Fabricated double-T-beam flexible steel strand hanging ring

Abstract

The utility model discloses an assembly type double-T-beam flexible steel strand hanging ring which comprises a prefabricated beam body, a galvanized round pipe and prestressed steel strands, the galvanized round pipe is arranged at the top of the prefabricated beam body, the prestressed steel strands are arranged in the galvanized round pipe and the prefabricated beam body, and the prestressed steel strands are used for penetrating through the galvanized round pipe to penetrate into the prefabricated beam body to be connected and fixed. The prefabricated beam body is of an upper structure of an assembly type concrete bridge, the number of the galvanized round pipes is two, the two galvanized round pipes form a single ring, the two galvanized round pipes are fixed through double-face welding seams, and the two galvanized round pipes are in a U shape. The prestressed steel strand is used for penetrating through the galvanized round pipe, going deep into the precast beam body and then being exploded and bent to form the inverted L-shaped structure, and the inverted L-shaped structure is used for being connected with precast beam body concrete, so that the anchoring capacity of the prestressed steel strand is enhanced; and through the anchoring steel plate and the inverted-L-shaped structure, the stress transmission range can be enlarged, the stress concentration effect is reduced, and meanwhile the compressive rigidity and stability of the anchoring position are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and specifically is an assembled double T-beam flexible steel strand lifting ring. Background Art

[0002] Compared with traditional construction methods, prefabricated bridges have the advantages of accelerating construction progress, improving project quality and improving on-site construction environment. Due to the advantages of high strength, easy availability of materials and low production and manufacturing costs, the lifting rings of prestressed steel strands are widely used in the field of prefabricated bridges.

[0003] However, prestressed steel strands also have some problems: the lifting point is difficult to locate, the steel strands are prone to slippage with the sleeve during the lifting process, and stress concentration is prone to occur at the lifting point, affecting the safety of the structure. Summary of the invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a prefabricated double T-beam flexible steel strand lifting ring, which provides safety protection for the bridge lifting process and improves the overall anchoring performance of the lifting point of the prefabricated bridge flexible steel strand lifting ring, and solves the problems of difficult installation and construction positioning of the existing prestressed steel strand lifting ring and slippage between the steel strand and the sleeve.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an assembled double T-beam flexible steel strand lifting ring, comprising a prefabricated beam body, a galvanized round tube and a prestressed steel strand, wherein a galvanized round tube is provided on the top of the prefabricated beam body, and prestressed steel strands are provided in the galvanized round tube and the prefabricated beam body, and the prestressed steel strands are used to penetrate the galvanized round tube and penetrate into the prefabricated beam body for connection and fixation.

[0006] Preferably, the prefabricated beam body is an assembled concrete bridge superstructure.

[0007] Preferably, there are two galvanized round tubes in total, the two galvanized round tubes form a single ring, the two galvanized round tubes are fixed by double-sided welds, and the two galvanized round tubes are in a "U" shape.

[0008] Preferably, the galvanized round tube is used to wrap the exposed portion of the prestressed steel strands at the top of the prefabricated beam body.

[0009] Preferably, the prestressed steel strand is a finished product of epoxy spray-coated unbonded steel strand.

[0010] Preferably, the prestressed steel strand comprises an inverted L-shaped structure, and the inverted L-shaped structure is formed by the prestressed steel strand penetrating a certain distance into the prefabricated beam body and then blasting and bending.

[0011] Preferably, the prestressed steel strand also includes an anchoring steel plate. An anchoring steel plate is provided above the inverted L-shaped structure where the prestressed steel strand penetrates into the prefabricated beam body. The anchoring steel plate is a rectangular steel plate. The anchoring steel plate is used to fix the prestressed steel strand in the prefabricated beam body.

[0012] Compared with the existing technology, the utility model has the following beneficial effects: the utility model uses prestressed steel strands to penetrate the galvanized round tube and penetrate into the prefabricated beam body, and then blast and bend it to form an inverted L-shaped structure. The inverted L-shaped structure is used to connect with the concrete of the prefabricated beam body, thereby enhancing the anchoring capacity of the prestressed steel strands. Moreover, by passing multiple bundles of prestressed steel strands through the galvanized round tube, slippage of the prestressed steel strands is avoided, which is safer. The anchoring steel plate and the inverted L-shaped structure can increase the force transmission range, reduce the stress concentration effect, and at the same time increase the compressive stiffness and stability of the anchoring point. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the transverse plane structure of the bridge in which the prefabricated beam, galvanized round tube and prestressed steel strand are connected.

[0014] Figure 2 This is a schematic diagram of the longitudinal bridge structure of the practical prefabricated beam, galvanized round tube and prestressed steel strand connection.

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the connection between the practical prefabricated beam, galvanized round tube and prestressed steel strand.

[0016] Markings in the figure: 1. Prefabricated beam, 2. Galvanized round pipe, 3. Prestressed steel strand, 4. Anchor steel plate, 5. Inverted L-shaped structure, 6. Double-sided weld. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 3 As shown, the utility model provides a technical solution: an assembled double T-beam flexible steel strand lifting ring, comprising a prefabricated beam body 1, a galvanized round tube 2 and a prestressed steel strand 3, wherein a galvanized round tube 2 is provided on the top of the prefabricated beam body 1, and prestressed steel strand 3 is provided in the galvanized round tube 2 and the prefabricated beam body 1, and the prestressed steel strand 3 is used to penetrate the galvanized round tube 2 and penetrate into the prefabricated beam body 1 for connection and fixation; the prestressed steel strand 3 is anchored in the concrete of the prefabricated beam body 1, so that the prestressed steel strand 3 is connected to the prefabricated beam body 1 as a whole, in order to improve the overall force performance of the anchoring area penetrating into the prefabricated beam body 1.

[0018] Furthermore, the prefabricated beam body 1 is a prefabricated concrete bridge superstructure.

[0019] Furthermore, there are two galvanized round tubes 2, which form a single ring. The two galvanized round tubes 2 are fixed by double-sided welds 6, and the diameter of the two galvanized round tubes 2 is 2 cm. The shape of the two galvanized round tubes 2 is "U"-shaped; it is convenient for multiple bundles of prestressed steel strands 3 to pass through the galvanized round tubes 2, avoiding the slippage of the prestressed steel strands 3, and being safer; and the two galvanized round tubes 2 are fixed by welding with double-sided welds 6, so that the two galvanized round tubes 2 become a whole, which is more firm.

[0020] Furthermore, the galvanized round tube 2 is used to wrap the prestressed steel strand 3 exposed at the top of the prefabricated beam body 1; by using the galvanized round tube 2 to completely wrap the exposed part of the prefabricated beam body 1, the prestressed steel strand 3 is protected from damage during the lifting process, thereby protecting the prestressed steel strand 3.

[0021] Furthermore, the prestressed steel strand 3 is a finished product of epoxy sprayed unbonded steel strand.

[0022] Furthermore, the prestressed steel strand 3 includes an inverted L-shaped structure 5, which is formed by blasting and bending the prestressed steel strand 3 after the prestressed steel strand 3 penetrates 150 cm into the prefabricated beam body; the inverted L-shaped structure 5 is used to connect with the concrete of the prefabricated beam body 1 to enhance the anchoring capacity of the prestressed steel strand 3, and at the same time, the prestressed steel strand 3 penetrates within 50 cm into the prefabricated beam body 1, on the one hand, ensuring the anchoring depth requirement of the prestressed steel strand 3, and on the other hand, not affecting the original force of the prefabricated beam body 1 at this location.

[0023] Furthermore, the prestressed steel strand 3 also includes an anchoring steel plate 4. The prestressed steel strand 3 penetrates deep into the prefabricated beam body 1, and an anchoring steel plate 4 is also provided above the inverted L-shaped structure 5. The anchoring steel plate 4 is a rectangular steel plate. The anchoring steel plate 4 is used to fix the prestressed steel strand 3 in the prefabricated beam body 1. The prestressed steel strand 3 passes through the galvanized round tube 2, penetrates deep into the prefabricated beam body 1 for a distance, passes through the anchoring steel plate 4, and then explodes and bends at the end to form an inverted L-shaped structure 5, so that the prestressed steel strand 3 and the prefabricated beam body 1 are anchored as a whole. The anchoring steel plate 4 and the inverted L-shaped structure 5 can increase the force transmission range and reduce the stress concentration effect, and at the same time, the compressive stiffness and stability of the anchoring point can also be increased.

[0024] 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. An assembled double T-beam flexible steel strand lifting ring, comprising a prefabricated beam body (1), a galvanized round tube (2) and a prestressed steel strand (3), characterized in that: A galvanized round tube (2) is provided on the top of the prefabricated beam body (1), and prestressed steel strands (3) are provided inside the galvanized round tube (2) and the prefabricated beam body (1). The prestressed steel strands (3) are used to penetrate the galvanized round tube (2) and penetrate into the prefabricated beam body (1) to be connected and fixed.

2. The assembled double T-beam flexible steel strand lifting ring according to claim 1, characterized in that: The prefabricated beam body (1) is an assembled concrete bridge superstructure.

3. The assembled double T-beam flexible steel strand lifting ring according to claim 2 is characterized by: There are two galvanized round tubes (2) in total. The two galvanized round tubes (2) form a single ring. The two galvanized round tubes (2) are fixed with double-sided welds (6). The two galvanized round tubes (2) are in a "U" shape.

4. The assembled double T-beam flexible steel strand lifting ring according to claim 3 is characterized by: The galvanized round tube (2) is used to wrap the exposed portion of the prestressed steel strands (3) at the top of the prefabricated beam body (1).

5. The assembled double T-beam flexible steel strand lifting ring according to claim 4, characterized in that: The prestressed steel strand (3) is a finished product of epoxy spray-coated non-bonded steel strand.

6. The assembled double T-beam flexible steel strand lifting ring according to claim 5, characterized in that: The prestressed steel strand (3) comprises an inverted L-shaped structure (5), and the inverted L-shaped structure (5) is formed by the prestressed steel strand (3) penetrating a certain distance into the prefabricated beam body (1) and then being exploded and bent.

7. The assembled double T-beam flexible steel strand lifting ring according to claim 6, characterized in that: The prestressed steel strand (3) further comprises an anchoring steel plate (4). The prestressed steel strand (3) is inserted into the prefabricated beam body (1). An anchoring steel plate (4) is also provided above the inverted L-shaped structure (5). The anchoring steel plate (4) is a rectangular steel plate. The anchoring steel plate (4) is used to fix the prestressed steel strand (3) in the prefabricated beam body (1).

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