Prefabricated concrete laminated slab

Abstract

The prefabricated concrete laminated slab comprises a left laminated bottom plate and a right laminated bottom plate, and the opposite sides of the left laminated bottom plate and the right laminated bottom plate are fixedly connected with a dovetail clamping block and a dovetail concave block respectively. A plurality of left transverse steel bars and a plurality of right transverse steel bars are fixedly connected into the left overlapping bottom plate and the right overlapping bottom plate correspondingly, and a plurality of honeycomb frames are fixedly installed between the opposite sides of the left transverse steel bars and the opposite sides of the right transverse steel bars. The honeycomb frame, the left transverse reinforcing steel bar, the left web member reinforcing steel bar, the left vertical reinforcing steel bar and the like are matched for use, so that loads can be dispersed more uniformly through effective combination of the honeycomb type reinforcing steel bar frame and the web member reinforcing steel bars, and structural deformation or damage caused by overlarge local stress is avoided; and meanwhile, through reasonable configuration of the transverse and vertical steel bars, the laminated slab has higher bending resistance and shear resistance when being subjected to loads in all directions, and the overall bearing capacity is further improved.

Description

Technical Field

[0001] This utility model relates to the field of precast concrete composite slab technology, and in particular to a precast concrete composite slab. Background Technology

[0002] With the rapid development of the construction industry, precast concrete composite slabs, as an efficient and convenient building component, have been widely used in various construction projects. The advantages of precast concrete composite slabs lie in their ability to improve construction efficiency, shorten construction time, and provide high quality stability. To further improve the load-bearing capacity, seismic performance, and connection stability of composite slabs, researchers and engineers are constantly exploring new technical solutions and structural optimization methods.

[0003] A search revealed that application number 202421118815.5 discloses a precast concrete composite slab, relating to the technical field of precast concrete composite slabs. It includes a left composite slab mechanism, with a central connecting mechanism movably connected to one side of the left composite slab mechanism, and a right composite slab mechanism movably connected to one side of the central connecting mechanism. The left composite slab mechanism includes left concrete. This utility model provides a precast concrete composite slab where left main vertical bars and left secondary vertical bars are arranged vertically inside the left concrete, and the left main horizontal bars and left secondary horizontal bars are spatially defined and do not move within the left concrete. Simultaneously, the left main vertical bars and left vertical conduits are fixed in the middle of the left main horizontal bars and left secondary horizontal bars, resulting in higher overall rigidity of the left concrete. The left vertical conduits and left horizontal conduits pass through the interior of the left main horizontal bars and left secondary horizontal bars and are protected, preventing damage during concrete pouring.

[0004] While the above-mentioned solution can ensure the stability of the composite slab, the device requires a large amount of twisted steel bars, and the materials used to manufacture this structure are very time-consuming and labor-intensive. At the same time, although the structure can meet the structural strength requirements of the foundation, the connection parts are prone to loosening or local damage during extreme loads, vibrations, and long-term use, which will affect the stability of the overall structure. In addition, traditional connection methods usually rely on standardized steel bars or steel plates, which lack flexibility and adaptability and cannot fully utilize the potential for reuse of steel resources. Therefore, a precast concrete composite slab is proposed to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a precast concrete composite slab.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a precast concrete composite slab, including a left composite bottom plate and a right composite bottom plate, wherein dovetail blocks and dovetail recesses are fixedly connected to opposite sides of the left and right composite bottom plates respectively, and a number of left horizontal reinforcing bars and a number of right horizontal reinforcing bars are fixedly connected inside the left and right composite bottom plates respectively, and a number of honeycomb frames are fixedly installed between opposite sides of the left and right horizontal reinforcing bars, and a number of sets of left web reinforcing bars and right web reinforcing bars are fixedly connected to the top of the left and right horizontal reinforcing bars respectively, and a left vertical reinforcing bar and a right vertical reinforcing bar are fixedly connected to the top of each set of left web reinforcing bars and right web reinforcing bars respectively, and a connecting component is provided at the bottom of the left and right composite bottom plates.

[0007] The left and right composite base plates are composed of pre-cast concrete, forming the basic structure of the composite slab and supporting the overall shape and stability of the concrete. They are connected by dovetail blocks and recesses to achieve stable joints, ensuring the strength and stability of the overall structure. The honeycomb frame, with its honeycomb structure, is mainly used to enhance the structural stability of the composite slab, evenly distribute the load, and prevent structural deformation or damage caused by localized stress concentration. The honeycomb frame also increases the overall strength of the composite slab, giving it better bending and shear resistance. The web reinforcement connects the transverse and vertical reinforcement, increasing the bending stiffness of the composite slab and playing a role in bearing and distributing loads within the slab, reducing localized stress concentrations, and making the entire structure more uniform and robust.

[0008] As a further description of the above technical solution:

[0009] One side of the dovetail locking block engages with the interior of the dovetail recess.

[0010] The dovetail structure interlocking mechanism enables a firm connection between the left and right overlapping base plates. The cooperation between the dovetail locking block and the concave block ensures precise alignment of the two base plates, reducing construction errors, enhancing connection strength, and effectively resisting sliding and relative displacement under load.

[0011] As a further description of the above technical solution:

[0012] The connecting assembly includes two support plates that are movably placed at the bottom of the left and right stacked base plates, and the support plates have through holes inside.

[0013] The support plate is placed at the bottom of the left and right composite base plates to support and fix the cast-in-place concrete.

[0014] As a further description of the above technical solution:

[0015] The internal thread of the through hole penetrates a screw rod, and the outer wall of the screw rod is threaded with a fixing nut.

[0016] The support plate can be firmly fixed to the bottom of the composite plate by the threaded connection of the screw and nut, ensuring that the connecting components will not shift during construction.

[0017] As a further description of the above technical solution:

[0018] A connecting steel bar is fixedly connected to the top of the screw, and a transverse steel bar is fixedly connected to the top of the connecting steel bar.

[0019] The outer wall of the transverse reinforcing bar is movably placed on top of the left and right composite bottom plates.

[0020] As a further description of the above technical solution:

[0021] The honeycomb frame is made of steel reinforcement and has a honeycomb structure.

[0022] As a further description of the above technical solution:

[0023] The tops of the left and right composite base plates are filled with cast-in-place concrete.

[0024] Cast-in-place concrete is poured on top of the left and right composite bottom slabs to further enhance the overall strength, stiffness and durability of the composite slabs. The addition of cast-in-place concrete effectively improves the bending and shear resistance of the composite slabs and forms a more robust composite structure through its combination with steel reinforcement.

[0025] As a further description of the above technical solution:

[0026] The left horizontal and left vertical reinforcing bars are arranged in a staggered and intersecting manner, and the right horizontal and right vertical reinforcing bars are arranged in a staggered and intersecting manner.

[0027] 1. Compared with the prior art, the beneficial effects of this utility model include: by using the honeycomb frame, left horizontal steel bar, left web steel bar, left vertical steel bar and other structures in combination, the load can be distributed more evenly through the effective combination of honeycomb steel frame and web steel bar, avoiding structural deformation or damage caused by excessive local stress. It can also make the structure maintain good stability when encountering vibration or other uneven loads. At the same time, the reasonable configuration of horizontal and vertical steel bars makes the composite slab have stronger bending and shear resistance when subjected to loads in all directions, and the overall load-bearing capacity is further improved.

[0028] 2. Compared with the prior art, the beneficial effects of this utility model include: through the combined use of structures such as dovetail blocks, dovetail protrusions, support plates, and connecting components, a stable and efficient connection can be achieved between the left and right overlapping bottom plates through the precise matching of the dovetail blocks and concave blocks. The dovetail structure provides a self-locking characteristic, preventing the overlapping plates from shifting or loosening due to external forces during construction, thereby greatly improving the stability of the overall connection. At the same time, the use of scrap steel bars from the construction site for welding to form T-shaped bars not only helps to reduce construction costs but also realizes the recycling and reuse of resources, which is in line with the concept of environmental protection and sustainable development. Attached Figure Description

[0029] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0030] Figure 1 The schematic diagram shows a three-dimensional view of the overall structure of a precast concrete composite slab according to one embodiment of the present invention.

[0031] Figure 2 The schematic diagram shows a three-dimensional perspective view of the internal cross-sectional structure of a precast concrete composite slab according to one embodiment of the present invention.

[0032] Figure 3 The schematic diagram shows an exploded three-dimensional view of a precast concrete composite slab according to one embodiment of the present invention.

[0033] Figure 4 The schematic diagram shows a three-dimensional view of a connection component structure for a precast concrete composite slab according to one embodiment of the present invention.

[0034] Figure 5 The illustration shows a three-dimensional perspective view of a honeycomb frame structure of a precast concrete composite slab according to one embodiment of the present invention.

[0035] Numbered in the diagram: 1. Left composite base plate; 2. Right composite base plate; 3. Dovetail block; 4. Dovetail recess; 5. Left horizontal reinforcement; 6. Right horizontal reinforcement; 7. Honeycomb frame; 8. Left web reinforcement; 9. Right web reinforcement; 10. Left vertical reinforcement; 11. Right vertical reinforcement; 12. Support plate; 13. Through hole; 14. Screw; 15. Fixing nut; 16. Connecting reinforcement; 17. Horizontal reinforcement; 18. Cast-in-place concrete. Detailed Implementation

[0036] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0037] According to one embodiment of the present invention, in conjunction with Figure 1-5 As shown. A precast concrete composite slab includes a left composite base plate 1 and a right composite base plate 2. Dovetail blocks 3 and dovetail recesses 4 are fixedly connected to opposite sides of the left composite base plate 1 and the right composite base plate 2, respectively. A plurality of left horizontal reinforcing bars 5 and a plurality of right horizontal reinforcing bars 6 are fixedly connected inside the left composite base plate 1 and the right composite base plate 2, respectively. A plurality of honeycomb frames 7 are fixedly installed between opposite sides of the left horizontal reinforcing bars 5 and the right horizontal reinforcing bars 6. A plurality of sets of left web reinforcing bars are fixedly connected to the top of the left horizontal reinforcing bars 5 and the right horizontal reinforcing bars 6, respectively. The tops of the left and right web reinforcement bars 8 and 9 are respectively fixedly connected to the left vertical reinforcement bar 10 and the right vertical reinforcement bar 11. The bottoms of the left and right composite base plates 1 and 2 are jointly provided with connecting components. The left and right composite base plates 1 and 2 are composed of pre-cast concrete, forming the basic structure of the composite plate, supporting the overall shape and stability of the concrete. Stable joints are achieved through dovetail blocks 3 and recessed blocks, ensuring the strength and stability of the overall structure. (Honeycomb) Frame 7 has a honeycomb structure, mainly used to enhance the structural stability of the composite slab, evenly distribute the load, and prevent structural deformation or damage caused by local stress concentration. The honeycomb frame 7 also increases the overall strength of the composite slab, giving it better bending and shear resistance. The web reinforcement connects the transverse reinforcement 17 and the vertical reinforcement, increasing the bending stiffness of the composite slab. It plays a role in bearing and distributing the load inside the slab, reducing local stress concentration, and making the entire structure more uniform and robust. Through the combined use of the honeycomb frame 7, left transverse reinforcement 5, left web reinforcement 8, and left vertical reinforcement 10, the effective combination of the honeycomb steel frame and the web reinforcement can distribute the load more evenly, avoiding structural deformation or damage caused by excessive local stress. It can also maintain good stability when encountering vibration or other uneven loads. At the same time, the reasonable configuration of the transverse and vertical reinforcement makes the composite slab have stronger bending and shear resistance when subjected to loads in all directions, and the overall load-bearing capacity is further improved.

[0038] One side of the dovetail locking block 3 interlocks with the inside of the dovetail recess 4. Through the locking mechanism of the dovetail structure, a firm connection is achieved between the left overlapping base plate 1 and the right overlapping base plate 2. The cooperation between the dovetail locking block 3 and the recess allows the two base plates to be precisely aligned, reducing construction errors, enhancing connection strength, and effectively resisting sliding and relative displacement under load.

[0039] The connecting assembly includes two support plates 12 that are movably placed at the bottom of the left and right composite base plates 1 and 2. The support plates 12 have through holes 13 inside. The support plates 12 are placed at the bottom of the left and right composite base plates 1 and 2 to support and fix the cast-in-place concrete 18. The internal threads of the through holes 13 penetrate the screw rod 14. The outer wall of the screw rod 14 is threaded with a fixing nut 15. Through the threaded connection between the screw rod 14 and the nut, the support plates 12 can be firmly fixed to the bottom of the composite plates, ensuring that the connecting assembly will not shift during construction. The top of the screw rod 14 is fixedly connected with a connecting steel bar 16. The top of the connecting steel bar 16 is fixedly connected with a transverse steel bar 17. The outer wall of the transverse steel bar 17 is movably placed on the top of the left and right composite base plates 1 and 2.

[0040] The honeycomb frame 7 is made of steel reinforcement and has a honeycomb structure. Cast-in-place concrete 18 is poured on the top of the left composite base plate 1 and the right composite base plate 2. The addition of cast-in-place concrete 18 on the top of the left composite base plate 1 and the right composite base plate 2 further enhances the overall strength, rigidity and durability of the composite plate. The addition of cast-in-place concrete 18 effectively improves the bending and shear resistance of the composite plate, and forms a more robust composite structure through the combination with the steel reinforcement. The left horizontal steel reinforcement 5 and the left vertical steel reinforcement 10 are arranged in a staggered cross arrangement, and the right horizontal steel reinforcement 6 and the right vertical steel reinforcement 11 are arranged in a staggered cross arrangement.

[0041] The working principle of this embodiment is as follows: First, fix either the left composite base plate 1 or the right composite base plate 2. Then, use a crane to lift another composite plate. For example, if the left composite base plate 1 is fixed first, the worker can lift the right composite base plate 2. At this time, align the dovetail recess 4 on the right composite base plate 2 with the position of the dovetail locking block 3 on the left composite base plate 1. Then, control the crane to slowly lower it, so that the dovetail recess 4 engages with the dovetail protrusion, connecting the left composite base plate 1 and the right composite base plate 2. Then, the scrap steel bars on the construction site can be welded together to form a T-shaped rod composed of the horizontal steel bar 17 and the connecting steel bar 16. Then, weld the screw 14 to the bottom of the connecting steel bar 16. Then, pick up the horizontal steel bar 17 and lower it at an angle, so that it is positioned between the left vertical steel bar 10 and the right vertical steel bar 11 on the left composite base plate 1 and the right composite base plate 2. Then, let the connecting steel bar 16 pass through the dovetail locking blocks 3 between each pair. In the gap, the connecting steel bar 16 can be passed through the through hole 13 on the support plate 12, and then the fixing nut 15 can be tightened to the screw 14, so that the support plate 12 can be fixed in the gap between the left composite base plate 1 and the right composite base plate 2. Then, the concrete 18 can be poured on it. After the concrete has solidified, the fixing nut 15 can be loosened, and the support plate 12 can be removed. Finally, the excess screw 14 can be cut off with a cutting device, thus completing the fixing of the concrete composite plate. In use, the composite plate can effectively distribute the load and enhance the stable support force between the composite plates through the honeycomb frame 7 steel bar structure. It not only improves the bending and shear resistance of the composite plate, but also effectively avoids structural deformation or damage caused by local stress concentration. Furthermore, by connecting the honeycomb structure with the web reinforcement and horizontal and vertical reinforcement, the load-bearing capacity of the entire structure is further enhanced.

[0042] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A precast concrete composite slab, comprising a left composite bottom slab (1) and a right composite bottom slab (2), characterized in that, Dovetail blocks (3) and dovetail recesses (4) are fixedly connected to opposite sides of the left and right overlapping base plates (1 and 2 respectively. Several left horizontal reinforcing bars (5) and several right horizontal reinforcing bars (6) are fixedly connected inside the left and right overlapping base plates (1 and 2 respectively. Several honeycomb frames (7) are fixedly installed between opposite sides of the left and right horizontal reinforcing bars (5 and 6). Several sets of left web reinforcing bars (8) and right web reinforcing bars (9) are fixedly connected to the top of the left and right horizontal reinforcing bars (5 and 6 respectively. The top of each set of left and right web reinforcing bars (8 and 9) is fixedly connected to the left vertical reinforcing bar (10) and right vertical reinforcing bar (11 respectively. A connecting component is provided at the bottom of the left and right overlapping base plates (1 and 2).

2. The precast concrete composite slab according to claim 1, characterized in that, One side of the dovetail locking block (3) engages with the interior of the dovetail recess (4).

3. A precast concrete composite slab according to claim 1, characterized in that, The connecting assembly includes two support plates (12) that are movably placed at the bottom of the left overlapping base plate (1) and the right overlapping base plate (2), and the support plates (12) have through holes (13) inside.

4. A precast concrete composite slab according to claim 3, characterized in that, The internal thread of the through hole (13) penetrates the screw (14), and the outer wall of the screw (14) is threaded with a fixing nut (15).

5. A precast concrete composite slab according to claim 4, characterized in that, The top of the screw (14) is fixedly connected to a connecting steel bar (16), and the top of the connecting steel bar (16) is fixedly connected to a transverse steel bar (17).

6. A precast concrete composite slab according to claim 1, characterized in that, The honeycomb frame (7) is made of steel reinforcement and has a honeycomb structure.

7. A precast concrete composite slab according to claim 1, characterized in that, The top of the left composite base plate (1) and the right composite base plate (2) are filled with cast-in-place concrete (18).

8. A precast concrete composite slab according to claim 1, characterized in that, The left horizontal reinforcing bar (5) and the left vertical reinforcing bar (10) are arranged in a staggered and intersecting manner, and the right horizontal reinforcing bar (6) and the right vertical reinforcing bar (11) are arranged in a staggered and intersecting manner.

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