Cavity shear wall and shear wall

Abstract

The utility model relates to a cavity shear wall, and belongs to the technical field of shear walls. The cavity shear wall comprises a plurality of reinforcing meshes, a first wall plate and a second wall plate, the first wall plate and the second wall plate are oppositely arranged, a cavity is formed between the first wall plate and the second wall plate, the reinforcing meshes are located in the cavity, and a plurality of connecting pieces are arranged on the end face, facing the reinforcing meshes, of the first wall plate. The second wall plate is provided with a locking part matched with the connecting piece, the first wall plate and the second wall plate are each provided with a plurality of concave structures, and the cavities and the concave structures form matched cavities. According to the scheme provided by the utility model, the connection strength between the rear concrete layer and the wallboard can be enhanced through the sunken structure, and the problem that the integrity of the cavity shear wall and the post-poured concrete is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shear walls, and specifically relates to a cavity shear wall and a shear wall. Background Art

[0002] The shear wall in prefabricated buildings is a wall used to bear loads, and mainly bears vertical loads and horizontal loads caused by wind loads or seismic actions in houses or structures. The main structure of the cavity shear wall is assembled in the factory, and the cavity shear wall is installed at intervals on the construction site, and together with the post-cast reinforced concrete at both ends, it forms a wall for bearing loads. However, due to the existence of a local cold joint with the same thickness as the cavity wall panel between the cavity shear wall and the post-cast part, it has a certain impact on the bearing capacity of the overall shear wall when bearing horizontal loads, and even endangers the safety of the house. Content of the Utility Model

[0003] In order to overcome the problems existing in the related technologies, the utility model provides a cavity shear wall, which can strengthen the connection between the shear wall and the concrete in the matching cavity and the concrete on both sides of the matching cavity through the concave structure, improve the load strength of the overall shear wall, and the HPC or UHPC material used can further improve the structural strength of the cavity shear wall.

[0004] The utility model provides a cavity shear wall in a first aspect, which includes a plurality of steel bar meshes and a first wall panel and a second wall panel arranged oppositely. A cavity is formed between the first wall panel and the second wall panel, and a plurality of the steel bar meshes are located in the cavity. A plurality of connecting pieces are arranged on the first wall panel, and the second wall panel is provided with a locking part cooperating with the connecting pieces. The first wall panel and the second wall panel are both provided with a plurality of concave structures, and the cavity and the concave structures form a matching cavity.

[0005] The first wall panel and the second wall panel are both made of UHPC or concrete material.

[0006] In a possible implementation of the above first aspect, the concave structure includes a first concave part and a second concave part.

[0007] Along the thickness direction of the cavity shear wall, one end surface of the first wall panel and the second wall panel facing the steel bar mesh is recessed inward to form the first concave part.

[0008] Along the width direction of the cavity shear wall, both side surfaces of the first wall panel and the second wall panel are recessed inward to form the second concave part.

[0009] In a possible implementation of the above first aspect, the vertical section of the concave structure includes at least one of a circular arc shape, a rectangular shape, a conical shape, and a trapezoidal shape.

[0010] In a possible implementation of the above first aspect, the connecting member includes a fixed steel rod and a limiting steel pipe. The fixed steel rod is arranged in an L-shaped structure. The first end of the fixed steel rod is buried in the first wall panel, and the second end is exposed outside the first wall panel, and the axis of the second end is perpendicular to the plane of the first wall panel; the limiting steel pipe is detachably connected to the fixed steel rod.

[0011] In a possible implementation of the above first aspect, the locking portion includes a steel ring and a fastener. A plurality of mounting holes corresponding to the limiting steel pipe are provided on the second wall panel, and the steel ring is embedded in the mounting holes;

[0012] A boss is provided at one end of the limiting steel pipe away from the first wall panel. An external thread is provided on the outer periphery of the boss. The diameter of the boss is smaller than the inner diameter of the steel ring, and the diameter of the limiting steel pipe is larger than the inner diameter of the steel ring. The boss connects the fastener.

[0013] A small-diameter hole cavity and a large-diameter hole cavity are provided inside the steel ring. The diameter of the small-diameter hole is larger than the outer diameter of the boss. The small-diameter hole is close to the steel bar mesh. When the fastener and the boss are in a tightly fitting state, the head of the fastener is accommodated in the large-diameter hole cavity.

[0014] In a possible implementation of the above first aspect, a plurality of outwardly extending protrusions are further provided on the end faces of the first wall panel and the second wall panel facing the steel bar mesh. The height of the protrusions is equal to the height of the fixed steel rod exposed outside the first wall panel.

[0015] In a possible implementation of the above first aspect, the steel bar mesh includes a plurality of longitudinally arranged steel bars spaced apart from each other and a plurality of transversely arranged steel bars spaced apart from each other. A plurality of the longitudinally arranged steel bars connect the connecting members, and a plurality of the transversely arranged steel bars connect the longitudinally arranged steel bars.

[0016] In a possible implementation of the above first aspect, a positioning structure is further included for assisting in installing the longitudinally arranged steel bars. The positioning structure includes a clamp and a fixing ring. The fixing ring connects the clamp. The clamp is sleeved on the connecting member, and the longitudinally arranged steel bar is accommodated in the opening of the fixing ring.

[0017] The second aspect of the present utility model lies in providing a shear wall, including the above cavity shear wall and concrete located inside the cavity shear wall.

[0018] The technical solution provided by the present utility model may include the following beneficial effects:

[0019] (1) Without increasing additional manufacturing costs, the connection strength between the concrete at both ends of the shear wall and the concrete within the shear wall and the cavity is strengthened through the recessed structure, enhancing the load-bearing and seismic performance of the shear wall.

[0020] (2) For the cavity shear wall provided by the present utility model, the first wall panel and the second wall panel are made of UHPC or HPC materials. Under the same performance parameters, not only can the thickness of the wall panel be reduced, but also the need to set up steel bar trusses or profiled steels within the wall panel can be eliminated, saving project costs and improving production efficiency. Description of the Drawings

[0021] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present utility model will become more apparent. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0022] Figure 1 is a schematic structural diagram of the cavity shear wall provided by the present utility model;

[0023] Figure 2 is a schematic structural diagram of the first recessed portion provided by the present utility model;

[0024] Figure 3 is a schematic structural diagram of the second recessed portion provided by the present utility model;

[0025] Figure 4 is a schematic structural diagram of the connecting member provided by the present utility model;

[0026] Figure 5 is a cross-sectional view of the steel ring provided by the present utility model;

[0027] Figure 6 is a schematic structural diagram of the positioning structure provided by the present utility model;

[0028] Figure 7 is a cross-sectional view of the positioning structure provided by the present utility model. Description of the Drawings:

[0030] 1. First wall panel; 2. Steel mesh; 3. Second wall panel;

[0031] 4. Connecting member; 41. Fixed steel rod; 42. Limiting steel pipe; 420. Boss;

[0032] 5. Locking portion; 51. Steel ring; 511. Small-diameter hole cavity; 512. Large-diameter hole cavity; 52. Fastener;

[0033] 6. Recessed structure; 61. First recessed portion; 62. Second recessed portion;

[0034] 7. Protrusion;

[0035] 8. Positioning structure; 81. Clamp; 82. Fixed ring. Detailed implementation manner

[0036] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] In the prior art, the development of shear walls often focuses on higher assembly efficiency and material cost solutions that balance performance, while neglecting the connection performance between the concrete layer and the shear wall. The inventor found during the research on cavity shear walls that the bonding strength between the wall panel and the concrete layer was not satisfactory. When applying seismic tests to it, extremely fine slippage or loosening would occur in the concrete layers on both sides of the shear wall and in the concrete layer inside the shear wall. In this case, in order to improve the connection strength between the shear wall and the concrete, the inventor simplified the assembly method of the shear wall and used ultra-high performance concrete (UHPC), high performance concrete (HPC), and ordinary concrete materials as the wall panels of the shear wall. Without changing the thickness of the wall, the concrete layer has a higher load-bearing capacity. At the same time, an interlocking contact surface is constructed between the concrete layer and the wall panel installation surface, further improving the bonding strength between the concrete and the shear wall without changing the material properties of the concrete layer.

[0041] The technical solutions of the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0042] Figure 1 It is a schematic structural diagram of a cavity shear wall shown in the embodiments of the present utility model.

[0043] As Figure 1 shown, a cavity shear wall provided in Embodiment 1 of the present utility model includes a plurality of steel bar meshes 2 and a first wall panel 1 and a second wall panel 3 that are oppositely arranged. A cavity is formed between the first wall panel 1 and the second wall panel 3. A plurality of the steel bar meshes 2 are located in the cavity. A plurality of connecting members 4 are provided on the first wall panel 1, and a locking portion 5 that cooperates with the connecting members 4 is provided on the second wall panel 3. A plurality of concave structures 6 are provided on both the first wall panel 1 and the second wall panel 3. The cavity and the concave structures 6 form a cooperating cavity;

[0044] Both the first wall panel 1 and the second wall panel 3 are made of UHPC or concrete materials.

[0045] The first wall panel 1 and the second wall panel 3 have two end faces and four side faces. Among them, the two end faces are the wall panel installation surface and the wall panel exterior surface. For the oppositely arranged first wall panel 1 and second wall panel 3, one of the opposite end faces is the wall panel installation surface. The steel bar meshes 2 are fixed between the first wall panel 1 and the second wall panel 3 by connecting the connecting members 4. The number of the steel bar meshes 2 can be freely set according to the thickness of the cavity shear wall.

[0046] As Figure 2 and Figure 3As shown, the recessed structures 6 of the first wall panel 1 and the second wall panel 3 can be provided on the wall panel installation surface, or on the four side surfaces of the wall panel. At the same time, the recessed structures 6 can also be provided on both the wall panel installation surface and the four side surfaces. Specifically, when the recessed structure 6 is provided on the wall panel installation surface, the recessed structure 6 is recessed inward along the thickness direction of the first wall panel 1 and the second wall panel 3 on the wall panel installation surface; when the recessed structure 6 is provided on the four side surfaces of the wall panel, it is recessed inward on the four side surfaces of the wall panel. By providing the above-mentioned recessed structures 6, a mating cavity is formed with the chamber. After pouring concrete, the solidified concrete layer forms an uneven and rough contact surface in the chamber and the recessed structures 6. The concrete layer can be engaged with the first wall panel 1 and the second wall panel 3 respectively, and the cavity wall panel and the post-cast reinforced concrete parts at both ends can also achieve toothed engagement, improving the connection strength between the concrete layer and the shear wall, and avoiding the problem of the connection node between the concrete and the wall panel failing and causing the concrete layer to slip.

[0047] Next, the specific assembly work of the cavity shear wall will be described in detail for the case where the number of steel bar meshes 2 is two.

[0048] Specifically, the manufacturing process of the above-mentioned cavity shear wall is as follows: First, manufacture the templates of the first wall panel 1 and the second wall panel 3 according to the design drawings. After the templates are placed on the manufacturing table, install the corresponding fixtures, blocks and molds on the templates according to the requirements of the design drawings. The fixtures are used to fix the connecting members 4 so that the connecting members 4 can be suspended above the mold cavity of the template; the blocks can be suspended or attached to the surface of the mold cavity according to the specific structure of the recessed structure 6. The molds are placed on the template of the second wall panel 3 to form the locking portions 5. Then pour UHPC or concrete materials into the mold cavity, and cure and form the first wall panel 1 installed with the connecting members 4 and the second wall panel 3 installed with the locking portions 5. Then fix the steel bars by tying or welding according to the spacing dimensions of the connecting members 4 to manufacture the steel bar meshes 2 of specific specifications.

[0049] After placing the first wall panel 1 on the assembly site, lay the first steel bar mesh 2 on the first wall panel 1. The steel bars of the steel bar mesh 2 abut against the connecting members 4, and then install and fix the steel bar mesh 2 on the connecting members 4 by tying or welding. Install the second steel bar mesh 2 in the same way. After that, lift the second wall panel 3 by hoisting, align the locking portions 5 with the ends of the connecting members 4, and fix them by welding or bolt connection to complete the manufacture of the cavity shear wall.

[0050] When installing the shear wall at the construction site, it can be carried out according to the existing method and according to the construction drawings. The two precast shear walls are arranged at intervals, and steel bar meshes are installed at the intervals, and then sealed with splints to form a wall body for pouring concrete. After pouring concrete, an integral shear wall is formed.

[0051] Compared with the prior art, the first wall panel 1 and the second wall panel 3 provided by the utility model are made of UHPC or HPC materials, and have super mechanical properties, high toughness, ultra-high durability and excellent casting and forming properties, eliminating the need for structural reinforcement members such as steel bar trusses and profiled steels. A number of recessed structures 6 are provided on the first wall panel 1 and the second wall panel 3, and the cast concrete can fill the grooves, changing the flat contact surface between the original concrete and the first wall panel 1 and the second wall panel 3 into a contact surface that can achieve mutual engagement, avoiding the problem of connection node failure between the concrete and the wall panel.

[0052] In a preferred embodiment, the recessed structure 6 of the cavity shear wall includes a first recessed portion 61 and a second recessed portion 62;

[0053] Along the thickness direction of the cavity shear wall, one end surface of the first wall panel 1 and the second wall panel 3 facing the steel mesh 2 is recessed inward to form the first recessed portion 61;

[0054] Along the width direction of the cavity shear wall, both side surfaces of the first wall panel 1 and the second wall panel 3 are recessed inward to form the second recessed portion 62.

[0055] Furthermore, the vertical cross-section of the recessed structure 6 of the cavity shear wall includes at least one of an arc shape, a rectangle, a cone and a trapezoid.

[0056] In practical applications, the thickness specification range of the shear wall is generally between 200 mm and 600 mm, and changes in multiples of 50 mm. In order to make the cavity shear wall provided by the utility model adapt to the above thickness specifications and to reduce the storage space of the wall panels, on the basis of the above specific implementation manner, as Figure 3 shown, the connecting member 4 of the cavity shear wall includes a fixed steel rod 41 and a limiting steel pipe 42. The fixed steel rod 41 is arranged in an L-shaped structure. The first end of the fixed steel rod 41 is buried in the first wall panel 1, and the second end is exposed from the first wall panel 1, and the axis of the second end is perpendicular to the plane of the first wall panel 1; the limiting steel pipe 42 is detachably connected to the fixed steel rod 41. After the fixed steel rod 41, the limiting steel pipe 42, the first wall panel 1 and the second wall panel 3 are assembled, it forms a cavity shear wall thickness that adapts to the above changes in multiples of 50 mm. In specific implementation, the length of the limiting steel pipe 42 can be adaptively changed according to the thickness of the first wall panel 1 and the second wall panel 3.

[0057] In this embodiment, the connecting member 4 is divided into a fixed steel rod 41 and a limiting steel pipe 42. During the manufacturing process of the first wall panel 1, only the fixed steel rod 41 needs to be installed on the first wall panel 1, which can reduce the space height occupied by the first wall panel 1. After manufacturing, multiple first wall panels 1 can be stacked together, improving the space utilization effect of the factory building.

[0058] Furthermore, in order to improve the assembly efficiency of the cavity shear wall, on the basis of the above specific implementation, as Figure 3 and Figure 4 shown, the locking part 5 of the above cavity shear wall includes a steel ring 51 and a fastener 52. A number of mounting holes corresponding to the limiting steel pipes 42 are provided on the second wall panel 3, and the steel ring 51 is embedded in the mounting holes;

[0059] One end of the limiting steel pipe 42 away from the first wall panel 1 is provided with a boss 420. An external thread is provided on the outer periphery of the boss 420. The diameter of the boss 420 is smaller than the inner diameter of the steel ring 51, and the diameter of the limiting steel pipe 42 is larger than the inner diameter of the steel ring 51. The boss 420 is connected to the fastener 52.

[0060] Specifically, the limiting steel pipe 42 can be processed by cutting to form a boss 420 with a diameter smaller than the inner diameter of the steel ring 51, and then an external thread is also manufactured on the boss 420 by cutting.

[0061] During the manufacturing process of the second wall panel 3, first, corresponding positioning pins are set on the mold cavity of the template, and then the steel ring 51 is sleeved on the positioning pins. After pouring the UHPC material, the second wall panel 3 is formed. The inner diameter of the steel ring 51 is larger than the outer diameter of the boss 420 and smaller than the diameter of the limiting steel pipe 42. After the second wall panel 3 is aligned with the limiting steel pipes 42 on the first wall panel 1, the boss 420 can pass through the steel ring 51, and then it is fixed by plug welding or threaded connection, which can greatly improve the assembly efficiency of the shear wall.

[0062] In the above setting method, both end faces of the second wall panel 3 can be used as the wall panel installation surface, eliminating the requirement of identifying and flipping the installation surface of the second wall panel 3.

[0063] In the above specific implementation, the head of the fastener 52 is located on the outer end face of the second wall panel 3, that is to say, there is a protruding part on the finishing surface of the second wall panel 3. In this case, it is easy to cause difficulties in later decoration. Therefore, in order to improve the appearance effect of the cavity shear wall and avoid the need for more plastering materials to fill the finishing surface of the second wall panel 3 due to the fastener 52 during the subsequent decoration process, please refer to Figure 5, inside the steel ring 51 of the above-mentioned cavity shear wall, there are a small-diameter hole cavity 511 and a large-diameter hole cavity 512. The diameter of the small-diameter hole is larger than the outer diameter of the boss 420. The small-diameter hole is close to the steel mesh 2. When the fastener 52 and the boss 420 are in a fastening fit, the head of the fastener 52 is placed in the large-diameter hole cavity 512. The small-diameter hole cavity 511 of the steel ring 51 is close to the installation surface, and the large-diameter hole cavity 512 is close to the decoration surface. After using the fastener 52, such as a bolt, for installation and fixation, the head of the bolt is embedded in the large-diameter hole cavity 512, so that the outer decoration surface can maintain the original horizontal plane.

[0064] In practical applications, the weight of the steel mesh 2 reaches hundreds of kilograms. When installing in the form of the steel mesh 2, a large number of workers need to cooperate. In order to improve the installation efficiency and reduce the labor cost at the same time, on the basis of the above specific implementation manner, the steel mesh 2 of the above-mentioned cavity shear wall includes a number of longitudinally distributed steel bars and a number of transversely distributed steel bars that are spaced apart. A number of the longitudinally distributed steel bars are connected to the connecting member 4, and a number of the transversely distributed steel bars are connected to the longitudinally distributed steel bars.

[0065] Furthermore, the above-mentioned cavity shear wall further includes a positioning structure 8 for assisting in installing the longitudinally distributed steel bars. The positioning structure 8 includes a clamp 81 and a fixing ring 82. The fixing ring 82 is connected to the clamp 81. The clamp 81 is sleeved on the connecting member 4, and the longitudinally distributed steel bar is placed in the opening of the fixing ring 82.

[0066] As Figure 6 and Figure 7 shown, the spacing distance between the longitudinally distributed steel bars is equal to the distance between two connecting members 4. During installation, first, the operator determines according to the distance between the steel mesh 2 and the first wall panel 1 or the second wall panel 3. Then, the clamps 81 are respectively fixed on the connecting members 4 at the four corners of the first wall panel 1. The operator manually places two longitudinally distributed steel bars on the first wall panel 1 through the fixing ring 82, and then fixes the longitudinally distributed steel bars by binding or welding. After completing the installation of the above two longitudinally distributed steel bars, the transversely distributed steel bars are welded or bound to the above two longitudinally distributed steel bars, and finally the remaining longitudinally distributed steel bars are installed. In this setting, a single person can complete the installation of the steel mesh 2, effectively reducing the labor cost of the enterprise.

[0067] In order to further improve the connection strength between the concrete and the first wall panel 1 and the second wall panel 3, on the basis of the above specific implementation manner, on the end faces of the first wall panel 1 and the second wall panel 3 of the above-mentioned cavity shear wall facing the steel mesh 2, there are also a number of outwardly extending protrusions 7. The height of the protrusions 7 is equal to the height of the fixed steel rod 41 exposed from the first wall panel 1.

[0068] The present utility model also discloses a shear wall, which comprises the above-mentioned cavity shear wall and concrete located between the first wall panel 1 and the second wall panel 3.

[0069] All the technical effects of the shear wall in the present utility model have been described in detail in the respective specific embodiments of the above-mentioned cavity shear wall, and will not be elaborated herein.

[0070] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference may be made to each other.

[0071] The above has described the various embodiments of the present utility model. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary skill in the art in the technical field to understand the embodiments disclosed herein.

Claims

1. A cavity shear wall, characterized in that, It includes a number of steel bar meshes, as well as a first wall panel and a second wall panel arranged oppositely. A chamber is formed between the first wall panel and the second wall panel. A number of the steel bar meshes are located in the chamber. A number of connecting members are provided on the first wall panel, and the second wall panel is provided with a locking portion that cooperates with the connecting members. The first wall panel and the second wall panel are both provided with a number of concave structures, and the chamber and the concave structures form a mating cavity; Both the first wall panel and the second wall panel are made of UHPC or concrete material.

2. The cavity shear wall according to claim 1, wherein, The concave structure includes a first concave portion and a second concave portion; Along the thickness direction of the cavity shear wall, one end surface of the first wall panel and the second wall panel facing the steel bar mesh is recessed inward to form the first concave portion; Along the width direction of the cavity shear wall, both side surfaces of the first wall panel and the second wall panel are recessed inward to form the second concave portion.

3. The cavity shear wall according to claim 2, wherein The vertical cross-section of the concave structure includes at least one of an arc shape, a rectangle, a cone, and a trapezoid.

4. The cavity shear wall according to claim 1, characterized in that, The connecting member includes a fixed steel rod and a limiting steel pipe. The fixed steel rod is arranged in an L-shaped structure. The first end of the fixed steel rod is buried in the first wall panel, and the second end is exposed from the first wall panel, and the axis of the second end is perpendicular to the plane of the first wall panel; the limiting steel pipe is detachably connected to the fixed steel rod.

5. The cavity shear wall according to claim 4, wherein The locking portion includes a steel ring and a fastener. A number of mounting holes corresponding to the limiting steel pipes are provided on the second wall panel, and the steel ring is embedded in the mounting holes; A boss is provided at one end of the limiting steel pipe away from the first wall panel. An external thread is provided on the outer periphery of the boss. The diameter of the boss is smaller than the inner diameter of the steel ring. The diameter of the limiting steel pipe is larger than the inner diameter of the steel ring. The boss is connected to the fastener.

6. The cavity shear wall according to claim 5, wherein A small-diameter hole cavity and a large-diameter hole cavity are provided inside the steel ring. The diameter of the small-diameter hole cavity is larger than the outer diameter of the boss. The small-diameter hole cavity is close to the steel bar mesh. When the fastener and the boss are in a tight fit, the head of the fastener is accommodated in the large-diameter hole cavity.

7. The cavity shear wall according to claim 6, characterized in that, Both the first wall panel and the second wall panel are also provided with a number of protrusions extending outward on the end surface facing the steel bar mesh. The height of the protrusions is equal to the height of the fixed steel rod exposed from the first wall panel.

8. The cavity shear wall according to claim 1, characterized in that, The steel bar mesh includes a number of longitudinally distributed longitudinal steel bars and a number of transversely distributed transverse steel bars. A number of the longitudinal steel bars are connected to the connecting members, and a number of the transverse steel bars are connected to the longitudinal steel bars.

9. The cavity shear wall according to claim 8, wherein, It also includes a positioning structure for assisting in installing the longitudinal steel bars. The positioning structure includes a clamp and a fixing ring. The fixing ring is connected to the clamp. The clamp is sleeved on the connecting member, and the longitudinal steel bar is accommodated in the opening of the fixing ring.

10. A shear wall, characterized in that, It includes the cavity shear wall according to any one of claims 1 to 9 and the concrete located inside the cavity shear wall.

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