Prefabricated large-span composite floor slab

Abstract

The utility model relates to the technical field of composite floor slabs, in particular to a prefabricated large-span composite floor slab which comprises a prefabricated slab, a longitudinal steel bar truss, a pouring layer and angle steel. The two sides of the prefabricated plate are each provided with a side plate in the length direction of the prefabricated plate, and the side plates on the two sides are slidably connected with the clamping plate A and the clamping plate B correspondingly. The longitudinal steel bar trusses are integrally connected with the prefabricated plate, and a plurality of foam plates are arranged in gaps of the longitudinal steel bar trusses on the prefabricated plate. The pouring layer covers the longitudinal steel bar trusses and the foam plates and is connected with the prefabricated plates. The angle steel is connected with the prefabricated plate and the pouring layer, and a cavity is formed between the angle steel and the prefabricated plate. According to the composite floor slab, the side plates are arranged, the clamping plates A and the clamping plates B are arranged in the side plates, a gap between every two adjacent composite floor slabs can be sealed conveniently, the angle steel is arranged, on one hand, the anti-pressure capacity of the composite floor slabs can be improved through the angle steel, and on the other hand, the total weight of a pouring layer can be reduced through a cavity formed by the angle steel.

Description

Technical Field

[0001] This utility model relates to the field of composite floor slab technology, and in particular to a prefabricated large-span composite floor slab. Background Technology

[0002] Composite floor slabs are assembled monolithic floor slabs made by stacking precast slabs and cast-in-place reinforced concrete layers. Composite floor slabs have good overall integrity, and the upper and lower surfaces of the slab are flat, which facilitates the finishing layer decoration. They are suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity. However, the total weight of existing precast large-span composite floor slabs is very large.

[0003] In the technical solution disclosed in Chinese Patent No. CN211114316U, the internal steel of the device is thickened and reinforced, the casting layer is thickened, there are many longitudinal and transverse reinforcing ribs, the hollow part of the floor slab is made of porous polystyrene foam, the truss is welded and the spacing of the truss is small.

[0004] However, the device still has shortcomings: during actual construction, there are sometimes large gaps between two adjacent composite floor slabs because operation space needs to be reserved. At this time, it is necessary to use a cover plate to seal them, and the operation of removing and placing the cover plate is relatively troublesome. Utility Model Content

[0005] The purpose of this utility model is to address the problems existing in the background technology by proposing a prefabricated large-span composite floor slab.

[0006] The technical solution of this utility model is: a prefabricated large-span composite floor slab, including a prefabricated slab, with a side plate provided on each side of the prefabricated slab along its length direction, and the two side plates are slidably connected to a clamping plate A and a clamping plate B respectively.

[0007] Longitudinal steel trusses are integrally connected to the precast slab, and several foam boards are placed between the gaps of the longitudinal steel trusses on the precast slab.

[0008] The pouring layer is wrapped around the longitudinal steel truss and foam board and connected to the precast slab.

[0009] And angle steel, several angle steels are connected to the precast slab and the cast layer, and a cavity is set between the angle steel and the precast slab.

[0010] Preferably, two limiting grooves are symmetrically arranged on both sides of the precast slab along its length direction, and a side strip is provided on the side plate. The side strip is located in the limiting groove and is attached to its inner wall, and several anti-slip limiting blocks are provided on the side strip.

[0011] Preferably, both side plates are provided with sliding grooves, and each side plate has several through holes communicating with the sliding grooves. A locking plate A is located within the sliding groove of one side plate and is slidably connected to its inner wall. The locking plate A has several lever plates A, each lever plate A located within a corresponding through hole and slidably connected to it. A locking plate B is located within the sliding groove of the other side plate and is slidably connected to its inner wall. The locking plate B has several lever plates B, each lever plate B located within a corresponding through hole and slidably connected to its inner wall.

[0012] Preferably, a protrusion is provided at the end of card plate A away from card plate B, and a groove is provided at the end of card plate B away from card plate A, with the groove matching the protrusion.

[0013] Preferably, the width of both card plate A and card plate B is not greater than the width of the corresponding groove.

[0014] Preferably, the longitudinal steel truss is provided with several transverse reinforcing bars that are integrally connected, and the cast layer covers the transverse reinforcing bars.

[0015] Preferably, the surface of the angle steel is provided with an anti-corrosion layer, and the angle steel is parallel to the side plate, with the angle steels spaced apart along the width direction of the precast slab.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] By setting side plates, and installing clamping plates A and B on the side plates, clamping plates A and B are mutually compatible for easy assembly; the clamping plates are used to close the gap between two adjacent composite floor slabs, and clamping plates A and B can also reduce the weight of the precast slabs and lower their cost; by setting foam boards, the total weight of the cast-in-place layer is reduced while increasing thermal insulation performance. In addition, this utility model also includes angle steel, the structure of which can increase the compressive strength of the entire composite floor slab in its length direction, and the cavity formed between the angle steel and the precast slab can further reduce the total weight of the cast-in-place layer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure of each component on the precast slab;

[0020] Figure 3 This is a schematic diagram of the connection structure between the side plate and the card plate A;

[0021] Figure 4 This is a schematic diagram of the connection structure between the side plate and the card plate B.

[0022] Reference numerals: 1. Precast slab; 101. Limiting groove; 2. Side plate; 201. Side strip; 202. Anti-slip limiting block; 203. Slide groove; 204. Through hole; 3. Clamping plate A; 31. Pushing plate A; 4. Clamping plate B; 41. Pushing plate B; 5. Longitudinal steel truss; 6. Transverse reinforcing bar; 7. Cast-in-place layer; 8. Foam board; 9. Angle steel; 901. Cavity. Detailed Implementation

[0023] Example 1

[0024] like Figures 1-4 As shown, this utility model proposes a precast large-span composite floor slab, including a precast slab 1, a longitudinal steel truss 5, a cast-in-place layer 7, and angle steel 9. A side plate 2 is provided on each side of the precast slab 1 along its length, and the side plates 2 are slidably connected to a retaining plate A3 and a retaining plate B4, respectively. Two limiting grooves 101 are symmetrically arranged on both sides of the precast slab 1 along its length. A side strip 201 is provided on the side plate 2, located within the limiting groove 101 and fitting against its inner wall, and several anti-slip limiting blocks 202 are provided on the side strip 201. A sliding groove 203 is provided on each side plate 2, and several through holes 204 communicating with the sliding groove 203 are provided on each side plate 2. The retaining plate A3 is located within the sliding groove 203 of one of the side plates 2 and slidably connected to its inner wall. Several lever plates A31 are provided on the retaining plate A3, each lever plate A31 located within the corresponding through hole 204 and slidably connected to it. The card plate B4 is located within the groove 203 of another side plate 2 and is slidably connected to its inner wall. Several lever plates B41 are provided on the card plate B4, each lever plate B41 being located within a corresponding through hole 204 and slidably connected to its inner wall. The width of both plate A3 and card plate B4 is no greater than the width of the corresponding groove 203. The longitudinal steel truss 5 is integrally connected to the precast slab 1, and several foam boards 8 are placed on the precast slab 1 between the gaps of the longitudinal steel truss 5. Several transverse reinforcing ribs 6 are integrally connected to the longitudinal steel truss 5. The cast-in-place layer 7 covers the longitudinal steel truss 5, the transverse reinforcing ribs 6, and the foam boards 8 and is connected to the precast slab 1. Several angle steels 9 connect the precast slab 1 and the cast-in-place layer 7, and a cavity 901 is provided between the angle steels 9 and the precast slab 1. The surface of the angle steels 9 is provided with an anti-corrosion layer, and the angle steels 9 are parallel to the side plate 2, with the angle steels 9 spaced apart along the width direction of the precast slab 1.

[0025] In this embodiment, firstly, the side plate 2 is set tightly against the templates on both sides inside the template. Then, concrete is poured according to the procedure until the concrete surface is flush with the surface of the side plate 2, thus forming the precast slab 1. Longitudinal steel trusses 5 and transverse reinforcing bars 6 are arranged on the precast slab, and foam boards 8 and angle steel 9 are arranged. After the precast slab 1 is hoisted into place, the clamping plates A3 and B4 on the two adjacent side plates 2 are slid to make them interlock, so as to close the gap between the two adjacent precast slabs 1. Then, concrete is poured. At this time, an independent cavity 901 is formed between the angle steel 9 and the precast slab 1. The cavity 901 is used to perform heat preservation and weight reduction.

[0026] Example 2

[0027] like Figure 3 and Figure 4 As shown, the present invention proposes a prefabricated large-span composite floor slab. Compared with embodiment one, the end of card plate A3 away from card plate B4 is provided with a protrusion, and the end of card plate B4 away from card plate A3 is provided with a groove. The groove is adapted to the protrusion, and a magnetic strip is provided on the protrusion. An iron plate is provided on the inner wall of the groove, and the magnetic strip is attracted to the iron plate.

[0028] In this embodiment, the protrusion is inserted into the groove, and the magnetic strip and the iron plate are used to lock the two plates together, thereby improving the tightness between the adjacent plates A3 and B4.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A precast large-span composite floor slab, characterized in that, include A precast slab (1) is provided on both sides of the precast slab (1) along its length direction, and the two side plates (2) are slidably connected to the clamping plate A (3) and the clamping plate B (4) respectively. Longitudinal steel truss (5), the longitudinal steel truss (5) is integrally connected with the precast slab (1), and several foam boards (8) are set on the precast slab (1) between the gaps of the longitudinal steel truss (5); The casting layer (7) is wrapped around the longitudinal steel truss (5) and the foam board (8) and connected to the precast slab (1); And angle steel (9), several angle steels (9) are connected to the precast slab (1) and the cast layer (7), and a cavity (901) is provided between the angle steel (9) and the precast slab (1).

2. The precast large-span composite floor slab according to claim 1, characterized in that, Two limiting grooves (101) are symmetrically arranged on both sides of the precast slab (1) along its length direction. A side strip (201) is provided on the side plate (2). The side strip (201) is located in the limiting groove (101) and is attached to its inner wall. Several anti-slip limiting blocks (202) are provided on the side strip (201).

3. A precast large-span composite floor slab according to claim 2, characterized in that, Both side plates (2) are provided with sliding grooves (203), and both side plates (2) are provided with several through holes (204) communicating with the sliding grooves (203); the card plate A (3) is located in the sliding groove (203) of one of the side plates (2) and is slidably connected to its inner wall. Several levers A (31) are provided on the card plate A (3), and each lever A (31) is located in the through hole (204) on the corresponding side and is slidably connected to it; the card plate B (4) is located in the sliding groove (203) of the other side plate (2) and is slidably connected to its inner wall. Several levers B (41) are provided on the card plate B (4), and each lever B (41) is located in the through hole (204) on the corresponding side and is slidably connected to its inner wall.

4. A precast large-span composite floor slab according to claim 3, characterized in that, A protrusion is provided at the end of card plate A (3) away from card plate B (4), and a groove is provided at the end of card plate B (4) away from card plate A (3), with the groove matching the protrusion.

5. A precast large-span composite floor slab according to claim 4, characterized in that, The widths of both plate A (3) and plate B (4) are not greater than the width of the corresponding groove (203).

6. A precast large-span composite floor slab according to claim 1, characterized in that, Several transverse reinforcing bars (6) are provided on the longitudinal steel truss (5) and are integrally connected. The cast layer (7) covers the transverse reinforcing bars (6).

7. A precast large-span composite floor slab according to claim 1, characterized in that, An anti-corrosion layer is provided on the surface of the angle steel (9), and the angle steel (9) is parallel to the side plate (2). The angle steel (9) is distributed at intervals along the width direction of the precast plate (1).

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