Integral Installable and Demountable Cable-Stayed Bridge Bracket and Construction Method

Abstract

This invention relates to the field of cable-stayed bridge technology, and in particular to an integrally detachable cable-stayed bridge bracket, comprising a base plate, on which multiple connecting cylinders are rotatably connected via multiple bearings. Each connecting cylinder is threaded with a threaded rod, and an inclined plate is fixedly connected to each threaded rod. Both ends of the inclined plate are fixedly connected to a support frame, which abuts against the tower beam. A tripod is fixedly connected between the support frame and the inclined plate. The connecting cylinders are driven by a drive mechanism. This invention also provides a construction method for the integrally detachable cable-stayed bridge bracket. This invention eliminates the need for on-site welding and assembly before fixing the bracket to the designated position on the tower cable, making installation convenient and saving construction time, thus accelerating project progress.

Description

Technical Field

[0001] This invention relates to the field of cable-stayed bridge technology, and in particular to an integrally detachable cable-stayed bridge bracket and its construction method. Background Technology

[0002] A cable-stayed bridge, also known as a skeletal-stayed bridge, is a type of bridge where the main girder is directly supported by numerous cables to the bridge towers. It is a structural system composed of compression-bearing towers, tension-bearing cables, and bending-resistant girder bodies. It can be viewed as a multi-span, elastically supported continuous beam where cables replace piers. When constructing the pylon crossbeams of a cable-stayed bridge, brackets are required to support and lift the crossbeams for concrete pouring. The commonly used method of on-site welding and assembly of the upper crossbeam brackets is difficult and time-consuming. To address this issue, we propose an integrally detachable cable-stayed bridge bracket system and its construction method. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies that involve on-site welding and assembly, which are difficult to install and increase time investment. The invention proposes an integrally detachable cable-stayed bridge bracket and its construction method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The design includes a detachable cable-stayed bridge bracket, comprising a base plate on which multiple connecting cylinders are rotatably connected via bearings. Each connecting cylinder is threaded with a threaded rod, and an inclined plate is fixedly connected to each threaded rod. The two ends of the inclined plate are fixedly connected to a support frame, which abuts against the tower beam. A tripod is fixedly connected between the support frame and the inclined plate. The connecting cylinders are driven by a drive mechanism.

[0005] Preferably, the drive mechanism includes a gear, a rack, and a hydraulic cylinder. The hydraulic cylinder is mounted on the base plate, the gear is fixedly mounted on the connecting cylinder, the rack meshes with the gear, and the rack is fixedly connected to the hydraulic cylinder.

[0006] Preferably, a fixed plate is fixedly connected to the threaded rod, and multiple bolts are threaded through the fixed plate and connected to the inclined plate.

[0007] Preferably, a protective sleeve is fixedly connected to the threaded rod, the protective sleeve is fitted onto the threaded rod, and the inner diameter of the protective sleeve is larger than the outer diameter of the connecting cylinder.

[0008] Preferably, the bearing is a slewing bearing.

[0009] Preferably, a protective box is fixedly connected to the base plate, the protective box has an opening on one side, the protective box is rotatably connected to the connecting cylinder through a bearing, and the driving mechanism is located inside the protective box.

[0010] Preferably, the support frame, inclined plate, and tripod are all made of stainless steel.

[0011] This invention also provides a construction method for an integrally detachable cable-stayed bridge bracket, comprising the following steps: S1. Install the base plate and install the connecting cylinder on the base plate; S2. Connect the threaded rod to the connecting cylinder, and adjust the threaded rod to the lowest position through the drive mechanism. Then, use a crane to lift the bracket. Finally, use bolts to fix the fixed plate to the inclined plate and connect the inclined plate to the fixed plate. S3. Finally, the hydraulic cylinder is extended to drive the gear to rotate, causing the bracket to rise to the corresponding height, and then the concrete of the tower beam is constructed. S4. After the concrete of the tower beam reaches the standard and the prestressed tendons are tensioned, the hydraulic cylinder contracts, which drives the rack to move, thereby driving the gear to rotate and lowering the bracket.

[0012] The advantages of the integrally detachable cable-stayed bridge bracket and construction method proposed in this invention are as follows: by rotating the connecting cylinder, the position of the adjusting threaded rod in the connecting cylinder can be adjusted to move the bracket up and down, so that the bracket can support the tower beam. Since the bracket is an integral structure, there is no need to weld and assemble it on site and then fix the bracket to the specified position on the tower cable. The installation is convenient and also helps to save construction time and speed up the progress of the project. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the integrally detachable cable-stayed bridge bracket and construction method proposed in this invention; Figure 2 This is a sectional view of a perspective view of the integrally detachable cable-stayed bridge bracket and construction method proposed in this invention. Figure 3 The present invention relates to an integrally detachable cable-stayed bridge bracket and its construction method. Figure 2 The front view; Figure 4 The present invention proposes an integrally detachable cable-stayed bridge bracket. Figure 2 Enlarged view of section A.

[0014] In the diagram: 1. Base plate; 2. Protective box; 3. Connecting cylinder; 4. Gear; 5. Rack; 6. Hydraulic cylinder; 7. Protective sleeve; 8. Threaded rod; 9. Support frame; 10. Inclined plate; 11. Triangular frame; 12. Bearing; 13. Fixing plate; 14. Bolt. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0016] Reference Figure 1-4 The integrally detachable cable-stayed bridge bracket includes a base plate 1. Multiple connecting cylinders 3 are rotatably connected to the base plate 1 via multiple bearings 12. Each connecting cylinder 3 is threaded with a threaded rod 8. An inclined plate 10 is fixedly connected to each threaded rod 8. The two ends of the inclined plate 10 are fixedly connected to a support frame 9. The support frame 9 abuts against the tower beam. By rotating the connecting cylinder 3, the position of the threaded rod 8 within the connecting cylinder 3 can be adjusted to raise and lower the bracket, thus supporting the tower beam. Since the bracket is an integral structure, there is no need for on-site welding and assembly before fixing the bracket to the designated position on the tower cable. This facilitates installation, saves construction time, and speeds up the project progress.

[0017] A tripod 11 is fixedly connected between the support frame 9 and the inclined plate 10. The connecting cylinder 3 is driven by a drive mechanism. Since the support frame 9, the inclined plate 10, and the tripod 11 are used to form a bracket, multiple triangular structures are set inside the bracket to enhance its stability.

[0018] The drive mechanism includes a gear 4, a rack 5, and a hydraulic cylinder 6. The hydraulic cylinder 6 is mounted on the base plate 1, the gear 4 is fixedly mounted on the connecting cylinder 3, the rack 5 meshes with the gear 4, and the rack 5 is fixedly connected to the hydraulic cylinder 6. By using the extension and retraction of the hydraulic cylinder 6 to drive the rack 5 to move, the gear 4 is driven to rotate, which in turn drives the connecting cylinder 3 to rotate, thereby adjusting the position of the threaded rod 8 in the connecting cylinder 3.

[0019] A fixed plate 13 is fixedly connected to the threaded rod 8. Multiple bolts 14 are installed through the fixed plate 13. The multiple bolts 14 are threadedly connected to the inclined plate 10. The design of the bolts 14 makes it possible to fix and disassemble the fixed plate 13 and the inclined plate 10.

[0020] During the pouring of the cable tower beam, concrete may fall and become contaminated on the bolt rod 8, causing the threads on the threaded rod 8 to become blocked. A protective sleeve 7 is fixedly connected to the threaded rod 8. The inner diameter of the protective sleeve 7 is larger than the outer diameter of the connecting cylinder 3. By using the design of the protective sleeve 7, it protects the threaded rod 8, prevents concrete from getting on it, and avoids damage to the threaded connection.

[0021] Bearing 12 is a slewing bearing. Since the bearing needs to bear axial force load when providing support, a slewing bearing is used to bear the axial force load.

[0022] A protective box 2 is fixedly connected to the base plate 1. The protective box 2 has an opening on one side. The protective box 2 is rotatably connected to the connecting cylinder 3 through a bearing. The drive mechanism is located inside the protective box 2. In order to prevent the drive mechanism from getting contaminated with concrete, the protective box 2 is placed on top to protect it. In order to facilitate the maintenance of the internal components, the protective box 2 is designed to be open.

[0023] The support frame 9, the tilt plate 10, and the tripod 11 are all made of stainless steel.

[0024] This invention also provides a construction method for an integrally detachable cable-stayed bridge bracket, comprising the following steps: S1. Install the base plate 1 and install the connecting cylinder 3 on the base plate 1; S2. Connect the threaded rod 8 to the connecting cylinder 3, and adjust the threaded rod 8 to the lowest position through the drive mechanism. Then, use a crane to lift the bracket. Finally, use bolts 14 to fix the fixed plate 13 to the inclined plate 10 and connect the inclined plate 10 and the fixed plate 13. S3. Finally, the hydraulic cylinder 6 is extended to drive the gear 4 to rotate, causing the bracket to rise to the corresponding height, and then the concrete of the cable tower beam is constructed. S4. After the concrete of the tower beam reaches the standard and the prestressed tendons are tensioned, the hydraulic cylinder 6 contracts, which drives the rack 5 to move, thereby driving the gear 4 to rotate and lower the bracket.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A construction method for an integrally detachable cable-stayed bridge bracket, characterized in that, The integrally detachable cable-stayed bridge bracket includes a base plate (1), on which multiple connecting cylinders (3) are rotatably connected via multiple bearings (12). Each of the multiple connecting cylinders (3) is threaded with a threaded rod (8), and an inclined plate (10) is fixedly connected to each of the multiple threaded rods (8). The two ends of the inclined plate (10) are fixedly connected to a support frame (9). The support frame (9) abuts against the cable tower crossbeam. A tripod (11) is fixedly connected between the support frame (9) and the inclined plate (10). The connecting cylinders (3) are driven by a drive mechanism. The drive mechanism includes a gear (4), a rack (5), and a hydraulic cylinder (6). The hydraulic cylinder (6) is mounted on the base plate (1), the gear (4) is fixedly mounted on the connecting cylinder (3), the rack (5) meshes with the gear (4), and the rack (5) is fixedly connected to the hydraulic cylinder (6). A fixed plate (13) is fixedly connected to the threaded rod (8), and multiple bolts (14) are provided through the fixed plate (13). The multiple bolts (14) are threadedly connected to the inclined plate (10). The specific construction method is as follows: S1. Install the base plate (1) and install the connecting cylinder (3) on the base plate (1); S2. Connect the threaded rod (8) to the connecting cylinder (3), and adjust the threaded rod (8) to the lowest position through the drive mechanism. Then, use a crane to lift the bracket. Finally, use bolts (14) to fix the fixed plate (13) to the inclined plate (10) and connect the inclined plate (10) and the fixed plate (13). S3. Finally, the hydraulic cylinder (6) is extended to drive the gear (4) to rotate, so that the bracket is raised to the corresponding height, and then the concrete of the cable tower beam is constructed. S4. After the concrete of the tower beam reaches the standard and the prestressed tendons are tensioned, the hydraulic cylinder (6) contracts, driving the rack (5) to move, thereby driving the gear (4) to rotate and lower the bracket.

2. The construction method of the integrally installable and detachable cable-stayed bridge bracket according to claim 1, characterized in that, A protective sleeve (7) is fixedly connected to the threaded rod (8). The protective sleeve (7) is sleeved on the threaded rod (8), and the inner diameter of the protective sleeve (7) is larger than the outer diameter of the connecting cylinder (3).

3. The construction method of the integrally installed and detachable cable-stayed bridge bracket according to claim 1, characterized in that, The bearing (12) is a slewing bearing.

4. The construction method of the integrally installable and detachable cable-stayed bridge bracket according to claim 1, characterized in that, A protective box (2) is fixedly connected to the base plate (1). The protective box (2) has an opening on one side. The protective box (2) is rotatably connected to the connecting cylinder (3) through a bearing. The driving mechanism is located inside the protective box (2).

5. The construction method of the integrally installable and detachable cable-stayed bridge bracket according to claim 1, characterized in that, The support frame (9), the inclined plate (10), and the tripod (11) are all made of stainless steel.

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