High-strength precast slab wet-work connector

Abstract

The utility model relates to building construction technical field especially high strength prefabricated slab wet operation connecting piece, including wallboard, the one end of wallboard is fixed with first connecting piece, the end of wallboard away from first connecting piece is fixed with second connecting piece uniformly, the side wall of second connecting piece is inserted with several high -strength bolts, the end of high -strength bolt is all threadedly connected with high -strength nut, the middle of first connecting piece is all set up with first filling groove, the utility model discloses compared with traditional prefabricated slab wet operation connecting piece, through wallboard, first connecting piece, second connecting piece cooperation makes first filling groove and second filling groove and enclose the closed space, again through high -strength bolt, high -strength nut, first hole groove and second hole groove cooperation, has improved the stability that first connecting piece and second connecting piece connect, thereby reduces the formwork installation, pours concrete to first filling groove and second filling groove inside again, thereby reduces the leakage of pulp, thereby improves the sealing property and stability of wallboard junction.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a wet-working connector for high-strength precast slabs. Background Technology

[0002] Precast slab wet-work connectors are key components that ensure the stable connection of precast slabs. In wet-work construction, the components are connected by pouring concrete or grouting on site.

[0003] The common types of existing precast slab wet-work connectors include rebar connectors and embedded part connectors. Rebar connectors mainly use straight thread or tapered thread joints, which are mechanically connected or welded to firmly connect the protruding rebars of the precast slab and transmit tensile and compressive forces. Embedded part connectors are made by pre-embedding steel plates, bolts, etc. during the production of precast slabs, and the connection is completed on site by welding, bolt tightening or grouting.

[0004] Existing precast slab wet-work connectors typically require construction workers to install formwork to seal the connectors before grouting. During grouting, concrete may leak from the side wall of the formwork, thus affecting the sealing and stability of the precast slab connection. Utility Model Content

[0005] To overcome the problem that existing precast slab wet-work connectors usually require construction workers to install formwork to seal the connectors before grouting, which may cause concrete to leak from the side wall of the formwork during grouting, thus affecting the sealing and stability of the precast slab connection.

[0006] The technical solution of this utility model is as follows: a high-strength precast slab wet-work connector, including a wall panel, a first connector fixed at one end of the wall panel, a second connector fixed at the end of the wall panel away from the first connector, a plurality of high-strength bolts inserted into the side wall of the second connector, a high-strength nut threadedly connected to the end of each high-strength bolt, a first filling groove opened in the middle of each first connector, a plurality of first holes opened in the side wall of each first filling groove, a second filling groove opened in the middle of each second connector, a connecting plate fixed at the end of each second connector, a second hole opened in the side wall of each connecting plate.

[0007] Furthermore, two slots are provided on the inner sidewall of the first filling groove, and the connecting plate is sequentially engaged inside the slots, which improves the convenience of installation and positioning of the first and second slots.

[0008] Furthermore, both the first and second slots are linearly distributed, and high-strength bolts are sequentially inserted between the first and second slots.

[0009] Furthermore, the other end of the high-strength bolt passes through both the first and second connectors, and two washers are fitted on the outer surface of the high-strength bolt to improve its anti-slip properties.

[0010] Furthermore, several sets of reinforcing ribs are fixed on the side wall of the first connector, and the other end of each reinforcing rib is fixed on the side wall of the second connector.

[0011] Furthermore, an embedded part is fixed at the bottom of the wall panel, and a first through groove is opened at the top of the embedded part for the wall panel to be snapped in.

[0012] Furthermore, several positioning steel bars are inserted into the bottom of the wall panel, and several third slots are opened at the top of the wall panel. A locking block is opened in the middle of the bottom of the first through slot, and several positioning posts are fixed in the bottom of the locking block for the positioning steel bars to be inserted, which improves the positioning accuracy of the bottom of the wall panel.

[0013] Furthermore, a wing plate is fixedly provided at the bottom end of the embedded part, and the wing plate and the embedded part are fixedly connected to form an integrated structure, which improves the stability of the embedded part.

[0014] The beneficial effects of this utility model are:

[0015] Compared to traditional precast panel wet-work connectors, this method uses wall panels, first connectors, and second connectors to form a closed space around the first and second filling grooves. High-strength bolts, high-strength nuts, and the first and second slots work together to improve the stability of the connection, reducing the need for formwork installation. Concrete is then poured into the first and second filling grooves, reducing grout leakage and improving the sealing and stability of the wall panel connection. Secondly, the inclusion of slots for connector plate insertion improves the ease of positioning the first and second slots and enhances the sealing of the joint between the first and second connectors. Finally, the inclusion of reinforcing ribs, which act as transverse reinforcements cast sequentially inside the wall panel, improves the ease of installation and positioning of the first and second connectors, while also enhancing the stability of the precast wall panels and the first and second connectors. Attached Figure Description

[0016] Figure 1 The diagram shown is an overall structural representation of the precast slab wet-working connector of this utility model. Figure 1 ;

[0017] Figure 2 The diagram shown is a schematic representation of the overall structure of this utility model. Figure 2 ;

[0018] Figure 3 The diagram shown is a schematic representation of the wall panel structure of this utility model.

[0019] Figure 4 The diagram shown is a schematic representation of the structure of the first connecting member of this utility model.

[0020] Figure 5The diagram shown is a schematic diagram of the embedded part structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Wall panel; 2. First connector; 3. Second connector; 4. Embedded part; 5. First filling groove; 6. First hole groove; 7. Slot; 8. High-strength bolt; 9. Second filling groove; 10. Connecting plate; 11. Second hole groove; 12. Third hole groove; 13. Positioning steel bar; 14. High-strength nut; 15. Washer; 16. Reinforcing rib; 17. First through groove; 18. Locking block; 19. Positioning column; 20. Wing plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Among the currently discovered feasible technologies, the following are described:

[0024] Precast slab wet-work connectors are key components in prefabricated buildings and engineering structures, enabling reliable connections between precast components through on-site concrete pouring or cement-based material injection. They play a crucial role in ensuring the integrity and safety of the structure.

[0025] The core of wet-work connection lies in forming a cohesive whole between the precast slab and adjacent components through post-cast concrete or grouting. Its principle is based on interfacial bonding and mechanical anchoring: the precast slab has pre-reinforced steel bars, rough surfaces, or keyways that tightly interlock with the post-cast material; connectors (such as reinforcing bars and embedded parts) transfer stress, enabling the precast components to work collaboratively under tensile, compressive, and shear loads. Compared to dry connections (such as bolted connections), this connection method significantly improves the seismic performance and overall integrity of the structure, making it suitable for building and infrastructure projects with high requirements for connection strength.

[0026] Grouting sleeve connection: High-strength grout fills the gap between the metal sleeve and the reinforcing bar to form a reliable anchorage. It is divided into fully grouted sleeves (connected to reinforcing bars at both ends) and semi-grouted sleeves (threaded connection at one end, grout at the other). It is commonly used for connecting vertical components in prefabricated buildings. Its advantages are direct force transmission and convenient construction, but it requires extremely high precision in reinforcing bar positioning and strict control of grout fullness; otherwise, connection failure is likely.

[0027] Grouting and anchoring lap connection: Holes are pre-drilled in the precast slab, lapped reinforcing bars are inserted, and grout is poured in. It is suitable for lapping of smaller diameter reinforcing bars and has a lower cost, but the lap length is longer and occupies more space. It is necessary to ensure the sealing of the holes to prevent grout leakage.

[0028] Mechanical connections (such as straight threaded sleeves): The reinforcing bars of the precast slab are first threaded, and the connection is achieved by mechanically tightening the sleeve, followed by pouring concrete to encase it. This method has high construction efficiency and stable quality, and is often used for the lateral connection of precast bridge beams.

[0029] Steel plate welding connection: Steel plates are embedded in the precast slab, and the steel plates of adjacent components are fixed on site by welding or bolts, and finally concrete is poured to seal it. It is suitable for non-major load-bearing parts, such as the connection of precast balconies and stairs, but the welding quality is easily affected by the environment and anti-corrosion treatment is required.

[0030] Bolted connection combined with post-cast concrete: High-strength bolts are used to initially fix the precast slabs, and then post-cast concrete is used to form a rigid connection; a typical example is the connection between precast bridge cap beams and piers, where bolts provide temporary support and concrete ensures long-term stability.

[0031] Please refer to Figures 1-5 A high-strength precast concrete slab wet-work connector includes a wall panel 1, which is made of concrete and precast. One end of the wall panel 1 is fixedly connected to a first connector 2 via concrete bonding. Second connectors 3 are fixed to the ends of the wall panel 1 away from the first connector 2. Both the first and second connectors 2 and 3 are made of cast iron and have good rigidity. Several high-strength bolts 8 are inserted into the sidewalls of the second connectors 3, and high-strength nuts 14 are threaded to the ends of the high-strength bolts 8. The high-strength bolts 8 and high-strength nuts 14 are used to connect the first connector 2 and the second connector 3. A first filling groove 5 is formed in the middle of each of the first connectors 2, and several first slots 6 are formed on the sidewalls of the first filling grooves 5. A second filling groove 9 is formed in the middle of each of the second connectors 3. A connecting plate 10 is fixed to the end of each of the second connectors 3, and second slots 11 are formed on the sidewalls of the connecting plate 10. The slots 6 and 11 are linearly distributed. High-strength bolts 8 are inserted sequentially into the middle of the slots 6 and 11, thereby improving the stability of the connection between the first connector 2 and the second connector 3. Two slots 7 are opened on the inner sidewall of the first filling groove 5. The connecting plate 10 is sequentially inserted into the slot 7, which improves the convenience of the installation and positioning of the slots 6 and 11. The first connector 2, the second connector 3, the slots 7 and the connecting plate 10 cooperate to form a closed space for grouting. Grouting is a construction technique that injects cement grout into the gaps, holes or strata of the structure by pressure or gravity flow. Grouting is an existing technology and will not be described in detail here. This avoids the outflow of cement grout, thereby improving the stability and sealing of the connection of the wall panel 1. The first connector 2 and the second connector 3 are rigidly connected and supported to prevent cracks from forming at the connection later, thereby improving the construction quality.

[0032] The other end of the high-strength bolt 8 passes through the first connector 2 and the second connector 3. Two washers 15 are fitted on the outer surface of the high-strength bolt 8 to improve its anti-slip properties. Several sets of reinforcing ribs 16 are fixed on the side wall of the first connector 2. The other end of the reinforcing ribs 16 is fixed on the side wall of the second connector 3. The reinforcing ribs 16 are cast into the interior of the wall panel 1 as transverse steel bars, which improves the convenience of installation and positioning of the first connector 2 and the second connector 3. At the same time, it improves the stability of the prefabrication of the wall panel 1, the first connector 2 and the second connector 3. The first connector 2 and the second connector 3 can be used as side formwork support and limit, which can reduce the formwork installation in the construction of prefabricated panels.

[0033] The bottom end of the wall panel 1 is fixedly provided with an embedded part 4. The top end of the embedded part 4 is provided with a first through groove 17 for the wall panel 1 to be snapped in. Several positioning steel bars 13 are inserted into the bottom end of the wall panel 1. Several third holes 12 are provided at the top end of the wall panel 1. The third holes 12 are used to reduce the weight of the wall panel 1. A locking block 18 is provided in the middle bottom of the first through groove 17. Several positioning posts 19 are fixedly provided in the inner bottom of the locking block 18 for the positioning steel bars 13 to be inserted in, which improves the positioning accuracy of the bottom end of the wall panel 1. The bottom end of the embedded part 4 is fixedly provided with a wing plate 20. The wing plate 20 and the embedded part 4 are fixedly connected to form an integrated structure, which improves the stability of the embedded part 4.

[0034] When using this precast panel wet-work connector, the operator first moves the device to the designated position, embeds the pre-embedded part 4 into the surface of the building foundation, making the inner bottom of the first through groove 17 flush with the surface of the building foundation. Then, the positioning steel bars 13 are inserted into the interior of the positioning column 19 in sequence, thereby improving the installation and positioning accuracy of the wall panel 1. The wall panel 1, the first connector 2, and the second connector 3 are then sequentially engaged in the middle of the first through groove 17, thereby closing the locking block 18. Grout is then poured into the locking block 18 and vibrated evenly. The concrete solidifies, fixing the wall panel 1. When it is necessary to extend the wall panel 1, the two connecting plates 10 are sequentially inserted into the interior of the locking groove 7, from... This improves the ease of installation and positioning of the first slot 6 and the second slot 11. High-strength bolts 8 are then sequentially inserted between the first slot 6 and the second slot 11, and high-strength nuts 14 are threaded onto the ends of the high-strength bolts 8. This enhances the stability of the connection between the first connector 2 and the second connector 3. The first connector 2, the second connector 3, the slot 7, and the connecting plate 10 work together to form a closed space for grouting, preventing cement grout from flowing out and thus improving the stability and sealing of the wall panel 1 connection. The rigid connection and support of the first connector 2 and the second connector 3 prevent cracks from forming at the connection later, thereby improving the construction quality.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength precast slab wet-work connector, characterized in that, The wall panel (1) includes a first connector (2) fixed at one end of the wall panel (1), a second connector (3) fixed at the end of the wall panel (1) away from the first connector (2), a number of high-strength bolts (8) inserted into the side wall of the second connector (3), and a high-strength nut (14) threaded to the end of the high-strength bolts (8). A first filling groove (5) is opened in the middle of the first connector (2), a number of first holes (6) are opened on the side wall of the first filling groove (5), a second filling groove (9) is opened in the middle of the second connector (3), and a connecting plate (10) is fixed at the end of the second connector (3). A second hole (11) is opened on the side wall of the connecting plate (10).

2. The high-strength precast slab wet-working connector according to claim 1, characterized in that: Two slots (7) are provided on the inner side wall of the first filling groove (5), and the connecting plate (10) is sequentially engaged in the slot (7).

3. The high-strength precast slab wet-working connector according to claim 1, characterized in that: The first slot (6) and the second slot (11) are linearly distributed, and the high-strength bolt (8) is inserted in the middle of the first slot (6) and the second slot (11) in sequence.

4. The high-strength precast slab wet-working connector according to claim 1, characterized in that: The other end of the high-strength bolt (8) passes through the first connector (2) and the second connector (3), and two washers (15) are fitted on the outer surface of the high-strength bolt (8).

5. The high-strength precast slab wet-working connector according to claim 1, characterized in that: Several sets of reinforcing ribs (16) are fixed on the side wall of the first connector (2), and the other end of each reinforcing rib (16) is fixed on the side wall of the second connector (3).

6. The high-strength precast slab wet-working connector according to claim 1, characterized in that: The bottom end of the wall panel (1) is fixed with an embedded part (4), and the top end of the embedded part (4) is provided with a first through groove (17) for the wall panel (1) to be snapped in.

7. The high-strength precast slab wet-working connector according to claim 6, characterized in that: The bottom end of the wall panel (1) is connected to several positioning steel bars (13), the top end of the wall panel (1) is provided with several third holes (12), the bottom of the middle of the first through groove (17) is provided with a locking block (18), and the bottom of the locking block (18) is fixed with several positioning posts (19) for the positioning steel bars (13) to be inserted.

8. The high-strength precast slab wet-working connector according to claim 7, characterized in that: A wing plate (20) is fixedly provided at the bottom end of the wall panel (1), and the wing plate (20) and the embedded part (4) are fixedly connected to form an integrated structure.

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