Square culvert pipeline repair construction system and method

Abstract

According to the square culvert pipeline repairing construction system and method, the distance and angle of the walking rollers of the walking roller chain are adjusted through the innovatively-designed adjusting device in the spiral winding equipment, so that the matching tightness degree of the walking roller chain and the track frame is proper, the movement track directions of all the walking rollers are kept consistent, and the repairing efficiency is improved. Therefore, the walking roller chain can run smoothly, and it is ensured that a high-precision lining pipe can be wound in a large-size square culvert pipeline. According to the square culvert pipeline repairing construction system and method, through the supporting device for internal and external combined supporting, a newly-wound lining pipeline is stabilized, the newly-wound lining pipeline and an old pipeline are anchored to guarantee positioning and centering, and conditions are created for high-quality grouting. And the construction efficiency of square culvert pipeline repairing and the quality reliability of a final repairing body are remarkably improved.

Description

Technical Field

[0001] This application relates to a culvert repair construction system and method, which belongs to trenchless pipeline repair technology. Background Technology

[0002] Urban drainage pipelines play a crucial role in sewage and flood control. With the continuous advancement of urbanization in my country, the maintenance and repair of drainage pipelines have received increasing attention. Traditional repair methods typically involve excavation to replace pipes, which is not only large-scale, costly, and time-consuming, but also prone to causing traffic congestion and environmental pollution, making it unsuitable for the requirements of modern sustainable urban development. Trenchless repair technology is an advanced engineering technology that repairs existing damaged pipelines partially or entirely without excavation or with minimal excavation. Compared to traditional open-cut pipe replacement, this technology has significant advantages such as minimal impact on traffic, low environmental pollution, short construction period, fewer personnel required, high safety, and low overall cost, thus providing a more feasible technical approach for the upgrading and renovation of urban underground pipelines. The traveling spiral winding pipe construction equipment is a trenchless pipe repair construction equipment that uses a traveling roller chain to travel along the inner wall of a culvert pipe and perform spiral winding construction (such as the culvert pipe repair equipment disclosed in Chinese Utility Model Patent CN 210510728 U). However, due to the large diameter of the culvert pipe, when cement mortar is injected between the spiral winding repair lining pipe and the culvert pipe, the repair lining pipe is easily squeezed by the cement mortar and cannot maintain alignment with the culvert pipe. Moreover, the large size of the culvert pipe can also easily lead to a large cumulative installation error of the traveling roller chain, and problems such as non-parallelism of the traveling rollers can cause the operation to stall. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a culvert repair construction system and method that can improve the repair quality and efficiency of culverts.

[0004] To achieve the above objectives, this application provides a culvert repair construction system, comprising:

[0005] A spiral winding device is used to spirally wind strip profiles into a culvert pipe to form an inner lining pipe. The spiral winding device includes a track frame, a traveling roller chain installed on the outer periphery of the track frame, and a head unit installed on the traveling roller chain. The head unit drives the traveling roller chain to move around the outer periphery of the track frame and wind the profile to form the inner lining pipe. The traveling roller chain is composed of multiple traveling roller units connected together. After the spiral winding device winds a section of the inner lining pipe, a support device is installed in the inner lining pipe, including a support frame set inside the inner lining pipe. The support frame is provided with multiple inner support rods, which support the inner wall of the inner lining pipe. The support frame is also provided with multiple outer support rods, which pass through pre-made through holes in the inner lining pipe and support the inner wall of the culvert pipe.

[0006] Preferably, it also includes a grouting device for injecting cement mortar into the interlayer gap between the inner lining pipe and the culvert pipe. After the support device is installed in the inner lining pipe, the grouting device is used to inject cement mortar into the interlayer gap between the inner lining pipe and the culvert pipe.

[0007] Preferably, a protective block is provided between the inner support rod and the inner lining pipe.

[0008] Preferably, the protective block is a rubber block or a wooden block.

[0009] Preferably, both the inner and outer support rods are threadedly connected to the support frame.

[0010] Corresponding to the culvert repair construction system of the present invention, the present invention also provides a culvert repair construction method, comprising the following steps:

[0011] S1: Measure the width and height of the cross-section of the culvert pipe, and assemble the track frame, traveling roller chain and head unit of the spiral winding equipment according to the measured dimensions to complete the assembly of the spiral winding equipment;

[0012] S2: Use spiral winding equipment to wind the inner lining pipe inside the square culvert pipe;

[0013] S3: Assemble the support device in the already wound inner lining pipe. The inner support rod supports the inner lining pipe, and the outer support rod supports the square culvert pipe.

[0014] S4: Inject cement mortar into the gap between the inner lining pipe and the culvert pipe where the support device has been erected;

[0015] S5: After the cement mortar injection is completed, remove the support device and fill the hole through which the outer strut passes through the inner lining pipe.

[0016] Preferably, in step S2, after winding a section of the inner lining pipe, the winding is paused, and subsequent steps are carried out first; after completing step S5, steps S2 to S5 are repeated on the pipe parts that have not been filled with cement mortar until the construction is completed.

[0017] Preferably, in step S2, the spiral winding device continuously winds the inner lining pipe inside the culvert pipe; steps S3 to S5 are repeated in the pipe sections where cement mortar has not been poured until the construction is completed.

[0018] Preferably, step S1 further includes the step of installing the first traveling roller unit:

[0019] S11: When assembling the traveling roller chain, install the first traveling roller unit on the track frame, adjust the distance D1 between the first traveling roller unit and the reference side wall of the track groove of the track frame, adjust the perpendicularity angle C1 between the traveling roller unit and the track groove of the track frame, and then use a clamp to fix the first traveling roller unit relative to the track frame; then install the remaining traveling roller units in sequence.

[0020] More preferably, step S1 further includes the step of installing the nth traveling roller unit:

[0021] S12: Connect the nth traveling roller unit to be installed to the (n-1)th traveling roller unit already installed on the track frame. Measure the distance Dn between the traveling roller unit to be installed and the reference side wall of the track groove of the track frame. Adjust the perpendicularity angle Cn between the traveling roller unit to be installed and the track groove of the track frame. If the measured distance Dn or perpendicularity angle Cn exceeds the preset range, remove the nth traveling roller unit and adjust Dn and Cn between the nth traveling roller unit and the (n-1)th traveling roller unit already installed to make them conform to the preset range.

[0022] Where n≥2.

[0023] As described above, the culvert repair construction system and method disclosed in this application have the following beneficial effects:

[0024] This application utilizes an innovatively designed adjustment device in the spiral winding equipment to adjust the spacing and angle of the traveling roller chain, ensuring a suitable tightness between the traveling roller chain and the track frame, and maintaining consistent movement trajectories for each traveling roller. This allows the traveling roller chain to operate smoothly, ensuring the winding of high-precision inner lining pipes even in large-sized culverts. The combined internal and external support device stabilizes the newly wound inner lining pipe and anchors it to the old pipe, ensuring positioning and alignment, thus creating conditions for high-quality grouting. This culvert repair construction system and method of this application, with its complementary system and method, significantly improves the construction efficiency and final quality reliability of culvert repair. Attached Figure Description

[0025] Figure 1 The diagram shown is of a culvert spiral winding device.

[0026] Figure 2 This diagram shows the construction status of a spiral winding device inside a culvert.

[0027] Figure 3 This diagram shows a culvert with an inner lining pipe wrapped around it.

[0028] Figure 4The diagram shows the state of the culvert and the inner lining pipe with supporting devices installed.

[0029] Figure 5 The diagram shows the state where cement mortar is poured between the culvert pipe and the inner lining pipe.

[0030] Figure 6 The diagram shows the state after cement mortar grouting has been completed between the culvert pipe and the inner lining pipe, and the supporting device has been removed.

[0031] Component designation explanation

[0032] 1-Square culvert pipe

[0033] 2-Lined pipe

[0034] 21-via

[0035] 3-Strip profile

[0036] 4-Traveling Roller Chain

[0037] 41-Traveling Roller Unit

[0038] 42-Traveling Roller

[0039] 43-Telescopic connecting frame

[0040] 5-Track Frame

[0041] 6-Head Unit

[0042] 7-Interlayer voids

[0043] 8-Supporting Frame

[0044] 81-Inner Support Rod

[0045] 82-Protective Block

[0046] 83-External support rod

[0047] 84-Mortar layer

[0048] 85-packing

[0049] 86-Inner Frame

[0050] 87-Outer Frame

[0051] 88-Support Beam Detailed Implementation

[0052] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification.

[0053] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of this application, should still fall within the scope of the technical content disclosed in this application. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this application.

[0054] Please refer to Figures 1 to 6 This application provides a culvert repair construction system, comprising:

[0055] A spiral winding device is used to spirally wind strip profiles 3 into a culvert pipe 1 to form an inner lining pipe 2. The spiral winding device includes a track frame 5, a traveling roller chain 4 installed on the outer periphery of the track frame 5, and a head unit 6 installed on the traveling roller chain 4. The head unit 6 drives the traveling roller chain 4 to move around the outer periphery of the track frame 5 and wind the profile to form the inner lining pipe 2. The traveling roller chain 4 is composed of multiple traveling roller units 41 connected together. Please refer to [reference needed]. Figures 4 to 6 After a section of inner lining pipe 2 is wound by a spiral winding device, a support device is installed in the inner lining pipe 2, including a support frame 8 set inside the inner lining pipe 2. The support frame 8 is provided with multiple inner support rods 81, which support the inner wall of the inner lining pipe 2. The support frame 8 is also provided with multiple outer support rods 83, which pass through pre-made through holes 21 on the inner lining pipe 2 and support the inner wall of the culvert pipe 1.

[0056] The culvert repair construction system of this application, through the support device of internal and external combined support, not only stabilizes the newly wound inner lining pipe 2, but also anchors it to the old pipe to ensure positioning and centering, thus creating conditions for high-quality grouting. The culvert repair construction system and method of this application complement each other, significantly improving the construction efficiency of culvert repair and the quality and reliability of the final repair body.

[0057] Please refer to Figure 1The spiral winding equipment is used to spirally wind a strip profile 3 (usually made of engineering plastics with good corrosion resistance and strength, such as PVC or HDPE, with male and female clamps on both sides) inside a culvert 1 to be repaired, forming a continuous, sealed new type of inner lining pipe 2. The equipment mainly includes a track frame 5, a traveling roller chain 4, and a head unit 6. The track frame 5 serves as the installation foundation and guide rail for the equipment and is usually modularly assembled according to the cross-sectional dimensions of the culvert 1 to be repaired. Its cross-sectional profile is usually similar to the inner profile of the culvert 1 but slightly smaller to allow for installation and operation space. The traveling roller chain 4 is composed of multiple traveling roller units 41 connected end-to-end by hinges or other means to form a closed loop chain that wraps around the outer periphery of the track frame 5. Each traveling roller unit 41 is equipped with a traveling roller 42, which is connected to a track roller (not shown in the figure) in the track groove of the track frame 5 via a telescopic connecting frame 43. Track rollers that mate with the track groove are mounted on the track rollers, and the track rollers roll and move within the track groove, thus causing the traveling roller 42 to move together. The head unit 6 drives the traveling roller chain 4 to circulate along the track frame 5 and presses and locks the strip profile 3. The head unit 6 is connected to the drive traveling roller of the traveling roller chain 4, thereby driving the traveling roller chain 4 to move. The head unit 6 has a mechanism for pressing and locking the strip profile 3, continuously winding and pressing the strip profile 3 together along a spiral trajectory, ultimately forming an inner lining pipe 2 on the outside of the track frame 5.

[0058] This application discloses a culvert repair construction system, which also includes a grouting device for injecting cement mortar into the gap between the inner lining pipe and the culvert pipe. Please refer to [reference needed]. Figures 5 to 6After installing the support device in the inner lining pipe 2, cement mortar is injected into the interlayer gap 7 between the inner lining pipe 2 and the culvert pipe 1 using a grouting device. Shims or other devices can be installed between some adjacent traveling roller units 41 to adjust the gap between them. During equipment assembly or debugging, shims are installed according to the actual conditions such as the straightness of the track frame 5 and the irregularity of the internal space of the culvert pipe 1. These shims are used to fine-tune the gap and relative angle between two connected traveling roller units 41, thereby ensuring that the entire traveling roller chain 4 can more accurately conform to the shape of the track frame 5, guaranteeing the roundness, dimensional accuracy, and uniformity of the gap between the wound inner lining pipe 2 and the old pipe. Due to processing and installation errors, the frame of the telescopic connecting frame 43 of the traveling roller unit 41 is not parallel to the traveling roller 42. It is necessary to adjust the angle between the frames of the telescopic connecting frames 43 of the two traveling roller units 41 to ensure that the traveling roller 42 is parallel. The threaded connector on the reverse threaded adjusting rod and the threaded hole on the telescopic connecting frame 43 can be clearance-fitted, thus accommodating situations where the lengths of the two reverse threaded adjusting rods are different between the two telescopic connecting frames 43, so as to achieve the adjustment of the angle between the traveling rollers 42. When it is necessary to adjust the relative deflection angle between the two telescopic connecting frames 43, the two reverse threaded adjusting rods can be finely adjusted to make the two telescopic frames have a certain angle, thereby ensuring that the traveling rollers 42 of the two traveling roller units 41 are parallel.

[0059] After the spiral winding equipment completes the winding of a section of the inner lining pipe 2 (usually a certain length, such as 10-30 meters), a support device needs to be installed inside this section of the inner lining pipe 2 to provide a stable inner mold for subsequent grouting and to prevent the inner lining pipe 2 from deforming due to grouting pressure. Figure 4 and Figure 5 As shown, the support frame 8 is a rigid frame structure that can be assembled and disassembled, including an inner frame 86 and an outer frame 87. The inner frame 86 and the outer frame 87 are rigidly connected by a support beam 88. The support frame 8 provides an installation base for the inner struts 81 and the outer struts 83. Multiple inner struts 81 are connected to the support frame 8. One end of each inner strut 81 is connected to the support frame 8 (e.g., by threaded connection, for easy length adjustment), and the other end abuts against the inner wall of the inner lining pipe 2. To protect the surface of the newly formed inner lining pipe 2 from scratches or pressure damage, a protective block 82 (such as a rubber block or a wooden block) is placed between the end of the inner strut 81 and the inner wall of the inner lining pipe 2. Multiple outer struts 83 are also connected to the support frame 8. After the inner lining pipe 2 is formed, through holes 21 are pre-drilled at predetermined positions. The outer struts 83 pass through these through holes 21, with one end connected to the support frame 8 (preferably by threaded connection), and the other end directly abutting against the original inner wall of the culvert pipe 1 to be repaired. The function of the external strut 83 is to firmly "anchor" the support device and even the entire inner lining pipe 2 system to the old pipe, resisting the buoyancy or displacement that may occur during grouting.

[0060] Corresponding to the culvert repair construction system of the present invention, the present invention also provides a culvert repair construction method, which uses the culvert repair construction system described above for construction and includes the following steps:

[0061] S1: Measure the width and height of the cross-section of the culvert 1, and assemble the track frame 5, traveling roller chain 4 and head unit 6 of the spiral winding equipment according to the measured dimensions to complete the assembly of the spiral winding equipment;

[0062] S2: Use a spiral winding device to wind the inner lining pipe 2 inside the square culvert pipe 1;

[0063] S3: Assemble a support device in the already wound inner lining pipe 2, with inner support rod 81 supporting the inner lining pipe 2 and outer support rod 83 supporting the culvert pipe 1.

[0064] S4: Inject cement mortar into the interlayer gap 7 between the inner lining pipe 2 and the culvert pipe 1, where the support device has been erected; to form a mortar layer 84;

[0065] S5: After the cement mortar injection is completed, remove the support device and fill the through hole 21 through which the outer strut 83 passes through the inner lining pipe 2.

[0066] Before construction, the culvert 1 to be repaired is assessed by measuring the width and height of its cross-section and evaluating its internal condition. Based on the measured dimensions, the track frame 5 and traveling roller chain 4 of the spiral winding equipment are assembled, and the assembled spiral winding equipment is transported into the culvert 1 for construction.

[0067] Preferably, in step S2, after winding a section of the inner lining pipe, the winding is paused, and subsequent steps are performed first; after completing step S5, steps S2 to S5 are repeated on the pipe sections that have not been grouted with cement mortar until the construction is completed. For cases where the construction distance inside the culvert pipe is long, in order to facilitate grouting operations, the winding, support, and grouting are carried out in sections: after winding a section of pipe, support is provided, and then grouting is performed, and this process is repeated until the construction is completed.

[0068] Preferably, in step S2, the spiral winding equipment continuously winds the inner lining pipe inside the culvert pipe; steps S3 to S5 are repeated for the pipe sections not filled with cement mortar until construction is completed. For cases where the construction distance inside the culvert pipe is short, the pipe winding can be completed in one go, followed by segmented support and grouting until construction is finished. Preferably, step S1 also includes the step of installing the first traveling roller unit 41:

[0069] S11: When assembling the traveling roller chain 4, install the first traveling roller unit 41 on the track frame 5, adjust the distance D1 between the first traveling roller unit 41 and the reference side wall of the track groove of the track frame 5, adjust the perpendicularity angle C1 between the traveling roller unit 41 and the track groove of the track frame 5, and then use a clamp to fix the first traveling roller unit 41 relative to the track frame 5; then install the remaining traveling roller units 41 in sequence.

[0070] More preferably, step S1 further includes the step of installing the nth traveling roller unit 41:

[0071] S12: Connect the nth traveling roller unit 41 to be installed to the (n-1)th traveling roller unit 41 already installed on the track frame 5. Measure the distance Dn between the traveling roller unit 41 to be installed and the reference side wall of the track groove of the track frame 5. Adjust the perpendicularity angle Cn between the traveling roller unit 41 to be installed and the track groove of the track frame 5. If the measured distance Dn or perpendicularity angle Cn exceeds the preset range, remove the nth traveling roller unit 41 and adjust Dn and Cn between the nth traveling roller unit and the (n-1)th traveling roller unit already installed to make them conform to the preset range.

[0072] Where n≥2.

[0073] High-precision electronic levels or laser calibrators can also be used to assist in adjusting the axial parallelism of the traveling rollers. A flat surface can be machined on the side wall of the track groove of the track frame 5 as a reference side wall, and this surface can be calibrated and confirmed using a high-precision electronic level or laser tracker. At the starting position of the track groove installation, the first traveling roller unit 41 is used as the reference roller, and it is rigidly locked to the track frame 5 using a special tooling fixture, making it the absolute spatial reference for all subsequent corrections. Then, a double-loop iterative method from the middle to both sides is used for parallel correction:

[0074] Starting with the locked reference roller, installation adjustments are made extending to both sides to adjust the adjacent traveling roller units. Using dial indicators or laser displacement sensors mounted at both ends of the roller shafts, the parallelism deviation of the traveling roller units 41 on both sides of the reference roller relative to the reference roller shaft is measured at both ends. Based on the magnitude of the deviation, shims are used to adjust the angle and gap of the installed traveling roller units.

[0075] After completing the closed installation of the traveling roller chain 4, install the head unit 6 and other auxiliary components, and send the assembled equipment into the starting working position inside the culvert pipe 1. Start the spiral winding equipment. The head unit 6 drives the traveling roller chain 4 to move along the track frame 5, while continuously winding and locking the fed strip profile 3 to form a tight inner lining pipe 2. The spiral winding equipment moves forward while winding. At the location where the external support rod 83 needs to be installed, pre-fabricated through holes 21 are simultaneously or subsequently drilled on the inner lining pipe 2.

[0076] After the inner lining pipe 2 is wound, a support device is assembled inside it, and each inner support rod 81 is installed. The ends of the inner support rods 81 are firmly pressed against the inner wall of the inner lining pipe 2 by protective blocks 82, so that the support frame 8 is centered and aligned in the inner lining pipe 2. Each outer support rod 83 is installed, passing through the through holes 21 on the inner lining pipe 2, and finally pressed against the original inner wall of the culvert pipe 1. At this time, the entire inner lining pipe section is fixed from both inside and outside. A grouting device is connected from the end of the inner lining pipe 2 to inject cement mortar into the gap between the inner lining pipe 2 and the culvert pipe 1, and pressure is maintained for a period of time to ensure that the interlayer is filled densely. After the grout reaches a certain strength (usually more than 70% of the design strength), the support device is loosened and removed in reverse order. The through holes 21 through which the outer support rods 83 pass are sealed with a sealant 85 that is compatible with the material of the inner lining pipe 2 to restore the integrity of the inner lining.

[0077] Based on the above-described specific implementation scheme, this application uses an innovatively designed adjustment device in the spiral winding equipment to adjust the spacing and angle of the traveling roller chain, ensuring that the tightness of the traveling roller chain and the track frame are appropriate, and that the movement trajectory direction of each traveling roller is consistent. This allows the traveling roller chain to run smoothly, ensuring that high-precision inner lining pipes can be wound even in large-sized culvert pipes. Through the support device with combined internal and external support, the newly wound inner lining pipe is stabilized, and it is anchored to the old pipe to ensure positioning and alignment, creating conditions for high-quality grouting. The culvert pipe repair construction system and method of this application are complementary, significantly improving the construction efficiency of culvert pipe repair and the quality and reliability of the final repair body.

[0078] In summary, this application effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0079] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A culvert repair construction system, characterized in that the system... include: A spiral winding device is used to spirally wind strip profiles to form an inner lining pipe inside a culvert. The spiral winding device includes a track frame, a traveling roller chain installed on the outer periphery of the track frame, and a head unit installed on the traveling roller chain. The head unit is used to drive the traveling roller chain to move around the outer periphery of the track frame and wind the profile to form the inner lining pipe. The traveling roller chain is composed of multiple traveling roller units connected together. After a section of inner lining pipe is wound by a spiral winding device, a support device is installed in the inner lining pipe, including a support frame set inside the inner lining pipe, with multiple inner support rods on the support frame, the multiple inner support rods supporting the inner wall of the inner lining pipe; the support frame is also provided with multiple outer support rods, the multiple outer support rods passing through pre-made through holes on the inner lining pipe and supporting the inner wall of the culvert pipe.

2. The culvert repair construction system according to claim 1, characterized in that, It also includes a grouting device for injecting cement mortar into the interlayer gap between the lining pipe and the culvert pipe. The cement mortar is injected using the grouting device after the support device is installed in the lining pipe.

3. The culvert repair construction system according to claim 1, characterized in that, Both the inner and outer support rods are threadedly connected to the support frame.

4. The culvert repair construction system according to claim 1, characterized in that, A protective block is provided between the inner support rod and the inner lining pipe.

5. The culvert repair construction system according to claim 4, characterized in that, The protective block is a rubber block or a wooden block.

6. A method for repairing culverts, comprising the following steps: S1: Measure the width and height of the cross-section of the culvert pipe, and assemble the track frame, traveling roller chain and head unit of the spiral winding equipment according to the measured dimensions to complete the assembly of the spiral winding equipment; S2: Use spiral winding equipment to wind the inner lining pipe inside the square culvert pipe; S3: Assemble the support device in the already wound inner lining pipe. The inner support rod supports the inner lining pipe, and the outer support rod supports the square culvert pipe. S4: Inject cement mortar into the gap between the inner lining pipe and the culvert pipe where the support device has been erected; S5: After the cement mortar injection is completed, remove the support device and fill the hole through which the outer strut passes through the inner lining pipe.

7. The method for repairing culverts according to claim 6, characterized in that, In step S2, after winding a section of the inner lining pipe, the winding is paused, and the subsequent steps are carried out first; after completing step S5, steps S2 to S5 are repeated on the pipe parts that have not been filled with cement mortar until the construction is completed.

8. The method for repairing culverts according to claim 6, characterized in that, In step S2, the spiral winding equipment continuously winds the inner lining pipe inside the culvert pipe; steps S3 to S5 are repeated in the pipe sections that have not been filled with cement mortar until the construction is completed.

9. The method for repairing culverts according to claim 6, characterized in that, Step S1 also includes the step of installing the first traveling roller unit: S11: When assembling the traveling roller chain, install the first traveling roller unit on the track frame, adjust the distance D1 between the first traveling roller unit and the reference side wall of the track groove of the track frame, adjust the perpendicularity angle C1 between the traveling roller unit and the track groove of the track frame, and then use a clamp to fix the first traveling roller unit relative to the track frame; then install the remaining traveling roller units in sequence.

10. The method for repairing culverts according to claim 9, characterized in that, Step S1 also includes the step of installing the nth traveling roller unit: S12: Connect the nth traveling roller unit to be installed to the (n-1)th traveling roller unit already installed on the track frame. Measure the distance Dn between the traveling roller unit to be installed and the reference side wall of the track groove of the track frame. Adjust the perpendicularity angle Cn between the traveling roller unit to be installed and the track groove of the track frame. If the measured distance Dn or perpendicularity angle Cn exceeds the preset range, remove the nth traveling roller unit and adjust Dn and Cn between the nth traveling roller unit and the (n-1)th traveling roller unit already installed to make them conform to the preset range. Where n≥2.

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