A composite polymer-based grouting repair system and method of use thereof

Abstract

The application discloses a kind of based on composite high polymer's grouting repair system and its use method, including bottom plate, the middle part of bottom plate is equipped with insertion hole, grouting pipe is inserted in the inside of insertion hole, bottom plate is also provided with closed assembly, closed assembly includes lifting frame, lifting frame is slidably connected on bottom plate, lifting frame is evenly provided with multiple support frames on lifting frame, sliding block is slidably connected on support frame, the lower portion of sliding block is provided with pressing plate, the present application is slid down by lifting frame, all pressing plate will be synchronized to slide down, then all pressing plate can close the road surface crack mouth portion below bottom plate, grouting pipe is inserted into the inside of crack, at this time polyurethane is injected into the inside of crack from the inside of liquid outlet hole, since road surface crack is closed by pressing plate, when crack is not filled, it can prevent polyurethane injected into crack from flowing out from the mouth portion of road surface crack in advance, ensure that crack can be filled with polyurethane, can improve the quality of polyurethane to road surface crack repair.

Description

Technical Field

[0001] This invention relates to the field of road repair technology, specifically to a grouting repair system based on composite polymers and its application method. Background Technology

[0002] Road surface cracks are a common problem in road engineering. If not repaired in time, they can lead to road damage and traffic inconvenience. Traditional road surface crack repair methods usually involve filling with polyurethane materials. However, during the filling process, polyurethane is generally injected directly into the crack from the crack opening. If the crack is not completely filled, the polyurethane can easily overflow from the crack opening, leaving unfilled areas in the (deeper) crack, resulting in poor repair results. Therefore, a grouting repair system based on composite polymers and its application method are proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a grouting repair system based on composite polymers and its application method to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grouting repair system based on composite polymer and its usage method, comprising a base plate, with multiple lifting rings arranged on the upper surface of the base plate. The lifting rings are used in conjunction with external steel wire ropes and suspension components to facilitate the movement of the base plate. An insertion hole is provided in the middle of the base plate, and a hollow grouting pipe for injecting polyurethane into road surface cracks is inserted into the insertion hole. Multiple outlet holes are evenly provided on the side wall of the grouting pipe. When repairing road surface cracks, the grouting pipe is inserted into the crack, and polyurethane is then injected from the outlet holes. Inside the crack, the polyurethane foaming reaction causes the injected polyurethane material to expand and increase in volume, which can fill, repair, and connect the road surface crack, thereby improving the overall strength of the road surface. The base plate is also equipped with a sealing component, which includes a lifting frame that is slidably connected to the base plate. Multiple U-shaped support frames are evenly arranged on the lifting frame, and at least one slider is slidably connected to each support frame. A pressure plate that can seal the opening of the road surface crack is arranged below the slider, and the sides of adjacent pressure plates are in contact.

[0005] Preferably, guide posts are fixedly connected to the four corners of the upper surface of the base plate, and the four corners of the lifting frame are slidably sleeved on the corresponding guide posts. The guide posts are set perpendicular to the upper surface of the base plate. The four guide posts enable the lifting frame to slide more stably on the base plate. A bracket is fixedly connected to the base plate, and an electric push rod is fixedly installed on the bracket. The output shaft of the electric push rod is connected to the side wall of the lifting frame. There are two brackets, which are set on both sides of the base plate. Each bracket is equipped with an electric push rod. The two electric push rods can operate synchronously to drive the lifting frame to slide up or down.

[0006] Preferably, a connecting post is fixedly connected to the pressure plate, the connecting post is slidably sleeved on the slider, a spring for pressing the pressure plate is connected to the connecting post and located between the slider and the pressure plate, and a baffle is fixedly connected to the end of the connecting post away from the pressure plate.

[0007] Preferably, the pressure plate and the connecting column are provided with through holes that run vertically through each other, and a plug rod is movably inserted into the through hole.

[0008] Preferably, each support frame includes two crossbars and a fixed plate. The two crossbars are arranged in parallel, and one end of the two crossbars is connected through the fixed plate. A first bolt is provided on the side wall of the fixed plate, and the threaded end of the first bolt is engaged with the side wall of the lifting frame.

[0009] Preferably, the upper end of the grouting pipe is connected to a grouting guide assembly for injecting and introducing polyurethane into the grouting pipe. The grouting guide assembly includes a conveying pipe connected to the upper end of the grouting pipe and communicating with the inner cavity of the grouting pipe. The upper end of the conveying pipe is simultaneously connected to multiple material pipes, with a total of three material pipes. The material pipes are attached to a support, and the ends of the three material pipes away from the conveying pipe are connected to a conveyor. The three material pipes can individually convey isocyanate, polyether polyol, and catalyst. The inside of the conveying pipe is provided with mixing blades for mixing isocyanate, polyether polyol, and catalyst.

[0010] Preferably, the lower end of the grouting pipe is open. After the grouting pipe is removed, both the upper and lower ends of the grouting pipe are open. One end can be rinsed with cleaning fluid to facilitate the removal of polyurethane inside the grouting pipe from the other end, thereby improving the cleaning efficiency of the grouting pipe.

[0011] A method for grouting repair based on composite polymers, comprising the following steps:

[0012] Step 1: Place the base plate on top of the crack. After determining and marking the placement of the base plate and the position of the grouting pipe, remove the base plate and drill a hole at the marked position of the grouting pipe. The hole should be on the crack so that the grouting pipe can be inserted into the hole and placed inside the crack.

[0013] Step 2: Place the base plate back into the marked position, connect the grouting pipe to the delivery pipe, and then insert the grouting pipe into the borehole through the insertion hole. At the same time, use the slider to press the pressure plate against the opening of the crack.

[0014] Step 3: Except for the two plugs furthest from the grouting pipe, remove the other plugs from the through hole and use the through hole to penetrate the polyurethane-filled crack;

[0015] Step 4: Use the grouting guide assembly to inject the mixed polyurethane into the grouting pipe, causing the polyurethane in the grouting pipe to be injected into the crack. Observe whether polyurethane gushes out from inside the through hole. When polyurethane appears in the through hole, insert a plug rod into the through hole, indicating that the crack below the through hole has been filled with polyurethane. After all the through holes are plugged with plug rods, stop injecting polyurethane into the crack.

[0016] Step 5: Remove the base plate and wait for the polyurethane foam injected into the crack to react and cure. The road crack repair is then complete.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses a lifting frame to slide downwards, which in turn slides the support frame downwards. Each slider slides downwards synchronously, and all the pressure plates slide downwards synchronously. Subsequently, all the pressure plates can seal the opening of the road surface crack below the base plate. At this time, the grouting pipe is inserted into the crack, and polyurethane is injected into the crack from the outlet hole. In this way, because the road surface crack is sealed by the pressure plates, the polyurethane injected into the crack can be prevented from flowing out of the crack opening in advance before the crack is filled, ensuring that the crack can be filled with polyurethane. This can improve the quality of polyurethane repair of road surface cracks, thereby improving the overall strength of the road surface. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention (I).

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention (II).

[0020] Figure 3 This is a schematic diagram of the overall structure of the present invention (III).

[0021] Figure 4 This is an exploded view of the base plate, grouting pipe, and lifting frame of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the closed component of the present invention;

[0023] Figure 6 This is an exploded view of the slider, pressure plate, and plug rod of the present invention;

[0024] Figure 7This is an exploded cross-sectional view of the slider, pressure plate, connecting column and plug rod of the present invention.

[0025] Figure 8 This is an exploded cross-sectional view of the base plate, insertion hole, grouting pipe, and delivery pipe of the present invention.

[0026] Figure 9 This is a schematic diagram of the grouting pipe of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of the grouting pipe and the delivery pipe of the present invention;

[0028] Figure 11 This is a schematic diagram of the structure of the conveying pipe and the material pipe of the present invention.

[0029] In the diagram: 1. Base plate, 2. Insertion hole, 3. Grouting pipe, 301. Liquid outlet, 302. Circular groove, 4. Sealing assembly, 401. Lifting frame, 402. Support frame, 4021. Crossbar, 4022. Fixing plate, 403. Sliding block, 404. Pressure plate, 5. Grouting assembly, 501. Conveying pipe, 502. Material pipe, 503. Mixing blade, 6. Guide column, 7. Bracket, 8. Connecting column, 9. Spring, 10. Baffle, 11. Through hole, 12. Blocking rod, 13. Electric push rod, 14. First bolt, 15. Second bolt, 16. Lifting ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-11 This invention provides a technical solution: a grouting repair system based on composite polymers and its application method, including a base plate 1, such as... Figure 1As shown, the upper surface of the base plate 1 is provided with multiple lifting rings 16. The lifting rings 16 are used in conjunction with external steel wire ropes and suspension components to facilitate the movement of the base plate 1. An insertion hole 2 is provided in the middle of the base plate 1. A hollow grouting pipe 3 for injecting polyurethane into the road surface cracks is inserted into the insertion hole 2. Multiple outlet holes 301 are evenly provided on the side wall of the grouting pipe 3. When repairing road surface cracks, the grouting pipe 3 is inserted into the crack. At this time, polyurethane is injected into the crack from the outlet holes 301. In this way, through the foaming reaction of polyurethane, the polyurethane material injected into the crack... The expansion and increase in volume enable the filling, repair, and connection of road surface cracks, thereby improving the overall strength of the road surface. The base plate 1 is also provided with a sealing component 4, which includes a lifting frame 401. The lifting frame 401 is slidably connected to the base plate 1. Multiple U-shaped support frames 402 are evenly arranged on the lifting frame 401. At least one slider 403 (or multiple sliders) is slidably connected to each support frame 402. A pressure plate 404 that can seal the opening of the road surface crack is provided below the slider 403. The sides of adjacent pressure plates 404 are in contact.

[0032] like Figure 1 As shown, the support frame 402 is symmetrically distributed around the grouting pipes 3. When repairing road surface cracks, the base plate 1 is placed above the road surface cracks, and the support frame 402 is positioned approximately perpendicular to the direction of the road surface crack (e.g., Figure 2 , 3 As shown, the road surface crack is located below each support frame 402. The insertion hole 2 is directly opposite the road surface crack. Then, each slider 403 is slid, causing the slider 403 to slide along the pressure plate 404 on the support frame 402. This allows the pressure plate 404 to move directly above the crack. When each pressure plate 404 has slid directly above the crack, the section of the crack opening below the base plate 1 will be completely covered by the pressure plates 404. In this state, the lifting frame 401 is driven to slide downwards, and the lifting frame 401 will slide downwards along with the support frame 402. Each slider 403 will then slide downwards. Synchronous sliding allows all the pressure plates 404 to slide downwards simultaneously, sealing the opening of the road surface crack below the base plate 1. At this point, the grouting pipe 3 is inserted into the crack, and polyurethane is injected into the crack from the outlet hole 301. Because the road surface crack is sealed by the pressure plates 404, the polyurethane injected into the crack is prevented from flowing out prematurely before the crack is fully filled, ensuring that the crack is filled with polyurethane. This improves the quality of polyurethane repair for road surface cracks and enhances the overall strength of the road surface.

[0033] like Figure 4As shown, in order to drive the lifting frame 401 to slide on the base plate 1 and to facilitate the stable sliding of the lifting frame 401 on the base plate 1, specifically, guide posts 6 are fixedly connected to the four corners of the upper surface of the base plate 1. The four corners of the lifting frame 401 are slidably sleeved on the corresponding guide posts 6. The guide posts 6 are set perpendicular to the upper surface of the base plate 1. In this way, the four guide posts 6 can make the lifting frame 401 slide more stably on the base plate 1. A bracket 7 is fixedly connected to the base plate 1, and an electric push rod 13 is fixedly installed on the bracket 7. The output shaft of the electric push rod 13 is connected to the side wall of the lifting frame 401, such as... Figure 1 As shown, there are two brackets 7, which are set on both sides of the base plate 1. Each bracket 7 is equipped with an electric push rod 13. The two electric push rods 13 can operate synchronously to drive the lifting frame 401 to slide up or down.

[0034] like Figure 6 , 7 As shown, in the case of uneven road surface, in order to adapt multiple pressure plates 404 to the uneven road surface and seal the cracks on the uneven road surface, specifically, a connecting post 8 is fixedly connected to the pressure plate 404, the connecting post 8 is slidably sleeved on the slider 403, and a spring 9 for pressing the pressure plate 404 is connected to the connecting post 8 and located between the slider 403 and the pressure plate 404. A baffle 10 is fixedly connected to the end of the connecting post 8 away from the pressure plate 404. The pressure plate 404, the connecting post 8, and the baffle 10 are an integral structure. The slider 403 is in a position... Between the pressure plate 404 and the baffle 10, under the pressure of the spring 9, the baffle 10 abuts against the side wall of the slider 403. When the sliding lifting frame 401 causes the slider 403 to move downward with the pressure plate 404, when the road surface is uneven, the higher road surface will push against the pressure plate 404 in the opposite direction, causing the pressure plate 404 to compress the spring 9 and slide relative to the slider 403. In this way, the surface of the lower surface of each pressure plate 404 that is joined together to seal the crack opening is adapted to the uneven surface of the road. This allows multiple pressure plates 404 to adapt to the uneven road surface so as to seal the crack opening on the uneven road surface.

[0035] like Figure 6 , 7 As shown, in order to determine whether the cracks are completely filled with polyurethane, specifically, the pressure plate 404 and the connecting column 8 are provided with through holes 11 that extend vertically. A plug rod 12 is movably inserted into the through hole 11, as shown. Figure 7As shown, the upper end of the through hole 11 is provided with an internal thread, and the upper end of the plug rod 12 is provided with an external thread and a hexagonal head for driving the plug rod 12 to rotate. The internal thread on the through hole 11 is compatible with the external thread on the plug rod 12. When the crack opening is sealed with the pressure plate 404 and polyurethane is injected into the crack using the grouting pipe 3, all the plug rods 12 in the through holes 11 are driven. During the polyurethane injection into the crack, it is observed whether polyurethane flows out of the through hole 11. When polyurethane appears in the through hole 11, the plug rod 12 is inserted into the through hole 11 and fixed in the through hole 11 using the internal and external threads. This indicates that the crack below the through hole 11 has been filled with polyurethane. Since the through hole 11 is blocked, the polyurethane will flow to other parts of the crack. After all the through holes 11 are blocked with the plug rod 12, the injection of polyurethane into the crack is stopped, and then the base plate 1 is removed. After the polyurethane injected into the crack foams and solidifies, the road crack repair is completed.

[0036] like Figure 5 As shown, in order to increase the number of sliders 403 on the support frame 402 (i.e., to increase the number of pressure plates 404 on the same support frame 402), specifically, each support frame 402 includes two crossbars 4021 and a fixing plate 4022. The two crossbars 4021 are arranged in parallel, and one end of the two crossbars 4021 is connected through the fixing plate 4022. A first bolt 14 is provided on the side wall of the fixing plate 4022. The threaded end of the first bolt 14 is engaged with the side wall of the lifting frame 401. The side wall of the lifting frame 401 is provided with insertion holes for inserting the crossbars 4021. When the support frame 402 is installed on the lifting frame 401, align the ends of the two crossbars 4021 away from the fixing plate 4022 with the insertion holes on the lifting frame 401, push the fixing plate 4022 to make it fit against the lifting frame 401. At this time, the two crossbars 4021 are installed on the lifting frame 401 and fixed to the side wall of the lifting frame 401 by the first bolt 14, thus fixing the support frame 402. When it is necessary to add a slider 403 to the support frame 402, unscrew the first bolt 14, and then pull the fixing plate 4022, causing the crossbars 4021 to be pulled to the desired position. Figure 5 In the state shown, the slider 403 can be installed from the end of the crossbar 4021 away from the fixed plate 4022 onto the crossbar 4021. After the slider 403 is installed, push the fixed plate 4022 to make it fit against the lifting frame 401. Then, use the first bolt 14 to screw it onto the side wall of the lifting frame 401 to complete the operation of adding the slider 403 to the support frame 402.

[0037] Adding multiple sliders 403 to the same support frame 402 can seal the opening of road surface cracks that open along the length of the crossbar 4021, which helps to seal the crack openings more thoroughly.

[0038] Specifically, the upper end of the grouting pipe 3 is connected to a grouting guide assembly 5 for injecting and introducing polyurethane into the grouting pipe 3. The grouting guide assembly 5 includes a conveying pipe 501, which is connected to the upper end of the grouting pipe 3 and communicates with the inner cavity of the grouting pipe 3. The upper end of the conveying pipe 501 is simultaneously connected to multiple material pipes 502, with three material pipes 502. The material pipes 502 are attached to a support 7, and the ends of the three material pipes 502 away from the conveying pipe 501 are connected to a conveyor. Each of the three material pipes 502 can individually convey isocyanate, polyether polyol, and catalyst. The interior of the conveying pipe 501 is provided with a mechanism for conveying isocyanate... The mixing blade 503 mixes isocyanate, polyether polyol and catalyst. When the material pipe 502 simultaneously injects isocyanate, polyether polyol and catalyst into the inside of the delivery pipe 501, the isocyanate, polyether polyol and catalyst mix and flow downward. Under the action of the mixing blade 503, the isocyanate, polyether polyol and catalyst mix and flow irregularly, so as to achieve full mixing of isocyanate, polyether polyol and catalyst to form polyurethane. Then the polyurethane will flow from the delivery pipe 501 to the grouting pipe 3. Finally, the polyurethane can be injected into the crack from the grouting pipe 3. Of course, if other materials need to be added, there can be more material pipes 502 in the structure of this application.

[0039] In addition, in order to separate the grouting pipe 3 from the delivery pipe 501, the upper end of the grouting pipe 3 is inserted into the lower end of the delivery pipe 501, and an annular groove 302 is provided on the upper side wall of the grouting pipe 3. Multiple second bolts 15 are provided on the lower side wall of the delivery pipe 501. After the upper end of the grouting pipe 3 is inserted into the lower end of the delivery pipe 501, the second bolts 15 are turned. After the threaded end of the second bolts 15 is inserted into the annular groove 302, the grouting pipe 3 and the delivery pipe 501 can be fixed. When it is necessary to disassemble the grouting pipe 3, simply turn the threaded end of the second bolts 15 out of the annular groove 302, and the grouting pipe 3 and the delivery pipe 501 can be separated.

[0040] like Figure 9 As shown, in order to facilitate cleaning of the grouting pipe 3, specifically, the lower end of the grouting pipe 3 is open. After the grouting pipe 3 is removed, both the upper and lower ends of the grouting pipe 3 are open. One end is rinsed with cleaning fluid, which facilitates the removal of polyurethane inside the grouting pipe 3 from the other end, thereby improving the cleaning efficiency of the grouting pipe 3. The polyurethane inside the grouting pipe 3 can also flow out from the lower end of the grouting pipe 3 into the crack, which can be used to fill the deep part of the crack with polyurethane.

[0041] A method for grouting repair based on composite polymers, comprising the following steps:

[0042] Step 1: Place the base plate 1 above the crack, determine the placement of the base plate 1 and the position of the grouting pipe 3, and mark them (e.g., Figure 3 (As shown in the drilling position A), remove the base plate 1, and drill a hole at the marked position of the grouting pipe 3. The hole is on the crack so that the grouting pipe 3 can be inserted into the hole and placed inside the crack.

[0043] In addition, the positions of the two pressure plates 404 furthest from the grouting pipe 3 relative to the crack are marked, and holes are drilled at the marked positions of the two pressure plates 404 (e.g., Figure 3 As shown in the drilling positions B1 and B2, long plug rods 12 are installed in the through holes 11 on the two pressure plates 404. The plug rods 12 can be inserted downwards into the drill holes through the through holes 11, thereby blocking both sides of a section of crack below the base plate 1 (e.g., Figure 3 The crack between holes B1 and B2 (as shown) prevents polyurethane from overflowing into the crack, thus allowing for targeted treatment of cracks directly below the base plate 1 (such as...). Figure 3 The crack between boreholes B1 and B2 shown in the diagram was filled with polyurethane.

[0044] Step 2: Place the base plate 1 back in the marked position, connect the grouting pipe 3 to the delivery pipe 501, and then insert the grouting pipe 3 into the borehole through the insertion hole 2 (e.g., Figure 3 (As shown in the drill hole position A), at the same time, slider 403 is used to press pressure plate 404 against the opening of the crack (as shown in the figure). Figure 2 (as shown)

[0045] Step 3: Except for the two plug rods 12 furthest from the grouting pipe 3, remove the other plug rods 12 from the through hole 11 and use the through hole 11 to penetrate the polyurethane-filled crack;

[0046] Step 4: Use the grouting component 5 to inject the mixed polyurethane into the grouting pipe 3, causing the polyurethane in the grouting pipe 3 to be injected into the crack. Observe whether polyurethane flows out of the through hole 11. When polyurethane appears in the through hole 11, use the plug rod 12 to insert into the through hole 11, indicating that the crack below the through hole 11 has been filled with polyurethane. After all the through holes 11 are plugged with the plug rod 12, stop injecting polyurethane into the crack.

[0047] Step 5: Remove the base plate 1. After the polyurethane foam injected into the crack reacts and cures, the road crack repair is complete.

[0048] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grouting repair system based on composite polymers, comprising a base plate (1), characterized in that: An insertion hole (2) is provided in the middle of the base plate (1). A hollow grouting pipe (3) for injecting polyurethane into the road surface cracks is inserted into the insertion hole (2). Multiple outlet holes (301) are evenly provided on the side wall of the grouting pipe (3). A sealing component (4) is also provided on the base plate (1). The sealing component (4) includes a lifting frame (401). The lifting frame (401) is slidably connected to the base plate (1). Multiple U-shaped support frames (402) are evenly provided on the lifting frame (401). At least one slider (403) is slidably connected on each support frame (402). Below the slider (403) is a... A pressure plate (404) capable of sealing the opening of a road surface crack is provided. The sides of adjacent pressure plates (404) are in contact. A connecting post (8) is fixedly connected to the pressure plate (404). The connecting post (8) is slidably sleeved on the slider (403). A spring (9) for pressing the pressure plate (404) is connected to the connecting post (8) between the slider (403) and the pressure plate (404). A baffle (10) is fixedly connected to the end of the connecting post (8) away from the pressure plate (404). A through hole (11) is opened on the pressure plate (404) and the connecting post (8). A plug rod (12) is movably inserted into the through hole (11). The upper end of the grouting pipe (3) is connected to a grouting guide assembly (5) for injecting polyurethane into the grouting pipe (3). The grouting guide assembly (5) includes a conveying pipe (501), which is connected to the upper end of the grouting pipe (3) and communicates with the inner cavity of the grouting pipe (3). The upper end of the conveying pipe (501) is also connected to multiple material pipes (502). The inside of the conveying pipe (501) is provided with mixing blades (503) for mixing isocyanate, polyether polyol and catalyst.

2. The grouting repair system based on composite polymer according to claim 1, characterized in that: The four corners of the upper surface of the base plate (1) are fixedly connected with guide posts (6), and the four corners of the lifting frame (401) are slidably sleeved on the corresponding guide posts (6). A bracket (7) is fixedly connected to the base plate (1), and an electric push rod (13) is fixedly installed on the bracket (7). The output shaft of the electric push rod (13) is connected to the side wall of the lifting frame (401).

3. The grouting repair system based on composite polymer according to claim 1, characterized in that: Each support frame (402) includes two crossbars (4021) and a fixing plate (4022). One end of the two crossbars (4021) is connected through the fixing plate (4022), and a first bolt (14) is provided on the side wall of the fixing plate (4022). The threaded end of the first bolt (14) is engaged with the side wall of the lifting frame (401).

4. The grouting repair system based on composite polymer according to claim 1, characterized in that: The lower end of the grouting pipe (3) is open.

5. The method of using the grouting repair system based on composite polymers according to any one of claims 1-4, characterized in that: The grouting repair method based on composite polymers includes the following steps: Step 1: Place the base plate (1) above the crack, determine the placement position of the base plate (1) and the position of the grouting pipe (3) and mark them, then remove the base plate (1), drill a hole at the marked position of the grouting pipe (3), the hole is on the crack, so that the grouting pipe (3) can be inserted into the hole and be inside the crack. Step 2: Place the base plate (1) back into the marked position, connect the grouting pipe (3) to the delivery pipe (501), and then insert the grouting pipe (3) into the borehole from the insertion hole (2), while sliding the slider (403) so that the pressure plate (404) presses against the opening of the crack; Step 3: Remove the plug rod (12) from the through hole (11) and use the through hole (11) to penetrate the polyurethane-filled crack; Step 4: Use the grouting component (5) to inject the mixed polyurethane into the grouting pipe (3), so that the polyurethane in the grouting pipe (3) is injected into the crack. Observe whether polyurethane flows out inside the through hole (11). When polyurethane appears in the through hole (11), use the plug rod (12) to insert into the through hole (11), indicating that the crack below the through hole (11) has been filled with polyurethane. After all the through holes (11) are plugged with the plug rod (12), stop injecting polyurethane into the crack. Step 5: Remove the base plate (1). After the polyurethane foam injected into the crack reacts and cures, the road surface crack repair is completed.

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