Prefabricated concrete girder

Abstract

The utility model discloses a prefabricated concrete main beam which comprises a plurality of upper longitudinal bars, a plurality of waist bars and a plurality of lower longitudinal bars, the plurality of lower longitudinal bars, the plurality of waist bars and the plurality of lower longitudinal bars are mutually bound and connected through iron wires, stirrups are bound on the peripheries of the upper longitudinal bars, the waist bars and the lower longitudinal bars at equal intervals, and the stirrups are connected with the lower longitudinal bars through steel wires. Rectangular pipes are welded to the upper ends of the lower longitudinal bars, T-shaped steel is welded to the lower ends of the upper longitudinal bars, a plurality of embedded parts are installed at the upper ends of the stirrups at equal intervals, first studs are installed on the embedded parts, and a plurality of second studs are installed on the T-shaped steel at equal intervals. The prefabricated concrete main beam solves the problems that in order to guarantee the overall compressive strength and stability, an existing prefabricated concrete main beam is usually large in weight and inconvenient to hoist and install.

Description

Technical Field

[0001] The utility model relates to a precast concrete main beam. Background Art

[0002] A precast concrete main beam is a concrete beam structure that is prefabricated in a factory and then transported to the construction site for installation. In the standardized production environment of the factory, the quality of the precast concrete main beam is easier to control. By using precise molds and advanced production processes, it can ensure high dimensional accuracy of the beam and uniform concrete strength, reducing quality fluctuations caused by unstable on-site construction conditions.

[0003] In order to ensure the overall compressive strength and stability, the existing precast concrete main beams are often heavy, which is inconvenient for hoisting and installation. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the existing defects and provide a precast concrete main beam that can ensure compressive strength and stability while reducing weight.

[0005] The technical solution to achieve the above purpose is: a precast concrete main beam, including multiple upper longitudinal bars, multiple waist bars and multiple lower longitudinal bars. The multiple lower longitudinal bars, multiple waist bars and multiple lower longitudinal bars are tied and connected to each other by iron wires. The multiple lower longitudinal bars are located below the multiple waist bars, and the multiple waist bars are located below the multiple upper longitudinal bars. Stirrups are tied at equal intervals around the upper longitudinal bars, the waist bars and the lower longitudinal bars. A rectangular tube is welded to the upper end of the lower longitudinal bars, and a T-shaped steel is welded to the lower end of the upper longitudinal bars. Multiple embedded parts are installed at equal intervals at the upper ends of the stirrups, and a first stud is installed on each embedded part. Multiple second studs are installed at equal intervals on the T-shaped steel.

[0006] Preferably, the inside of the stirrup is filled with concrete, and a layer of concrete is also poured on the outside of the stirrup.

[0007] Preferably, the distances between the lower longitudinal bars are the same, and the distances between the upper longitudinal bars are the same.

[0008] Preferably, the bottom of the first stud is in close contact with the upper surface of the T-shaped steel.

[0009] The beneficial effects of the present utility model are as follows: A rectangular tube is welded to the upper end of the lower longitudinal bars. By pouring concrete outside the rectangular tube, the overall weight of the main beam can be reduced. A T-shaped steel is welded to the lower end of the upper longitudinal bars. The T-shaped steel and the concrete work together to significantly improve the axial bearing capacity and compressive strength of the main beam. A plurality of embedded parts are equidistantly installed at the upper ends of each stirrup. A first stud is installed on each embedded part, and a plurality of second studs are equidistantly installed on the T-shaped steel. Installing a plurality of first studs and a plurality of second studs can effectively combine this structure with the floor slab, transfer the shear force of the floor slab, and ensure the overall stability. It can be seen that through the combined action of the rectangular tube, T-shaped steel, a plurality of first studs and a plurality of second studs, while reducing the weight, the overall compressive strength and stability are ensured. Description of the Drawings

[0010] Figure 1 is a cross-sectional view of the present utility model in the transverse direction;

[0011] Figure 2 is a cross-sectional view of the present utility model in the longitudinal direction.

[0012] In the figure: 1, rectangular tube; 2, lower longitudinal bar; 3, waist bar; 4, upper longitudinal bar; 5, stirrup; 6, T-shaped steel; 7, embedded part; 8, first stud; 9, second stud. Detailed Embodiment

[0013] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0014] Next, the present utility model will be further described in conjunction with the drawings.

[0015] As Figure 1-2 shown, a precast concrete main beam includes a plurality of upper longitudinal bars 4, a plurality of waist bars 3, a plurality of lower longitudinal bars 2, a plurality of stirrups 5, a rectangular tube 1, a T-shaped steel 6, a plurality of embedded parts 7, a plurality of first studs 8 and a plurality of second studs 9.

[0016] Specifically, multiple lower longitudinal bars 2, multiple waist bars 3 and multiple lower longitudinal bars 2 are tied and connected to each other by wire. The multiple lower longitudinal bars 2 are located below the multiple waist bars 3, and the multiple waist bars 3 are located below the multiple upper longitudinal bars 4. Stirrups 5 are tied at equal intervals around the periphery of the upper longitudinal bars 4, waist bars 3 and lower longitudinal bars 2. A rectangular tube 1 is welded to the upper end of the lower longitudinal bar 2. Pouring concrete outside the rectangular tube 1 can reduce the overall weight of the main beam. A T-shaped steel 6 is welded to the lower end of the upper longitudinal bar 4. The T-shaped steel 6 working together with the concrete can significantly improve the axial bearing capacity and compressive strength of the main beam. A plurality of embedded parts 7 are installed at equal intervals at the upper ends of the stirrups 5, and a first stud 8 is installed on each embedded part 7. A plurality of second studs 9 are installed at equal intervals on the T-shaped steel 6. Installing a plurality of first studs 8 and a plurality of second studs 9 can effectively combine the structure with the floor slab, transfer the shear force of the floor slab, and ensure the overall stability.

[0017] Specifically, the inside of the stirrup 5 is filled with concrete, and a layer of concrete is also poured on the outside of the stirrup 5. The distances between the lower longitudinal bars 2 are the same, and the distances between the upper longitudinal bars 4 are the same. The bottom of the first stud 8 is in close contact with the upper surface of the T-shaped steel 6, which can improve the stability of the structure.

[0018] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A precast concrete main beam, characterized in that, It includes multiple upper longitudinal bars (4), multiple waist bars (3) and multiple lower longitudinal bars (2). The multiple lower longitudinal bars (2), multiple waist bars (3) and multiple lower longitudinal bars (2) are tied and connected to each other by wire. The multiple lower longitudinal bars (2) are located below the multiple waist bars (3), and the multiple waist bars (3) are located below the multiple upper longitudinal bars (4). Stirrups (5) are tied at equal intervals around the periphery of the upper longitudinal bars (4), the waist bars (3) and the lower longitudinal bars (2). A rectangular tube (1) is welded to the upper end of the lower longitudinal bar (2), and an H-shaped steel (6) is welded to the lower end of the upper longitudinal bar (4). A plurality of embedded parts (7) are installed at equal intervals at the upper ends of the stirrups (5), and a first stud (8) is installed on each of the embedded parts (7). A plurality of second studs (9) are installed at equal intervals on the H-shaped steel (6).

2. The precast concrete main beam according to claim 1, characterized in that The inside of the stirrup (5) is filled with concrete, and a layer of concrete is also poured on the outside of the stirrup (5).

3. The precast concrete main beam according to claim 1, characterized in that, The distances between the lower longitudinal bars (2) are the same, and the distances between the upper longitudinal bars (4) are the same.

4. The precast concrete main beam according to claim 1, characterized in that, The bottom of the first stud (8) is in close contact with the upper surface of the H-shaped steel (6).

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