CN212001878U - Prefabricated floor slab with non-stripping mold - Google Patents
Prefabricated floor slab with non-stripping mold Download PDFInfo
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- CN212001878U CN212001878U CN201921716495.2U CN201921716495U CN212001878U CN 212001878 U CN212001878 U CN 212001878U CN 201921716495 U CN201921716495 U CN 201921716495U CN 212001878 U CN212001878 U CN 212001878U
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Abstract
The utility model discloses a precast floor slab without form removal, at least one end part of the precast floor slab is provided with a step-shaped gap, and the position of the step-shaped gap is provided with a form removal free part; exempt from the form stripping and include netted baffle and anchor muscle, the vertical place of netted baffle is anchored in the outside concrete of breach, and the anchor muscle is fixed on netted baffle, and the first end of anchor muscle is pre-buried in the precast concrete of precast floor slab, and the step-like breach is arranged in to the second end. In the scheme, the non-stripping mold is arranged at the notch, so that the non-stripping mold can serve as a side mold at the notch during production, and demolding is not needed; the strength of concrete at the notch can be improved without detaching the mould; the form-stripping-free concrete floor slab is provided with a plurality of fine through holes, the through holes can be used for discharging air inside concrete when the concrete vibrates in production, the compactness of the prefabricated floor slab is improved, and when cast-in-place concrete is poured at the gap on the construction assembly site, a rough surface is formed at the through holes, so that the anchoring force between the through holes and the cast-in-place concrete is improved.
Description
Technical Field
The utility model belongs to the technical field of the assembly type structure, specifically speaking, the utility model relates to a set up prefabricated floor who exempts from form removal.
Background
In the assembly type building, prefabricated components are transported to a construction site for assembly after being produced in a factory. For the production of the prefabricated part, firstly, arranging a side formwork on the outermost side of the enclosing side formwork on the surface of the platform formwork, then laying embedded steel bars on the surface of the platform formwork inside the side formwork, finally pouring concrete inside the side formwork, and removing the side formwork after curing and forming to obtain the prefabricated part. For some prefabricated parts with uneven outer ends (such as projections or grooves) and extending steel bars, the side forms need to be designed into corresponding shapes, and holes for extending the steel bars are reserved. This results in a complicated side form structure, increased cost, and complicated side form installation and demolding operation.
The prefabricated floor slab is required to be connected with the superposed beam, a step-shaped notch can be arranged on the end face of the prefabricated floor slab, then the bottom surface of the step-shaped notch is lapped on the top surface of the prefabricated part of the superposed beam on a construction site, finally cast-in-place concrete at the step-shaped notch and the cast-in-place part of the superposed beam is poured, and the prefabricated floor slab and the superposed beam are connected together. For the production of the floor slab with the stepped notch at the end part, the internal reinforcing steel bars of the prefabricated floor slab extend out of the stepped notch, so that the side forms at the end part are complex, the demoulding is troublesome, and the production efficiency is low. Therefore, there is a need to develop an efficient and low-cost precast floor slab with no form removal for this type of precast floor slab, so as to improve the production efficiency of the precast floor slab and reduce the production cost.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the prefabricated floor slab is provided with the detachment-free form, the detachment-free form can serve as a side form at the gap of the end part of the prefabricated floor slab during production, the side form becomes a part of the prefabricated floor slab during demolding, the detachment is not needed, and the local strength of the prefabricated floor slab is improved. The production method of the prefabricated floor slab with the non-stripping die is also improved, the complexity of the side die can be reduced, the production efficiency of the prefabricated floor slab is improved, and the production cost and the labor intensity of workers are reduced.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
a prefabricated floor slab provided with a form-removal-free structure is characterized in that at least one end of the prefabricated floor slab is provided with a step-shaped notch, and the step-shaped notch is provided with the form-removal-free structure; exempt from to tear open mould includes netted baffle and anchor muscle, netted baffle is vertical place and anchor in the outside concrete of breach, the anchor muscle is fixed on the netted baffle, just the first end of anchor muscle is pre-buried in the precast concrete of precast floor slab, the second end is arranged in the breach of step-like.
Preferably, the anchoring rib is a stirrup with one closed end or two closed ends, the vertical plane of the stirrup is placed and perpendicular to the net-shaped partition plate, and the closed end of the stirrup is arranged at the gap of the precast floor slab.
Preferably, the anchoring ribs are rectangular stirrups placed on a vertical plane.
Preferably, the upper horizontal steel bar of the rectangular stirrup is fixed in the net-shaped partition plate, and the lower horizontal steel bar of the rectangular stirrup is arranged below the net-shaped partition plate.
Preferably, reinforcing ribs are distributed on the reticular clapboard.
Preferably, the reinforcing ribs are a plurality of vertical ribs which are vertically distributed in the reticular clapboard and are parallel to each other; or at least one horizontal rib distributed horizontally in the mesh-like separator.
Preferably, the anchoring ribs are fixed to the reinforcing ribs.
The technical scheme of the utility model the beneficial technological effect who gains is:
1. the end part of the prefabricated floor slab in the scheme is provided with the step-shaped notch, the non-dismantling formwork is arranged at the notch, so that the non-dismantling formwork can serve as a side formwork at the notch during production, and the non-dismantling formwork is anchored in concrete at the notch without demoulding; the strength of concrete at the gap can be improved without disassembling the mould, and the gap is not easy to damage when the prefabricated floor slab is transported; meanwhile, the form-removal-free concrete floor is provided with a plurality of fine through holes, the through holes can be used for discharging air inside concrete when the concrete vibrates in production, the compactness of the prefabricated floor is improved, and when cast-in-place concrete is poured at the gap on the construction assembly site, a rough surface is formed at the through holes, so that the anchoring force between the through holes and the cast-in-place concrete is improved.
2. According to the production method of the prefabricated floor slab, the conventional side forms and the non-dismantling forms are used for producing the step-shaped notches, the operation is simple, the labor intensity of workers is low, and the production efficiency is high.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation.
Fig. 1 is a vertical cross-sectional view of a precast floor slab and a schematic view of a positional relationship between an anchoring bar and upper and lower layers of reinforcing mesh sheets in embodiment 1;
fig. 2 is a vertical cross-sectional view of the precast floor slab and a schematic view of a positional relationship between the anchoring bars and the upper and lower layers of reinforcing mesh sheets in embodiment 2;
FIG. 3 is a partial structural view of the mold removal-free structure in embodiment 2;
FIG. 4 is a table formwork with a non-dismantling formwork and a side formwork laid in the embodiment 2;
FIG. 5 is a table form of embodiment 2 laid with a side form, a lower layer reinforcing mesh and no form removal;
FIG. 6 is a schematic view showing a laying sequence of each part in the production process of a precast floor slab in example 2;
reference numerals: 1-prefabricated floor slab, 2-gap, 3-form removal free, 4-net-shaped partition plate, 5-anchoring rib, 51-upper horizontal reinforcing bar, 52-lower horizontal reinforcing bar, 6-reinforcing rib, 7-bench formwork, 8-side formwork, 9-upper layer reinforcing bar net piece and 10-lower layer reinforcing bar net piece.
Detailed Description
The present invention will be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
Referring to the schematic diagram of fig. 1, one side end surface of the precast floor slab of this embodiment is provided with a step-shaped gap, and the step-shaped gap is provided with a form-removal-free part; the non-dismantling mold comprises a net-shaped partition plate and anchoring ribs, the net-shaped partition plate is vertically placed and anchored in concrete on the outer side of the notch, the anchoring ribs are fixed on the net-shaped partition plate, the height of each anchoring rib is 10-14c, the first end of each anchoring rib is embedded in the precast concrete of the precast floor slab, and the second end of each anchoring rib is arranged in the step-shaped notch. The anchoring ribs are fixed on the net-shaped partition plate to form a form free of form removal, cutting and setting can be conducted according to the size of actual needs, one end of each anchoring rib is embedded in the precast concrete, and the effect of connecting new concrete and old concrete is achieved in cast-in-place concrete at the notches of one end of each anchoring rib.
With continued reference to fig. 1, the anchoring bar in this embodiment is shaped as an n-type with one open end and one closed end, wherein the closed bend is placed at the gap of the precast floor slab and the open end is anchored in the precast concrete. The prefabricated floor slab is provided with double-faced reinforcing mesh sheets, wherein the upper reinforcing mesh sheet is lapped above the anchoring ribs, the lower reinforcing mesh sheet is arranged below the anchoring ribs, one end of the lower reinforcing mesh sheet is anchored at the position of the bottom plate with the step-shaped notch, and the upper reinforcing mesh sheet does not exceed the step-shaped notch.
The prefabricated floor in this embodiment, through exempting from the form removal in breach department setting, the complexity of side forms when having reduced production has improved production efficiency, exempts from the local intensity of form removal anchor in breach department concrete after also the drawing of patterns to have improved the prefabricated floor, has reduced the concrete of breach department and has sent the damaged condition.
Example 2
Referring to fig. 2, the structure of the precast floor slab in this embodiment is substantially the same as that of the precast floor slab in embodiment 1, and a form-removal-free portion is provided at the step-shaped gap of the precast floor slab; the non-dismantling mould comprises a reticular clapboard and an anchoring rib. The differences are as follows: meanwhile, referring to fig. 3, the anchoring rib in the embodiment is a rectangular stirrup with two closed ends and placed on a vertical plane, and the rectangular stirrup is perpendicular to the mesh partition plate; the upper horizontal steel bar of the rectangular stirrup is fixed in the net-shaped partition plate, and the lower horizontal steel bar of the rectangular stirrup is arranged below the net-shaped partition plate. The anchoring ribs are arranged in a rectangular stirrup form, so that the strength of the anchoring ribs can be improved, and meanwhile, the anchoring force of the anchoring ribs in the precast concrete of the precast floor slab is enhanced, so that the integral strength of the precast floor slab is improved; arrange the lower horizontal reinforcement of rectangle reinforcing bar in the below of netted baffle, then place on the bench formwork when exempting from to tear open the mould and using, horizontal reinforcement and lower floor's reinforcing bar net piece down in addition between the bottom side of netted baffle and the bench formwork, consequently can have certain interval between netted baffle and the bench formwork surface, this interval is making the concrete of netted baffle one side flow to the opposite side, makes things convenient for the shaping of the breach of prefabricated floor.
Referring to fig. 2, the thickness of the prefabricated floor slab is about 15cm as a whole, and the thickness of the bottom plate at the stepped notch is about 3cm and the length is about 20 cm.
Referring to fig. 3, on the basis of the present embodiment, in another modification, two reinforcing ribs parallel to each other in the horizontal direction are distributed on the mesh-like separator, and the reinforcing ribs penetrate through the whole mesh-like separator. Can strengthen the intensity of netted baffle like this, and then strengthen the resistance to compression and the shock strength of exempting from to tear the form open, avoid when producing precast floor, exempt from to tear the form open and receive the lateral pressure of concrete and take place to warp and then cause the problem that precast floor production quality is poor. In other embodiments, a plurality of reinforcing ribs which are vertically distributed can also be adopted, and the plurality of reinforcing ribs are parallel to each other and are uniformly spaced; therefore, the strength of the net-shaped partition plate can be further improved, the possibility of discovering deformation in the using process is reduced, and the production quality of the prefabricated floor slab is ensured.
Referring to fig. 4 to 6, the method for producing a precast floor slab provided with a form removal free structure according to the embodiment includes the following steps:
s1, arranging a plurality of side forms on the bench formwork, arranging a lower layer of steel bar net piece on the surface of the bench formwork in the side forms, wherein the area of the lower layer of steel bar net piece is equal to the area of the enclosed areas of the side forms, and embedding the lifting appliance in the middle position of the enclosed areas of the side forms; the lower layer steel bar net piece is fixed on the surface of the bench formwork through the embedded support piece, and the distance between the lower layer steel bar net piece and the surface of the bench formwork is 2 cm;
s2, arranging an detachment-free mold on the inner side of a side mold with a preset step-shaped notch, placing a net-shaped partition plate in parallel with the side mold, placing an anchoring rib in a vertical plane and perpendicular to the net-shaped partition plate, placing the detachment-free mold above a lower layer of reinforcing mesh, wherein a distance of about 4cm exists between the detachment-free mold and the surface of a table mold, reserving a distance of 20cm between the side mold and the detachment-free mold, placing wood rods with the length of 20cm as supporting rods between the side mold and the detachment-free mold at intervals, enabling one end of each wood rod to be supported on the side mold, and enabling the other end of each wood rod to be supported on the net-shaped partition plate, so that the detachment-free mold is enabled not to deform and collapse in the;
s3, placing an upper layer of steel bar mesh on the top side of the non-dismantling mold, wherein the area of the upper layer of steel bar mesh is smaller than that of the lower layer of steel bar mesh, and the edge of the upper layer of steel bar mesh is flush with the net-shaped partition plate of the non-dismantling mold;
s4, pouring concrete inside the side forms, pouring a concrete layer with the thickness of about 2cm in the area between the non-demolition forms and the side forms, pouring concrete in the area covered by the upper layer of reinforcing mesh sheets, enabling the thickness of the concrete layer in the area covered by the upper layer of reinforcing mesh sheets to be about 15cm, vibrating the concrete, and curing and forming;
and S5, removing the side forms around the precast floor slab.
In other embodiments, when the mesh-like partition is provided with the reinforcing ribs, one end of the wood pole abuts against the reinforcing ribs.
In the embodiment, the detachment-free form is placed on the lower layer of the reinforcing mesh, so that a certain distance exists between the detachment-free form and the surface of the bench formwork. In the step S4, 2cm of bottom plate concrete with the step-shaped notch is poured first, then when concrete in the area covered by the upper layer of reinforcing mesh is poured, because the concrete has certain fluidity, the concrete at the position slowly flows into the area between the non-dismantling mold and the side mold from the gap between the non-dismantling mold and the surface of the bench mold in the pouring process, and finally the thickness of the bottom plate with the step-shaped notch is about 3cm, so that the concrete completely wraps and covers the lower layer of reinforcing mesh, and the strength requirement of the reinforced concrete is met.
The prefabricated floor slab in the embodiment can be produced by adopting the universal side forms, the side forms do not need to be modified, and the production cost is reduced; the production steps are simple, the operation requirement on workers is low, and the demolding is not needed when the mold is not disassembled, so that the production efficiency is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A prefabricated floor slab provided with a form-removal-free structure is characterized in that at least one end of the prefabricated floor slab is provided with a step-shaped notch, and the step-shaped notch is provided with the form-removal-free structure; exempt from to tear open mould includes netted baffle and anchor muscle, netted baffle is vertical place and anchor in the outside concrete of breach, the anchor muscle is fixed on the netted baffle, just the first end of anchor muscle is pre-buried in the precast concrete of precast floor slab, the second end is arranged in the breach of step-like.
2. The precast floor slab provided with the detachment-free formwork according to claim 1, wherein the anchoring ribs are stirrups with one or two closed ends, the stirrups are vertically arranged on a plane and are perpendicular to the mesh partition boards, and the closed ends of the stirrups are arranged at the gaps of the precast floor slab.
3. The precast floor slab provided with the form-removal-free according to claim 2, wherein the upper horizontal reinforcement of the stirrup is fixed in the mesh partition, and the lower horizontal reinforcement of the stirrup is placed under the mesh partition.
4. The precast floor slab provided with the form-removal-free according to claim 1, wherein reinforcing ribs are distributed on the mesh-like partition plate.
5. The precast floor slab provided with the form-removal-free property according to claim 4, wherein the reinforcing ribs are a plurality of vertical ribs vertically distributed in the mesh-like partition plate and parallel to each other; or at least one horizontal rib distributed horizontally in the mesh-like separator.
6. The precast floor slab provided with the form-removal-free according to claim 5, wherein the anchoring ribs are fixed to the reinforcing ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921716495.2U CN212001878U (en) | 2019-10-14 | 2019-10-14 | Prefabricated floor slab with non-stripping mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921716495.2U CN212001878U (en) | 2019-10-14 | 2019-10-14 | Prefabricated floor slab with non-stripping mold |
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| CN212001878U true CN212001878U (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952710A (en) * | 2019-10-14 | 2020-04-03 | 中民筑友科技产业有限公司 | Prefabricated floor slab without formwork removal and production method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110952710A (en) * | 2019-10-14 | 2020-04-03 | 中民筑友科技产业有限公司 | Prefabricated floor slab without formwork removal and production method thereof |
| CN110952710B (en) * | 2019-10-14 | 2023-12-12 | 中民筑友科技产业有限公司 | Prefabricated floor slab with disassembly-free mold and production method thereof |
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Address after: No. 410000, shaping street, Changsha, Kaifu City, Hunan Province Patentee after: Zhuyou Zhizao Technology Industry Group Co.,Ltd. Address before: 10 Zhongshi Road, shaping street, Kaifu District, Changsha City, Hunan Province Patentee before: Zhongmin zhuyou Technology Industry Co.,Ltd. |
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Effective date of registration: 20211217 Address after: 5 / F, office building 2, Zhongmin zhuyou Co., Ltd., No. 10, Zhongshi Road, shaping street, Kaifu District, Changsha City, Hunan Province, 410000 Patentee after: Zhuyou Zhizao Technology Investment Co.,Ltd. Address before: No. 410000, shaping street, Changsha, Kaifu City, Hunan Province Patentee before: Zhuyou Zhizao Technology Industry Group Co.,Ltd. |