Prefabricated hollow shear wall structure

Abstract

The utility model relates to the field of prefabricated shear wall structures, and discloses a prefabricated hollow shear wall structure which comprises a wall body, a hollow hole is formed in the top of the wall body, a transverse bar is transversely and fixedly connected to the interior of the wall body, a connecting bar is fixedly connected to the transverse bar, and a sleeve is fixedly connected to the other end of the connecting bar. A connecting groove is formed in the bottom of the sleeve, a grouting pipe is fixedly connected to the side edge of the sleeve, a joint bar is fixedly connected to the top of the sleeve, a sealing bar is vertically and fixedly connected to the interior of the wall body, a limiting hole is formed in the bottom of the wall body, and a positioning block is fixedly connected to the edge side of the hollow hole. In the utility model, the top ends of the positioning blocks and the top ends of the sealing ribs are positioned above the elevation to realize quick positioning of the lower-layer wall body, and all parts are matched after the upper-layer wall body is hoisted, so that manual paying-off errors are reduced; the sleeve and the connecting rib in the hollow hole improve the anti-offset and anti-shear performance of the wall body, the baffle and the sleeve are matched to cast and fix the joint bars in a segmented mode, and the structural strength and the installation precision are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of precast shear wall structures, and in particular to a precast hollow shear wall structure. Background Technology

[0002] With the rapid development of industrialization and prefabrication in the construction industry, precast shear walls have been widely used in high-rise buildings and prefabricated residential buildings due to their advantages such as high construction efficiency, stable quality, energy saving, and environmental protection. The installation quality and construction efficiency of precast shear walls directly affect the stability of the overall building structure and the progress of the project.

[0003] Currently, in the installation of precast shear walls connecting upper and lower floors, traditional methods rely heavily on manual layout and positioning. This process is cumbersome and susceptible to human error, leading to significant positioning errors. This not only reduces construction efficiency but may also affect the accuracy of wall connections and structural stability. Furthermore, existing technologies are limited in enhancing the resistance to displacement and shear strength of walls on adjacent floors, failing to meet increasingly stringent building safety standards. In addition, conventional construction procedures for fixing reinforcing bars during concrete pouring are complex, with the bottom formwork step being time-consuming and labor-intensive, and it is difficult to ensure dense concrete pouring, affecting the structural strength and installation accuracy of the wall. Therefore, there is an urgent need for a technical solution that can achieve rapid positioning and connection of precast shear walls, improving shear performance and construction efficiency.

[0004] In response to this technical problem, this application proposes a precast hollow shear wall structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a prefabricated hollow shear wall structure. This structure achieves rapid positioning of the lower wall by ensuring the tops of the positioning blocks and the closing reinforcement bars are above the designated elevation. After the upper wall is hoisted, the various components work together, reducing errors from manual layout and improving construction efficiency and stability. Simultaneously, the sleeves and connecting reinforcement bars within the hollow cavity enhance the wall's resistance to displacement and shear. The baffles and sleeves work together to cast and fix the reinforcing bars in sections, simplifying the process, ensuring structural strength and installation accuracy, and improving construction efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A precast hollow shear wall structure includes a wall body with a hollow opening at the top. Horizontal reinforcing bars are fixedly connected horizontally inside the wall body, and connecting reinforcing bars are fixedly connected to the horizontal reinforcing bars. A sleeve is fixedly connected to the other end of each connecting reinforcing bar, and a connecting groove is provided at the bottom of the sleeve. A grouting pipe is fixedly connected to the side of the sleeve, and a dowel bar is fixedly connected to the top of the sleeve. A closing reinforcing bar is fixedly connected vertically inside the wall body. A limiting opening is provided at the bottom of the wall body, and a positioning block is fixedly connected to the edge of the hollow opening. A limiting block is fixedly connected to the top of the positioning block, and a limiting groove is provided at the bottom of the positioning block. A baffle is fixedly connected to the bottom of the wall body.

[0008] Furthermore, the outer wall of the sleeve is disposed inside the hollow cavity, and the outer wall of the grouting pipe is fixedly connected to the inside of the wall.

[0009] Furthermore, the outer wall of the top end of the insert is disposed inside the connecting groove of the adjacent layer, the outer wall of the lower half of the insert is disposed inside the hollow cavity, and the outer wall of the upper half of the insert is disposed inside the hollow cavity of the adjacent layer.

[0010] Furthermore, the outer wall of the lower vertical section of the closed rib is fixedly connected to the inner wall of the side of the horizontal rib, the outer wall of the bent section at the top of the closed rib is set inside the limiting hole of the adjacent layer, and the outer wall of the limiting block is set inside the limiting groove of the adjacent layer.

[0011] Furthermore, stirrups are fixedly connected to the upper side of the outer wall of the transverse reinforcement to tie the front and rear steel mesh of the wall.

[0012] Furthermore, an embedded nut is fixedly connected to the front side of the wall, and a lifting point is fixedly connected to the top of the wall.

[0013] Furthermore, the wall is vertically fixedly connected with longitudinal ribs, and the outer wall of the longitudinal ribs is set on the inner wall of the transverse ribs.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, by positioning the top of the positioning block and the top of the closing reinforcement above the elevation, the approximate position of the lower wall can be quickly determined; the upper wall is hoisted by a tower crane, and the closing reinforcement and connecting reinforcement are inserted into the corresponding hollow holes. The limiting block at the top of the positioning block is embedded in the limiting groove, and the top of the closing reinforcement is inserted into the limiting hole for overlap, thereby realizing the rapid positioning, connection and installation of the upper and lower walls, reducing manual layout and errors, ensuring accurate positioning, and improving construction efficiency and structural stability.

[0016] 2. In this utility model, by installing a sleeve with connecting bars inside the hollow cavity, the anti-displacement limit and shear strength of the walls on adjacent floors are achieved; by setting baffles, sleeves, etc. to pour concrete in sections, the reinforcing bars are fixed, reducing the bottom formwork steps and improving the effect of dense concrete pouring; this not only ensures the structural strength and installation accuracy of the wall, but also simplifies the construction process and improves the construction efficiency and stability of the precast shear wall. Attached Figure Description

[0017] Figure 1 This is a perspective view of a prefabricated hollow shear wall structure proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the stirrups in a prefabricated hollow shear wall structure proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of a limiting groove for a prefabricated hollow shear wall structure proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of a sleeve for a prefabricated hollow shear wall structure proposed in this utility model.

[0021] Legend:

[0022] 1. Wall; 2. Hollow cavity; 3. Horizontal reinforcement; 4. Closed reinforcement; 5. Inserted reinforcement; 6. Positioning block; 7. Limiting block; 8. Grouting pipe; 9. Longitudinal reinforcement; 10. Limiting groove; 11. Limiting hole; 12. Baffle; 13. Embedded nut; 14. Sleeve; 15. Connecting reinforcement; 16. Connecting groove; 17. Lifting point; 18. Stirrup. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-3A precast hollow shear wall structure includes a wall body 1, a hollow hole 2 at the top of the wall body 1, horizontal reinforcing bars 3 fixedly connected horizontally inside the wall body 1, connecting reinforcing bars 15 fixedly connected to the horizontal reinforcing bars 3, a sleeve 14 fixedly connected to the other end of the connecting reinforcing bars 15, a connecting groove 16 at the bottom of the sleeve 14, a grouting pipe 8 fixedly connected to the side of the sleeve 14, an insert reinforcing bar 5 fixedly connected to the top of the sleeve 14, a closing reinforcing bar 4 fixedly connected vertically inside the wall body 1, a limiting hole 11 at the bottom of the wall body 1, a positioning block 6 fixedly connected to the edge of the hollow hole 2, a limiting block 7 fixedly connected to the top of the positioning block 6, a limiting groove 10 at the bottom of the positioning block 6, and a baffle 12 fixedly connected to the bottom of the wall body 1.

[0025] Specifically, during the construction of precast shear walls, positioning the lower wall 1 becomes difficult after the lower composite slab is poured, affecting the precise alignment of the upper and lower shear walls. To solve this problem and achieve rapid positioning, the construction process involves first overlapping the composite slab onto the side of wall 1, tying the reinforcing bars to the closing reinforcement 4 and the dowel bars 5, and then pouring concrete to the design elevation. At this point, the top of the positioning block 6 and the top of the closing reinforcement 4 both extend beyond the concrete pouring surface. Based on this feature, the approximate position of the lower wall 1 can be determined. Next, the upper wall 1 is hoisted to the corresponding area using a tower crane. The upper ends of the closing reinforcement 4 and the dowel bars 5 are accurately aligned with the hollow holes 2 of the upper wall 1. Then, the wall 1 is slowly lowered, allowing the closing reinforcement 4 and the dowel bars 5 to smoothly insert into the hollow holes 2. At the same time, the arc edge of the hollow hole 2 on the edge of the wall 1 is precisely aligned with the part of the positioning block 6 that protrudes above the concrete surface, causing the limiting block 7 at the top of the positioning block 6 to embed. The locating block 6 is inserted into the limiting groove 10 of the upper wall 1. During this process, the part of the closing reinforcement 4 that protrudes above the concrete surface will be inserted into the limiting hole 11 at the bottom of the upper wall 1, and overlap with the bottom end of the upper closing reinforcement 4. Since the upper wall 1 is spliced ​​with a shim to leave a gap, the part of the positioning block 6 that protrudes above the concrete surface only plays a positioning function and will not be tightly fitted with the inner wall of the hollow hole 2 of the upper wall 1. At most, there will be only a small overlap. A gap is also reserved between the limiting block 7 and the limiting groove 10. This design can ensure that when the concrete is poured later, the concrete can pass smoothly through the gaps between the components, fully wrap the wall 1, form a solid whole, and ensure the stability of the structure. Through the above operation, the positioning, connection and installation of the upper and lower walls 1 can be completed efficiently, eliminating the manual layout process and effectively avoiding the errors caused by manual layout, thereby ensuring the precise alignment of the upper and lower shear walls.

[0026] Reference Figures 2-4The outer wall of the sleeve 14 is located inside the hollow cavity 2, and the outer wall of the grouting pipe 8 is fixedly connected to the inside of the wall 1. The outer wall of the top of the reinforcing bar 5 is located inside the adjacent layer connecting groove 16, the outer wall of the lower half of the reinforcing bar 5 is located inside the hollow cavity 2, and the outer wall of the upper half of the reinforcing bar 5 is located inside the adjacent layer hollow cavity 2. The outer wall of the lower vertical section of the closing bar 4 is fixedly connected to the inner wall of the side of the horizontal bar 3, the outer wall of the bent section at the top of the closing bar 4 is located inside the adjacent layer limiting hole 11, and the outer wall of the limiting block 7 is located inside the adjacent layer limiting groove 10. A stirrup 18 is fixedly connected to the upper side of the outer wall of the horizontal bar 3 for tying the front and rear steel mesh of the wall 1. An embedded nut 13 is fixedly connected to the front side of the wall 1, and a lifting point 17 is fixedly connected to the top of the wall 1. A longitudinal bar 9 is fixedly connected vertically inside the wall 1, and the outer wall of the longitudinal bar 9 is located on the inner wall of the horizontal bar 3.

[0027] Specifically, the internal structure of wall 1 includes horizontal reinforcement 3, longitudinal reinforcement 9, and closing reinforcement 4. The longitudinal reinforcement 9 is located in the area of ​​wall 1 without hollow openings 2, with no steel bars extending from either end. The closing reinforcement 4 is located in the area of ​​wall 1 with hollow openings 2, with steel bars extending from the top and closing the opening. Both the longitudinal reinforcement 9 and the closing reinforcement 4 are located inside the horizontal reinforcement 3, and the three overlap to form a steel mesh. On the front and rear steel meshes of wall 1, the overlaps between the longitudinal reinforcement 9 and the horizontal reinforcement 3 are connected by stirrups 18, thus firmly bonding the two meshes and improving the overall structural stability. For hollow precast shear walls, to prevent displacement of adjacent floor walls 1 and to increase the shear strength at the connection point between adjacent floors, a sleeve 14 is installed inside the hollow opening 2. A connecting reinforcement 15 is fixedly connected to the outer wall of the sleeve 14, and this connecting reinforcement 15 is connected to the front and rear steel meshes inside wall 1. The bend of the connecting bar 15 wraps around the junction of the horizontal bar 3 and the closing bar 4, serving not only the same reinforcement function as the stirrup 18, but also stabilizing the position of the sleeve 14 within the hollow cavity 2. One end of the grouting pipe 8 is connected to the sleeve 14, and the other end penetrates the wall 1, extending to one side of the wall 1 to provide a channel for subsequent grouting operations. The connecting bar 5 is fixed on the sleeve 14. The wall 1 is hoisted using a crane through the lifting point 17. After the wall 1 is positioned and calibrated, it is slowly lowered so that the top of the connecting bar 5 is inserted into the connecting groove 16 of the upper layer, achieving temporary positioning. Then, the position and angle of the wall 1 are finely adjusted until the design requirements are met. Subsequently, the bracket is used to connect the embedded nut 13 to provide support for the wall 1 and keep it stable. At this time, grouting is performed through the grouting pipe 8 on the lower side. Due to the blocking effect of the baffle 12, the concrete will not leak from the wall 1, and it can ensure that the concrete is in full contact with the wall 1 and the bottom floor slab. Concrete is continuously poured. When concrete begins to overflow from the upper grouting pipe 8, it indicates that the lower part of the grouting pipe 8 has been compacted and the reinforcing bars 5 are completely encased in concrete within the connecting groove 16. The grouting pipe 8 is then sealed to prevent concrete overflow. After the installation of the composite slab at the top of the subsequent wall 1 and the binding of the upper reinforcing bars are completed, the interior of the wall 1 can continue to be poured through the top of the hollow hole 2. This achieves rapid positioning of the wall 1, increases the shear strength between adjacent layers of the wall 1, and facilitates the pouring operation of the hollow hole 2 inside the wall 1. The baffle 12 reduces the need for additional formwork at the bottom of the wall 1.

[0028] Working Principle: In the construction of precast shear walls, when the lower layer of wall 1 is difficult to position after the completion of the cast-in-place layer of the lower composite slab, the structural component characteristics and installation process are used to achieve precise positioning and stable connection. Specifically, the composite slab is first overlapped on the side of wall 1, and the reinforcing bars are tied to the closing bars 4 and the dowel bars 5, and concrete is poured so that the top of the positioning block 6 and the top of the closing bars 4 exceed the concrete pouring surface, thereby determining the approximate position of the lower wall 1 and providing a foundation reference for the installation of the upper wall 1. After the upper wall 1 is hoisted to the corresponding area, precise positioning is achieved through the cooperation of the closing bars 4, the dowel bars 5 and the hollow holes 2, and the positioning block 6 and the limiting blocks 7 and the limiting grooves 10. The upper ends of the closing bars 4 and the dowel bars 5 are aligned with the hollow holes 2 of the upper wall 1 and inserted to achieve vertical reinforcement connection; the limiting block 7 at the top of the positioning block 6 is embedded in the limiting groove 10 of the upper wall 1, and at the same time, the arc edge of the hollow hole 2 at the edge of the wall 1 is aligned with the higher part of the positioning block 6 to ensure precise horizontal alignment. The upper wall 1 has pre-reserved gaps to prevent the positioning block 6 and limiting block 7 from being tightly fitted to the inner wall of the hollow cavity 2, leaving space for subsequent concrete pouring and ensuring that the concrete can fully enclose the wall 1 to form a solid whole. The internal structure of the wall 1 also ensures its stable connection. The horizontal bars 3, longitudinal bars 9, and closing bars 4 overlap to form a steel mesh, and the front and rear meshes are connected by stirrups 18. The sleeve 14 of the hollow precast shear wall is connected to the steel mesh by connecting bars 15, which not only strengthens the structure but also stabilizes the position of the sleeve. The grouting pipe 8 provides a channel for grouting operations. During hoisting, the reinforcing bar 5 is inserted into the upper connecting groove 16 for temporary positioning. After adjusting the position and angle of the wall 1, it is supported and fixed by the bracket and the embedded nut 13. Grouting is then performed from the lower grouting pipe 8, and the baffle 12 prevents concrete leakage. When concrete overflows from the upper grouting pipe 8, it indicates that the grouting is dense and the reinforcing bar 5 is fully wrapped. Subsequently, the interior of the wall 1 is poured through the top of the hollow hole 2 to complete the entire construction process. Through the coordinated operation of various components, manual layout is eliminated, errors are avoided, and the precast shear wall is quickly positioned, accurately aligned, and efficiently installed. At the same time, it facilitates the pouring operation of the hollow hole 2 inside the wall 1 and ensures the stability of the structure.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precast hollow shear wall structure, comprising a wall (1), characterized in that: The wall (1) has a hollow hole (2) at the top. A horizontal rib (3) is fixedly connected to the inside of the wall (1). A connecting rib (15) is fixedly connected to the horizontal rib (3). A sleeve (14) is fixedly connected to the other end of the connecting rib (15). A connecting groove (16) is opened at the bottom of the sleeve (14). A grouting pipe (8) is fixedly connected to the side of the sleeve (14). A reinforcing rib (5) is fixedly connected to the top of the sleeve (14). A closing rib (4) is fixedly connected vertically inside the wall (1). A limiting hole (11) is opened at the bottom of the wall (1). A positioning block (6) is fixedly connected to the edge of the hollow hole (2) on the edge side. A limiting block (7) is fixedly connected to the top of the positioning block (6). A limiting groove (10) is opened at the bottom of the positioning block (6). A baffle (12) is fixedly connected to the bottom of the wall (1).

2. The precast hollow shear wall structure according to claim 1, characterized in that: The outer wall of the sleeve (14) is set inside the hollow hole (2), and the outer wall of the grouting pipe (8) is fixedly connected to the inside of the wall (1).

3. A prefabricated hollow shear wall structure according to claim 1, characterized in that: The top outer wall of the insert (5) is set inside the adjacent layer connecting groove (16), the lower half of the outer wall of the insert (5) is set inside the hollow hole (2), and the upper half of the outer wall of the insert (5) is set inside the adjacent layer hollow hole (2).

4. A precast hollow shear wall structure according to claim 1, characterized in that: The lower vertical section of the closed reinforcement (4) is fixedly connected to the inner wall of the side of the horizontal reinforcement (3). The outer wall of the bent section at the top of the closed reinforcement (4) is set inside the adjacent layer limiting hole (11). The outer wall of the limiting block (7) is set inside the adjacent layer limiting groove (10).

5. A precast hollow shear wall structure according to claim 1, characterized in that: The upper side of the outer wall of the transverse reinforcement (3) is fixedly connected with stirrups (18) to tie the front and rear steel mesh of the wall (1).

6. A precast hollow shear wall structure according to claim 1, characterized in that: The front side of the wall (1) is fixedly connected with an embedded nut (13), and the top of the wall (1) is fixedly connected with a lifting point (17).

7. A prefabricated hollow shear wall structure according to claim 1, characterized in that: The wall (1) is vertically fixed with longitudinal reinforcement (9) inside, and the outer wall of the longitudinal reinforcement (9) is set on the inner wall of the transverse reinforcement (3).

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