Deviation correcting device and method for large-span curve steel box girder pushing
By designing a combination of correction and guidance mechanisms, the problem of deviation during the jacking process of curved steel box girders was solved, achieving high-precision and stable construction, and reducing construction costs and labor intensity.
Patent Information
- Application Number
- CN202511225574.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2025-10-28
AI Technical Summary
Traditional curved steel box girders are prone to displacement or deflection during the jacking process, which leads to reduced construction accuracy and safety hazards. Furthermore, the existing correction devices are not stable enough, increasing construction costs and labor intensity.
Design a device that includes a correction mechanism and a guide mechanism. Through the cooperation of the correction component and the guide rod, the steel box girder is positioned and guided to ensure that it moves along a predetermined line. A drive component is used to drive the placement plate and support plate to improve stability.
This improved the positioning accuracy and stability during the jacking process of the steel box girder, reduced construction difficulty and cost, decreased safety hazards, and increased construction efficiency.
Smart Images
Figure CN120844488A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of steel box girder launching construction technology, and particularly relates to a correction device and method for launching large-span curved steel box girders. Background Technology
[0002] Steel box girders, a common structural form for long-span bridges, are named for their unique box-shaped design. They are precisely connected by full welding of key components such as the top plate, bottom plate, web, transverse diaphragms, longitudinal diaphragms, and stiffening ribs. This structural form endows steel box girders with extremely high bending resistance, torsional stiffness, lateral bending stiffness, and overall stability. Their compact beam height makes them particularly suitable for overpasses and bridge projects with limited building height. Furthermore, their hollow internal structure facilitates the placement of ancillary facilities such as cables, water pipes, and gas cylinders. In addition, the aesthetically pleasing appearance and wide applicability of steel box girders make them a preferred material in the construction of large bridges, highways, airports, and high-speed railways.
[0003] In the construction of large-scale highway bridges, expressway bridges, and railway bridges, traditional devices for correcting axial misalignment of curved steel box girders face significant challenges. Due to insufficient stability and a lack of guiding mechanisms, these devices are prone to misalignment or deflection of the steel box girder during the jacking process, severely reducing construction accuracy and threatening the overall quality and safety of the bridge. Once the girder deviates from the intended path, not only are additional manpower and resources required for correction, increasing construction costs, but construction efficiency is also significantly reduced. More importantly, unstable jacking devices may cause safety hazards such as steel box girder detachment or overturning, posing a serious threat to construction workers. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides a correction device and method for jacking large-span curved steel box girders, which improves the stability and accuracy of steel box girders during the jacking process.
[0005] The first aspect of the present invention provides a correction device for jacking long-span curved steel box girders, comprising: Base plate; A correction mechanism, comprising a placement plate and several correction components, wherein the correction components are symmetrically arranged on both sides of the placement plate, the placement plate is used to support the steel box girder, and the correction components move in the direction perpendicular to the traveling direction of the steel box girder to constrain the traveling path of the steel box girder. A guiding mechanism is provided on the top of the base plate. The guiding mechanism includes a driving component and a guiding component. The driving component is used to drive the placement plate to move along the traveling direction of the steel box girder. The guiding component includes two guide rods, the axes of which are parallel to the traveling direction of the steel box girder. Two sets of support plates are symmetrically arranged at the bottom of the placement plate. The two sets of support plates are slidably connected to the two guide rods respectively through pulleys.
[0006] Optionally, the correction assembly includes a limiting plate and a jacking member. One end of the limiting plate is connected to one end of the placement plate, and the jacking member is disposed on the limiting plate. The jacking member moves in a direction perpendicular to the traveling direction of the steel box girder to contact the steel box girder.
[0007] Optionally, the jacking component includes a telescopic rod and a top plate, the limiting plate includes a vertically connected vertical plate and a horizontal plate, the horizontal plate is connected to the placement plate, one end of the telescopic rod is connected to the vertical plate, the other end of the telescopic rod is connected to the top plate, and the top plate is used to contact the steel box girder; The horizontal plane where the top plate is located is perpendicular to the horizontal plane where the horizontal plate is located.
[0008] Optionally, the jacking component further includes two limiting rods, one end of which is connected to the vertical plate, and the other end of which is movably disposed within the top plate.
[0009] Optionally, the driving assembly includes a driving member and a threaded rod. The threaded rod is disposed on the base plate, and a threaded cylinder is disposed at the center of the bottom of the placement plate. The threaded cylinder is threadedly connected to the threaded rod. The driving member drives the threaded rod to rotate, and the threaded cylinder moves along the axial direction of the threaded rod. The axial direction of the threaded rod is parallel to the travel direction of the steel box girder.
[0010] Optionally, the top of the base plate is provided with two mounting plates, the driving component is disposed on the base plate, and a threaded hole is opened in the middle of the mounting plate away from the driving component. One end of the threaded rod is hinged to the output end of the driving component, and the other end is rotatably connected to the threaded hole.
[0011] Optionally, the two ends of the guide rod are respectively connected to the two mounting plates; Each set of support plates includes two support plates, and the pulley is disposed between the two support plates, with the pulley slidingly engaging with the outer periphery of the guide rod.
[0012] Optionally, the bottom of the base plate is provided with a plurality of mounting holes for connecting the lifting mechanism.
[0013] A second aspect of the present invention provides a method for correcting the deviation of a long-span curved steel box girder during jacking, which is based on a correction device for jacking a long-span curved steel box girder as described in any of the preceding claims, and includes the following steps: S1. Initial position check: Ensure that the initial position of the steel box girder is located at the starting end of the designated track. S2. Pushing the steel box girder: Place the steel box girder on the placement plate and use the guiding mechanism to push the steel box girder on the designated track. S3. Correction and adjustment: When the steel box girder shifts or its position needs to be adjusted, the correction component is activated to adjust the position of the steel box girder. S4. Inspection and acceptance: Confirm that the position, flatness, and quality of the steel box girder meet the design requirements.
[0014] The technical solution provided by the embodiments of the present invention has the following beneficial effects compared with the prior art: This invention provides a correction device and method for jacking large-span curved steel box girders. This device uses a correction component to position the steel box girder placed on a placement plate. When the steel box girder shifts or needs to be adjusted, it can correct or adjust the position of the steel box girder, thus improving the positioning accuracy of the steel box girder. Furthermore, the correction component is applicable to steel box girders of different specifications, improving the applicability of this device. This device has a drive assembly and a guide assembly on the top of the base plate. The drive assembly drives the placement plate to move along the direction of travel of the steel box girder, realizing the jacking of the steel box girder along the predetermined line. Two sets of support plates are symmetrically arranged at the bottom of the placement plate. Both sets of support plates are slidably connected to two guide rods through pulleys, which improves the stability of the placement plate movement during the jacking process, that is, improves the stability of the steel box girder movement during the jacking process, reduces the construction difficulty and labor intensity, and thus reduces costs. Attached Figure Description
[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a correction device for jacking large-span curved steel box girders according to an embodiment of the present invention. Figure 2 This is a schematic diagram showing the connection between the placement plate and the driving assembly according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the correction component described in an embodiment of the present invention; Figure 4 This is a schematic diagram of the correction mechanism described in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the guide component described in an embodiment of the present invention.
[0018] The components are as follows: 1. Base plate; 2. Mounting plate; 3. Guide rod; 4. Drive component; 5. Threaded hole; 6. Threaded rod; 7. Support plate; 8. Pulley; 9. Placement plate; 10. Telescopic rod; 11. Limiting rod; 12. Top plate; 13. Limiting plate; 13.1. Vertical plate; 13.2. Horizontal plate; 14. Threaded cylinder. Detailed Implementation
[0019] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.
[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.
[0021] Reference Figures 1 to 5 As shown, the first aspect of this embodiment provides a correction device for jacking long-span curved steel box girders, including a base plate 1, a correction mechanism, and a guide mechanism.
[0022] Among them, reference Figure 3 and Figure 4As shown, the correction mechanism includes a placement plate 9 and several correction components. In this embodiment, four sets of correction components are provided, which are evenly and symmetrically arranged on both sides of the placement plate 9. The placement plate 9 is used to support the steel box girder. The correction components include a telescopic rod 10, a limiting rod 11, a top plate 12, and a limiting plate 13. The limiting plate 13 includes a vertically connected vertical plate 13.1 and a horizontal plate 13.2. The horizontal plate 13.2 is connected to the placement plate 9. One end of the telescopic rod 10 is fixedly connected to the vertical plate 13.1, and the other end is connected to the top plate 12. The top plate 12 is perpendicularly connected to the horizontal plate 13.2. The telescopic rod 10 can drive the top plate 12 to move the horizontal plate 13.2. The top plate 12 moves perpendicular to the direction of travel of the steel box girder, thereby bringing the top plate 12 into contact with the steel box girder. The corresponding correction component clamps and pushes the steel box girder, thereby correcting or adjusting the steel box girder that has shifted or needs to be adjusted, thus constraining the travel path of the steel box girder. To prevent the top plate 12 from shifting when the telescopic rod 10 moves, two limiting rods 11 are provided. One end of the two limiting rods 11 is connected to the vertical plate 13.1, and the other end is movably set inside the top plate 12, so that the top plate 12 can move along the axial direction of the limiting rods 11, ensuring the stability of the movement of the top plate 12.
[0023] Furthermore, refer to Figure 1 and Figure 2 As shown, the drive assembly includes a drive component 4 and a threaded rod 6. The drive component 4 is a motor, and the threaded rod 6 is mounted on the base plate 1. A threaded cylinder 14 is located at the center of the bottom of the placement plate 9. The threaded cylinder 14 is threadedly connected to the threaded rod 6. The drive component 4 drives the threaded rod 6 to rotate, and the threaded cylinder 14 moves along the axial direction of the threaded rod 6. The axial direction of the threaded rod 6 is parallel to the traveling direction of the steel box girder. In other words, the motor drives the threaded rod 6 to rotate, and the rotational motion of the threaded rod 6 is converted into linear motion, so that the threaded cylinder 14 can move along the axial direction of the threaded rod 6. This causes the placement plate 9 to move along the axial direction of the threaded rod 6, thus enabling the placement plate 9 to drive the steel box girder to move along a predetermined path.
[0024] Among them, reference Figure 1 As shown, two mounting plates 2 are provided on the top of the base plate 1, and the driving component 4 is provided on the base plate 1. A threaded hole 5 is provided in the middle of the mounting plate 2 away from the driving component 4. One end of the threaded rod 6 is hinged to the output end of the driving component 4, and the other end is rotatably connected to the threaded hole 5.
[0025] Furthermore, refer to Figure 5As shown, the guide assembly includes two guide rods 3, the axes of which are parallel to the traveling direction of the steel box girder. The two ends of the guide rods 3 are connected to two mounting plates 2 respectively. Two sets of support plates are symmetrically arranged at the bottom of the placement plate 9. Each set of support plates includes two support plates 7. A pulley 8 is arranged between the two support plates 7, and the pulley 8 slides with the outer periphery of the guide rod 3. When the placement plate 9 moves along the axis of the threaded rod 6 under the drive of the drive member 4, the two pulleys 8 slide along the two guide rods 3 respectively, thereby improving the stability of the movement of the placement plate 9 and reducing the shaking and deformation during the jacking process.
[0026] In order to enable the steel box girder to move vertically, several mounting holes are provided at the bottom of the base plate 1. The mounting holes are used to connect the lifting mechanism. The lifting mechanism can adjust the height of the base plate 1, thereby realizing the installation and positioning of the steel box girder.
[0027] The second aspect of this embodiment provides a method for correcting the deviation of a long-span curved steel box girder during jacking, based on the aforementioned correction device for jacking long-span curved steel box girders, and includes the following steps: S1. Initial position check: Ensure that the initial position of the steel box girder is at the starting end of the designated track. Specifically, the direction of the designated track is the axial direction of the threaded rod 6. During the preparation stage, it is necessary to ensure that the threaded rod 6 is threadedly connected to the threaded cylinder 14 and that the pulley 8 at the bottom of the placement plate 9 is in sliding engagement with the corresponding guide rod 3. S2. Pushing the steel box girder: The steel box girder is placed on the placement plate 9, and the steel box girder is pushed on the designated track using the guide mechanism. Specifically, after all the components of this device are installed and adjusted, the steel box girder is placed on the placement plate 9. The four top plates 12 move along the axis of the limiting rod 11 under the drive of the telescopic rod 10 until the opposite top plates 12 clamp the steel box girder to position it. The driving component 4 drives the threaded rod 6 to rotate, and the threaded cylinder 14 moves along the axis of the threaded rod 6, so that the placement plate 9 moves along the axis of the threaded rod 6, thereby realizing the pushing of the steel box girder. S3. Correction and Adjustment: When the steel box girder shifts or its position needs to be adjusted, the correction component is activated to adjust its position. Specifically, when the steel box girder shifts or its position needs to be adjusted, the jacking is paused, and the telescopic rod 10 drives the top plate 12 to move along the axis of the limit rod 11. The two opposing top plates 12 can clamp the steel box girder and adjust its position to ensure the accuracy of the steel box girder's position. After the adjustment is completed, the jacking work is restarted to ensure that the correction is completed. S4. Inspection and acceptance: Confirm that the position, flatness, and quality of the steel box girder meet the design requirements.
[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0029] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.
Claims
1. A correction device for jacking long-span curved steel box girders, characterized in that, include: Base plate (1); The correction mechanism includes a placement plate (9) and several correction components. The several correction components are symmetrically arranged on both sides of the placement plate (9). The placement plate (9) is used to support the steel box girder. The correction components move in the direction perpendicular to the traveling direction of the steel box girder to constrain the traveling path of the steel box girder. The guiding mechanism is located on the top of the base plate (1). The guiding mechanism includes a driving component and a guiding component. The driving component is used to drive the placement plate (9) to move along the traveling direction of the steel box girder. The guiding component includes two guide rods (3). The axial directions of the two guide rods (3) are parallel to the traveling direction of the steel box girder. Two sets of support plates are symmetrically arranged at the bottom of the placement plate (9). The two sets of support plates are slidably connected to the two guide rods (3) respectively through pulleys (8).
2. The correction device for jacking long-span curved steel box girders according to claim 1, characterized in that, The correction component includes a limiting plate (13) and a jacking member. One end of the limiting plate (13) is connected to one end of the placement plate (9). The jacking member is disposed on the limiting plate (13) and moves in the direction perpendicular to the traveling direction of the steel box girder to contact the steel box girder.
3. The correction device for jacking long-span curved steel box girders according to claim 2, characterized in that, The jacking component includes a telescopic rod (10) and a top plate (12). The limiting plate (13) includes a vertically connected vertical plate (13.1) and a horizontal plate (13.2). The horizontal plate (13.2) is connected to the placement plate (9). One end of the telescopic rod (10) is connected to the vertical plate (13.1), and the other end of the telescopic rod (10) is connected to the top plate (12). The top plate (12) is used to contact the steel box girder. The top plate (12) is perpendicularly connected to the horizontal plate (13.2).
4. A correction device for jacking long-span curved steel box girders according to claim 3, characterized in that, The pusher also includes two limiting rods (11), one end of which is connected to the vertical plate (13.1), and the other end of which is movably disposed within the top plate (12).
5. A correction device for jacking long-span curved steel box girders according to claim 1, characterized in that, The driving assembly includes a driving component (4) and a threaded rod (6). The threaded rod (6) is disposed on the base plate (1). A threaded cylinder (14) is disposed at the center of the bottom of the placement plate (9). The threaded cylinder (14) is threadedly connected to the threaded rod (6). The driving component (4) drives the threaded rod (6) to rotate. The threaded cylinder (14) moves along the axial direction of the threaded rod (6). The axial direction of the threaded rod (6) is parallel to the travel direction of the steel box girder.
6. A correction device for jacking long-span curved steel box girders according to claim 5, characterized in that, The top of the base plate (1) is provided with two mounting plates (2), the driving component (4) is provided on the base plate (1), and the mounting plate (2) away from the driving component (4) has a threaded hole (5) in the middle. One end of the threaded rod (6) is hinged to the output end of the driving component (4), and the other end is rotatably connected to the threaded hole (5).
7. A correction device for jacking long-span curved steel box girders according to claim 6, characterized in that, The two ends of the guide rod (3) are respectively connected to the two mounting plates (2); Each set of support plates includes two support plates (7), and the pulley (8) is disposed between the two support plates (7), and the pulley (8) slides with the outer periphery of the guide rod (3).
8. A correction device for jacking long-span curved steel box girders according to claim 1, characterized in that, The bottom of the base plate (1) has several mounting holes for connecting the lifting mechanism.
9. A method for correcting deviation during the jacking of long-span curved steel box girders, comprising a deviation correction device for jacking long-span curved steel box girders as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Initial position check: Ensure that the initial position of the steel box girder is located at the starting end of the designated track. S2. Pushing the steel box girder: Place the steel box girder on the placement plate (9) and use the guide mechanism to push the steel box girder on the designated track. S3. Correction and adjustment: When the steel box girder shifts or its position needs to be adjusted, the correction component is activated to adjust the position of the steel box girder. S4. Inspection and acceptance: Confirm that the position, flatness, and quality of the steel box girder meet the design requirements.