CN213174527U - Prefabricated staircase connection structure for improving stability of outer shear wall of staircase - Google Patents
Prefabricated staircase connection structure for improving stability of outer shear wall of staircase Download PDFInfo
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- CN213174527U CN213174527U CN202022151753.6U CN202022151753U CN213174527U CN 213174527 U CN213174527 U CN 213174527U CN 202022151753 U CN202022151753 U CN 202022151753U CN 213174527 U CN213174527 U CN 213174527U
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Abstract
The utility model discloses an improve prefabricated stair joint construction of stairwell shear force outer wall stability relates to the building structure field, prefabricated stair place the overhanging cantilever sheet metal at the cast-in-place terraced roof beam of floor, its upper and lower extreme all has the U-shaped reinforcing bar to stretch out, the crisscross ligature of overhanging reinforcing bar then the pouring concrete that these reinforcing bars and the cast-in-place terraced roof beam of floor reserved forms wholly, prefabricated stair side is equipped with the level to and vertical preformed hole, the downthehole connecting bolt that links to each other with the pre-buried threaded sleeve of stairwell shear force outer wall that is equipped with, downthehole injection height does not have shrink mortar. The invention improves the stability of the shear outer wall of the staircase, enlarges the application range of the prefabricated staircase, greatly reduces the project amount of cast-in-place staircases, lowers the prefabrication and installation cost, accelerates the production and installation progress, improves the installation effect of the staircase, and has the social benefit and the economic value of rapid construction, energy conservation and material conservation.
Description
Technical Field
The utility model relates to a building structure technical field relates to a prefabricated staircase joint construction for assembled reinforced concrete house high-rise residential building, is particularly useful for being equipped with the stairwell that high-rise residential building has the shear force outer wall, can improve stairwell shear force outer wall stability.
Background
The standardization degree of the multi-stairs of the high-rise dwelling house is high, and the prefabricated stairs with hinged upper ends and fixed lower ends in sliding connection can obviously reduce the workload of on-site formwork erecting and formwork removing, improve the on-site engineering quality, improve the on-site civilized construction level and accelerate the construction progress. But at present, elevator shafts and fire staircases are often arranged in a core barrel of many high-rise buildings, as the core barrel is provided with holes and has more floor rigidity weakened too much, weak connection exists, a shear outer wall is generally arranged at the periphery of the core barrel (including an outer wall of the staircase) in order to ensure the integral rigidity, and a barrel body is formed as much as possible to improve the integral rigidity of the core barrel. Therefore, the conventional prefabricated staircase with the hinged upper end and the fixed sliding lower end cannot be adopted, and the slidable prefabricated staircase can cause the outer shear wall of the staircase to lose the outer surface support, so that the outer surface stability of the outer shear wall of the staircase is weakened, the structural safety of the shear wall of the main body is influenced, and the prefabricated staircase for many similar projects is abandoned to adopt the integral cast-in-place staircase. Cast-in-place stairs are inclined bent components and stair step dogteeth are staggered, stair field formwork erection in a narrow stair space between stairs is very troublesome, cast-in-place concrete is very difficult, bleeding and maintenance water generated by casting of vibrated concrete often cause cross flow of sewage between stairs, so that the construction phenomenon of dirty and messy conditions generally exists on the site, civilized construction cannot be realized, and a great deal of inconvenience is undoubtedly brought to field construction by the cast-in-place stairs.
The shear wall structure is mainly adopted in high-rise houses, the overall lateral stiffness of the houses is high, generally, cast-in-place integral stairs have little influence on the overall stiffness, the earthquake action absorbed by the stairs is very limited, and the stairs cannot be damaged at all under the earthquake action, which is proved by cast-in-place integral shear wall structures integrally cast by most of the stairs, and this shows that even if the integral casting does not release the rigidity of the stairs, the whole main body structure is not adversely affected, in this way, the upper end hinged and fixed lower end sliding connection of the conventional prefabricated stairs can be optimized to change the connection mode into cast-in-place.
In summary, the conventional prefabricated staircase affects the stability of the shear outer wall of the staircase, so a feasible prefabricated staircase connection structure is needed to improve the stability of the shear outer wall of the staircase, thereby fully exerting the characteristics of building industrialization and enabling the prefabricated staircase to be applied to the staircase with the shear outer wall.
Disclosure of Invention
The utility model discloses a reinforced concrete prefabricated staircase joint construction has optimized conventional prefabricated staircase end connection, has broken through conventional prefabricated staircase and can not be applied to the stair that has the shear force outer wall, has enlarged prefabricated staircase's range of application, has greatly reduced cast-in-place stair engineering volume, has saved building material, has reduced prefabrication and installation cost for the production installation progress has improved stair installation effectiveness.
The utility model provides a technical scheme that its technical problem adopted is: the existing conventional connection mode that the upper end of the prefabricated part is hinged and the lower end of the prefabricated part slides is changed into the mode that the prefabricated part is directly placed on an overhanging cantilever thin plate of a cast-in-place floor ladder beam, and then concrete is poured. The vertical face of the board side of prefabricated staircase is equipped with the level according to certain interval along parallel halfpace length direction and to the preformed hole, is equipped with the connecting bolt of tip area spring in the preformed hole, and this bolt is connected prefabricated staircase and staircase shear force outer wall into whole to the off-plate that makes prefabricated staircase can regard as this shear force outer wall supports, has guaranteed the off-plate stability of shear force outer wall.
The utility model discloses a reinforced concrete prefabricated staircase joint construction's direct effect is: the prefabricated staircase overcomes the defect of the connection mode that the upper end is hinged and the lower end slides when the conventional prefabricated staircase is widely used, and is directly cast in place with a floor structure, so that the application range of the prefabricated staircase in the high-rise building of the type is expanded, the on-site construction is greatly facilitated, the engineering cost is remarkably reduced, the rapid construction, energy conservation and material conservation social benefits and economic values are realized, and the development of the modern fabricated reinforced concrete building is greatly promoted.
Drawings
The following detailed description of the specific structure of the present invention with reference to the accompanying drawings
Figure 1 is the utility model discloses a section view is connected to prefabricated stair upper end.
Fig. 2 is the utility model discloses a section view is connected to prefabricated stair lower extreme.
Fig. 3 is a sectional view of the utility model taken along line a-a.
The method comprises the following steps of 1-prefabricated staircase, 2-prefabricated staircase closed U-shaped reinforcing steel bars, 3-post-pouring concrete, 4-floor cast-in-place staircase beams, 5-floor cast-in-place staircase beams, 6-cast-in-place cantilever slabs, 7-prefabricated staircase side faces are horizontally reserved with holes, 8-reserved vertical holes, 9-staircase shear outer walls, 10-on-site pouring of high-strength shrinkage-free mortar, 11-detachable temporary steel frames, 12-springs, 13-nuts, 14-embedded steel backing plates, 15-embedded connecting bolts, 16-embedded threaded sleeves, 17-plate side vertical faces of the prefabricated staircase, 18-staircase step horizontal faces, 19-gaps between the prefabricated staircase and the outer shear walls are filled with the high-strength mortar, and 20-filling gaps with PE (polyethylene) bars for caulking.
Detailed Description
The utility model discloses the most crucial design lies in: the prefabricated staircase is directly placed on the cantilever slab extending outwards of the cast-in-place staircase beam and is poured integrally with the floor structure, the prefabricated staircase side plate is provided with a reserved hole, a connecting bolt is arranged in the hole, a threaded sleeve is pre-embedded in the shear outer wall of the staircase, and the prefabricated staircase and the threaded sleeve form a whole through the connecting bolt, so that the prefabricated staircase can serve as an outer surface support of the shear outer wall, and the stability of the shear outer wall of the staircase is improved.
In order to explain technical contents, structural features, objects, and effects of the present invention in detail, the present invention will be explained in detail with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, the system comprises a prefabricated staircase 7, a floor cast-in-place stair beam 5, a cast-in-place overhanging cantilever plate 6 and a detachable temporary steel frame 11.
Further, the method comprises the following steps: the prefabricated staircase 7 rests on the upper surface of a cast-in-place overhanging cantilevered slab 6 projecting from a floor cast-in-place ladder beam 5.
Further, the method comprises the following steps: the upper end of the prefabricated staircase 7 extends out of the closed U-shaped steel bar 2.
Further, the method comprises the following steps: the cast-in-place floor ladder beam 5 is provided with reserved overhanging U-shaped reinforcing steel bars 4, overhanging cantilever plates 6 and detachable temporary steel frames 11, and the temporary steel frames 11 are used for supporting the overhanging cantilever plates 6 so as to bear the weight transmitted by the prefabricated staircase 7.
Further, the method comprises the following steps: the closed U-shaped reinforcing steel bars 2 and the overhanging U-shaped reinforcing steel bars 4 are mutually overlapped, staggered, bound and overlapped, and then post-cast concrete 3 is poured to form a whole.
Further, the method comprises the following steps: the vertical face 17 on the side of the prefabricated staircase 7 is provided with the horizontal preformed holes 7 at equal intervals along the length direction parallel to the staircase boards, and the horizontal face 18 adjacent to the staircase step is provided with the vertical preformed holes 8 vertical to the horizontal preformed holes 7, please refer to fig. 3.
Further, the method comprises the following steps: the horizontal preformed hole 7 and the vertical preformed hole 8 are vertically communicated, and an embedded connecting bolt 16 with a spring 12 at the end part is arranged in the horizontal preformed hole 7, please refer to fig. 3.
Referring to fig. 2, the system comprises a prefabricated staircase 7, a floor cast-in-place stair beam 5, a cast-in-place overhanging cantilever plate 6 and a detachable temporary steel frame 11.
The prefabricated staircase 7 is mainly used for illustrating the connection mode of the lower end of the prefabricated staircase and is completely the same as the connection mode of the upper end of the prefabricated staircase 7 shown in figure 1.
Referring to fig. 3, the cross-sectional view a-a mainly illustrates the connection relationship and details between the vertical plate-side surface 17 and the outer shear wall 9 of the prefabricated staircase, including the vertical plate-side surface 17, the outer shear wall 9, the horizontal preformed hole 7, the preformed vertical hole 8, the high-strength non-shrinkage mortar 10, the spring 12, the nut 13, the embedded steel backing plate 14, the embedded threaded sleeve 15, and the embedded connecting bolt 16.
Further, the method comprises the following steps: and a spring 12, a nut 13, an embedded steel backing plate 14 and an embedded connecting bolt 16 are arranged in the horizontal preformed hole 7.
Further, the method comprises the following steps: the depth of the horizontal preformed hole 7 is larger than the length of the embedded connecting bolt 16, so that the bolt 16 can be completely hidden in the horizontal preformed hole before installation and cannot extend out of the vertical surface 17 on the plate side, and the installation of the staircase is facilitated.
Further, the method comprises the following steps: after the stair is installed in place, the springs 12 are released, the embedded connecting bolts 16 can be ejected out and inserted into the corresponding embedded threaded sleeves 15 of the shear outer wall 9, and then the bolts 16 are screwed and fixed by using a spanner.
Further, the method comprises the following steps: the nut 13 is used for connecting and fixing the embedded connecting bolt 16 at the embedded steel backing plate 14.
Further, the method comprises the following steps: the steel shim plate 14 is firmly fixed inside the vertical face 17 of the prefabricated staircase slab for transmitting and releasing the axial forces to which the connecting bolts 16 are subjected, the face being provided with holes of larger diameter than the bolts 16 for the threaded insertion.
Further, the method comprises the following steps: the diameter of the reserved vertical hole 8 is not less than 50mm so as to install the nut 13.
Further, the method comprises the following steps: the inner surface of the shear outer wall 9 is provided with embedded thread sleeves 15 which correspond to the positions of the horizontal preformed holes 7 one by one, and the internal thread distance of the embedded thread sleeves is completely the same as that of the embedded connecting bolts 16.
Further, the method comprises the following steps: the gap between the shear outer wall 9 and the vertical plate side surface 17 of the prefabricated staircase is used for adjusting construction installation errors of the prefabricated staircase 7, the PE rod hole 20 for caulking is plugged into the bottom of the rear joint after the shear outer wall 9 and the prefabricated staircase are accurately positioned and firmly connected, and then high-strength mortar 19 is filled in to connect the shear outer wall 9 and the prefabricated staircase into a whole, so that the prefabricated staircase 7 can be effectively used as an out-of-plane support of the shear outer wall 9, and the out-of-plane stability of the shear outer wall 9.
Further, the method comprises the following steps: and after the pre-buried connecting bolts 16 are firmly connected, pouring high-strength shrinkage-free mortar 10 into the reserved vertical holes 8 and the reserved horizontal holes 7, and vibrating the mortar for compaction.
The first … … and the second … … are only used for name differentiation and do not represent how different the importance and position of the two are.
Here, the upper, lower, left, right, front, and rear represent only relative positions thereof and do not represent absolute positions thereof.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (5)
1. The utility model provides an improve prefabricated staircase joint construction of staircase shear force outer wall stability which characterized in that: the upper end or the lower end of the prefabricated staircase is provided with a reserved closed U-shaped steel bar; the cast-in-situ floor ladder beam connected with the upper end or the lower end of the prefabricated staircase is provided with a cast-in-situ overhanging cantilever plate and a closed U-shaped reinforcing steel bar, and a temporary steel frame which can be detached in the later period is arranged at the bottom of the cantilever plate; the prefabricated staircase is characterized in that closed U-shaped steel bars reserved at the upper end or the lower end of the prefabricated staircase are overlapped, staggered, bound and overlapped with the outer extending ribs of the floor cast-in-place ladder beam, and then concrete is poured after pouring to form a whole.
2. The prefabricated staircase connection structure for improving the stability of the shear outer wall of the staircase according to the claim 1, wherein: the vertical face of the board side of prefabricated staircase is equipped with equidistant level along parallel riser length direction to the preformed hole, is equipped with the connecting bolt of tip area spring in the preformed hole.
3. The prefabricated staircase connection structure for improving the stability of the shear outer wall of the staircase according to the claim 1, wherein: the horizontal plane of the stair step is provided with a reserved vertical hole which is vertical to the horizontal direction of the side surface of the stair step and faces the reserved hole.
4. The prefabricated staircase connection structure for improving the stability of the shear outer wall of the staircase according to the claim 1, wherein: the staircase shear outer wall is provided with embedded threaded sleeves which are in one-to-one correspondence with the positions of the horizontal preformed holes on the side of the prefabricated staircase boards.
5. The prefabricated staircase connection structure for improving the stability of the shear outer wall of the staircase according to the claim 1, wherein: and (3) filling high-strength shrinkage-free mortar into the reserved vertical hole after the end part of the horizontal reserved hole is blocked and sealed, and sealing and connecting the two holes into a whole after the mortar is solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151753.6U CN213174527U (en) | 2020-09-27 | 2020-09-27 | Prefabricated staircase connection structure for improving stability of outer shear wall of staircase |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022151753.6U CN213174527U (en) | 2020-09-27 | 2020-09-27 | Prefabricated staircase connection structure for improving stability of outer shear wall of staircase |
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| CN213174527U true CN213174527U (en) | 2021-05-11 |
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| CN202022151753.6U Expired - Fee Related CN213174527U (en) | 2020-09-27 | 2020-09-27 | Prefabricated staircase connection structure for improving stability of outer shear wall of staircase |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789925A (en) * | 2021-09-23 | 2021-12-14 | 山东大学 | Fast-assembling steel pipe concrete superposed shear wall staircase and installation method |
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2020
- 2020-09-27 CN CN202022151753.6U patent/CN213174527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113789925A (en) * | 2021-09-23 | 2021-12-14 | 山东大学 | Fast-assembling steel pipe concrete superposed shear wall staircase and installation method |
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Granted publication date: 20210511 |