CN111088865A - Construction method of hollow floor slab - Google Patents
Construction method of hollow floor slab Download PDFInfo
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- CN111088865A CN111088865A CN201811236161.5A CN201811236161A CN111088865A CN 111088865 A CN111088865 A CN 111088865A CN 201811236161 A CN201811236161 A CN 201811236161A CN 111088865 A CN111088865 A CN 111088865A
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- concrete
- gypsum filling
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- gypsum
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/326—Floor structures wholly cast in situ with or without form units or reinforcements with hollow filling elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a construction method of a hollow floor slab, which comprises the following steps of firstly, construction preparation; step two, template installation; step three, measuring and paying off; step four, binding steel bars; step five, water and electricity are pre-buried; step six, installing a gypsum filling box; seventhly, installing plate steel bars; and step eight, concrete pouring and tamping. The method adopts a gypsum filling box dense rib floor system to increase the clear height of a large-span building space, so that the building space is open and the dead weight is light, and simultaneously has the remarkable advantages of same bidirectional stress and force transfer, small deflection deformation, good shearing and torsion resistance, good crack resistance and shock resistance and the like, thereby improving the overall performance of the floor, effectively reducing the thickness of the floor and lightening the dead weight of the structure.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method of a hollow floor slab.
Background
The hollow floor slab is a prefabricated floor slab. One or more total longitudinal ducts are provided in order to save material and reduce weight. Usually made of prestressed concrete, the dimensions of which depend on the size of the bay and the capacity of the hoisting machinery. The channels in the panel are advantageous for sound and heat insulation.
At present, a hollow box floor slab is also constructed, small concrete hollow boxes are used as unit bodies, the boxes are connected through reinforcing steel bars, concrete is poured in gaps, the technology saves materials, the weight of the floor slab is light, and the hollow box floor slab is mainly used in high-rise buildings.
However, the limit of large-span building space height often exists in the construction process of the existing hollow floor slab, so that the building space is relatively closed, and the weight is large.
Disclosure of Invention
The invention aims to provide a construction method of a hollow floor slab, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a hollow floor slab comprises the following steps:
firstly, construction preparation;
step two, installing a template, calculating a template supporting system of the gypsum filling box, building the supporting system according to a calculation result, paving the template after building is finished, and performing bidirectional arching according to a drawing and design requirements; the support distance between the hidden beam and the steel pipe frame at the lower part of the column cap is encrypted;
measuring and paying off, paying off according to the layout, paying off a position line of the rib beam, and determining the installation position of the gypsum filling box;
fourthly, binding reinforcing steel bars, installing the reinforcing steel bars according to a construction drawing, and binding and constructing the beam reinforcing steel bars according to a national building standard design drawing and a beam reinforcing steel bar binding construction scheme;
step five, water and electricity are pre-buried;
step six, installing a gypsum filling box, wherein the installation of the gypsum filling box comprises the following steps:
firstly, placing a gypsum filling box on a template after paying off;
secondly, hoisting the gypsum filling boxes to the board surface, and stacking the gypsum filling boxes in a scattered manner;
thirdly, cleaning the board surface to ensure that the gypsum filling box is tightly contacted with the template surface;
fourthly, installing the mold boxes, and uniformly cushioning the four corners of the lower part of each mold box with concrete cushion blocks with the height consistent with the thickness of the lower plate;
fifthly, adjusting the gypsum filling box according to a design construction drawing and ensuring that the rib beam is horizontal and vertical;
step seven, installing plate steel bars, namely, batching and installing the plate steel bars according to the design requirements of a construction drawing, enabling the same layer of the rib beam steel bars and the plate steel bars to be in the same direction in the binding process, and reducing the overlapping of the steel bars so as to reduce the height;
and step eight, concrete pouring and tamping.
As a further scheme of the invention: in the first step, the construction preparation is divided into the following processes:
s1, compiling a material entrance plan according to the drawing size and the specification of the gypsum filling box type number and entrusting a manufacturer to produce;
s2, organizing construction technicians to conduct targeted learning, conducting technical safety settlement aiming at teams and groups of different work types, and making labor preparation;
s3, dividing a special material field on the site before construction, and processing the field according to the relevant regulations of gypsum filling box stacking;
s4, inspecting the appearances of the gypsum filling boxes one by one after the gypsum filling boxes enter the field, and sealing and filling damaged boxes of the gypsum filling boxes;
and S5, performing typesetting design of the gypsum filling box according to the construction drawing.
As a still further scheme of the invention: in the fifth step, the water and electricity pre-burying comprises the following procedures:
s1, pre-buried pipelines are reserved in cast-in-place concrete plates or rib beams at the lower parts of the gypsum filling boxes;
s2, replacing a gypsum filling box with a smaller height or a smaller size with a gypsum filling box with a standard specification, wherein the height of the embedded wire box exceeds the thickness of the lower plate or a vertical hole needs to be reserved, and reserving a solid concrete plate strip;
s3, installing and fixing a conduit and a cassette of water and electricity;
and S4, embedding floor slab sleeves such as fire fighting pipes, rainwater pipes and the like and distribution pipe wells in the solid floor slab adjusting areas at the beam and column sides.
As a still further scheme of the invention: in the step eight, concrete pouring and smashing are carried out in the following sequence:
firstly, transversely and vertically installing the multi-ribbed ribs of a gypsum filling box, carrying out concealed acceptance according to the standard requirements, repairing and replacing the damaged die box, and adjusting the transverse flatness and vertical degree of the multi-ribbed ribs with deviation not meeting the standard;
secondly, watering and wetting the mold box to ensure that the difference between the water content of the mold box and the saturated water content of the mold box is not more than 5 percent;
thirdly, pouring according to the sequence from the retaining wall to the column cap to the beam and the bottom layer of the plate to the surface layer of the beam and the plate, wherein in the concrete pouring process, a vibrating rod vibrates along with the flowing of concrete;
and fourthly, curing the concrete, removing the formwork, and curing at low temperature and high temperature after the concrete is poured.
As a still further scheme of the invention: in the third step of concrete pouring, the concrete is constructed by pumping, the slump is between 180 and 220mm, the particle size of the aggregate is less than 16mm, and the concrete is formed by twice pouring on the bottom layer and the surface layer.
As a still further scheme of the invention: the slump of the bottom layer casting concrete is more than 220mm, the initial discharge height is controlled at 2/5 slab thickness, and the rib-jumping construction method is adopted for casting.
As a still further scheme of the invention: the slump of the concrete poured on the surface layer is 180-200mm, and the concrete is vibrated by a common vibrating rod.
As a still further scheme of the invention: and the low-temperature maintenance is to protect the finished product by using a film covering measure in winter or rainy days.
As a still further scheme of the invention: and the high-temperature curing is to cure the finished product by using a watering measure at a higher external temperature.
Compared with the prior art, the invention has the beneficial effects that: the method adopts a gypsum filling box dense rib floor system to increase the clear height of a large-span building space, so that the building space is open and the dead weight is light, and simultaneously has the remarkable advantages of same bidirectional stress and force transfer, small deflection deformation, good shearing and torsion resistance, good crack resistance and shock resistance and the like, thereby improving the overall performance of the floor, effectively reducing the thickness of the floor and lightening the dead weight of the structure.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A construction method of a hollow floor slab comprises the following steps:
firstly, construction preparation;
step two, installing a template, and calculating a template supporting system of the gypsum filling box, wherein the saturated volume weight of the gypsum filling box needs to be fully considered in the calculation process, the supporting system is strictly set up according to the calculation result, the template is laid after the arrangement is finished, and the bidirectional arching is carried out according to the drawing and the design requirement; the support spacing of the hidden beam and the steel pipe frame at the lower part of the column cap is encrypted, and the support spacing of the steel pipe frame at the lower part of the floor slab is encrypted according to a special construction scheme;
measuring and paying off, paying off according to the layout, paying off a position line of the rib beam, and determining the installation position of the gypsum filling box;
fourthly, binding reinforcing steel bars, installing the reinforcing steel bars according to a construction drawing, and binding and constructing the beam reinforcing steel bars according to a national building standard design drawing and a beam reinforcing steel bar binding construction scheme;
step five, water and electricity are pre-buried;
step six, installing a gypsum filling box, further comprising the following steps:
firstly, placing a gypsum filling box on a template after paying off;
secondly, hoisting the gypsum filling boxes to the board surface, and stacking the gypsum filling boxes in a scattered manner so as to avoid causing overlarge concentrated load;
thirdly, cleaning the board surface to ensure that the gypsum filling box is tightly contacted with the template surface;
fourthly, installing the die boxes, and uniformly cushioning concrete cushion blocks with the height consistent with the thickness of the lower plate on four corners of the lower part of each die box, so as to ensure the thickness of the bottom plate and simultaneously ensure that a protective layer is formed between the reinforcing steel bars and the die boxes;
fifthly, after the mould boxes are placed, arranging workers to adjust the gypsum filling box according to a design construction drawing so as to ensure that the width of the rib beam meets the design requirement and the rib beam is horizontal and vertical;
step seven, installing plate steel bars, namely batching and installing the plate steel bars according to the design requirements of a construction drawing, enabling the same layer of the rib beam steel bars and the plate steel bars to be in the same direction in the binding process, reducing the overlapping of the steel bars to reduce the height, and ensuring the thickness of a protective layer of the plate steel bars;
step eight, concrete pouring and smashing, wherein the concrete pouring and smashing is carried out in the following sequence:
firstly, transversely and vertically installing the multi-ribbed ribs of the gypsum filling box, carrying out concealed acceptance inspection according to the standard requirements, repairing and replacing the damaged die box, adjusting the transverse flatness and the vertical degree of the multi-ribbed ribs with deviation not meeting the standard, and carrying out concrete pouring construction after the acceptance inspection is qualified;
watering and wetting the mold box to ensure that the difference between the water content of the mold box and the saturated water content of the mold box is not more than 5 percent, and when watering, paying attention to the fact that the water pressure cannot be too large and the speed cannot be too fast, and ensuring that the upper mold box and the lower mold box absorb water uniformly, so that the loss of cement paste in concrete during concrete pouring can be reduced, the dead weight of the mold boxes can be increased, and the purpose of resisting floating is achieved;
thirdly, pouring is carried out according to the sequence from the retaining wall to the column cap to the beam and the bottom layer of the plate to the surface layer of the beam and the plate, the column is not suitable for being poured at one time, cold seams formed at the top of the column are avoided, the structure safety is not facilitated, and a vibrating rod vibrates along with the flowing of concrete in the concrete pouring process; the concrete is preferably constructed by pumping, the slump is preferably between 180 and 220mm, the particle size of aggregate is preferably less than 16mm, the concrete is formed by two times of pouring of a bottom layer and a surface layer, wherein the slump of the concrete poured on the bottom layer is preferably more than 220mm, the first discharging height is preferably controlled at the thickness of 2/5 slabs, and the concrete is poured by adopting a rib jumping construction method, such as 1, 3 rib pouring or 2, 4 rib pouring; the blanking position is arranged at the crossed cross position of the four mould boxes as far as possible, the periphery of the blanking position is vibrated and compacted by a 50 or 30 vibrating spear, the lower plate must be ensured to be cast compactly when the bottom layer is cast, and the condition of vibration leakage cannot occur; in the concrete pouring process, if the operation is improper for constructors, excessive blanking at a certain position can extrude the mold box to shift, and the position of the mold box can be immediately recovered by arranging the constructors; the slump of concrete poured on the surface layer can be 180-200mm, the height of the concrete poured on the surface layer can be poured and leveled according to the design requirement, a common vibrating rod is adopted for vibrating, and a vibrating mould box at the rod end of the vibrating rod is avoided during vibrating so as to avoid damaging the mould box, but needs to be vibrated compactly;
fourthly, curing and removing the concrete, curing by taking relevant measures after the concrete is poured, and protecting a finished product by taking effective measures such as film covering and the like during construction in winter or rainy days; when the outside temperature is higher, watering maintenance is adopted, and the formwork can be removed after the concrete reaches the standard requirement and the design strength.
Example 2
In order to make the technical solution in the present application more complete and detailed, a supplementary description is further made on the basis of the above embodiment 1, so that the technical means used in the present application are disclosed more fully, wherein the technical feature of the supplementary part is that in the step one, the construction preparation is divided into the following flows:
s1, compiling a material entrance plan according to the drawing size and the specification of the gypsum filling box type number and entrusting a professional manufacturer to produce;
s2, organizing construction technicians to conduct targeted learning, conducting technical safety settlement aiming at teams and groups of different work types, and making labor preparation;
s3, dividing a special material field on the site before construction, and processing the field according to the relevant regulations of gypsum filling box stacking;
s4, inspecting the appearances of the gypsum filling boxes one by one after the gypsum filling boxes enter the field, and sealing and filling damaged gypsum filling box bodies, wherein the damaged gypsum filling box bodies are not used by people who seriously exceed standards;
s5, performing typesetting design of the gypsum filling box according to the construction drawing;
in the fifth step, the water and electricity pre-burying comprises the following procedures:
s1, pre-buried pipelines are reserved in cast-in-place concrete plates or rib beams at the lower parts of the gypsum filling boxes, and secondary hole opening is avoided;
s2, replacing a gypsum filling box with a smaller height or a smaller size with a gypsum filling box with a standard specification, wherein the height of the embedded wire box exceeds the thickness of the lower plate or a vertical hole needs to be reserved, and reserving a solid concrete plate strip;
s3, installing and fixing a conduit and a cassette of water and electricity;
and S4, embedding floor slab sleeves such as fire fighting pipes, rainwater pipes and the like and distribution pipe wells in the solid floor slab adjusting areas at the beam and column sides.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A construction method of a hollow floor slab is characterized by comprising the following steps:
firstly, construction preparation;
step two, installing a template, calculating a template supporting system of the gypsum filling box, building the supporting system according to a calculation result, paving the template after building is finished, and performing bidirectional arching according to a drawing and design requirements; the support distance between the hidden beam and the steel pipe frame at the lower part of the column cap is encrypted;
measuring and paying off, paying off according to the layout, paying off a position line of the rib beam, and determining the installation position of the gypsum filling box;
fourthly, binding reinforcing steel bars, installing the reinforcing steel bars according to a construction drawing, and binding and constructing the beam reinforcing steel bars according to a national building standard design drawing and a beam reinforcing steel bar binding construction scheme;
step five, water and electricity are pre-buried;
step six, installing a gypsum filling box, wherein the installation of the gypsum filling box comprises the following steps:
firstly, placing a gypsum filling box on a template after paying off;
secondly, hoisting the gypsum filling boxes to the board surface, and stacking the gypsum filling boxes in a scattered manner;
thirdly, cleaning the board surface to ensure that the gypsum filling box is tightly contacted with the template surface;
fourthly, installing the mold boxes, and uniformly cushioning the four corners of the lower part of each mold box with concrete cushion blocks with the height consistent with the thickness of the lower plate;
fifthly, adjusting the gypsum filling box according to a design construction drawing and ensuring that the rib beam is horizontal and vertical;
step seven, installing plate steel bars, namely, batching and installing the plate steel bars according to the design requirements of a construction drawing, enabling the same layer of the rib beam steel bars and the plate steel bars to be in the same direction in the binding process, and reducing the overlapping of the steel bars so as to reduce the height;
and step eight, concrete pouring and tamping.
2. The method for constructing a hollow floor slab as claimed in claim 1, wherein in the first step, the construction preparation is divided into the following processes:
s1, compiling a material entrance plan according to the drawing size and the specification of the gypsum filling box type number and entrusting a manufacturer to produce;
s2, organizing construction technicians to conduct targeted learning, conducting technical safety settlement aiming at teams and groups of different work types, and making labor preparation;
s3, dividing a special material field on the site before construction, and processing the field according to the relevant regulations of gypsum filling box stacking;
s4, inspecting the appearances of the gypsum filling boxes one by one after the gypsum filling boxes enter the field, and sealing and filling damaged boxes of the gypsum filling boxes;
and S5, performing typesetting design of the gypsum filling box according to the construction drawing.
3. The construction method of the hollow floor slab as claimed in claim 1, wherein in the fifth step, the water and electricity pre-burying comprises the following procedures:
s1, pre-buried pipelines are reserved in cast-in-place concrete plates or rib beams at the lower parts of the gypsum filling boxes;
s2, replacing a gypsum filling box with a smaller height or a smaller size with a gypsum filling box with a standard specification, wherein the height of the embedded wire box exceeds the thickness of the lower plate or a vertical hole needs to be reserved, and reserving a solid concrete plate strip;
s3, installing and fixing a conduit and a cassette of water and electricity;
and S4, embedding floor slab sleeves such as fire fighting pipes, rainwater pipes and the like and distribution pipe wells in the solid floor slab adjusting areas at the beam and column sides.
4. The method for constructing a hollow floor slab as claimed in claim 1, wherein in the eighth step, the concrete is poured in the following order:
firstly, transversely and vertically installing the multi-ribbed ribs of a gypsum filling box, carrying out concealed acceptance according to the standard requirements, repairing and replacing the damaged die box, and adjusting the transverse flatness and vertical degree of the multi-ribbed ribs with deviation not meeting the standard;
secondly, watering and wetting the mold box to ensure that the difference between the water content of the mold box and the saturated water content of the mold box is not more than 5 percent;
thirdly, pouring according to the sequence from the retaining wall to the column cap to the beam and the bottom layer of the plate to the surface layer of the beam and the plate, wherein in the concrete pouring process, a vibrating rod vibrates along with the flowing of concrete;
and fourthly, curing the concrete, removing the formwork, and curing at low temperature and high temperature after the concrete is poured.
5. The method as claimed in claim 4, wherein in the third step of concrete pouring, the concrete is pumped to a slump value of 180-220mm, the particle size of the aggregate is less than 16mm, and the concrete is formed by two-time pouring in the bottom layer and the surface layer.
6. The construction method of the hollow floor slab as claimed in claim 5, wherein the slump of the bottom layer casting concrete is more than 220mm, the initial discharge height is controlled at 2/5 slab thickness, and the casting is carried out by adopting a rib jumping construction method.
7. The method as claimed in claim 5, wherein the slump of the concrete poured on the surface layer is 180-200mm, and the concrete is vibrated by a common vibrator.
8. The method as claimed in claim 4, wherein the low temperature curing is a protection of the finished product by a film covering measure in winter or rainy days.
The method as claimed in claim 4, wherein the high temperature curing is curing the finished product with watering means at a high external temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236161.5A CN111088865A (en) | 2018-10-23 | 2018-10-23 | Construction method of hollow floor slab |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236161.5A CN111088865A (en) | 2018-10-23 | 2018-10-23 | Construction method of hollow floor slab |
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| CN111088865A true CN111088865A (en) | 2020-05-01 |
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| CN201811236161.5A Pending CN111088865A (en) | 2018-10-23 | 2018-10-23 | Construction method of hollow floor slab |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622407A (en) * | 2020-05-28 | 2020-09-04 | 中国二十冶集团有限公司 | Construction method of large-cavity hollow floor slab |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077128B1 (en) * | 1999-08-19 | 2003-10-29 | Rigips GmbH | Gypsum plaster carrier boards and false floor system obtainable therefrom |
| CN2602088Y (en) * | 2003-03-27 | 2004-02-04 | 胡伟 | Gypsum template used to pouring concrete rib beam storey cover on the spot |
| CN101644082A (en) * | 2009-08-21 | 2010-02-10 | 贵州金三利科技建材有限公司 | Assembling method of gypsum evacuated mould |
| CN103590602A (en) * | 2013-10-22 | 2014-02-19 | 重庆建工第三建设有限责任公司 | Method for constructing cast-in-site concrete hollow floor systems |
-
2018
- 2018-10-23 CN CN201811236161.5A patent/CN111088865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1077128B1 (en) * | 1999-08-19 | 2003-10-29 | Rigips GmbH | Gypsum plaster carrier boards and false floor system obtainable therefrom |
| CN2602088Y (en) * | 2003-03-27 | 2004-02-04 | 胡伟 | Gypsum template used to pouring concrete rib beam storey cover on the spot |
| CN101644082A (en) * | 2009-08-21 | 2010-02-10 | 贵州金三利科技建材有限公司 | Assembling method of gypsum evacuated mould |
| CN103590602A (en) * | 2013-10-22 | 2014-02-19 | 重庆建工第三建设有限责任公司 | Method for constructing cast-in-site concrete hollow floor systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622407A (en) * | 2020-05-28 | 2020-09-04 | 中国二十冶集团有限公司 | Construction method of large-cavity hollow floor slab |
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Application publication date: 20200501 |