Auxiliary device for butt joint and assembly of transition section box culvert

Through the three-axis mobile module and servo motor-driven docking assembly components, combined with multi-dimensional measurement tools, the problem of insufficient accuracy in traditional box culvert docking is solved, and efficient and accurate box culvert docking is achieved.

CN223480623UActive Publication Date: 2025-10-28SINOHYDRO ENG BUREAU 4
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Patent Information

Application Number
CN202423159145.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-10-28
Estimated Expiration
2034-12-20

AI Technical Summary

Technical Problem

Traditional box culvert docking construction relies on manual operation, resulting in the docking accuracy being affected by the experience and technical level of the construction workers. Especially in harsh environments, it is difficult to ensure the alignment effect and there is a risk of human error.

Method used

The three-axis mobile module and servo motor-driven docking assembly components are combined with a flatness measurement mainboard, a bubble level and an L-shaped side vertical measuring ruler to achieve automated docking and multi-dimensional measurement of the box culvert, ensuring docking accuracy.

Benefits of technology

It achieves seamless docking of box culvert interfaces, avoids leakage and structural instability, improves docking accuracy and construction efficiency, and reduces human errors.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a transition section box culvert butt joint assembly auxiliary device, and belongs to the technical field of transition section box culvert butt joint. The butt joint assembly assembly is arranged on a movable free terminal of the three-axis moving module. The butt joint assembly assembly comprises a reverse U-shaped hoisting plate fixed to the terminal of the three-axis moving module, a double-thread screw transversely and rotationally installed in the U-shaped hoisting plate, two splicing clamping plates symmetrically penetrating through the double-thread screw in a threaded mode, a first box culvert and a second box culvert, wherein the first box culvert and the second box culvert are clamped between the two splicing clamping plates and are in a spliced state. The two splicing clamping plates centripetally clamp the first box culvert and are spliced with the second box culvert through position adjustment of the three-axis moving module, and a flatness measuring main board is installed on the upper portion of the inner wall of each splicing clamping plate. Seamless joint of box culvert joints is ensured through multi-dimensional measurement, and the problem of leakage or unstable structure caused by poor flatness is avoided.
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Description

Technical Field

[0001] This utility model belongs to the field of gradually changing section box culvert docking technology, and in particular, it is an auxiliary device for docking and assembling gradually changing section box culverts. Background Technology

[0002] In traditional box culvert assembly construction, manual or semi-automated methods are typically used. Specifically, construction workers need to manually adjust the position of the box culverts, use simple tools (such as cranes and jacks) to align the first and second box culverts, and then fix them together by welding, bolting, or other methods. While this traditional method can accomplish the basic assembly task, it has many problems and limitations in practical applications.

[0003] Because it relies on manual operation, the experience and skill level of the construction workers directly affect the alignment accuracy. Even experienced workers cannot guarantee that the ideal alignment effect can be achieved every time, especially during long-term operations or in harsh environments, where human error is difficult to avoid. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for the docking and assembly of gradually changing box culverts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary device for the docking and assembly of a gradually changing section box culvert, comprising:

[0006] The three-axis moving module is erected across the ground on both sides of the pit where the box culvert needs to be laid.

[0007] The docking assembly is set on the movable free end of the three-axis moving module and can be driven and adjusted by the three-axis moving module. The docking assembly includes a U-shaped lifting plate fixed to the end of the three-axis moving module and in the reverse position, a double-headed screw installed laterally inside the U-shaped lifting plate, two splicing clamping plates with symmetrical threads passing through the double-headed screw, and a first box culvert and a second box culvert clamped between the two splicing clamping plates in a spliced ​​state.

[0008] The U-shaped hoisting plate has a servo motor installed on one outer wall to drive a double-headed screw to rotate. The servo motor drives two splicing clamping plates to move synchronously in the center or opposite directions. The two splicing clamping plates clamp the first box culvert in the center and are spliced ​​with the second box culvert by adjusting the position of the three-axis moving module. A flatness measuring main board is installed on the upper part of the inner wall of each splicing clamping plate. The flatness measuring main board is pressed horizontally down on the top surface of the first box culvert. Extended measuring main boards are connected to both sides of the flatness measuring main board. The extended measuring main boards are pressed horizontally down on the top surface of the second box culvert.

[0009] In this preferred embodiment, a bubble level is installed on the top surface of each of the extended measuring motherboards, and the bubble level measures the flatness of the joint between the first box culvert and the second box culvert.

[0010] In this preferred embodiment, the two ends of the double-ended screw are provided with external threaded paths with opposite thread directions, and the two external threaded paths are respectively threadedly connected to the splicing clamping plate.

[0011] In this preferred embodiment, each of the extended measuring motherboards has an internal insertion interface, and an L-shaped side vertical measuring ruler is inserted through each insertion interface. The longitudinal inner wall of the L-shaped side vertical measuring ruler is attached to the outer wall of the second box culvert and is used to measure the longitudinal verticality of the outer wall of the second box culvert.

[0012] In this preferred embodiment, the L-shaped side vertical measuring ruler has scale lines marked on the top surface of the extended measuring main board. The scale lines are used to view the dimensions passing through the extended measuring main board. Each extended measuring main board has a locking screw connected to one end of its outer wall. The locking screw passes through the insertion interface and locks the L-shaped side vertical measuring ruler.

[0013] In this preferred embodiment, each of the flatness measuring main boards is integrally connected to a connecting ear plate at its upper tail end. The connecting ear plates are fixedly connected to the splicing clamping plate by bolts, and the bottom surface of the flatness measuring main board is attached to the top surface of the first box culvert.

[0014] In this preferred embodiment, each of the splicing clamping plates has an anti-slip pad layer on the lower inner wall, which is in frictional clamping contact with the outer wall of the first box culvert. The lower inner wall of each splicing clamping plate has multiple adjusting screw holes at equal intervals for adjusting the installation height of the flatness measuring main board.

[0015] In a preferred embodiment, the three-axis moving module includes four support columns arranged in a rectangular pattern, Y-axis guide rails fixed to the top surfaces of two adjacent support columns, X-axis guide rails slidably mounted between the top surfaces of the two Y-axis guide rails, U-shaped sliders slidably connected to the periphery of the X-axis guide rails, and hydraulic lifting cylinders fixed to the bottom surface of the U-shaped sliders.

[0016] In a preferred embodiment, the inner wall of the U-shaped slider component is integrally formed with an internally threaded slider, which is connected to the lead screw thread inside the X-axis guide rail, and the bottom piston rod lifting end of the hydraulic lifting cylinder component is fixedly connected to the top surface of the U-shaped lifting plate.

[0017] In this preferred embodiment, each of the splicing clamping plates has a threaded hole through which the double-ended screw passes. When the servo motor drives the double-ended screw to rotate, the external thread tooth path causes the two splicing clamping plates to move relative to each other, resulting in rolling friction between the positioning steel ball and the inner top wall of the U-shaped lifting plate.

[0018] Compared with the prior art, the technical effects and advantages of this utility model are:

[0019] The auxiliary device for the docking and assembly of the gradually changing section box culvert.

[0020] The combined use of the flatness measuring main board and the extended measuring main board enables real-time monitoring of the top surface flatness of the first and second box culverts during the splicing process. Combined with a bubble level, it allows for a direct assessment of whether the joints are level. This multi-dimensional measurement ensures a seamless connection at the box culvert joints, preventing leakage or structural instability caused by poor flatness. The L-shaped side verticality measuring ruler is used to measure the verticality of the outer wall of the second box culvert, ensuring its correct installation angle. The graduated markings allow construction personnel to accurately read the measured values, further improving the splicing accuracy.

[0021] The servo motor-driven double-headed screw design enables automated control of the splicing clamping plate. Through the precise rotation of the servo motor, the splicing clamping plates can move synchronously in either the center or opposite directions, ensuring a uniform distribution of clamping force and avoiding the uneven clamping that can occur with traditional manual adjustments. Furthermore, the servo motor's fast response speed and high control precision allow it to quickly adapt to different box culvert specifications, improving construction flexibility and efficiency. Attached Figure Description

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the splicing structure of the first and second box culverts of this utility model;

[0025] Figure 3 This is a schematic diagram of the installation structure of the flatness measurement motherboard of this utility model;

[0026] Figure 4 This is a schematic diagram of the disassembly structure of the L-shaped side vertical measuring ruler of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the diagram: 1. Three-axis moving module; 2. Docking assembly assembly; 3. Support column; 4. Y-axis guide rail; 5. X-axis guide rail; 6. U-shaped slider; 7. Hydraulic lifting cylinder; 8. U-shaped lifting plate; 9. Support base; 10. Double-ended screw; 11. Internal thread slider; 12. Servo motor; 13. External thread; 14. Splicing clamping plate; 15. First box culvert; 16. Second box culvert; 17. Flatness measuring main board; 18. Extension measuring main board; 19. Positioning steel ball; 20. Threaded hole; 21. Adjusting screw hole; 22. Anti-slip pad; 23. Connecting ear plate; 24. Bubble level; 25. Plug interface; 26. L-shaped side vertical measuring ruler; 27. Scale line; 28. Locking screw; 29. ​​Mounting hole. Detailed Implementation

[0029] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0030] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside shown in the figures of the present invention, and are explained here together.

[0031] This embodiment provides, for example Figures 1 to 4 The illustrated auxiliary device for docking and assembling a gradually changing section box culvert includes: a three-axis moving module 1 and a docking and assembly component 2.

[0032] In this embodiment, the three-axis moving module 1 is erected across the ground on both sides of the pit where the box culvert is to be laid; the docking assembly 2 is set on the movable free end of the three-axis moving module 1 and can be driven and adjusted by the three-axis moving module 1. The docking assembly 2 includes a U-shaped lifting plate 8 fixed to the end of the three-axis moving module 1 and in the reverse position, a double-headed screw 10 that is laterally rotatably installed inside the U-shaped lifting plate 8, two splicing clamping plates 14 with symmetrical threads passing through the double-headed screw 10, and a first box culvert 15 and a second box culvert 16 in the splicing state clamped between the two splicing clamping plates 14.

[0033] In this embodiment, a servo motor 12 is installed on one outer wall of the U-shaped hoisting plate 8 to drive the double-headed screw 10 to rotate. The servo motor 12 drives the two splicing clamping plates 14 to move synchronously in the center or opposite directions. The two splicing clamping plates 14 clamp the first box culvert 15 in the center and are spliced ​​with the second box culvert 16 by adjusting the position of the three-axis moving module 1. A flatness measuring main board 17 is installed on the upper part of the inner wall of each splicing clamping plate 14. The flatness measuring main board 17 is pressed horizontally down on the top surface of the first box culvert 15. Both sides of the flatness measuring main board 17 are connected to the extension measuring main board 18. The extension measuring main board 18 is pressed horizontally down on the top surface of the second box culvert 16.

[0034] In this embodiment, a bubble level 24 is installed on the top surface of each extension measurement main board 18. The bubble level 24 measures the flatness of the joint between the first box culvert 15 and the second box culvert 16. The bubble level 24 is installed on the extension measurement main board 18 to visually check the flatness of the joint between the first box culvert 15 and the second box culvert 16.

[0035] In this embodiment, the two ends of the double-ended screw 10 are provided with external threaded passages 13 with opposite thread directions. The two external threaded passages 13 are respectively threadedly connected to the splicing clamping plate 14. The splicing clamping plate 14 directly contacts and clamps the first box culvert 15 and the second box culvert 16, ensuring that the two remain relatively stationary during the docking process. The flatness measuring main plate 17 is used to detect the flatness of the top surface of the first box culvert 15 to ensure that the top of the box culvert is level. The extended measuring main plate 18 extends from both sides of the flatness measuring main plate 17 to measure the flatness of the top surface of the second box culvert 16, assisting in determining whether the two box culverts are correctly docked.

[0036] In this embodiment, each extended measuring main board 18 has an internal insertion interface 25, and an L-shaped side vertical measuring ruler 26 is inserted through each insertion interface 25. The longitudinal inner wall of the L-shaped side vertical measuring ruler 26 is attached to the outer wall of the second box culvert 16 to measure the longitudinal verticality of the outer wall of the second box culvert 16. The L-shaped side vertical measuring ruler 26 is used to measure the verticality of the outer wall of the second box culvert 16 to ensure that the box culvert is installed at the correct angle.

[0037] In this embodiment, an L-shaped side vertical measuring ruler 26 is marked with scale lines 27 on the top surface of the extended measuring main board 18. The scale lines 27 are used to view the dimensions passing through the extended measuring main board 18. A locking screw 28 is connected to one end of the outer wall of each extended measuring main board 18. The locking screw 28 passes through the insertion interface 25 and locks the L-shaped side vertical measuring ruler 26. The outer wall of the extended measuring main board 18 has mounting holes 29 for connecting the locking screw 28.

[0038] In this embodiment, each flatness measuring main board 17 is integrally connected to a connecting ear plate 23 at the upper end of its tail. The connecting ear plates 23 are fixedly connected to the splicing clamping plate 14 by bolts. The bottom surface of the flatness measuring main board 17 is attached to the top surface of the first box culvert 15.

[0039] In this embodiment, each splicing clamping plate 14 has an anti-slip pad 22 on the lower part of its inner wall. The anti-slip pad 22 is in frictional clamping contact with the outer wall of the first box culvert 15. The lower part of the inner wall of the splicing clamping plate 14 has multiple adjusting screw holes 21 at equal intervals to adjust the installation height position of the flatness measuring main board 17.

[0040] In this embodiment, the three-axis moving module 1 includes four supporting columns 3 arranged in a rectangular pattern, Y-axis guide rails 4 fixed to the top surfaces of two adjacent supporting columns 3, X-axis guide rails 5 slidably mounted between the tops of the two Y-axis guide rails 4, U-shaped sliders 6 slidably connected to the periphery of the X-axis guide rails 5, and hydraulic lifting cylinders 7 fixed to the bottom surface of the U-shaped sliders 6. The hydraulic lifting cylinders 7 provide vertical lifting force to adjust the height of the U-shaped lifting plate 8, meeting the docking requirements of box culverts at different heights.

[0041] In this embodiment, the inner wall of the U-shaped slider 6 is integrally formed with an internally threaded slider 11, which is threadedly connected to the lead screw inside the X-axis guide rail 5. The bottom piston rod lifting end of the hydraulic lifting cylinder 7 is fixedly connected to the top surface of the U-shaped lifting plate 8. The U-shaped slider 6 is threadedly connected to the lead screw inside the X-axis guide rail 5 through the internally threaded slider 11, allowing it to slide on the X-axis guide rail 5 and simultaneously supporting the up-and-down movement of the hydraulic lifting cylinder 7.

[0042] In this embodiment, each splicing clamping plate 14 is provided with a threaded hole 20 for the double-ended screw 10 to pass through. When the servo motor 12 drives the double-ended screw 10 to rotate, the external thread tooth path 13 drives the two splicing clamping plates 14 to move relative to each other, so that the positioning steel ball 19 rolls and rubs against the inner top wall of the U-shaped lifting plate 8.

[0043] Working principle:

[0044] The auxiliary device for assembling and connecting the box culvert section involves setting up a three-axis moving module 1 on the ground on both sides of the pit where the box culvert will be laid. This ensures that the supporting columns 3 are securely installed on the supporting base 9, and that the Y-axis guide rail 4 and X-axis guide rail 5 are correctly installed, forming a three-dimensional moving platform.

[0045] The first box culvert 15 is placed in the predetermined position, and the U-shaped lifting plate 8 is moved above the first box culvert 15 using the three-axis moving module 1. At this time, the U-shaped slider 6 slides along the X-axis guide rail 5, and the hydraulic lifting cylinder 7 adjusts the height to ensure that the U-shaped lifting plate 8 is accurately aligned with the first box culvert 15. The flatness of the top surface of the second box culvert 16 is checked using a bubble level 24, and the height of the main plate 17 is measured by adjusting the flatness through the adjusting screw hole 21 to ensure that the top surface of the first box culvert 15 is completely level. At the same time, the verticality of the outer wall of the second box culvert 16 is measured using an L-shaped side vertical measuring ruler 26 to ensure that its installation angle is correct. The servo motor 12 is started to drive the double-headed screw 10 to rotate. Since the two ends of the double-headed screw 10 have external thread teeth 13 with opposite thread directions, the two splicing clamping plates 14 will move concentrically and gradually approach the first box culvert 15.

[0046] When the splicing clamping plate 14 contacts the first box culvert 15, continue rotating the double-ended screw 10 to ensure that the anti-slip pad layer 22 is in close contact with the outer wall of the first box culvert 15, ensuring a firm clamping. At this time, the positioning steel ball 19 rolls inside the U-shaped lifting plate 8, reducing frictional resistance and ensuring a smooth clamping process. The flatness measuring main plate 17 is fixed to the splicing clamping plate 14 by the connecting ear plate 23 to ensure that the measuring tool will not fall off. At the same time, the bubble level 24 and the L-shaped side vertical measuring ruler 26 are checked again to confirm that the position of the first box culvert 15 is correct.

[0047] The first box culvert 15 is transported to the designated position, ready to dock with the second box culvert 16. At this point, the three-axis movement module 1 comes into play again, adjusting the U-shaped lifting plate 8 above the second box culvert 16 through precise X, Y, and Z axis movements. The servo motor 12 is activated, driving the double-headed screw 10 to rotate in the opposite direction, causing the two splicing clamping plates 14 to move back-to-back, making space for the second box culvert 16. Then, the U-shaped lifting plate 8 is slowly lowered, allowing the extended measuring main plate 18 to press horizontally down onto the top surface of the second box culvert 16. Using the fine-tuning function of the three-axis movement module 1, the position of the U-shaped lifting plate 8 is gradually adjusted to align the interface between the first box culvert 15 and the second box culvert 16. During this process, a bubble level 24 and an L-shaped side vertical measuring ruler 26 are used to monitor the flatness and verticality of both in real time to ensure docking accuracy.

[0048] Once the interfaces of the first box culvert 15 and the second box culvert 16 are fully aligned, the servo motor 12 is activated, driving the double-headed screw 10 to rotate centripetally again, causing the two splicing clamping plates 14 to gradually approach each other, ultimately clamping the first box culvert 15 and the second box culvert 16 tightly together. The L-shaped side vertical measuring ruler 26 is inserted through the insertion interface 25 and locked using the locking screw 28, ensuring the L-shaped side vertical measuring ruler 26 remains stable during measurement. Simultaneously, the height of the flatness measuring main board 17 is further adjusted by adjusting the screw hole 21, ensuring a seamless connection between the interfaces of the two box culverts.

[0049] Use a bubble level 24 to recheck the overall flatness of the first box culvert 15 and the second box culvert 16 after splicing, ensuring that the top surfaces are level. Use the scale 27 on the L-shaped side vertical measuring ruler 26 to check the verticality of the outer wall of the second box culvert 16, ensuring its installation angle is correct. After completing all measurements and adjustments, conduct a comprehensive quality acceptance test to ensure that the assembly of the transition section box culverts meets the design requirements and technical standards.

[0050] After confirming that the assembly of the transition section box culvert is qualified, the servo motor 12 is turned off, the splicing clamping plate 14 is released, and the U-shaped hoisting plate 8 is raised to a safe height. Subsequently, the three-axis moving module 1 and related components are disassembled, and the site is cleaned up.

[0051] It should be noted that, in this document, relational terms such as "one" and "two" 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, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for the docking and assembly of a gradually changing section box culvert, characterized in that, include: The three-axis moving module (1) is erected across the ground on both sides of the pit where the box culvert needs to be laid; The docking assembly (2) is set on the movable free end of the three-axis moving module (1) and can be driven and adjusted by the three-axis moving module (1). The docking assembly (2) includes a U-shaped lifting plate (8) fixed to the end of the three-axis moving module (1) and in the reverse position, a double-headed screw (10) installed laterally inside the U-shaped lifting plate (8), two splicing clamping plates (14) with symmetrical threads passing through the double-headed screw (10), and a first box culvert (15) and a second box culvert (16) clamped between the two splicing clamping plates (14) in a splicing state. Among them, a servo motor (12) for driving the double-headed screw (10) to rotate is installed on one side of the outer wall of the U-shaped hoisting plate (8). The servo motor (12) drives the two splicing clamping plates (14) to move synchronously in the center or opposite directions. A flatness measuring main board (17) is installed on the upper part of the inner wall of each splicing clamping plate (14). The flatness measuring main board (17) is pressed horizontally down on the top surface of the first box culvert (15). An extension measuring main board (18) is connected to both sides of the flatness measuring main board (17). The extension measuring main board (18) is pressed horizontally down on the top surface of the second box culvert (16).

2. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 1, characterized in that: Each of the extended measuring mainboards (18) is equipped with a bubble level (24) on its top surface, and the bubble level (24) measures the flatness of the joint between the first box culvert (15) and the second box culvert (16).

3. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 2, characterized in that: The two ends of the double-ended screw (10) are provided with external threaded passages (13) with opposite thread directions, and the two external threaded passages (13) are respectively threaded to the splicing clamping plate (14).

4. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 3, characterized in that: Each of the extended measuring motherboards (18) has an interface (25) inside, and an L-shaped side vertical measuring ruler (26) is inserted through each interface (25). The longitudinal inner wall of the L-shaped side vertical measuring ruler (26) is attached to the outer wall of the second box culvert (16) and is used to measure the longitudinal verticality of the outer wall of the second box culvert (16).

5. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 4, characterized in that: The L-shaped side vertical measuring ruler (26) is marked with scale lines (27) on the top surface of the extended measuring main board (18). The scale lines (27) are used to view the dimensions passing through the extended measuring main board (18). Each of the extended measuring mainboards (18) has a locking screw (28) attached to one end of its outer wall. The locking screw (28) passes through the connector (25) and locks the L-shaped side vertical measuring ruler (26).

6. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 5, characterized in that: Each of the flatness measuring main board (17) has a connecting ear plate (23) integrally connected to the upper part of its tail end. The connecting ear plate (23) is fixedly connected to the splicing clamping plate (14) by bolts. The bottom surface of the flatness measuring main board (17) is attached to the top surface of the first box culvert (15).

7. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 6, characterized in that: Each of the splicing clamping plates (14) is provided with an anti-slip pad (22) on the lower part of its inner wall, and the anti-slip pad (22) is in frictional clamping contact with the outer wall of the first box culvert (15). The lower inner wall of the splicing clamping plate (14) is provided with multiple adjusting screw holes (21) at equal intervals to adjust the installation height of the flatness measuring main board (17).

8. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 7, characterized in that: The three-axis moving module (1) includes four support columns (3) arranged in a rectangular pattern, Y-axis guide rails (4) fixed to the top surfaces of two adjacent support columns (3), X-axis guide rails (5) slidably installed between the top surfaces of the two Y-axis guide rails (4), U-shaped sliders (6) slidably connected to the periphery of the X-axis guide rails (5), and hydraulic lifting cylinders (7) fixed to the bottom surface of the U-shaped sliders (6).

9. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 8, characterized in that: The inner wall of the U-shaped slider (6) is integrally formed with an internal thread slider (11), which is connected to the lead screw thread inside the X-axis guide rail (5). The bottom piston rod lifting end of the hydraulic lifting cylinder (7) is fixedly connected to the top surface of the U-shaped lifting plate (8).

10. The auxiliary device for connecting and assembling a gradually changing section box culvert according to claim 9, characterized in that: Each of the splicing clamping plates (14) is provided with a threaded hole (20) through which the double-headed screw (10) passes.