Prefabricated wall body unit for shear wall

Abstract

The utility model belongs to the technical field of prefabricated wall panels, and particularly relates to a prefabricated wall body unit for a shear wall, which comprises prefabricated plates on two sides and a connecting piece for connecting the prefabricated plates on the two sides, a cast-in-place layer is formed between the prefabricated plates on the two sides, and a steel bar truss is arranged in each prefabricated plate. Mounting points for fixing the connecting pieces are arranged on the steel bar truss, the connecting pieces are arranged on the two sides of the cast-in-place layer, the fixed ends of the connecting pieces are embedded in the prefabricated slabs and fixedly connected with the mounting points, and the lap joint parts of the connecting pieces on the two sides drag each other and prevent the prefabricated slabs on the two sides from being away from each other. The steel bar trusses are arranged in the prefabricated slabs, stable installation points are provided for the connecting pieces, the steel bar trusses and the connecting pieces can be fixedly connected in a binding or welding mode, the firmness and stability between the connecting pieces and the prefabricated slabs are improved, the separation trend of the prefabricated slabs on the two sides is effectively restrained, and the construction quality is improved. And the integrality and the anti-seismic property of the prefabricated wall body unit are obviously improved.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated wall panel technology, specifically relating to a prefabricated wall unit for shear walls. Background Technology

[0002] With the rapid development of industrialized construction, prefabricated shear wall structures have been widely used due to their advantages such as high construction efficiency and good environmental performance. Prefabricated shear walls can be divided into prefabricated solid shear walls and composite shear walls. Although the degree of assembly of composite shear walls is not as high as that of solid shear walls, the prefabricated units of composite shear walls are lighter, making them easier to transport and hoist, and they have now become the mainstream form of prefabricated shear walls.

[0003] The prefabricated unit of the composite shear wall includes prefabricated slabs on both sides and connectors for connecting the prefabricated slabs on both sides. A cast-in-place layer is formed between the prefabricated slabs on both sides. The prefabricated unit is fixed on the construction site and then poured.

[0004] However, for ease of construction, prefabricated units of composite shear walls typically embed the ends of connectors directly into the prefabricated slabs. The connection between the fixed ends of the connectors and the prefabricated slabs is not very strong. Under the horizontal load generated by the expansion of concrete during concrete pouring, the prefabricated slabs on both sides are prone to separation, resulting in a decrease in the overall structural integrity. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a precast wall unit for shear walls. By setting steel trusses within the precast slab, stable installation points are provided for the connectors. The steel trusses can be fixedly connected to the connectors by binding or welding, improving the firmness and stability between the connectors and the precast slab, effectively restraining the separation tendency of the precast slabs on both sides, significantly improving the integrity and seismic performance of the precast wall unit, and enhancing the collaborative working ability between the precast slab and the cast-in-place layer to ensure uniform load transfer.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A precast wall unit for shear walls includes precast slabs on both sides and connectors for connecting the two precast slabs. A cast-in-place layer is formed between the two precast slabs. A steel truss is provided inside the precast slab. The steel truss is provided with mounting points for fixing the connectors. The connectors are provided on both sides of the cast-in-place layer. The fixed ends of the connectors are embedded in the precast slabs and fixedly connected to the mounting points. The overlapping portions of the connectors on both sides pull each other and prevent the precast slabs on both sides from moving away from each other.

[0008] The connector includes rod-shaped inserts and U-shaped limiting bars. The limiting bars include straight sections and curved sections. The straight sections of the limiting bars form the fixed ends of the connector and are fixedly connected to the installation points of the steel truss. The curved sections of the limiting bars on both sides of the cast-in-place layer overlap vertically to form limiting holes for the inserts to pass through. The inserts prevent the limiting bars on both sides from moving away from each other.

[0009] The connector includes rod-shaped inserts and U-shaped limiting bars. The limiting bars include straight sections and curved sections. The straight sections of the limiting bars are fixedly connected to the steel truss. The curved sections of the limiting bars on both sides of the cast-in-place layer overlap vertically to form limiting holes for the inserts to pass through. The inserts prevent the limiting bars on both sides from moving away from each other.

[0010] The precast slab has a vertical back rib on one side of the cast-in-place layer. The back ribs are arranged vertically, and multiple sets of the back ribs are arranged at intervals in the horizontal direction. The inner sides of the precast slabs on both sides are formed into an arc-shaped structure by means of the back ribs.

[0011] The cross-section of the steel truss has a wave-like structure, with the crests and troughs of the steel truss forming installation points for fixing the connectors.

[0012] The crests of the steel truss are embedded in the back ribs, and the troughs of the steel truss are embedded in the precast slab.

[0013] The back ribs of the precast slabs on both sides of the cast-in-place layer are symmetrically arranged, and the gaps between adjacent back ribs form a reinforcing column layer.

[0014] The back ribs of the precast slabs on both sides of the cast-in-place layer are arranged in a comb-like cross pattern, and the gaps between the back ribs of one precast slab and the adjacent back ribs of the other precast slab are aligned.

[0015] The precast slab is also provided with a steel mesh frame, and the steel truss is fastened and fixedly connected to the steel mesh frame.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model provides a stable installation point for the connector by setting a steel truss inside the precast slab. The steel truss can be fixedly connected to the connector by binding or welding, which improves the firmness and stability between the connector and the precast slab, effectively restrains the separation tendency of the precast slabs on both sides, significantly improves the integrity and seismic performance of the precast wall unit, and enhances the collaborative working ability between the precast slab and the cast-in-place layer to ensure uniform load transfer.

[0018] 2. In this utility model, the crest of the steel truss is embedded in the back rib, forming an integral whole with the back rib concrete, which can enhance the local strength and deformation resistance of the back rib. The trough of the steel truss is embedded in the precast slab body, ensuring the structural integrity of the precast slab itself. Attached Figure Description

[0019] Figure 1 This is a top view cross-sectional structural diagram of specific embodiment 1;

[0020] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0021] Figure 3 This is a top view cross-sectional structural diagram of specific embodiment 2;

[0022] In the attached diagram, 1 is the precast slab, 2 is the cast-in-place layer, 3 is the reinforcing bar, 4 is the limiting bar, 5 is the back rib, 6 is the crest, 7 is the trough, 8 is the reinforced column layer, and 9 is the steel mesh. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] Specific embodiment 1, such as Figure 1-2 As shown, this utility model provides a precast wall unit for shear walls, including precast slabs 1 on both sides and connectors for connecting the precast slabs 1 on both sides. A cast-in-place layer 2 is formed between the precast slabs 1 on both sides. A steel truss is provided in the precast slabs 1. The steel truss is provided with mounting points for fixing the connectors. The connectors are provided on both sides of the cast-in-place layer 2. The fixed ends of the connectors are embedded in the precast slabs 1 and fixedly connected to the mounting points. The overlapping parts of the connectors on both sides pull each other and prevent the precast slabs 1 on both sides from moving away from each other.

[0025] Currently, for ease of construction, prefabricated units of composite shear walls typically have the ends of the connectors directly embedded in the prefabricated slab 1. The connection between the fixed end of the connector and the prefabricated slab 1 is not very strong. Under the action of horizontal load generated by the expansion of concrete during concrete pouring, the two prefabricated slabs 1 on both sides are prone to separation, resulting in a decrease in the overall structure.

[0026] This utility model provides a stable installation point for the connector by setting a steel truss inside the precast slab 1. The steel truss can be fixedly connected to the connector by binding or welding, which improves the firmness and stability between the connector and the precast slab 1, effectively restrains the separation tendency of the precast slabs 1 on both sides, significantly improves the integrity and seismic performance of the precast wall unit, and enhances the collaborative working ability between the precast slab 1 and the cast-in-place layer 2 to ensure uniform load transfer.

[0027] The connector includes rod-shaped inserts 3 and U-shaped limiting ribs 4. The limiting ribs 4 include a straight portion and a curved portion. The straight portion of the limiting ribs 4 forms the fixed end of the connector and is fixedly connected to the installation point of the steel truss. The curved portions of the limiting ribs 4 on both sides of the cast-in-place layer 2 overlap vertically to form limiting holes for the inserts 3 to pass through. The inserts 3 prevent the limiting ribs 4 on both sides from moving away from each other. Compared with the traditional method that requires tie rods for fixation, the connector of this utility model has a simple structure and high construction efficiency. When the precast slabs 1 on both sides tend to separate, they will pull the limiting ribs 4 on both sides to move to both sides. However, due to the presence of the inserts 3, the inserts 3 form a bidirectional constraint, preventing the limiting ribs 4 from moving to both sides, thereby preventing the precast slabs 1 from shifting due to the lateral pressure of the concrete during the pouring process.

[0028] The precast slab 1 has vertical back ribs 5 on one side of the cast-in-place layer 2. Multiple sets of back ribs 5 are arranged at intervals in the horizontal direction, and the inner sides of the precast slabs 1 on both sides are formed into an arc-shaped structure by means of the back ribs 5. The back ribs 5 on the inner side of the precast slab 1 can increase the contact area between the precast slab 1 and the cast-in-place layer 2, improve the interfacial bonding strength, and reduce crack formation.

[0029] The cross-section of the steel truss has a wave-like structure, and the crest 6 and trough 7 of the steel truss are respectively formed as installation points for fixing the connectors.

[0030] The crests 6 of the steel truss are embedded within the back ribs 5, and the troughs 7 of the steel truss are embedded within the precast slab 1. The crests 6 of the steel truss are embedded within the back ribs 5, forming an integral whole with the concrete of the back ribs 5, which can enhance the local strength and deformation resistance of the back ribs 5. The troughs 7 of the steel truss are embedded within the main body of the precast slab 1, ensuring the structural integrity of the precast slab 1 itself.

[0031] The precast slab 1 is also provided with a steel mesh 9. The steel truss and the steel mesh 9 are fastened and fixedly connected. The steel truss and the steel mesh 9 form a three-dimensional steel support system, which greatly increases the load-bearing capacity of the precast slab 1. The two work together to better disperse stress and effectively reduce the deformation risk of the precast slab 1.

[0032] The back ribs 5 of the precast slabs 1 on both sides of the cast-in-place layer 2 are symmetrically arranged, and the gaps between adjacent back ribs 5 form a reinforcing column layer 8. This specific embodiment is applicable to cases with thicker walls. The gaps between adjacent back ribs 5 form a reinforcing column layer 8, which, after being poured, together with the precast slabs 1 and the cast-in-place layer 2, forms an "I"-shaped cross section. The reinforcing column layer 8 forms localized, multi-group, spaced reinforcing columns, which significantly improves the shear and bending resistance of the wall. At the same time, the limiting reinforcement 4 on both sides located at the trough does not overlap, but because it is located within the reinforcing column layer 8, it forms a stirrup effect after combining with the cast-in-place concrete, enhancing the restraint capacity of the column layer and improving the overall seismic performance.

[0033] Specific embodiment 2 differs from specific embodiment 1 only in that the back ribs 5 of the precast slabs 1 on both sides of the cast-in-place layer 2 are arranged in a comb-like cross pattern, and the gaps between the back ribs 5 of one precast slab 1 and the adjacent back ribs 5 of the other precast slab 1 are aligned.

[0034] Specific embodiment 2 is applicable to cases where the wall is relatively thin. In this case, the connector of the crest part 6 of the precast slab 1 on one side overlaps with the connector of the trough part of the precast slab 1 on the other side, so that the same type of precast unit can cope with two wall thicknesses, thus improving the practicality of this utility model.

Claims

1. A prefabricated wall unit for a shear wall, comprising two prefabricated panels (1) and a connecting element for connecting the two prefabricated panels (1), between which a cast-in-place layer (2) is formed, characterized in that The prefabricated slab (1) is provided with a steel bar truss, the steel bar truss is provided with a mounting point for fixing a connecting piece, the connecting piece is arranged on both sides of the cast-in-place layer (2), the fixed end of the connecting piece is embedded in the prefabricated slab (1) and is fixedly connected with the mounting point, the overlapping parts of the connecting pieces on both sides pull each other and hinder the prefabricated slabs (1) on both sides from moving away from each other.

2. A precast wall unit for shear walls according to claim 1, wherein, The connecting piece comprises a rod-shaped inserting bar (3) and a U-shaped limiting bar (4), the limiting bar (4) comprises a straight part and a curved part, the straight part of the limiting bar (4) forms the fixed end of the connecting piece and is fixedly connected with the mounting point of the steel bar truss, the curved parts of the limiting bars (4) on both sides of the cast-in-place layer (2) are overlapped and form limiting holes through which the inserting bar (3) passes, and the inserting bar (3) hinders the limiting bars (4) on both sides from moving away from each other.

3. A precast wall unit for shear walls according to claim 1, wherein, The prefabricated slab (1) is provided with back battens (5) in the vertical direction on one side of the cast-in-place layer (2), the back battens (5) are arranged in the vertical direction, a plurality of groups of the back battens (5) are arranged in the horizontal direction, and the inner sides of the prefabricated slabs (1) on both sides are formed into arch-shaped structures by the back battens (5).

4. A precast wall unit for a shear wall according to claim 3, wherein, The cross section of the steel bar truss is in a wave-shaped structure, the wave crest (6) and the wave trough (7) of the steel bar truss are respectively formed into mounting points for fixing the connecting piece.

5. A precast wall unit for a shear wall according to claim 4, wherein, The wave crest (6) of the steel bar truss is embedded in the back batten (5), and the wave trough (7) of the steel bar truss is embedded in the prefabricated slab (1).

6. A precast wall unit for a shear wall according to claim 5, wherein, The back battens (5) of the prefabricated slabs on both sides of the cast-in-place layer (2) are symmetrically arranged, and the gaps between adjacent back battens (5) form a reinforcing column layer (8).

7. A precast wall unit for shear walls according to claim 5, wherein, The back battens (5) of the prefabricated slabs (1) on both sides of the cast-in-place layer (2) are arranged in a comb-tooth shape, and the gaps between the back battens (5) of one side of the prefabricated slab (1) and the adjacent back battens (5) of the other side of the prefabricated slab (1) are aligned.

8. A precast wall unit for shear walls according to claim 4, wherein, The prefabricated slab (1) is further provided with a steel bar net rack (9), and the steel bar truss and the steel bar net rack (9) are snap-fit arranged and fixedly connected.

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