Rapid splicing joints for PVA fiber reinforced concrete prefabricated shear walls

Abstract

This utility model discloses a rapid assembly node for a PVA fiber reinforced concrete prefabricated shear wall, including a first prefabricated wall, a second prefabricated wall, connecting plates, connecting grooves, bolts, and nuts. The first prefabricated wall has two upper fixing frames inside, each with a vertically arranged connecting plate fixed at its bottom. The connecting plates are exposed below the first prefabricated wall, and the two connecting plates are parallel to each other. The second prefabricated wall has two lower fixing frames inside, each with an upward-opening connecting groove fixed at its top. Part of the connecting groove is located inside the second prefabricated wall, and part is exposed above it. This utility model simplifies the assembly of the shear wall by directly fixing the nuts to the connecting grooves, allowing the bolts to be easily screwed onto the nuts.

Description

Technical Field

[0001] This utility model relates to the technical field of building construction, and in particular to the technical field of rapid splicing nodes for shear walls. Background Technology

[0002] Existing prefabricated shear wall joint connections are mainly wet-work operations: common connection methods such as grouting sleeves require on-site binding, formwork, grouting, and curing, resulting in long construction cycles and high precision requirements; high material costs: embedded sleeves and grouting materials are expensive; low construction efficiency: wet operations involve many steps and are greatly affected by weather and worker skill levels, making rapid assembly impossible; limited performance of precast components: traditional precast concrete components still have shortcomings in crack resistance, toughness, and impact resistance.

[0003] Existing patent CN221663965U discloses a prefabricated shear wall splicing node structure. The first prefabricated wall and the second prefabricated wall are connected by two sets of first connecting plates and second connecting plates interlocking. The prefabricated wall can be prefabricated as a whole, without the need to pour concrete between the two side composite plates to form the wall. The amount of cast-in-place work is small, the number of prefabricated components required for assembly is small, and the assembly rate is high. The first connecting plate is inserted into the second connecting plate as a whole without the need for grouting. The interlocking part is relatively wide, and the connecting plate is not easily deformed, ensuring accurate connection of the prefabricated wall. However, it requires the first prefabricated wall to be placed on the second cavity and then the first connecting plate and the second connecting plate are connected together using bolts and nuts. Since the nut is located inside the pouring space, and the pouring space is long and narrow, it is difficult to place the nut in the designated position to cooperate with the bolt. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the existing technology and to propose a quick splicing node for PVA fiber concrete prefabricated shear walls. Nuts are directly fixed on the connecting groove, and bolts can be easily screwed onto the nuts, making the assembly of shear walls more convenient.

[0005] To achieve the above objectives, this utility model proposes a rapid splicing node for PVA fiber reinforced concrete prefabricated shear walls, comprising a first prefabricated wall, a second prefabricated wall, connecting plates, connecting grooves, bolts, and nuts. The first prefabricated wall has two upper fixing frames inside, each with a vertically arranged connecting plate fixed to its bottom. The connecting plates are exposed below the first prefabricated wall and are parallel to each other. The second prefabricated wall has two lower fixing frames inside, each with an upward-opening connecting groove fixed to its top. A portion of the connecting groove is located within the second prefabricated wall. Inside, a portion of the connecting groove is exposed above the second precast wall. The connecting plate corresponds to the connecting groove one by one, and the connecting plate is inserted into the connecting groove. Several nuts are fixed on the adjacent sides of the two connecting grooves. The nuts are equipped with bolts. The nuts pass through the connecting groove and the connecting plate and are screwed onto the nuts. The head of the bolt and the nut are located on both sides of the connecting groove. Both the connecting groove and the connecting plate are provided with through holes that allow the bolts to pass through. The area enclosed by the first precast wall, the second precast wall, the connecting plate and the connecting groove forms a casting cavity, in which PVA fiber concrete is poured.

[0006] Preferably, the first precast wall has a pouring channel inside that is connected to the pouring cavity. One end of the pouring channel is located on one side wall of the first precast wall, and the other end of the pouring channel is located on the bottom surface of the first precast wall.

[0007] Preferably, the bottom surface of the upper fixing frame is a plane, and the bottom surface of the upper fixing frame is flush with the bottom surface of the first precast wall, and the upper surface of the connecting groove abuts against the bottom surface of the upper fixing frame.

[0008] Preferably, the upper fixing frames are connected by a number of first connecting rods, and the lower fixing frames are connected by a number of second connecting rods.

[0009] Preferably, the first precast wall has several steel bars that extend vertically downward to the outside of the first precast wall to form reinforcing bars, and the top of the second precast wall has several grooves that correspond one-to-one with the reinforcing bars, with the reinforcing bars extending into the corresponding grooves.

[0010] The beneficial effects of this utility model are as follows: By directly fixing the nut to the connecting groove, the bolt can be easily screwed onto the nut, making the assembly of the shear wall more convenient; the casting channel is set inside the first precast wall, making it convenient to pour PVA fiber concrete into the casting cavity, thus accelerating the splicing speed and efficiency of the shear wall.

[0011] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1This is the front view of the quick-assembly node of the PVA fiber concrete prefabricated shear wall of this utility model.

[0013] In the figure: 1-First precast wall, 2-Second precast wall, 3-Pouring cavity, 10-First connecting rod, 11-Upper fixing frame, 12-Connecting plate, 13-Bolt, 15-Reinforcing rib, 16-Pouring channel, 20-Second connecting rod, 21-Lower fixing frame, 22-Connecting groove, 23-Nut, 25-Groove. Detailed Implementation

[0014] Example 1:

[0015] See Figure 1 The present invention relates to a quick splicing node for a PVA fiber reinforced concrete prefabricated shear wall, comprising a first prefabricated wall 1, a second prefabricated wall 2, a connecting plate 12, a connecting groove 22, bolts 13, and nuts 23. The first prefabricated wall 1 is provided with two upper fixing frames 11 inside, and each upper fixing frame 11 has a vertically arranged connecting plate 12 fixed at its bottom. The connecting plate 12 is exposed below the first prefabricated wall 1, and the two connecting plates 12 are parallel to each other.

[0016] The second precast wall 2 is provided with two lower fixing brackets 21 inside. Each lower fixing bracket 21 has an upward-opening connecting groove 22 fixed on its top. Part of the connecting groove 22 is located inside the second precast wall 2, and part of the connecting groove 22 is exposed above the second precast wall 2.

[0017] The connecting plate 12 corresponds to the connecting groove 22 one by one. The connecting plate 12 is inserted into the connecting groove 22. Several nuts 23 are fixed on the adjacent sides of the two connecting grooves 22. The nuts 23 are equipped with bolts 13. The nuts 23 pass through the connecting groove 22 and the connecting plate 12 and are screwed onto the nuts 23. The head of the bolt 13 and the nut 23 are located on both sides of the connecting groove 22. The connecting groove 22 and the connecting plate 12 are provided with through holes that allow the bolts 13 to pass through.

[0018] The area enclosed by the first precast wall 1, the second precast wall 2, the connecting plate 12 and the connecting groove 22 forms a casting cavity 3, in which PVA fiber concrete is poured.

[0019] Example 2:

[0020] To facilitate the pouring of the pouring cavity 3, the first precast wall 1 is provided with a pouring channel 16 that is connected to the pouring cavity. One end of the pouring channel 16 is located on one side wall of the first precast wall 1, and the other end of the pouring channel 16 is located on the bottom surface of the first precast wall 1.

[0021] Example 3:

[0022] In order to prevent the connecting groove 22 from damaging the first precast wall 1, the bottom surface of the upper fixing frame 11 is a plane, the bottom surface of the upper fixing frame 11 is flush with the bottom surface of the first precast wall 1, and the upper surface of the connecting groove 22 abuts against the bottom surface of the upper fixing frame 11.

[0023] Example 4:

[0024] To ensure the accuracy of the spacing between the upper fixed frames 11 and the lower fixed frames 21, several first connecting rods 10 are connected between the upper fixed frames 11, and several second connecting rods 20 are connected between the lower fixed frames 21.

[0025] Example 5:

[0026] In order to improve the strength of the spliced ​​shear wall, there are several steel bars in the first precast wall 1 that extend vertically downward to the outside of the first precast wall 1 to form reinforcing bars 15. The top of the second precast wall 2 is provided with several grooves 25 that correspond one-to-one with the reinforcing bars 15, and the reinforcing bars 15 extend into the corresponding grooves 25.

[0027] Example 6:

[0028] Both the upper fixing frame 11 and the lower fixing frame 21 are steel frames, the connecting plate 12 is a steel plate, and the connecting groove 22 is a steel groove. The steel grade used in the upper fixing frame 11, the lower fixing frame 21, the connecting plate 12, and the connecting groove 22 is the same as the steel grade used in the first precast wall 1 and the second precast wall 2. The nut 23 is welded to the connecting groove 22.

[0029] The working process of this utility model:

[0030] In the process of constructing the quick splicing node of the PVA fiber concrete prefabricated shear wall of this utility model, the first prefabricated wall 1 is hoisted and placed on the second prefabricated wall 2, the connecting plate 11 is inserted into the connecting groove 22, the bolt 13 passes through the through hole on the connecting plate 11 and the connecting groove 22 and is screwed onto the nut 23. After tightening, PVA fiber concrete is poured into the pouring cavity 3 through the pouring channel 16.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A rapid splicing joint for PVA fiber reinforced concrete prefabricated shear walls, characterized in that: The system includes a first precast wall (1), a second precast wall (2), a connecting plate (12), a connecting groove (22), bolts (13), and nuts (23). The first precast wall (1) has two upper fixing frames (11) inside, each with a vertically arranged connecting plate (12) fixed at its bottom. The connecting plate (12) is exposed below the first precast wall (1), and the two connecting plates (12) are parallel to each other. The second precast wall (2) has two lower fixing frames (21) inside, each with an upward-opening connecting groove (22) fixed at its top. Part of the connecting groove (22) is located inside the second precast wall (2), and part of the connecting groove (22) is exposed above the second precast wall (2). The connecting plate (12) corresponds one-to-one with the connecting groove (22). The connecting plate (12) is inserted into the connecting groove (22). Several nuts (23) are fixed on the adjacent sides of the two connecting grooves (22). The nuts (23) are equipped with bolts (13). The nuts (23) pass through the connecting groove (22) and the connecting plate (12) and are screwed onto the nuts (23). The head of the bolt (13) and the nut (23) are located on both sides of the connecting groove (22). The connecting groove (22) and the connecting plate (12) are provided with through holes that allow the bolts (13) to pass through. The area enclosed by the first precast wall (1), the second precast wall (2), the connecting plate (12) and the connecting groove (22) forms a casting cavity (3). PVA fiber concrete is poured into the casting cavity (3).

2. The rapid splicing node of the PVA fiber reinforced concrete prefabricated shear wall as described in claim 1, characterized in that: The first precast wall (1) has a pouring channel (16) connected to the pouring cavity inside. One end of the pouring channel (16) is located on one side wall of the first precast wall (1), and the other end of the pouring channel (16) is located on the bottom surface of the first precast wall (1).

3. The rapid splicing node of the PVA fiber reinforced concrete prefabricated shear wall as described in claim 1, characterized in that: The bottom surface of the upper fixing frame (11) is a plane, and the bottom surface of the upper fixing frame (11) is flush with the bottom surface of the first precast wall (1). The upper surface of the connecting groove (22) abuts against the bottom surface of the upper fixing frame (11).

4. The rapid splicing node of the PVA fiber reinforced concrete prefabricated shear wall as described in claim 1, characterized in that: The upper fixed frame (11) is connected to several first connecting rods (10), and the lower fixed frame (21) is connected to several second connecting rods (20).

5. The rapid splicing node of the PVA fiber reinforced concrete prefabricated shear wall as described in claim 1, characterized in that: The first precast wall (1) has several steel bars that extend vertically downward to the outside of the first precast wall (1) to form reinforcing bars (15). The top of the second precast wall (2) is provided with several grooves (25) that correspond one-to-one with the reinforcing bars (15). The reinforcing bars (15) extend into the corresponding grooves (25).

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