Concrete-filled anti-crack low-prestressed reinforcement structure for expansion joint

Abstract

The utility model provides an expansion joint filled concrete anti-crack low-prestress steel bar structure, which belongs to the technical field of bridge expansion joint construction and comprises a toothed plate horizontally arranged along the length direction of an expansion joint, and anchoring steel bars are arranged on the left side and the right side of the toothed plate. The base plate is arranged at the end of one side of the toothed plate and located in the anchoring steel bars, the locking bolts are arranged on the rear side of the base plate, the protection pipe is arranged on the front side of the base plate, the front side of the protection pipe is fixedly connected with the base plate, and the steel beam is arranged in the protection pipe. A connecting block is arranged on the front side of the protection pipe, a spiral steel bar is arranged on the front side of the connecting block, an anchor pad is arranged on the front side of the spiral steel bar, and an anchor bolt is arranged on the front side of the anchor pad. The gap of an existing anti-crack low-prestress steel bar structure of the bridge expansion joint is filled, the risk of cracking of the position of the expansion joint can be remarkably reduced by conducting prestress construction on the bridge expansion joint, and driving safety is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge expansion joint construction, and in particular relates to an expansion joint-filled concrete crack-resistant low-prestressed steel bar structure. Background Art

[0002] Bridge expansion joints are used to accommodate the displacement and connection between the superstructure caused by vehicle loads and bridge construction materials. Prestressing refers to the application of a pre-designed tension or pressure to concrete structures. This is applied after the concrete components are cast, increasing their tensile strength and durability, thereby reducing the likelihood of structural deformation and cracking.

[0003] Existing construction techniques lack prestressed structures for expansion joints, leading to cracks in bridge expansion joints after extended use. Damage to these joints can severely impact driving speed, comfort, and safety, and in severe cases, can lead to accidents. Existing prestressed steel structures, which are designed for high prestress in beams, are not suitable for the low prestress required for expansion joints. Therefore, a crack-resistant, low-prestressed steel structure for expansion joint filling with concrete is urgently needed to prevent cracks and damage in expansion joints, thereby improving driving safety. Utility Model Content

[0004] The purpose of the utility model is to provide a crack-resistant low-prestressed steel bar structure for filling expansion joints with concrete, and to perform prestressing construction on bridge expansion joints, thereby reducing the possibility of cracks in the bridge expansion joints in the later stage and improving driving safety.

[0005] To achieve the above-mentioned purpose, the utility model provides a low-prestressed steel bar structure for crack-resistant concrete filling of expansion joints, comprising a tooth plate arranged horizontally from front to rear along the length direction of the expansion joint, anchor steel bars are vertically arranged on the left and right sides of the tooth plate, and a plurality of anchor steel bars are arranged equidistantly along the length direction of the tooth plate, the anchor steel bars are arranged perpendicular to the length direction of the tooth plate, a first steel bundle and a second steel bundle are arranged inside the anchor steel bars, pads are provided on both sides of the rear end of the tooth plate, the pads are arranged parallel to the anchor steel bars, locking bolts are provided on the rear side of the pads, a protective tube is provided on the front side of the pad, the front side of the protective tube is fixedly connected to the pad, the protective tube is sleeved on the first steel bundle and the second steel bundle, a connecting block is provided on the front side of the protective tube, a spiral steel bar is provided on the front side of the connecting block, the spiral steel bar is fixedly connected to the connecting block, an anchor pad is provided on the front side of the spiral steel bar, the spiral steel bar is fixedly connected to the anchor pad, an anchor bolt is provided on the front side of the anchor pad, and the anchor bolt is threadedly connected to the anchor pad.

[0006] Furthermore, the first steel bundle and the second steel bundle are arranged in parallel, the first steel bundle and the second steel bundle match the length of the expansion joint, and the spacing between the first steel bundle and the second steel bundle is 10 cm.

[0007] Furthermore, the base plate is provided with penetrating grouting holes and penetrating steel bundle holes, and the sizes of the steel bundle holes match the first steel bundle and the second steel bundle.

[0008] Furthermore, one end of the first steel bundle passes through the steel bundle hole and is fixedly connected to the locking bolt, and the other end of the first steel bundle passes through the protective tube, the connecting block, and the anchor pad in sequence and is fixedly connected to the anchor bolt; one end of the second steel bundle passes through the steel bundle hole and is fixedly connected to the locking bolt, and the other end of the second steel bundle passes through the protective tube, the connecting block, and the anchor pad in sequence and is fixedly connected to the anchor bolt.

[0009] Furthermore, the spiral steel bar is sleeved on the first steel bundle and the second steel bundle.

[0010] Furthermore, the first steel bundle and the second steel bundle are located inside the anchor steel bar, and the first steel bundle and the second steel bundle are arranged parallel to the tooth plate.

[0011] The advantages of the present invention are: the present invention provides a kind of expansion joint filling concrete anti-cracking low prestressed steel bar structure, which fills the gap of the current bridge expansion joint anti-cracking low prestressed steel bar structure, and through the prestressing construction of the bridge expansion joint, the risk of cracking at the expansion joint position can be significantly reduced, greatly improving driving safety.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the utility model.

[0014] Figure 2 This is a schematic diagram of a new cross-sectional structure used in this invention.

[0015] Figure 3 This is an enlarged schematic diagram of point A.

[0016] Figure 4 This is an enlarged schematic diagram of point B.

[0017] Figure 5 It is a schematic diagram of the pad structure.

[0018] Explanation of the accompanying symbols: 1. Connecting block; 2. First steel bundle; 3. Spiral steel bar; 4. Anchor pad; 5. Anchor bolt; 6. Second steel bundle; 7. Protective tube; 8. Pad; 81. Grouting hole; 82. Steel bundle hole; 9. Locking bolt; 10. Anchor steel bar; 11. Tooth plate. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0023] Example 1

[0024] This embodiment provides Figures 1 to 5The expansion joint filling concrete crack-resistant low prestressed steel bar structure shown in FIG, comprises a tooth plate 11 horizontally arranged from front to back along the length direction of the expansion joint, anchor steel bars 10 are vertically arranged on the left and right sides of the tooth plate 11, and a number of anchor steel bars 10 are arranged equidistantly along the length direction of the tooth plate 11, and the anchor steel bars 10 are arranged perpendicular to the length direction of the tooth plate 11. A first steel bundle 2 and a second steel bundle 6 are arranged inside the anchor steel bar 10, and pads 8 are provided on both sides of the rear end of the tooth plate 11. The pads 8 are arranged on one side of the bridge side guardrail. The pads 8 are longitudinally located inside the anchor steel bars 10, and the pads 8 are arranged parallel to the anchor steel bars 10. A locking bolt 9 is provided on the rear side of the pad 8, and a protective tube 7 is provided on the front side of the pad 8. The front side of the protective tube 7 is fixedly connected to the pad 8, and the protective tube 7 is sleeved on the first On the steel strands 2 and 6, a connecting block 1 is provided in front of the protective tube 7. A spiral rebar 3 is provided in front of the connecting block 1 and fixedly connected to the connecting block 1. An anchor pad 4 is provided in front of the spiral rebar 3 and fixedly connected to the anchor pad 4. An anchor bolt 5 is provided in front of the anchor pad 4 and threadedly connected to the anchor pad 4. The anchor pad 4 is provided on one side of the central guardrail of the bridge. One end of the first steel strand 2 passes through the steel strand hole 82 and is fixedly connected to the locking bolt 9. The other end of the first steel strand 2 passes through the protective tube 7, the connecting block 1, and the anchor pad 4 in sequence, and is fixedly connected to the anchor bolt 5. One end of the second steel strand 6 passes through the steel strand hole 82 and is fixedly connected to the locking bolt 9. The other end of the second steel strand 6 passes through the protective tube 7, the connecting block 1, and the anchor pad 4 in sequence, and is fixedly connected to the anchor bolt 5. The spiral rebar 3 is sleeved onto the first and second steel strands 2 and 6. The components used in this utility model can be mass-produced, saving costs, and are simple to assemble and use, making them easy for workers to operate.

[0025] Further, such as Figure 2 As shown, the first and second steel strands 2 and 6 are arranged parallel to each other, with a spacing of 10 cm between them. The first and second steel strands 2 and 6 are located within the anchor bar 10 and are parallel to the tooth plate 11. The lengths of the first and second steel strands 2 and 6 can be adjusted based on the actual bridge deck width, providing a wider range of applicability.

[0026] During the construction process, the anchor pad 4 is first fixedly connected to the end beam of the central guardrail of the bridge, and then the first steel bundle 2 and the second steel bundle 6 are respectively passed through the anchor pad 4 and connected to the anchor bolts 5. Subsequently, the spiral reinforcement 3 is put on the first steel bundle 2 and the second steel bundle 6, and the spiral reinforcement 3 is fixedly connected to the anchor pad 4. Subsequently, the connecting block 1 is respectively passed through the first steel bundle 2 and the second steel bundle 6, and fixedly connected to the spiral reinforcement 3.

[0027] Then put the protective tube 7 on the first steel bundle 2 and the second steel bundle 6, and then pass the pad 8 through the first steel bundle 2 and the second steel bundle 6 and connect them to the protective tube 7 at the guardrail position on the side of the bridge. After the expansion joint construction is completed, use equipment to apply a low tensile force to the first steel bundle 2 and the second steel bundle 6, and finally use the locking bolt 9 to lock the first steel bundle 2 and the second steel bundle 6, and grout the protective tube 7 through the grouting hole 81 to complete the construction of the expansion joint filling concrete crack-resistant low-prestressed steel bars.

[0028] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A crack-resistant low-prestressed steel bar structure for filling expansion joints with concrete, comprising toothed plates (11) arranged horizontally from front to back along the length of the expansion joint, characterized in that: Anchoring steel bars (10) are vertically arranged on the left and right sides of the tooth plate (11), and a number of the anchoring steel bars (10) are evenly spaced along the length direction of the tooth plate (11). The anchoring steel bars (10) are arranged perpendicular to the length direction of the tooth plate (11). A first steel bundle (2) and a second steel bundle (6) are arranged inside the anchoring steel bars (10). Pads (8) are arranged on both sides of the rear end of the tooth plate (11). The pads (8) are arranged parallel to the anchoring steel bars (10). A locking bolt (9) is arranged on the rear side of the pad (8), and a protective tube (7) is arranged on the front side of the pad (8). The front side of the protective tube (7) is fixedly connected to the pad (8), and the protective tube (7) is sleeved on the first steel bundle (2) and the second steel bundle (6). The front side of the protective tube (7) is provided with a connecting block (1), and the front side of the connecting block (1) is provided with a spiral steel bar (3), and the spiral steel bar (3) is fixedly connected to the connecting block (1). The front side of the spiral steel bar (3) is provided with an anchor pad (4), and the spiral steel bar (3) is fixedly connected to the anchor pad (4). The front side of the anchor pad (4) is provided with an anchor bolt (5), and the anchor bolt (5) is threadedly connected to the anchor pad (4).

2. The expansion joint-filled concrete crack-resistant low-prestressed steel bar structure according to claim 1, characterized in that: The first steel bundle (2) and the second steel bundle (6) are arranged in parallel, the first steel bundle (2) and the second steel bundle (6) match the length of the expansion joint, and the spacing between the first steel bundle (2) and the second steel bundle (6) is 10 cm.

3. The expansion joint-filled concrete crack-resistant low-prestressed steel bar structure according to claim 1, characterized in that: The backing plate (8) is provided with a through grouting hole (81) and a through steel bundle hole (82), and the size of the steel bundle hole (82) matches the first steel bundle (2) and the second steel bundle (6).

4. The expansion joint-filled concrete crack-resistant low-prestressed steel bar structure according to claim 3, characterized in that: One end of the first steel bundle (2) passes through the steel bundle hole (82) and is fixedly connected to the locking bolt (9), and the other end of the first steel bundle (2) passes through the protective tube (7), the connecting block (1), and the anchor pad (4) in sequence and is fixedly connected to the anchor bolt (5); one end of the second steel bundle (6) passes through the steel bundle hole (82) and is fixedly connected to the locking bolt (9), and the other end of the second steel bundle (6) passes through the protective tube (7), the connecting block (1), and the anchor pad (4) in sequence and is fixedly connected to the anchor bolt (5).

5. The expansion joint-filled concrete crack-resistant low-prestressed steel bar structure according to claim 1, characterized in that: The spiral steel bar (3) is sleeved on the first steel bundle (2) and the second steel bundle (6).

6. The expansion joint-filled concrete crack-resistant low-prestressed steel bar structure according to claim 1, characterized in that: The first steel bundle (2) and the second steel bundle (6) are located inside the anchor steel bar (10), and the first steel bundle (2) and the second steel bundle (6) are arranged parallel to the tooth plate (11).

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