A prefabricated building composite floor

Abstract

This paper discloses a composite floor slab for prefabricated buildings, comprising several precast slabs, each with a lower protrusion at the left end and an upper protrusion at the right end, and waist-shaped recesses at the front and rear ends for engaging with fixing clips. The upper protrusion has an upper recessed hole and a right limiting hole, while the lower protrusion has a left limiting hole. When adjacent precast slabs are stacked, limiting posts pass through these holes sequentially for lateral fixation, and are connected longitudinally by fixing clips. The limiting posts have round heads and hexagonal bodies, adapted to the corresponding holes to prevent rotation. The surface of the precast slabs has fixing nail through-holes and fixing clips, filled with a grid-like steel reinforcement. The limiting posts and fixing clips are made of metal, and the contact surfaces of the upper and lower protrusions have anti-slip textures. This structure improves installation efficiency and connection strength, and is suitable for prefabricated buildings.

Description

Technical Field

[0001] This article relates to a composite floor slab for prefabricated buildings. Background Technology

[0002] In the field of modern construction, prefabricated buildings are widely used due to their significant advantages such as high construction efficiency and low cost. Among them, composite floor slabs are a key component of prefabricated buildings, and the connection performance of their prefabricated slabs directly affects the overall quality and construction efficiency of the building.

[0003] However, current mainstream precast slab connection methods for composite floor slabs still face numerous technical bottlenecks that urgently need to be addressed. In terms of lateral splicing, traditional processes rely heavily on steel reinforcement for structural fixing, but these structures generally suffer from insufficient positioning accuracy. Repeated on-site adjustments during installation are necessary, significantly increasing construction time and failing to meet the demands of rapid prefabricated building construction. Regarding longitudinal connections, existing technologies primarily rely on simple mortar bonding or snap-fit ​​connections. These methods are inadequate in terms of seismic performance and structural stability, especially under strong loads or earthquakes, where connection failure is a significant risk, severely impacting building safety.

[0004] Furthermore, the design flaws of the limiting structure cannot be ignored. Traditional circular limiting holes lack effective constraints on the rotation of the precast slab plane, which may lead to relative rotation of the precast slab after splicing, resulting in a decrease in the overall stiffness of the composite floor slab and affecting structural reliability. In conclusion, developing a composite floor slab structure that can improve installation efficiency and enhance connection strength has become a pressing technical challenge in the field of prefabricated buildings. Utility Model Content

[0005] This utility model aims to provide a composite floor slab for prefabricated buildings, effectively solving the problems of slow installation speed and easy loosening of existing structures after fixing. The specific solution is as follows:

[0006] A composite floor slab for prefabricated buildings includes several prefabricated slabs. The left end of each prefabricated slab is configured as a lower protrusion, and the right end of each prefabricated slab is configured as an upper protrusion. Both the front and rear ends of each prefabricated slab are provided with waist-shaped grooves, and fixing clips are engaged inside the waist-shaped grooves.

[0007] The upper protruding surface is provided with an upper countersunk hole and a right limiting hole, and the lower protruding surface is provided with a left limiting hole. When two adjacent precast plates are stacked, the limiting post passes through the upper countersunk hole and the right limiting hole of the first precast plate and the left limiting hole of the second precast plate in sequence.

[0008] Several precast slabs are spliced ​​together using connecting structures. Laterally adjacent slabs are connected by upper and lower protrusions, while longitudinally adjacent slabs are connected by fixing clips. The modular design of the longitudinal fixing clips and the waist-shaped sinkhole supports multi-directional synchronous splicing, shortening the construction cycle.

[0009] In order to improve the strength of the overall connection structure and give the structure a certain anti-rotation capability, the cross-sectional shape of the left limiting hole and the right limiting hole is hexagonal, and the cross-sectional shape of the upper countersunk hole is circular.

[0010] The limiting post includes a limiting post head and a limiting post body. The limiting post has a through hole in the middle. The cross-sectional shape of the limiting post head is a circle that matches the upper countersunk hole. The cross-sectional shape of the limiting post body is a hexagon that matches the left limiting hole and the right limiting hole. The diameter of the limiting post head is larger than the maximum diameter of the limiting post body.

[0011] The surface of the precast slab is provided with a number of fixing nail through holes. Preferably, a single precast slab has four fixing nail through holes symmetrically distributed. When the fixing clip is engaged between two adjacent precast slabs, the fixing nail passes through the fixing nail through hole and fixes the fixing clip.

[0012] Preferably, the precast slab has 10 left limiting holes and 10 right limiting holes.

[0013] To enhance the overall structural strength, the precast slabs are filled with reinforcing steel bars arranged in a grid pattern to improve load-bearing capacity. The limiting posts and fixing clips are all made of metal to ensure strength and durability.

[0014] To ensure a smooth surface after connection, the thickness of both the upper and lower protrusions is half the total thickness of the precast slab. The lower surface of the upper protrusion and the upper surface of the lower protrusion are both provided with anti-slip textures. This transverse concave-convex structure enables rapid positioning of the precast slab, reducing on-site adjustment time.

[0015] Beneficial effects:

[0016] The transverse concave-convex structure of this composite floor slab enables rapid positioning of the precast slab, significantly reducing on-site adjustment time. The modular design of the longitudinal fixing clips and waist-shaped grooves supports multi-directional synchronous splicing, significantly improving installation efficiency.

[0017] The hexagonal body of the limiting column is precisely matched with the limiting hole, which effectively constrains the rotation of the precast slab plane and improves the overall shear resistance. The dual locking mechanism of the fixing clip and the fixing nail significantly enhances the tensile strength of the longitudinal connection. Combined with the anti-slip texture of the concave and convex contact surface and the design of metal connectors, the reliability is comprehensively optimized in terms of positioning accuracy, connection strength and structural stability, so as to meet the needs of efficient construction and safe load-bearing of prefabricated buildings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a composite floor slab used in prefabricated buildings;

[0019] Figure 2 This is a schematic diagram of the connection between two longitudinally adjacent precast slabs;

[0020] Figure 3 It is a top view of a single precast slab;

[0021] Figure 4 It is a cross-sectional view of a single precast slab;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of a single precast slab;

[0023] Figure 6 This is a schematic diagram of the limit post;

[0024] Figure 7 This is a sectional view of the limiting post;

[0025] In the diagram: 1. Precast slab, 11. Lower protrusion, 12. Upper protrusion, 13. Waist-shaped recess, 14. Left limiting hole, 151. Upper recess, 152. Right limiting hole, 16. Fixing nail through hole, 2. Limiting post, 21. Limiting post body, 22. Limiting post head, 23. Middle through hole, 3. Fixing clip. Detailed Implementation

[0026] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0027] Example 1:

[0028] like Figure 1-7 As shown, a prefabricated composite floor slab for prefabricated buildings includes several prefabricated slabs 1. Each prefabricated slab 1 has a lower protrusion 11 at its left end, an upper protrusion 12 at its right end, and a waist-shaped recess 13 at its front and rear ends. A fixing clip 3 is engaged within the waist-shaped recess 13. The surface of the upper protrusion 12 has an upper recessed hole 151 and a right limiting hole 152, and the surface of the lower protrusion 11 has a left limiting hole 14. When adjacent prefabricated slabs 1 are stacked, a limiting post 2 passes through the upper recessed hole 151, the right limiting hole 152, and the left limiting hole 14 in sequence. Laterally adjacent prefabricated slabs 1 are connected by the convex-concave fit of the upper protrusion 12 and the lower protrusion 11, and longitudinally adjacent prefabricated slabs 1 are connected by the fixing clip 3.

[0029] The left limiting hole 14 and the right limiting hole 152 have hexagonal cross-sectional shapes, while the upper countersunk hole 151 has a circular cross-sectional shape. The limiting post 2 includes a limiting post head 22 and a limiting post body 21. A through hole 23 is provided in the middle of the limiting post 2. The limiting post head 22 has a circular cross-sectional shape that matches the upper countersunk hole 151, and the limiting post body 21 has a hexagonal cross-sectional shape that matches the left limiting hole 14 and the right limiting hole 152. The diameter of the limiting post head 22 is larger than the maximum diameter of the limiting post body 21. Installation sequence:

[0030] S1, Horizontal splicing:

[0031] Align and overlap the upper protrusion 12 of the first precast plate 1 with the lower protrusion 11 of the second precast plate 1, so that the upper countersunk hole 151, the right limiting hole 152 and the left limiting hole 14 are coaxial.

[0032] Insert the limiting post 2 from above, ensuring that the head 22 of the limiting post is embedded in the countersunk hole 151. The main body 21 passes through the right limiting hole 152 and the left limiting hole 14, and the lateral limiting is achieved by using the diameter difference of the head 22.

[0033] S2, Vertical splicing:

[0034] Insert a fixing clip 3 into the waist-shaped groove 13 of the adjacent precast slab 1, and adjust its position until the clip groove is completely fitted.

[0035] The fixing pin passes through the fixing pin through hole 16 and is driven into the reserved hole of the fixing clip 3. It is then fixed by connecting with expansion screws.

[0036] S3, Overall Fixation:

[0037] The limiting post 2 has a through hole 23 in the middle through which a bolt is inserted, and the bottom is tightened with a nut to form a secondary anti-loosening structure;

[0038] Inspect all joints to ensure there is no misalignment or looseness, and complete the installation of the composite floor slab.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A composite floor slab for fabricated construction, characterized by, It includes several precast slabs, the left end of which is configured as a lower protrusion and the right end of which is configured as an upper protrusion. Both the front and rear ends of the precast slabs are provided with waist-shaped grooves, and the inside of the waist-shaped grooves is fitted with fixing clips. The upper protruding surface is provided with an upper countersunk hole and a right limiting hole, and the lower protruding surface is provided with a left limiting hole. When two adjacent precast plates are stacked, the limiting post passes through the upper countersunk hole and the right limiting hole of the first precast plate and the left limiting hole of the second precast plate in sequence. Several precast slabs are spliced ​​together by a connecting structure. Two adjacent precast slabs in the horizontal direction are connected by upper and lower protrusions, and two adjacent precast slabs in the vertical direction are connected by fixing clips.

2. The assembled floor slab for building according to claim 1, characterized in that The cross-sectional shape of the left limiting hole and the right limiting hole is hexagonal, and the cross-sectional shape of the upper countersunk hole is circular. The limiting post includes a limiting post head and a limiting post body. The limiting post has a through hole in the middle. The cross-sectional shape of the limiting post head is a circle that matches the upper countersunk hole. The cross-sectional shape of the limiting post body is a hexagon that matches the left limiting hole and the right limiting hole. The diameter of the limiting post head is larger than the maximum diameter of the limiting post body.

3. The assembled floor slab for building according to claim 1, characterized in that The surface of the precast slab is provided with several fixing nail through holes. When the fixing clip is engaged between two adjacent precast slabs, the fixing nail passes through the fixing nail through holes and fixes and limits the fixing clip.

4. The assembled floor slab for use in a building according to claim 3, characterized in that Each precast slab has four symmetrically distributed through holes for fixing nails.

5. A composite floor slab for prefabricated buildings according to any one of claims 1-4, characterized in that... The precast slab has 10 left limiting holes and 10 right limiting holes.

6. The assembled floor slab for use in a building according to claim 5, characterized in that The precast slab is filled with steel reinforcement material, which is distributed in a grid pattern.

7. A composite floor slab for prefabricated buildings according to claim 5, characterized in that... The limiting post and fixing clip are both made of metal.

8. The assembled floor slab for use in a building according to claim 5, wherein The thickness of the upper and lower protrusions is half the total thickness of the precast slab. The lower surface of the upper protrusion and the upper surface of the lower protrusion are provided with anti-slip texture.

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