CN213174518U - Connecting structure for connecting parts on prefabricated stairs - Google Patents
Connecting structure for connecting parts on prefabricated stairs Download PDFInfo
- Publication number
- CN213174518U CN213174518U CN202021252083.0U CN202021252083U CN213174518U CN 213174518 U CN213174518 U CN 213174518U CN 202021252083 U CN202021252083 U CN 202021252083U CN 213174518 U CN213174518 U CN 213174518U
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- prefabricated
- prefabricated staircase
- cast
- connecting part
- stair
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Abstract
The utility model discloses a connecting part connecting structure on a prefabricated staircase, which comprises a connecting part on the prefabricated staircase, wherein the connecting part on the prefabricated staircase is arranged on a bracket formed on one side of an upper-layer ladder beam; a plurality of extending steel bars arranged along the width direction of the prefabricated staircase are pre-embedded in the connecting part of the prefabricated staircase, and each extending steel bar is arranged along the length direction of a stair plate of the prefabricated staircase; the extending steel bars extend to the cast-in-place part along the length direction of the stair plates of the prefabricated stair and then are bent to be horizontal, and extend through the upper-layer stair beam along the horizontal direction to be lapped with the steel bars in the supporting platform plate; and the cast-in-place part and the supporting platform plate are cast and molded together. The utility model discloses a structure is built to connecting portion on supporting platform board, upper ladder roof beam and the prefabricated stair, on the technical layer who has kept prefabricated stair solution traditional cast-in-place formwork process problem, further solve the problem that there is the hidden danger of ftracture in connecting portion node on the current prefabricated stair, guaranteed the wholeness of structure.
Description
Technical Field
The utility model relates to a prefabricated staircase joint construction, more specifically say, relate to a prefabricated staircase goes up connecting portion joint construction.
Background
The assembly type building is a novel building form suitable for the national conditions of China, and is mainly characterized in that parts such as prefabricated columns, prefabricated beams, laminated slabs, prefabricated doors and windows and the like are prefabricated by a factory firstly, and then the prefabricated parts are transported to a construction site and assembled on the construction site. Compared with a cast-in-place structure, the fabricated building has the advantages of high production efficiency, high construction speed, small cast-in-place quantity of construction sites, energy conservation, environmental protection and the like.
The prefabricated staircase can greatly reduce the use of stair templates, and is a prefabricated component with the widest application and the highest value at present. Because the stair generally does not participate in structural earthquake resistance, is easy to produce, and can save a large number of templates, the prefabricated stair is most widely applied. However, according to project construction at the present stage and later-stage feedback conditions, the existing prefabricated staircase connection node generally has the serious cracking problem, the prefabricated staircase and the cast-in-place concrete ladder beam are connected together in a seam plugging mode, and the seam has serious cracking hidden danger under the common conditions.
Through retrieval, a technical scheme for improving the problems is disclosed, wherein the technical scheme is as follows, the Chinese application number is 201920042391.1, the publication date is 2019, 11 and 26, and the name of the utility model is as follows: prefabricated stair connected node discloses a prefabricated stair connected node for being connected of prefabricated bench and prefabricated terraced roof beam is equipped with buried bolt in advance on the prefabricated terraced roof beam, is equipped with bench preformed hole on the prefabricated bench, and the equipartition all around of bench preformed hole has the hole limit strengthening rib, and the bench preformed hole cover of prefabricated bench is established on the buried bolt in advance of prefabricated terraced roof beam. The problem of many processes such as traditional cast-in-place technology formwork has been solved to a certain extent to this patent, has saved materials such as labour and template. However, the connection between the prefabricated ladder beam and the prefabricated ladder beam is due to the fact that the prefabricated ladder beam is subjected to rear joint filling, the problem of cold joints exists between prefabricated components in the beam, and the problem of later-stage cracking is large.
Disclosure of Invention
1. Technical problem to be solved by the utility model
An object of the utility model is to overcome foretell not enough, provide a connecting portion joint construction on prefabricated staircase, adopt the technical scheme of the utility model, simple structure, construction convenience, supporting platform board, upper ladder roof beam and prefabricated staircase go up connecting portion and pour into an integral structure, on having kept prefabricated staircase to solve the technical layer of traditional cast-in-place formwork process problem, further solve the problem that there is the hidden danger of ftracture in connecting portion node on the current prefabricated staircase, guaranteed the wholeness of structure.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model discloses a prefabricated staircase upper connecting part connecting structure, which comprises a prefabricated staircase upper connecting part, wherein the prefabricated staircase upper connecting part is arranged on a bracket formed on one side of an upper ladder beam, and a cement mortar leveling layer is arranged between the prefabricated staircase upper connecting part and the bracket; a plurality of protruding reinforcing steel bars arranged along the width direction of the prefabricated staircase are embedded in the connecting part of the prefabricated staircase, and each protruding reinforcing steel bar is arranged along the length direction of a stair plate of the prefabricated staircase; the extending reinforcing steel bars extend to the cast-in-place part along the length direction of the stair plate of the prefabricated stair and then are bent to be horizontal, and extend into the supporting platform plate along the horizontal direction to be lapped with the reinforcing steel bars in the supporting platform plate; and the cast-in-place part, the supporting platform plate and the post-pouring part of the upper-layer ladder beam are cast and molded together.
Furthermore, pre-buried opening hoops are pre-buried in the prefabricated staircase upper connecting part, and the pre-buried opening hoops are exposed out of the upper surface of the prefabricated staircase upper connecting part and arranged in the cast-in-place part; the connecting rib in the cast-in-place part and the pre-embedded opening hoop in the connecting part on the prefabricated staircase form a closed hoop; the closed stirrups are bound together with bottom reinforcing steel bars arranged in the connecting part on the prefabricated staircase, and the closed stirrups are bound together with top reinforcing steel bars arranged in the cast-in-place part.
Furthermore, the upper surface and the side surface of the prefabricated staircase connecting part are both designed into rough surfaces.
Furthermore, a cast-in-situ seam is reserved between the side face of the upper connecting part of the prefabricated staircase and the upper ladder beam, and the width of the reserved cast-in-situ seam is 20 mm.
Furthermore, the length of the extending reinforcing steel bars overlapped with the reinforcing steel bars in the supporting platform plate is equal to or more than fifty-six times of the diameter of the extending reinforcing steel bars.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:
(1) the connecting structure of the prefabricated staircase upper connecting part uses the prefabricated staircase, can replace the problems of the traditional staircase cast-in-place formwork, reinforcement, concrete pouring and other processes, greatly saves template materials, shortens the construction period of the staircase, and reduces the labor cost;
(2) the utility model discloses a prefabricated staircase goes up connecting portion connection structure, its prefabricated staircase goes up connecting portion tip and is provided with the extension reinforcing bar, and the extension reinforcing bar extends to cast-in-place portion bending to the level after the halfpace length direction of prefabricated staircase, and extend through the reinforcing bar overlap joint in upper terraced roof beam and the supporting platform board along the horizontal direction, cast-in-place portion pours the shaping together with the supporting platform board after connecting like this, make supporting platform board, upper terraced roof beam, cast-in-place portion and prefabricated staircase go up connecting portion connect into an integrated structure, the wholeness of structure has been guaranteed, make the installation of prefabricated staircase go up connecting portion firm reliable; in addition, as the prefabricated staircase upper connecting part connecting structure is intersected with the existing prefabricated staircase upper connecting part connecting structure, the ladder beam does not need to be provided with embedded bolt reinforcing steel bars, so that the problem that the embedded bolt reinforcing steel bars and the prefabricated staircase reserved holes are not aligned is solved;
(3) the utility model discloses a prefabricated staircase upper connecting part connection structure, pre-buried opening hoop has been pre-buried in its prefabricated staircase upper connecting part, and this pre-buried opening hoop all exposes the upper surface of prefabricated staircase upper connecting part and locates in the cast-in-place portion, and the splice bar in the cast-in-place portion constitutes the closed hoop with the pre-buried opening hoop in the prefabricated staircase for half of this combined closed hoop locates in the prefabricated staircase upper connecting part, and the other half locates in the cast-in-place portion, has played the shearing resistant effect between prefabricated staircase upper connecting part and the cast-in-place portion;
(4) the connecting structure of the prefabricated staircase connecting part of the utility model has the advantages that the upper surface and the side surface of the prefabricated staircase connecting part are both designed into rough surfaces, so that the prefabricated staircase connecting part is more closely connected with the cast-in-place part;
(5) the utility model discloses a connecting portion joint construction on prefabricated staircase, reserve cast-in-place seam between the side of connecting portion on its prefabricated staircase and the upper ladder roof beam, avoid pouring the cold joint problem that produces because of the secondary.
Drawings
Fig. 1 is a sectional view of a connection structure of a prefabricated staircase connection part of the present invention;
fig. 2 is a schematic structural view of the prefabricated staircase connecting part arranged on the bracket in the prefabricated staircase connecting part connecting structure of the utility model;
fig. 3 is a top view of the connection structure of the prefabricated staircase connection structure of the present invention.
The reference numerals in the schematic drawings illustrate: 1. prefabricating an upper connecting part of the stair; 2. an upper ladder beam; 2-1, post-pouring part; 3. a bracket; 4. extending the reinforcing steel bars; 5. a cast-in-place section; 6. a support platform plate; 7. pre-burying an opening hoop; 8. connecting ribs; 9. bottom reinforcing steel bars; 10. a top steel bar; 11. casting a seam in situ; 12. and (5) leveling a cement mortar layer.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Examples
With reference to fig. 1 and 3, the connecting structure for the prefabricated staircase connecting part comprises a prefabricated staircase connecting part 1, wherein the prefabricated staircase connecting part 1 is arranged on a bracket 3 formed on one side of an upper-layer ladder beam 2, a cement mortar leveling layer 12 is arranged between the prefabricated staircase connecting part 1 and the bracket 3, a plurality of protruding reinforcing steel bars 4 arranged along the width direction of the prefabricated staircase are pre-embedded in the prefabricated staircase connecting part 1, and each protruding reinforcing steel bar 4 is arranged along the length direction of a ladder board of the prefabricated staircase; the extending steel bars 4 extend to the cast-in-place part 5 along the length direction of the stair plate of the prefabricated staircase, then are bent to be horizontal, extend into the supporting platform plate 6 along the horizontal direction and are lapped with the steel bars in the supporting platform plate 6, wherein the length of the extending steel bars 4 lapped with the steel bars in the supporting platform plate 6 is equal to or more than fifty-six times of the diameter of the extending steel bars 4, and the risk of crack generation is reduced; the cast-in-place part 5, the supporting platform plate 6 and the post-cast part 2-1 of the upper ladder beam 2 are cast and molded together, so that the supporting platform plate, the upper ladder beam and the prefabricated stair upper connecting part are cast into an integral structure, the structural integrity is ensured, and the prefabricated stair upper connecting part is stable and reliable to install; in addition, as the prefabricated staircase upper connecting part connecting structure is intersected with the existing prefabricated staircase upper connecting part connecting structure, the ladder beam does not need to be provided with embedded bolt reinforcing steel bars, so that the problem that the embedded bolt reinforcing steel bars and the prefabricated staircase reserved holes are not aligned is solved; the prefabricated staircase is reserved and used, the problems of procedures such as traditional staircase cast-in-place formwork support, reinforcement bar binding and concrete pouring can be solved, a large amount of template materials are saved, the construction period of the staircase is shortened, and the labor cost is reduced; in order to enable the connection between the prefabricated stair upper connecting part and the cast-in-place part to be more compact, the upper surface and the side surface of the prefabricated stair upper connecting part 1 are both designed into rough surfaces; in order to avoid the cold joint problem caused by secondary pouring, a cast-in-place joint 11 is reserved between the side surface of the prefabricated staircase upper connecting part 1 and the upper ladder beam, and the width of the reserved cast-in-place joint 11 is 20 mm.
Continuously, pre-embedded opening hoops 7 are pre-embedded in the prefabricated stair upper connecting part 1, and the pre-embedded opening hoops 7 are exposed out of the upper surface of the prefabricated stair upper connecting part 1 and arranged in the cast-in-place part 5; a connecting rib 8 in the cast-in-place part 5 and a pre-buried opening hoop 7 in the prefabricated staircase upper connecting part 1 form a closed hoop; the closed stirrups are bound together with bottom reinforcing steel bars 9 arranged in the prefabricated staircase upper connecting part 1, and the closed stirrups are bound together with top reinforcing steel bars 10 arranged in the cast-in-place part 5; half of the closed stirrups combined are arranged in the prefabricated stair upper connecting part, and the other half of the closed stirrups are arranged in the cast-in-place part, so that the shearing resisting effect between the prefabricated stair upper connecting part and the cast-in-place part is achieved.
During the construction, all establish into the mat surface with the side with the upper surface of prefabricated staircase upper connecting portion earlier, owing to stretch out in the reinforcing bar need stretch into supporting platform board, consequently upper ladder roof beam and supporting platform board are under construction stage by stage. Referring to fig. 2, after the formwork is supported, an upper ladder beam and a bracket are poured, the upper ladder beam is poured to the position of the upper surface of the connecting part on the prefabricated staircase, after the concrete reaches the corresponding strength, the connecting part on the prefabricated staircase is hoisted to the bracket, and a cement mortar leveling layer with the thickness of 20mm needs to be smeared on the bracket before hoisting; after the prefabricated staircase is hoisted in place, the extending steel bars at the end part of the upper connecting part of the prefabricated staircase extend to the cast-in-place part along the length direction of the stair plate of the prefabricated staircase and then are bent to be horizontal, extend to the inside of the supporting platform plate along the horizontal direction and are lapped with the steel bars in the supporting platform plate, and then the supporting platform plate, the post-pouring part of the upper-layer stair beam and the cast-in-place part of the upper layer of the upper connecting part of the prefabricated staircase are integrally poured to form an integral structure.
The utility model discloses a connecting portion joint construction on prefabricated staircase, simple structure, construction convenience, connecting portion pour into a structure on supporting platform board, upper ladder roof beam and the prefabricated staircase, on the technical layer that has kept prefabricated staircase to solve traditional cast-in-place formwork process problem, further solve the problem that there is the hidden danger of ftractureing in connecting portion node on the current prefabricated staircase, guaranteed the wholeness of structure.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a prefabricated stair go up connecting portion joint construction, includes prefabricated stair go up connecting portion (1), prefabricated stair go up connecting portion (1) set up on bracket (3) that upper ladder roof beam (2) one side formed, prefabricated stair go up connecting portion (1) and bracket (3) between be provided with cement mortar screed-coat (12), its characterized in that: a plurality of protruding reinforcing steel bars (4) arranged along the width direction of the prefabricated staircase are embedded in the prefabricated staircase upper connecting part (1), and each protruding reinforcing steel bar (4) is arranged along the length direction of a stair plate of the prefabricated staircase; the extending reinforcing steel bars (4) extend to the cast-in-place part (5) along the length direction of the stair boards of the prefabricated staircase, then are bent to be horizontal, and extend to the inside of the supporting platform board (6) along the horizontal direction to be lapped with the reinforcing steel bars in the supporting platform board (6); and the cast-in-place part (5), the supporting platform plate (6) and the post-cast part (2-1) of the upper-layer ladder beam (2) are cast and molded together.
2. A prefabricated staircase connecting part connecting structure as defined in claim 1, wherein: an embedded opening hoop (7) is embedded in the prefabricated staircase upper connecting part (1), and the embedded opening hoops (7) are exposed out of the upper surface of the prefabricated staircase upper connecting part (1) and arranged in the cast-in-place part (5); a connecting rib (8) in the cast-in-place part (5) and a pre-buried opening hoop (7) in the prefabricated stair upper connecting part (1) form a closed hoop; the closed stirrups are bound with bottom reinforcing steel bars (9) arranged in the connecting part (1) on the prefabricated staircase, and the closed stirrups are bound with top reinforcing steel bars (10) arranged in the cast-in-place part (5).
3. A prefabricated staircase connecting part connecting structure as defined in claim 1, wherein: the upper surface and the side surface of the prefabricated staircase upper connecting part (1) are both designed into rough surfaces.
4. A prefabricated staircase connecting part connecting structure as defined in claim 1, wherein: a cast-in-situ seam (11) is reserved between the side face of the prefabricated staircase upper connecting part (1) and the upper ladder beam, and the width of the reserved cast-in-situ seam (11) is 20 mm.
5. A prefabricated staircase connecting part connecting structure as defined in claim 1, wherein: the length of the extending steel bars (4) which are overlapped with the steel bars in the supporting platform plate (6) is equal to or more than fifty-six times of the diameter of the extending steel bars (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021252083.0U CN213174518U (en) | 2020-07-01 | 2020-07-01 | Connecting structure for connecting parts on prefabricated stairs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021252083.0U CN213174518U (en) | 2020-07-01 | 2020-07-01 | Connecting structure for connecting parts on prefabricated stairs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213174518U true CN213174518U (en) | 2021-05-11 |
Family
ID=75790275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021252083.0U Expired - Fee Related CN213174518U (en) | 2020-07-01 | 2020-07-01 | Connecting structure for connecting parts on prefabricated stairs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213174518U (en) |
-
2020
- 2020-07-01 CN CN202021252083.0U patent/CN213174518U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210511 |
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| CF01 | Termination of patent right due to non-payment of annual fee |