CN218466793U - A prefabricated shear wall - Google Patents

Abstract

The utility model relates to the field of assembly type buildings, and discloses a prefabricated assembly type shear wall, which comprises an upper layer of distribution steel bars, a lower layer of distribution steel bars, a template and a plurality of positioning connecting pieces, wherein the upper layer of distribution steel bars and the lower layer of distribution steel bars are connected through tie bars and/or truss steel bars to form a steel bar cage; the positioning connecting piece comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the web plate, the two flange plates are both positioned outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting fastening bolts; the inner surface of the template is tightly attached to the outer surface of the flange plate, and a plurality of fastening bolts penetrate through the through holes of the template to be connected with the flange plate so as to form a cavity for pouring post-cast concrete; the tensile strength of the web plate is greater than the maximum lateral pressure of the post-cast concrete to the template, and the maximum bending deformation of the flange plate is less than 1mm. Therefore, the connection between the reinforcement cage and the template can be completed in a factory, the construction quality is improved, and the construction process is simplified.

Description

A prefabricated shear wall

technical field

The utility model relates to the technical field of assembled buildings, in particular to a prefabricated assembled shear wall.

Background technique

The existing cast-in-place shear wall structure has complex construction technology and long construction period, and the problems of steel bar deviation, wrong binding and missed binding are easy to occur when the steel bar binding work is carried out on site, and it is difficult to guarantee the binding quality of the steel cage. At the same time, steel bars are directly exposed to the external environment and are easily affected by weather factors such as rain and snow, which can easily slow down the construction progress.

To sum up, how to improve the construction quality of the shear wall structure and simplify the construction process of the shear wall structure is an urgent problem to be solved by those skilled in the art.

Utility model content

In view of this, the purpose of this utility model is to provide a prefabricated assembled shear wall, which can be prefabricated in the factory to complete the binding of the reinforcement cage and fix the reinforcement cage and the formwork on both sides, which improves the construction quality of the shear wall structure. And the construction process of the shear wall structure is simplified.

In order to achieve the above object, the utility model provides the following technical solutions:

A prefabricated assembly type shear wall, including upper distribution reinforcement, lower distribution reinforcement, formwork and several I-shaped positioning connectors, the upper distribution reinforcement and the lower distribution reinforcement are connected by tie bars and/or trusses The reinforcement is connected to form a reinforcement cage;

The positioning connector includes a web and flange plates vertically connected to both ends of the web, the web runs through the reinforcement cage, and the web is provided with horizontal reinforcement holes so that part of the reinforcement cage Horizontal steel bars are installed in the horizontal steel bar holes, the two flange plates are located outside the reinforcement cage, and the flange plates are provided with several threaded holes for installing fastening bolts;

The inner surface of the template is set close to the outer surface of the flange plate, and several fastening bolts pass through the through holes of the template to connect with the flange plate to tie the two positioning connectors together. The formwork on the side surrounds a cavity for pouring concrete after pouring;

The tensile strength of the web is greater than the maximum lateral pressure of the post-cast concrete on the template, and the maximum bending deformation of the flange plate is less than 1 mm when the post-cast concrete is poured.

Preferably, the shape and size of the two flange plates are the same, and the central axis of the web is collinear with the central axis of the flange plate;

The threaded holes are evenly distributed along the circumferential direction of the flange plate.

Preferably, the formwork includes wood formwork, stainless steel formwork, aluminum alloy formwork, ribbed plastic formwork, PVC crust foam board and fiber reinforced composite board, and the inner diameter of the through hole of the formwork is greater than or equal to the fastening bolt the outer diameter.

Preferably, when the horizontal width of the cavity is greater than or equal to 200mm, the post-cast concrete is ordinary concrete;

When the horizontal width of the cavity is less than 200mm, the post-cast concrete is self-compacting concrete or fine stone concrete.

Preferably, the formwork is provided with pipe openings and/or door and window openings for placing opening moulds.

Preferably, it also includes a thermal insulation layer, the thermal insulation layer is arranged between the template and the upper distributed steel bars, and there is a gap between the thermal insulation layer, the template, and the upper distributed steel bars, so that the upper layer Both the distributed steel bars and the insulation layer can be completely wrapped in the post-cast concrete.

Preferably, the web of the positioning connector is arranged at the crossing point of the steel bars of the reinforcement cage, and the positioning connector is bound or welded to the reinforcement cage.

The prefabricated assembly type shear wall provided by the utility model is prefabricated in the factory, using tie bars and/or truss steel bars to connect the upper layer distribution steel bars and the lower layer distribution steel bars to form a steel bar cage; in the steel bar cage, a plurality of positioning points penetrating the bar bar cage are arranged. Connectors, so that the flange plates at both ends of the positioning connector protrude out of the reinforcement cage, and connect the web plate and the reinforcement cage of the positioning connector; set a template on the outer end surface of the flange plate, and use fastening bolts to connect the template and the positioning connector , to complete the connection of prefabricated wall panels.

After the prefabricated wall panels are transported and hoisted to the construction site, post-cast concrete is poured in the cavity between the formwork on both sides; after the post-cast concrete reaches the predetermined strength, the fastening bolts and the formwork on both sides are removed, and the flange The threaded holes on the plate are filled with grout.

Therefore, in the prefabricated assembly shear wall provided by the utility model, the binding of the reinforcement cage is prefabricated in the factory, which not only ensures the binding quality of the reinforcement cage, but also saves the construction process of binding the reinforcement cage on site, greatly simplifying the The construction process of the shear wall structure is specified; and the web of the positioning connector is provided with a horizontal reinforcement hole for the horizontal reinforcement of the reinforcement cage to pass through, and the reinforcement cage is connected with the positioning connector of the formwork on both sides of the tie, avoiding the reinforcement cage Misalignment occurs during transportation and hoisting.

At the same time, using the positioning connectors to tie the reinforcement cage and the formwork on both sides, on the one hand, it is beneficial to reduce the quality of the prefabricated wall and facilitate the hoisting and transportation of the prefabricated wall; Construction process of shear wall structure.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of the specific embodiment one of the prefabricated assembly type shear wall provided by the utility model;

Fig. 2 is the structural schematic diagram of the specific embodiment 2 of the prefabricated assembly type shear wall provided by the utility model;

Fig. 3 is the structural representation of the specific embodiment three of the prefabricated assembly type shear wall provided by the utility model;

Fig. 4 is the structural representation of the specific embodiment 4 of the prefabricated assembly type shear wall provided by the utility model;

Fig. 5 is the structural representation of the specific embodiment five of the prefabricated assembly type shear wall provided by the utility model;

Fig. 6 is a schematic diagram of the distribution of tie bars and positioning connectors in the prefabricated assembled shear wall provided by the present invention;

Fig. 7 is a structural schematic diagram of a positioning connector;

Figure 8 is a schematic diagram of the assembly of the prefabricated wall and L-shaped edge components of the prefabricated shear wall provided by the present invention;

Fig. 9 is a schematic front view of the reinforcement cage of the L-shaped edge member in Fig. 8;

Fig. 10 is a schematic diagram of the assembly of the prefabricated wall and the L-shaped edge member of the prefabricated shear wall provided by the present invention connected by another assembly method;

Figure 11 is a schematic diagram of the assembly of the prefabricated wall and the in-line edge components of the prefabricated assembly shear wall provided by the utility model;

Figure 12 is a schematic diagram of the assembly of the prefabricated wall and the T-shaped edge construction of the prefabricated assembly shear wall provided by the present invention;

Fig. 13 is a schematic front view of the reinforcement cage of the T-shaped edge member in Fig. 12 .

In Figure 1-Figure 13:

11 is the positioning connector, 12 is the fastening bolt, 13 is the backing plate, 2 is the upper distribution reinforcement, 3 is the lower distribution reinforcement, 4 is the tie bar, 5 is the truss reinforcement, 6 is the template, 7 is the cavity, 8 9 is an antirust gasket, 10 is an edge member, 101 is a longitudinal bar, 102 is a stirrup, and 103 is a horizontal connecting steel bar.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The core of the utility model is to provide a prefabricated assembled shear wall, which can be prefabricated in the factory to complete the binding of the steel cage and fix the steel cage and the formwork on both sides, which improves the construction quality of the shear wall structure and simplifies the shearing process. The construction process of force wall structure.

Please refer to Figure 1-Figure 13.

The prefabricated assembled shear wall provided by the utility model includes the upper distributed steel bars 2, the lower distributed steel bars 3, the template 6 and several I-shaped positioning connectors 11, the upper distributed reinforced bars 2 and the lower distributed reinforced bars 3 are tied The reinforcement 4 and/or the truss reinforcement 5 are connected to form a reinforcement cage;

The positioning connector 11 includes a web and flange plates vertically connected to both ends of the web, the web runs through the reinforcement cage, and the web is provided with a horizontal reinforcement cage, so that part of the horizontal reinforcement of the reinforcement cage is placed in the horizontal reinforcement hole, Both flange plates are located outside the reinforcement cage, and the flange plates are provided with several threaded holes for installing fastening bolts 12;

The inner surface of the formwork 6 is arranged close to the outer surface of the flange plate, and several fastening bolts 12 are connected with the flange plate through the through holes of the formwork 6, and the formwork 6 on both sides of the connecting piece 11 is bounded by a tie. Concrete cavity 7 after pouring;

The tensile strength of the web is greater than the maximum lateral pressure of the post-cast concrete on the formwork 6, and the maximum bending deformation of the flange plate is less than 1 mm when the post-cast concrete is poured.

Please refer to Fig. 7, the positioning connector 11 includes a web and flange plates perpendicular to both sides of the web, so the positioning connector 11 is I-shaped; Threaded holes, so that the flange plate cooperates with the fastening bolt 12, and the formwork 6 is compressed between the flange plate and the bolt head of the fastening bolt 12.

During on-site pouring, the impact force of the post-cast concrete on the formwork 6 can be transmitted from the formwork 6 to the fastening bolts 12, and then transmitted to the web through the flange plate threaded with the fastening bolts 12. During this process, the flange plate bears extreme Large bending moment and shear force, the web bears a large tensile force.

Therefore, the flange plate must have sufficient flexural bearing capacity, shear bearing capacity and bending stiffness, and under the impact force of post-cast concrete, the bending deformation of the flange plate should be less than 1 mm; the tensile strength of the web should be It is greater than the maximum lateral pressure of the post-cast concrete on the formwork 6.

Restricted by the thickness of the flange plate, the length of the threaded hole on the flange plate is relatively short. In order to ensure the connection strength and force transmission relationship between the flange plate and the fastening bolt 12, 2- 4 threaded holes.

The geometric shapes of the flange plate and the web plate are not limited, the flange plate can be set in shapes such as circular, rectangular and triangular, and the web plate can be set as a rectangular plate, so that the positioning connector 11 can be processed and manufactured by cutting the I-beam. The processing method is convenient in production, low in cost and reliable in performance. Of course, the web can also be set as a rod-shaped structure such as a prism, a cylinder, and a circular platform; the size of the flange plates on both sides can be the same or different.

In order to make the stress of each direction of the flange plate and the web relatively uniform, and to facilitate the production of the positioning connector 11, preferably, the shape and size of the two flange plates can be set to be the same, and the central axis of the web is the same as that of the flange plate. The central axis of the flange is collinear; the threaded holes are evenly distributed along the circumferential direction of the flange plate.

Considering that individual parts of the positioning connector 11 are directly exposed to the post-cast concrete, in order to reduce corrosion and prolong its service life, high-strength corrosion-resistant materials such as stainless steel, titanium alloy, high-strength plastic and Hastelloy are often used to make the positioning connector 11 .

Of course, the positioning connector 11 can also be set to ordinary steel, and the anti-rust gasket 9 is set on the outer end face of the flange plate of the positioning connector 11. The thickness of the anti-rust gasket 9 is mostly 5-40mm, made of cement mortar , fiber composite materials and other inorganic non-metallic materials, with good corrosion resistance.

The web plate of the positioning connector 11 is set through the width direction of the reinforcement cage, and the flange plate protruding outside the reinforcement cage is in contact with the inner surface of the formwork 6. In order to ensure the thickness of the concrete protective layer of the upper and lower distribution reinforcement, it should be reasonably designed The length that the flange plate protrudes from the reinforcement cage.

When the length of the positioning connector 11 is insufficient, the thickness of the concrete protective layer of the reinforcement cage can be increased by increasing the thickness of the antirust gasket 9 .

The positioning connector 11 can be cut and processed by I-beam, or welded by the web and the flange plates at both ends, or it can be mass-produced in an integrated manner by casting, turning, etc., wherein the thickness of the flange plate is much Set to 3-20mm. The specific production method of the positioning connector 11 is determined according to factors such as the material and shape of the positioning connector 11 , and will not be repeated here.

The fastening bolts 12 mostly use hexagonal head bolts, which are used to crimp the formwork 6 to the outer end surface of the flange plate of the positioning connector 11, and block the through holes of the formwork 6 to prevent the post-cast concrete from the through holes of the formwork 6. overflow.

When the bolt head size of fastening bolt 12 was less than the size of the through hole of template 6, backing plate 13 can be provided between fastening bolt 12 and template 6, and the size of backing plate 13 is greater than the size of the through hole of template 6, And the backing plate 13 is provided with through holes for installing the fastening bolts 12 .

The backing plate 13 is usually made of any material with a certain bending strength such as steel, plastic and alloy, and the backing plate 13 can be set to any geometric shape such as a circle or a rectangle; in order to save materials, the through holes of the backing plate 13 are mostly arranged the center of the plate 13.

The specific types, materials, shapes and sizes of the positioning connector 11, the fastening bolt 12 and the backing plate 13 are determined according to the design strength requirements of the actual construction, and will not be repeated here.

The upper-layer distribution reinforcement 2 and the lower-layer distribution reinforcement 3 are connected by tie bars 4 and/or truss reinforcement 5 to form the reinforcement skeleton of the assembled shear wall; The steel mesh composed of horizontal steel bars and multiple vertical steel bars, as shown in Figure 6, can also be set as a formed steel mesh sheet. The specific material, type and size of the upper and lower distributed steel bars are determined according to the design strength requirements of the actual construction. I won't repeat them here.

Preferably, please refer to FIG. 1 , the upper distributed steel bars 2 and the lower distributed steel bars 3 are bound or welded to the tie bars 4 , and the tie bars 4 are evenly arranged in a plum blossom shape at the intersection of the reinforcement cages. The crossing point of reinforcement is the connection point of horizontal reinforcement and vertical reinforcement in the reinforcement cage, where the tie bars 4 are arranged, which is conducive to enhancing the connection stability between the tie bars 4 and the upper and lower distributed reinforcement.

The truss reinforcement 5 can be used to partially or completely replace the tie bars 4, as shown in Figure 2 and Figure 5, the truss reinforcement 5 includes at least one upper reinforcement and at least two lower reinforcements; The stranded wires are welded and connected successively to form an N-shaped structure or an M-shaped structure; the upper layer of steel bars is bound or welded to the upper layer of distributed steel bars 2, and the lower layer of steel bars is bound or welded to the lower layer of distributed steel bars 3.

In order to effectively tie the upper distributed steel bars 2 and the lower distributed steel bars 3, preferably, the tie bars 4 and/or the truss steel bars 5 can be uniformly arranged along the length direction of the prefabricated shear wall. Preferably, the distance between two adjacent tie bars 4 can be set at 200-800mm.

In order to prevent the reinforcement cage from shifting during transportation and hoisting, the web of the positioning connector 11 is connected to the reinforcement cage. Preferably, the web of the positioning connector 11 can be set to be positioned at the reinforcing bar intersection of the reinforcement cage, the positioning connector 11 is bound or welded with the reinforcement cage, and the web of the positioning connector 11 can be connected with the horizontal reinforcement and the vertical reinforcement of the reinforcement cage at the same time. Connections with straight bars are more stable and reliable than connections with only horizontal bars or only vertical bars.

The inner surface of the template 6 is arranged close to the outer surface of the upper flange plate of the positioning connector 11 to enclose a cavity 7 for pouring concrete.

Preferably, the formwork 6 includes wood formwork, stainless steel formwork, plastic formwork, aluminum alloy formwork, PVC crust foam board, ribbed plastic formwork and fiber-reinforced composite board, and the inner diameter of the through hole of the formwork 6 is greater than or equal to the fastening bolt 12 the outer diameter. In order to facilitate the disassembly of the fastening bolts 12 , the through hole of the template 6 is generally set to be slightly larger than the outer diameter of the fastening bolts 12 .

The specific type of formwork 6 is determined according to actual construction needs with reference to the prior art; the thickness of formwork 6 is determined according to the material of formwork 6, the thickness of formwork 6 with relatively high strength is relatively low, and the thickness of formwork 6 with relatively low strength is relatively high .

In addition to the above-mentioned through holes for installing fastening bolts 12, there are also reserved pipeline openings or door and window openings for placing hole molds on the template 6, in order to prepare for laying pipelines or opening doors and windows in the prefabricated shear wall.

Taking the laying of pipelines as an example, it is necessary to reserve pipelines in the reinforcement cage according to the design position, insert several positioning connectors 11 in the non-pipeline area of the reinforcement cage, and install holes outside the flange plates of the positioning connectors 11 The template 6 of the mold is aligned and connected to the hole mold and the pipeline, and the fastening bolt 12 is used to connect the template 6 and the flange plate of the positioning connector 11 to complete the assembly of the prefabricated wall; after the prefabricated wall is transported and hoisted in place, Post-cast concrete is poured in the cavity 7, and the hole mold and template 6 are removed after the post-cast concrete reaches a preset strength for subsequent repeated use.

The type and thickness of the post-cast concrete will affect the strength of the prefabricated shear wall. Considering the design strength and construction cost of the wall, ordinary concrete is usually poured when the horizontal width of the cavity 7 is greater than or equal to 200mm, and the cavity 7 When the horizontal width is less than 200mm, pour self-compacting concrete or fine stone concrete.

During factory prefabrication, use tie bars 4 and/or truss bars 5 to connect the upper distribution reinforcement 2 and the lower distribution reinforcement 3 to form a reinforcement cage; a plurality of positioning connectors 11 penetrating the reinforcement cage are arranged in the reinforcement cage to make the positioning connection The flange plates at both ends of the member 11 protrude out of the reinforcement cage, and connect the web plate and the reinforcement cage of the positioning connector 11; the template 6 is set on the outer end surface of the flange plate, and the template 6 and the positioning connector 11 are connected by fastening bolts 12 Flange panels to complete the connection of prefabricated wall panels.

After the prefabricated wall panels are transported and hoisted to the construction site, post-cast concrete is poured in the cavity 7 between the formwork 6 on both sides; after the post-cast concrete reaches the predetermined strength, the fastening bolts 12 and the formwork 6 on both sides are removed, And fill the threaded hole on the flange plate.

It should be noted that, please refer to Fig. 8, Fig. 10-Fig. 12, the edge member 10 includes various types such as a straight edge member, an L-shaped edge member, and a T-shaped edge member, and the reinforcement cage of the edge member 10 can be made of The longitudinal bars 101, stirrup bars 102 (and tie bars 4) are connected and formed by binding, mechanical connection, sleeve grouting connection and welding. The connection method between the edge member 10 and the prefabricated wall is affected by the type of the edge member 10 and the binding method of the reinforcement cage of the edge member 10 .

For example, when the reinforcement cage of the edge member 10 is bound and connected, the reinforcement cage of the edge member 10, the formwork 6 of the edge member 10 and the prefabricated wall can be arranged as an integral structure, and the edge member 10 and the prefabricated wall are prefabricated and transported and hoisted together , as shown in Figure 10-12;

When the edge member 10 is a non-inline edge member or the reinforcement cage of the edge member 10 is not bound and connected, since the edge member 10 is inconvenient to be prefabricated and transported together with the prefabricated wall at this time, the reinforcement cage of the edge member 10 can be independent in the factory Prefabrication can also be made on site; after the reinforcement cage of the edge member 10 is completed and the hoisting of the prefabricated wall is completed, several horizontal connecting reinforcement bars 103 are evenly arranged between the two, as shown in FIG. 8 .

Preferably, after the reinforcement cage of the edge member 10 is manufactured and the hoisting of the prefabricated wall is completed, there is a gap between the reinforcement cage of the edge member 10 and the connecting end of the prefabricated wall, so as to prevent the connection end of the prefabricated wall from being connected to the edge member 10 during hoisting. The steel cage collides, and facilitates the fine-tuning of the position of the prefabricated wall, improving the error tolerance rate of hoisting.

In the same way, when the prefabricated wall has two layers or even multiple layers, connecting section steel or steel plate can be arranged in the cavities 7 of the adjacent upper and lower prefabricated walls, and the surface of the connecting section steel and the surface of the steel plate are provided with Several studs are used to enhance the shear bearing capacity of the connection interface and simplify the construction process.

In order to ensure the pouring quality of the post-cast concrete, when there are many layers of the prefabricated wall, the cavity 7 of the prefabricated wall needs to be poured layer by layer. Preferably, high-strength ductile concrete with good fluidity can be poured into the bottom prefabricated wall to enhance the overall compressive, bending and shearing bearing capacity.

In this embodiment, the binding of the reinforcement cage is prefabricated in the factory, which not only ensures the binding quality of the reinforcement cage, but also saves the construction process of binding the reinforcement cage on site, which greatly simplifies the construction process of the shear wall structure; and the positioning The web of the connector 11 is provided with a horizontal reinforcement hole through which the horizontal reinforcement of the reinforcement cage passes, and the reinforcement cage is connected with the positioning connector 11 of the formwork 6 on both sides of the tie, which avoids the deviation of the reinforcement cage during transportation and hoisting.

At the same time, using the positioning connector 11 to tie the reinforcement cage and the formwork 6 on both sides, on the one hand, it is beneficial to reduce the quality of the prefabricated wall and facilitate the hoisting and transportation of the prefabricated wall. The construction procedure of the shear wall structure is simplified.

On the basis of the above embodiments, the prefabricated shear wall also includes an insulation layer 8, the insulation layer 8 is arranged between the formwork 6 and the upper distribution steel bars 2, and there are gap, so that the upper distribution steel bars 2 and the insulation layer 8 can be completely wrapped in the post-cast concrete.

The specific type and thickness of the insulation layer 8 are determined according to the building insulation regulations in each region with reference to the prior art. The distance from the insulation layer 8 to the inner surface of the formwork 6, and the distance from the insulation layer 8 to the outer surface of the upper distributed steel bars 2 are based on the actual construction. The design thickness of the reinforced cage concrete cover is determined, and will not be repeated here.

In this embodiment, there is a gap between the insulation layer 8 and the formwork 6 and the upper distribution steel bars 2, which is beneficial to wrap the upper distribution reinforcement bars 2 and the insulation layer 8 in the post-cast concrete. On the one hand, it strengthens the relationship between the upper distribution reinforcement bars 2 and The synergistic force of the post-cast concrete, on the other hand, is provided with a post-cast concrete layer outside the insulation layer 8, and the post-cast concrete layer can play a role of anticorrosion and fire prevention for the insulation layer 8.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The prefabricated assembly type shear wall provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (7)

1. A prefabricated assembly type shear wall is characterized by comprising upper-layer distributed steel bars, lower-layer distributed steel bars, a template and a plurality of I-shaped positioning connecting pieces, wherein the upper-layer distributed steel bars and the lower-layer distributed steel bars are connected through tie bars and/or truss steel bars to form a steel bar cage;

the positioning connecting piece comprises a web plate and flange plates vertically connected to two ends of the web plate, the web plate penetrates through the steel reinforcement cage, the web plate is provided with horizontal steel reinforcement holes, so that part of horizontal steel reinforcements of the steel reinforcement cage penetrate through the horizontal steel reinforcement holes, the two flange plates are positioned outside the steel reinforcement cage, and the flange plates are provided with a plurality of threaded holes for mounting fastening bolts;

the inner surface of the template is arranged to be tightly attached to the outer surface of the flange plate, and a plurality of fastening bolts penetrate through holes of the template to be connected with the flange plate so as to tie the templates on two sides of the positioning connecting piece and enclose a cavity for pouring post-cast concrete;

the tensile strength of the web plate is greater than the maximum side pressure of the post-cast concrete to the template, and the maximum bending deformation of the flange plate during the post-cast concrete pouring is less than 1mm.

2. The prefabricated shear wall of claim 1, wherein the two flange plates are identical in shape and size, and the central axis of the web is collinear with the central axis of the flange plates;

the threaded holes are uniformly distributed along the circumferential direction of the flange plate.

3. The prefabricated shear wall of claim 1, wherein the form panels comprise wood form panels, stainless steel form panels, aluminum alloy form panels, PVC skinning foam boards, ribbed plastic form panels, and fiber reinforced composite boards, and wherein the inside diameter of the through holes of the form panels is greater than or equal to the outside diameter of the fastening bolts.

4. The prefabricated shear wall of any one of claims 1 to 3,

when the horizontal width of the cavity is larger than or equal to 200mm, the post-cast concrete is ordinary concrete;

and when the horizontal width of the cavity is less than 200mm, the post-cast concrete is self-compacting concrete or fine aggregate concrete.

5. The prefabricated shear wall of any one of claims 1 to 3, wherein the formwork is provided with pipe openings and/or door and window openings for placing opening molds.

6. The prefabricated shear wall of any one of claims 1 to 3, further comprising an insulating layer, wherein the insulating layer is arranged between the formwork and the upper distribution steel bars, and gaps are formed between the insulating layer and the formwork and between the insulating layer and the upper distribution steel bars, so that the upper distribution steel bars and the insulating layer can be completely wrapped in the post-cast concrete.

7. The prefabricated shear wall of any one of claims 1 to 3, wherein the web of the positioning connector is disposed at a reinforcement intersection of the reinforcement cage, and the positioning connector is bound or welded to the reinforcement cage.

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