A method for fine-tuning and positioning of spatial irregular curved surface arch rib segments

Abstract

This invention discloses a method for fine-tuning and positioning spatial irregular curved surface arch rib segments. The method includes setting an adjusting toothed plate above the support column of a jig, laying and positioning the irregular curved surface base plate on the jig, placing the positioning device on the jig, hoisting the curved arch rib wall panel, and adjusting the hydraulic components to complete the assembly steps of the irregular curved surface arch rib. The positioning device of this invention can adapt to arch rib wall panels with different inclination angles and fit different irregular curved surfaces, providing an effective solution for positioning similar spatial irregular curved surface arch rib structures. During installation, it can accurately position the spatial orientation of the wall panel and precisely position it with adjacent wall panels between ring openings, ensuring accurate ring opening matching. By adjusting the hydraulic components to obtain a reasonable installation inclination angle, it ensures the precise alignment of the spatial irregular curved surface wall panel. The semi-automatic adjustment device reduces manual operation, ensures operational safety, and greatly improves installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel structure bridge construction technology, and more specifically, to a method for fine-tuning and positioning spatial irregular curved surface arch rib segments. Background Technology

[0002] Tied-arch bridges with mid-span structures are generally designed using BIM. The cross-section of the arch ribs varies considerably, and there is a lot of use of spatial irregular curved surface structures, making construction technically challenging. One of the technical difficulties lies in the precise positioning of the arch rib wall panels during the segmental assembly process. Since the fine-tuning and positioning of the segments involves the precise closure of the rings during installation, there are no similar construction methods for spatial irregular curved surface arch ribs to refer to. Traditional installation methods mainly rely on manual hoists and screw hooks for fine-tuning and positioning, which consumes a lot of physical labor, does not meet the installation requirements, and is inefficient. Summary of the Invention

[0003] In view of the above-mentioned defects and problems of the prior art, the technical problem to be solved by the present invention is to provide a method for fine-tuning and positioning of spatial irregular curved surface arch rib segments.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for fine-tuning and positioning of a spatial irregular curved surface arch rib segment includes the following steps:

[0006] Step 1: Design an irregular curved surface assembly jig made of ordinary I-beams based on the spatial irregular curved surface shape of the arch rib bottom plate. The fitted surface at the top of the jig must conform to the arch rib structure line.

[0007] Step 2: Install adjusting teeth plates above the support columns of the jig. The support columns are equipped with horizontal connections and diagonal braces. The adjusting teeth plates adopt a double-tooth plate structure. Compared with the traditional single-tooth plate, this method facilitates secondary adjustment at local single points, avoids the phenomenon of support points being suspended, which leads to local settlement after the structure is completed, and improves the fitting accuracy. Lay the irregular curved surface base plate on the jig and establish a local control coordinate system. Use a total station to locate the basic control points.

[0008] Step 3: For points that cannot be measured or controlled by instruments, draw the ground sample lines and ground sample control points using a coordinate system to roughly locate the spatial irregular curved base plate unit;

[0009] Step 4: After completing the positioning of the irregular curved surface base plate unit, place the positioning device on the jig.

[0010] Step 5: Hoist the curved arch rib panel and place it on the positioning device. After confirming that there is no misalignment between the arch rib panel and the base plate, adjust the hydraulic components. Adjust the spatial position of the arch rib panel by adjusting the vertical, horizontal and tilt angle control methods to complete the assembly of the irregular curved arch rib.

[0011] Step 5: After the irregular curved surface arch rib is assembled, measure the corner coordinates of each segment's ring opening on the jig. Compare the designed alignment with the actual alignment after on-site assembly and welding. Calculate the actual deviation during assembly based on the designed monitoring points. The actual deviation is generally elevation error and angle error. Elevation can be controlled by adjusting the height of the toothed plate of the curved surface jig. In some areas, hydraulic adjustment components can be used for jacking or manual hoist tensioning control. After adjustment, rigid welding is used with the curved surface jig to prevent further deformation. The angle error adjustment of the inclined curved wall panel can be achieved by setting a multi-point adjustment device. This device has precise scale readings and can be finely adjusted by the extension length and tilt angle of the hydraulic rod, ensuring accurate and efficient adjustment.

[0012] In the above technical solution, the method for determining that the wall panel and the bottom plate are not misaligned is to use a straightedge or a string line.

[0013] In the above technical solution, before adjusting the hydraulic components in step five, a prism is welded on the control point of the wall panel, and a measuring device is used for measurement, including a total station.

[0014] In the above technical solution, the positioning device includes a jig, a seat plate, a sliding oil groove, a fixed support, a sliding support, a hydraulic assembly, a wall panel fitting block, and a tilting hydraulic assembly locking device. The seat plate is mounted on the jig, and the fixed support and sliding support are mounted on the seat plate. A sliding oil groove is provided on the upper part of the seat plate. The hydraulic assembly is hinged to the fixed support via a single lifting lug and a double lifting lug. The hydraulic assembly includes a vertical hydraulic assembly, a horizontal hydraulic assembly, and a tilting hydraulic assembly. A tilting hydraulic assembly locking device is provided between the single lifting lug and the tilting hydraulic assembly. At the lifting end of the tilting hydraulic assembly, a double lifting lug is provided to connect with the wall panel fitting block. The sliding support is mounted on the sliding oil groove.

[0015] The above technical solution also includes a weld seam code plate, which is used in conjunction with a jack and is connected to the arch rib wall plate.

[0016] In the above technical solution, an L-shaped fitting limit block is provided on the upper part of the wall panel fitting block, and an L-shaped fitting limit block is provided on the lower part of the arch rib wall panel. The two interlock during installation.

[0017] The positioning device of this invention can adapt to arch rib panels with different inclination angles and fit different irregular curved surfaces, providing an effective solution for positioning similar spatial irregular curved surface arch rib structures. During installation, it can accurately position the spatial posture of the panel and accurately position it with adjacent panels between the rings, ensuring accurate ring matching. By adjusting the hydraulic components, a reasonable installation inclination angle can be obtained, ensuring accurate alignment of the spatial irregular curved surface panel. The semi-automatic adjustment device reduces manual operation, ensures operational safety, and greatly improves installation efficiency. Attached Figure Description

[0018] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the base plate of the present invention;

[0021] Figure 3 This is a schematic diagram of the double lifting lugs of the present invention;

[0022] Figure 4 , 5 A schematic diagram of the staggered joint installation for application of this invention;

[0023] Figure 6 It features a double-ear slot.

[0024] The double-ear slot is mainly designed to accommodate lifting base plates with varying degrees of torsion. During lifting, the contact surface between the lifting plane and the base plate will have different angles, affecting the adjustment accuracy. A strip-shaped limiting block is welded to the bottom of the base plate, interlocking with the lifting ear slot. The double lifting ears primarily function to accommodate different angles of rotation and lock with the hydraulic rod. Compared to traditional rigid welding methods, this design is simpler, more versatile, easier to disassemble, and convenient for movement in confined spaces, making it suitable for lifting curved surfaces with various angles.

[0025] In the diagram: 1 is the jig frame, 2 is the seat plate, 3 is the sliding oil groove, 4 is the fixed support, 5 is the sliding support, 6 is the tilting hydraulic assembly, 7 is the horizontal hydraulic assembly, 8 is the single lifting lug, 9 is the vertical hydraulic assembly, 9 is the elevation hydraulic assembly, 10 is the wall panel bonding block, 11 is the L-shaped limit block, 12 is the weld seam plate, 13 and 14 are the arch rib wall panels, 15 is the limit stop block, 16 and 16-1 are the tilting hydraulic assembly locking device, 17 is the double lifting lug slot, 18 is the double lifting lug, and 19 is the support column. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "seat plate," "fixed support," "sliding support," "hydraulic component," "lifting lug," and "limiting block," etc., should be interpreted broadly. For example, they can refer to being fixedly connected or installed, detachably connected or installed, or integrally connected or installed. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0028] In the description of this invention, it should be understood that the terms "upper part", "lower part", "above", "below", "vertical", "horizontal", "tilt", "connection", "movement", "lifting", "positioning", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] according to Figures 1-6 As shown in the example, a method for fine-tuning and positioning a spatial irregular curved surface arch rib segment includes the following steps:

[0030] Step 1: Design a jig for ordinary I-beams based on the spatial irregular curved surface shape of the arch rib base plate. The fitted surface at the top of the jig must conform to the arch rib structure line.

[0031] Step 2: Install adjusting teeth plates above the support columns of the jig. The support columns are equipped with horizontal connections and diagonal braces. The adjusting teeth plates adopt a double-tooth plate structure. Compared with the traditional single-tooth plate, this method facilitates secondary adjustment at local single points, avoids the phenomenon of support points being suspended, which leads to local settlement after the structure is completed, and improves the fitting accuracy. Lay the irregular curved surface base plate on the jig and establish a local control coordinate system. Use a total station to locate the basic control points.

[0032] Step 3: For points that cannot be measured or controlled by instruments, draw the ground sample line and ground sample control points using a coordinate system to roughly locate the spatial irregular curved base plate unit and complete the coarse adjustment positioning.

[0033] Step 4: After completing the positioning of the irregular curved surface base plate unit, place the positioning device on the jig.

[0034] Step 5: Hoist the curved arch rib panel and place it on the positioning device. After confirming that there is no misalignment between the arch rib panel and the base plate using a straightedge or string line, complete the fine-tuning positioning. Before adjusting the hydraulic components, weld prisms to the control points of the panel and use measuring equipment such as a total station to measure. Adjust the spatial position of the arch rib panel in the tilt, horizontal and vertical directions by adjusting the tilt, horizontal and vertical hydraulic components to complete the final positioning and assemble the irregular curved arch rib.

[0035] Step Six: After the irregular curved surface arch rib is assembled, measure the corner coordinates of each segment ring on the jig. Compare the designed alignment with the actual alignment after on-site assembly and welding, and calculate the actual deviation during assembly based on the designed monitoring points.

[0036] The positioning device includes a jig, a seat plate, a sliding oil groove, a fixed support, a weld seam plate, a sliding support, a hydraulic assembly, a wall panel fitting block, and a tilting hydraulic assembly locking device. The seat plate is set on a rigid jig, and an adjusting toothed plate is set above the support column of the jig as an auxiliary measure for the fine-tuning process. The fixed support and the sliding support are set on the seat plate, and the connection between the fixed support and the seat plate is bolted. A sliding oil groove is set on the upper part of the seat plate, and the sliding support is set on the sliding oil groove to restrict the two degrees of freedom, allowing it to move horizontally in one direction, and to complete a series of fine-tuning actions in conjunction with the hydraulic assembly. The hydraulic components are hinged to the fixed supports via single and double lifting lugs. The hydraulic components include vertical, horizontal, and tilting hydraulic components. A tilting hydraulic component locking device is installed between the single lifting lug and the tilting hydraulic component to complete the positioning and locking work. The tilting hydraulic component locking device locks the final position and, together with the weld seam clamp, secures the weld, ultimately completing the fine adjustment of the spatial irregular curved surface arch rib segment. At the lifting end of the tilting hydraulic component, the double lifting lugs are bolted to the wall panel fitting block, forming an integrated control mechanism with the hydraulic component to complete the positioning work. The weld seam clamp is used in conjunction with the jack as a supplementary measure for the fine adjustment and positioning of the spatial irregular curved surface. Various styles of weld seam clamps are used to finely adjust and position different curved surface structures and misaligned edges at different locations. The upper part of the wall panel bonding block is equipped with an L-shaped bonding limit block, and similarly, the lower part of the arch rib wall panel is equipped with an L-shaped bonding limit block. The two interlock during installation and move with the hydraulic components during fine-tuning and positioning. This ensures that the adjustment of the vertical hydraulic components, horizontal hydraulic components, and tilting hydraulic components is fully reflected in the spatial movement of the curved wall panel, preventing free sliding or inaccurate positioning.

[0037] This invention relates to a method for fine-tuning and positioning of spatial irregular curved surface arch rib segments. The application fields include, but are not limited to, spatial irregular curved surface arch ribs. It can be widely applied to box beams with irregular curved surfaces and is suitable for structures with large cross-sectional variations, such as irregular curved surfaces, large-angle wall panel installation, and the assembly of polygonal box beams.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for fine-tuning and positioning a spatial irregular curved surface arch rib segment, characterized in that: The steps include: Step 1: Design a jig for preparing ordinary I-beams based on the spatial irregular curved surface shape of the arch rib base plate; Step 2: Install adjusting teeth plates above the support columns of the jig, lay the irregular curved surface base plate on the jig, establish a local control coordinate system, and locate the basic control points using a total station; Step 3: For points that cannot be measured or controlled by instruments, draw the ground sample lines and ground sample control points using a coordinate system to roughly locate the spatial irregular curved surface base plate unit; Step 4: After completing the positioning of the irregular curved surface base plate unit, place the positioning device on the jig. Step 5: Hoist the curved arch rib panel and place it on the positioning device. After confirming that there is no misalignment between the arch rib panel and the base plate, adjust the hydraulic components. Adjust the spatial position of the arch rib panel by adjusting the vertical, horizontal and tilt angle control methods to complete the assembly of the irregular curved arch rib. Step 5: After the irregular curved surface arch rib is assembled, measure the corner coordinates of each segment's ring opening on the jig. Compare the designed alignment with the actual alignment after on-site assembly and welding. Calculate the actual deviation during assembly based on the designed monitoring points. The actual deviation consists of elevation error and angle error. The elevation is controlled by adjusting the height of the toothed plate of the curved surface jig, and locally using hydraulic adjustment components for jacking or manual hoist tensioning control. After adjustment, rigidly weld it to the curved surface jig to prevent further deformation. The angle error adjustment of the inclined curved wall panel is achieved using a multi-point adjustment device with precise scale readings. Fine adjustments are made by adjusting the extension length and tilt angle of the hydraulic rod to ensure accurate and efficient adjustment. The positioning device includes a jig, a seat plate, a sliding oil groove, a fixed support, a sliding support, a hydraulic component, a wall panel fitting block, and an angle hydraulic component locking device. The seat plate is set on the jig, the fixed support and the sliding support are set on the seat plate, and a sliding oil groove is set on the upper part of the seat plate. The single lifting lug is fixed to the base plate by a fixed support; the hydraulic assembly includes a vertical hydraulic assembly, a horizontal hydraulic assembly, and an inclined hydraulic assembly. The single lifting lug is hinged to the inclined hydraulic assembly and is equipped with an inclined hydraulic assembly locking device. A double lifting lug is hinged to the lifting end of the inclined hydraulic assembly, and the double lifting lug is connected to the wall panel fitting block; the two ends of the horizontal hydraulic assembly are respectively connected to a fixed support and a sliding support, and the sliding support is set on a sliding oil groove; one end of the vertical hydraulic assembly is connected to the base plate, and the other end is connected to the arch rib wall panel through the inclined hydraulic assembly locking device and the double lifting lug slot.

2. The method for fine-tuning and positioning of spatial irregular curved surface arch rib segments according to claim 1, characterized in that: The method for determining that the wall panel and the base plate are not misaligned is to use a straightedge or a string line.

3. A method for fine-tuning and positioning a spatial irregular curved surface arch rib segment according to claim 1 or 2, characterized in that: Before adjusting the hydraulic components in step five, prisms are welded onto the control points of the wall panel, and measurements are taken using measuring equipment, including a total station.

4. The method for fine-tuning and positioning of a spatial irregular curved surface arch rib segment according to claim 1, characterized in that: It also includes a weld seam plate, which is used in conjunction with a jack and is connected to the arch rib wall plate.

5. The method for fine-tuning and positioning of a spatial irregular curved surface arch rib segment according to claim 4, characterized in that: The upper part of the wall panel bonding block is provided with an L-shaped bonding limit block, and the lower part of the arch rib wall panel is provided with an L-shaped bonding limit block. The two interlock during installation.

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