Prefabricated slab dovetail joint splicing structure

Abstract

The utility model discloses a precast slab dovetail joint splicing structure which comprises a precast slab I, a precast slab II and dovetail joints, one side of the precast slab I and one side of the precast slab II are respectively provided with a connecting groove, a dovetail joint is arranged between every two adjacent connecting grooves, each dovetail joint is provided with an upper slab body and a lower slab body, and the upper slab body and the lower slab body are connected with each other. A second half cavity and a first half cavity are formed in the center of the bottom of the upper plate body and the center of the top of the lower plate body respectively, the second half cavity and the first half cavity are combined to form a cavity, and a reinforcing column is arranged in the cavity. Connecting grooves are formed in one side of a first prefabricated plate and one side of a second prefabricated plate, a dovetail joint is arranged between every two adjacent connecting grooves, an upper plate body and a lower plate body of each dovetail joint are combined through a second half cavity and a first half cavity to form a cavity, and a reinforcing column is arranged in each cavity. According to the design, the overall stability of the splicing structure is guaranteed, and the rigidity and the bearing capacity of the splicing parts are further improved through the existence of the reinforcing columns.

Description

Technical Field

[0001] This utility model relates to the field of precast panel splicing technology, specifically to a dovetail tenon splicing structure for precast panels. Background Technology

[0002] Precast concrete slab structures are increasingly used in many fields such as architecture, bridges, and furniture. Because precast slabs can be manufactured in a factory and then transported to the construction site for assembly, they offer advantages such as fast construction speed and controllable quality, playing a vital role in engineering construction.

[0003] However, existing precast panel splicing technologies have some obvious defects and shortcomings. First, in terms of connection strength, traditional precast panel splicing methods often fail to guarantee sufficient strength at the joints. Common connection methods may involve simple splicing or the use of a few connectors, which leads to cracking and loosening at the joints during long-term use, significantly affecting the structural safety and service life. For example, in some building structures, due to insufficient connection strength of the precast panels, the joints are prone to failure under the influence of external forces such as earthquakes and wind, thus endangering the safety of the entire building. Second, there are also problems with splicing accuracy and stability. Existing splicing structures cannot guarantee precise splicing between precast panels, resulting in limited overall structural rigidity and load-bearing capacity after splicing. The lack of effective splicing positioning and reinforcement measures makes it difficult for the precast panels to form a stable whole after splicing, which may lead to deformation under load, affecting the normal use of the structure. Utility Model Content

[0004] The purpose of this utility model is to provide a dovetail joint structure for prefabricated panels to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precast slab dovetail joint structure, comprising a precast slab one, a precast slab two, and a dovetail joint. Each of the precast slab one and precast slab two has a connecting groove on one side, and a dovetail joint is provided between two adjacent connecting grooves. The dovetail joint is provided with an upper plate and a lower plate. A semi-cavity two and a semi-cavity one are respectively provided at the center of the bottom of the upper plate and the center of the top of the lower plate. The semi-cavity two and semi-cavity one combine to form a cavity. A reinforcing column is provided inside the cavity. Holes and slots are provided on the lower plate at both ends of the semi-cavity one. A locking groove is provided at the middle position of the hole and slot. A locking block is provided at the bottom of the upper plate corresponding to the locking groove. A positioning pin is provided inside each hole and slot.

[0006] Preferably, limiting grooves are provided on both sides of the cavity, and protrusions are provided on both sides of the reinforcing column at the positions corresponding to the limiting grooves.

[0007] Preferably, the center of the snap-fit ​​block is provided with a hole for the positioning pin to pass through.

[0008] Preferably, the reinforcing column has holes at both ends for the locating pins to pass through.

[0009] Preferably, the cavity and the slot are arranged vertically.

[0010] Preferably, both ends of the dovetail tenon are provided with glue-applying grooves.

[0011] Preferably, the sum of the depths of the second and first cavities is equal to the thickness of the reinforcing column.

[0012] This utility model provides a dovetail joint structure for precast panels, which has significant advantages and positive effects compared with the prior art, specifically reflected in the following aspects:

[0013] 1. Improve splicing accuracy and stability:

[0014] Both precast slab one and precast slab two have connecting grooves on one side, and dovetail tenons are provided between adjacent connecting grooves. The upper and lower plates of the dovetail tenons are combined to form a cavity through half-cavity two and half-cavity one, and a reinforcing column is provided inside the cavity. This design not only ensures the overall stability of the spliced ​​structure, but also further improves the rigidity and load-bearing capacity of the spliced ​​parts through the presence of reinforcing columns.

[0015] The locating pins ensure the structural stability of the connection between the upper and lower plates.

[0016] 2. Enhance connection strength:

[0017] By setting glue-applying grooves at both ends of the dovetail tenon and filling these grooves with an adhesive that enhances connection strength, the adhesive is ensured to be evenly distributed and fully filled. During the splicing process, mechanical pressure activates the flow of the adhesive, which automatically cures after filling the gaps. This significantly enhances the connection strength between precast panels without increasing structural complexity. Compared to traditional splicing methods, this invention effectively prevents cracking and loosening at the joints, extending the service life of the structure.

[0018] 3. Simplified installation process:

[0019] The design of the snap-fit ​​blocks and slots simplifies and speeds up the assembly of precast panels. During installation, simply insert the snap-fit ​​block into the slot and secure it with the locating pin for a quick and strong connection. This not only improves construction efficiency but also reduces installation difficulty and labor costs.

[0020] 4. Optimize structural design:

[0021] The cavity is provided with limiting grooves on both sides, and the reinforcing column is provided with protrusions at the corresponding positions of the limiting grooves on both sides. This design not only ensures the stable position of the reinforcing column in the cavity, but also further improves the torsional resistance and seismic performance of the overall structure through the cooperation of the limiting grooves and protrusions.

[0022] The vertical arrangement between the cavity and the slot optimizes the force transmission path, allowing the structure to distribute stress more evenly when subjected to external forces, thus avoiding damage caused by local stress concentration.

[0023] 5. Environmental friendliness and economic efficiency:

[0024] By optimizing the structural design and material usage, this invention ensures high strength and stability while reducing material waste and lowering production costs. Furthermore, the design of the adhesive coating tank makes adhesive use more efficient, reducing waste and meeting environmental protection requirements.

[0025] 6. Wide applicability:

[0026] This invention is not only suitable for splicing precast panel structures, but can also be widely applied in other fields requiring high-strength connections, such as construction, bridges, and furniture. Its flexible design and excellent performance enable it to demonstrate good adaptability in various application scenarios.

[0027] In summary, this utility model, through ingenious structural design and material optimization, achieves a comprehensive improvement in connection strength, splicing accuracy, ease of installation, structural stability, and environmental friendliness and economy, solving problems such as insufficient connection strength, complex installation, and unstable structure in existing technologies. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a top view of the lower plate structure of this utility model;

[0030] Figure 3 This is a side view of the unfolded dovetail tenon structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the dovetail tenon closed side view structure of this utility model;

[0032] Figure 5 This is a bottom view of the upper plate structure of this utility model;

[0033] Figure 6 This is a schematic diagram of the reinforced column structure of this utility model;

[0034] Figure 7 This is a side view schematic diagram of the dovetail tenon structure of this utility model;

[0035] Figure 8 This is a schematic diagram of the connecting groove structure of this utility model.

[0036] In the diagram: 1. Precast slab one; 2. Dovetail tenon; 3. Upper slab; 4. Lower slab; 5. Glue application groove; 6. Positioning pin; 7. Hole groove; 8. Reinforcing column; 9. Snap-fit ​​groove; 10. Limiting groove; 11. Half cavity one; 12. Half cavity two; 13. Snap-fit ​​block; 14. Hole one; 15. Connecting groove; 16. Hole two; 17. Protrusion; 18. Cavity; 19. Precast slab two. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0038] Please see Figure 1-8 This utility model provides an embodiment of a precast panel dovetail joint structure, comprising a precast panel 1, a precast panel 2 19, and a dovetail tenon 2. A connecting groove 15 is provided on one side of both the precast panel 1 and the precast panel 2 19, and a dovetail tenon 2 is provided between two adjacent connecting grooves 15.

[0039] Both ends of the dovetail tenon 2 are provided with glue application grooves 5.

[0040] Both precast slab 1 and precast slab 2 are rectangular structures, and the materials can be concrete, composite materials or other high-strength materials.

[0041] Multiple connecting grooves 15 are evenly provided along the length direction on one side edge of precast slab 1 and precast slab 2 19.

[0042] The depth and width of the connecting groove 15 are designed according to the thickness and strength requirements of the precast slab.

[0043] The length direction of the connecting groove 15 is consistent with the length direction of the precast slab, ensuring that the connecting groove 15 can fit tightly with the dovetail tenon 2.

[0044] The dovetail tenon 2 is a trapezoidal cross-section structure, and its cross-section shape is like a dovetail, hence the name dovetail tenon.

[0045] The length of the dovetail tenon 2 is slightly less than the distance between two adjacent connecting slots 15 to ensure that there is a certain gap when inserted, which facilitates the application of glue.

[0046] The dovetail tenon 2 has glue-applying grooves 5 at both ends to hold the adhesive.

[0047] The adhesive groove 5 is the groove at both ends of the dovetail tenon 2. The groove depth and width are designed according to the amount of adhesive used and the bonding strength requirements.

[0048] The function of the glue-applying groove 5 is to evenly apply adhesive when the dovetail tenon 2 is inserted into the connecting groove 15, thereby enhancing the connection strength.

[0049] The dovetail tenon 2 is provided with an upper plate 3 and a lower plate 4. The center of the bottom of the upper plate 3 and the center of the top of the lower plate 4 are respectively provided with a second half cavity 12 and a first half cavity 11. The second half cavity 12 and the first half cavity 11 are combined to form a cavity 18. A reinforcing column 8 is provided inside the cavity 18.

[0050] The sum of the depths of semi-cavity 12 and semi-cavity 11 is equal to the thickness of reinforcing column 8.

[0051] The two ends of the reinforcing column 8 are provided with holes 16 for the positioning pin 6 to pass through.

[0052] Both sides of the cavity 18 are provided with limiting grooves 10, and both sides of the reinforcing column 8 are provided with protrusions 17 at the positions corresponding to the limiting grooves 10.

[0053] Cavity 18: When the upper plate 3 and the lower plate 4 are combined, half-cavity 12 and half-cavity 11 combine to form a complete cavity 18. The internal space of cavity 18 is used to accommodate the reinforcing column 8.

[0054] Reinforcing column 8: The reinforcing column 8 is placed inside the cavity 18, and its thickness T is equal to the sum of the depths of half cavity 2 12 and half cavity 11 (D1+D2), that is, T=D1+D2. This design ensures that the reinforcing column 8 can be tightly embedded in the cavity 18, enhancing the stability of the overall structure.

[0055] Hole 2 16: Each end of the reinforcing post 8 is provided with a hole 2 16 for the positioning pin 6 to pass through. The diameter of hole 2 16 matches the diameter of the positioning pin 6 to ensure that the positioning pin 6 can be smoothly inserted and fixed.

[0056] Limiting groove 10: A limiting groove 10 is provided on each side of the cavity 18. The depth and width of the limiting groove 10 are designed according to actual needs, and are mainly used to limit the lateral movement of the reinforcing column 8.

[0057] Protrusion 17: A protrusion 17 is provided on each side of the reinforcing column 8 at the position corresponding to the limiting groove 10. The size of the protrusion 17 matches the limiting groove 10. When the reinforcing column 8 is embedded in the cavity 18, the protrusion 17 is precisely engaged in the limiting groove 10, further enhancing the stability of the structure.

[0058] The lower plates 4 at both ends of the semi-cavity 11 are provided with slots 7, and the cavity 18 and the slots 7 are arranged perpendicularly.

[0059] A snap-fit ​​groove 9 is provided in the middle of the slot 7, and a snap-fit ​​block 13 is provided at the bottom of the upper plate 3 corresponding to the snap-fit ​​groove 9. A positioning pin 6 is provided inside each slot 7.

[0060] The center of the snap-fit ​​block 13 is provided with a hole 14 for the positioning pin 6 to pass through.

[0061] Each lower plate 4 has a slot 7, which is elongated and its length and width are designed according to the actual application requirements.

[0062] At the center of each slot 7, a snap-fit ​​groove 9 is provided. The depth and width of the snap-fit ​​groove 9 match the snap-fit ​​block 13 to ensure a secure snap-fit.

[0063] The function of the snap-fit ​​groove 9 is to fix the upper plate 3 and prevent it from shifting during use.

[0064] The upper plate 3 is located at the top of the semi-cavity structure 11, and a snap-fit ​​block 13 is provided at the bottom corresponding to the snap-fit ​​groove 9.

[0065] Each snap-fit ​​block 13 has a hole 14 at its center, which is used for the locating pin 6 to pass through.

[0066] Each slot 7 has a locating pin 6 inside. The locating pin 6 can be made of metal to ensure sufficient strength and wear resistance.

[0067] One end of the positioning pin 6 is fixed to the inner wall of the slot 7, and the other end extends out of the slot 7 to be inserted into the hole 14 of the upper plate 3.

[0068] When this application embodiment is used,

[0069] Precast slab preparation

[0070] According to the design requirements, concrete, composite materials, or other high-strength materials are selected to process precast slab one and precast slab two into cuboid structures. On one edge of precast slab one and precast slab two, multiple connecting grooves are evenly arranged along the length direction according to the designed groove depth, groove width, and spacing, with the length direction of the connecting grooves consistent with the length direction of the precast slab.

[0071] Dovetail joint construction

[0072] The dovetail tenon is machined into a trapezoidal cross-section, its length slightly less than the distance between two adjacent connecting slots. Adhesive grooves are made at both ends of the dovetail tenon, with the groove depth and width determined based on the amount of adhesive used and the required bonding strength. The dovetail tenon is divided into an upper plate and a lower plate. A second semi-cavity is machined at the center of the bottom of the upper plate, and a first semi-cavity is machined at the center of the top of the lower plate, ensuring the sum of the depths of the two semi-cavities meets design requirements for subsequent mating with the reinforcing post. On the lower plate, slots are machined at both ends of the first semi-cavity; these slots are elongated, with their length and width determined by actual application needs, and a locking groove is machined in the middle of the slots. A locking block is machined at the bottom of the upper plate corresponding to the locking groove, and a hole for a locating pin is machined at the center of the locking block. Machining a reinforcing post ensures its thickness is equal to the sum of the depths of half-cavity two and half-cavity one. Holes two for the locating pins to pass through are machined at both ends of the reinforcing post. Simultaneously, protrusions are machined on both sides of the reinforcing post at positions corresponding to the cavity limiting grooves. Limiting grooves are machined on both sides of the cavity; the depth and width of the limiting grooves are designed according to actual needs.

[0073] Preparations before splicing

[0074] Cleaning: Clean the surfaces of the connecting grooves and dovetail joints of the precast slabs (including the upper slab, lower slab, reinforcing columns, etc.) to remove oil, dust and other impurities, and ensure that the connecting parts are clean.

[0075] Adhesive preparation: Select a suitable adhesive, prepare enough adhesive according to the capacity of the glue tank, and ensure that the adhesive is in good working condition for use.

[0076] splicing stage

[0077] To install the reinforcing post, place it into the lower half-cavity of the lower plate, aligning the protrusions on both sides of the reinforcing post with the limiting grooves on both sides of the cavity. Slowly insert the reinforcing post until the protrusions are engaged in the limiting grooves, ensuring that the reinforcing post is stably positioned within the cavity.

[0078] Assemble the upper and lower plates by aligning the second half of the upper plate with the first half of the lower plate and the internal reinforcing column, so that the two are combined to form a complete cavity. At this time, the reinforcing column is tightly embedded in the cavity. Align the snap-fit ​​block at the bottom of the upper plate with the snap-fit ​​groove in the hole of the lower plate, and insert the snap-fit ​​block into the snap-fit ​​groove.

[0079] Insert the positioning pin and fix one end of the positioning pin to the inner wall of the slot. Then, pass the other end of the positioning pin through the slot of the lower plate, the holes at both ends of the reinforcing column, and the hole in the center of the upper plate locking block in sequence to ensure that the positioning pin is firmly inserted and that the upper plate and the lower plate are stably connected.

[0080] Apply adhesive evenly to the adhesive grooves at both ends of the dovetail tenon, ensuring that the adhesive is fully filled.

[0081] When splicing precast panels, dovetail tenons with adhesive applied are inserted between adjacent connecting grooves of precast panel one and precast panel two. Since the length of the dovetail tenon is slightly less than the distance between the connecting grooves, a certain gap is provided to facilitate the even distribution of adhesive. Appropriate mechanical pressure is applied to the precast panels to ensure that the dovetail tenons fit tightly against the connecting grooves, while simultaneously activating the flowability of the adhesive to fill the gaps.

[0082] Waiting for curing: After the splicing is completed, wait for the adhesive to cure automatically and form a strong connection. During this period, avoid applying any additional external force to the spliced ​​structure.

[0083] The above workflow covers the entire process of prefabricated dovetail joint structure from prefabrication to assembly, ensuring the strength, stability and accuracy of the joint structure.

[0084] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precast panel dovetail joint structure comprising a precast panel one (1), a precast panel two (19) and a dovetail (2), characterized in that: The precast slab one (1) and precast slab two (19) are provided with connecting slots (15) on one side, adjacent two connecting slots (15) are provided with dovetail (2), the dovetail (2) is provided with upper plate body (3) and lower plate body (4), and the center of the bottom of the upper plate body (3) and the center of the top of the lower plate body (4) are respectively provided with half cavity two (12) and half cavity one (11), the half cavity two (12) and half cavity one (11) are combined to form a cavity (18), the cavity (18) is provided with a reinforcing column (8) inside, the lower plate body (4) at both ends of the half cavity one (11) is provided with a hole slot (7), the hole slot (7) is provided with a clamping groove (9) at the middle position, the bottom of the upper plate body (3) is provided with a clamping block (13) at the position corresponding to the clamping groove (9), and the inside of each hole slot (7) is provided with a positioning pin (6).

2. A precast panel dovetail joint structure according to claim 1, wherein: The two sides of the cavity (18) are provided with limiting grooves (10), and the two sides of the reinforcing column (8) are provided with protrusions (17) at positions corresponding to the limiting grooves (10).

3. A precast panel dovetail joint structure according to claim 1, wherein: The center of the clamping block (13) is provided with a hole one (14) for the positioning pin (6) to penetrate.

4. A precast panel dovetail joint structure according to claim 1, wherein: The two ends of the reinforcing column (8) are provided with hole two (16) for the positioning pin (6) to penetrate.

5. A precast panel dovetail joint structure as defined in claim 1, wherein: The cavity (18) and the hole slot (7) are vertically arranged.

6. A precast panel dovetail joint structure as defined in claim 1, wherein: The two ends of the dovetail (2) are provided with glue coating grooves (5).

7. A precast panel dovetail joint structure as defined in claim 1, wherein: The sum of the depths of the half cavity two (12) and the half cavity one (11) is equal to the thickness of the reinforcing column (8).

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