Prefabricated composite floor slab bottom plate end steel bar connecting structure

Abstract

The utility model discloses a prefabricated composite floor slab bottom plate end steel bar connecting structure which comprises a prefabricated composite floor slab, prefabricated composite floor slab bottom steel bars, beam formworks arranged on the outer side of the periphery of the prefabricated composite floor slab and beam steel bars arranged in the beam formworks. Slope surfaces are arranged on the peripheral edges of the prefabricated composite floor slab, bottom reinforcing steel bars of the prefabricated composite floor slab are exposed out of the slope surfaces and are bent to form bent reinforcing steel bars, connecting pieces are arranged on the bent reinforcing steel bars at the slope surfaces of the prefabricated composite floor slab, one ends of the connecting pieces are fixedly connected with the bent reinforcing steel bars, and the other ends of the connecting pieces extend into beam formworks. On one hand, an existing prefabricated composite floor slab structure is improved, the slopes are arranged on the periphery of the prefabricated composite floor slab, and the horizontal steel bars are bent; on the other hand, the connecting pieces are inserted into the beam formwork and fixedly connected with the bent steel bars, then rapid lap joint is achieved, the construction progress is effectively accelerated, and the construction difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of building floor slab construction, specifically to a rebar connection structure at the end of the bottom slab of a precast composite floor slab. Background Technology

[0002] The connection between precast composite floor slabs and cast-in-place beams and slabs is usually achieved by extending the exposed horizontal steel bars around the perimeter of the precast composite floor slab into the beam formwork and casting them together with the beam steel bars to form an integral structure. However, because the beam steel bars in the beam formwork are crisscrossed, they can easily interfere with the position of the horizontal steel bars of the precast composite floor slab, causing installation difficulties. To address this, the beam steel bars are usually raised as a whole on the construction site, then the precast composite floor slab and horizontal steel bars are placed in place, and then the beam steel bars are lowered back into place. This method is relatively complex and requires hoisting equipment, which affects the construction progress. Therefore, this utility model proposes a novel steel bar connection structure between precast composite floor slabs and cast-in-place beams and slabs. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides a prefabricated composite floor slab bottom plate end steel bar connection structure with reasonable structural design.

[0004] The technical solution of this utility model is as follows:

[0005] A precast composite floor slab bottom end reinforcement connection structure includes a precast composite floor slab, bottom reinforcement bars of the precast composite floor slab, beam formwork set on the outer perimeter of the precast composite floor slab, and beam reinforcement bars set inside the beam formwork; the perimeter of the precast composite floor slab is set as a slope, the bottom reinforcement bars of the precast composite floor slab are exposed at the slope and bent to form bent reinforcement bars, and connectors are set on the bent reinforcement bars at the slope of the precast composite floor slab, one end of the connector is fixedly connected to the bent reinforcement bars, and the other end extends into the beam formwork.

[0006] Furthermore, the top of the bent reinforcing bar extends beyond the upper surface of the precast composite floor slab and into the cast-in-place layer, preferably extending into half the thickness of the cast-in-place layer.

[0007] Furthermore, the connector includes a connecting straight steel bar and a hanging steel bar. The connecting straight steel bar is perpendicular to and fixed to the bent steel bar. One end of the hanging steel bar extends into the beam formwork, and the other end is hung on the connecting straight steel bar and close to the bent steel bar. Preferably, the hanging steel bar is tied and fixed to the bent steel bar.

[0008] Furthermore, the connector includes a vertically bent reinforcing bar and a connecting sleeve. The vertically bent reinforcing bar includes a vertical section and an obliquely straight section. The connecting sleeve is disposed on the vertical section of the vertically bent reinforcing bar. The obliquely straight section of the vertically bent reinforcing bar extends into the beam formwork, and the vertical section is fitted onto the vertical section of the bent reinforcing bar through the connecting sleeve.

[0009] Furthermore, the connector includes a horizontally bent steel bar, which includes a horizontal straight section and an inclined straight section. The horizontal straight section rests on the upper surface of the precast composite floor slab, and the inclined straight section extends downward along the slope into the beam formwork. The horizontally bent steel bar is tied and fixed to the bent steel bar.

[0010] Furthermore, the angle between the inclined straight section and the horizontal straight section is equal to the slope angle of the precast composite floor slab.

[0011] Furthermore, the bottom reinforcing bars of the precast composite floor slab are bent at 90° on the slope to form right-angle bent reinforcing bars.

[0012] The beneficial effects of this utility model are as follows:

[0013] This invention improves existing precast composite floor slab structures by creating slopes around the perimeter of the precast composite floor slab and bending the horizontal reinforcing bars. Furthermore, it utilizes connectors inserted into the beam formwork and fixes the connectors to the bent reinforcing bars, thereby achieving rapid splicing, effectively improving construction progress and reducing construction difficulty. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall installation structure of Embodiment 1 of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of Embodiment 3 of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of this utility model;

[0019] In the diagram: 1. Precast composite floor slab; 2. Beam formwork; 3. Beam reinforcement; 4. Connector; 5. Bent reinforcement; 6. Horizontal reinforcement; 7. Connecting straight reinforcement; 8. Hanging reinforcement; 9. Connecting sleeve; 10. Vertical bent reinforcement; 11. Horizontal bent reinforcement. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0021] like Figure 1As shown, a precast composite floor slab bottom end reinforcement connection structure includes a precast composite floor slab 1, a beam formwork 2, beam reinforcement 3, and a connector 4. The precast composite floor slab 1 is surrounded by a beam formwork 2, the beam reinforcement 3 is placed inside the beam formwork 2, and the connector 4 is connected to the horizontal reinforcement of the precast composite floor slab 1 and extends into the beam formwork 2 to form a reinforcement connection structure between the precast composite floor slab and the cast-in-place beam slab.

[0022] The precast composite floor slab 1 uses factory-prefabricated components. The precast composite floor slab has a 10-45° slope around its perimeter, allowing the horizontal reinforcing bars within the precast composite floor slab 1 to extend beyond both ends. These extended portions are then bent upwards at a 90° angle to form bent reinforcing bars 5. Note: The vertical section of the bent reinforcing bars 5 should extend halfway into the cast-in-place layer above the precast composite floor slab 1. Figure 1 The middle cast-in-place layer has not been constructed.

[0023] In this embodiment: the connector 4 is composed of connecting straight steel bars 7 and hanging steel bars 8. The connecting straight steel bars 7 are set at the four sides of the precast composite floor slab 1 and are vertically welded and fixed to the middle of the bent steel bars 5. One end of the hanging steel bar 8 is provided with a hook structure, which can be directly hung on the connecting straight steel bars 7. The position of the hanging steel bar 8 is close to the bent steel bars 5 (that is, the hanging steel bars 8 and the bent steel bars 5 correspond one-to-one). Example 2

[0024] Unlike Embodiment 1, the connector 4 includes a vertically bent steel bar 10 and a connecting sleeve 9. The vertically bent steel bar 10 is formed by bending a vertical steel bar to the left, and includes a straight section and a vertical section. The connecting sleeve is set on the vertical section. The straight section of the vertically bent steel bar 10 extends into the beam formwork, and the vertical section is connected to the vertical section of the bent steel bar 5 by sleeve. Example 3

[0025] Unlike Embodiment 1, the connector 4 uses a horizontally bent steel bar 11, which is formed by bending a horizontal straight steel bar downwards. It includes an inclined straight section and a horizontal straight section. The horizontal straight section rests on the upper plane (upper surface) of the precast composite floor slab 1. The inclined straight section maintains the same inclination angle as the slope and extends downwards into the beam formwork. The inclined straight section is tied to the bent steel bar 5 with steel wire near the bent steel bar 5 to prevent the horizontally bent steel bar 11 from falling off. Example 4

[0026] Unlike Example 3, the precast composite floor slab 1 is cut to the bottom at an angle (increasing the slope angle), and the angle between the inclined straight section and the horizontal straight section of the horizontal bent steel bar 11 becomes smaller. At the same time, the connecting straight steel bar 7 in Example 1 can be set to overlap the horizontal bent steel bar 11 with the connecting straight steel bar 7.

[0027] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A precast composite floor slab bottom end reinforcement connection structure, comprising a precast composite floor slab, bottom reinforcement bars of the precast composite floor slab, beam formwork disposed on the outer perimeter of the precast composite floor slab, and beam reinforcement bars disposed within the beam formwork; characterized in that, The four sides of the precast composite floor slab are set as slopes. The bottom steel bars of the precast composite floor slab are exposed at the slope and bent to form bent steel bars. Connectors are set on the bent steel bars at the slope of the precast composite floor slab. One end of the connector is fixedly connected to the bent steel bar, and the other end extends into the beam formwork.

2. The precast composite floor slab bottom end reinforcement connection structure according to claim 1, characterized in that, The top of the bent steel bar extends beyond the upper surface of the precast composite floor slab and into the cast-in-place layer above the precast composite floor slab.

3. The precast composite floor slab bottom plate end reinforcement connection structure according to claim 1, characterized in that, The connector includes a connecting straight steel bar and a hanging steel bar. The connecting straight steel bar is set perpendicularly to and fixed to the bent steel bar. One end of the hanging steel bar extends into the beam formwork, and the other end is hung on the connecting straight steel bar and close to the bent steel bar.

4. The precast composite floor slab bottom end reinforcement connection structure according to claim 1, characterized in that, The connector includes a vertically bent steel bar and a connecting sleeve. The vertically bent steel bar includes a vertical section and an obliquely straight section. The connecting sleeve is disposed on the vertical section of the vertically bent steel bar. The obliquely straight section of the vertically bent steel bar extends into the beam formwork, and the vertical section is fitted onto the vertical section of the bent steel bar through the connecting sleeve.

5. The precast composite floor slab bottom end reinforcement connection structure according to claim 1, characterized in that, The connector includes a horizontally bent steel bar, which includes a horizontal straight section and an inclined straight section. The horizontal straight section rests on the upper surface of the precast composite floor slab, and the inclined straight section extends downward along the slope into the beam formwork. The horizontally bent steel bar is tied and fixed to the bent steel bar.

6. The precast composite floor slab bottom plate end reinforcement connection structure according to claim 5, characterized in that, The angle between the inclined straight section and the horizontal straight section is equal to the slope angle of the precast composite floor slab.

7. The precast composite floor slab bottom plate end reinforcement connection structure according to claim 1, characterized in that, The bottom reinforcing bars of the precast composite floor slab are bent at 90° on the slope.

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