A grouting and sealing device for cracks in water conservancy engineering dams and its application method

Abstract

This invention proposes a grouting and sealing device for cracks in hydraulic engineering dams and its application method, relating to the field of dam crack grouting technology. It includes a grouting machine with a grout tank and a grouting hose connected to the grout tank. A rigid grouting pipe is connected to the end of the grouting hose furthest from the grout tank. A dam vibration mechanism is installed on the rigid grouting pipe to vibrate the dam on both sides of the crack. A striking mechanism is also installed on the rigid grouting pipe. This invention, through the rigid grouting pipe, dam vibration mechanism, and striking mechanism, enables vibration of the dam itself and various parts inside the crack borehole during grout injection, facilitating grout filling to all parts of the dam crack, reducing residual air in the grout, and ensuring the quality of grout filling.

Description

Technical Field

[0001] This invention relates to the field of grouting technology for dam cracks, and more particularly to a grouting and sealing device for dam cracks in water conservancy projects and its application method. Background Technology

[0002] Hydraulic dams are subjected to long-term external forces such as water pressure, temperature stress, uneven soil settlement, and wet-dry cycles. The concrete structure and impermeable layer of the dam are prone to developing cracks of varying depths and shapes. If these cracks are not properly sealed, water will seep into the dam, eroding its structure and reducing its impermeability. This not only causes seepage damage but also gradually undermines the overall stability of the dam, potentially threatening its operational safety. Therefore, grouting to seal these cracks is a crucial step in dam repair.

[0003] Currently, when grouting cracks in dams, the usual method is to drill holes at the cracks and then inject reinforcing grout into the drilled holes under high pressure using grouting equipment. The grouting pressure forces the grout to fill the air in the cracks, and the cracks are sealed after the grout solidifies. However, in reality, natural cracks have complex shapes, with many narrow cracks, tortuous fissures, and deep dead corners. The grout has limited fluidity, and under simple static pressure, the grout is difficult to penetrate into the interior of the fine cracks. Air bubbles and unfilled cavities are easily left in the cracks, forming hidden leakage channels and causing repeated leakage after crack repair. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a grouting and sealing device for cracks in water conservancy engineering dams and its usage method.

[0005] The technical solution adopted by the present invention is as follows: In the first aspect, the present invention proposes a grouting and sealing device for cracks in dams of water conservancy projects, including a grouting machine, a grout tank installed on the grouting machine, a grouting hose connected to the grout tank installed on the grouting machine, and a rigid grouting pipe connected to the end of the grouting hose away from the grout tank.

[0006] The rigid grouting pipe is equipped with a dam vibration mechanism, which is used to vibrate the dam on both sides of the crack.

[0007] The rigid grouting pipe is equipped with a striking mechanism, which is used to strike the inner wall of the crack borehole and cause the inner wall of the dam crack to vibrate.

[0008] Preferably, the dam vibration mechanism includes a vibration seat, an angle adjustment structure, and a vibration structure; the vibration seat is installed on the dam by bolts.

[0009] The angle adjustment structure is used to adjust the tilt angle between the rigid grouting pipe and the vibrating seat.

[0010] The vibration structure is used to impact the vibration seat and cause the vibration seat to vibrate, and then the vibration seat transmits the vibration to the dam.

[0011] Preferably, the angle adjustment structure includes a deflecting hemispherical block; a hemispherical groove is provided in the vibration seat, the deflecting hemispherical block is movably installed in the hemispherical groove, and the rigid grouting pipe passes through the deflecting hemispherical block.

[0012] Preferably, the vibration structure includes a vibration impact rod and a drive assembly; the deflecting hemisphere has a vibration hole that slides with the vibration impact rod.

[0013] The drive assembly is used to drive the vibration impact rod to slide back and forth in the vibration hole. During the reciprocating sliding process of the vibration impact rod, the end of the vibration impact rod will continuously impact the vibration seat.

[0014] Preferably, the drive assembly includes a vibration motor, a main shaft, and a drive disk; the vibration motor is installed inside the deflection hemisphere, the main shaft is installed on the output shaft of the vibration motor, the drive disk is fitted onto the main shaft, the drive disk is rotatably installed inside the deflection hemisphere, an annular drive groove is provided on one side of the drive disk, and a first sliding shaft is fixedly connected to one side of the vibration impact rod, the first sliding shaft slides in the annular drive groove.

[0015] Preferably, the striking mechanism includes a striking rod and a transmission structure; the outer periphery of the rigid grouting pipe is provided with a plurality of striking holes that slide in cooperation with the striking rod, and the striking rod is slidably disposed in the striking holes.

[0016] The transmission structure is used to convert the rotational motion of the spindle into the reciprocating sliding motion of the striking rod within the striking hole.

[0017] Preferably, the transmission structure includes a first bevel gear, a second bevel gear, a rotating shaft, a drive ring, a connecting rod, and a reciprocating drive assembly; a stabilizing block is fixedly installed inside the rigid grouting pipe, the main shaft passes through the rigid grouting pipe and the stabilizing block, the first bevel gear is rotatably installed inside the stabilizing block and is fitted onto the main shaft, the second bevel gear is rotatably installed inside the stabilizing block and meshes with the first bevel gear, one end of the rotating shaft is connected to the second bevel gear, an annular notch is provided on the inner wall of the rigid grouting pipe, the drive ring is slidably installed in the annular notch, and both ends of the connecting rod are respectively connected to the outer circumference of the rotating shaft and the inner wall of the drive ring.

[0018] The reciprocating drive assembly is used to convert the rotational motion of the drive ring into the reciprocating sliding motion of the striking rod within the striking hole.

[0019] Preferably, the reciprocating drive assembly includes a lifting block, a second sliding shaft, and a third sliding shaft; the rigid grouting pipe has a lifting groove that slides with the lifting block; the second sliding shaft is connected to the side of the lifting block near the drive ring; the outer circumference of the drive ring has an annular wave groove; the second sliding shaft is slidably disposed in the annular wave groove; the third sliding shaft passes through the striking rod; the side of the lifting block away from the drive ring has a movable groove that slides with the striking rod; both inner walls of the movable groove have inclined sliding grooves; and the two ends of the third sliding shaft slide in the two inclined sliding grooves respectively.

[0020] Secondly, the present invention also proposes a method for using a grouting and sealing device for cracks in dams of water conservancy projects, including the following steps: S1, crack pretreatment: survey the cracks in the dam to be repaired, determine the drilling location and drilling angle according to the crack direction, depth and width, drill grouting holes along the crack extension direction, and clean the floating dust, gravel and debris inside the holes to ensure that the holes are clean and unobstructed.

[0021] S2. Device positioning and installation: Insert the rigid grouting pipe into the grouting borehole, and fix the vibrating seat to the surface of the dam body around the grouting borehole with bolts. Combined with the borehole inclination angle, adjust the angle by deflecting the hemispherical block in the hemispherical groove of the vibrating seat so that the rigid grouting pipe matches the borehole angle, thus completing the device positioning and fixing.

[0022] S3. Grout preparation and filling: Based on the requirements for seepage prevention and reinforcement of dam cracks, prepare a suitable grout and pour the prepared grout evenly into the grout tank. Check the connection and sealing of the grouting hose and rigid grouting pipe to avoid grout leakage during the grouting process.

[0023] S4. Vibration and Impact Pretreatment: Start the vibration motor, drive the drive disc to rotate through the main shaft, and use the cooperation of the annular drive groove and the first sliding shaft to drive the vibration impact rod to slide back and forth and continuously impact the vibration seat, so that the dam body as a whole generates low-frequency vibration; at the same time, the main shaft drives the drive ring to rotate through the transmission of the first bevel gear and the second bevel gear, and in conjunction with the linkage of the annular wave groove, the lifting block and the inclined slide groove, drives multiple sets of impact rods to reciprocate and extend, continuously impacting and vibrating the inner wall of the borehole, clearing the fine cracks inside the cracks and expelling the air trapped in the cracks.

[0024] S5. Synchronous grouting and vibration sealing: Start the grouting machine and inject the grout in the grout tank into the cracks of the dam under high pressure through the grouting hose and rigid grouting pipe. The vibration motor keeps working continuously throughout the grouting process. The overall vibration of the dam body and the local knocking vibration of the borehole wall are combined to make the grout fully penetrate into the narrow cracks, tortuous fissures and deep dead corners, filling all the cavities inside the cracks.

[0025] S6. Final Curing: After the grouting operation is completed, turn off the grouting machine and the vibrating motor in sequence, and let the equipment stop vibrating. After the grout at the borehole and crack ends has initially set, remove the vibrating seat and the rigid grouting pipe, seal and smooth the grouting ends, and cure the grouting area of ​​the dam crack according to the process requirements until the grout has completely solidified and the crack sealing operation is completed.

[0026] Preferably, in steps S4 and S5, the vibratory motor maintains a constant speed, the impact frequency of the vibratory impact rod is 20-50 times / second, the reciprocating impact frequency of the striking rod is synchronized with the impact frequency of the vibratory impact rod, and the grouting pressure is controlled at 0.3-0.8 MPa.

[0027] In step S6, the initial setting time of the grout shall not be less than 30 minutes, and the curing time shall not be less than 72 hours. During the curing process, the grouting area shall be kept moist without water accumulation and without external disturbance.

[0028] Compared with the prior art, the present invention has the following beneficial effects: by setting up a rigid grouting pipe, a dam vibration mechanism and a hammering mechanism, the dam itself can be vibrated when grout is injected into the dam cracks, and the dam itself and the crack boreholes can be vibrated, which facilitates the filling of grout into all parts of the dam cracks, reduces residual air in the grout and ensures the quality of the grout filling. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a grouting and sealing device for cracks in a water conservancy dam, as proposed in this invention.

[0030] Figure 2 This is a side sectional view of the vibrating seat in a grouting and sealing device for cracks in a water conservancy dam, as proposed in this invention.

[0031] Figure 3 This is a partial side cross-sectional view of the rigid grouting pipe in a grouting and sealing device for cracks in a water conservancy dam proposed in this invention.

[0032] Figure 4 This is a cross-sectional view of the end face of the rigid grouting pipe in a grouting and sealing device for cracks in a water conservancy dam proposed in this invention.

[0033] Figure 5 This invention proposes a grouting and sealing device for cracks in water conservancy engineering dams. Figure 2 Enlarged view of point A in the middle.

[0034] Figure 6 This invention proposes a grouting and sealing device for cracks in water conservancy engineering dams. Figure 3 Enlarged view of section B in the middle.

[0035] Figure 7This is a schematic diagram of the annular drive groove on the side of the drive disc in a grouting and sealing device for cracks in a water conservancy dam proposed in this invention.

[0036] Figure 8 This is an unfolded view of the annular wave groove on the outer periphery of the drive ring in a grouting and sealing device for cracks in a water conservancy dam proposed in this invention.

[0037] Figure 9 This is a schematic diagram of the striking rod in a grouting and sealing device for cracks in a water conservancy dam, as proposed in this invention.

[0038] Figure 10 This is a three-dimensional sectional view of the lifting block in a grouting and sealing device for cracks in a water conservancy dam, as proposed in this invention.

[0039] In the diagram: 1. Grouting machine; 3. Grouting tank; 4. Grouting hose; 5. Rigid grouting pipe; 6. Vibrating seat; 7. Deflecting hemispherical block; 8. Vibrating impact rod; 9. Vibrating motor; 10. Main shaft; 11. Drive disc; 12. Annular drive groove; 13. Striking rod; 14. First bevel gear; 15. Second bevel gear; 16. Rotating shaft; 17. Drive ring; 18. Connecting rod; 19. Stabilizing block; 20. Lifting block; 21. Second sliding shaft; 22. Third sliding shaft; 23. Annular wave groove; 24. Movable groove; 25. Inclined chute. Detailed Implementation

[0040] Reference Figures 1-10 This invention proposes a grouting and sealing device for cracks in a hydraulic engineering dam, comprising a grouting machine 1, a grout tank 3 mounted on the grouting machine 1, and a grouting hose 4 connected to the grout tank 3. A rigid grouting pipe 5 is connected to the end of the grouting hose 4 furthest from the grout tank 3. A dam vibration mechanism is mounted on the rigid grouting pipe 5 to vibrate the dam on both sides of the crack. A striking mechanism is mounted on the rigid grouting pipe 5 to strike the inner wall of the drilled hole in the crack, causing the inner wall of the dam crack to vibrate. In actual use, grouting holes are drilled according to the crack condition on the dam, and then the rigid grouting hose 4 is used to seal the crack. The grouting pipe 5 is inserted into the grouting borehole, and the grout is poured into the grout tank 3. Then, the grout is pumped into the grouting hose 4 and then into the rigid grouting pipe 5, and then into the dam crack. While the grout is being injected into the dam crack, the dam vibration mechanism vibrates the dam. Vibrating the dam usually helps to better fill the grout into all parts of the dam crack. At the same time, the hammering mechanism hammers the inner wall of the borehole to generate vibration, so that the grout is hammered and vibrated at all depths of the dam crack. This allows the grout injected into the dam crack to better fill the dead corners, narrow gaps, and tortuous cracks in the crack.

[0041] like Figure 1 and Figure 2As shown, the dam vibration mechanism includes a vibration seat 6, an angle adjustment structure, and a vibration structure. The vibration seat 6 is bolted to the dam. The angle adjustment structure is used to adjust the inclination angle between the rigid grouting pipe 5 and the vibration seat 6. The vibration structure is used to impact the vibration seat 6 and cause it to vibrate. The vibration seat 6 then transmits the vibration to the dam. In actual use, although the dam cracks spread downwards, they do not spread vertically downwards. The dam cracks may spread at an angle. When injecting grout, it is necessary to drill at an angle according to the trend of the dam cracks, and then insert the rigid grouting pipe 5 at an angle into the grouting borehole. The angle adjustment structure is used to adjust the inclination angle between the rigid grouting pipe 5 and the vibration seat 6. However, it is necessary to ensure that the bottom of the vibration seat 6 is attached to the bank of the dam to ensure that the vibration of the vibration structure can be transmitted to the dam through the vibration seat 6, ensuring the vibration effect and thus ensuring that the grout can be better injected into the dam cracks.

[0042] like Figure 2 As shown, the angle adjustment structure includes a deflecting hemispherical block 7; a hemispherical groove is provided in the vibration seat 6, the deflecting hemispherical block 7 is movably installed in the hemispherical groove, the rigid grouting pipe 5 passes through the deflecting hemispherical block 7, the spherical surface of the deflecting hemispherical block 7 can slide on the inner wall of the hemispherical groove, so that the deflecting hemispherical block 7 will not detach in the hemispherical groove, ensuring that the spherical surface of the deflecting hemispherical block 7 is always in contact with the inner wall of the hemispherical groove. When the deflecting hemispherical block 7 deflects, it will drive the rigid grouting pipe 5 to rotate synchronously and deflect.

[0043] like Figure 2 and Figure 5 As shown, the vibration structure includes a vibration impact rod 8 and a drive assembly. A vibration hole is provided on the deflecting hemispherical block 7 to slide in conjunction with the vibration impact rod 8. The drive assembly is used to drive the vibration impact rod 8 to slide back and forth in the vibration hole. During the reciprocating sliding of the vibration impact rod 8, the end of the vibration impact rod 8 will continuously impact the vibration seat 6. In actual use, during the grouting process, the drive assembly drives the vibration impact rod 8 to reciprocate and impact the vibration seat 6, causing the vibration seat 6 to vibrate. The vibration seat 6 then transmits the vibration to the dam, thereby vibrating the grout in the dam cracks, so that the grout can better fill the dam cracks.

[0044] like Figure 2 , Figure 5 and Figure 7As shown, the drive assembly includes a vibration motor 9, a main shaft 10, and a drive disk 11. The vibration motor 9 is installed inside the deflecting hemispherical block 7, the main shaft 10 is installed on the output shaft of the vibration motor 9, and the drive disk 11 is fitted onto the main shaft 10. The drive disk 11 is rotatably installed inside the deflecting hemispherical block 7. An annular drive groove 12 is provided on one side of the drive disk 11. A first sliding shaft is fixedly connected to one side of the vibration impact rod 8. The first sliding shaft slides in the annular drive groove 12. In actual use, the vibration motor 9 drives the main shaft 10 to rotate, and then the main shaft 10 drives the drive disk 11 to rotate. Since the first sliding shaft slides in the annular drive groove 12, the first sliding shaft and the vibration impact rod 8 reciprocate up and down, realizing continuous vibration of the dam during grouting operations and ensuring the grouting effect.

[0045] like Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 9 As shown, the striking mechanism includes a striking rod 13 and a transmission structure. The outer periphery of the rigid grouting pipe 5 is provided with multiple striking holes that slide in conjunction with the striking rod 13. The striking rod 13 is slidably disposed in the striking holes. The transmission structure is used to convert the rotational motion of the main shaft 10 into the reciprocating sliding motion of the striking rod 13 in the striking holes. In actual use, the transmission structure converts the rotational motion of the main shaft 10 into the reciprocating sliding motion of the striking rod 13 in the striking holes, thereby causing the end of the striking rod 13 to strike the inner wall of the borehole in the dam crack to generate vibration, which facilitates the vibration filling of the grout injected into the dam crack, better removes air from the grout, and facilitates the flow of grout to fill dead corners and corners.

[0046] like Figure 2 , Figure 4 and Figure 5As shown, the transmission structure includes a first bevel gear 14, a second bevel gear 15, a rotating shaft 16, a drive ring 17, a connecting rod 18, and a reciprocating drive assembly. A stabilizing block 19 is fixedly installed inside the rigid grouting pipe 5. The main shaft 10 passes through the rigid grouting pipe 5 and the stabilizing block 19. The first bevel gear 14 is rotatably installed inside the stabilizing block 19 and is fitted onto the main shaft 10. The second bevel gear 15 is rotatably installed inside the stabilizing block 19 and meshes with the first bevel gear 14. The stabilizing block 19 protects the first bevel gear 14 and the second bevel gear 15, preventing grout from entering and affecting their transmission. One end of the rotating shaft 16 is connected to the second bevel gear 15. An annular notch is provided on the inner wall of the rigid grouting pipe 5. The drive ring 17 is slidably installed on... Inside the annular notch, the grout is blocked by the drive ring 17 and will not enter the annular notch. The two ends of the connecting rod 18 are connected to the outer circumference of the rotating shaft 16 and the inner wall of the drive ring 17, respectively. The reciprocating drive assembly is used to convert the rotation of the drive ring 17 into the reciprocating sliding motion of the striking rod 13 in the striking hole. In actual use, the main shaft 10 drives the first bevel gear 14 to rotate, and then the first bevel gear 14 drives the second bevel gear 15 and the rotating shaft 16 to rotate synchronously. Then the rotating shaft 16 drives the connecting rod 18 and the drive ring 17 to rotate synchronously. Then the reciprocating drive assembly drives the striking rod 13 to perform reciprocating striking motion, so that the hole wall of the crack drill hole is subjected to continuous striking vibration during the entire grouting process, which facilitates the injection of grout and ensures the grouting effect.

[0047] like Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figure 9 and Figure 10As shown, the reciprocating drive assembly includes a lifting block 20, a second sliding shaft 21, and a third sliding shaft 22. A lifting groove is provided inside the rigid grouting pipe 5 to slide and engage with the lifting block 20. The second sliding shaft 21 is connected to the side of the lifting block 20 near the drive ring 17. An annular wave groove 23 is provided on the outer periphery of the drive ring 17. The second sliding shaft 21 is slidably disposed within the annular wave groove 23. The third sliding shaft 22 passes through the striking rod 13. A movable groove 24 is provided on the side of the lifting block 20 away from the drive ring 17 to slide and engage with the striking rod 13. Inclined grooves 25 are provided on the inner walls of both sides of the movable groove 24. The two ends of the third sliding shaft 22 are respectively located on two inclined grooves. The sliding ring 17 rotates while the second sliding shaft 21 slides in the annular wave groove 23, causing the second sliding shaft 21 and the lifting block 20 to move up and down synchronously. When the lifting block 20 moves up and down in the lifting groove, the third sliding shaft 22 will slide in the inclined groove 25. Since the striking rod 13 can only move laterally back and forth, the distance from each position of the inclined groove 25 to the outer periphery of the rigid grouting pipe 5 is different, thus driving the third sliding shaft 22 to move laterally back and forth. Then, the third sliding shaft 22 drives the striking rod 13 to move laterally back and forth, realizing continuous striking operation and ensuring the effect of striking vibration.

[0048] The method of using the grouting and sealing device for cracks in water conservancy project dams includes the following steps: S1, crack pretreatment: survey the cracks in the dam to be repaired, determine the drilling location and drilling angle according to the crack direction, depth and width, drill grouting holes along the crack extension direction, clean the floating dust, gravel and debris inside the holes to ensure that the inside of the holes is clean and unobstructed.

[0049] S2. Device positioning and installation: Insert the rigid grouting pipe 5 into the grouting borehole, and fix the vibrating seat 6 to the surface of the dam body around the grouting borehole with bolts. Combined with the borehole inclination angle, adjust the angle by deflecting the hemispherical block 7 in the hemispherical groove of the vibrating seat 6 so that the rigid grouting pipe 5 matches the borehole angle, thus completing the device positioning and fixing.

[0050] S3. Grout preparation and filling: According to the requirements of seepage prevention and reinforcement of dam cracks, prepare the appropriate grout and pour the prepared grout evenly into the grout tank 3. Check the connection and sealing of the grouting hose 4 and rigid grouting pipe 5 to avoid grout leakage during the grouting process.

[0051] S4. Vibration and Impact Pretreatment: Start the vibration motor 9, which drives the drive disc 11 to rotate through the main shaft 10. Utilize the cooperation between the annular drive groove 12 and the first sliding shaft to drive the vibration impact rod 8 to slide back and forth and continuously impact the vibration seat 6, causing the dam body to generate low-frequency vibration. At the same time, the main shaft 10 drives the drive ring 17 to rotate through the first bevel gear 14 and the second bevel gear 15. In conjunction with the linkage of the annular wave groove 23, the lifting block 20 and the inclined slide groove 25, multiple sets of impact rods 13 are driven to reciprocate and extend, continuously impacting and vibrating the inner wall of the borehole, clearing the fine cracks inside the fissures and expelling the trapped air inside the fissures.

[0052] S5. Synchronous grouting and vibration sealing: Start the grouting machine 1 and inject the grout in the grout tank 3 into the crack of the dam under high pressure through the grouting hose 4 and the rigid grouting pipe 5. Keep the vibration motor 9 working continuously throughout the grouting process. The overall vibration of the dam body and the local knocking vibration of the inner wall of the borehole are combined to make the grout fully penetrate into the narrow cracks, tortuous cracks and deep dead corners, and fill all the cavities inside the crack.

[0053] S6. Final Curing: After the grouting operation is completed, turn off the grouting machine 1 and the vibrating motor 9 in sequence, and let the equipment stop vibrating. After the grout at the borehole and crack ends has initially set, remove the vibrating seat 6 and the rigid grouting pipe 5, seal and smooth the grouting ends, and cure the grouting area of ​​the dam crack according to the process requirements until the grout has completely solidified and the crack sealing operation is completed.

[0054] In steps S4 and S5, the vibratory motor 9 maintains a constant speed, the impact frequency of the vibratory impact rod 8 is 20-50 times / second, the reciprocating impact frequency of the striking rod 13 is synchronized with the impact frequency of the vibratory impact rod 8, and the grouting pressure is controlled at 0.3-0.8 MPa.

[0055] In step S6, the initial setting time of the grout shall not be less than 30 minutes, and the curing time shall not be less than 72 hours. During the curing process, the grouting area shall be kept moist without water accumulation and without external disturbance.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A grouting and sealing device for cracks in dams used in water conservancy projects, characterized in that, Includes a grouting machine (1), on which a grout tank (3) is installed, and on which a grouting hose (4) communicating with the grout tank (3) is installed, and at one end of the grouting hose (4) away from the grout tank (3) is a rigid grouting pipe (5). The rigid grouting pipe (5) is equipped with a dam vibration mechanism, which is used to vibrate the dam on both sides of the crack. The rigid grouting pipe (5) is equipped with a striking mechanism, which is used to strike the inner wall of the crack borehole and cause the inner wall of the dam crack to vibrate.

2. The grouting and sealing device for cracks in a water conservancy project dam according to claim 1, characterized in that, The dam vibration mechanism includes a vibration seat (6), an angle adjustment structure, and a vibration structure; the vibration seat (6) is installed on the dam by bolts; The angle adjustment structure is used to adjust the tilt angle between the rigid grouting pipe (5) and the vibrating seat (6); The vibration structure is used to impact the vibration seat (6) and cause the vibration seat (6) to vibrate, and then the vibration seat (6) transmits the vibration to the dam.

3. The grouting and sealing device for cracks in a water conservancy project dam according to claim 2, characterized in that, The angle adjustment structure includes a deflection hemispherical block (7); a hemispherical groove is provided in the vibrating seat (6), the deflection hemispherical block (7) is movably installed in the hemispherical groove, and the rigid grouting pipe (5) passes through the deflection hemispherical block (7).

4. A grouting and sealing device for cracks in a water conservancy project dam according to claim 3, characterized in that, The vibration structure includes a vibration impact rod (8) and a drive assembly; the deflecting hemisphere block (7) is provided with a vibration hole that slides with the vibration impact rod (8); The drive assembly is used to drive the vibration impact rod (8) to slide back and forth in the vibration hole. During the back and forth sliding process of the vibration impact rod (8), the end of the vibration impact rod (8) will continuously impact the vibration seat (6).

5. A grouting and sealing device for cracks in a hydraulic engineering dam according to claim 4, characterized in that, The drive assembly includes a vibration motor (9), a main shaft (10), and a drive disk (11). The vibration motor (9) is installed inside the deflection hemisphere (7), the main shaft (10) is installed on the output shaft of the vibration motor (9), the drive disk (11) is fitted on the main shaft (10), the drive disk (11) is rotatably installed inside the deflection hemisphere (7), an annular drive groove (12) is provided on one side of the drive disk (11), and a first sliding shaft is fixedly connected to one side of the vibration impact rod (8), the first sliding shaft slides in the annular drive groove (12).

6. A grouting and sealing device for cracks in a water conservancy project dam according to claim 5, characterized in that, The striking mechanism includes a striking rod (13) and a transmission structure; the outer periphery of the rigid grouting pipe (5) is provided with a plurality of striking holes that slide with the striking rod (13), and the striking rod (13) is slidably disposed in the striking holes; The transmission structure is used to convert the rotation of the main shaft (10) into the reciprocating sliding motion of the striking rod (13) in the striking hole.

7. A grouting and sealing device for cracks in a water conservancy project dam according to claim 6, characterized in that, The transmission structure includes a first bevel gear (14), a second bevel gear (15), a rotating shaft (16), a drive ring (17), a connecting rod (18), and a reciprocating drive assembly; a stabilizing block (19) is fixedly installed inside the rigid grouting pipe (5), and the main shaft (10) passes through the rigid grouting pipe (5) and the stabilizing block (19). The first bevel gear (14) is rotatably installed inside the stabilizing block (19), and the first bevel gear (14) is fitted onto the main shaft (10). The second bevel gear (15) is rotatably installed in the stabilizing block (19). The second bevel gear (15) meshes with the first bevel gear (14). One end of the rotating shaft (16) is connected to the second bevel gear (15). The inner wall of the rigid grouting pipe (5) is provided with an annular notch. The driving ring (17) is slidably installed in the annular notch. The two ends of the connecting rod (18) are respectively connected to the outer periphery of the rotating shaft (16) and the inner ring wall of the driving ring (17). The reciprocating drive assembly is used to convert the rotational motion of the drive ring (17) into the reciprocating sliding motion of the striking rod (13) in the striking hole.

8. A grouting and sealing device for cracks in a water conservancy project dam according to claim 7, characterized in that, The reciprocating drive assembly includes a lifting block (20), a second sliding shaft (21), and a third sliding shaft (22). The rigid grouting pipe (5) has a lifting groove that slides with the lifting block (20). The second sliding shaft (21) is connected to the side of the lifting block (20) near the drive ring (17). The outer periphery of the drive ring (17) has an annular wave groove (23). The second sliding shaft (21) slides in the annular wave groove (23). The third sliding shaft (22) passes through the striking rod (13). The side of the lifting block (20) away from the drive ring (17) has a movable groove (24) that slides with the striking rod (13). The inner walls of both sides of the movable groove (24) have inclined grooves (25). The two ends of the third sliding shaft (22) slide in the two inclined grooves (25) respectively.

9. A method for using a grouting and sealing device for cracks in a water conservancy project dam, comprising the grouting and sealing device for cracks in a water conservancy project dam as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Crack pretreatment: Survey the cracks in the dam to be repaired, determine the drilling location and angle according to the direction, depth and width of the crack, drill grouting holes along the direction of crack extension, and clean the inside of the holes of floating dust, gravel and debris to ensure that the inside of the holes is clean and unobstructed. S2. Device positioning and installation: Insert the rigid grouting pipe (5) into the grouting borehole, fix the vibrating seat (6) to the surface of the dam body around the grouting borehole with bolts, and adjust the angle by deflecting the hemispherical block (7) in the hemispherical groove of the vibrating seat (6) in combination with the borehole inclination angle, so that the rigid grouting pipe (5) matches the borehole angle and the device positioning and fixing is completed. S3. Grout preparation and filling: According to the requirements of seepage prevention and reinforcement of dam cracks, prepare the appropriate grout and pour the prepared grout evenly into the grout bucket (3). Check the connection and sealing of the grouting hose (4) and rigid grouting pipe (5) to avoid grout leakage during the grouting process. S4. Vibration and impact pretreatment: Start the vibration motor (9), drive the drive disk (11) to rotate through the main shaft (10), and drive the vibration impact rod (8) to slide back and forth and continuously impact the vibration seat (6) by using the cooperation of the annular drive groove (12) and the first sliding shaft, so that the dam body generates low-frequency vibration; at the same time, the main shaft (10) drives the drive ring (17) to rotate through the transmission of the first bevel gear (14) and the second bevel gear (15), and in conjunction with the linkage of the annular wave groove (23), the lifting block (20) and the inclined slide groove (25), drive multiple sets of impact rods (13) to reciprocate and extend, continuously impact the inner wall of the borehole, clear the fine cracks inside the crack and discharge the air trapped in the crack; S5. Synchronous grouting and vibration sealing: Start the grouting machine (1) and inject the grout in the grout bucket (3) into the crack of the dam under high pressure through the grouting hose (4) and the rigid grouting pipe (5). Keep the vibration motor (9) working continuously throughout the grouting process. By combining the overall vibration of the dam body with the local knocking vibration of the borehole wall, the grout will fully penetrate into the narrow crack, tortuous crack and deep dead corner position, filling all the cavities inside the crack. S6. Final maintenance: After the grouting operation is completed, turn off the grouting machine (1) and the vibration motor (9) in sequence, and let the equipment stop vibrating. After the grout at the borehole and crack port has initially solidified, remove the vibration seat (6) and the hard grouting pipe (5), seal and smooth the grouting port, and maintain the grouting area of ​​the dam crack according to the process requirements until the grout is completely solidified and the crack sealing operation is completed.

10. The method of using the grouting and sealing device for cracks in a water conservancy project dam according to claim 9, characterized in that, In steps S4 and S5, the vibratory motor (9) maintains a constant speed, the impact frequency of the vibratory impact rod (8) is 20-50 times / second, the reciprocating impact frequency of the striking rod (13) is synchronized with the impact frequency of the vibratory impact rod (8), and the grouting pressure is controlled at 0.3-0.8MPa. In step S6, the initial setting time of the grout shall not be less than 30 minutes, and the curing time shall not be less than 72 hours. During the curing process, the grouting area shall be kept moist without water accumulation and without external disturbance.

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