CN1295408C - Construction for steel bar reinforced hollow concrete roof cast-in-situs - Google Patents
Construction for steel bar reinforced hollow concrete roof cast-in-situs Download PDFInfo
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- CN1295408C CN1295408C CNB2005100311374A CN200510031137A CN1295408C CN 1295408 C CN1295408 C CN 1295408C CN B2005100311374 A CNB2005100311374 A CN B2005100311374A CN 200510031137 A CN200510031137 A CN 200510031137A CN 1295408 C CN1295408 C CN 1295408C
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- steel bar
- internal mold
- reinforcing bar
- reinforced hollow
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Abstract
The present invention relates to the building field, particularly to a construction method for cast-in-situ steel bar hollow concrete roofs, which comprises the following steps: laying a mould plate; placing plate bottom steel bars; setting out and placing an internal mould; installing a fixed support, and connecting and fixing the internal mould and the bottom steel bars; placing plate top steel bars and connection steel bars; casting and maintaining concrete. If necessary, pre-stress can be applied to partial steel bars, and self-compaction concrete can be utilized. Consequently, the present invention uses the technologies of the fixed support, the pre-stress, the self-compaction concrete, etc., and therefore, the construction is convenient, and the work efficiency is high. Especially the internal mould installation is convenient, and the localization is accurate. The present invention not only enhances the installation efficiency of the internal mould and simultaneously increases the anti-floating ability of the internal mould in the construction. Moreover, the cost is saved. The present invention can be widely used for steel bar concrete structures.
Description
Technical field:
The present invention relates to building field, refer to a kind of job practices of steel bar reinforced hollow concrete roof cast-in-situs especially.
Background technology:
The making of steel bar reinforced hollow concrete roof cast-in-situs at present all is by hollow or solid internal mold (or claiming core) is set in concrete, then when arriving suitable intensity, extracts the concrete setting and harden internal mold out, reinforced concrete hollow floorslab has been owing to reduced the consumption of concrete and the deadweight of structure, thereby widely in the application project structure.But the internal mold of using on the engineering is a kind of thin wall cylinder structure, is made up of pipe and two plugs, will adopt immobilization material that internal mold is fixed in construction, is not shifted in work progress to guarantee internal mold.Owing to need to be provided with connecting elements or immobilization material in the work progress, as tying up the anti-floating reinforcing bar on the core pipe and with measures such as iron wire are fixing.It is very inconvenient to construct, and construction efficiency is low, the cost height, easily be shifted owing to internal mold anti-floating ability simultaneously, and do not have the location measure that leans on, internal mold is difficult to accurately locate by designing requirement, cause rib of slab sectional dimension error bigger, have a strong impact on the stress performance of hollow building cover structure.
Summary of the invention:
Technical problem to be solved by this invention is: at the deficiencies in the prior art, provide a kind of use dedicated fixed support, make internal mold easy for installation, accurate positioning, the job practices of the steel bar reinforced hollow concrete roof cast-in-situs that the anti-floating ability of internal mold is strong in the construction.
In order to solve the problems of the technologies described above, the present invention proposes a kind of job practices of steel bar reinforced hollow concrete roof cast-in-situs, it is characterized in that its construction sequence is:
A, laying template;
Reinforcing bar at the bottom of b, the placing plate;
C, unwrapping wire marks the installation site of internal mold on reinforcing bar at the bottom of bed die, the plate;
D, lay internal mold, the installing fixed support;
E, reinforcing bar at the bottom of fixed support upper shed anchor clamps and the plate is connected and fixed;
F, placing plate top reinforcing bar and connecting reinforcement;
G, pour concrete, maintenance.
Described fixed support is provided with the anchor clamps of band opening, is the member that directly is connected with reinforcing bar.Described fixed support and internal mold are connected as a single entity, or are connected and fixed by hook or hanging ring and internal mold, and hook or hanging ring promptly are set on fixed support, will link up with or hanging ring is hooked on the internal mold, and internal mold and fixed support are linked together.In the construction, support bracket fastened opening anchor clamps are clamped on the reinforcing bar, and internal mold and reinforcing bar are connected and fixed.Described hook or hanging ring are U-shaped, circle, ellipse, square top and round bottom shape, polygon.Die topography is cylindrical shape, ellipse, polyhedron shape or cone-shaped in described, and inner membrance adopts hollow body or solid.Described internal mold axis direction is parallel to each other, vertical with the reinforcing bar direction or intersect.
Among the present invention, can apply prestressing force at the bottom of the part plate or plate top reinforcing bar and form prestressed structure.
Described concrete vibrates in casting process, or adopts self-compacting concrete, and promptly concrete need not vibrate in casting process.
Compared with prior art, advantage of the present invention is: owing to used fixed support, use technology such as prestressing force and self-compacting concrete simultaneously, make internal mold easy for installation, accurate positioning has not only improved the internal mold installation efficiency, has increased the anti-floating ability of internal mold in the construction simultaneously, and the saving cost, can be widely used in the reinforced concrete structure.
Description of drawings:
Fig. 1 is the perspective view of the embodiment of the invention.
Fig. 2 is the connection diagram of internal mold of the present invention and reinforcing bar.
Fig. 3-Fig. 6 is fixed support and hook or a hanging ring connection diagram among the present invention.
Fig. 7-Figure 14 is hook or a hanging ring embodiment schematic diagram among the present invention.
Figure 15-Figure 19 is an interior die topography schematic diagram among the present invention.
The figure number explanation:
1 soffit formwork, 2 side templates
Reinforcing bar 4 internal molds at the bottom of 3 plates
5 plate top reinforcing bar 6 fixed supports
7 opening anchor clamps, 8 concretes
9 connecting reinforcements, 10 hook or hanging rings
The specific embodiment:
As shown in Figures 1 and 2, in the present embodiment, template comprises soffit formwork 1 and side template 2, for the making of reinforced concrete floor provides the making platform, controls the shape and size of floor simultaneously.Template is fixed by they sup-port, and template can adopt punching block, bamboo mould or other composite shuttering.
Reinforcing bar is divided into reinforcing bar 3 and plate top reinforcing bar 5 at the bottom of the plate, be connected with connecting reinforcement 9 between reinforcing bar 3 and the plate top reinforcing bar 5 at the bottom of the plate, the formation cage of reinforcement that fuses can apply prestressing force by stretch-draw to the part reinforcing bar in case of necessity and form prestressed structure, and the span of plate and accommodation are increased.
In the installation of internal mold 4, can be on request on soffit formwork 1 and reinforcing bar 3 at the bottom of the plate unwrapping wire determine the position and the direction of internal mold 4, be the position mark position on reinforcing bar 3 at the bottom of soffit formwork 1 and the plate in advance of internal mold 4, then internal mold 4 installed exactly, so internal mold 4 accurate positionings.Internal mold 4 axis directions can be mounted to parallel to each other, vertical with 3 directions of reinforcing bar at the bottom of the plate or intersect.
As shown in Figure 2, an end of fixed support 6 has opening anchor clamps 7, is used to clamp reinforcing bar, and the shape of opening anchor clamps 7 can be circle, ellipse, flute profile or other shape.Fixed support 6 can be connected as a single entity with internal mold 4 or be connected by linking up with or enclosing 10.When fixed support 6 is connected as a single entity with internal mold 4, can directly place internal mold 4, with the opening anchor clamps 7 and reinforcing bar 3 clampings at the bottom of the plate of fixed support 6, internal mold 4 is connected with reinforcing bar at the bottom of the plate 3 again by the position of unwrapping wire location; Perhaps, hook is set on fixed support 6 or encloses 10,, fixed support 6 and internal mold 4 are connected as a single entity earlier with hook or enclose 10 internal mold 4 hooked as Fig. 3-shown in Figure 6.Then press the position of unwrapping wire location, with support bracket fastened opening anchor clamps 7 and reinforcing bar 3 clampings at the bottom of the plate, by fixed support 6 internal mold 4 and reinforcing bar 3 at the bottom of the plate are connected and fixed like this, internal mold can accurately be located by designing requirement, the construction efficiency height, installation cost is low, while is owing to internal mold and reinforcing bar connecting and fixing, in the process of pour concrete, internal mold can not float, and the anti-floating ability of internal mold is strengthened.
Described hook or hanging ring are U-shaped, circle, ellipse, square top and round bottom shape, polygon or other abnormity, see Fig. 7-Figure 14.
Described internal mold 4 profiles are cylindrical shape, elliptical cylinder, square top and round bottom cylindrical shell, cone-shaped, polyhedron shape, and as Figure 15-shown in Figure 19, the cylindrical shell cross sectional shape is circle, ellipse, square top and round bottom shape, polygon.Wherein internal mold adopts solid and hollow body.
In the casting process of concrete, employing is vibrated; Adopt self-compacting concrete, be shaped and closely knit, need not vibrate by the high fluidity of concrete, construct easier reliably, construct.
Reinforcing bar 3 at the bottom of the part plate or plate top reinforcing bar 5 are applied prestressing force formation prestressed structure, and prestressing force is before the concrete cast or pour into a mould after-applied.
Its construction sequence is: lay template; Reinforcing bar 3 at the bottom of the placing plate; Unwrapping wire marks the installation site of internal mold on reinforcing bar at the bottom of bed die, the plate; Lay internal mold 4, installing fixed support 6; Reinforcing bar 3 at the bottom of fixed support upper shed anchor clamps and the plate is connected and fixed; Placing plate top reinforcing bar 5 and connecting reinforcement 9; Pour concrete 8, maintenance.
Claims (11)
1, a kind of job practices of steel bar reinforced hollow concrete roof cast-in-situs is characterized in that: the steps include:
A, laying template;
Reinforcing bar at the bottom of b, the placing plate;
C, unwrapping wire marks the installation site of internal mold on reinforcing bar at the bottom of bed die, the plate; Lay internal mold, the installing fixed support;
D, reinforcing bar at the bottom of fixed support upper shed anchor clamps and the plate is connected and fixed;
E, placing plate top reinforcing bar and connecting reinforcement;
F, pour concrete, maintenance.
2, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 is characterized in that: the opening anchor clamps are set on the described fixed support, by anchor clamps clamping reinforcing bar internal mold and reinforcing bar are connected and fixed.
3, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 or 2 is characterized in that: described fixed support and internal mold are connected as a single entity.
4, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 or 2 is characterized in that: described fixed support and hook or hanging ring are connected as a single entity, and fixed support is connected with internal mold by hook or hanging ring.
5, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 4 is characterized in that: described hook or hanging ring be shaped as U-shaped, circle, ellipse, square top and round bottom shape or polygon.
6, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 or 2 is characterized in that: described opening anchor clamps have opening, and this opening is circle, ellipse, polygon or notch shape.
7, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 or 2 is characterized in that: described internal mold adopts hollow body or solid, and interior die topography is cylindrical shape, cone-shaped or polyhedron shape.
8, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 is characterized in that: in b and f step the part reinforcing bar is applied prestressing force and form prestressed structure.
9, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 is characterized in that: the axis direction of described internal mold is set to parallel to each other, vertical with reinforcing bar direction at the bottom of the plate or intersects.
10, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 is characterized in that: concrete vibrates in casting process in the described g step.
11, the job practices of steel bar reinforced hollow concrete roof cast-in-situs as claimed in claim 1 is characterized in that: concrete adopts self-compacting concrete in the described g step, and concrete need not to vibrate in casting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100311374A CN1295408C (en) | 2005-01-12 | 2005-01-12 | Construction for steel bar reinforced hollow concrete roof cast-in-situs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100311374A CN1295408C (en) | 2005-01-12 | 2005-01-12 | Construction for steel bar reinforced hollow concrete roof cast-in-situs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1644835A CN1644835A (en) | 2005-07-27 |
| CN1295408C true CN1295408C (en) | 2007-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100311374A Expired - Fee Related CN1295408C (en) | 2005-01-12 | 2005-01-12 | Construction for steel bar reinforced hollow concrete roof cast-in-situs |
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| CN (1) | CN1295408C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818574A (en) * | 2010-03-23 | 2010-09-01 | 南通宏华建筑安装有限公司 | Construction method for self-stable high-strength thin-wall pipe internal mold cast-in-place hollow slab |
| CN101824865B (en) * | 2010-04-21 | 2012-11-28 | 中南大学 | Cast-in-place reinforced concrete hollow 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 |
| CN102765132A (en) * | 2012-07-06 | 2012-11-07 | 中元建设集团股份有限公司 | Hollow slab beam air inflation capsule anti-floating rib |
| CN103266704B (en) * | 2013-05-31 | 2015-05-27 | 佛山市班高得节能建工科技有限公司 | Hollow floor slab and construction method thereof |
| CN104563392B (en) * | 2014-10-31 | 2016-08-24 | 华南理工大学 | The regenerative mixed beam of a kind of built-in box shaped steel and construction technology thereof |
| CN105604317B (en) * | 2016-02-24 | 2018-02-06 | 广东省建筑设计研究院 | A kind of thin-walled square chest hollow floor core and its anti-float method |
| CN105625620B (en) * | 2016-03-11 | 2017-08-29 | 中国五冶集团有限公司 | A kind of cored slab built-in mould square box gripping mechanism |
| CN109577647A (en) * | 2018-12-11 | 2019-04-05 | 山东建筑大学 | One kind is from anti-floating plastics diaphragm capsule and construction method |
| CN111622408B (en) * | 2020-04-21 | 2021-11-16 | 上海二十冶建设有限公司 | Hollow floor system using cylindrical mold core and matched filling device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297095A (en) * | 1999-11-22 | 2001-05-30 | 邱则有 | In-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and its construction method |
-
2005
- 2005-01-12 CN CNB2005100311374A patent/CN1295408C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297095A (en) * | 1999-11-22 | 2001-05-30 | 邱则有 | In-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and its construction method |
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| CN1644835A (en) | 2005-07-27 |
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