CN111042573A - Construction method and structure for additionally arranging lift apartment sandwich floor without dehumidification operation - Google Patents
Construction method and structure for additionally arranging lift apartment sandwich floor without dehumidification operation Download PDFInfo
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- CN111042573A CN111042573A CN201911417109.4A CN201911417109A CN111042573A CN 111042573 A CN111042573 A CN 111042573A CN 201911417109 A CN201911417109 A CN 201911417109A CN 111042573 A CN111042573 A CN 111042573A
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- prefabricated light
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0266—Enlarging
- E04G23/027—Loft conversion by truss modification
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Abstract
A construction method and structure of adding the sandwich floor of the loft apartment of avoiding the wet operation, adopt the steel beam to support the prefabricated light template of the steel skeleton to replace the traditional reinforced concrete floor, the steel beam is fixed on the buried plate of the wall of both ends through welding, the angle steel is welded to the side of steel beam to form and support, the prefabricated light template of the steel skeleton is embedded among steel beams, the invention has greatly shortened the construction cycle, and solved the problem that the finish finishing of the late stage of the loft apartment is apt to be polluted by wet operation of sandwich structure of alternate construction effectively, has greatly reduced the input and sand of the construction site labour force, stone, cement consumption, save resources effectively, reduce the environmental pollution; meanwhile, the load is reduced by changing the interlayer material to meet the requirement of earthquake-resistant calculation, and the problem that the sizes of the depth beam and the outer wall frame beam are too large to influence the use of functions is effectively solved; moreover, the space of the sandwich structure can be fully utilized to pass pipelines, the thickness of the sandwich ground is reduced, and therefore the room clearance is improved.
Description
Technical Field
The invention relates to a construction method and a structure for adding a lift apartment sandwich floor slab without wet operation.
Background
In recent years, as urban living population is more and more, urban central zone building land is less and less, more and more developers tend to design small house type as loft, and duplex apartments become mainstream at present and in a certain period of time later. The construction difficulty of the loft structure lies in the construction of the sandwich plate, the traditional method is a reinforced concrete sandwich floor slab, and the method needs concrete pouring and water application maintenance, so that the problems of vertical and horizontal transportation, pollution and the like of later-stage wet operation are difficult to solve, and great construction period pressure is caused for fine decoration construction.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a construction method and a structure for additionally arranging a lift apartment sandwich floor slab, which are simple and convenient to operate, short in construction period and free of wet operation and reduce labor input in a construction site.
The purpose of the invention is realized by adopting the following technical scheme:
a construction method for adding a lift apartment sandwich floor without wet operation comprises the following steps:
a. coating antirust paint:
rust removal is carried out on the surface of the steel member after the steel member enters a field;
b. post-embedded part construction:
positioning according to elevation, space and edge distance of a drawing, and fixing the connecting steel plate on the base layer by using a chemical anchor bolt;
c. installing a steel beam:
according to the elevation line and the central line of the steel beam, a transition connecting piece is welded on the connecting steel plate, then the steel beam is respectively welded with the lower flange of the transition connecting piece and the connecting steel plate after being grooved and positioned, and a gap between the steel beam and the connecting steel plate is sealed by building sealant;
d. installing angle steel:
according to the positioning and marking line, fixing an angle steel bracket on the base layer by adopting a chemical anchor bolt, welding the angle steel corresponding to the position of the angle steel bracket on the steel beam, and adding a plurality of triangular stiffening plates on the lower part of the angle steel along the extending direction of the angle steel, wherein the triangular stiffening plates are respectively welded with the angle steel and the steel beam;
e. laying a steel skeleton prefabricated light plate:
the steel skeleton prefabricated light-duty plate is laid between the corresponding angle steel brackets and the angle steel by adopting a downward bearing type connection laying method;
f. joint filling:
after the steel skeleton prefabricated light plate is laid, joint filling treatment is carried out on the joint, joints of the steel skeleton prefabricated light plate and the steel beam and joints of the steel skeleton prefabricated light plate and the base layer adopt cement perlite heat-preservation mortar for joint filling, and joint joints of the steel skeleton prefabricated light plate adopt silicone weather-resistant glue for joint filling;
g. spraying fireproof paint:
and spraying fireproof paint on the steel member.
Further, in the step d, the distance between the adjacent stiffening plates is 600 mm.
And step e, after the steel beam and the angle steel are welded, performing repair spraying of antirust paint on the welded joints of the steel beam and the angle steel.
And further, in the step g, the fire endurance of the steel member after spraying the fireproof coating is not less than 2 hours.
The utility model provides an exempt from wet operation add loft apartment sandwich floor structure, includes the connecting plate who fixes on basic unit through the crab-bolt, set up in pairs, the welding has transition connecting piece on the connecting plate, installs the girder steel on the relative connecting plate, the girder steel welds with transition connecting piece lower limb and connecting plate respectively, the welding has the angle steel along girder steel length direction on the girder steel, is fixed with angle steel support through the crab-bolt on the basic unit that corresponds with the girder steel, the prefabricated plate has been erect between angle steel and the angle steel support.
Furthermore, joints of the steel skeleton prefabricated light plate and the steel beam and joints of the steel skeleton prefabricated light plate and the base layer are filled with cement-perlite heat-insulating mortar, and joints of the steel skeleton prefabricated light plate joints are sewn with silicone weather-resistant adhesive.
Further, the anchor bolt is a chemical anchor bolt.
Furthermore, the gap between the steel beam and the connecting steel plate is filled with building sealant for plugging.
Furthermore, the prefabricated plate is a steel skeleton prefabricated light plate.
Further, the girder steel is the rectangular steel pipe of Q235B material.
By adopting the method and the structure, the steel beam supports the steel skeleton prefabricated lightweight board to replace the traditional reinforced concrete floor, the steel beam is fixed on the embedded plates of the wall surfaces at two ends through welding, the angle steel is welded to the side surface of the steel beam to form a support, and the steel skeleton prefabricated lightweight board is embedded between the steel beams; meanwhile, the load is reduced by changing the interlayer material to meet the requirement of earthquake-resistant calculation, and the problem that the sizes of the depth beam and the outer wall frame beam are too large to influence the use of functions is effectively solved. In conclusion, the device is simple and convenient to operate, short in construction period, low in resource consumption and easy to popularize.
Drawings
FIG. 1(a) is a detailed view of a rear mounted embedded member node of the present invention;
FIG. 1(b) is a cross-sectional view taken along the plane A-A in FIG. 1 (a);
FIG. 2 is a detailed view of the joint of the steel skeleton light plate and the shear wall or beam according to the present invention;
FIG. 3 is a detailed view of the joint of the steel skeleton light plate and the steel beam of the present invention;
FIG. 4 is a detailed view of the steel skeleton light plate seam joint of the present invention.
In the figure: 1-chemical anchor bolts, 2-connecting steel plates, 3-transition connecting pieces, 4-steel beams, 5-base layers, 6-building sealant, 7-angle steel supports, 8-steel skeleton prefabricated light plates, 9-cement perlite thermal insulation mortar, 10-angle steel, 11-stiffening plates and 12-silicone weather-resistant adhesive.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
A construction method for adding a lift apartment sandwich floor without wet operation comprises the following steps:
(1) and coating antirust paint:
the steel member and accessories thereof need to be subjected to shot blasting rust removal (the steel member refers to a steel beam, a transition connecting piece, angle steel, a connecting steel plate, an angle steel bracket and a steel framework prefabricated light plate), the grade is Sa2.5, after the surface of the steel member is cleaned, two epoxy zinc-rich primer, epoxy mica iron intermediate paint and fluorocarbon finish paint are sequentially brushed on the surface of the steel member from inside to outside to serve as antirust paint, the thickness of a dry paint film of the epoxy zinc-rich primer is not less than 60 mu m, the thickness of a dry paint film of the epoxy mica iron intermediate paint is not less than 100 mu m, and the thickness of a dry paint film of the fluorocarbon. When the antirust paint is specifically coated: and (3) coating a first antirust paint, and allowing the secondary coating after the primer is fully dried. And (3) temporarily not painting the two sides of the on-site welding line by 50mm before the installation of the component, and after the on-site installation is finished, paint is replenished according to the requirements.
(2) And post-embedded part construction:
referring to fig. 1(a) and 1(b), the positions of the connecting steel plates 2 are determined on a base layer 5 (the base layer 5 is a concrete beam or a wall) according to elevation, space and margin of drawings, and each connecting steel plate 2 needs 4M 12 chemical anchor bolts 1 for fixing. Drilling a hole with the diameter of 15-18 mm on the base layer 5, wherein the depth is more than or equal to 110mm, removing floating dust and dust in the hole by using tools such as an air pressure blowpipe and the like, putting a chemical agent pipe into the hole, screwing a screw rod by using an electric drill until the agent flows out, and fixing the connecting steel plate 2 by adding a gasket and a hexagon nut after the agent is completely hardened. When drilling, the drill matched with the anchor bolt is used, so that the reinforcing steel bar cannot be damaged. The bolt must be screwed in by an electric drill, and a chemical anchor bolt is used for carrying out a field bearing capacity detection test.
(3) And mounting the steel beam 4 (the steel beam is a rectangular steel pipe made of Q235B):
according to the elevation line and the beam center line, a transition connecting piece 3 is welded on a connecting steel plate 2 (in the embodiment, the transition connecting piece 3 is an I-shaped steel), then a steel beam 4 is grooved and positioned and then is respectively welded with a lower flange of the transition connecting piece 3 and the connecting steel plate 1 (in the embodiment, the steel beam 4 is a rectangular steel pipe), and a gap between the steel beam 4 and the connecting steel plate 1 is sealed by building sealant 6.
(4) And installing angle steel:
referring to fig. 2, according to the positioning and marking line, double rows of M12 chemical anchors 1 are used to fix the angle steel bracket 7 to the position of the base layer 5 corresponding to the steel beam, and the distance between each row of chemical anchors 1 is 200 mm. The connection of the angle steel 10 and the steel beam 4 is shown in fig. 3, according to the positioning and marking line, the angle steel 10 is welded to the steel beam 4, a triangular stiffening plate 11 is added at the lower part of the angle steel 10, the stiffening plate 11 is respectively welded with the angle steel 10 and the steel beam 4, and the distance between the adjacent stiffening plates 11 is 600 mm.
(5) Laying a steel skeleton prefabricated light plate 8:
and after the steel beam 4 and the angle steel 10 are welded, performing antirust paint repair spraying on the welded joints of the steel beam 4 and the angle steel 10. Whether the steel skeleton prefabricated light-duty plate 8 deforms or not needs to be checked before the steel skeleton prefabricated light-duty plate 8 is installed, if the steel skeleton prefabricated light-duty plate 8 deforms to influence the connection between plates, correction equipment needs to be used for repairing, and the connection firmness between the adjacent steel skeleton prefabricated light-duty plates 8 is guaranteed. The steel skeleton prefabricated light-weight plates 8 are laid by adopting an underpinning type connection method, the steel skeleton prefabricated light-weight plates 8 are erected on the angle steel brackets 7 and the angle steels 10, and are laid one by one according to the design number sequence during laying.
(6) And joint filling:
after the steel skeleton prefabricated light plate 8 is laid, joints of the steel skeleton prefabricated light plate 8 and the steel beam 4 and joints of the steel skeleton prefabricated light plate 8 and the base layer 5 are filled with cement perlite thermal insulation mortar 9, and joints of the steel skeleton prefabricated light plate 8 are sewn with silicone weather-resistant glue 12.
(7) And spraying fireproof paint:
the thin fireproof paint is sprayed on the steel structure, and the fire endurance is not less than 2 hours. During specific construction, a bucket type spray gun is adopted for spraying, the air pressure set for spraying the fireproof paint is 0.4-0.6 MPa, and the diameter of a gun mouth of the spray gun is 6-8 mm. The first spraying thickness is required to cover the surface of the base layer 5, and the spraying thickness is not more than 1 mm; and after the previous coating is completely dried, the next coating is carried out, and in the construction process, an operator adopts a thickness measuring needle to detect the thickness of the coating until the thickness meets the thickness specified by a corresponding detection report, so that the spraying can be stopped.
Constructing according to the method, forming an additional-lift apartment sandwich floor structure free of wet operation, comprising connecting steel plates 2 which are fixed on a base layer 5 through chemical anchor bolts 1 and are arranged in pairs, wherein transition connecting pieces 3 are welded on the connecting steel plates, steel beams 4 are arranged on the opposite connecting steel plates 2 and are rectangular steel pipes made of Q235B material, a gap between each steel beam and the corresponding connecting steel plate is filled with building sealant 6 for plugging, the steel beams are respectively welded with a lower flange of the transition connecting piece and the connecting steel plates, angle steel 10 is welded on each steel beam along the length direction of the steel beam, an angle steel bracket 7 is fixed on the base layer corresponding to the steel beam through the chemical anchor bolts, a steel skeleton prefabricated light plate 8 is erected between each angle steel and the angle steel bracket, joints between the steel skeleton prefabricated light plate and the steel beams, and the steel skeleton prefabricated light plate and the base layer adopt perlite cement thermal insulation mortar joint 9, the joint of the steel skeleton prefabricated light plate seam adopts silicone weather-resistant glue to perform pointing 12.
By adopting the technical scheme, as the assembly type construction is adopted, compared with the traditional reinforced concrete floor slab, the construction links of site formwork erecting, reinforcing steel bar binding, concrete pouring, maintenance and the like can be saved, the labor input and the use amount of sand, stone and cement in the construction site are greatly reduced, the resources are effectively saved, and the environmental pollution is reduced; meanwhile, the load is reduced by changing the interlayer material to meet the requirement of earthquake-resistant calculation, and the problem that the sizes of the depth beam and the outer wall frame beam are too large to influence the use of functions is effectively solved.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A construction method for adding a lift apartment sandwich floor without wet operation is characterized in that:
a. coating antirust paint:
rust removal is carried out on the surface of the steel member after the steel member enters a field;
b. post-embedded part construction:
positioning according to elevation, space and edge distance of a drawing, and fixing the connecting steel plate on the base layer by using a chemical anchor bolt;
c. installing a steel beam:
according to the elevation line and the central line of the steel beam, a transition connecting piece is welded on the connecting steel plate, then the steel beam is respectively welded with the lower flange of the transition connecting piece and the connecting steel plate after being grooved and positioned, and a gap between the steel beam and the connecting steel plate is sealed by building sealant;
d. installing angle steel:
according to the positioning and marking line, fixing an angle steel bracket on the base layer by adopting a chemical anchor bolt, welding the angle steel corresponding to the position of the angle steel bracket on the steel beam, and adding a plurality of triangular stiffening plates on the lower part of the angle steel along the extending direction of the angle steel, wherein the triangular stiffening plates are respectively welded with the angle steel and the steel beam;
e. laying a steel skeleton prefabricated light plate:
the steel skeleton prefabricated light-duty plate is laid between the corresponding angle steel brackets and the angle steel by adopting a downward bearing type connection laying method;
f. joint filling:
after the steel skeleton prefabricated light plate is laid, joint filling treatment is carried out on the joint, joints of the steel skeleton prefabricated light plate and the steel beam and joints of the steel skeleton prefabricated light plate and the base layer adopt cement perlite heat-preservation mortar for joint filling, and joint joints of the steel skeleton prefabricated light plate adopt silicone weather-resistant glue for joint filling;
g. spraying fireproof paint:
and spraying fireproof paint on the steel member.
2. The construction method of the free-of-wet work floor slab with the added loft apartment sandwich floor as claimed in claim 1, wherein: in the step d, the distance between the adjacent stiffening plates is 600 mm.
3. The construction method of the free-of-wet work floor slab with the added loft apartment sandwich floor as claimed in claim 1, wherein: and e, after the steel beam and the angle steel are welded, performing repair spraying of antirust paint on the welded joints of the steel beam and the angle steel.
4. The construction method of the free-of-wet work floor slab with the added loft apartment sandwich floor as claimed in claim 1, wherein: and g, spraying the fireproof coating on the steel member for not less than 2 hours.
5. The utility model provides an add loft apartment sandwich floor structure of exempting wet operation which characterized in that: including fix the connecting plate who sets up in pairs on the basic unit through the crab-bolt, the welding has transition piece on the connecting plate, installs the girder steel on the relative connecting plate, the girder steel welds with transition piece bottom flange and connecting plate respectively, there is the angle steel along girder steel length direction welding on the girder steel, through the fixed angle steel support of crab-bolt on the basic unit that corresponds with the girder steel, the prefabricated plate has been erect between angle steel and the angle steel support.
6. The moisture free additionally set loft apartment sandwich floor structure of claim 5, wherein: joints of the steel skeleton prefabricated light plate and the steel beam and joints of the steel skeleton prefabricated light plate and the base layer are filled with cement-perlite heat-insulating mortar, and joints of the steel skeleton prefabricated light plate and the base layer are sewn with silicone weather-resistant adhesive.
7. The moisture free additionally set loft apartment sandwich floor structure of claim 5, wherein: the anchor bolt is a chemical anchor bolt.
8. The moisture free additionally set loft apartment sandwich floor structure of claim 5, wherein: and building sealant is filled in the gap between the steel beam and the connecting steel plate for plugging.
9. The moisture free additionally set loft apartment sandwich floor structure of claim 5, wherein: the prefabricated plate is a steel skeleton prefabricated light plate.
10. The moisture free additionally set loft apartment sandwich floor structure of claim 5, wherein: the girder steel is the rectangle steel pipe of Q235B material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417109.4A CN111042573A (en) | 2019-12-31 | 2019-12-31 | Construction method and structure for additionally arranging lift apartment sandwich floor without dehumidification operation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911417109.4A CN111042573A (en) | 2019-12-31 | 2019-12-31 | Construction method and structure for additionally arranging lift apartment sandwich floor without dehumidification operation |
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| CN111042573A true CN111042573A (en) | 2020-04-21 |
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| CN201911417109.4A Pending CN111042573A (en) | 2019-12-31 | 2019-12-31 | Construction method and structure for additionally arranging lift apartment sandwich floor without dehumidification operation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267605A (en) * | 2020-09-30 | 2021-01-26 | 中建二局第一建筑工程有限公司 | Light floor support plate, mounting device and mounting method thereof |
| CN115434536A (en) * | 2022-09-29 | 2022-12-06 | 江苏省江南建筑技术发展有限公司 | Node external member for additionally arranging concrete interlayer in tall space and construction method |
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| CN204098314U (en) * | 2014-08-28 | 2015-01-14 | 天津三建建筑工程有限公司 | Steel plate combination floor |
| CN105821964A (en) * | 2016-04-07 | 2016-08-03 | 苏州罗普斯金铝业股份有限公司 | Aluminum alloy section |
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| CN208137126U (en) * | 2018-03-20 | 2018-11-23 | 江西雄宇筑工科技有限公司 | A kind of Prefabricated Concrete frame beam column |
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2019
- 2019-12-31 CN CN201911417109.4A patent/CN111042573A/en active Pending
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| JP2000144905A (en) * | 1998-11-12 | 2000-05-26 | Ohbayashi Corp | Mixed structural beam |
| CN204098314U (en) * | 2014-08-28 | 2015-01-14 | 天津三建建筑工程有限公司 | Steel plate combination floor |
| CN105821964A (en) * | 2016-04-07 | 2016-08-03 | 苏州罗普斯金铝业股份有限公司 | Aluminum alloy section |
| CN107299710A (en) * | 2017-06-21 | 2017-10-27 | 中天建设集团浙江钢构有限公司 | Integrated assembled type light floor and its construction method |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267605A (en) * | 2020-09-30 | 2021-01-26 | 中建二局第一建筑工程有限公司 | Light floor support plate, mounting device and mounting method thereof |
| CN115434536A (en) * | 2022-09-29 | 2022-12-06 | 江苏省江南建筑技术发展有限公司 | Node external member for additionally arranging concrete interlayer in tall space and construction method |
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