Prefabricated concrete composite floor slab

Abstract

The utility model relates to the technical field of concrete composite floor slabs, and discloses a prefabricated concrete composite floor slab which comprises a floor slab body, and a left protruding block and a right protruding block are fixedly installed on the left side and the right side of the floor slab body respectively. Connecting plates are evenly and fixedly installed on the right side of the floor body at equal intervals, and placing grooves are evenly formed in the left side of the floor body at equal intervals. And the connecting plates are matched with the corresponding placing grooves. When concrete is cast in place in the later period, cement can smoothly block a gap between the left protruding block and the right protruding block, the waterproof performance is guaranteed, cracking is avoided, and meanwhile obvious gaps formed in an existing close splicing method cannot be formed visually.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete composite floor slabs, in particular to a prefabricated concrete composite floor slab. Background Art

[0002] Composite slabs are assembled integral slabs made of prefabricated slabs and cast-in-place reinforced concrete layers. Composite slabs have good integrity, and the upper and lower surfaces of the slabs are flat, which is convenient for finishing layer decoration. They are suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity. In addition, the China Association for Engineering Construction Standardization has issued the "Technical Specifications for the Application of Reinforced Truss Concrete Composite Slabs", which proposes an integral close-joint connection method for composite slabs with two-way loads and a connection method without reinforcement for supports.

[0003] The existing patent document with publication number CN213979503U discloses a precast concrete composite floor slab with strong earthquake resistance, including a first slab, a second composite floor slab on one side of the first composite floor slab, a third composite floor slab arranged between the first composite floor slab and the second composite floor slab, a plurality of first steel bars are embedded and connected in the inner middle sides of the first composite floor slab, the second composite floor slab and the third composite floor slab, and both ends of the plurality of first steel bars extend to the outer sides of the first composite floor slab, the second composite floor slab and the third composite floor slab, and a plurality of second steel bars are embedded and connected in the inner top sides of the first composite floor slab and the second composite floor slab.

[0004] However, the above device has the following problems when used:

[0005] The traditional practice of pouring concrete through formwork supported by beard ribs has gradually been replaced by the practice of closely fitting unreinforced composite slabs together. However, this practice will form obvious gaps between the composite slabs, and these gaps are straight-through, so the waterproof and anti-cracking properties at the gaps cannot be guaranteed, affecting their subsequent use.

[0006] Therefore, we propose a precast concrete composite floor to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the problems existing in the prior art and proposes a precast concrete composite floor slab. When pouring concrete in situ at a later stage, cement can smoothly seal the gap between the left protruding block and the right protruding block, while ensuring waterproof performance and avoiding cracking, visually no obvious gap is formed as in the existing close-joined method.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A precast concrete composite floor slab comprises a floor slab body, and a left protruding block and a right protruding block are respectively fixedly installed on the left and right sides of the floor slab body;

[0010] The right side of the floor slab body is evenly and evenly fixed with connecting plates, and the left side of the floor slab body is evenly and evenly provided with placement grooves;

[0011] The connecting plate is matched with the corresponding placement groove.

[0012] Preferably, positioning holes are evenly and equidistantly provided on the floor body, and a positioning sleeve is inlaid and installed vertically directly below each positioning hole. Positioning bolts that are compatible with the positioning sleeves are movably installed on the floor body, and the positioning holes can be passed through by the positioning bolts, and through holes for the positioning bolts to pass through are provided on the connecting plate.

[0013] Preferably, both the right protruding block and the left protruding block are L-shaped, but are placed in different directions, and when the right protruding block and the left protruding block are against each other, in the cross section, the two can together form a rectangle with only one gap.

[0014] Preferably, two water-swellable strips are embedded and installed on the right protruding block and the left protruding block, and the two water-swellable strips are located on the vertical edges of the upper side and the lower side of the right protruding block and the left protruding block.

[0015] Preferably, the interior of the floor slab body is filled with steel bar trusses and longitudinal and transverse steel bar frames, and the steel bar trusses are partially exposed from the floor slab body.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) The utility model is provided with a floor slab body, a right protruding block and a left protruding block. When adjacent floor slab bodies come into contact, the left protruding blocks and the right protruding blocks of different floor slab bodies are in a state of abutting each other. Then, when concrete is cast in situ at a later stage, cement can smoothly seal the gap between the left protruding block and the right protruding block. While ensuring the waterproof performance and avoiding cracking, visually no obvious gap is formed as in the existing close-jointed method. Moreover, the gaps above and below the right protruding block and the left protruding block are not in a straight line. Even if water leaks accidentally, the water can be smoothly blocked by the horizontal gap, further ensuring the waterproof performance of the gaps between the floor slab bodies.

[0018] (2) The utility model is provided with a right protruding block, a left protruding block and a water-expanding strip. After installation, a proper amount of water can be sprayed on both sides of the floor slab body. On the one hand, the floor slab body can be maintained to ensure the effect of subsequent cast-in-place concrete. On the other hand, water can react with the two water-expanding strips to make the water-expanding strips expand, thereby completely blocking the gap between adjacent floor slab bodies, further ensuring the waterproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a prefabricated concrete composite floor slab proposed by the utility model;

[0020] Figure 2 A schematic diagram of the connection principle of adjacent floor slab bodies of a precast concrete composite floor slab proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the right protruding block and the left protruding block of a prefabricated concrete composite floor slab proposed by the utility model;

[0022] Figure 4 A schematic diagram of the location of a positioning sleeve for a precast concrete composite floor slab proposed by the utility model;

[0023] Figure 5 The utility model is a schematic diagram of the interior of a precast concrete composite floor slab body.

[0024] In the figure: 1. Floor slab body; 2. Steel bar truss; 3. Right protrusion block; 4. Left protrusion block; 5. Connecting plate; 6. Through hole; 7. Positioning bolt; 8. Positioning hole; 9. Water expansion strip; 10. Placement groove; 11. Positioning sleeve; 12. Vertical and horizontal steel bar frame. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] See also Figures 1 to 5 A precast concrete composite floor slab comprises a floor slab body 1, and a left protruding block 4 and a right protruding block 3 are respectively fixedly mounted on the left and right sides of the floor slab body 1;

[0027] When the close splicing step is performed, the adjacent floor slab bodies 1 are brought into contact with each other. At this time, the left protruding blocks 4 and the right protruding blocks 3 of different floor slab bodies 1 are in a state of abutting each other.

[0028] Then, when pouring concrete later, cement can smoothly seal the gap between the left protruding block 4 and the right protruding block 3, ensuring waterproof performance and avoiding cracking, while preventing visually obvious gaps that are present in existing close-fitting methods.

[0029] The right side of the floor slab body 1 is evenly and evenly fixed with connecting plates 5, and the left side of the floor slab body 1 is evenly and evenly provided with placement grooves 10;

[0030] When adjacent floor slab bodies 1 are placed, preliminary positioning activities between the floor slab bodies 1 can be performed by placing the connecting plates 5 in the corresponding inner parts of the placement grooves 10 .

[0031] The connecting plate 5 is matched with the corresponding placement groove 10 .

[0032] The floor body 1 is provided with positioning holes 8 at even intervals, and a positioning sleeve 11 is inlaid and installed vertically directly below each positioning hole 8. A positioning bolt 7 adapted to the positioning sleeve 11 is movably installed on the floor body 1, and the positioning holes 8 can be passed through by the positioning bolts 7, and a through hole 6 for the positioning bolts 7 to pass through is provided on the connecting plate 5.

[0033] Make the through hole 6 on the connecting plate 5 directly below the positioning hole 8, and then the positioning bolt 7 can smoothly pass through the two, and then the top of the positioning bolt 7 can smoothly contact the positioning sleeve 11, and then continue to rotate the positioning bolt 7 (which can be mechanical or manual) to make the positioning bolt 7 tightly inside the positioning sleeve 11, thereby completing the stable connection between the adjacent floor slab bodies 1.

[0034] The right protruding block 3 and the left protruding block 4 are both L-shaped, but are placed in different directions. When the right protruding block 3 and the left protruding block 4 are against each other, in the cross section, the two can together form a rectangle with only one gap.

[0035] This arrangement ensures that the gaps at the upper and lower parts of the right protruding block 3 and the left protruding block 4 are not in a straight line, and there is a horizontal gap in the middle. Even if water leaks accidentally, the water can be successfully blocked by the horizontal gap, which can effectively prevent water from leaking into the gap at the bottom, further ensuring the waterproof performance of the gap between the floor slab bodies 1.

[0036] Two water-swellable strips 9 are embedded and installed on both the right protruding block 3 and the left protruding block 4 , and the two water-swellable strips 9 are located on the vertical edges of the upper and lower sides of the right protruding block 3 and the left protruding block 4 .

[0037] After the installation is completed, an appropriate amount of water can be sprayed on both sides of the floor slab body 1. On the one hand, the floor slab body 1 can be maintained to ensure the subsequent cast-in-place concrete effect. On the other hand, the water can react with the two water-swelling strips 9 to make the water-swelling strips 9 expand, thereby completely blocking the gaps between adjacent floor slab bodies 1, further ensuring the waterproof effect.

[0038] The interior of the floor slab body 1 is filled with steel bar trusses 2 and longitudinal and transverse steel bar frames 12 , and a portion of the steel bar trusses 2 is exposed outside the floor slab body 1 .

[0039] The existence of the steel trusses 2 and the longitudinal and transverse steel frames 12 can ensure the strength of the floor slab body 1 .

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A precast concrete composite floor slab, comprising a floor slab body (1), characterized in that: A left protruding block (4) and a right protruding block (3) are respectively fixedly mounted on the left and right sides of the floor slab body (1); The right side of the floor slab body (1) is evenly and evenly fixed with connection plates (5), and the left side of the floor slab body (1) is evenly and evenly provided with placement grooves (10); The connecting plate (5) is matched with the corresponding placement groove (10).

2. A precast concrete composite floor slab according to claim 1, characterized in that: Positioning holes (8) are evenly and evenly provided on the floor slab body (1), a positioning sleeve (11) is inlaid and installed vertically directly below each positioning hole (8) on the floor slab body (1), a positioning bolt (7) adapted to the positioning sleeve (11) is movably installed on the floor slab body (1), the positioning holes (8) are for the positioning bolts (7) to pass through, and a through hole (6) is provided on the connecting plate (5) for the positioning bolts (7) to pass through.

3. A precast concrete composite floor slab according to claim 1 or 2, characterized in that: The right protruding block (3) and the left protruding block (4) are both L-shaped, but are placed in different directions. When the right protruding block (3) and the left protruding block (4) are against each other, in cross section, the two can together form a rectangle with only one gap.

4. A precast concrete composite floor slab according to claim 1 or 2, characterized in that: Two water-expandable strips (9) are inlaid and installed on the right protruding block (3) and the left protruding block (4), and the two water-expandable strips (9) are located on the vertical edges of the upper and lower sides of the right protruding block (3) and the left protruding block (4).

5. The precast concrete composite floor slab according to claim 3, characterized in that: Two water-expandable strips (9) are inlaid and installed on the right protruding block (3) and the left protruding block (4), and the two water-expandable strips (9) are located on the vertical edges of the upper and lower sides of the right protruding block (3) and the left protruding block (4).

6. A precast concrete composite floor slab according to claim 1, 2 or 5, characterized in that: The interior of the floor slab body (1) is filled with steel bar trusses (2) and longitudinal and transverse steel bar frames (12), and a portion of the steel bar trusses (2) is exposed outside the floor slab body (1).

7. The precast concrete composite floor slab according to claim 3, characterized in that: The interior of the floor slab body (1) is filled with steel bar trusses (2) and longitudinal and transverse steel bar frames (12), and a portion of the steel bar trusses (2) is exposed outside the floor slab body (1).

8. The precast concrete composite floor slab according to claim 4, characterized in that: The interior of the floor slab body (1) is filled with steel bar trusses (2) and longitudinal and transverse steel bar frames (12), and a portion of the steel bar trusses (2) is exposed outside the floor slab body (1).

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