CN111058561A - Construction method for thin-wall square box rib-free accurate positioning hollow floor - Google Patents
Construction method for thin-wall square box rib-free accurate positioning hollow floor Download PDFInfo
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- CN111058561A CN111058561A CN201911243980.7A CN201911243980A CN111058561A CN 111058561 A CN111058561 A CN 111058561A CN 201911243980 A CN201911243980 A CN 201911243980A CN 111058561 A CN111058561 A CN 111058561A
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- steel bars
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- reinforcing steel
- wall square
- floating
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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
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a construction method, in particular to a construction method of a thin-wall square box rib-free accurately-positioned hollow floor. The problem of the displacement that the garage roof used thin wall square chest to lead to is solved. The method comprises the following steps: the concrete pouring formwork comprises a formwork support, a floor formwork is fixed on the formwork support, plate lower portion reinforcing steel bars and hidden beam reinforcing steel bars are bound, anti-floating iron wires and lower portion reinforcing steel bars are bound, the formwork support is connected, thin-wall square boxes are placed at determined positions, anti-floating reinforcing steel bars are arranged above the thin-wall square boxes, tensile reinforcing steel bars are arranged between the anti-floating reinforcing steel bars and the plate lower portion reinforcing steel bars, positioning reinforcing steel bars are installed on two sides of each thin-wall square box, lower portion reinforcing steel bars of connecting plates at lower ends of the positioning reinforcing steel bars and upper portion reinforcing steel bars of the mounting plates. According to the scheme provided by the invention, the thin-wall box body can be bound with the steel bars in the garage top plate, the thin-wall box body is completely fixed, horizontal and vertical displacement is not generated, the structure is uniformly distributed, the stress is balanced, and the force bearing effect is good.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method of a thin-wall square box rib-free accurately-positioned hollow floor.
Background
The thin-wall square box hollow floor system is a hidden beam cavity plate structure floor system formed from concrete and light building material. The application that present garage roof adopted the hollow superstructure of no roof beam is more and more extensive, and GBF thin wall square chest is as a novel material, applies to the hollow superstructure structure of cast in situ concrete and can reduce the superstructure dead weight, and especially the improvement effect of basement position to building upper portion headroom is showing. However, due to the lack of effective fixing measures, the thin-wall square box is easy to cause dislocation, movement and floating of the box body in the construction process, and a simple and quick solution technology is urgently needed to be found at present.
CN 204081183U discloses an anti fixing device that floats of thin wall square chest hollow superstructure mandrel, the device includes the support framed bent that supports the hollow superstructure, the support framed bent contains the pole setting of at least three rows of equal interval distribution, the side of pole setting neighbouring top end links firmly horizontal beam pole and the longitudinal beam pole that forms the grid frame structure, the top of pole setting is installed and is had the top support of fork mouth, the top support of each row of corresponding position pole setting imbeds the flitch parallel with the longitudinal beam pole and fixes, fixed bottom form board on the flitch, the upper surface of bottom form board supports the superstructure mandrel through the concrete cushion block ligature, the steel wire that intersects on the superstructure mandrel, the lower extreme of steel wire passes the bottom form winding to be fixed on neighbouring horizontal beam pole or longitudinal beam pole. The floor core mold is directly fixed on the bottom formwork by using steel wires, so that the purpose of fixing the floor core mold is achieved. However, in the construction of the garage top plate, the position and the requirement of the garage top plate are special, and particularly, the garage top plate and the community ground have a large area. And a large amount of heavy objects need to be borne, so that the stress requirement on the whole structure is high, the self-weight requirement is low, and the space proportion requirement of the thin-wall square box is higher. The traditional positioning method and construction method are difficult to solve the problem of displacement of the large-volume thin-wall square box.
Disclosure of Invention
The invention provides a construction method for accurately positioning a hollow floor without a rib by using a thin-wall square box, aiming at solving the problem of displacement caused by using the thin-wall square box on a garage top plate.
The technical scheme for realizing the invention is that the construction method for the thin-wall square box rib-free precise positioning hollow floor comprises the following steps: building a template support, fixing a floor formwork on the template support, and accurately measuring and placing positioning points and lines of the thin-wall square box on the erected floor formwork by adopting a total station and a level gauge; binding the lower reinforcing steel bar of the slab and the reinforcing steel bar of the hidden beam, then arranging anti-floating iron wires which penetrate through a floor formwork after binding the lower reinforcing steel bar of the slab and the reinforcing steel bar of the hidden beam, connecting the upper end of the anti-floating iron wires with the lower reinforcing steel bar, connecting the lower end of the anti-floating iron wires with a formwork support, placing a plurality of mandrel positioning split heads on the floor formwork, firmly binding the split heads with the reinforcing steel bar of the bottom of the slab by using binding wires to prevent displacement, placing a thin-wall square box at a determined position, arranging anti-floating reinforcing steel bars above the thin-wall square box, arranging tensile reinforcing steel bars between the anti-floating reinforcing steel bars and the reinforcing steel bar of the lower part of the slab, preventing the thin-wall square box from moving upwards, installing positioning reinforcing steel bars at two sides of the thin-wall square box, connecting the lower reinforcing steel bar of the positioning reinforcing steel bar at the lower end of the positioning reinforcing steel bar and the, the first time of distributing the concrete reaches 1/3 of the height of the core mould box body, and the second time of distributing the concrete is carried out before the concrete is initially set; the height of the concrete distributed for the second time reaches 2/3 of the height of the core mould box body, and the concrete is distributed for the third time before the concrete is initially set; and (5) distributing for the third time, namely pouring the concrete to the elevation of the top of the designed slab.
According to the scheme provided by the invention, the thin-wall box body can be bound with the steel bars in the garage top plate, the thin-wall box body is completely fixed, horizontal and vertical displacement is not generated, the structure is uniformly distributed, the stress is balanced, and the force bearing effect is good. Especially for with the scheme that records in the background art, can place a plurality of thin wall boxes simultaneously, then combine together with the roof reinforcing bar fast, the efficiency of construction is high. The concrete is poured for three times, so that the influence of buoyancy on the thin-wall box body is reduced, the floating amplitude of the thin-wall box body is reduced to the minimum range, and the construction quality is ensured.
Drawings
FIG. 1 is a final structural diagram of the construction method of the present invention
FIG. 2 is a schematic diagram showing the position relationship between the anti-floating steel bars and the thin-wall square box
FIG. 3 is a schematic view showing the positional relationship between the upper portion reinforcing bars and the upper portion reinforcing bars
FIG. 4 is a schematic view of a first stage pouring structure of concrete
FIG. 5 is a schematic view of a second stage pouring structure of concrete
FIG. 6 is a schematic diagram of a concrete third-stage pouring structure
In the figure: 1-plate upper reinforcing steel bar, 2-anti-floating reinforcing steel bar, 3-tensile reinforcing steel bar, 4-thin-wall square box, 5-positioning reinforcing steel bar, 6-anti-floating iron wire, 7-template bracket, 8-floor template, 9-positioning split heads and 10-plate lower reinforcing steel bar.
Detailed Description
As shown in fig. 1, a construction method for accurately positioning a hollow floor slab without a rib by a thin-wall square box comprises the steps of firstly, erecting a template support 7, fixing a floor slab template 8 on the template support 7, and accurately measuring and placing positioning points and lines of the thin-wall square box on the erected floor slab template by using a total station and a level gauge; then, the steel bars 10 at the lower part of the plate are bound, after the steel bars 10 at the lower part of the plate and the hidden beam steel bars are bound, the anti-floating iron wires 6 are distributed, 14# iron wires are preferably used for the anti-floating iron wires 6, and the distance is preferably 800-1200 mm. The anti-floating iron wire 6 penetrates through the floor formwork to firmly bind the reinforcing steel bars at the lower part of the slab with the formwork support 7;
a core mold positioning split heads 9 is arranged above the floor formwork 8, the positioning split heads 9 are made of cold-drawn steel wires with the diameter of 4mm, and the specific size is determined according to the actual engineering. After the positioning split heads 9 are placed, binding wires are used for firmly binding the positioning split heads 9 with the lower plate reinforcing steel bars 10 of the floor formwork, so that displacement is prevented;
as shown in fig. 2, a plurality of thin-wall square boxes 4 are arranged on a positioning split heads, anti-floating reinforcing steel bars 2 are arranged on the thin-wall square boxes 4, the anti-floating reinforcing steel bars 2 are two (or more than two, the distance is determined according to the size of a core mold and should not exceed 500 mm), the anti-floating reinforcing steel bars 2 are arranged at the tops of the thin-wall square boxes 4 in parallel, and tensile reinforcing steel bars 3 made of round steel drag hooks with the diameter of 6mm are used for connecting lower-plate reinforcing steel bars 10 with the anti-floating reinforcing steel bars 2, the drag hooks are arranged in a manner of being attached to the thin-wall square boxes, two drag hooks are respectively arranged on two sides of each thin-wall square box and are;
as shown in fig. 3, then, the upper reinforcing steel bar 1 is installed, the plate reinforcing steel bar drag hook is made into a positioning reinforcing steel bar 5, the positioning reinforcing steel bar 5 is tightly attached to the thin-wall square box 4 along the direction perpendicular to the anti-floating reinforcing steel bar and is fixed by binding wires, the upper end of the positioning reinforcing steel bar 5 is connected with the upper reinforcing steel bar 1 of the plate, the lower reinforcing steel bar 10 of the positioning reinforcing steel bar 5 and the lower reinforcing steel bar of the plate are fixed and clamped by the drag hook on the positioning reinforcing steel bar, and the drag hook ensures that the anti-floating reinforcing steel;
finally, concrete is poured, the concrete is distributed and poured for three times, as shown in figure 4, the concrete height of the first distribution reaches 1/3 of the height of the core mould box body, as shown in figure 5, and the second distribution is carried out before the concrete is initially set; the second time the concrete level reaches 2/3 the height of the mandrel box, as shown in fig. 6, the third time of distribution is completed before the concrete is initially set; and (5) distributing for the third time, namely pouring the concrete to the elevation of the top of the designed slab.
Claims (5)
1. A thin-wall square box rib-free precise positioning hollow floor construction method is characterized in that: the method comprises the following steps: building a template support, fixing a floor formwork on the template support, and accurately measuring and placing positioning points and lines of the thin-wall square box on the erected floor formwork by adopting a total station and a level gauge; binding the lower reinforcing steel bar of the plate and the reinforcing steel bar of the hidden beam, arranging an anti-floating iron wire after binding the lower reinforcing steel bar of the plate and the reinforcing steel bar of the hidden beam, enabling the anti-floating iron wire to penetrate through the floor formwork, connecting the upper end of the anti-floating iron wire with the reinforcing steel bar at the lower part, connecting the lower end of the anti-floating iron wire with the formwork support, a plurality of core mold positioning split heads are arranged on the floor formwork, and the split heads are firmly bound with the bottom reinforcing steel bars by binding wires to prevent displacement, placing a thin-wall square box at the determined position, arranging anti-floating reinforcing steel bars above the thin-wall square box, arranging tensile reinforcing steel bars between the anti-floating reinforcing steel bars and the reinforcing steel bars at the lower part of the plate to prevent the thin-wall square box from moving upwards, positioning steel bars are arranged on two sides of the thin-wall square box, the lower ends of the positioning steel bars are connected with lower steel bars of a connecting plate, upper steel bars of the mounting plate, and the positioning steel bars are connected with the steel bars on the upper part of the slab, the positioning steel bars clamp and fix the thin-wall square box in the horizontal direction, so that transverse displacement is prevented, and finally concrete is poured.
2. The construction method of the thin-wall square-box rib-free precise positioning hollow floor system according to claim 1, is characterized in that: the concrete is distributed and poured for three times, the concrete height of the first distribution reaches 1/3 of the height of the core mould box body, and the second distribution is carried out before the initial setting of the concrete; the height of the concrete distributed for the second time reaches 2/3 of the height of the core mould box body, and the concrete is distributed for the third time before the concrete is initially set; and (5) distributing for the third time, namely pouring the concrete to the elevation of the top of the designed slab.
3. The construction method of the thin-wall square-box rib-free precise positioning hollow floor system according to claim 1, is characterized in that: the anti-floating steel bars are arranged on the thin-wall square box 4 in parallel at intervals of not more than 500 mm.
4. The construction method of the thin-wall square-box rib-free precise positioning hollow floor system according to claim 1, is characterized in that: tensile reinforcing bar 3 make for diameter 6 mm's round steel both ends drag hook to be connected with board lower part reinforcing bar 10 and anti-floating reinforcing bar 2 through the drag hook.
5. The construction method of the thin-wall square-box rib-free precise positioning hollow floor system according to claim 1, is characterized in that: the positioning steel bars are made of hooks at two ends of the plate steel bars and are connected with the steel bars on the upper part of the upper plate of the steel bars on the lower part of the plate through the hooks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911243980.7A CN111058561A (en) | 2019-12-06 | 2019-12-06 | Construction method for thin-wall square box rib-free accurate positioning hollow floor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911243980.7A CN111058561A (en) | 2019-12-06 | 2019-12-06 | Construction method for thin-wall square box rib-free accurate positioning hollow floor |
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| CN111058561A true CN111058561A (en) | 2020-04-24 |
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| CN201911243980.7A Pending CN111058561A (en) | 2019-12-06 | 2019-12-06 | Construction method for thin-wall square box rib-free accurate positioning hollow floor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175144A (en) * | 2021-04-06 | 2021-07-27 | 湖北省工业建筑集团有限公司 | Construction method of GBF high-strength alloy thin-wall square-box hollow floor |
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| CN202380618U (en) * | 2011-07-26 | 2012-08-15 | 广州市第一建筑工程有限公司 | Device used for positioning thin-wall square boxes in hollow floor framework |
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| CN107327064A (en) * | 2016-04-29 | 2017-11-07 | 上海宝冶集团有限公司 | Thin-walled square chest anti-float method in arch without beam |
| CN108756037A (en) * | 2018-06-01 | 2018-11-06 | 平煤神马建工集团有限公司 | A kind of mounting structure of the whole anti-floating of GBF square chests cassette ceiling |
| CN108930409A (en) * | 2018-08-31 | 2018-12-04 | 中冶建工集团有限公司 | Conducive to the construction method for guaranteeing cassette ceiling structure size |
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2019
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Patent Citations (11)
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| CN201424728Y (en) * | 2009-05-26 | 2010-03-17 | 内蒙古兴泰建筑有限责任公司 | Cast-in-situ concrete hollow floorslab of thin-wall box body |
| KR20100065245A (en) * | 2010-02-05 | 2010-06-16 | 아이앤티엔지니어링(주) | 2-way light weight materials for constructing hollow core slab |
| CN102182313A (en) * | 2011-03-30 | 2011-09-14 | 中联世纪建设集团有限公司 | Anti-floating construction method of cast-in-situ concrete girderless hollow floor slab |
| CN202380618U (en) * | 2011-07-26 | 2012-08-15 | 广州市第一建筑工程有限公司 | Device used for positioning thin-wall square boxes in hollow floor framework |
| CN103290967A (en) * | 2013-06-28 | 2013-09-11 | 中国建筑第四工程局有限公司 | Multi-ribbed hollow composite floor slab and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175144A (en) * | 2021-04-06 | 2021-07-27 | 湖北省工业建筑集团有限公司 | Construction method of GBF high-strength alloy thin-wall square-box hollow floor |
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Application publication date: 20200424 |
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