Novel prefabricated slab connecting structure

Abstract

The utility model belongs to the field of building prefabricated slabs, and particularly relates to a novel prefabricated slab connecting structure which comprises at least two prefabricated slabs, notches are formed inwards in the side direction of the prefabricated slabs, embedded steel bars are arranged in the prefabricated slabs and extend out of the prefabricated slabs, the ends of the embedded steel bars are located in the notches, and the number of the prefabricated slabs is at least two. The notches of the two prefabricated slabs are opposite to each other; the structure further comprises a prefabricated steel reinforcement cage, the two ends of the prefabricated steel reinforcement cage are connected with the ends of the embedded steel bars of the two prefabricated plates in a sleeved mode respectively, by prefabricating the steel reinforcement cage in advance, when the two plates are fixed on site, connection can be completed only by arranging the prefabricated steel reinforcement cage on the embedded steel bars in a sleeved mode and aligning the two plates, and steel bar binding on site is not needed any more.

Description

Technical Field

[0001] The utility model belongs to the field of building precast slabs, and particularly relates to a novel precast slab connection structure. Background Art

[0002] At present, under the background of the country's strong promotion of ultra-low energy consumption buildings, the prefabricated structure has been vigorously promoted.

[0003] In the prior art, before pouring between precast slabs, to ensure the connection reliability, generally, steel bar trusses are tied on-site between two slabs, or when producing precast slabs, some steel bar structures are embedded, and the two parts of steel bar trusses are further tied on-site to be connected as a whole, such as CN202010108794.9, CN202123365214.3, etc. However, no matter which of the above methods is used, on-site tying work is required, which is time-consuming and laborious. Summary of the Utility Model

[0004] To solve the problem that steel bars need to be tied on-site before pouring precast slabs, the utility model provides a novel precast slab connection structure.

[0005] The purpose of the utility model is achieved in the following way: a novel precast slab connection structure, including a precast slab 1, a notch 11 is formed inside the side direction of the precast slab 1, a pre-embedded steel bar 2 is arranged inside the precast slab 1, the pre-embedded steel bar 2 extends out of the precast slab 1 and the end of the pre-embedded steel bar 2 is located inside the notch 11, there are at least two precast slabs 1, and the notches 11 of the two precast slabs 1 are arranged oppositely;

[0006] It further includes a precast steel bar cage 3, and the two ends of the precast steel bar cage 3 are respectively sleeved with the end parts of the pre-embedded steel bars 2 of the two precast slabs 1.

[0007] Furthermore, the precast steel bar cage 3 includes four mutually parallel horizontal bars 31, a plurality of U-shaped steel bars 32 are arranged at intervals along the length direction of the horizontal bars 31, each U-shaped steel bar 32 is fixedly connected with the four horizontal bars 31, and the four horizontal bars 31 are covered inside the U-shaped structure of the U-shaped steel bar 32.

[0008] As a scheme, among the four horizontal bars 31, the distance between every two adjacent horizontal bars 31 is less than the diameter of the pre-embedded steel bar 2.

[0009] As a scheme, when the precast steel bar cage 3 is sleeved on the pre-embedded steel bar 2, all the four horizontal bars 31 are in contact with the pre-embedded steel bar 2.

[0010] Furthermore, the precast steel bar cage 3 and the pre-embedded steel bar 2 are in interference fit.

[0011] Compared with the prior art, the utility model prefabricates the steel reinforcement cage in advance. When fixing between two plates on site, only the prefabricated steel reinforcement cage needs to be sleeved on the embedded steel bars and the two plates are aligned to complete the connection, and there is no need to bind steel bars on site. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the precast slab connection structure;

[0013] Figure 2 is Figure 1 an enlarged view of the joint of two plates;

[0014] Figure 3 is a three-dimensional view of the joint of two plates;

[0015] Figure 4 is a side sectional view of the notch;

[0016] Figure 5 is a top view of the prefabricated steel reinforcement cage;

[0017] Figure 6 is Figure 5 the sectional view taken along line B-B of

[0018] Among them, there are precast slab 1, notch 11, embedded steel bar 2, prefabricated steel reinforcement cage 3, cross bar 31, and U-shaped steel bar 32. Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] In the present utility model, unless otherwise clearly defined and limited, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.

[0021] As shown in the attached Figures 1-4As shown in the figure, a new type of precast slab connection structure includes a precast slab 1. An opening 11 is formed inside the side of the precast slab 1. Embedded steel bars 2 are arranged inside the precast slab 1. The embedded steel bars 2 extend out from the precast slab 1 and the ends of the embedded steel bars 2 are located inside the opening 11. Preferably, the embedded steel bars 2 do not exceed the side of the precast slab 1. There are at least two precast slabs 1. The openings 11 of the two precast slabs 1 are arranged opposite to each other, and the embedded steel bars 2 are also arranged opposite to each other;

[0022] It further includes a precast steel cage 3. The two ends of the precast steel cage 3 are respectively sleeved on the ends of the embedded steel bars 2 of the two precast slabs 1.

[0023] The precast steel cage 3 is like the steel cage in the prior art, including multiple transverse bars 31. A plurality of hoop steel bars are arranged at intervals along the length direction of the transverse bars 31. However, its disadvantage is that the structure is fixed and it is difficult to make on-site adjustments when it does not match the size of the embedded steel bars 2.

[0024] Therefore, preferably, as Figures 5-6 shown in the figure, the precast steel cage 3 includes four mutually parallel transverse bars 31. A plurality of U-shaped steel bars 32 are arranged at intervals along the length direction of the transverse bars 31. Each U-shaped steel bar 32 is fixedly connected to the four transverse bars 31, and the four transverse bars 31 are covered inside the U-shaped structure of the U-shaped steel bar 32. Since the outer hoop is the U-shaped steel bar 32, it is convenient to make certain on-site adjustments to the width size of the precast steel cage 3 and it is also convenient for installation.

[0025] As a solution, among the four transverse bars 31, the distance between each two adjacent transverse bars 31 is less than the diameter of the embedded steel bar 2. The purpose of this setting is that the embedded steel bar 2 will not radially escape from the gap between the two transverse bars 31 of the precast steel cage 3.

[0026] As a solution, when the precast steel cage 3 is sleeved on the embedded steel bar 2, all four transverse bars 31 are in contact with the embedded steel bar 2, that is, the precast steel cage 3 and the transverse bars 31 cooperate well and fit together.

[0027] After the precast steel cage 3 is sleeved on the embedded steel bar 2, it can be directly poured, or it can be further fixed by welding. It can also be that the precast steel cage 3 and the embedded steel bar 2 are in interference fit, that is, the reserved space between the four transverse bars 31 is less than the outer diameter of the embedded steel bar 2. During use, the staff needs to use expansion tools, such as pliers, etc., to slightly open the U-shaped structure of the precast steel cage 3 to sleeve it on the embedded steel bar 2. In this way, the two are firmly connected. Under this working condition, it can also be further fixed by welding.

[0028] During construction, one end of the precast steel cage 3 is sleeved and installed on the embedded steel bar 2 of one of the precast slabs, and the embedded steel bar 2 of the other precast slab is aligned with the other end of the precast steel cage 3 and sent in, that is, the embedded steel bars 2 preferably enter the precast steel cage 3 axially.

[0029] The number of notches 11 on each side of the precast slab is set according to the requirement of connection strength. The shape of the notch 11 is preferably a trapezoid that gradually widens from the inside to the outside, and preferably more than two embedded steel bars 2 are exposed in each notch 11.

[0030] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A novel precast slab connection structure, characterized in that: It includes precast slabs (1). An opening (11) is formed inwardly on the side of the precast slab (1). Embedded steel bars (2) are arranged in the precast slab (1). The embedded steel bars (2) extend out of the precast slab (1) and the ends of the embedded steel bars (2) are located within the opening (11). There are at least two precast slabs (1), and the openings (11) of the two precast slabs (1) are arranged oppositely. It further includes a precast steel cage (3). The two ends of the precast steel cage (3) are respectively sleeved with the end parts of the embedded steel bars (2) of the two precast slabs (1).

2. A novel precast slab connection structure according to claim 1, characterized in that: The precast steel cage (3) includes four transverse bars (31) arranged parallel to each other. A plurality of U-shaped steel bars (32) are arranged at intervals along the length direction of the transverse bars (31). Each U-shaped steel bar (32) is fixedly connected to the four transverse bars (31), and the four transverse bars (31) are covered within the U-shaped structure of the U-shaped steel bar (32).

3. A novel precast slab connection structure according to claim 2, characterized in that: Among the four transverse bars (31), the distance between every two adjacent transverse bars (31) is less than the diameter of the embedded steel bar (2).

4. A novel precast slab connection structure according to claim 2, characterized in that: When the precast steel cage (3) is sleeved on the embedded steel bar (2), all four transverse bars (31) are in contact with the embedded steel bar (2).

5. A novel precast slab connection structure according to claim 4, characterized in that: The precast steel cage (3) and the embedded steel bar (2) are in interference fit.

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