Testing method for sealing leakage from uneven dam surface under high water pressure by grouting

Abstract

The present invention provides a plugging grouting test method for leakage on an uneven dam surface under high water pressure, comprising the following steps: S1: providing a pressure water tank, arranging a piston assembly, a grouting hole and a water injection hole on the pressure water tank, and opening a first through hole on the lower surface of the pressure water tank; S2: installing an irregular concrete slab in the pressure water tank, pre-embedding a steel pipe in the irregular concrete slab, and passing the steel pipe through the first through hole; S3: installing a plugging plate on the irregular concrete slab, opening a second through hole on the plugging plate, and connecting the second through hole and the grouting hole through a grouting pipe; S4: loading through the piston assembly, and timely pressurizing water into the pressure water tank through the water injection hole to maintain a stable pressure state of high water pressure in the pressure water tank, and observing the leakage of the plugging plate; after the pressure water tank is filled with water and the pressure is stabilized, grouting is performed through the grouting hole, the grouting repair material is connected to the steel pipe through the grouting pipe and transported to the outside, and the concrete transportation situation is observed.

Description

Technical Field

[0001] The invention relates to the technical field of grouting testing, and in particular to a grouting testing method for plugging leakage on an uneven dam surface under high water pressure. Background Art

[0002] Currently, grouting technology, through continuous improvement and development, has been widely applied in foundation reinforcement, water-stop curtains, and anti-seepage and leak plugging. Grouting is a complex process, and the complexity of the strata results in a significant gap between slurry diffusion theory and actual engineering applications. Grouting parameters often require experimental determination. Therefore, laboratory testing has become an important means of studying slurry diffusion patterns.

[0003] Leakage is a common occurrence on tall dams, often leading to multiple leak channels, significantly impacting dam safety. Existing experimental setups typically use conventional, fully sealed pressure water tanks. However, due to their lack of openings, conventional pressure water tanks cannot create a negative pressure differential between the inside and outside. This makes it impossible to simulate the effect of water pressure on sealing plates in deeper dams, making it impossible to observe the sealing and leakage conditions of the plates. Furthermore, when conducting grouting experiments on leak channels, existing experimental setups cannot simulate the high water pressure required to inject grout into the leak channels. Summary of the Invention

[0004] The present invention provides a plugging grouting test method for leakage on uneven dam surface under high water pressure, so as to solve at least one of the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a plugging grouting test method for leakage on uneven dam surface under high water pressure, comprising the following steps: S1: providing a pressure water tank, and arranging a piston assembly, a grouting hole and a water injection hole on the pressure water tank, and opening a first through hole on the lower surface of the pressure water tank; S2: installing an irregular concrete slab in the pressure water tank, pre-embedding a steel pipe in the irregular concrete slab, and passing the steel pipe through the first through hole; S3: installing a plugging plate on the irregular concrete slab, and opening a second through hole on the plugging plate, connecting the second through hole and the grouting hole through a grouting pipe; S4: loading through the piston assembly, and timely pressurizing water into the pressure water tank through the water injection hole to maintain a stable pressure state of high water pressure in the pressure water tank, and observing the leakage of the plugging plate; after the pressure water tank is filled with water and the pressure is stabilized, grouting is performed through the grouting hole, and the grouting repair material is connected to the steel pipe through the grouting pipe and transported to the outside world, and the concrete transportation situation is observed.

[0006] Preferably, the pressure water tank is also equipped with a pressure gauge and a water outlet pipe, and the water outlet pipe is equipped with a built-in safety valve.

[0007] Preferably, a piston assembly is also installed on the pressure water tank, and the piston assembly includes an annular steel support, which is detachably installed on the inner wall of the pressure water tank. Several triangular supports are installed on the lower surface of the annular steel support, and the triangular supports are welded and fixed to the inner wall of the pressure water tank. A rubber support block is installed on the annular steel support, and a convex steel cover plate is provided on the rubber support block.

[0008] Preferably, the pressure water tank includes an upper cylinder, a middle cylinder, a lower cylinder and a flange device, the upper cylinder is welded to the middle cylinder, the middle cylinder is welded to the lower cylinder, and the diameters of the upper cylinder and the lower cylinder are larger than the diameter of the middle cylinder.

[0009] Preferably, a flange device is installed at the lower end of the pressure water tank, an opening is opened in the center of the flange device, and a galvanized plug is provided in the sealing hole to achieve the pressure difference between the inside and outside of the pressure water tank and the effect of external grouting.

[0010] Preferably, a steel plate is installed on the lower surface of the inner wall of the pressure water tank, and an irregular concrete plate is installed on the steel plate. A plurality of screws are provided in the irregular concrete plate, and the plurality of screws pass upward through the blocking plate. A first nut is installed on the screw, and the first nut connects the screw to the blocking plate. A plurality of welding hooks are also provided in the irregular concrete plate, and the lower ends of the welding hooks are welded to the steel plate. The irregular concrete plate is set to an irregular shape, and carbon fiber cloth is also installed on the peripheral side of the irregular concrete plate. A rubber skirt is installed on the peripheral side of the blocking plate, and the other end of the rubber skirt is connected to the peripheral side of the irregular concrete plate; a third through hole is opened on the steel plate, and the steel pipe passes through the first through hole, the third through hole and the lower side blocking hole to extend to the outside, and a second nut is provided on the steel pipe, and the second nut is used to connect the steel pipe and the flange device on the lower side.

[0011] Preferably, the interior of the pressure water tank reaches a high water pressure state, the first through hole at the bottom of the pressure water tank is connected to the outside world, which is 1 atmosphere of pressure, and a rubber ring is provided in the sealing plate. The rubber ring acts on the irregular concrete plate, thereby connecting with the outside world. The rubber skirt is tightly adsorbed on the irregular concrete plate under the action of the negative pressure difference between the inside and the outside, thereby achieving the effect of grouting sealing.

[0012] Preferably, in step S4, it also includes a water outlet component, which includes a driving motor, which is fixedly arranged on the flange device on the lower side, and the upper output end of the driving motor is fixedly connected to a threaded rod, which extends upward into the pressure water tank, and the threaded rod is rotatably connected to the extended position of the pressure water tank. A guide rail is also fixedly provided on the left inner wall of the pressure water tank, and a limit block is fixedly provided on the upper end of the guide rail. The upper end of the threaded rod is rotatably connected to the limit block, and a driving block is threadedly connected to the threaded rod. The left side of the driving block is slidably arranged on the guide rail, and a sliding rod is also slidably provided on the guide rail. A floating box is installed on the lower side of the slide rod, and a water suction box is provided on the lower side of the floating box. The water suction box is connected to the floating box, and a water suction hose is installed on the upper side of the floating box, and the water suction hose extends into the water outlet pipe.

[0013] Preferably, a card box is provided in the driving block, and a slide is provided in the card box, which is slidingly connected to the inner wall of the card box, a permanent magnet 1 is provided on the slide, an electromagnet is installed on the left inner wall of the card box, a card rod is fixedly provided at the right end of the slide, the card rod extends out of the card box to the right, and the card rod is slidingly connected to the extended position of the card box, a number of springs are also installed on the right side of the slide, the other ends of the several springs are fixedly installed on the right inner wall of the card box, a bayonet is provided on the left wall of the floating box, and a permanent magnet 2 is installed in the bayonet.

[0014] Preferably, a tee is installed on the water suction hose, a nozzle is connected to the tee, and the other end of the nozzle is connected to the water spray box. A tee is also provided in the water outlet pipe, the tee is installed on the water suction hose, and the tee is connected to the cleaning pipe. The cleaning pipe extends outward from the water outlet pipe, and the cleaning pipe is fixedly connected to the extension position of the water outlet pipe;

[0015] An opening is provided on the right side wall of the water spray box, and a conical filter cartridge is installed in the water spray box. A rotating shaft is fixed to the left end of the conical filter cartridge, and a rotating blade is fixed to the left end of the rotating shaft. The rotating blade is rotatably connected to the left side wall of the water spray box, and auxiliary rods are fixed on both sides of the rotating blade. The auxiliary rods are fixed with scrapers close to each other in sequence, and the scrapers are in contact with the conical filter cartridge, and the upper end of the water suction box is connected to the floating box.

[0016] Compared with the prior art, the present invention provides a grouting test method for plugging leakage on uneven dam surfaces under high water pressure, which has the following beneficial effects:

[0017] The present invention opens holes on the tank body through the device to form a negative pressure difference between the inside and the outside, simulating the high water pressure of a high-head dam and the negative pressure difference of a leakage channel on an uneven dam surface. The negative pressure difference and sealing plates are used to test the sealing performance and grouting performance of the plates; and concrete is transported through the grouting pipe, so that the transportation of concrete under high water pressure can be observed. The equipment is provided with grouting holes, water injection holes, a safety valve and an internal pressure gauge. The four components can realize multiple functions of leakage water replenishment, grouting, pressure measurement and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the process of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the pressure water tank of the present invention;

[0022] Figure 4 This is a schematic structural diagram of an irregular concrete slab according to the present invention;

[0023] Figure 5 A top view of a portion of the structure of the irregular concrete slab of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the water outlet assembly of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified view of point A;

[0026] Figure 8 It is the internal structure diagram of the water spray box of the present invention.

[0027] Figure: 1. Pressure water tank; 2. Upper cylinder; 3. Middle cylinder; 4. Lower cylinder; 5. Grouting hole; 6. Water injection hole; 7. Pressure gauge; 8. Galvanized plug; 9. Flange assembly; 10. Safety valve; 11. Ring steel support; 12. Support block; 13. Convex steel cover plate; 14. Grouting pipe; 15. Triangular support; 16. Irregular concrete slab; 17. Steel pipe; 18. Welded hook; 19. Sealing plate; 20. Carbon fiber cloth; 21. Steel plate; 22. Second nut; 23. Rubber skirt; 24. Screw; 25. Water outlet pipe ; 26. Guide rail; 27. Drive motor; 28. Cleaning pipe; 29. ​​Tee-joint (two); 30. Suction hose; 31. Limit block; 32. Electromagnet; 33. Drive block; 34. Clamping rod; 35. Threaded rod; 36. Slide plate; 37. Spring; 38. Bayonet; 39. Conical filter cartridge; 40. Rotating shaft; 41. Rotating blade; 42. Auxiliary rod; 43. Water suction box; 44. Scraper; 45. Permanent magnet (two); 46. Floating box; 47. Sliding rod; 48. Nozzle; 49. Water spray box; 50. Tee-joint (one); 51. Snap-in box. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Example 1

[0031] The embodiment of the present invention provides a method for testing leakage plugging grouting on uneven dam surface under high water pressure, such as Figure 1 、 3 -4, comprising the following steps, S1: providing a pressure water tank 1, and arranging a piston assembly, a grouting hole 5 and a water injection hole 6 on the pressure water tank 1, and opening a first through hole on the lower surface of the pressure water tank 1; S2: installing an irregular concrete slab 16 in the pressure water tank 1, pre-embedding a steel pipe 17 in the irregular concrete slab 16, and passing the steel pipe 17 through the first through hole; S3: installing a blocking plate 19 on the irregular concrete slab 16, and opening a second through hole on the blocking plate 19, connecting the second through hole and the grouting hole 5 through a grouting pipe 14; S4: loading through the piston assembly, and timely pressurizing water into the pressure water tank 1 through the water injection hole 6 to maintain a stable pressure state of high water pressure in the pressure water tank 1, and observing the leakage of the blocking plate 19; after the pressure water tank 1 is filled with water and the pressure is stabilized, grouting is performed through the grouting hole, and the grouting repair material is connected to the steel pipe 17 through the grouting pipe 14 and transported to the outside, and the concrete transportation situation is observed.

[0032] The working principle and beneficial effects of the above technical solution are as follows: the first step is to provide a pressure water tank 1, and set a piston assembly, a grouting hole 5 and a water injection hole 6 on the pressure water tank 1, and open a first through hole on the lower surface of the pressure water tank 1; the second step is to install an irregular concrete plate 16 in the pressure water tank 1, pre-embed a steel pipe 17 in the irregular concrete plate 16, and pass the steel pipe 17 through the first through hole; the third step is to install a blocking plate 19 on the irregular concrete plate 16, and open a second through hole on the blocking plate 19, and connect the second through hole to the grouting hole 5 through the grouting pipe 14; the fourth step is to load through the piston assembly, and timely inject water into the pressure water tank 1 through the water injection hole 6 to maintain a high water pressure stable state in the pressure water tank 1, and observe the leakage of the blocking plate 19; after the pressure water tank 1 is filled with water and the pressure is stabilized , grouting is carried out through the grouting holes, and the grouting repair material is connected to the steel pipe 17 through the grouting pipe 14 and transported to the outside to observe the concrete transportation situation; the present invention uses this equipment to open a hole (i.e., the first hole) on the pressure water tank 1, and a steel pipe 17 is installed in the first hole. The steel pipe 17 is connected to the outside, and the steel pipe 17, the irregular concrete slab 16 and the sealing plate 19 form a whole (this whole has an atmospheric pressure, and the water pressure is relatively large), which can form a negative pressure difference between the inside and the outside, and thereby simulate the negative pressure difference of the leakage channel of the dam with a deeper water level, simulate the high water pressure of the high head dam, and the negative pressure difference of the leakage channel of the uneven dam surface, and use the negative pressure difference and the sealing plate 19 to test the sealing performance of the plate; and the concrete is transported through the grouting pipe 14, and the transportation situation of the concrete under the high water pressure state can be observed.

[0033] Example 2

[0034] On the basis of the above embodiment 1, Figure 1-4 As shown, the pressure water tank 1 is further installed with a pressure gauge 7 and a water outlet pipe 25 , and the water outlet pipe 25 is built with a safety valve 10 .

[0035] Among them, preferably, a piston assembly is also installed on the pressure water tank 1, and the piston assembly includes an annular steel support 11, which is detachably installed on the inner wall of the pressure water tank 1, and a plurality of triangular supports 15 are installed on the lower surface of the annular steel support 11. The triangular supports 15 are welded and fixed to the inner wall of the pressure water tank 1, and a rubber support block 12 is installed on the annular steel support 11, and a convex steel cover plate 13 is provided on the rubber support block 12.

[0036] Used to limit the lateral deformation of the rubber support block 12 under the load of the convex steel cover plate 13, and prevent water from seeping between the piston and the pressure water tank 1;

[0037] Among them, preferably, the pressure water tank 1 includes an upper cylinder 2, a middle cylinder 3, and a lower cylinder 4, the upper cylinder 2 is welded to the middle cylinder 3, the middle cylinder 3 is welded to the lower cylinder 4, and the diameters of the upper cylinder 2 and the lower cylinder 4 are larger than the diameter of the middle cylinder 3.

[0038] Among them, preferably, a flange device 9 is installed at the lower end of the pressure water tank 1, an opening is opened in the center of the flange device 9, and a galvanized plug 8 is provided in the sealing hole to achieve the pressure difference between the inside and outside of the pressure water tank 1 and the effect of external grouting.

[0039] In addition, the pressure water tank 1 can also be expanded into a completely sealed water tank, that is, flange devices 9 are installed at the upper and lower ends of the pressure water tank 1, and the upper flange and lower flange devices are provided with sealing holes, and galvanized plugs 8 are provided in the sealing holes. The pressurization method is changed from upper piston loading to water injection pressurization, thereby achieving a high water pressure effect in the water tank.

[0040] Among them, preferably, a steel plate 21 is installed on the lower surface of the inner wall of the pressure water tank 1, and an irregular concrete plate 16 is installed on the steel plate 21. A plurality of screws 24 are provided in the irregular concrete plate 16, and the plurality of screws 24 pass upward through the blocking plate 19. A first nut is installed on the screw 24, and the first nut connects the screw 24 to the blocking plate 19. A plurality of welding hooks 18 are also provided in the irregular concrete plate 16, and the lower end of the welding hook 18 is welded to the steel plate 21. The irregular concrete plate 16 is set to an irregular shape, and a carbon fiber cloth 20 is also installed around the irregular concrete plate 16. A rubber skirt 23 is installed around the blocking plate 19, and the other end of the rubber skirt 23 is connected to the side of the irregular concrete plate 16; a third through hole is opened on the steel plate 21, and the steel pipe 17 extends to the outside through the first through hole, the third through hole and the lower side blocking hole, and a second nut 22 is provided on the steel pipe 17. The second nut 22 is used to connect the steel pipe 17 and the flange device 9 on the lower side.

[0041] The working principle and beneficial effects of the above technical solution are as follows: during testing, the pressure gauge 7 monitors the pressure in the pressure water tank 1 in real time, and the safety valve 10 is provided to improve the safety of the pressure water tank 1; jack loading can be achieved on the piston assembly, and the jack applies pressure to the convex steel cover plate 13, which descends, compressing the rubber support block 12. The annular steel support 11 and the triangular support 15 support the convex steel cover plate 13 and the rubber support block 12, thereby increasing the pressure in the pressure water tank 1, thereby simulating pressure conditions at different water depths and improving the practicality of the device;

[0042] The plurality of screws 24 in the irregular concrete slab 16 are passed through the blocking plate 19, and the blocking plate 19 and the irregular concrete slab 16 are connected by the first nut. Then, the welding hook 18 is welded to the steel plate 21, and then the steel plate 21 is placed on the lower surface of the inner wall of the pressure water tank 1. The steel pipe 17 is extended to the outside through the first through hole and the third through hole, and the steel pipe 17 is locked to the flange device 9 on the lower side by the second nut 22 on the steel pipe 17. Then, the concrete is transported through the grouting pipe 14, and the concrete is transported to the outside through the steel pipe 17. The transportation status of the concrete can be observed.

[0043] By setting an irregular concrete slab 16, the surface of which is uneven, it can simulate an uneven dam surface, and utilize the negative pressure difference and the internally installed sealing plate 19 and negative pressure skirt 23 to achieve the purpose of testing the sealing performance of the sealing plate 19; by setting the grouting hole 5, the water injection hole 6, the safety valve 10 and the pressure gauge 7, the four components can realize the multiple functions of leakage water replenishment, grouting, pressure measurement and safety; through a round steel pipe 17 and a second nut 22 at the bottom, the purpose of connecting the water tank and the irregular concrete slab 16 is achieved, the replacement is convenient, and the equipment can be reused; by setting the flange device 9 and configuring the galvanized plug 8 at the opening, the pressure water tank 1 can be expanded into a fully enclosed pressure water tank, and the internal high-pressure water environment can be achieved by pressurizing with a pressure water pump.

[0044] Example 3

[0045] On the basis of the above-mentioned embodiments 1-2, Figure 5-6 As shown, in step S4, it also includes a water outlet component, which includes a driving motor 27. The driving motor 27 is fixedly arranged on the flange device 9 on the lower side. The upper output end of the driving motor 27 is fixedly connected to the threaded rod 35, which extends upward into the pressure water tank 1, and the threaded rod 35 is rotatably connected to the extended position of the pressure water tank 1. A guide rail 26 is also fixedly provided on the left inner wall of the pressure water tank 1, and a limit block 31 is fixedly provided on the upper end of the guide rail 26. The upper end of the threaded rod 35 is rotatably connected to the limit block 31, and a driving block 33 is threadedly connected to the threaded rod 35. The left side of the driving block 33 is slidably arranged on the guide rail 26, and a sliding rod 47 is also slidably provided on the guide rail 26. A floating box 46 is installed on the lower side of the sliding rod 47, and a water suction box 43 is provided on the lower side of the floating box 46. The water suction box 43 is connected to the floating box 46, and a water suction hose 30 is installed on the upper side of the floating box 46, and the water suction hose 30 extends into the water outlet pipe 25.

[0046] Among them, preferably, a card box 51 is provided in the driving block 33, and a slide 36 is provided in the card box 51. The slide 36 is slidingly connected to the inner wall of the card box 51, and a permanent magnet 1 is provided on the slide 36. An electromagnet 32 ​​is installed on the left inner wall of the card box 51. A card rod 34 is fixed to the right end of the slide 36, and the card rod 34 extends to the right out of the card box 51, and the card rod 34 is slidingly connected to the extended position of the card box 51. A number of springs 37 are also installed on the right side of the slide 36, and the other ends of the several springs 37 are fixedly installed on the right inner wall of the card box 51. A bayonet 38 is provided on the left wall of the floating box 46, and a permanent magnet 2 45 is installed in the bayonet 38.

[0047] Among them, preferably, a tee 50 is installed on the water suction hose 30, and a nozzle 48 is connected to the tee 50. The other end of the nozzle 48 is connected to the water spray box 49. A tee 29 is also provided in the water outlet pipe 25. The tee 29 is installed on the water suction hose 30 and is connected to the cleaning pipe 28. The cleaning pipe 28 extends outward from the water outlet pipe 25, and the cleaning pipe 28 is fixedly connected to the extension position of the water outlet pipe 25;

[0048] An opening is provided on the right side wall of the water spray box 49, and a conical filter cartridge 39 is installed in the water spray box 49. A rotating shaft 40 is fixed to the left end of the conical filter cartridge 39, and a rotating blade 41 is fixed to the left end of the rotating shaft 40. The rotating blade 41 is rotatably connected to the left side wall of the water spray box 49, and auxiliary rods 42 are fixedly connected on both sides of the rotating blade 41. The auxiliary rods 42 are fixed with scrapers 44 close to each other in sequence. The scrapers 44 are in contact with the conical filter cartridge 39, and the upper end of the water suction box 43 is connected to the floating box 46.

[0049] The working principle and beneficial effects of the above technical solution are as follows: after the detection is completed, an external water pump is connected to the water outlet pipe 25. In the initial state, the electromagnet 32 ​​is started, the electromagnet 32 ​​attracts the permanent magnet 1 on the slide 36, the slide 36 contacts the electromagnet 32, the driving block 33 contacts the lower surface of the inner wall of the pressure water tank 1, and under the action of buoyancy, the floating box 46 makes the slide 47 contact with the limit block 31. At this time, the external water pump on 25 is started, and the water suction box 43 sucks the water in the pressure water tank 1. The water passes through the floating box 46. The water box 46 and the suction hose 30 enter the water outlet pipe 25 and are then discharged from the water outlet pipe 25. Even if a small amount of concrete leaks through the pipe connection or there are some impurities during the experiment, the water suction box 43 can suck it out. As the water level in the pressure water tank 1 decreases, the floating box 46 will gradually descend (the floating box 46 will always be in contact with the water surface, while the water suction box 43 will always be in the water). After the water and impurities in the pressure water tank 1 are sucked out, the floating box 46 will descend to the lowest position.

[0050] At this time, the electromagnet 32 ​​is powered off, the slide 36 is released under the action of the spring 37, the card rod 34 is inserted into the bayonet 38, and the permanent magnet 2 45 adsorbs the card rod 34, so that the drive block 33 and the floating box 46 are connected as a whole, the tee 1 50 and the tee 2 29 are rotated, and water is introduced through the cleaning pipe 28 (at this time, water can also be introduced through the water injection hole 6), and the water enters the nozzle 48 through the suction hose 30, and then the water enters the water spray box 49. When the water enters the water spray box 49, the water drives the rotating blade 41 to rotate, the rotating blade 41 drives the water suction box 43 to rotate, and the water suction box 43 drives the scraper 44 to rotate, scraping the conical filter cartridge 39 to prevent the conical filter cartridge 39 from being blocked. The plug improves the smoothness of water discharge. At this time, the drive motor 27 is started, and the drive motor 27 drives the threaded rod 35 to rotate, and the threaded rod 35 drives the drive block 33 to move up and down, and the drive block 33 drives the floating box 46 to move up and down. Water is sprayed into the pressure water tank 1 over a large range, making the cleaning of the pressure water tank 1 more effective. At the same time, as the water gradually increases, if a lot of concrete leaks from the pressure water tank 1, the concrete can also be diluted, so that the leaked concrete can be more easily sucked out from the water suction box 43, effectively improving the practicality and functionality of the device; and there is no need to set up a separate cleaning pipeline, and reverse cleaning can be achieved using the water suction hose 30, thereby improving the cleaning efficiency of the inner wall of the pressure water tank 1.

[0051] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. If such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A grouting test method for plugging leakage on uneven dam surface under high water pressure, characterized in that: The method comprises the following steps: S1: providing a pressure water tank (1), arranging a piston assembly, a grouting hole (5) and a water injection hole (6) on the pressure water tank (1), and opening a first through hole on the lower surface of the pressure water tank (1); S2: installing an irregular concrete slab (16) in the pressure water tank (1), embedding a steel pipe (17) in the irregular concrete slab (16), and passing the steel pipe (17) through the first through hole; S3: installing a blocking plate (19) on the irregular concrete slab (16), and inserting a blocking plate (19) in the blocking plate (1 9) a second through hole is opened on the upper surface, and the second through hole is connected to the grouting hole (5) through the grouting pipe (14); S4: loading through the piston assembly, and timely injecting water into the pressure water tank (1) through the water injection hole (6), maintaining the high water pressure in the pressure water tank (1) at a stable pressure state, and observing the leakage of the sealing plate (19); after the pressure water tank (1) is filled with water and the pressure is stabilized, grouting is performed through the grouting hole, and the grouting repair material is connected to the steel pipe (17) through the grouting pipe (14) and transported to the outside, and the concrete transportation condition is observed; The pressure water tank (1) is also provided with a piston assembly, which includes an annular steel support (11), which is detachably mounted on the inner wall of the pressure water tank (1), and a plurality of triangular supports (15) are mounted on the lower surface of the annular steel support (11), which are welded and fixed to the inner wall of the pressure water tank (1), and a rubber support block (12) is mounted on the annular steel support (11), and a convex steel cover plate (13) is provided on the rubber support block (12); The jack applies pressure to the convex steel cover plate (13), and the convex steel cover plate (13) descends, causing the rubber support block (12) to be compressed. The annular steel support (11) and the triangular support (15) support the convex steel cover plate (13) and the rubber support block (12), thereby increasing the pressure in the pressure water tank (1); A flange device (9) is installed at the lower end of the pressure water tank (1), a sealing hole is opened in the center of the flange device (9), and a galvanized plug (8) is arranged in the sealing hole to achieve the pressure difference between the inside and outside of the pressure water tank (1) and the effect of external grouting; A steel plate (21) is installed on the lower surface of the inner wall of the pressure water tank (1), and an irregular concrete plate (16) is installed on the steel plate (21). A plurality of screws (24) are provided in the irregular concrete plate (16), and the plurality of screws (24) pass upward through the blocking plate (19). A first nut is installed on the screw (24), and the first nut connects the screw (24) to the blocking plate (19). A plurality of welding hooks (18) are also provided in the irregular concrete plate (16), and the lower ends of the welding hooks (18) are welded to the steel plate (21), and the irregular concrete plate (16) ) is also installed with a carbon fiber cloth (20) on the circumference of the sealing plate (19), and a rubber skirt (23) is installed on the circumference of the sealing plate (19), and the other end of the rubber skirt (23) is connected to the circumference of the irregular concrete slab (16); a third through hole is opened on the steel plate (21), and the steel pipe (17) extends to the outside through the first through hole, the third through hole and the lower side sealing hole, and a second nut (22) is provided on the steel pipe (17), and the second nut (22) is used to connect the steel pipe (17) and the flange device (9) on the lower side; the irregular concrete slab (16) refers to a concrete slab with an uneven top surface; The pressure water tank (1) reaches a high water pressure state, and the first through hole at the bottom of the pressure water tank (1) is connected to the outside world at 1 atmosphere. A rubber ring is provided in the sealing plate (19), and the rubber ring acts on the irregular concrete plate (16), thereby connecting with the outside world. The rubber skirt (23) is tightly adsorbed on the irregular concrete plate (16) under the action of the negative pressure difference between the inside and the outside, thereby achieving the effect of grouting sealing.

2. The grouting test method for plugging leakage on uneven dam surface under high water pressure according to claim 1, characterized in that: The pressure water tank (1) comprises an upper cylinder (2), a middle cylinder (3), and a lower cylinder (4); the upper cylinder (2) and the middle cylinder (3) are welded, and the middle cylinder (3) and the lower cylinder (4) are welded, and the diameters of the upper cylinder (2) and the lower cylinder (4) are larger than the diameter of the middle cylinder (3).

3. The grouting test method for plugging leakage on uneven dam surface under high water pressure according to claim 1, characterized in that: In step S4, a water outlet assembly is also included, which includes a drive motor (27), the drive motor (27) is fixedly arranged on the flange device (9) on the lower side, the upper output end of the drive motor (27) is fixedly connected to the threaded rod (35), the threaded rod (35) extends upward into the pressure water tank (1), and the threaded rod (35) is rotatably connected to the extended position of the pressure water tank (1), and a guide rail (26) is fixedly provided on the left inner wall of the pressure water tank (1), and a limit block (31) is fixedly provided on the upper end of the guide rail (26). The threaded rod (35) ) is rotatably connected to the limit block (31), and a driving block (33) is threadedly connected to the threaded rod (35). The left side of the driving block (33) is slidably set on the guide rail (26). A slide rod (47) is also slidably provided on the guide rail (26). A floating box (46) is installed on the lower side of the slide rod (47). A water suction box (43) is provided on the lower side of the floating box (46). The water suction box (43) is connected to the floating box (46). A water suction hose (30) is installed on the upper side of the floating box (46). The water suction hose (30) extends into the outlet pipe (25).

4. The grouting test method for plugging leakage on uneven dam surface under high water pressure according to claim 3, characterized in that: A card box (51) is provided in the driving block (33), a slide plate (36) is provided in the card box (51), the slide plate (36) is slidably connected to the inner wall of the card box (51), a permanent magnet 1 is provided on the slide plate (36), an electromagnet (32) is installed on the left inner wall of the card box (51), a card rod (34) is fixedly provided on the right end of the slide plate (36), the card rod (34) extends to the right out of the card box (51), and the card rod (34) is slidably connected to the extended position of the card box (51), a plurality of springs (37) are also installed on the right side of the slide plate (36), the other ends of the plurality of springs (37) are fixedly installed on the right inner wall of the card box (51), a bayonet (38) is provided on the left wall of the floating box (46), and a permanent magnet 2 (45) is installed in the bayonet (38).

5. The grouting test method for plugging leakage on uneven dam surface under high water pressure according to claim 4, characterized in that: A tee (50) is installed on the water extraction hose (30), and a nozzle (48) is connected to the tee (50). The other end of the nozzle (48) is connected to the water spray box (49). A tee (29) is also provided in the water outlet pipe (25). The tee (29) is installed on the water extraction hose (30). The tee (29) is connected to the cleaning pipe (28). The cleaning pipe (28) extends outward from the water outlet pipe (25), and the cleaning pipe (28) is fixedly connected to the extended position of the water outlet pipe (25); An opening is provided on the right side wall of the water spray box (49), and a conical filter cartridge (39) is installed in the water spray box (49). A rotating shaft (40) is fixedly provided at the left end of the conical filter cartridge (39), and a rotating blade (41) is fixedly provided at the left end of the rotating shaft (40). The rotating blade (41) is rotatably connected to the left side wall of the water spray box (49), and auxiliary rods (42) are fixedly connected on both sides of the rotating blade (41). The auxiliary rods (42) are fixedly provided with scrapers (44) in sequence close to each other, and the scrapers (44) are in contact with the conical filter cartridge (39), and the upper end of the water suction box (43) is connected to the floating box (46).

6. The grouting test method for plugging leakage on uneven dam surface under high water pressure according to claim 1, characterized in that: The pressure water tank (1) is also provided with a pressure gauge (7) and a water outlet pipe (25), and the water outlet pipe (25) is provided with a safety valve (10) built therein.

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