Prefabricated building shear wall assembly connecting structure

Abstract

The application relates to an assembled building shear wall assembly connecting structure, a floor is internally provided with a plurality of embedded steel bars, the bottom of a prefabricated shear wall is provided with a plurality of pouring grooves corresponding to the positions of the embedded steel bars, the pouring grooves are opened at the bottom of the prefabricated shear wall, the upper part of the pouring groove is provided with a communicating groove, the upper part of the communicating groove is provided with an operation groove, the operation groove is opened at the side of the prefabricated shear wall, the communicating groove is arranged between the operation groove and the pouring groove and is connected with the operation groove and the pouring groove, the pouring groove is provided with an extension screw rod, and the upper part of the extension screw rod is provided with a limiting nut; the extension screw rod comprises a steel sleeve joint connected with the embedded steel bar, and the upper part of the steel sleeve joint is integrally connected with a screw rod piece; the limiting nut comprises an internally-threaded sleeve pipe, the top of the internally-threaded sleeve pipe is provided with an outer hexagonal end, the bottom of the internally-threaded sleeve pipe is provided with a limiting flange, the outer hexagonal end, the internally-threaded sleeve pipe and the limiting flange are connected with each other, and the internally-threaded sleeve pipe is threadedly connected with the screw rod piece.

Description

Technical Field

[0001] This invention relates to an assembly and connection structure for prefabricated shear walls, and is applied in the field of prefabricated shear wall assembly technology. Background Technology

[0002] As is generally known, prefabricated construction mainly refers to buildings formed by transporting prefabricated building components directly to the construction site and connecting them using specific methods. Compared to traditional buildings, prefabricated construction has stricter requirements for connection methods and building stability. Compared to cast-in-place construction, prefabricated structures are more conducive to green construction because they better meet the requirements of green construction, such as saving land, energy, materials, and water, and protecting the environment. This reduces negative environmental impacts, including noise reduction, dust prevention, reduced pollution, cleaner transportation, less site disturbance, and conservation of water, electricity, materials, and other resources and energy, adhering to the principles of sustainable development. However, because the bottom surface of prefabricated shear walls cannot be completely flat during prefabrication, and the top surface of the floor slab may also have burrs and pits, the installation of prefabricated shear walls requires vertical positioning and fixing with the installed floor slab using certain connection structures. Current methods involve hoisting the shear walls with cranes and manually adjusting the wall position and verticality using simple pry bars, which is not only difficult to operate but also inefficient.

[0003] An invention patent with publication number CN106760052A discloses a prefabricated shear wall horizontal joint steel welding connection device, specifically describing it as mainly composed of upper connecting steel bars, lower connecting steel bars, upper steel sections, lower steel sections, upper connecting steel plates, and lower connecting steel plates. The connection between the steel sections and the connecting steel bars, as well as the fabrication of the prefabricated shear walls, are all prefabricated in the factory. On-site, only the upper and lower prefabricated shear walls need to be hoisted and spliced; the assembly of the upper and lower prefabricated shear walls can be completed by temporarily fixing the upper and lower steel sections. After on-site welding is completed, the prefabricated shear walls can continue to be assembled upwards. However, on the one hand, the above solution has a relatively complex structure and is inconvenient to operate; on the other hand, the above solution does not solve the technical problem proposed in this application. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an assembly and connection structure for prefabricated building shear walls. This structure solves the problems of difficult operation and low construction efficiency in adjusting the position and verticality of traditional prefabricated shear walls, and ensures that the concrete pouring completely fills the internal cavity of the shear wall, thereby guaranteeing the finished quality of the prefabricated shear wall.

[0005] The technical solution of the present invention is as follows:

[0006] A prefabricated shear wall assembly and connection structure for prefabricated buildings includes a floor slab and a prefabricated shear wall vertically arranged on the upper part of the floor slab. Several embedded steel bars are arranged inside the floor slab, with the top ends of the embedded steel bars protruding from the top surface of the floor slab. Several casting grooves corresponding to the positions of the embedded steel bars are provided at the bottom of the prefabricated shear wall. The casting grooves have openings at the bottom of the prefabricated shear wall. A connecting groove is provided at the upper part of the casting groove, and an operating groove is provided at the upper part of the connecting groove. The operating groove has a side opening on the side of the prefabricated shear wall. A vertically connected structure is installed between the operating trough and the pouring trough. An extension screw is installed inside the pouring trough, and a limit nut is installed on the upper part of the extension screw. The extension screw includes a rebar sleeve joint connected to the pre-embedded rebar, and a screw component is integrally connected to the upper part of the rebar sleeve joint. The limit nut includes an internally threaded sleeve, with an external hexagonal end at the top and a limit flange at the bottom. The external hexagonal end, the internally threaded sleeve, and the limit flange are vertically connected, and the internally threaded sleeve is threadedly connected to the screw component.

[0007] The embedded steel bars are evenly distributed in the area corresponding to the precast shear wall on the floor slab, and the embedded steel bars are connected to the top surface of the floor slab in a vertical structure.

[0008] The top of the pre-embedded steel bar is fitted with a steel bar sleeve joint, which is welded to the pre-embedded steel bar with the sleeve joint facing downward.

[0009] The cross-section of the connecting groove is smaller than that of the casting groove, and the connecting groove and the casting groove together form a stepped groove structure.

[0010] The outer diameter of the internal threaded sleeve of the limiting nut is smaller than the inner diameter of the connecting groove.

[0011] The edge ring of the limiting flange has several notches that form concrete channels.

[0012] The present invention has the following beneficial effects:

[0013] This invention solves the problems of difficult position and verticality adjustment and low construction efficiency of traditional precast shear walls by setting pre-embedded steel bars in the floor slab and further setting extension screws and limiting nuts in the precast shear wall. The extension screws are fixedly connected to the pre-embedded steel bars, while the limiting nuts are used to adjust the verticality of the precast shear wall. This invention also solves the problems of difficult position and verticality adjustment and low construction efficiency of traditional precast shear walls by setting operation grooves, connecting grooves, and pouring grooves in the precast shear wall. After the precast shear wall is adjusted, concrete is filled into the grooves to completely fill and compact the gaps between the precast shear wall and the floor slab, as well as the various grooves and cavities inside the shear wall, thereby ensuring construction quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the extension screw in this invention;

[0016] Figure 3 This is a schematic diagram of the limiting nut in this invention;

[0017] Figure 4 This is a schematic diagram showing the completed state of concrete pouring in this invention;

[0018] The reference numerals in the figure are as follows:

[0019] 1. Floor slab; 11. Embedded steel bars; 2. Precast shear wall; 21. Filling concrete; 3. Operating channel; 4. Connecting channel; 5. Pouring channel; 6. Extension bolt; 61. Steel bar sleeve joint; 62. Bolt fitting; 7. Limiting nut; 71. External hexagonal end; 72. Internal threaded sleeve; 73. Limiting flange; 74. Concrete channel. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] See Figures 1 to 4 The prefabricated shear wall assembly and connection structure includes a floor slab 1 and a prefabricated shear wall 2 vertically arranged on the upper part of the floor slab 1. Several embedded steel bars 11 are arranged inside the floor slab 1, with the top ends of the embedded steel bars 11 protruding from the top surface of the floor slab 1. Several casting grooves 5 corresponding to the positions of the embedded steel bars 11 are arranged at the bottom of the prefabricated shear wall 2. The casting grooves 5 have openings at the bottom of the prefabricated shear wall 2. A connecting groove 4 is arranged at the upper part of the casting groove 5, and an operating groove 3 is arranged at the upper part of the connecting groove 4. The operating groove 3 has a side opening on the side of the prefabricated shear wall 2 for inserting operating tools for fastening during installation. A connecting groove 4 is provided between the operating groove 3 and the casting groove 5 to allow vertical connection. An extension screw 6 is provided in the casting groove 5, and a limiting nut 7 is provided on the upper part of the extension screw 6. The extension screw 6 includes a steel bar sleeve joint 61 connected to the pre-embedded steel bar 11, and a screw member 62 is integrally connected to the upper part of the steel bar sleeve joint 61. The limiting nut 7 includes an internal threaded sleeve 72, an external hexagonal end 71 is provided at the top of the internal threaded sleeve 72, and a limiting flange 73 is provided at the bottom of the internal threaded sleeve 72. The external hexagonal end 71, the internal threaded sleeve 72 and the limiting flange 73 are vertically connected, and the internal threaded sleeve 72 is threadedly connected to the screw member 62.

[0022] The embedded steel bars 11 are evenly distributed in the area corresponding to the precast shear wall 2 on the floor slab 1, and the embedded steel bars 11 are vertically connected to the top surface of the floor slab 1. The embedded steel bars 11 serve as the connecting skeleton structure between the precast shear wall 2 and the floor slab 1.

[0023] The top end of the pre-embedded reinforcing bar 11 is fitted with a reinforcing bar sleeve joint 61, which is welded downwards to the pre-embedded reinforcing bar 11. In use, the screw rod 62 is facing upwards and the reinforcing bar sleeve joint 61 is facing downwards, and the screw rod 62 is adjusted to be close to a vertical state before the reinforcing bar sleeve joint 61 is fixedly welded to the top end of the pre-embedded reinforcing bar 11.

[0024] The cross-section of the connecting groove 4 is smaller than the cross-section of the casting groove 5, and the connecting groove 4 and the casting groove 5 together form a stepped groove structure.

[0025] The outer diameter of the internal threaded sleeve 72 of the limiting nut 7 is smaller than the inner diameter of the connecting groove 4.

[0026] The edge of the limiting flange 73 has several notches forming concrete channels 74.

[0027] Working principle of the invention:

[0028] When using this invention, first screw the corresponding number of limiting nuts 7 one by one onto the upper part of the extension screw 6, then lift the precast shear wall 2 and align it for lowering, so that the casting groove 5 on the bottom surface of the precast shear wall 2 corresponds to the extension screw 6, until the outer hexagonal end 71 of the upper part of the limiting nut 7 passes through the top of the connecting groove 4 inside the precast shear wall 2 and extends into the operating groove 3, while the limiting flange 73 abuts against the top of the casting groove 5 to form a limiting support. Further, according to the verticality of the wall surface of the precast shear wall 2, the height of the limiting nut 7 relative to the precast shear wall 2 is adjusted by turning the limiting nuts 7 on both sides, thereby realizing the verticality adjustment of the precast shear wall 2. In specific adjustment operations, an outer hexagonal wrench can be inserted from the side opening of the operating groove 3 and the outer hexagonal end 71 of the top of the limiting nut 7 can be turned. The position adjustment of the precast shear wall 2 is assisted by hoisting with a crane. After the adjustment of the precast shear wall 2 is completed, the pouring operation is carried out. Concrete is poured from the operating groove 3, so that the filling concrete 21 gradually fills the gap between the precast shear wall 2 and the floor slab 1, the pouring groove 5, the connecting groove 4 and the operating groove 3 from bottom to top. The operating groove 3 can be filled with the assistance of formwork. In order to ensure that the filling concrete 21 flows smoothly in each groove, the outer diameter of the inner thread sleeve 72 of the limiting nut 7 is smaller than the inner diameter of the connecting groove 4, and the edge of the limiting flange 73 is provided with several notches as concrete channels 74, so as to ensure that the concrete pouring can completely fill the internal cavity of the precast shear wall 2, thereby ensuring the compactness of the filling concrete 21 and ensuring the construction quality.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A prefabricated shear wall assembly connection structure for prefabricated buildings, comprising a floor slab (1) and a prefabricated shear wall (2) vertically disposed on the upper part of the floor slab (1), characterized in that: The floor slab (1) is provided with several embedded steel bars (11) inside, and the top of the embedded steel bars (11) protrudes from the top surface of the floor slab (1). The bottom of the precast shear wall (2) is provided with several casting grooves (5) corresponding to the positions of the embedded steel bars (11). The casting grooves (5) are open at the bottom of the precast shear wall (2). A connecting groove (4) is provided at the upper part of the casting grooves (5). An operating groove (3) is provided at the upper part of the connecting grooves (4). The operating groove (3) is open on the side of the precast shear wall (2). The connecting groove (4) is provided between the operating groove (3) and the casting grooves (5) to allow vertical connection. An extension screw (6) is provided inside, and a limit nut (7) is provided on the upper part of the extension screw (6); the extension screw (6) includes a steel bar sleeve joint (61) connected to the pre-embedded steel bar (11), and a screw member (62) is integrally connected to the upper part of the steel bar sleeve joint (61); the limit nut (7) includes an internal threaded sleeve (72), the top of the internal threaded sleeve (72) is provided with an external hexagonal end (71), and the bottom of the internal threaded sleeve (72) is provided with a limit flange (73). The external hexagonal end (71), the internal threaded sleeve (72) and the limit flange (73) are connected vertically, and the internal threaded sleeve (72) is threadedly connected to the screw member (62).

2. The prefabricated building shear wall assembly connection structure as described in claim 1, characterized in that: The embedded steel bars (11) are evenly distributed in the area corresponding to the precast shear wall (2) on the floor slab (1), and the embedded steel bars (11) are vertically connected to the top surface of the floor slab (1).

3. The prefabricated building shear wall assembly connection structure as described in claim 2, characterized in that: The top end of the pre-embedded steel bar (11) is fitted with a steel bar sleeve joint (61), which is welded to the pre-embedded steel bar (11) with the steel bar sleeve joint (61) facing downward.

4. The prefabricated building shear wall assembly connection structure as described in claim 1, characterized in that: The cross-section of the connecting groove (4) is smaller than the cross-section of the casting groove (5), and the connecting groove (4) and the casting groove (5) together form a stepped groove structure.

5. The prefabricated building shear wall assembly connection structure as described in claim 1, characterized in that: The outer diameter of the inner threaded sleeve (72) of the limiting nut (7) is smaller than the inner diameter of the connecting groove (4).

6. The prefabricated building shear wall assembly connection structure as described in claim 1, characterized in that: The edge of the limiting flange (73) has several notches for concrete channels (74).

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