CN113389379A - Construction method of post-cast strip floor with independent support - Google Patents
Construction method of post-cast strip floor with independent support Download PDFInfo
- Publication number
- CN113389379A CN113389379A CN202110709086.5A CN202110709086A CN113389379A CN 113389379 A CN113389379 A CN 113389379A CN 202110709086 A CN202110709086 A CN 202110709086A CN 113389379 A CN113389379 A CN 113389379A
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- China
- Prior art keywords
- post
- cast strip
- floor slab
- vertical support
- concrete
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- 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
-
- 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
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
-
- 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
- E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
- E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
A construction method of a post-cast strip floor slab with independent support aims to overcome the technical defects of high construction cost, long service cycle of a template and the like, and comprises the following steps: the method comprises the steps of setting a bottom template vertical support system, setting a group of vertical support PVC pipes at the connecting end of a floor slab and a post-cast strip, communicating the upper ends of the PVC pipes with a floor slab casting area, casting concrete of the floor slab and filling concrete in the PVC pipes, after concrete curing is finished, removing the vertical support system, supporting the connecting end of the cast floor slab and the post-cast strip by vertical support PVC pipe concrete columns, building a post-cast strip casting template again and casting concrete of the post-cast strip, and removing all templates, the PVC pipes and the concrete in the PVC pipes after the post-cast strip concrete curing is finished. The beneficial effects are that: the service cycle of the template and the supporting rods thereof is reduced, and the structure quality is ensured. The cost is saved by more than 20%.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of a post-cast strip floor slab with independent support.
Background
Because the interval time between the concrete pouring of the floor slab and the post-pouring strip is long, the formwork supporting mode of the concrete pouring of the floor slab and the post-pouring strip at present mainly adopts two modes, one mode is that the floor slab and the post-pouring strip are supported together, in order to quicken the service cycle of a formwork and reduce the use cost of the formwork, the formwork is dismantled after the floor slab pouring and curing is completed and before the post-pouring strip is poured, and the mode of re-supporting (back jacking) the joint of the floor slab and the post-pouring strip (namely the cantilever end of the floor slab) while dismantling is adopted during the formwork dismantling, but the stress requirement cannot be met due to untimely re-supporting (back jacking) or re-supporting (back jacking), so that the stress requirement of the structure at the joint of the floor slab and the post-pouring strip (namely the cantilever end of the floor slab) is difficult to meet.
The other mode is to prevent the former situation from occurring, an independent template supporting system is used in the post-cast strip area, the post-cast strip area is not removed when the template and the support are removed, and the original template support is reserved. The materials such as the template, the square timber, the jacking and the like are easy to deform, rot, rust and the like, so that the template supporting system of the post-pouring belt is loosened. The frame body upright stanchion and the horizontal pole are dense, so that a construction channel is blocked, secondary structure construction is influenced, and the overall attractiveness is poor.
Disclosure of Invention
In order to overcome the technical defects of high construction cost, long service cycle of a template and the like of the two formwork supporting modes of concrete pouring of the floor slab and the post-cast strip in the prior art, the invention discloses a construction method for the floor slab with the independent support post-cast strip.
The invention realizes the purpose of a construction method of a post-cast strip floor slab with independent support, and the construction method is realized by adopting the following steps:
step 3, arranging a bottom formwork batten and a bottom formwork on the vertical support system, wherein the group of vertical support PVC pipes penetrate through the bottom formwork, and the upper ends of the group of vertical support PVC pipes are communicated with a floor slab pouring area;
and 8, after the post-cast strip concrete is cured, removing the re-built post-cast strip casting template, the vertical support system, the vertical support PVC pipe and the concrete in the PVC pipe.
The invention has the beneficial effects that: the service cycle of the template and the supporting rods thereof is greatly reduced, and when the structural strength of the floor reaches the design or standard requirement, the vertical supporting system of the precast floor slab and the post-cast strip casting template, the bottom template battens, the precast floor slab and the post-cast strip casting bottom template are removed. Only the support formed by the vertical support PVC pipe for the connecting end of the floor slab and the pre-cast post-cast strip is reserved. The structure stress is not affected, and the structure quality is ensured. The cost is saved by more than 20 percent through the calculation of the construction case. The bottom template of the post-cast strip can be detached in advance, so that sundries are prevented from being accumulated in the post-cast strip, the chiseling cleaning of construction joints on two sides of the post-cast strip is facilitated, the reinforcing steel bars are adjusted before the post-cast strip is poured, and the pouring quality of the post-cast strip is guaranteed. And the civilized construction is ensured. Adopt independent support system of PVC pipe die can avoid support body pole setting and horizon bar intensive, the stay of the construction passageway of being convenient for is established, does not influence secondary structure construction, and the atmosphere is pleasing to the eye, guarantees civilized construction. The invention is suitable for post-cast strip construction in general industrial and civil buildings.
The present invention will be described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of a support structure for concrete in a PVC pipe.
FIG. 3 is a schematic view of FIG. 2A-A.
FIG. 4 is a schematic diagram of a structure of a post-cast strip covering a protection cover.
In the attached drawing, 1, a floor slab, 2, a post-cast strip, 4, a vertical support system, 5, a vertical support PVC pipe, 6, a bottom template batten, 7, a bottom template, 8, a pouring reserved template, 9, a protective cover plate and 10, a stable hanging seat.
Detailed Description
Referring to the attached drawings, the construction method of the post-cast strip floor slab with the independent support is realized by the following steps.
And 2, in the vertical support system 4, uniformly arranging a group of vertical support PVC pipes 5 along the length direction of the post-cast strip 2 according to the designed distance at the connecting end of the floor slab 1 and the post-cast strip 2.
A group of vertical support PVC pipes 5 are fixedly connected with a vertical support system 4, and the vertical support PVC pipes 5 are arranged to be simultaneously cast on auxiliary support columns at the connecting ends of the floor slab 1 and the post-cast strip 2 during concrete casting of the floor slab 1.
And 3, arranging a bottom formwork batten 6 and a bottom formwork 7 on the vertical support system 4, wherein the group of vertical support PVC pipes 5 penetrate through the bottom formwork 7, and the upper ends of the group of vertical support PVC pipes 5 are communicated with the floor slab 1 pouring area.
And 4, arranging a pouring reserved template 8 of the post-pouring belt 2 on the bottom template 7.
And 5, implementing concrete pouring of the floor slab 1 and filling concrete in the vertical support PVC pipe 5.
And 6, after concrete of the poured floor slab 1 and concrete in the vertical support PVC pipes 5 are cured, the vertical support system 4, the bottom template battens 6, the bottom template 7 and the post-cast strip pouring reserved template 8 are removed, and the connecting ends of the poured floor slab 1 and the post-cast strip 2 are supported by concrete columns in the vertical support PVC pipes 5.
And 7, building the pouring template and the vertical support system of the post-cast strip 2 again and pouring concrete of the post-cast strip 2.
And 8, after the concrete curing of the post-cast strip 2 is finished, removing the re-built post-cast strip 2 casting template and the concrete in the vertical support system, the vertical support PVC5 pipe and the PVC pipe 5.
In the embodiment of the invention, after the bottom template battens 6, the bottom template 7, the pouring reserved template 8 and the vertical support system 4 are removed in the step 6, the post-cast strip covering protective cover plate 9 is built on the area of the post-cast strip 2. And the potential safety hazard of the post-cast strip 2 area is eliminated.
In the embodiment of the invention, the method for dismantling the vertical support PVC pipe 5 and the concrete in the PVC pipe 5 comprises the following steps: and after PVC pipe fragments are recovered by cutting the PVC pipe 5, cutting the concrete upright post in the PVC pipe 5.
In the embodiment of the invention, in order to increase the stability of the PVC pipe 5, the top of the vertical support PVC pipe 5 is provided with the stable hanging seat 10, the stable hanging seat 10 is sleeved on the PVC pipe 5, and the upper surface of the stable hanging seat 10 is fixed with the bottom template 7.
In the embodiment of the invention, the diameter of the vertical support PVC pipe 5 is more than 150 mm. And the uniform filling of the concrete in the PVC pipe 5 is ensured.
In the embodiment of the invention, a steel reinforcement cage is arranged in the vertical support PVC pipe 5. The support strength of the concrete support column formed in the PVC pipe 5 is ensured.
Economic benefits of embodiments of the invention
The PVC pipe die is adopted for independent support, a large amount of materials such as steel pipes do not need to be occupied for a long time, the turnover efficiency of the support frame material is improved, and the PVC pipe die has high economic benefits. Taking a certain project as an example, the length of a post-cast strip of a top plate of a basement is 783 meters, a PVC pipe die supporting column is averagely arranged every 3 meters, the number of the PVC pipe die supporting columns is 260, the height of the PVC pipe die supporting column is 3 meters, and the economic benefit analysis is shown in the following table.
Economic benefit analysis meter
To sum up, the total number of the sites for flashing construction according to the engineering requirement is about 1750m, and the total cost is saved by 93960-74762.2-19197.8 yuan.
Social benefits of the invention
1. When the PVC pipe die independent support construction is adopted, the bottom template of the post-cast strip can be detached in advance, sundries are prevented from being accumulated in the post-cast strip, the steel bar is adjusted before chiseling and cleaning of construction joints on two sides of the post-cast strip and pouring of the post-cast strip are facilitated, and the pouring quality of the post-cast strip is guaranteed.
2. Because the time that the post-cast strip is kept somewhere is generally very long, adopt traditional support system, the rotten, the deformation of different degrees all can be produced to template, the stupefied square timber of back of the body etc. and also can produce phenomenons such as corrosion, deformation, smooth silk, easily causes post-cast strip template support system not hard up, warp, causes the accumulative deformation of cantilever floor, produces the crack. Before the concrete of the post-cast strip is poured, the damaged material needs to be replaced, and the quality safety of the post-cast strip cannot be ensured after the formwork support at the post-cast strip is removed or replaced. Adopt the independent support of PVC pipe die can effectively solve above-mentioned problem, and the independent support of PVC pipe die can not artificially be demolishd, guarantees safety.
3. Adopt independent support system of PVC pipe die can avoid support body pole setting and horizon bar intensive, the stay of the construction passageway of being convenient for is established, does not influence secondary structure construction, and the atmosphere is pleasing to the eye, guarantees civilized construction.
4. The PVC pipe die is adopted for independent support, a large amount of materials such as steel pipes do not need to be occupied for a long time, the turnover efficiency of the support frame material is improved, and the PVC pipe die has high economic benefits.
The invention is energy-saving and environment-friendly
1. After the post-cast strip is constructed, the PVC pipe die can be dismantled, and the dismantled material can be used for preparing sponge bodies and foamed ceramic products in sponge urban facilities.
2. Adopt independent support system of PVC pipe die can avoid support body pole setting and horizon bar intensive, what be convenient for the construction passageway stays establishes, practices thrift the construction land used.
Claims (6)
1. A construction method of a post-cast strip floor slab with independent support is characterized in that: the independent support construction method is realized by the following steps:
step 1, arranging a floor slab (1) and a bottom template (7) of a post-cast strip (2) to form a vertical supporting system (4);
step 2, in the vertical supporting system (4), a group of vertical supporting PVC pipes (5) are uniformly distributed and arranged at the connecting end of the floor slab (1) and the post-cast strip (2) according to the designed distance along the length direction of the post-cast strip (2);
step 3, arranging a bottom template batten (6) and a bottom template (7) on the vertical support system (4), wherein the group of vertical support PVC pipes (5) penetrate through the bottom template (7), and the upper ends of the group of vertical support PVC pipes (5) are communicated with the building area of the floor slab casting (1);
step 4, arranging a pouring reserved template (8) of the post-pouring belt (2) on the bottom template (7);
step 5, implementing concrete pouring of the floor slab (1) and filling of concrete in the vertical support PVC pipe (5);
step 6, after concrete of the poured floor slab (1) and concrete in the vertical support PVC pipe (5) are cured, removing the vertical support system (4), the bottom template batten (6), the bottom template (7) and the post-cast strip pouring reserved template (8), and enabling the connection end of the poured floor slab (1) and the post-cast strip (2) to vertically support the support structure of the concrete upright column in the PVC pipe (5);
step 7, building the pouring template and the vertical support system of the post-cast strip (2) again and pouring concrete of the post-cast strip (2);
and 8, after the concrete curing of the post-cast strip (2) is finished, dismantling the re-built post-cast strip (2) casting template and the vertical support system, the vertical support PVC (5) pipe and the concrete in the PVC pipe (5).
2. A method of constructing a post-cast floor slab with independent bracing according to claim 1, wherein: and in the step 6, after the bottom template battens (6), the bottom template (7), the pouring reserved template (8) and the vertical support system (4) are dismantled, a post-cast strip covering protective cover plate (9) is built on the post-cast strip (2) area.
3. A construction method for a post-cast floor slab with independent support according to claim 1 or 2, characterized in that: the method for dismantling the vertical support PVC pipe (5) and the concrete in the PVC pipe (5) comprises the following steps: and after PVC pipe fragments are recovered by cutting the PVC pipe (5), cutting the concrete upright post in the PVC pipe (5).
4. A construction method for a post-cast floor slab with independent support according to claim 1 or 2, characterized in that: the top of the vertical support PVC pipe (5) is provided with a stable hanging seat (10), the stable hanging seat (10) is sleeved on the PVC pipe (5), and the upper surface of the stable hanging seat (10) is fixed with the bottom template (7).
5. A construction method for a post-cast floor slab with independent support according to claim 1 or 2, characterized in that: the diameter of the vertical support PVC pipe (5) is more than 150 mm.
6. A construction method for a post-cast floor slab with independent support according to claim 1 or 2, characterized in that: and a reinforcement cage is arranged in the vertical support PVC pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110709086.5A CN113389379A (en) | 2021-06-25 | 2021-06-25 | Construction method of post-cast strip floor with independent support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110709086.5A CN113389379A (en) | 2021-06-25 | 2021-06-25 | Construction method of post-cast strip floor with independent support |
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| Publication Number | Publication Date |
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| CN113389379A true CN113389379A (en) | 2021-09-14 |
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| CN202110709086.5A Pending CN113389379A (en) | 2021-06-25 | 2021-06-25 | Construction method of post-cast strip floor with independent support |
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Cited By (3)
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| CN115110646A (en) * | 2022-07-01 | 2022-09-27 | 广东正升建筑有限公司 | Post-cast strip construction process |
| CN115110530A (en) * | 2022-08-22 | 2022-09-27 | 浙江交工集团股份有限公司 | Construction method of ultra-deep foundation pit reinforced concrete support dismantling structure |
| CN115652997A (en) * | 2022-11-10 | 2023-01-31 | 中建八局第二建设有限公司 | Rapid backfill construction method for single-span basement fertilizer groove separated by post-cast strip |
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| CN115110646A (en) * | 2022-07-01 | 2022-09-27 | 广东正升建筑有限公司 | Post-cast strip construction process |
| CN115110530A (en) * | 2022-08-22 | 2022-09-27 | 浙江交工集团股份有限公司 | Construction method of ultra-deep foundation pit reinforced concrete support dismantling structure |
| CN115110530B (en) * | 2022-08-22 | 2024-04-26 | 浙江交工集团股份有限公司 | Reinforced concrete support dismantling structure for ultra-deep foundation pit and construction method thereof |
| CN115652997A (en) * | 2022-11-10 | 2023-01-31 | 中建八局第二建设有限公司 | Rapid backfill construction method for single-span basement fertilizer groove separated by post-cast strip |
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