Connecting joint structure of laminated slab and beam
By designing a combination of reinforcing bars and connecting steel bars in the connection nodes of composite slabs and beams, the collision problem during hoisting was solved, construction efficiency and connection strength were improved, and the safety and stability of the structure were ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-13
AI Technical Summary
During the hoisting of composite slabs, the reinforcing bars are prone to collision with the pre-embedded reinforcing bars of the beams, leading to construction difficulties, increased labor costs, and impact on the construction period.
Each set of reinforcing bars was designed to be located on both sides of the beam and connected by connecting steel bars. Avoidance grooves and protrusions were set on the composite slab to control the extension length and hoisting position of the reinforcing bars. Tie wire was used to bind the connection, thus optimizing the construction process.
It improved hoisting efficiency, enhanced the connection strength between the composite slab and the beam, and improved the overall structural safety, while reducing construction and labor costs.
Smart Images
Figure CN223991451U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of building structures, and in particular to a connection node structure for composite slabs and beams. Background Technology
[0002] Composite floor slabs are a type of composite structural component consisting of precast concrete slabs and cast-in-place concrete layers. Precast concrete slabs are also commonly referred to as composite slabs.
[0003] With the promotion of prefabricated concrete buildings, composite slabs are being used more and more widely. However, the problems of traditional composite slabs in engineering applications are becoming more and more obvious.
[0004] The composite floor slab has horizontal or longitudinal reinforcing bars extending along its sides to form "bearded bars," which are used to connect with the pre-embedded reinforcing bars of the beams via cast-in-place concrete. The pre-embedded reinforcing bars include several ring stirrups and several longitudinal reinforcing bars passing through the inner ring of the ring stirrups. The longitudinal reinforcing bars are connected to the ring stirrups by tying. However, the main problem is that the bearded bars of the composite slab negatively impact construction. During the hoisting of the composite floor slab, the bearded bars must first extend from top to bottom into the gaps between the pre-embedded reinforcing bars in the beam to ensure proper placement. This often leads to collisions between the bearded bars and the longitudinal reinforcing bars, making it difficult to hoist the composite slab into position smoothly. Construction workers must frequently adjust the position of the composite slab, increasing labor costs and impacting the construction schedule. This needs improvement. Utility Model Content
[0005] The purpose of this application is to provide a connection node structure between composite slabs and beams to avoid collision between reinforcing bars and embedded reinforcing bars in the beams.
[0006] The technical solution for the connection node structure of composite slab and beam provided in this application is as follows: it includes a beam and two composite slabs. The beam is provided with embedded steel bars, which are located between the two composite slabs. Each composite slab has a number of reinforcing bars spaced apart on the side near the embedded steel bars. Every two reinforcing bars form a group. The two reinforcing bars in each group are located on opposite sides of the beam. The two reinforcing bars in the same group are located on the two composite slabs respectively. The two reinforcing bars in each group correspond one-to-one, and the two reinforcing bars are connected by connecting steel bars.
[0007] By adopting the above technical solution and controlling the extension length and hoisting position of the reinforcing bars, there is no need to consider the collision between the reinforcing bars and the longitudinal reinforcement bars on the beam when hoisting the composite slab. This can speed up the hoisting construction efficiency and improve the convenience of construction. At the same time, before pouring the concrete, the connecting reinforcement bars are tied between the reinforcing bars to improve the connection strength between the composite slabs and between the composite slabs and the beams, ensuring the integrity and safety of the structure.
[0008] Optionally, the composite plate has several protrusions spaced apart on the side near the pre-embedded steel bar, and a clearance groove is formed between two adjacent protrusions. A reinforcing bar is placed in the clearance groove, and one end of the reinforcing bar near the pre-embedded steel bar is located in the clearance groove.
[0009] By adopting the above technical solution and setting the clearance groove, the length of the reinforcing bars can be adjusted during the precast composite slab without changing the overall size of the concrete part of the composite slab. The clearance groove can provide operating space for connecting the reinforcing bars and the reinforcing bars, and the uneven contact surface is also conducive to improving the connection strength between the composite slab and the cast-in-place concrete.
[0010] Optionally, the clearance groove is arranged vertically through the entire space.
[0011] By adopting the above technical solution, the vertically penetrating clearance groove provides more room for the connection between the reinforcing bar and the connecting steel bar through the tie wire, thereby improving the efficiency of the connection between the reinforcing bar and the connecting steel bar.
[0012] Optionally, the protrusion is a trapezoidal block, and the closest distance between two adjacent trapezoidal blocks gradually decreases in the direction away from the composite plate.
[0013] By adopting the above technical solution, the trapezoidal block increases the contact area between the cast-in-place concrete and the trapezoidal block, and the cast-in-place concrete and the trapezoidal block form a snap-fit connection, further improving the connection strength between the composite slab and the cast-in-place concrete.
[0014] Optionally, the reinforcing bar and the connecting reinforcing bar are connected by binding wire.
[0015] By adopting the above technical solution, the reinforcing bars and connecting steel bars are connected by binding wire, making the connection method simple and reliable, facilitating construction operations, and effectively improving the integrity and stability of the connection node, avoiding the loosening or detachment problems that may occur in traditional connection methods. In addition, this connection method does not require additional complex equipment or processes, reducing construction costs and improving construction efficiency.
[0016] Optionally, the shortest distance between two adjacent clearance slots is the same.
[0017] By adopting the above technical solutions, the evenly distributed clearance grooves and reinforcing bars help optimize stress transfer, reduce stress concentration, and improve the overall load-bearing capacity of the structure. At the same time, this uniform design also facilitates the binding of connecting reinforcing bars during construction, improving construction efficiency and reducing labor costs.
[0018] Optionally, the side of the protrusion closest to the embedded steel bar and the inner wall of the clearance groove are both rough-surfaced.
[0019] By adopting the above technical solution, the roughened surface can significantly increase the contact area and friction between the composite slab and the cast-in-place concrete, thereby improving the overall connection strength between the composite slab and the beam. The roughened surface can further enhance the bonding performance between the composite slab and the cast-in-place concrete layer, reduce slippage between them, and effectively improve the integrity and stability of the structure.
[0020] A mold for manufacturing composite panels includes four first templates that form a receiving cavity. Each first template has a plurality of forming blocks spaced apart on the side near the receiving cavity. The forming blocks are provided with grooves for inserting tendons.
[0021] By adopting the above technical solution, this design can precisely control the position and shape of the tendons and protrusions, ensuring the reasonable distribution of the tendons in the laminated plate, thereby improving the production efficiency and quality of the laminated plate. At the same time, the mold structure is simple, easy to disassemble and maintain, and reduces production costs.
[0022] Optionally, the side of each first template closest to the receiving cavity and the outer surface of the molding block are both rough surfaces.
[0023] By adopting the above technical solution, the rough surface on the first template enhances the bonding force between the mold and the concrete, increases the surface roughness of the composite slab, and thus improves the adhesion between the composite slab and the cast-in-place concrete layer. This design helps reduce the possibility of delamination during the use of the composite slab and improves the overall structural stability.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. By controlling the extension length and hoisting position of the reinforcing bars, there is no need to consider the collision between the reinforcing bars and longitudinal reinforcement when hoisting the composite slab, which can speed up the hoisting construction efficiency and improve the convenience of construction. At the same time, before pouring the concrete, the connecting reinforcement is tied between the reinforcing bars to improve the connection strength between the composite slabs and between the composite slabs and the beams, ensuring the integrity and safety of the structure.
[0026] 2. The through-hole groove provides more room for the connection between the reinforcing bar and the connecting bar through the tie wire, thus improving the efficiency of the connection between the reinforcing bar and the connecting bar. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the connection node between the composite slab and the beam in an embodiment of this application.
[0028] Figure 2 yes Figure 1 An enlarged view of region A.
[0029] Figure 3This is a schematic diagram of the overall structure of two composite plates.
[0030] Figure 4 yes Figure 3 A magnified view of region B.
[0031] Figure 5 This is a structural schematic diagram of another embodiment of the bump.
[0032] Figure 6 yes Figure 5 A magnified view of region C.
[0033] Figure 7 This is a schematic diagram of the overall structure of the mold used to manufacture the composite plate according to an embodiment of this application.
[0034] Figure 8 yes Figure 7 A magnified view of region D.
[0035] Explanation of reference numerals in the attached drawings: 1. Beam; 11. Embedded steel bar; 2. Composite slab; 21. Protrusion; 22. Clearance groove; 23. Beard bar; 3. Connecting steel bar; 4. Tie wire; 5. First template; 51. Receiving cavity; 52. Forming block; 521. Groove. Detailed Implementation
[0036] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.
[0037] This application discloses a connection node structure for composite slabs and beams.
[0038] Combination Figure 1 and Figure 2 As shown, a connection node structure between a composite slab and a beam includes a beam 1 and two composite slabs 2, both located above the beam 1 and on opposite sides of the beam 1. Embedded reinforcing bars 11 are spaced apart on the upper surface of the beam 1. Each embedded reinforcing bar 11 includes several longitudinal reinforcing bars and several annular stirrups. The longitudinal reinforcing bars are threaded through the inner ring of the annular stirrups, and the annular stirrups are evenly distributed along the length of the beam 1. The longitudinal reinforcing bars are connected to each annular stirrup by binding wire.
[0039] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, each of the four sides of the composite plate 2 is provided with a plurality of protrusions 21 at intervals. The protrusions 21 are integrally formed with the composite plate 2. The side of the protrusion 21 near the embedded steel bar 11 is on the same plane as one side of the beam 1. The protrusion 21 is a trapezoidal block, and the shortest distance between two adjacent protrusions 21 gradually decreases in the direction away from the composite plate 2. In other embodiments, the protrusion 21 is a rectangular block or a square block. A clearance groove 22 is formed between two adjacent protrusions 21. The clearance groove 22 is arranged vertically through the plate, and the shortest distance between two adjacent clearance grooves 22 is the same. The side of the protrusion 21 near the embedded steel bar 11 and the inner wall of the clearance groove 22 are both rough surfaces.
[0040] Combination Figure 2 , Figure 3 and Figure 4 As shown, each of the four sides of the composite slab 2 is provided with several reinforcing bars 23. The reinforcing bars 23 are located in the clearance grooves 22, and each reinforcing bar 23 corresponds to a clearance groove 22. The distance between two adjacent reinforcing bars 23 on the same side of the composite slab 2 is the same. Each pair of reinforcing bars 23 forms a group, and the two reinforcing bars 23 in the same group are located on two composite slabs 2 respectively. The two reinforcing bars 23 in each group correspond to each other, and the two reinforcing bars 23 are connected by connecting steel bars 3. The reinforcing bars 23 and the connecting steel bars 3 are tied together by tie wires 4.
[0041] Combination Figure 7 and Figure 8 As shown, a mold for manufacturing a composite board 2 includes four first templates 5, which are fixed to a mold table by a magnetic box with a pressure plate. Adjacent first templates 5 are vertically arranged, and the four first templates 5 form a receiving cavity 51. Several forming blocks 52 are spaced apart on the side of each first template 5 near the receiving cavity 51. The forming blocks 52 are integrally formed with the first template 5, and the distance between adjacent forming blocks 52 is equal. Each forming block 52 has a groove 521 on the side away from the first template 5 for the insertion of a reinforcing rib 23. The side of each first template 5 near the receiving cavity 51 and the outer surface of each forming block 52 are roughened. When the protrusion 21 is a trapezoidal block, the forming block 52 is also a trapezoidal block, and the groove 521 penetrates the lower surface of the forming block 52. During demolding, the first template 5 is moved upward so that the tendon 23 can be removed from the groove 521. When the protrusion 21 is a square block, the forming block 52 is also a square block, and the groove 521 can be a round hole. During demolding, the first template 5 is moved horizontally so that the tendon 23 can be removed from the groove 521.
[0042] The implementation principle of a connection node structure between a composite slab and a beam in this application embodiment is as follows:
[0043] By placing two reinforcing bars 23 in each group on both sides of the beam 1, direct contact between the reinforcing bars 23 and the embedded reinforcing bars 11 is avoided, thus preventing collision between the reinforcing bars 23 and the longitudinal reinforcing bars, reducing construction difficulty and labor costs. A second formwork is supported under each composite slab 2, and the second formwork covers each clearance groove 22, through which concrete is poured between the two composite slabs 2.
[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A connection joint structure of a laminated slab and beam, characterized by: The utility model provides a beam (1) and two laminated boards (2), the beam (1) is provided with embedded steel bars (11), the embedded steel bars (11) are located between two laminated boards (2), and the side of each laminated board (2) close to the embedded steel bars (11) is provided with a plurality of beard bars (23) at intervals, every two beard bars (23) are a group, and the opposite ends of two beard bars (23) in each group are located on the two sides of the beam (1) respectively, and the two beard bars (23) in the same group are located on two laminated boards (2) respectively, the two beard bars (23) in each group are one-to-one, and two beard bars (23) are connected through connecting steel bars (3).
2. The connection joint structure of the laminated slab and beam according to claim 1, characterized by: The side of the laminated board (2) close to the embedded steel bars (11) is provided with a plurality of convex blocks (21) at intervals, and a relief groove (22) is formed between two adjacent convex blocks (21), one beard bar (23) is arranged in the relief groove (22), and one end of the beard bar (23) close to the embedded steel bars (11) is located in the relief groove (22).
3. The connection node structure of a composite slab and beam according to claim 2, characterized by: The relief groove (22) is arranged in a through mode from top to bottom.
4. The connection joint structure of a laminated slab and beam according to claim 2, characterized by: The convex block (21) is a trapezoidal block, and the closest distance between two adjacent trapezoidal blocks gradually decreases in the direction away from the laminated board (2).
5. The connection joint structure of a laminated slab and beam according to claim 1, characterized by: The beard bar (23) and the connecting steel bar (3) are connected through tying wire (4).
6. The connection node structure of a composite slab and beam according to claim 2, characterized by: The closest distance between two adjacent relief grooves (22) is the same.
7. The connection node structure of a composite slab and beam according to claim 2, characterized by: The side of the convex block (21) close to the embedded steel bars (11) and the inner wall of the relief groove (22) are all rough surfaces.