CN213597359U - Prefabricated hollow stair - Google Patents
Prefabricated hollow stair Download PDFInfo
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- CN213597359U CN213597359U CN202022307090.2U CN202022307090U CN213597359U CN 213597359 U CN213597359 U CN 213597359U CN 202022307090 U CN202022307090 U CN 202022307090U CN 213597359 U CN213597359 U CN 213597359U
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Abstract
The utility model discloses a prefabricated hollow stair, which comprises a stair board and a plurality of steps fixed on the stair board; the ladder plate is divided into a plurality of weight reducing parts and a plurality of transverse rib parts, and the weight reducing parts and the transverse rib parts are alternately arranged along the length direction of the ladder plate; the weight reducing part is divided into N weight reducing hole parts and N +1 longitudinal rib parts along the width direction of the ladder board, N is larger than or equal to 1, the longitudinal rib parts and the weight reducing hole parts are alternately arranged along the width direction of the ladder board, and the bottom surfaces of the weight reducing hole parts are sunken upwards to form weight reducing grooves. Through set up at the floor bottom surface and subtract heavy groove, not only reached the stair board and subtract heavy effect, compare with the closed blind hole moreover, mould simple manufacture to construction work efficiency and convenience have been improved. And the arrangement of the transverse rib parts transversely arranged between the adjacent weight reducing parts and the longitudinal rib parts arranged along the longitudinal direction of the stair boards on two sides of the floor slab can ensure the structural strength and rigidity of the stair board.
Description
Technical Field
The utility model relates to a building industrialization technical field especially relates to a prefabricated hollow stair.
Background
With the development of the fabricated building, the prefabricated staircase is a common component in the fabricated building, and according to the relevant standards of national buildings, the prefabricated staircase with the floor height of 3 m is 1.95t in the length of the stair section, and the prefabricated staircase with the height of 5.2t in the length of the stair section of the scissors stair has a heavy self weight, so that the material waste is serious, a large tower crane is required for hoisting and installation during installation, and the mechanical measure cost and the engineering cost are high. In order to reduce the weight of the prefabricated staircase and the construction cost, relevant researches are made by domestic scholars.
Chinese patent 201220402202.5 discloses a prefabricated hollow plate type staircase, wherein a plurality of closed lightening cavities are longitudinally arranged in the staircase body, and the staircase is made into bamboo joint type by adopting spaced buried pipes, thereby increasing the bending resistance of the plate and lightening the weight of the staircase. Chinese patent 201420440270.X discloses a prefabricated hollow stair, including the stair board, set up on the stair board and mark time, and one side of marking time sets up horizontal blind hole, and the length direction of stair board sets up vertical blind hole, and the opening setting of blind hole is at the bottom position of stair board, under the prerequisite of guaranteeing stair intensity, and weight is lighter, has lightened weight for transportation and installation. Chinese patent 201520993084.3 discloses a prefabricated hollow stair, sets up a steel pipe skeleton in the stair backup pad and replaces the reinforcing bar net piece, and the inside cavity that alleviates whole stair weight that forms of steel pipe skeleton has reduced the quantity of concrete for prefabricated stair's weight greatly reduced is convenient for lift by crane, installation and transportation of prefabricated stair. Chinese patent 201620660219.9 discloses a prefabricated hollow stair, it includes the step board and fixes a plurality of marking time on the step board, it has at least one step board hole to open along its length direction in the step board, and is equipped with the hidden beam of arranging along step board length direction in the lateral wall in step board hole, is equipped with the strengthening rib in this hidden beam, through setting up the hidden beam, with as big as possible that the step board hole was seted up for thereby the evacuation rate reaches 40% -50% convenient prefabricated hollow stair's integral hoisting. Chinese patent 201720776499.4 discloses a precast concrete hollow stair step, in which a weight-reducing cylinder core is transversely arranged in the stair step to reduce the dead weight of the stair tread. Chinese patent 201820533389.X discloses a prefabricated hollow beam formula stair, it includes the prefabricated cement step tread that contains multistage ladder, and pre-buried the reinforcing bar in the prefabricated cement step tread, all pre-buried many PVC pipes in every ladder of prefabricated cement step tread, this stair still including the symmetry locate two prefabricated step roof beams on the bottom surface both sides of prefabricated cement step tread, strengthened the structural strength of stair, alleviateed the weight of stair.
In conclusion, the closed blind holes are arranged in the stair boards, so that the dead weight is reduced, but the die and the manufacture are complicated; and the through long holes are arranged by adopting a hole drawing method, so that the rigidity of the stair boards is reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a improve construction efficiency and convenience, improve the prefabricated hollow stair of floor structural strength and rigidity.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a prefabricated hollow stair comprises a stair board and a plurality of steps fixed on the stair board; the ladder plate is divided into a plurality of weight reducing parts and a plurality of transverse rib parts, and the weight reducing parts and the transverse rib parts are alternately arranged along the length direction of the ladder plate; the weight reduction part is divided into N weight reduction hole parts and N +1 longitudinal rib parts along the width direction of the ladder plate, N is larger than or equal to 1, the longitudinal rib parts and the weight reduction hole parts are alternately arranged along the width direction of the ladder plate, the bottom surfaces of the weight reduction hole parts are recessed upwards to form weight reduction grooves, and light core molds matched with the weight reduction grooves are arranged in the weight reduction grooves.
Through set up at the floor bottom surface and subtract heavy groove, subtract the inslot and fill the light mandrel, not only reached the stair board and subtract heavy effect, compare with closed blind hole, mould simple manufacture has saved the drawing of patterns process moreover to construction work efficiency and convenience have been improved. And the arrangement of the transverse rib parts transversely arranged between the adjacent weight reducing parts and the longitudinal rib parts arranged along the longitudinal direction of the stair boards on two sides of the floor slab can ensure the structural strength and rigidity of the stair board.
As a further improvement of the above technical solution:
the light core mold is a first hollow core mold or a first polyphenyl core mold. Therefore, the polyphenyl core mold is light in weight, the polyphenyl filling body is adopted, the concrete consumption of the stair is effectively reduced, the self weight of the stair is reduced by 35% -60%, the mechanical measure cost of production, transportation and installation of the prefabricated stair is reduced, and the engineering cost is saved.
In order to ensure the beautiful appearance that the bottom surface of the stair tread is a plane plate, the bottom surface of the light core mold is flush with the bottom surfaces of the longitudinal rib parts.
In order to further improve the structural strength and rigidity of the floor slab, the weight reduction grooves are bulged towards the inside of the weight reduction grooves along the lower parts of the two groove walls in the width direction of the stair boards to form convex parts.
In order to further improve the structural strength and rigidity of the floor slab, steel reinforcement frameworks are pre-embedded in the transverse rib parts and the longitudinal rib parts.
In order to further improve the structural strength and rigidity of the floor slab, a reinforcing mesh extending along the length direction of the floor slab is pre-embedded in the ladder slab, and the reinforcing mesh is positioned above the lightening grooves.
The reinforcing mesh is fixedly connected with each reinforcing cage.
In order to realize the weight reduction of the step, the step is provided with a transversely arranged weight reduction hole.
The lightening holes are cylindrical holes, and a second hollow core mold or a second polyphenyl core mold is pre-buried in the cylindrical holes.
The step plate and the plurality of steps are of an integrally formed concrete structure.
The two ends of the prefabricated hollow stair along the length direction are connected with stair platforms which are integrally formed with the prefabricated hollow stair.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a prefabricated hollow stair subtracts the groove through setting up in the floor bottom surface, subtracts the inslot and packs the light mandrel, has not only reached the stair board and has subtracted heavy effect, compares with closed blind hole moreover, and mould simple manufacture has saved the drawing of patterns process to construction work efficiency and convenience have been improved. And the arrangement of the transverse rib parts transversely arranged between the adjacent weight reducing parts and the longitudinal rib parts arranged along the longitudinal direction of the stair boards on two sides of the floor slab can ensure the structural strength and rigidity of the stair board.
Drawings
Fig. 1 is the utility model discloses prefabricated hollow stair's of embodiment longitudinal section structure sketch map.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is a longitudinal section structure diagram of the prefabricated hollow stair of the embodiment of the present invention.
Fig. 5 is a sectional view taken along line a-a of fig. 4.
Fig. 6 is a cross-sectional view B-B of fig. 5.
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention.
Example 1:
as shown in fig. 1 to 3, the prefabricated hollow stair of the embodiment comprises a stair tread 1 and a plurality of steps 2 fixed on the stair tread 1; the two ends of the prefabricated hollow stair along the length direction are connected with stair platforms 6. The step plate 1, the landing 6 and the steps 2 are of an integrally formed concrete structure. The step 2 is provided with a cylindrical hole which is transversely arranged, and a second hollow core mold 9 is pre-embedded in the cylindrical hole. Reinforcing mesh sheets are pre-embedded in the stair platform 6.
The step 1 is divided into a plurality of weight reducing parts and a plurality of transverse rib parts 11, and the weight reducing parts and the transverse rib parts 11 are alternately arranged along the length direction of the step 1; the weight reducing part is divided into 2 weight reducing hole parts and 3 longitudinal rib parts 12 along the width direction of the ladder board 1, the longitudinal rib parts 12 and the weight reducing hole parts are alternately arranged along the width direction of the ladder board 1, the bottom surfaces of the weight reducing hole parts are sunken upwards to form weight reducing grooves 13, and first hollow core moulds 8 matched with the weight reducing grooves 13 are arranged in the weight reducing grooves 13. The weight-reducing grooves 13 are formed with protrusions 14 protruding toward the inside of the weight-reducing grooves 13 along the lower portions of both groove walls in the width direction of the step 1.
Wherein, the reinforcing steel bar frameworks 3 are pre-embedded in the transverse rib parts 11 and the longitudinal rib parts 12.
Reinforcing bar net piece 4 that extends along its length direction is pre-buried in the riser 1, and reinforcing bar net piece 4 is located the top that subtracts heavy groove 13, and reinforcing bar net piece 4 all links firmly with each steel reinforcement cage 3.
Example 2:
the difference between this embodiment and embodiment 1 is that the lightening grooves 13 are filled with the first polyphenyl core mold 7, and the cylindrical holes are embedded with the second polyphenyl core mold 5.
The preparation process of the prefabricated hollow stair of the embodiment is as follows:
1) fixing a plurality of steel reinforcement frameworks 3 at corresponding positions in a cavity formed by enclosing a floor slab mould, arranging a first polyphenyl core mould 7 in the cavity formed by enclosing the floor slab mould according to requirements, and fixing through the steel reinforcement frameworks 3;
2) fixing a second polyphenyl core mould 5 in a cavity formed by enclosing the step mould;
3) and pouring to form the prefabricated hollow stair.
To sum up, the utility model discloses a prefabricated hollow stair's key technology lies in:
1. in order to achieve the effect of reducing the weight of the stair tread, the honeycomb cavities are longitudinally and transversely arranged along the stair tread, and the weight is reduced by utilizing the honeycomb cavities. Or in order to achieve the effect of reducing the weight of the stair tread, the polyphenyl filling bodies are arranged longitudinally and transversely along the stair tread, and the weight is reduced by utilizing the polyphenyl filling bodies; in order to ensure the beautiful appearance that the bottom surface of the stair tread is a plane plate,the bottom surface of the polyphenyl filler is flush with the bottom surface of the stair tread. The volume weight of the polyphenyl filler is 180-3。
2. In order to ensure the structure strength and rigidity of the stair board, U-shaped longitudinal ribs are arranged between the honeycomb cavities or the polyphenyl fillers which are transversely arranged and on the two sides of the floor along the longitudinal direction of the stair board, U-shaped transverse ribs are arranged between the honeycomb cavities or the polyphenyl fillers which are longitudinally arranged along the transverse direction of the stair board, and a hidden beam steel bar framework is arranged in the longitudinal transverse ribs. The honeycomb cavity or the polyphenyl filling body and the top surfaces of the U-shaped longitudinal and transverse ribs are provided with structural plates of the stair boards, and reinforcing mesh sheets are arranged in the structural plates.
3. In order to further reduce the weight, a transversely arranged circular core die is embedded in the stair step, and concrete solid bodies are arranged at two ends of the step.
4. The specification dimensions (length x width) of the honeycomb cavities or the polyphenyl fillers may be: the standard of 600mm multiplied by 300mm, 500mm multiplied by 300mm, 900mm multiplied by 450mm and the like is comprehensively determined according to the stress performance and the weight loss of the stair structure.
5. The circular core mold pre-embedded in the step can be made of GBF pipes, PVC pipes, light polystyrene bars and the like.
6. The stair steps and the stair boards are integrally prefabricated and molded.
The beneficial effect that above-mentioned prefabricated hollow stair brought:
1. by adopting the honeycomb cavity and the circular core die, the concrete consumption of the stair is effectively reduced, the self weight of the stair is reduced by 35-50%, the mechanical measure cost of production, transportation and installation of the prefabricated stair is reduced, and the engineering cost is saved.
2. Compared with a core-pulling weight-reducing method, the honeycomb cavity improves the construction efficiency and convenience.
3. The longitudinal and transverse ribs arranged on the two sides of the honeycomb core mold improve the bending resistance of the floor slab.
The above description is only for the preferred embodiment of the present application and should not be taken as limiting the present application in any way, and although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application, and those skilled in the art should understand that they can make various changes and modifications within the technical scope of the present application without departing from the scope of the present application, and therefore all the changes and modifications can be made within the technical scope of the present application.
Claims (10)
1. A prefabricated hollow stair comprises a stair board (1) and a plurality of steps (2) fixed on the stair board (1); the ladder plate is characterized in that the ladder plate (1) is divided into a plurality of weight reducing parts and a plurality of transverse rib parts (11), and the weight reducing parts and the transverse rib parts (11) are alternately arranged along the length direction of the ladder plate (1); the weight reducing part is divided into N weight reducing hole parts and N +1 longitudinal rib parts (12) along the width direction of the ladder plate (1), N is larger than or equal to 1, the longitudinal rib parts (12) and the weight reducing hole parts are alternately arranged along the width direction of the ladder plate (1), the bottom surfaces of the weight reducing hole parts are recessed upwards to form weight reducing grooves (13), and light core molds matched with the weight reducing grooves (13) are arranged in the weight reducing grooves (13).
2. The prefabricated hollow staircase of claim 1, characterized in that said lightweight core is a first hollow core (8) or a first polyphenyl core (7).
3. The prefabricated hollow staircase of claim 2, wherein the bottom surface of the lightweight core is flush with the bottom surface of the longitudinal ribs (12).
4. Prefabricated staircase according to any of claims 1-3, characterised in that the weight-reducing grooves (13) are formed with protrusions (14) protruding towards the inside of the weight-reducing grooves (13) in the lower part of both groove walls in the width direction of the riser (1).
5. The prefabricated hollow staircase according to any of the claims 1 to 3, characterized in that a reinforcement cage (3) is embedded in both the transverse rib sections (11) and the longitudinal rib sections (12).
6. The prefabricated hollow staircase according to claim 5, characterized in that reinforcing mesh sheets (4) extending along the length direction of the staircase board (1) are embedded in the staircase board, and the reinforcing mesh sheets (4) are positioned above the lightening grooves (13).
7. The prefabricated hollow staircase according to claim 6, characterized in that said mesh of reinforcement (4) is secured to each reinforcement cage (3).
8. The prefabricated hollow staircase according to any of the claims 1 to 3, characterized in that said tread (2) has transversely arranged lightening holes, inside which a second hollow core or second polyphenyl core (5) is embedded.
9. The prefabricated hollow staircase according to any of the claims 1 to 3, characterized in that the risers (1) and the steps (2) are of an integrally formed concrete structure.
10. The prefabricated hollow staircase according to any of the claims 1-3, characterized in that the two ends of the prefabricated hollow staircase in the length direction are connected with landings (6) which are integrally formed with the prefabricated hollow staircase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022307090.2U CN213597359U (en) | 2020-10-19 | 2020-10-19 | Prefabricated hollow stair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022307090.2U CN213597359U (en) | 2020-10-19 | 2020-10-19 | Prefabricated hollow stair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213597359U true CN213597359U (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022307090.2U Active CN213597359U (en) | 2020-10-19 | 2020-10-19 | Prefabricated hollow stair |
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| Country | Link |
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| CN (1) | CN213597359U (en) |
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2020
- 2020-10-19 CN CN202022307090.2U patent/CN213597359U/en active Active
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