A reinforced concrete composite shear wall connected by Z-shaped folded plates and preparation method thereof

Abstract

The present invention discloses a reinforced concrete composite shear wall connected by Z-shaped folded plates and a preparation method thereof, comprising two prefabricated single plates placed vertically in parallel and connected to each other; the prefabricated single plates comprise a prefabricated bottom plate, a Z-shaped folded plate is arranged inside the prefabricated bottom plate; the end of the Z-shaped folded plate is located outside the prefabricated bottom plate. The preparation method comprises the following steps: the first step is to prepare two prefabricated single plates respectively; the second step is to hoist the two prefabricated single plates to a designated position and weld them to obtain a shear wall. The present invention has the characteristics of being easy to manufacture, being able to reduce production costs and improving the overall force-bearing performance of the shear wall.

Description

Technical Field

[0001] The invention relates to a concrete composite shear wall, in particular to a reinforced concrete composite shear wall connected by Z-shaped folded plates and a preparation method thereof. Background Art

[0002] In response to the industrialization of construction, more and more building components are prefabricated in factories, such as composite floor slabs and composite shear walls. When making existing composite shear walls, it is necessary to first cast and form the first prefabricated single board, and pre-embed the truss steel bars in the first single board. When casting the second prefabricated single board, the truss steel bars pre-embedded in the first single board are pressed into the designated position, and then put into the curing room for curing together. The process is complicated and takes a long time. At the same time, in the existing composite shear walls, the truss steel bars in the first prefabricated single board and the steel mesh in the second single board cannot be effectively connected, which is not only not conducive to the overall force of the shear wall, but also easy to expand the mold when pouring the embedded concrete, affecting the construction quality of the shear wall; the second shear wall single board cannot form an effective rough surface, resulting in weak bonding performance between it and the cast-in-place concrete slab. At the same time, since the precast concrete slab is composed of truss steel bars, internal steel bars and concrete layers, the amount of steel used in the truss steel bars is very large, resulting in a high overall engineering cost, which is not conducive to the promotion of building industrialization; at the same time, the production of truss steel bars is complicated, the web bars need to be pre-bent and then welded with the chord bars, and special equipment is required for processing and production, which is troublesome to operate. Therefore, the existing technology has the problems of manufacturing trouble, high cost and general overall force performance of the shear wall. Summary of the invention

[0003] The purpose of the present invention is to provide a reinforced concrete composite shear wall connected by Z-shaped folded plates and a preparation method thereof. The present invention has the characteristics of convenient manufacturing, capable of reducing production costs and improving the overall bearing performance of the shear wall.

[0004] The technical solution of the present invention is as follows: a reinforced concrete composite shear wall connected by a Z-shaped folded plate, comprising two prefabricated single plates placed vertically and parallel to each other, and the two prefabricated single plates are connected to each other; the prefabricated single plates include a prefabricated bottom plate, and a Z-shaped folded plate is arranged inside the prefabricated bottom plate; the end of the Z-shaped folded plate is located on the outside of the prefabricated bottom plate; the two prefabricated single plates are connected via the Z-shaped folded plate.

[0005] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, a shear wall insulation layer and an outer prefabricated plate are arranged on the outer side of one prefabricated single plate in sequence, and the outer prefabricated plate and the prefabricated single plate on the same side are connected by bolts.

[0006] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, the precast base plate includes a precast concrete layer, a precast base plate internal steel bar layer is arranged in the precast concrete layer, and the Z-shaped folded plates and the precast base plate internal steel bar layer are connected by welding.

[0007] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, the Z-shaped folded plates include vertical plates, a group of vertical connecting plates are provided on the top of the vertical plates, grooves are provided between adjacent vertical connecting plates, horizontal mounting plates are respectively provided on both sides of the bottom of the vertical plates, and the horizontal mounting plates on both sides are alternately distributed with each other.

[0008] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, the vertical connecting plates are also provided with lifting holes.

[0009] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, the cross-section of the horizontal mounting plate is a rectangular structure.

[0010] In the aforementioned reinforced concrete composite shear wall connected by Z-shaped folded plates, the cross-section of the horizontal mounting plate is an isosceles trapezoidal structure.

[0011] A method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates comprises the following steps:

[0012] The first step is to prepare two prefabricated veneers and place them in a curing room for curing;

[0013] The second step is to hoist the two prefabricated single panels to the designated location, and weld the intersection of the folded plates on the two prefabricated single panels to obtain a shear wall.

[0014] In the aforementioned method for preparing a reinforced concrete composite shear wall connected by a Z-shaped folded plate, the specific preparation method of the prefabricated single plate is:

[0015] 1) Cut and bend the steel plate to form a folded plate;

[0016] 2) Weld the folded plate and the inner steel bar layer of the prefabricated bottom plate to form a frame;

[0017] 3) Place the frame into a mold and pour concrete to obtain a prefabricated single panel.

[0018] In the aforementioned method for preparing a reinforced concrete composite shear wall connected by a Z-shaped folded plate, in the second step, it is also necessary to adhere the insulation layer to the inner side of the outer prefabricated plate, and then connect the outer prefabricated plate and one of the prefabricated single plates together by bolts.

[0019] Compared with the prior art, the present invention connects two prefabricated single plates of a Z-shaped folded plate structure together by welding and other means to form a composite shear wall. The two prefabricated plates can be manufactured and maintained independently, and the whole process is easy to operate and the flow is simple. The steel bars in the two prefabricated single plates can also be effectively connected together to improve the overall stress-bearing performance of the shear wall. In addition, the mold is not easy to expand during the later pouring of concrete, which can effectively improve the overall quality of the shear wall product. At the same time, the surface of the prefabricated single plate can also form an effective rough surface, which is convenient for the bonding of new and old concrete.

[0020] The prefabricated single plate is composed of a prefabricated bottom plate and a Z-shaped folded plate embedded in the prefabricated bottom plate, which replaces the traditional truss steel bar structure, thereby effectively reducing the amount of steel used and reducing the manufacturing cost; after the Z-shaped folded plate is embedded in the prefabricated bottom plate, it is welded to the steel bar layer inside the prefabricated bottom plate, which is not only convenient for operation and manufacturing, but also enhances the overall rigidity of the prefabricated plate, so that the prefabricated bottom plate will not crack during transportation and hoisting; at the same time, part of the vertical connecting plate on the Z-shaped folded plate is inside the prefabricated bottom plate, and part is outside the prefabricated bottom plate, which is used to mix with cast-in-place concrete, which can effectively enhance the shear bearing capacity of the superimposed surface;

[0021] According to the actual construction requirements, the Z-shaped folded plate can be arranged in a dispersed or localized manner. It can be arranged densely in places with large bending moments and shear forces. It can be flexibly adjusted according to needs, which can ensure strength and minimize costs. The vertical connecting plate of the Z-shaped folded plate has a lifting hole, which does not require pre-embedded lifting rings, reduces the process and further saves the cost.

[0022] In summary, the present invention has the characteristics of being easy to manufacture, being able to reduce production costs and improving the overall bearing performance of the shear wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is the structural view of sandwich insulation concrete composite shear wall;

[0025] Figure 3 It is a three-dimensional structural view of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of a prefabricated single panel;

[0027] Figure 5 is a cross-sectional view of a prefabricated veneer;

[0028] Figure 6 It is a structural view of the folding plate in Example 1;

[0029] Figure 7This is an installation view of the folded plate and the inner steel reinforcement layer of the prefabricated bottom plate in Example 1;

[0030] Figure 8 It is a cutting and bending diagram of the Z-shaped folding plate in Example 1;

[0031] Fig. 9 This is a structural view of another type of folding plate in Example 1;

[0032] Fig.10 This is another installation view of the folded plate and the inner steel reinforcement layer of the prefabricated bottom plate in Example 1;

[0033] Fig.11 It is a cutting and bending diagram of another type of folding plate in Example 1;

[0034] Fig.12 It is a structural view of the folding plate in Example 2;

[0035] Fig.13 This is an installation view of the folded plate and the inner steel reinforcement layer of the prefabricated bottom plate in Example 2;

[0036] Fig.14 This is the cutting and bending diagram of the Z-shaped folding plate in Example 2.

[0037] The markings in the accompanying drawings are: 1-prefabricated single board, 3-shaped folded plate, 4-shear wall insulation layer, 5-external prefabricated board, 6-bolts, 7-prefabricated bottom plate, 701-prefabricated concrete layer, 702-inner steel bar layer of prefabricated bottom plate, 301-vertical plate, 302-vertical connecting plate, 303-horizontal mounting plate, 304-groove. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0039] Embodiment 1. A reinforced concrete composite shear wall connected by folded plates, comprising: Figures 1 to 11 As shown, it includes two prefabricated single panels 1 placed vertically and parallelly, and the two prefabricated single panels 1 are connected to each other; the prefabricated single panels 1 include a prefabricated bottom panel 7, and a folding plate 3 is provided inside the prefabricated bottom panel 7; the end of the folding plate 3 is located on the outside of the prefabricated bottom panel 7; the two prefabricated single panels 1 are connected via the folding plate 3.

[0040] The final shear wall product that is able to bear the load also includes a concrete layer located between the two prefabricated slabs.

[0041] The outer side of one of the prefabricated single panels 1 (located on the outer side of the wall during installation) is provided with a shear wall insulation layer 4 and an outer prefabricated panel 5 in sequence, and the outer prefabricated panel 5 is connected to the prefabricated single panel 1 on the same side via bolts 6.

[0042] The precast bottom plate 7 comprises a precast concrete layer 701, in which a precast bottom plate internal steel bar layer 702 is arranged, and the folded plate 3 is connected to the precast bottom plate internal steel bar layer 702 by welding.

[0043] The steel bar protection layer of the prefabricated base plate is generally controlled by placing a fixed thickness concrete pad under the steel bar. However, the area of ​​the steel bar is relatively small. Under the concentrated load of construction, the concrete pad is often crushed, resulting in insufficient steel bar protection layer. However, the prefabricated base plate using Z-shaped folded plates has a large bottom area, and the concrete pad is evenly stressed and not easily crushed, which is conducive to the quality control of the thickness of the steel bar protection layer.

[0044] The folding plate 3 includes a vertical plate 301, a group of vertical connecting plates 302 are provided on the top of the vertical plate 301, grooves 304 are provided between adjacent vertical connecting plates 302, and horizontal mounting plates 303 are respectively provided on both sides of the bottom of the vertical plate 301, and the horizontal mounting plates 303 on both sides are alternately distributed with each other.

[0045] A trapezoidal groove (groove) is provided between two adjacent vertical connecting plates; the horizontal mounting plate on one side of the vertical plate corresponds to the trapezoidal groove, and the horizontal mounting plate on the other side of the vertical plate corresponds to the position of the vertical connecting plate. Figure 6 The cutting and bending diagram is shown in Figure 8 As shown, by using this cutting method, the effective utilization rate of steel is 94.3%. The thick solid line in the figure is the cutting line, and the thin dotted line is the bending line.

[0046] Alternatively, the horizontal mounting plates on both sides of the vertical plate may also correspond to the adjacent vertical connecting plates, such as Fig. 9 The cutting and bending diagram is shown in Fig.11 As shown in the figure, the thick solid line is the cutting line and the thin dotted line is the bending line. The amount of steel used can be further reduced.

[0047] The vertical connecting plate 302 is also provided with a lifting hole.

[0048] The cross section of the horizontal mounting plate 303 is a rectangular structure.

[0049] A method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates comprises the following steps:

[0050] The first step is to prepare two prefabricated veneers respectively and put them into a curing room for curing;

[0051] The second step is to hoist the two prefabricated single panels to the designated location, and weld the intersection of the folded plates on the two prefabricated single panels to obtain a shear wall.

[0052] As a finished shear wall product that can finally bear the load, it is necessary to pour concrete between the two prefabricated panels to form a concrete layer. After curing, a finished shear wall product that can bear the load can be obtained.

[0053] The specific preparation method of the prefabricated single board is as follows: the internal steel bar layer of the prefabricated bottom plate is bundled, the horizontal mounting plate at the bottom of the Z-shaped folded plate is connected to the internal steel bar layer of the prefabricated bottom plate (by welding), and then placed together in a mold, a concrete pad is placed at the bottom of the Z-shaped folded plate, and then concrete is poured in the mold to obtain the prefabricated bottom plate.

[0054] In the second step, the insulation layer needs to be adhered to the inner side of the outer prefabricated panel, and then the outer prefabricated panel and one of the prefabricated single panels are connected together by bolts to complete the manufacture of the sandwich insulation composite shear wall.

[0055] The cross section of the vertical connecting plate 302 is a trapezoidal structure.

[0056] The horizontal mounting plate 303 is located on the side of the steel reinforcement layer 202 inside the prefabricated bottom plate.

[0057] The outer prefabricated panel comprises a prefabricated panel body, in which connection studs are arranged. During installation, the connection studs pass through the shear wall insulation layer and the prefabricated single panel in sequence and are fixed and tightened by nuts, so that the shear wall insulation layer can be firmly clamped.

[0058] Embodiment 2. A reinforced concrete composite shear wall connected by folded plates, comprising: Figure 1 As shown, it includes two prefabricated single panels 1 placed vertically and parallelly, and the two prefabricated single panels 1 are connected to each other; the prefabricated single panels 1 include a prefabricated bottom plate 7, and a folding plate 3 is provided inside the prefabricated bottom plate 7; the end of the folding plate 3 is located on the outer side of the prefabricated bottom plate 7.

[0059] The final shear wall product that is able to bear the load also includes a concrete layer located between the two prefabricated slabs.

[0060] A shear wall insulation layer 4 and an outer prefabricated panel 5 are arranged on the outer side of one of the prefabricated panels 1 (located on the outer side of the wall during installation), and the outer prefabricated panel 5 is connected to the prefabricated panel 1 on the same side via bolts 6.

[0061] The precast bottom plate 7 comprises a precast concrete layer 701, in which a precast bottom plate internal steel bar layer 702 is arranged, and the folded plate 3 is connected to the precast bottom plate internal steel bar layer 702 by welding.

[0062] The steel bar protection layer of the prefabricated base plate is generally controlled by placing a fixed thickness concrete pad under the steel bar. However, the area of ​​the steel bar is relatively small. Under the concentrated load of construction, the concrete pad is often crushed, resulting in insufficient steel bar protection layer. However, the prefabricated base plate using Z-shaped folded plates has a large bottom area, and the concrete pad is evenly stressed and not easily crushed, which is conducive to the quality control of the thickness of the steel bar protection layer.

[0063] The folding plate 3 includes a vertical plate 301, a group of vertical connecting plates 302 are provided on the top of the vertical plate 301, grooves 304 are provided between adjacent vertical connecting plates 302, and horizontal mounting plates 303 are respectively provided on both sides of the bottom of the vertical plate 301, and the horizontal mounting plates 303 on both sides are alternately distributed with each other.

[0064] The vertical connecting plate 302 is also provided with a lifting hole.

[0065] The cross section of the horizontal mounting plate 303 is an isosceles trapezoidal structure. Fig.12 The cutting and bending diagram is shown in Fig.14 As shown in the figure, the thick solid line is the cutting line and the thin dotted line is the bending line. The amount of steel used can be further reduced.

[0066] A method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates comprises the following steps:

[0067] The first step is to prepare two prefabricated veneers respectively and put them into a curing room for curing;

[0068] The second step is to hoist the two prefabricated single panels to the designated location, and weld the intersection of the folded plates on the two prefabricated single panels to obtain a shear wall.

[0069] As a finished shear wall product that can finally bear the load, it is necessary to pour concrete between the two prefabricated panels to form a concrete layer. After curing, a finished shear wall product that can bear the load can be obtained.

[0070] The specific preparation method of the prefabricated single board is as follows: the internal steel bar layer of the prefabricated bottom plate is bundled, the horizontal mounting plate at the bottom of the Z-shaped folded plate is connected to the internal steel bar layer of the prefabricated bottom plate (by welding), and then placed together in a mold, a concrete pad is placed at the bottom of the Z-shaped folded plate, and then concrete is poured in the mold to obtain the prefabricated bottom plate.

[0071] In the second step, the insulation layer needs to be adhered to the inner side of the outer prefabricated panel, and then the outer prefabricated panel and one of the prefabricated single panels are connected together by bolts to complete the manufacture of the sandwich insulation composite shear wall.

[0072] The cross section of the vertical connecting plate 302 is a trapezoidal structure.

[0073] The horizontal mounting plate 303 is located on the side of the steel reinforcement layer 202 inside the prefabricated bottom plate.

[0074] The outer prefabricated panel comprises a prefabricated panel body, in which connection studs are arranged. During installation, the connection studs pass through the shear wall insulation layer and the prefabricated single panel in sequence and are fixed and tightened by nuts, so that the shear wall insulation layer can be firmly clamped.

Claims

1. A reinforced concrete composite shear wall connected by Z-shaped folded plates, characterized in that: The invention comprises two prefabricated veneers (1) placed vertically and in parallel, and the two prefabricated veneers (1) are connected to each other; the prefabricated veneers (1) comprise a prefabricated bottom plate (7), and a shaped folding plate (3) is arranged inside the prefabricated bottom plate (7); the end of the shaped folding plate (3) is located outside the prefabricated bottom plate (7); the two prefabricated veneers (1) are connected via the shaped folding plate (3); a shear wall insulation layer (4) and an outer prefabricated plate (5) are arranged on the outer side of one of the prefabricated veneers (1), and the outer prefabricated plate (5) and the prefabricated veneer (1) located on the same side are connected via bolts (6); the prefabricated bottom plate ( 7) comprises a precast concrete layer (701), wherein a precast bottom plate internal steel bar layer (702) is arranged inside the precast concrete layer (701), and the profiled folded plate (3) is connected to the precast bottom plate internal steel bar layer (702) by welding; the profiled folded plate (3) comprises a vertical plate (301), a group of vertical connecting plates (302) are arranged on the top of the vertical plate (301), grooves (304) are arranged between adjacent vertical connecting plates (302), and horizontal mounting plates (303) are respectively arranged on both sides of the bottom of the vertical plate (301), and the horizontal mounting plates (303) on both sides are alternately distributed.

2. A reinforced concrete composite shear wall connected by Z-shaped folded plates according to claim 1, characterized in that: The vertical connecting plate (302) is also provided with a lifting hole.

3. The reinforced concrete composite shear wall connected by Z-shaped folded plates according to claim 1, characterized in that: The cross section of the horizontal mounting plate (303) is a rectangular structure.

4. The reinforced concrete composite shear wall connected by Z-shaped folded plates according to claim 1, characterized in that: The cross section of the horizontal mounting plate (303) is an isosceles trapezoidal structure.

5. A method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: The first step is to prepare two prefabricated veneers and place them in a curing room for curing; The second step is to hoist the two prefabricated single panels to the designated location, and weld the intersection of the folded plates on the two prefabricated single panels to obtain a shear wall.

6. The method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates according to claim 5, characterized in that: The specific preparation method of the prefabricated single board: 1) Cut and bend the steel plate to form a folded plate; 2) Weld the folded plate and the inner steel bar layer of the prefabricated bottom plate to form a frame; 3) Place the frame into a mold and pour concrete to obtain a prefabricated single panel.

7. The method for preparing a reinforced concrete composite shear wall connected by Z-shaped folded plates according to claim 6, characterized in that: In the second step, the insulation layer needs to be adhered to the inner side of the outer prefabricated panel, and then the outer prefabricated panel and one of the prefabricated single panels are connected together by bolts.

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