A large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process

Abstract

The invention relates to the technical field of irrigation and drainage pipeline installation, and discloses a large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process; a sand and gravel cushion layer is evenly laid on the inner side of the inner wall of a groove; the pipe section to be connected is first placed in the excavated pipe groove, and then the interface position is adjusted and fixed, and on-site joint production can be started without excavating a working pit and lifting auxiliary equipment, without being restricted by the site, and the joint working surface is relatively independent, and the normal installation and construction of other pipe sections are not affected. After the joint pasting is completed and the resin glue is solidified, the next process can be carried out, which significantly saves construction costs, improves construction efficiency, shortens construction period, and significantly reduces construction safety risks. After adjusting the distance of the side fixing frame, the friction block will be pressed, thereby improving the stability of the side support plate, reducing the shaking of the wedge-shaped positioning pillow after limiting, and improving the stability of the sand-filled pipe during joint production.

Description

Technical Field

[0001] The invention relates to the technical field of irrigation and drainage pipeline installation, in particular to an on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipes. Background Art

[0002] Glass fiber reinforced plastic sand-filled pipes are the most commonly used pipe types for water supply and drainage. There are two types of elbows: molded and jointed. Molded elbows need to be completed in the factory. Due to the uncertain turning angle, high mold cost and the need for special auxiliary mechanical equipment, the transportation efficiency of finished elbows is low and the cost is high. Therefore, on-site joint production is more applicable. The on-site joint production of large-diameter glass fiber reinforced plastic sand-filled pipes is a key construction link. Its quality and reliability directly affect the performance and safety of the entire pipeline system. The joint production process should be carried out strictly in accordance with the operating procedures to avoid operating errors that lead to a decrease in joint quality.

[0003] When the existing FRP sand-filled pipe is connected to other pipes, it usually needs to withstand the force from the inside, which causes the existing FRP sand-filled pipe to undergo circumferential deformation due to excessive pressure, and further causes the pipe to rupture. Therefore, there is an urgent need for a highly wear-resistant FRP sand-filled pipe to avoid expansion and rupture caused by excessive pipe pressure.

[0004] Based on the above technical problems, the prior art also provides some solutions. For example, the Chinese patent with the patent application document CN112046103B discloses a high wear-resistant glass fiber reinforced plastic sand-filled pipe. On the basis of the prior art, the device improves the structure of the glass fiber reinforced plastic sand-filled pipe, allows the aramid fiber to be wound at a specific angle, effectively improves the axial force of the glass fiber reinforced plastic sand-filled pipe, and can effectively improve the bearing capacity of the glass fiber reinforced plastic sand-filled pipe to the internal pressure. The aramid fiber is overlapped in multiple layers, thereby further improving the internal bearing capacity of the glass fiber reinforced plastic sand-filled pipe.

[0005] However, in actual production operations, the traditional annular winding method requires the assistance of a working pit or lifting equipment to make joints. Due to the limitations of terrain and working conditions, the excavation of the working pit causes great interference to the construction, and the excavation and backfilling processes are increased, resulting in low work efficiency. At the same time, the use of lifting equipment to assist in production will increase costs, and existing pipes often use traditional ordinary positioning blocks for clamping and limiting during the jointing process, which is easily affected by external factors during the limiting process. Summary of the invention

[0006] The purpose of the present invention is to provide a large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process, which solves the problem that the traditional annular winding method for making joints in the background technology requires a working pit or lifting equipment to assist in completion. Due to the limitations of terrain and working conditions, the excavation of the working pit has great construction interference, and the excavation and backfilling processes are increased, and the work efficiency is too low; at the same time, the use of lifting equipment to assist in production will increase costs, and the existing pipelines often use traditional ordinary positioning blocks for clamping and limiting during the jointing process, which is easily affected by external factors during the limiting process.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process, the joint production steps are as follows:

[0009] S1. Evenly lay the gravel cushion layer on the inner side of the inner wall of the tank, and place the sand-filled pipe that needs to be jointed on the surface of the gravel cushion layer;

[0010] S2. Connect two flat-end glass fiber reinforced plastic sand-filled pipes laid in the pipe trench by on-site joint pasting;

[0011] S3. Wedge-shaped positioning pillows are laid on both sides of the sand-filled pipe and the surface of the sand and gravel cushion layer, and the wedge-shaped positioning pillows on both sides of the sand-filled pipe are used for limiting to adjust the interface position and fix the sand-filled pipe;

[0012] S4. During the process of joint pasting connection, the annular seam resin glue of the sand-filled pipe joint is applied, and the inner layer pasting is combined with the outer layer pasting to connect the two glass fiber reinforced plastic sand-filled pipes;

[0013] S5. Clean the gaps at the two ends of the sand-containing pipe and fill them with annular resin glue after cleaning;

[0014] Preferably, the outer layer of the sand-filled pipe is composed of an outer layer bonding area and an outer layer extension area, and the lower part of the outer layer of the sand-filled pipe does not need to be sealed.

[0015] Preferably, the inner layer of the sand-filled pipe is composed of an inner lower bonding area, an inner sealing bonding area and an inner extension area.

[0016] Preferably: before the pasting, the sand-filled pipes to be connected are first laid on the surface of the sand and gravel cushion layer and the joints are pasted.

[0017] Preferably: when pasting the various parts of the joints, firstly, the base surface of the pasting area is roughened, then the resin glue is applied, and then the chopped strand mat is laid, and then the resin glue is applied after laying, and then the glass fiber cloth is laid after applying, and then the resin glue is applied after laying, and the above steps are repeated until the required pasting thickness is reached.

[0018] Preferably: an inner connecting hole is provided on the inner side of the wedge-shaped positioning pillow, a side fixing frame is fixedly connected to one side of the wedge-shaped positioning pillow, a threaded hole is provided on the inner side of the side fixing frame, and one side of the threaded hole is arranged parallel to one side of the inner connecting hole.

[0019] Preferably: one side of the inner wall of the groove is movably connected to a side support plate, one side of the side support plate is fixedly connected to a friction block, and there are multiple friction blocks, and the multiple friction blocks are arranged in parallel along one side of the side support plate.

[0020] Preferably: one side of the side support plate is fixedly connected to a side connecting frame, one side of the side connecting frame is fixedly connected to a side sleeve frame, one side of the side sleeve frame is movably sleeved with an inner sliding rod, and one side of the inner sliding rod is fixedly connected to the side support frame.

[0021] Preferably, one side of the side support frame is movably connected to a bearing disk, and one side of the bearing disk is movably connected to a threaded rod.

[0022] Preferably, one side of the threaded rod is threadably connected to the inner side of the threaded hole.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] 1. When the large-diameter FRP sand-filled pipe on-site joint production process is used for pipeline installation and construction, first place the pipe section to be connected in the excavated pipe groove, and then adjust and fix the interface position. No need to excavate a working pit or hoist auxiliary equipment to start on-site joint production, it is not restricted by the site, and the joint working surface is relatively independent, which does not affect the normal installation and construction of other pipe sections. After the joint paste is completed and the resin glue is cured, the next process can be carried out. It significantly saves construction costs, improves construction efficiency, shortens construction period, and significantly reduces construction safety risks;

[0025] 2. Fit the side support plate with the surface of the inner wall of the groove, push the side support plate after fitting, and move the threaded rod to one side of the wedge-shaped positioning pillow. At this time, by rotating the side support frame, the inner sliding rod can be driven to rotate along the inner side of the side sleeve frame. When the side support plate remains in contact with the surface of the inner wall of the groove, the side support frame is rotated to adjust the angle of the threaded rod, which is suitable for the inner wall of the groove with different inclination angles, thereby improving practicality. After the threaded rod is rotated to one side of the side fixing frame, the threaded rod is moved to the inner side of the threaded hole. At this time, the threaded rod is rotated, and one side of the threaded rod is movably connected to the side support frame through the bearing plate, and the stable rotation of the threaded rod is maintained through the movable connection of the bearing plate;

[0026] 3. Through the threaded connection between the threaded rod and the threaded hole, the side fixing frame will be driven to move horizontally after the threaded rod is rotated. The horizontal movement of the side fixing frame will push the wedge-shaped positioning pillow to be adjusted horizontally, and the threaded rod will move along the inner side of the inner connecting hole during the adjustment process. By adjusting the wedge-shaped positioning pillow, the stability of the sand-containing pipe limit can be improved, and the gap between the wedge-shaped positioning pillow and the sand-containing pipe can be reduced. One side of the side support plate is fitted with the inner wall of the groove through multiple friction blocks. After adjusting the distance of the side fixing frame, the friction block will be pressed, which improves the stability of the side support plate and reduces the shaking of the wedge-shaped positioning pillow after limiting. The stability of the sand-filled pipe during joint production is improved. The adjustable wedge-shaped positioning pillow allows the staff to accurately position and adjust the joint on site. By adjusting the horizontal position of the wedge-shaped positioning pillow, the accurate alignment of the pipe joint can be ensured, thereby improving the sealing and stability of the joint. The adjustable wedge-shaped positioning pillow can provide additional support and fixation, which helps to enhance the overall stability of the pipeline system and prevent the displacement or deformation of the pipeline due to external factors such as wind force. The adjustable wedge-shaped positioning pillow can be easily removed or adjusted to inspect and repair the pipe joint. This helps to ensure the long-term stable operation of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall appearance of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 3 It is a schematic diagram of the longitudinal section structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the internally connected hole structure of the present invention;

[0031] Figure 5 It is a schematic diagram of the threaded rod structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the friction block structure of the present invention.

[0033] Among them: 1. sand-filled pipe; 2. sand and gravel cushion layer; 21. outer layer bonding area; 22. outer layer extension area; 3. pipe groove; 4. groove inner wall; 5. annular seam resin glue; 6. wedge-shaped positioning pillow; 81. inner connecting hole; 82. side fixing frame; 83. threaded hole; 84. threaded rod; 85. bearing plate; 86. side support frame; 87. inner sliding rod; 88. side sleeve frame; 89. side connecting frame; 810. side support plate; 811. friction block; 11. inner layer sealing bonding area; 12. inner layer extension area; 13. inner lower bonding area. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-6 , a large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process, the joint production steps are as follows:

[0036] S1, evenly lay the gravel cushion layer 2 on the inner side of the tank inner wall 4, and place the sand-filled pipe 1 to be jointed on the surface of the gravel cushion layer 2;

[0037] S2, connecting two flat-end glass fiber reinforced plastic sand-filled pipes 1 laid in the pipe groove 3 by on-site joint pasting;

[0038] S3, laying wedge-shaped positioning pillows 6 on both sides of the sand-containing pipe 1 and the surface of the sand and gravel cushion layer 2, and using the wedge-shaped positioning pillows 6 on both sides of the sand-containing pipe 1 to limit the position, so as to adjust the interface position and fix the sand-containing pipe 1;

[0039] S4, in the process of joint paste connection, the annular seam resin glue 5 of the joint of the sand-filled pipe 1 is applied, and the inner layer paste is combined with the outer layer paste to connect the two glass fiber reinforced plastic sand-filled pipes 1;

[0040] S5, cleaning the gaps at the two pipe ends of the sand-containing pipe 1, and filling them with annular resin glue 5 after cleaning;

[0041] It should be noted that the pipe section to be connected is first placed in the excavated pipe trench, and then the interface position is adjusted and fixed. On-site joint production can be started without excavating a working pit and lifting auxiliary equipment. It is not restricted by the site, and the joint working surface is relatively independent, which does not affect the normal installation and construction of other pipe sections.

[0042] In an optional embodiment, the outer layer of the sand-filled pipe 1 is composed of an outer layer bonding area 21 and an outer layer extension area 22 , and the lower part of the outer layer of the sand-filled pipe 1 does not need to be sealed.

[0043] It should be noted that, after the outer layer pasting area 21 and the outer layer extension area 22 are roughened and debris is removed using a handheld angle grinder outside the pipeline, the resin glue is applied and the annular seam resin glue 5 is used to fill the upper part.

[0044] In an optional embodiment, the inner layer paste system of the sand-filled pipe 1 is composed of an inner lower paste joint area 13 , an inner layer sealing paste joint area 11 and an inner layer extension area 12 .

[0045] It should be noted that the two sand-filled pipes 1 to be joined are hoisted into the excavated pipe groove 3, and then the ends are cut and polished according to the actual turning angle before being connected, and the end interfaces are aligned and fixed using a wedge-shaped positioning pillow 6. At the same time, a handheld angle grinder is used to grind the inner sealing glue area 11, the inner extension area 12, and the inner lower glue area 13 of the sand-filled pipe 1, and after removing debris, resin glue is applied, and the annular seam resin glue 5 is used for lower filling.

[0046] In an optional embodiment: before pasting, the sand-filled pipes 1 to be connected are first laid on the surface of the sand and gravel cushion layer 2 to perform joint pasting.

[0047] It should be noted that the gravel cushion layer 2 can provide uniform support, help maintain the stability and levelness of the pipeline, and prevent deformation or damage of the pipeline due to uneven settlement of the foundation. When the pipeline is subjected to external pressure or its own weight, the gravel cushion layer 2 can play a certain buffering role, reduce stress concentration, and thus extend the service life of the pipeline. The gravel cushion layer 2 can protect the pipeline from direct contact with sharp objects or hard particles in the foundation, reducing the risk of scratches or wear on the pipeline. At the same time, laying the gravel cushion layer 2 can make it easier to adjust the position of the pipeline during installation, ensuring the accuracy and levelness of the pipeline installation, and also helping the smooth progress of subsequent joint production.

[0048] In an optional embodiment: when pasting various parts of the joints, first grind the base surface of the pasting area, then apply resin glue, then lay the chopped strands of felt, then apply resin glue after laying, then lay glass fiber cloth after applying, then apply resin glue after laying, and repeat the above steps until the required paste thickness is reached.

[0049] It should be noted that the joint working surface is relatively independent and does not affect the normal installation and construction of other pipe sections. After the joint is pasted and the resin glue is cured, the next process can be carried out. This can significantly save construction costs, improve construction efficiency, shorten construction period, and significantly reduce construction safety risks.

[0050] In an optional embodiment: an inner connecting hole 81 is opened on the inner side of the wedge-shaped positioning pillow 6, and a side fixing frame 82 is fixedly connected to one side of the wedge-shaped positioning pillow 6. A threaded hole 83 is opened on the inner side of the side fixing frame 82, and one side of the threaded hole 83 is arranged parallel to one side of the inner connecting hole 81.

[0051] It should be noted that the active connection of the bearing plate 85 maintains the stable rotation of the threaded rod 84. Through the threaded connection between the threaded rod 84 and the threaded hole 83, the side fixing frame 82 will be driven to move horizontally after the threaded rod 84 is rotated. The horizontal movement of the side fixing frame 82 will push the wedge-shaped positioning pillow 6 to be horizontally adjusted, and the threaded rod 84 will move along the inner side of the internal connecting hole 81 during the adjustment process. By adjusting the wedge-shaped positioning pillow 6, the stability of the limit of the sand-containing pipe 1 can be improved, and the gap between the wedge-shaped positioning pillow 6 and the sand-containing pipe 1 can be reduced.

[0052] In an optional embodiment: one side of the groove inner wall 4 is movably connected to a side support plate 810, one side of the side support plate 810 is fixedly connected to a friction block 811, and the number of friction blocks 811 is multiple, and the multiple friction blocks 811 are all arranged in parallel along one side of the side support plate 810.

[0053] It should be noted that by adjusting the wedge-shaped positioning pillow 6, the stability of the sand-filled pipe 1 can be improved, and the gap between the wedge-shaped positioning pillow 6 and the sand-filled pipe 1 can be reduced. One side of the side support plate 810 is fitted with the inner wall 4 of the groove through multiple friction blocks 811. After adjusting the distance of the side fixing frame 82, the friction block 811 will be pressed, thereby improving the stability of the side support plate 810, reducing the shaking of the wedge-shaped positioning pillow 6 after limiting, and improving the stability of the sand-filled pipe 1 during seam making.

[0054] In an optional embodiment: one side of the side support plate 810 is fixedly connected to a side connecting frame 89, one side of the side connecting frame 89 is fixedly connected to a side sleeve frame 88, one side of the side sleeve frame 88 is movably sleeved with an inner sliding rod 87, and one side of the inner sliding rod 87 is fixedly connected to a side support frame 86.

[0055] It should be noted that the side support plate 810 is fitted with the surface of the inner wall 4 of the groove, and then the side support plate 810 is pushed to move the threaded rod 84 to one side of the wedge-shaped positioning pillow 6. At this time, by rotating the side support frame 86, the inner sliding rod 87 can be driven to rotate along the inner side of the side sleeve frame 88. While the side support plate 810 remains in contact with the surface of the inner wall 4 of the groove, the side support frame 86 is rotated to adjust the angle of the threaded rod 84, which is suitable for the inner wall 4 of the groove with different inclination angles.

[0056] In an optional embodiment: one side of the side support frame 86 is movably connected to a bearing plate 85 , and one side of the bearing plate 85 is movably connected to a threaded rod 84 .

[0057] It should be noted that after the threaded rod 84 is rotated to one side of the side fixing frame 82, the threaded rod 84 is moved to the inner side of the threaded hole 83. At this time, the threaded rod 84 is rotated, and one side of the threaded rod 84 is movably connected to the side support frame 86 through the bearing plate 85. The stable rotation of the threaded rod 84 is maintained through the movable connection of the bearing plate 85. Through the threaded connection between the threaded rod 84 and the threaded hole 83, the side fixing frame 82 will be driven to move horizontally after the threaded rod 84 is rotated, and the horizontal movement of the side fixing frame 82 will push the wedge-shaped positioning pillow 6 to be horizontally adjusted.

[0058] In an optional embodiment, one side of the threaded rod 84 is threadedly connected to the inner side of the threaded hole 83 .

[0059] It should be noted that by rotating the side support frame 86, the inner sliding rod 87 can be driven to rotate along the inner side of the side sleeve frame 88. When the side support plate 810 remains in contact with the surface of the groove inner wall 4, the rotating side support frame 86 adjusts the angle of the threaded rod 84, which is suitable for groove inner walls 4 with different inclination angles, thereby improving practicality.

[0060] The specific working steps of a large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process are as follows:

[0061] The two sand-filled pipes 1 to be joined are hoisted into the excavated pipe groove 3, and then the ends are cut and polished according to the actual turning angle before docking, and the end interfaces are aligned and fixed using a wedge-shaped positioning pillow 6. At the same time, a handheld angle grinder is used to grind the inner sealing glue joint area 11, the inner extension area 12, and the inner lower glue joint area 13 in the sand-filled pipe 1, and the sundries are removed and then coated with resin glue, and the annular resin glue 5 is used for filling the lower part;

[0062] At the same time, the joints are made in the paste area inside the pipe. The process is: laying of chopped strand mat → brushing of resin glue → laying of glass fiber cloth → brushing of resin glue, and finally the process cycle. After the brushing and laying process cycle reaches the required paste thickness, the inner layer paste operation is completed.

[0063] At the same time, use a handheld angle grinder to grind the outer layer pasting area 21 and the outer layer extension area 22 outside the pipeline and remove the debris, then start to apply the resin glue, and use the annular seam resin glue 5 to fill the upper part;

[0064] After the filling is completed, the joints are made in the paste area outside the pipe. The process is: laying of chopped strand mat → brushing of resin glue → laying of glass fiber cloth → brushing of resin glue, and finally the process cycle. After the brushing and laying process cycle reaches the required paste thickness, the outer layer paste operation is completed;

[0065] Finally, after the resin glue is cured, the wedge-shaped positioning pillow 6 is taken out and the work site is cleaned up, and the joint production is completed;

[0066] At the same time, in the process of using the wedge-shaped positioning pillow 6 to limit the sand-containing pipe 1, first, the side support plate 810 is fitted with the surface of the inner wall 4 of the groove, and then the side support plate 810 is pushed to move the threaded rod 84 to one side of the wedge-shaped positioning pillow 6. At this time, by rotating the side support frame 86, the inner sliding rod 87 can be driven to rotate along the inner side of the side sleeve frame 88. When the side support plate 810 remains in contact with the surface of the inner wall 4 of the groove, the side support frame 86 is rotated to adjust the angle of the threaded rod 84, which is suitable for the inner wall 4 of the groove with different inclination angles, thereby improving practicality. After the threaded rod 84 is rotated to one side of the side fixing frame 82, the threaded rod 84 is moved to the inner side of the threaded hole 83. At this time, the threaded rod 84 is rotated, and one side of the threaded rod 84 is movably connected to the side support frame 86 through the bearing plate 85. The movably connected bearing plate 85 maintains the stable rotation of the threaded rod 84. Through the threaded connection between the threaded rod 84 and the threaded hole 83, the side fixing frame 82 is driven to move horizontally after the threaded rod 84 is rotated. The horizontal movement of the side fixing frame 82 pushes the wedge-shaped positioning pillow 6 to be horizontally adjusted, and the threaded rod 84 is in the horizontal direction. During the adjustment process, it will move along the inner side of the inner connecting hole 81. By adjusting the wedge-shaped positioning pillow 6, the stability of the sand-containing pipe 1 can be improved, and the gap between the wedge-shaped positioning pillow 6 and the sand-containing pipe 1 can be reduced. One side of the side support plate 810 is fitted with the inner wall 4 of the groove through multiple friction blocks 811. After adjusting the distance of the side fixing frame 82, the friction block 811 will be pressed tightly, thereby improving the stability of the side support plate 810, reducing the shaking of the wedge-shaped positioning pillow 6 after limiting, and improving the stability of the sand-containing pipe 1 during seam making. The adjustable wedge The positioning pillow 6 allows the staff to accurately position and adjust the joint on site. By adjusting the horizontal position of the wedge-shaped positioning pillow 6, the accurate alignment of the pipeline joint can be ensured, thereby improving the sealing and stability of the joint. The adjustable wedge-shaped positioning pillow 6 can provide additional support and fixing, which helps to enhance the overall stability of the pipeline system and prevent the displacement or deformation of the pipeline due to external factors such as wind force. The adjustable wedge-shaped positioning pillow 6 can be easily removed or adjusted to inspect and repair the pipeline joint. This helps to ensure the long-term stable operation of the pipeline system.

[0067] It should be noted that the parts not described in detail in the present invention are all prior art, and corresponding models can be selected according to actual needs. The internal structure and operating principle of the above parts are also common knowledge of those skilled in the art, and no further elaboration will be given on this.

[0068] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process, characterized in that: The steps for making seams are as follows: S1, evenly laying a gravel cushion layer (2) on the inner side of the inner wall (4) of the tank, and placing a sand-filled pipe (1) to be jointed on the surface of the gravel cushion layer (2); S2, connecting two flat-end glass fiber reinforced plastic sand-filled pipes (1) laid in the pipe trench (3) by means of on-site joint gluing; S3, laying wedge-shaped positioning pillows (6) on both sides of the sand-containing pipe (1) and on the surface of the sand and gravel cushion layer (2), and using the wedge-shaped positioning pillows (6) on both sides of the sand-containing pipe (1) to limit the position, so as to adjust the interface position and fix the sand-containing pipe (1); S4, during the process of joint gluing, the annular seam resin glue (5) of the joint of the sand-filled pipe (1) is applied, and the inner layer gluing is combined with the outer layer gluing to connect the two glass fiber reinforced plastic sand-filled pipes (1); S5. Clean the gaps at the two pipe ends of the sand-filled pipe (1), and fill them with annular resin glue (5) after cleaning.

2. According to claim 1, a large-diameter glass fiber reinforced plastic sand-filled pipe on-site joint pasting process is characterized by: The outer layer paste system of the sand-filled pipe (1) is composed of an outer layer paste joint area (21) and an outer layer extension area (22), and the lower part of the outer layer of the sand-filled pipe (1) does not need to be sealed.

3. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 2 is characterized by: The inner layer paste system of the sand-filled pipe (1) is composed of an inner lower paste joint area (13), an inner layer sealing paste joint area (11) and an inner layer extension area (12).

4. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 3 is characterized by: Before the pasting is performed in the pipe groove (3), the sand-filled pipe (1) to be connected is laid on the surface of the sand and gravel cushion layer (2), and then the joint pasting is performed.

5. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 1 is characterized in that: When the joints and various parts of the sand-filled pipe (1) are pasted in the pipe groove (3), the base surface of the pasting area is firstly roughened, and then the resin glue is applied. Then, the chopped strand mat is laid, and the resin glue is applied after laying. After the application is completed, the glass fiber cloth is laid, and finally the resin glue is applied. The above steps are repeated until the required pasting thickness is reached.

6. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 1 is characterized by: An inner communicating hole (81) is provided on the inner side of the wedge-shaped positioning pillow (6); a side fixing frame (82) is fixedly connected to one side of the wedge-shaped positioning pillow (6); a threaded hole (83) is provided on the inner side of the side fixing frame (82); one side of the threaded hole (83) is arranged parallel to one side of the inner communicating hole (81).

7. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 1 is characterized by: A side support plate (810) is movably connected to one side of the groove inner wall (4), and a friction block (811) is fixedly connected to one side of the side support plate (810). There are multiple friction blocks (811), and the multiple friction blocks (811) are arranged in parallel along one side of the side support plate (810).

8. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 7 is characterized in that: One side of the side support plate (810) is fixedly connected to a side connecting frame (89), one side of the side connecting frame (89) is fixedly connected to a side sleeve frame (88), one side of the side sleeve frame (88) is movably sleeved with an inner sliding rod (87), and one side of the inner sliding rod (87) is fixedly connected to a side support frame (86).

9. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 8 is characterized by: One side of the side support frame (86) is movably connected to a bearing plate (85), and one side of the bearing plate (85) is movably connected to a threaded rod (84).

10. The on-site joint pasting process for large-diameter glass fiber reinforced plastic sand-filled pipe according to claim 9 is characterized in that: One side of the threaded rod (84) is threadedly connected to the inner side of the threaded hole (83).

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