dimensions;
2) Determining vertical dimensions of typesetting
Reserving a mounting gap according to the net height of the floor structure, and determining the typesetting vertical dimension;
3) Determining the size of door and window openings
Reserving a mounting gap according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of a door and window opening;
4) Drawing a plane view and an elevation view of a light inner wallboard
Drawing a plane view and an elevation view of the light inner wallboard according to the typesetting horizontal dimension, the typesetting vertical dimension and the door and window opening dimension;
(II) lightweight interior wallboard selection
Selecting a light inner wallboard in sealed connection with a vertical slot and a tongue-and-groove;
And (III) storing and curing the light inner wall board
2. Light inner wallboard installation
According to the plan view and the elevation view of the light inner wall plate, the elastic wires at the upper end and the lower end of the light inner wall plate are used for positioning the side wires, the U-shaped clamping contour wires and the control wires of the light inner wall plate;
secondly, fixing the U-shaped clamp at the bottom of the frame beam by spot welding at the upper end of the inter-plate seam of the light inner wallboard; the U-shaped clamp is fixed on the floor slab by adopting an anchor bolt at the lower end of the inter-plate gap of the light inner wallboard; the upper end and the lower end of each inter-plate seam are respectively provided with a U-shaped card;
thirdly, adopting mounting equipment to right the light inner wallboard, inserting the light inner wallboard into the U-shaped clamp, and compressing the joint sealing strips of the joint between the boards tightly;
3. Anti-cracking treatment
Firstly, sticking a plastic sliding cushion block with a reserved gap thickness in a U-shaped clamp at the lower end of a gap between plates; sticking an extruded polystyrene board with a reserved gap thickness at the position of the frame column corresponding to the light inner wallboard;
Secondly, installing a light inner wallboard from the upper layer to the lower layer and forming an interlayer;
Thirdly, after the installation and verification of the light inner wall plate are qualified, injecting polymer cement from the lower end of the inter-plate joint to the exhaust holes at the upper end of the inter-plate joint by adopting a grouting machine until the cement is fully discharged, wherein the grouting sequence is symmetrically performed from the center of the light inner wall plate to the two ends, and the accumulated grouting deviation of the light inner wall plate is prevented;
Fourthly, reserving gaps at the lower end and the upper end of the light inner wallboard to be filled with polyurethane foaming agent, and pasting an L-shaped decorative internal corner at the bottom of a frame beam when no suspended ceiling exists;
fifthly, after grouting the gaps between the plates to reach the strength, installing the electric pipeline, and after the electric pipeline is installed and the electric pipeline is wetted and cut into grooves, filling and pasting an anti-cracking alkali-resistant glass fiber net by adopting polymer cement;
when the distribution box is installed on the light inner wall plate, reserving an empty baffle plate on the light inner wall plate, and pouring the empty baffle plate by adopting light concrete after the distribution box is installed and the circuit is arranged;
(seventh) pasting an anti-cracking alkali-resistant glass fiber net in the groove of the light inner wall plate 3 days before plastering the light inner wall plate, and trowelling and compacting by adopting polymer cement;
eighth, pasting asphalt felt sliding layers on two sides of the light inner wallboard in the thickness range of the ground;
a gap is reserved between the bottom of the light inner wallboard skirting board and the ground, and residual mortar in the gap is cleaned;
(ten) thin plastering of the light inner wallboard;
And (eleven) after the light inner wall board is plastered to reach the strength, the L-shaped decorative internal corner is stuck on the frame column at the joint seam of the frame column and the light inner wall board.
Wherein:
in the first step of serial number (I), reserving mounting gaps of 30-40 mm according to the clear distance between decorated frame columns, and determining typesetting horizontal dimensions; reserving a mounting gap of 40-60 mm according to the net height of the floor structure, and determining the vertical typesetting size; and reserving 15-20 mm mounting gaps according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of the door and window opening.
In the step one, in the step (III), the light inner wallboard is maintained for 28 days under the conditions of natural ventilation and rain prevention, and the water content of the light inner wallboard is less than or equal to 30%.
In the second step, the U-shaped card is formed by stamping a hot dip galvanized steel sheet with the thickness of 4 mm-5 mm, the length of 160 mm-180 mm and the height of 60 mm-80 mm.
And in the second serial number (II), an M10-M12 anchor bolt is adopted to fix the U-shaped clamp on the floor slab.
And in the step two, in the sequence number (III), the light inner wallboard is righted by adopting mounting equipment and lifted to 20-30 mm away from the surface of the floor slab, and then the light inner wallboard is inserted into the U-shaped clamp.
In the step III, the depth of the electric pipeline cutting groove is less than or equal to 1/3 of the thickness of the light inner wall plate, and the horizontal length of the electric pipeline cutting groove is less than or equal to 1/3 of the width of the light inner wall plate.
In the step III, a gap of 2 mm-3 mm is reserved between the bottom of the light inner wallboard skirting board and the ground.
In the step three serial number (ten), the light-weight inner wallboard plastering comprises the following steps of:
1) Base layer treatment
After the light inner wall board is installed for 14 days, the light inner wall board is plastered, a high-pressure sprayer is adopted to flush and moisten the light inner wall board from top to bottom before the light inner wall board is plastered, the wall surface of the light inner wall board is uniformly seeped to a depth of 10 mm-15 mm, and the surface of the light inner wall board is moist and has no clear water during the plastering;
2) Thin plastering
① Preparing bonding layer paste, and stirring to uniformity;
② Preparing anti-cracking mortar, and stirring until the anti-cracking mortar is uniform;
③ Wetting a light inner wall plate by adopting a sprayer, sticking a cake, punching ribs, aligning, cleaning slurry along with scraping a bonding layer, scraping anti-cracking mortar along with scraping the bonding layer, and scraping the bonding layer to a thickness of 5-10 mm;
④ After the aluminum alloy scraping bar is adopted for scraping, rubbing and fine leveling, the bonding layer with the thickness of 1 mm-1.5 mm is scraped and smeared evenly, and a wood trowel is adopted for napping and leveling, and a plastic trowel is adopted for finishing pressing Mao Guang before initial setting.
The weight ratio of the bonding layer clean slurry is glue-free gypsum powder, water=1:3, and the weight ratio of the anti-cracking mortar is glue-free gypsum powder, medium sand=1:2.
In the invention, the following components are added:
in the first step of serial number (I), drawing a plane view and an elevation view of the light inner wallboard according to the typesetting horizontal dimension, the typesetting vertical dimension and the door and window opening dimension so as to accurately process and install the light inner wallboard.
In the step one serial number (two) and the step one serial number (three), the following points should be noted:
1) The light inner wallboard with smaller drying shrinkage value and higher compressive strength and the vertical slot mortises and sealing connection is selected;
2) Before entering the light inner wall board, the stacking condition after the kettle is researched, so that the light inner wall board is ensured to be stacked on a ventilated, dried and rainproof field;
3) Randomly sampling the light inner wallboard after entering the field, visually inspecting the mortises and the sealing strips to ensure that the mortises and the sealing strips are intact, and detecting the compressive strength and the drying shrinkage value to meet the requirements and then using the light inner wallboard.
In the step one, in the serial number (III), after the light inner wall board is taken out of the kettle, curing is carried out for 28 days under the conditions of natural ventilation and rain prevention, and the light inner wall board can be installed when the water content is less than or equal to 30%, so that most of hydration heat shrinkage and drying shrinkage of the light inner wall board are finished in the curing process, and the technical problem that the light inner wall board body and the combination seam are seriously cracked after engineering delivery and use can be solved.
In the step one, in the serial number (III), besides the light inner wall board is required to be maintained for 28d under the conditions of natural ventilation and rain prevention, the water content of the light inner wall board is ensured to be less than or equal to 30 percent, and the following points are also required to be paid attention to the storage and maintenance of the light inner wall board:
1) After entering the light inner wall plate, the light inner wall plate is respectively stacked according to the production date, specification and grade, an air duct is formed by vertically and vertically sizing the 1/3 long positions of the two ends of the light inner wall plate, and drainage and rainproof measures are taken, so that the light inner wall plate is strictly forbidden to rain and soak.
2) If the field is narrow and narrow, the main body structure can be piled up on the floor for natural ventilation maintenance according to the method, and the load of piled up light inner wall boards per square meter is smaller than or equal to the sum of the constant load of the floor construction layer and the standard value of the allowable live load of the floor.
In the third serial number (I), a plastic sliding cushion block with a reserved gap thickness is stuck in a U-shaped clamp at the lower end of the inter-plate gap, so that the residual shrinkage stress of the light inner wallboard can be released, and the cracking of the light inner wallboard is eliminated; the extruded polystyrene board with the reserved gap thickness is stuck at the position of the frame column corresponding to the light inner wall board, so that horizontal deformation stress generated by the deformation difference of the assembled steel structure and the light inner wall board can be absorbed, and the cracking of the light inner wall board is eliminated.
In the third serial number (II), the light inner wallboard is installed from the upper layer to the lower layer and is installed in an interlayer mode, so that the frame beam is installed on the lower layer after being deformed under the load action of the light inner wallboard, and compression stress generated by the lower layer light inner wallboard due to the deformation of the frame beam can be prevented.
In the step III, the grouting machine is adopted to inject the polymer mucilage from the lower end of the inter-plate seam until the exhaust holes at the upper end of the inter-plate seam fully discharge the mucilage, so that the problem of crack of the inter-plate seam caused by unstable manual slurry throwing and bonding and plump mucilage of the traditional inter-plate seam can be solved.
In the step III, the reserved gaps at the lower end and the upper end of the light inner wallboard are filled with polyurethane foaming agent, so that the vertical and horizontal strain requirements of the assembled steel structure can be met, and the cracking of the light inner wallboard is prevented.
In the third step serial number (seventh), the polymer cement and the anti-cracking alkali-resistant glass fiber net are adopted to tightly adhere the grooves of the light inner wall plate 3 days before the thin plastering construction of the light inner wall plate, so as to fully release the residual shrinkage stress of the light inner wall plate and eliminate cracks after the grooves are filled.
In the third step sequence number (eighth), felt sliding layers are adhered to two sides of the light inner wall board within the thickness range of the ground, so that the light inner wall board can be prevented from absorbing ground moisture and generating wet expansion and dry shrinkage alternate deformation, residual shrinkage stress of the light inner wall board is released through the felt sliding layers, and cracks of gaps or the light inner wall board are prevented.
In the step III, a gap of 2 mm-3 mm is reserved between the bottom of the skirting board of the light inner wall board and the ground, so that the light inner wall board is separated from the ground, and the problem that the light inner wall board cracks due to the fact that the skirting board and the ground are adhered to influence the release of residual shrinkage stress of the light inner wall board is solved.
In the step III serial number (eleven) and the step III serial number (fourth), L-shaped decorative internal corners are respectively stuck to the frame columns and the frame beam bottoms at the joint seams of the light inner wall plates vertically and horizontally, so that visible cracks of the light inner wall plates and structural joints are solved.
Compared with the prior art, the invention has the following beneficial effects:
(1) After the light inner wall board is controlled to be out of the kettle, natural ventilation and rainproof maintenance are carried out for 28 days, when the water content is less than or equal to 30%, the light inner wall board can be installed, and the drying shrinkage rate of 70% is finished before the installation of the light inner wall board, so that the volume of the light inner wall board tends to be stable, and the technical problem that the light inner wall board body and the combination joint are severely cracked due to drying shrinkage after the installation of the light inner wall board is solved;
(2) A plastic sliding cushion block is stuck in the U-shaped clamp at the lower end of the inter-plate joint, so that the technical problem of cracking of the combined joint of the light inner wall plate caused by the fact that residual shrinkage stress cannot be released after the light inner wall plate is installed is solved;
(3) Sticking an extruded polystyrene board at the position of the frame column corresponding to the light inner wallboard, filling reserved gaps at the lower end and the upper end of the light inner wallboard with a polyurethane foaming agent, and solving the technical problem that the wallboard is cracked due to the matching deformation difference of the steel structure and the light inner wallboard;
(4) The light inner wallboard is arranged from the upper layer to the lower layer and is separated from the upper layer, so that the technical problem that the frame beam is deformed under the load action of the light inner wallboard, and the compression stress is generated on the lower light inner wallboard is solved;
(5) Injecting polymer cement from the lower end of the inter-plate joint by a grouting machine until the cement is fully discharged from the exhaust holes at the upper end of the inter-plate joint, thereby solving the technical problem of cracking caused by weak slurry throwing and bonding of the traditional inter-plate joint;
(6) The method comprises the steps that a light inner wallboard groove is tightly stuck by adopting polymer cement and an anti-cracking alkali-resistant glass fiber net 3 days before the thin plastering construction of the light inner wallboard, so that the residual shrinkage stress of the light inner wallboard is fully released, and the technical problem that cracking cannot be remedied after the groove of the light inner wallboard is caulked is solved;
(7) The asphalt felt sliding layers are stuck on the two sides of the light inner wallboard within the thickness range of the ground, and a gap of 2 mm-3 mm is reserved between the bottom of the skirting board of the light inner wallboard and the ground, so that the technical problems of the release of wet expansion and dry shrinkage alternate deformation stress and residual shrinkage stress of the light inner wallboard are solved;
(8) And L-shaped decorative internal corners are respectively stuck to the bottoms of the frame columns and the frame beams at the joint seams of the vertical and horizontal light inner wall plates, so that the technical problem that visible cracks occur at the nodes around the light inner wall plates is solved.
In conclusion, the wallboard crack system pre-control system mainly comprises a release-based and anti-release-compatible wallboard crack system, solves the key technical problems of cracks and the like caused by the difference of the drying shrinkage cracks of the light inner wallboard and the matched deformation of the steel structure, improves the assembly degree, reduces the comprehensive construction cost by 1/2, meets the energy-saving and environment-friendly requirements, and has general popularization and application values and remarkable social and economic benefits.
Drawings
FIG. 1 is a schematic view of a lightweight interior wallboard installation in accordance with the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a section B-B of FIG. 1;
fig. 4 is an enlarged view of a portion C in fig. 2;
In the figure: 1. a lightweight inner wallboard; 2. a U-shaped card; 3. a plastic sliding cushion block; 4. an anchor bolt; 5. a floor slab; 6. a polyurethane foaming agent; 7. ground surface; 8. a linoleum slip layer; 9. skirting board; 10. a sealing strip; 11. a groove; 12. a frame beam; 13. a frame column; 14. extruding polystyrene board; 15. l-shaped decorative internal corners; 16. a tongue and groove; 17. and (5) a gap between the plates.
Detailed Description
The present invention is specifically described and illustrated below with reference to examples.
Example 1
As shown in fig. 1, 2,3 and 4, the anti-cracking construction method for the assembled steel structure light inner wallboard in the embodiment specifically comprises the following steps:
1. Preparation for construction
Light inner wall board 1 typesetting
1) Determining typesetting horizontal dimensions
Reserving mounting gaps according to the clear distance between the decorated frame columns 13, and determining typesetting horizontal dimensions;
2) Determining vertical dimensions of typesetting
Reserving a mounting gap according to the net height of the floor structure, and determining the typesetting vertical dimension;
3) Determining the size of door and window openings
Reserving a mounting gap according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of a door and window opening;
4) Drawing a plane view and an elevation view of a light inner wall plate 1
Drawing a plane view and an elevation view of the light inner wallboard 1 according to the typesetting horizontal dimension, the typesetting vertical dimension and the door and window opening dimension;
(II) light interior wallboard 1 selection
Selecting a light inner wallboard 1 with a vertical slot and a mortise 16 in sealing connection;
And (III) storing and curing the light inner wall board 1
2. Light inner wall board 1 installation
According to the plan view and the elevation view of the light inner wall plate 1, the elastic wires at the upper end and the lower end of the light inner wall plate 1 are used for positioning the side wires of the light inner wall plate 1, the outline wires of the U-shaped clamp 2 and the control wires;
secondly, fixing the U-shaped clamp 2 at the bottom of the frame beam 12 by spot welding at the upper end of the plate gap 17 of the light inner wallboard 1; the U-shaped clamp 2 is fixed on the floor 5 by adopting an anchor bolt 4 at the lower end of an inter-plate gap 17 of the light inner wall plate 1; the upper end and the lower end of each plate gap 17 are respectively provided with a U-shaped card 2;
Thirdly, centralizing the light inner wallboard 1 by adopting mounting equipment, inserting the light inner wallboard 1 into the U-shaped clamp 2, and tightly compressing the joint sealing strips 10 of the inter-board joints 17;
3. Anti-cracking treatment
Firstly, sticking a plastic sliding cushion block 3 with a reserved gap thickness in a U-shaped card 2 at the lower end of a plate gap 17; sticking an extruded polystyrene board 14 with a reserved gap thickness at the position of the frame column 13 corresponding to the light inner wallboard 1;
secondly, installing a light inner wallboard 1 from the upper layer to the lower layer and forming a partition layer;
Thirdly, after the installation and verification of the light inner wall plate 1 are qualified, injecting polymer cement from the lower end of the plate gap 17 to the exhaust holes at the upper end of the plate gap 17 by a grouting machine until the cement is fully discharged, wherein the grouting sequence is symmetrically performed from the center to the two ends of the light inner wall plate 1, and the accumulated grouting deviation of the light inner wall plate 1 is prevented;
Fourthly, the reserved gaps at the lower end and the upper end of the light inner wallboard 1 are filled with polyurethane foaming agent 6, and when no suspended ceiling exists, an L-shaped decorative internal corner 15 is stuck to the bottom of the frame beam 12;
fifthly, after grouting the inter-plate gaps 17 to reach the strength, installing the electric pipeline, and after the electric pipeline is installed and the electric pipeline is wetted and cut into grooves, filling and pasting an anti-cracking alkali-resistant glass fiber net by adopting polymer cement;
when the distribution box is installed on the light inner wall plate 1, reserving an empty baffle plate for the light inner wall plate 1, and pouring the empty baffle plate by adopting light concrete after the distribution box is installed and the circuit is arranged;
(seven) pasting an anti-cracking alkali-resistant glass fiber net in the groove 11 of the light inner wall plate 13 days before the light inner wall plate 1 is plastered, and trowelling and compacting by adopting polymer cement;
eighth, pasting asphalt felt sliding layers 8 on two sides of the light inner wallboard 1 within the thickness range of the ground 7;
a gap is reserved between the bottom of the skirting board 9 of the light inner wallboard 1 and the ground 7, and residual mortar in the gap is cleaned;
(ten) thin plastering the light inner wallboard 1;
and (eleven) after the light inner wall plate 1 is plastered to reach the strength, the L-shaped decorative internal corner 15 is stuck on the frame column 13 at the joint seam of the frame column 13 and the light inner wall plate 1.
In the first step of serial number (I), a mounting gap of 30 mm-40 mm is reserved according to the clear distance between decorated frame columns 13, and then the typesetting horizontal size is determined; reserving a mounting gap of 40-60 mm according to the net height of the floor structure, and determining the vertical typesetting size; and reserving 15-20 mm mounting gaps according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of the door and window opening.
In the step one, in the serial number (III), the light inner wallboard 1 is maintained for 28 days under the conditions of natural ventilation and rain prevention, and the water content of the light inner wallboard 1 is less than or equal to 30%.
In the second step, the U-shaped card 2 is formed by stamping a hot dip galvanized steel sheet with the thickness of 4 mm-5 mm, the length of 160 mm-180 mm and the height of 60 mm-80 mm.
In the second serial number (II), the U-shaped clamp 2 is fixed on the floor 5 by adopting an anchor bolt 4 from M10 to M12.
In the second serial number (III), the light inner wallboard 1 is righted by adopting installation equipment and lifted to 20-30 mm away from the surface of the floor 5, and then the light inner wallboard 1 is inserted into the U-shaped clamp 2.
In the step III, the depth of the electric pipeline cutting groove is less than or equal to 1/3 of the thickness of the light inner wall plate 1, and the horizontal length of the electric pipeline cutting groove is less than or equal to 1/3 of the width of the light inner wall plate 1.
In the step III, a gap of 2 mm-3 mm is reserved between the bottom of the skirting board 9 of the light inner wallboard 1 and the ground 7.
In the step three serial number (ten), the light inner wallboard 1 plastering method comprises the following steps:
1) Base layer treatment
After the light inner wall board 1 is installed for 14 days, the light inner wall board 1 is plastered, the light inner wall board 1 is evenly washed and wetted for two times from top to bottom by adopting a high-pressure sprayer before the light inner wall board 1 is plastered, the wall surface of the light inner wall board 1 is enabled to evenly permeate water to a depth of 10 mm-15 mm, and the surface of the light inner wall board 1 is moist and free of clear water during the thin plastering;
2) Thin plastering
① Preparing bonding layer paste, and stirring to uniformity;
② Preparing anti-cracking mortar, and stirring until the anti-cracking mortar is uniform;
③ Wetting the light inner wallboard 1 by adopting a sprayer, sticking cakes, punching ribs, aligning, cleaning slurry along with scraping the bonding layer, scraping anti-cracking mortar along with scraping the bonding layer, and scraping the bonding layer to a thickness of 5-10 mm;
④ After the aluminum alloy scraping bar is adopted for scraping, rubbing and fine leveling, the bonding layer with the thickness of 1 mm-1.5 mm is scraped and smeared evenly, and a wood trowel is adopted for napping and leveling, and a plastic trowel is adopted for finishing pressing Mao Guang before initial setting.
The weight ratio of the bonding layer clean slurry is glue-free gypsum powder, water=1:3, and the weight ratio of the anti-cracking mortar is glue-free gypsum powder, medium sand=1:2.
In the first step of serial number (I), drawing a plan view and an elevation view of the light inner wallboard 1 according to the typesetting horizontal dimension, the typesetting vertical dimension and the door and window opening dimension so as to accurately process and install the light inner wallboard 1.
In the step one serial number (two) and the step one serial number (three), the following points should be noted:
1) The light inner wallboard 1 with smaller drying shrinkage value and higher compressive strength and sealed connection of the vertical slot and the tongue-and-groove is selected;
2) Before the light inner wall plate 1 enters the field, the stacking condition after the kettle is researched, so that the light inner wall plate 1 is ensured to be stacked on a ventilated, dried and rainproof field;
3) The light inner wallboard 1 is randomly sampled after entering the field, the mortises 16 and the sealing strips 10 are intact by visual inspection, and the rear part can be used after the detection of the compressive strength and the drying shrinkage value meets the requirements.
In the step one, in the serial number (III), after the light inner wallboard 1 is taken out of the kettle, curing is carried out for 28 days under the conditions of natural ventilation and rain prevention, and the water content is less than or equal to 30 percent, so that the light inner wallboard 1 can finish most of hydration heat shrinkage and drying shrinkage in the curing process, and the technical problem that the body and the combination seam of the light inner wallboard 1 are severely cracked after engineering delivery and use can be solved.
In the step one, the serial number (III), except that the light inner wall board 1 needs to be maintained for 28d under the natural ventilation and rainproof condition, the water content of the light inner wall board 1 is ensured to be less than or equal to 30%, and the following points are needed to be noted for storing and maintaining the light inner wall board 1:
1) After entering the light inner wall board 1, stacking according to the production date, specification and grade respectively, forming ventilation channels by vertical skids at the 1/3 board length position at the two ends of the light inner wall board 1, and taking water draining and rain preventing measures, and strictly forbidding the light inner wall board 1 to rain and soak.
2) If the field is narrow and narrow, the main body structure can be piled up on the floor for natural ventilation maintenance according to the method, and the load of piled up light inner wall boards 1 per square meter is smaller than or equal to the sum of the constant load of the floor construction layer and the standard value of the allowable live load of the floor.
In the step three serial number (I), a plastic sliding cushion block 3 with a reserved gap thickness is stuck in a U-shaped clamp 2 at the lower end of a plate gap 17, and the residual shrinkage stress of the light inner wallboard 1 can be released, so that the cracking of the light inner wallboard 1 is eliminated; the extruded polystyrene board 14 with the reserved gap thickness is stuck at the position of the frame column 13 corresponding to the light inner wall board 1, so that horizontal deformation stress generated by the deformation difference of the assembled steel structure and the light inner wall board 1 can be absorbed, and the cracking of the light inner wall board 1 is eliminated.
In the step three serial number (II), the light inner wallboard 1 is installed from the upper layer to the lower layer and is separated from the upper layer, so that the lower layer light inner wallboard 1 is installed after the frame beam 12 is deformed under the load action of the light inner wallboard 1, and the compression stress of the lower layer light inner wallboard 1 caused by the deformation of the frame beam 12 can be prevented.
In the step III, the polymer mucilage is injected from the lower end of the inter-plate slit 17 by a grouting machine until the exhaust holes at the upper end of the inter-plate slit 17 fully discharge the mucilage, so that the problem that the inter-plate slit 17 cracks due to the fact that the manual slurry throwing and bonding of the traditional inter-plate slit 17 is unstable and the mucilage is not full can be solved.
In the step III, the reserved gaps at the lower end and the upper end of the light inner wallboard 1 are filled with the polyurethane foaming agent 6, so that the vertical and horizontal strain requirements of the assembled steel structure can be met, and the cracking of the light inner wallboard 1 is prevented.
In the third step (seventh), the grooves 11 of the light inner wall board 1 are tightly adhered by adopting polymer cement and anti-cracking alkali-resistant glass fiber net 3 days before the thin plastering construction of the light inner wall board 1, so as to fully release the residual shrinkage stress of the light inner wall board 1 and eliminate the cracks after the grooves 11 are filled.
In the third step (eight), the linoleum sliding layers 8 are adhered to the two sides of the light inner wall board 1 within the thickness range of the ground 7, so as to prevent the light inner wall board 1 from absorbing the ground moisture and generating wet expansion and dry shrinkage alternate deformation, and the residual shrinkage stress of the light inner wall board 1 is released through the linoleum sliding layers 8, so that the gap or the cracking of the light inner wall board 1 is prevented.
In the step III, a gap of 2 mm-3 mm is reserved between the bottom of the skirting board 9 of the light inner wall board 1 and the ground 7, so that the light inner wall board 1 is separated from the ground 7, and the problem that the light inner wall board 1 cracks due to the fact that the residual shrinkage stress of the light inner wall board 1 is released due to the adhesion of the skirting board 9 and the ground 7 is solved.
In the step III (eleven) and the step III (fourth), L-shaped decorative internal corners 15 are respectively stuck to the bottoms of the frame columns 13 and the frame beams 12 at the joint seams of the light inner wall plate 1 vertically and horizontally, so that visible cracks of the light inner wall plate 1 and structural joints are solved.
Claims (10)
1. The anti-cracking construction method of the assembled steel structure light inner wallboard is characterized by comprising the following steps of:
1. Preparation for construction
Light internal wallboard typesetting
1) Determining typesetting horizontal dimensions
Reserving mounting gaps according to the clear distance between the decorated frame columns, and determining typesetting horizontal dimensions;
2) Determining vertical dimensions of typesetting
Reserving a mounting gap according to the net height of the floor structure, and determining the typesetting vertical dimension;
3) Determining the size of door and window openings
Reserving a mounting gap according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of a door and window opening;
4) Drawing a plane view and an elevation view of a light inner wallboard
Drawing a plane view and an elevation view of the light inner wallboard according to the typesetting horizontal dimension, the typesetting vertical dimension and the door and window opening dimension;
(II) lightweight interior wallboard selection
Selecting a light inner wallboard in sealed connection with a vertical slot and a tongue-and-groove;
And (III) storing and curing the light inner wall board
2. Light inner wallboard installation
According to the plan view and the elevation view of the light inner wall plate, the elastic wires at the upper end and the lower end of the light inner wall plate are used for positioning the side wires, the U-shaped clamping contour wires and the control wires of the light inner wall plate;
secondly, fixing the U-shaped clamp at the bottom of the frame beam by spot welding at the upper end of the inter-plate seam of the light inner wallboard; the U-shaped clamp is fixed on the floor slab by adopting an anchor bolt at the lower end of the inter-plate gap of the light inner wallboard; the upper end and the lower end of each inter-plate seam are respectively provided with a U-shaped card;
thirdly, adopting mounting equipment to right the light inner wallboard, inserting the light inner wallboard into the U-shaped clamp, and compressing the joint sealing strips of the joint between the boards tightly;
3. Anti-cracking treatment
Firstly, sticking a plastic sliding cushion block with a reserved gap thickness in a U-shaped clamp at the lower end of a gap between plates; sticking an extruded polystyrene board with a reserved gap thickness at the position of the frame column corresponding to the light inner wallboard;
Secondly, installing a light inner wallboard from the upper layer to the lower layer and forming an interlayer;
Thirdly, after the installation and verification of the light inner wall plate are qualified, injecting polymer cement from the lower end of the inter-plate joint to the exhaust holes at the upper end of the inter-plate joint by adopting a grouting machine until the cement is fully discharged, wherein the grouting sequence is symmetrically performed from the center of the light inner wall plate to the two ends, and the accumulated grouting deviation of the light inner wall plate is prevented;
Fourthly, reserving gaps at the lower end and the upper end of the light inner wallboard to be filled with polyurethane foaming agent, and pasting an L-shaped decorative internal corner at the bottom of a frame beam when no suspended ceiling exists;
fifthly, after grouting the gaps between the plates to reach the strength, installing the electric pipeline, and after the electric pipeline is installed and the electric pipeline is wetted and cut into grooves, filling and pasting an anti-cracking alkali-resistant glass fiber net by adopting polymer cement;
when the distribution box is installed on the light inner wall plate, reserving an empty baffle plate on the light inner wall plate, and pouring the empty baffle plate by adopting light concrete after the distribution box is installed and the circuit is arranged;
(seventh) pasting an anti-cracking alkali-resistant glass fiber net in the groove of the light inner wall plate 3 days before plastering the light inner wall plate, and trowelling and compacting by adopting polymer cement;
eighth, pasting asphalt felt sliding layers on two sides of the light inner wallboard in the thickness range of the ground;
a gap is reserved between the bottom of the light inner wallboard skirting board and the ground, and residual mortar in the gap is cleaned;
(ten) thin plastering of the light inner wallboard;
And (eleven) after the light inner wall board is plastered to reach the strength, the L-shaped decorative internal corner is stuck on the frame column at the joint seam of the frame column and the light inner wall board.
2. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the first step of serial number (I), reserving mounting gaps of 30-40 mm according to the clear distance between decorated frame columns, and determining typesetting horizontal dimensions; reserving a mounting gap of 40-60 mm according to the net height of the floor structure, and determining the vertical typesetting size; and reserving 15-20 mm mounting gaps according to the periphery of the peripheral dimension of the door and window frame, and determining the dimension of the door and window opening.
3. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the step one, in the step (III), the light inner wallboard is maintained for 28 days under the conditions of natural ventilation and rain prevention, and the water content of the light inner wallboard is less than or equal to 30%.
4. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the second step, the U-shaped card is formed by stamping a hot dip galvanized steel sheet with the thickness of 4 mm-5 mm, the length of 160 mm-180 mm and the height of 60 mm-80 mm.
5. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: and in the second serial number (II), an M10-M12 anchor bolt is adopted to fix the U-shaped clamp on the floor slab.
6. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: and in the step two, in the sequence number (III), the light inner wallboard is righted by adopting mounting equipment and lifted to 20-30 mm away from the surface of the floor slab, and then the light inner wallboard is inserted into the U-shaped clamp.
7. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the step III, the depth of the electric pipeline cutting groove is less than or equal to 1/3 of the thickness of the light inner wall plate, and the horizontal length of the electric pipeline cutting groove is less than or equal to 1/3 of the width of the light inner wall plate.
8. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the step III, a gap of 2 mm-3 mm is reserved between the bottom of the light inner wallboard skirting board and the ground.
9. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 1, which is characterized in that: in the step three serial number (ten), the light-weight inner wallboard plastering comprises the following steps of:
1) Base layer treatment
After the light inner wall board is installed for 14 days, the light inner wall board is plastered, a high-pressure sprayer is adopted to flush and moisten the light inner wall board from top to bottom before the light inner wall board is plastered, the wall surface of the light inner wall board is uniformly seeped to a depth of 10 mm-15 mm, and the surface of the light inner wall board is moist and has no clear water during the plastering;
2) Thin plastering
① Preparing bonding layer paste, and stirring to uniformity;
② Preparing anti-cracking mortar, and stirring until the anti-cracking mortar is uniform;
③ Wetting a light inner wall plate by adopting a sprayer, sticking a cake, punching ribs, aligning, cleaning slurry along with scraping a bonding layer, scraping anti-cracking mortar along with scraping the bonding layer, and scraping the bonding layer to a thickness of 5-10 mm;
④ After the aluminum alloy scraping bar is adopted for scraping, rubbing and fine leveling, the bonding layer with the thickness of 1 mm-1.5 mm is scraped and smeared evenly, and a wood trowel is adopted for napping and leveling, and a plastic trowel is adopted for finishing pressing Mao Guang before initial setting.
10. The method for anti-cracking construction of the assembled steel structure light-weight inner wallboard according to claim 9, wherein the method comprises the following steps: the weight ratio of the bonding layer clean slurry is glue-free gypsum powder, water=1:3, and the weight ratio of the anti-cracking mortar is glue-free gypsum powder, medium sand=1:2.
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