Highly impermeable dam sand base grouting equipment

Abstract

This invention provides a high-seepage-proof grouting device for sand-based dams, belonging to the field of grouting technology. It includes a grouting pipe and a dual-liquid grouting machine. The outlet of the dual-liquid grouting machine is connected to the grouting pipe via a pipeline. The grouting pipe has multiple grouting holes on its surface. It also includes an auxiliary grouting mechanism, which comprises multiple strip-shaped holes on the surface of the grouting pipe, aligned vertically with the grouting holes. By setting up the auxiliary grouting mechanism, when the grouting pressure increases, the limiting component is released, and the sealing plate rotates outward. After the sealing plate rotates outward, the mixed grout in the grouting pipe will be discharged from the strip-shaped holes. The sealing plate can then guide the mixed grout to be injected obliquely upwards, directing the mixed grout to areas with less grouting, without forcibly increasing the grouting pressure. This reduces the risk of ground fracturing and grout leakage along the pipe wall, increases the grout diffusion range, improves the uniformity of sand-based grouting, and ensures stable grouting operation.

Description

Technical Field

[0001] This invention relates to the field of grouting technology, and in particular to a highly impermeable grouting device for sand-based dams. Background Technology

[0002] Enzyme-induced calcium carbonate precipitation combined with sodium alginate grouting can achieve seepage prevention and reinforcement of sandy foundation dams. Typically, conventional dual-liquid grouting machines are used in conjunction with grouting perforated pipes to carry out grouting operations. Sodium alginate-urease A solution and urea-calcium chloride B solution are output from two channels of the dual-liquid grouting machine and mixed at the static mixer at the orifice. The mixed reaction grout flows through the entire buried grouting perforated pipe and is injected into the sandy foundation through small holes in the side wall.

[0003] After the mixed grout is sprayed into the sand base through the small hole of the grouting pipe, it is easy to form calcium alginate gel and calcium carbonate precipitation in the sand pores adjacent to the grout outlet. This causes the sand pore channels near the grout outlet to be compressed and narrowed, and the seepage resistance to increase significantly. This results in a sharp increase in grouting pressure and a decrease in grouting flow rate. Therefore, this application provides a high seepage-proof dam sand base grouting equipment to meet the requirements. Summary of the Invention

[0004] This invention provides a highly impermeable dam sand-based grouting device to solve the problems of high grouting pressure and decreased grouting flow rate after a period of grouting.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A highly impermeable dam sand-based grouting device includes a grouting pipe and a dual-liquid grouting machine. The outlet of the dual-liquid grouting machine is connected to the grouting pipe via a pipeline. The grouting pipe has multiple grouting holes on its surface. The device also includes: An auxiliary grouting mechanism includes multiple strip-shaped holes on the surface of a grouting pipe, which are aligned vertically with the grouting holes and located above the corresponding grouting holes. A sealing plate is rotatably connected inside the strip-shaped holes. A limiting component is installed inside the grouting pipe to restrict the rotation of the sealing plate. When the pressure inside the grouting pipe increases, the limiting component releases the restriction, and the sealing plate rotates outward. A hexagonal sleeve is fixedly fitted onto the surface of the grouting pipe near the top. The limiting component includes two side plates symmetrically fixed to the surface of the rotating plate. The side plates are located inside the grouting pipe. An L-shaped limiting post is fixed to the inner wall of the grouting pipe. The L-shaped limiting post consists of a horizontal part and a vertical part. Initially, the side plates are attached to the surface of the vertical part. Multiple connecting ropes are connected between the two side plates located on the same vertical part, and the connecting ropes are attached to the vertical part.

[0006] Preferably, the surface of the grouting pipe is fixed with a protrusion located at the strip hole. A groove is formed on the surface of the protrusion and is connected to the strip hole. A rotating shaft is fixedly connected to the inner wall of the groove. A rotating part is integrally formed at the bottom of the sealing plate and is rotatably connected to the surface of the rotating shaft. The side of the rotating part is slidably connected to the inner wall of the strip hole and the groove. A limit groove is formed on the surface of the protrusion.

[0007] Preferably, the bottom of the protrusion has an arc-shaped portion.

[0008] Preferably, the bottom of the limiting groove is provided with a guide surface, and the side of the guide surface away from the grouting pipe is lower.

[0009] Preferably, the surface of the vertical part is provided with a positioning groove, and the side plate abuts against the inner wall of the positioning groove.

[0010] Preferably, the top of the horizontal section has two symmetrically arranged inclined surfaces, and the connection between the two inclined surfaces is high.

[0011] Preferably, the adjacent connecting ropes are staggered vertically.

[0012] Preferably, the connecting rope is broken in the middle and connected by a V-shaped block, which is attached to the surface of the vertical part.

[0013] Preferably, the top of the V-shaped block has a through hole, which is located in the middle of the V-shaped block.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up an auxiliary grouting mechanism, when the grouting pressure increases, the limiting component is released, and the sealing plate will rotate outward. After the sealing plate rotates outward, the mixed grout in the grouting pipe will be discharged from the strip hole. At this time, the sealing plate can guide the mixed grout to be injected obliquely upward, directing the mixed grout to areas with less grouting, without forcibly increasing the grouting pressure, reducing the risk of formation fracturing and grout leakage along the pipe wall, increasing the grout diffusion range, improving the uniformity of sand-based grouting, and ensuring stable grouting operation. Secondly, the outward rotation of the sealing plate... During the process, the sand base can be opened up to form a cavity. The mixed grout sprayed from the strip hole is injected into the cavity and then permeates outward from the cavity. The cavity can increase the initial permeation area and improve the grouting efficiency. When the problem of difficulty in grouting occurs again after a period of time, the hexagonal sleeve is rotated by wrench. The hexagonal sleeve will rotate the grouting pipe, forcibly changing the grout outlet position of the strip hole, pointing the strip hole toward the part with less grout, reducing the grouting pressure, and can also increase the grout diffusion range and improve the uniformity of sand base grouting.

[0015] By setting a protrusion and a rotating part at the bottom of the sealing plate, the diameter of the rotating part is larger than the width of the sealing plate, allowing the larger diameter shaft to become the fulcrum of rotation, thereby improving the overall structural strength in use. The protrusion provides an installation position for the shaft. Secondly, during the insertion of the grouting pipe into the sand base, the protrusion can form a grouting channel in the sand base, creating a gap around the grout outlet in advance, reducing the grout seepage resistance in the initial grouting stage, and facilitating the penetration and diffusion of the mixed grout into the surrounding sand. Furthermore, during the outward rotation of the sealing plate, the bottom of the limiting groove can limit the rotation of the plate, preventing excessive rotation.

[0016] By setting an arc-shaped part, the contact resistance between the protrusion and the sand base can be reduced during the insertion of the grouting pipe into the sand base. The arc-shaped part can guide the sand and reduce the jacking force required for the grouting pipe to be inserted, thus reducing the load on the construction equipment. It can also reduce the cutting disturbance of the protrusion on the surrounding sand and prevent the sand and soil from collapsing and backfilling, thus protecting the pre-formed grouting channel of the protrusion from being buried and blocked by the sand and soil.

[0017] By setting a guide surface, if there is sand or gravel at the bottom of the limiting groove during the outward rotation of the rotating plate, the guide surface can guide the sand or gravel at the bottom of the limiting groove out, preventing the sand or gravel from affecting the rotation of the rotating plate and ensuring the stable operation of the whole.

[0018] By setting side plates, the rotating plate can act as a guide during its outward rotation, making the rotation of the rotating plate more stable. Secondly, the flow channels formed between adjacent side plates provide space for grout flow, allowing the grout to be stably guided by the rotating plate and improving the stability of grout flow. When the side plates are initially located inside the grouting pipe, as the grout passes through the side plates, the mixed grout will gel, and the side plates can disperse the grout, dividing it into smaller volumes, making it easier for the grout to be discharged from the grouting hole, and further reducing the grouting pressure. During the rotation of the grouting pipe, the side plates can disturb more sand, allowing the grout to better penetrate into the sand and stabilize the grouting pressure.

[0019] By setting a positioning groove, when the rotating plate is located in the strip groove, the side plate is engaged in the positioning groove of the vertical part, and the connecting rope is attached to the surface of the vertical part. At this time, the side plate and the connecting rope can fix the position of the rotating plate, preventing the rotating plate from rotating outward or inward at will. The side plate is engaged in the positioning groove, and the engagement is more stable. When the internal pressure of the grouting pipe is too high, the connecting rope breaks, and the rotating plate can rotate outward. During the process of the grout being discharged from the grouting hole, the horizontal part can also divide the already gelled grout into smaller volumes, making it easier for the grout to be discharged from the grouting hole and further stabilizing the grouting pressure.

[0020] By setting up an inclined plane, the top of the horizontal section forms a pointed tip, which facilitates the segmentation of the slurry and also plays a guiding role, improving the smoothness of slurry flow.

[0021] By setting up V-blocks, the V-blocks are more stable than the direct breakage of the connecting rope. After the V-block breaks, it will be held between the two side plates by the connecting rope. When the grout flows between the two side plates, the broken V-blocks can divide the grout into smaller volumes, which facilitates grouting.

[0022] By setting through holes, the slurry can flow out from there, reducing the impact on the V-block, preventing the connecting rope from breaking prematurely, and improving stability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 This is a cross-sectional view of the slotted hole in the present invention; Figure 4 This is a schematic diagram of the side plate structure of the present invention; Figure 5 This is a schematic diagram of the sealing plate structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure at the V-shaped block of the present invention.

[0025] Figure 7 This is a schematic diagram of the structure at the L-shaped limiting post of the present invention.

[0026] In the diagram: 1. Grouting pipe; 2. Grouting hole; 3. Auxiliary grouting mechanism; 4. Strip hole; 5. Sealing plate; 6. Rotating part; 7. Protrusion; 8. Arc-shaped part; 9. Limiting groove; 10. Guide surface; 11. Rotating shaft; 12. Side plate; 13. L-shaped limiting post; 14. Inclined surface; 15. Positioning groove; 16. Connecting rope; 17. V-block; 18. Through hole; 19. Horizontal part; 20. Vertical part; 21. Hexagonal sleeve.

[0027] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0028] The present invention provides a highly impermeable dam sand-based grouting device with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0029] like Figures 1-7 As shown, an embodiment of the present invention provides a highly impermeable dam sand-based grouting device, including a grouting pipe 1 and a dual-liquid grouting machine (not shown in the figure). The outlet of the dual-liquid grouting machine is connected to the grouting pipe 1 through a pipe. The surface of the grouting pipe 1 is provided with multiple grouting holes 2. The device also includes: The auxiliary grouting mechanism 3 includes multiple strip holes 4 formed on the surface of the grouting pipe 1. The strip holes 4 are aligned vertically with the grouting holes 2 and are located above the corresponding grouting holes 2. A sealing plate 5 is rotatably connected inside the strip holes 4. like Figures 2-5 As shown, a protrusion 7 is fixed on the surface of the grouting pipe 1. The protrusion 7 is located at the slotted hole 4. A groove is formed on the surface of the protrusion 7, which is connected to the slotted hole 4. A rotating shaft 11 is fixedly connected to the inner wall of the groove. A rotating part 6 is integrally formed at the bottom of the sealing plate 5. The rotating part 6 is rotatably connected to the surface of the rotating shaft 11. The side of the rotating part 6 is slidably connected to the slotted hole 4 and the inner wall of the groove. A limit groove 9 is formed on the surface of the protrusion 7. The protrusion 7 is an external integrated bearing structure, which is fixed to the outer wall of the grouting pipe 1 at the position corresponding to the slotted hole 4. On the one hand, the groove provides a fixed installation point for the rotating shaft 11 to realize the rotational assembly of the sealing plate 5; on the other hand, during the process of pressing the grouting pipe 1 into the sand base, the surrounding sand can be pre-compressed. A reserved void channel is formed on the outer side of the grouting area to reduce the subsequent grout penetration resistance and provide basic conditions for uniform grouting. The rotating part 6 is the rotating base of the sealing plate 5 and is sleeved on the surface of the rotating shaft 11. The rotating shaft 11 is used to realize the stable rotation and opening and closing of the sealing plate 5. The rotating part 6 slides and fits against the inner wall of the groove and the strip hole 4, which can ensure that the sealing plate 5 is free from deviation and jamming during the opening and closing process, and improve the stability of the structure. The limiting groove 9 is an angle limiting structure. During the outward rotation of the sealing plate 5, it can resist and limit the maximum rotation range of the sealing plate 5, avoid the sealing plate 5 from overturning and structural failure, ensure that the grout guiding angle is always in the optimal range, stabilize the auxiliary grouting effect, and at the same time improve the deformation resistance and service life of the overall structure. like Figure 2 As shown in this embodiment, the bottom of the protrusion 7 is provided with an arc-shaped part 8. During the process of the grouting pipe 1 being vertically pressed down and pre-embedded into the sand base, the arc-shaped part 8 can play a sliding and guiding role on the surrounding sand and soil, effectively reducing the contact friction resistance between the protrusion 7 and the sand and soil, reducing the downward pressing and pushing force of the equipment, and reducing the operating load of the construction equipment. A limiting component is installed inside the grouting pipe 1. The limiting component is used to restrict the rotation of the sealing plate 5. After the pressure inside the grouting pipe 1 increases, the limiting component is released, and the sealing plate 5 rotates outward. like Figures 3-5 As shown, the limiting assembly includes two side plates 12 symmetrically fixed to the surface of the rotating plate. The side plates 12 are located inside the grouting pipe 1. An L-shaped limiting post 13 is fixed to the inner wall of the grouting pipe 1. The L-shaped limiting post 13 consists of a horizontal part 19 and a vertical part 20. Initially, the side plates 12 are attached to the surface of the vertical part 20. Multiple connecting ropes 16 are connected between the two side plates 12 located on the same vertical part 20. The connecting ropes 16 are attached to the vertical part 20. The side plates 12 are the guiding and limiting structure of the sealing plate 5. They are symmetrically fixed to the inner side of the rotating plate. In the initial state, they are attached to the vertical part 20 of the L-shaped limiting post 13. Together with the connecting ropes 16, they form a rigid limiting system, firmly locking the sealing plate 5. In the low-pressure grouting stage, the sealing plate 5 is prevented from being accidentally opened and the grout from flowing turbulently. The L-shaped limiting column 13 achieves the positioning and limiting of the side plate 12 through the vertical part 20, and the overall stability is improved by the extension structure of the horizontal part 19. Multiple sets of connecting ropes 16 are tightened to fit the vertical part 20, providing pre-tightening force to the side plate 12 and locking the overall limiting structure. When the grout pressure inside the grouting pipe 1 exceeds the standard, the impact force of the grout can break the connecting ropes 16, automatically releasing the limiting constraint and realizing the adaptive opening of the sealing plate 5. At the same time, the gap between the side plates 12 can form a regular grout flow channel, which can divert and sort the mixed grout in the gel state, reduce the grouting resistance caused by the grout viscosity, and stabilize the grouting pressure. like Figure 7 As shown, a positioning groove 15 is provided on the surface of the vertical part 20. The side plate 12 abuts against the inner wall of the positioning groove 15. In the initial working state of the equipment, the end of the side plate 12 is precisely abutted and inserted into the interior of the positioning groove 15. Compared with the flat contact limit, it can limit the offset, shaking and slight rotation of the side plate 12, greatly improve the locking stability of the limit component, effectively prevent the sealing plate 5 from loosening and leakage during low-pressure grouting, and ensure the smooth progress of the conventional grouting process. After the pipeline pressure increases and the connecting rope 16 breaks, the side plate 12 can smoothly get out of the constraint of the positioning groove 15 without affecting the normal opening action of the sealing plate 5, and ensure the sensitivity and accuracy of the equipment pressure response.

[0030] like Figure 7 As shown in this embodiment, two inclined surfaces 14 are symmetrically opened at the top of the horizontal part 19. The connection between the two inclined surfaces 14 is high. When the slurry flows through the L-shaped limiting column 13, the inclined surface 14 can actively divert and cut the viscous, easily gelled two-liquid mixed slurry, break up large slurry clumps, reduce the viscosity and flow resistance of the slurry, and allow the slurry to be discharged more smoothly from the grouting hole 2. This effectively stabilizes the grouting pressure and avoids a sudden increase in pressure accumulation. At the same time, the inclined surface 14 can regulate and guide the flow of the slurry, prevent turbulent accumulation of the slurry, and improve the uniformity and stability of the slurry delivery in the pipe. A hexagonal sleeve 21 is fixedly fitted onto the surface of the grouting pipe 1 near its top. The dual-liquid grouting machine is the power source for the equipment's grouting, continuously delivering the mixed grout through the pipeline to the inside of the grouting pipe 1, providing grout supply for sand-based grouting operations. The grouting pipe 1 is the core grouting substrate, extending into the sand foundation of the dam for pre-embedded installation. The grouting hole 2 is a conventional low-pressure grouting channel. In the initial working state of the equipment, the grout permeates outward through the grouting hole 2. The auxiliary grouting mechanism 3 is a high-pressure grouting and seepage expansion structure. The strip hole 4 is an auxiliary grouting channel, vertically aligned with the grouting hole 2 to achieve coordinated high and low-level grouting. The sealing plate 5 is the opening, closing, sealing, and flow guiding component of the strip hole 4. Under normal conditions, it is stored inside the strip hole 4, sealing the auxiliary grouting channel. The limiting component is used to lock the initial state of the sealing plate 5. The system restricts rotation and opening when not in operation to prevent premature grout leakage. When the sand-based pores are saturated and the grout pressure inside the pipeline rises to a threshold, the limiting component automatically releases its lock, and the sealing plate 5 rotates outward to open, opening the strip hole 4. The outwardly rotating sealing plate 5 can actively pry open the surrounding sand to form a grouting cavity, while changing the grout flow direction and guiding the grout discharged from the strip hole 4 to diffuse obliquely upward, targeting and supplementing weak grouting areas without forcibly increasing the grouting pressure, preventing stratum splitting, and expanding the grout diffusion area. The hexagonal sleeve 21 is an externally rotating force-bearing structure. During use, it can be driven by a wrench to rotate the grouting pipe 1 as a whole, flexibly adjusting the grouting orientation of the strip hole 4 and the sealing plate 5, specifically compensating for blind spots in sand-based grouting, and comprehensively improving the uniformity and impermeability of sand-based grouting.

[0031] like Figure 3 As shown in this embodiment, a guide surface 10 is provided at the bottom of the limiting groove 9. The side of the guide surface 10 away from the grouting pipe 1 is lower. During the equipment pre-embedding and grouting operation, sand and soil debris and fine impurities are easily trapped and accumulated inside the limiting groove 9. When the sealing plate 5 rotates to open and close, the inclined guide surface 10 can guide and dredge the trapped impurities, automatically exporting the sand and gravel and impurities into the limiting groove 9, avoiding impurities from getting stuck in the sealing plate 5 and hindering the rotation of the structure, ensuring that the high-pressure auxiliary grouting mechanism can accurately respond to pressure changes and improve the reliability of equipment operation.

[0032] like Figure 5As shown in this embodiment, the adjacent connecting ropes 16 are staggered vertically. Multiple sets of connecting ropes 16 are arranged in a staggered manner to form a multi-layered graded limiting structure, which evenly distributes the force on the side plate 12 and avoids premature loosening and breakage caused by concentrated force at a single point. This greatly improves the overall strength and stability of the initial limiting structure. The connecting rope 16 is broken in the middle and connected by a V-shaped block 17. The V-shaped block 17 is attached to the surface of the vertical part 20. In the initial state, the V-shaped block 17 can stably tighten the connecting rope 16 to ensure that the limiting structure is firm and reliable. When the slurry pressure in the pipe reaches the set threshold, the slurry impact can precisely tear the V-shaped block 17, realizing the controllable breakage and unlocking of the limiting structure. The pressure triggering accuracy is higher, avoiding the uncertainty of random breakage of traditional ropes. After the V-shaped block 17 breaks, it can remain between the two sets of side plates 12. When the slurry flows through, it can cut and refine the slurry clumps again, continuously optimizing the slurry fluidity and stabilizing the grouting operation pressure.

[0033] like Figure 6 As shown in this embodiment, a through hole 18 is provided at the top of the V-block 17. The through hole 18 is located in the middle of the V-block 17. During the grouting operation, the grout flowing in the pipe can flow smoothly through the through hole 18, effectively diverting the impact force of the grout, reducing the continuous impact load of the grout on the V-block 17, avoiding premature fatigue fracture of the V-block 17 and the connecting rope 16 during the low-pressure operation stage, and ensuring the structural stability of the equipment under normal grouting conditions.

[0034] Working principle: The grouting pipe 1 is vertically pressed into the sand foundation of the dam. During the pre-embedding process, the arc-shaped part 8 at the bottom of the protrusion 7 guides and slides the surrounding sand, which greatly reduces the jacking force of the grouting pipe 1 when it is pressed in, reduces the load on the equipment, and at the same time reduces the cutting disturbance to the surrounding sand, preventing the sand from collapsing and backfilling. The protrusion 7 simultaneously forms a void channel around the grouting hole 2 and the strip hole 4, which reduces the resistance to subsequent grout seepage and provides the basic conditions for uniform grouting, thus completing the positioning and pre-embedding of the grouting pipe 1. The dual-liquid grouting machine is started, and the mixed grout is transported to the grouting pipe 1 through the pipeline. At this time, the equipment is in the initial limit state. The sealing plate 5 is stored inside the strip hole 4. The side plate 12 is precisely engaged in the positioning groove 15 of the vertical part 20 of the L-shaped limit column 13. Multiple sets of staggered connecting ropes 16 are tightly attached to the vertical part 20. With the help of the V-shaped block 17, the limit is tightened and the sealing plate 5 is firmly fixed, preventing it from rotating and opening at will. When the grout flows through the L-shaped limit column 13, the bidirectional symmetrical inclined surface 14 at the top diverts and refines the gel-state grout, divides the large volume of grout, and reduces the grouting pressure. The refined grout seeps out from the grouting hole 2 at a uniform speed, realizing low-pressure and stable grouting of sand base. As grouting continues, the sand-based pores are gradually filled with grout, and the grout pressure inside the grouting pipe 1 continues to rise. When the pressure reaches the set threshold, the impact force of the grout squeezes the V-shaped block 17, causing the V-shaped block 17 to break and releasing the limiting constraint of the connecting rope 16. The broken V-shaped block 17 remains between the two sets of side plates 12. After the limiting is released, the side plates 12 are released from the constraint of the positioning groove 15, and the sealing plate 5 rotates outward along the rotating shaft 11 through the bottom rotating part 6. During the rotation, the guide surface 10 at the bottom of the limiting groove 9 can discharge the residual sand and gravel in the groove to prevent jamming. At the same time, the limiting groove 9 restricts the excessive rotation of the sealing plate 5 to ensure that the opening and closing range is controllable. After the sealing plate 5 is completely rotated out of the strip hole 4, it actively removes the surrounding sand and soil to form a temporary cavity, which greatly increases the initial penetration area of ​​the grout. At the same time, the sealing plate 5 forms an oblique flow guide structure, which guides the mixed grout discharged from the strip hole 4 to diffuse obliquely upward and flow precisely to the area where the previous grouting is weak and there are residual voids. There is no need to forcibly increase the grouting pressure, which effectively avoids the problems of stratum splitting, pipe wall grout leakage, etc., expands the grout diffusion range, and improves the uniformity and efficiency of sand-based grouting. During the operation, the side plate 12 forms a regular grout flow channel, which, together with the residual V-shaped block 17, continuously refines the grout, stabilizes the grouting pressure, and ensures continuous and stable grouting operation. When local sand base experiences grouting obstruction, sudden pressure increase, or insufficient grouting again, use a wrench to engage the hexagonal sleeve 21 at the top of the grouting pipe 1, causing the grouting pipe 1 to rotate as a whole. Precisely adjust the grouting direction of the strip hole 4 and the sealing plate 5, aligning them with the blind and weak areas of the sand base grouting. By rotating and adjusting the direction, change the grout diffusion direction, and carry out high-pressure seepage expansion and grouting operations again to eliminate local grouting gaps and further improve the grouting density and overall seepage prevention performance of the sand base. After all the sand base grouting work on the dam is completed, the double-liquid grouting machine is turned off and the grout delivery is stopped. Then, the grouting pipe that extends beyond the sand base is cut off and the grouting pipe that was previously embedded in the sand base is sealed.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-seepage-proof dam sand-based grouting device, comprising a grouting pipe (1) and a dual-liquid grouting machine, wherein the outlet of the dual-liquid grouting machine is connected to the grouting pipe (1) via a pipe, and the surface of the grouting pipe (1) is provided with a plurality of grouting holes (2), characterized in that, Also includes: The auxiliary grouting mechanism (3) includes multiple strip holes (4) on the surface of the grouting pipe (1). The strip holes (4) are aligned vertically with the grouting holes (2) and are located above the corresponding grouting holes (2). A sealing plate (5) is rotatably connected inside the strip holes (4). A limit component is provided inside the grouting pipe (1) to limit the rotation of the sealing plate (5). After the pressure inside the grouting pipe (1) increases, the limit component releases the restriction, and the sealing plate (5) rotates outward. The surface of the grouting pipe (1) and the sealing plate (5) near the top are fixed. A hexagonal sleeve (21) is fixedly connected. The limiting assembly includes two side plates (12) symmetrically fixed on the surface of the rotating plate. The side plates (12) are located inside the grouting pipe (1). An L-shaped limiting post (13) is fixed on the inner wall of the grouting pipe (1). The L-shaped limiting post (13) is composed of a horizontal part (19) and a vertical part (20). The initial side plate (12) is attached to the surface of the vertical part (20). Multiple connecting ropes (16) are connected between the two side plates (12) located on the same vertical part (20). The connecting ropes (16) are attached to the vertical part (20).

2. The high-seepage-proof dam sand-based grouting equipment according to claim 1, characterized in that, The surface of the grouting pipe (1) is fixed with a protrusion (7), which is located at the strip hole (4). A groove is provided on the surface of the protrusion (7), which is connected to the strip hole (4). A rotating shaft (11) is fixedly connected to the inner wall of the groove. A rotating part (6) is integrally formed at the bottom of the sealing plate (5). The rotating part (6) is rotatably connected to the surface of the rotating shaft (11). The side of the rotating part (6) is slidably connected to the inner wall of the strip hole (4) and the groove. A limiting groove (9) is provided on the surface of the protrusion (7).

3. The high-seepage-proof dam sand-based grouting equipment according to claim 2, characterized in that, The bottom of the protrusion (7) is provided with an arc-shaped part (8).

4. The high-seepage-proof dam sand-based grouting equipment according to claim 2, characterized in that, The bottom of the limiting groove (9) is provided with a guide surface (10), and the guide surface (10) is lower on the side away from the grouting pipe (1).

5. The high-seepage-proof dam sand-based grouting equipment according to claim 1, characterized in that, The vertical part (20) has a positioning groove (15) on its surface, and the side plate (12) abuts against the inner wall of the positioning groove (15).

6. The high-seepage-proof dam sand-based grouting equipment according to claim 1, characterized in that, The top of the horizontal part (19) has two symmetrically opened inclined surfaces (14), and the connection between the two inclined surfaces (14) is high.

7. The high-seepage-proof dam sand-based grouting equipment according to claim 1, characterized in that, The adjacent connecting ropes (16) are staggered vertically.

8. The high-seepage-proof dam sand-based grouting equipment according to claim 7, characterized in that, The connecting rope (16) is broken in the middle and connected by a V-shaped block (17), which is attached to the surface of the vertical part (20).

9. The high-seepage-proof dam sand-based grouting equipment according to claim 8, characterized in that, The top of the V-shaped block (17) is provided with a through hole (18), which is located in the middle of the V-shaped block (17).

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