A method for repairing leakage and reinforcing structure of a rubble dam of a landfill

Abstract

The present application relates to the technical field of landfill environment governance, and discloses a method for repairing leakage and reinforcing structure of a mortar stone dam of a landfill. The present application is aimed at the problem that sewage leakage and structural safety hazards are prone to occur in the steep mortar stone dam structure of the landfill, and solves the leakage risk by pointing and adding an anti-seepage structure layer. In view of the technical problem that it is difficult to anchor the anti-seepage structure layer on the steep mortar stone dam structure of the landfill, the anti-seepage panel is used to fix the anti-seepage structure layer and reinforce the mortar stone dam structure. In view of the problem that the anti-seepage panel and the mortar stone dam structure are difficult to be effectively connected and are prone to overturning risk, a steel pipe pile or an anchor rod or a concrete support is used for fixation. Through the combination of the three forms, the anti-seepage effect meets the anti-seepage requirements of the environmental protection industry, which not only solves the problem of leakage risk of leachate in the steep mortar stone dam structure of the landfill, but also effectively reinforces the dam body structure of the mortar stone dam and eliminates the structural safety hazards.

Description

Technical Field

[0001] This invention relates to the field of landfill environmental remediation technology, and in particular to a method for repairing leakage and reinforcing the structure of a masonry dam in a landfill. Background Technology

[0002] Landfills are surrounded by masonry dams to block waste and create landfill capacity. As the landfill operates for longer periods, the landfill's anti-seepage system deteriorates. Because the existing masonry dam walls are constructed with cement mortar joints, they only provide mechanical support and do not prevent seepage. When acidic leachate seeps in, the cement mortar inside the masonry dam walls is easily corroded, resulting in powdering and voids. This allows leachate to penetrate the walls and pollute the environment.

[0003] Landfill masonry dams are exposed to leachate corrosion over long periods, making the mortar prone to pulverization and voids, leading to sewage leakage and structural safety hazards. Traditional dam seepage repair techniques primarily involve laying or pouring anti-seepage structures on the upstream face, inside the dam body, or at the dam foundation. These structures utilize the low permeability of the materials and structural design to create a continuous seepage barrier. Common forms include concrete anti-seepage panels, geomembrane anti-seepage panels, and asphalt concrete anti-seepage panels. However, because landfill masonry dam structures are almost perpendicular to the ground, anchoring geomembranes to the masonry dam structure is difficult. Traditional anti-seepage panels require rebar installation to connect to the steep dam body. Since the landfill masonry dam body has an anti-seepage structural layer, rebar installation can damage and render this layer ineffective. Therefore, traditional anti-seepage panels are difficult to connect effectively to the landfill masonry dam body, are prone to overturning, and provide poor reinforcement to the masonry dam structure.

[0004] Furthermore, the complex terrain and limited space of landfills make it difficult for traditional large-scale piling equipment (such as rotary drilling rigs and vibratory hammers) to enter the site, which is not conducive to the fixed installation of steel pipe piles / anchors (depth required >2m). Summary of the Invention

[0005] To address the technical problems mentioned in the background section, this invention provides a method for repairing leakage and reinforcing the structure of a masonry dam in a landfill.

[0006] This invention is achieved using the following technical solution: a method for repairing leakage and reinforcing the structure of a masonry dam in a landfill, comprising: The dam body has a top anchoring trench and a toe anchoring trench, respectively. Waterproof mortar is filled at the connection between the top anchoring trench and the toe anchoring trench on one side of the dam body. An anti-seepage structural layer is set outside the waterproof mortar. A reinforced concrete anti-seepage panel is installed outside the anti-seepage structural layer. A horizontal reinforced concrete pier is fixedly connected to the bottom of the reinforced concrete anti-seepage panel. The toe anchoring trench is located below the reinforced concrete pier on the side closer to the dam body. Several limiting piles are installed in sequence at the reinforced concrete pier. The reinforcement method steps are as follows: S1. Defect cleaning and jointing: Clean the areas where powdery voids appear in the masonry dam wall; re-joint the cleaned gaps with waterproof mortar, with a thickness of not less than 20mm, to restore the compactness of the masonry. S2. Laying the seepage-proof structural layer: Material selection: Main impermeable layer: 1.0-2.0mm thick rough HDPE geomembrane; Protective layer: geotextile or sodium bentonite waterproof blanket on both sides; Laying method: Continuous laying from the top of the dam to the toe of the dam. Anchoring treatment: Excavate anchoring trenches at the top and toe of the dam, bury the end of the seepage prevention structure layer in the trench, backfill and compact it to fix it. The size of the anchoring trench is not less than 800mm×800mm (specifically, width×height), and the distance between the anchoring trench and the edge of the slope should not be less than 800mm. S3. Casting anti-seepage reinforced concrete anti-seepage panels: Structural design: A seepage-resistant reinforced concrete seepage-proof panel is poured on the surface of the seepage-proof structural layer. A double-layer bidirectional steel mesh is laid inside the panel, and the thickness of the seepage-proof panel is not less than 600mm. Crack prevention measures: Install vertical joints to prevent concrete from cracking due to temperature or settlement; S4. Dam structure reinforcement: Construction of limiting piles: Limiting piles are driven into the toe of the masonry dam, with the pile tip penetrating the bearing layer to a depth of ≥2m; Pier connection: A concrete pier is poured on top of the limiting piles, with a thickness of not less than 1200mm, connecting the limiting piles and the reinforced concrete anti-seepage panel into a whole. Alternative solution: Anchor bolts or concrete supports can be used instead of limit piles for fixation.

[0007] S5. Overall Stability Integration: The reinforced concrete anti-seepage panel, limiting piles and masonry dam body are rigidly connected by a concrete foundation to form a composite structural system, ensuring: the overturning resistance of the reinforced concrete anti-seepage panel and the structural stability of the masonry dam body.

[0008] An auxiliary device for fixing piles of a landfill masonry dam includes: The base plate has two vertical supports symmetrically fixedly connected to one side of the top of the base plate. Each support has a vertical groove in the middle of its outer side. An energy storage component and a release component are connected to the two vertical grooves respectively. A round hole is opened at the top of the other end of the base plate. Limiting components are symmetrically fixedly connected to both sides of the round hole. A striking component is connected inside the limiting component. The other side of the striking component is connected to the energy storage component. The energy storage component raises the striking component and releases kinetic energy under the release component. The released striking component applies pressure to the limit pile and gradually transports the limit pile to the ground.

[0009] As a further improvement to the above scheme, the energy storage component includes a fixed rod fixedly connected to the inner sides of two supports. A turntable is rotatably connected to the middle of the fixed rod. A toothed opening is provided on one side of the turntable. A connecting rod is fixedly connected to the outer wall of the inner end of the turntable. The connecting rod consists of a bent section and a horizontal section. The bent section is connected to the outer wall of the turntable, and the horizontal section has an opening. A movable rod is slidably connected to the horizontal section. The movable rod is located at the outer end of the connecting rod and connected to the striking element. A connecting sleeve is fixedly connected to the bottom end of the movable rod near the striking element. A telescopic cylinder is rotatably connected to the bottom end of the device, and a connecting sleeve plate is rotatably connected to the bottom end of the telescopic cylinder. The bottom end of the connecting sleeve plate is fixedly connected to the top end of the base plate. The energy storage device also includes a rotating disk that is slidably connected to the outer wall of the fixed rod. A toothed opening is provided on one side of the rotating disk, which can mesh with a toothed opening. An annular protrusion is fixedly connected to the middle of the outer wall of the rotating disk. A connecting turntable is rotatably connected to the outside of the annular protrusion. An external gear is fixedly connected to the outer wall of the connecting turntable. Several annular inclined blocks connected end to end are evenly provided on the side of the connecting turntable away from the toothed opening.

[0010] As a further improvement to the above scheme, a fixed ring is coaxially fixedly connected to one side of the rotating disk. Several spring plates are sequentially fixedly connected to the outer wall of the fixed ring. Each spring plate faces the same direction of rotation. Each spring plate can abut against a matching annular inclined block. There are two ways for the connecting turntable to rotate. In the first way, the annular inclined block will push the abutting spring plate and make the turntable rotate with it. In the second way, after the inclined side of the annular inclined block abuts against the spring plate, the spring plate will slide, ensuring that the connecting turntable rotates while the rotating disk does not rotate. An inner cylinder is coaxially fixedly connected to one side of the rotating disk. The inner cylinder is located inside the fixed ring. An outer cylinder is slidably connected to the outer cylinder along the center line of the fixed rod. A connecting protrusion is fixedly connected to the outer wall of the inner cylinder near the fixed ring. An inner spring is connected to the inner cylinder at the inner side of the outer cylinder. The inner cylinder, outer cylinder, and inner spring are all sleeved on the outer wall of the fixed rod. Several spring plates are uniformly fixedly connected to the outer wall of the outer cylinder.

[0011] As a further improvement to the above scheme, a fixed ring is coaxially fixedly connected to the inner side of the support and the fixed rod. Several annular inclined blocks II connected end to end are evenly opened in the fixed ring. The inclination direction of the annular inclined blocks II is the same as that of the annular inclined blocks I. The annular inclined blocks II slide / abut against the spring plate II.

[0012] As a further improvement to the above scheme, the energy storage device also includes a pedal that slides vertically in a vertical groove. A rack plate is fixedly connected to one side of the pedal plate. The rack plate meshes with an external gear, and a return device is provided at the bottom of the rack plate.

[0013] As a further improvement to the above solution, the release component includes a return spring fixedly connected to the outer wall of a support. The return spring is coaxially arranged with the fixed rod. A spring plate is fixedly connected to the outer wall of the return spring. A crossbar is fixedly connected to the top center of the spring plate. Protrusions are symmetrically fixedly connected to both sides of the middle of the crossbar. A rotating inner collar is fixedly connected to the bottom of the other side of the crossbar. The rotating inner collar is rotatably connected to the connecting protrusion.

[0014] As a further improvement to the above solution, the release component also includes a lower pressure block. The lower pressure block has a slot in the middle, which slides vertically with the protrusion. The inner side of the bottom end of the lower pressure block is sloped, and the top of the lower pressure block abuts against a pressure plate. A second pedal is fixedly connected to the outside of the pressure plate. The inner side of the second pedal slides vertically with another vertical groove. By stepping on the second pedal, the pressure plate can push the lower pressure block down. With the slope of the bottom end of the lower pressure block sliding at the top of the support, the entire lower pressure block and the crossbar slide. With the rotating inner collar and the connecting protrusion rotating, the entire rotating disk slides and the engagement of the second tooth and the first tooth is released. Thus, the entire connecting rod will return to its original position under the kinetic energy of the telescopic cylinder contraction.

[0015] As a further improvement to the above solution, the limiting component includes a U-shaped seat that is symmetrically fixedly connected to the other side of the top of the base plate. The two U-shaped seats are provided with vertical movable grooves in the middle. The top of the two movable grooves are open. An inverted U-shaped insert plate is vertically slidably connected in the two movable grooves.

[0016] As a further improvement to the above solution, the striking component includes a rotating sleeve plate rotatably connected to the outer end of the movable rod. A sliding plate is fixedly connected to the bottom end of the rotating sleeve plate. The sliding plate slides vertically in two movable grooves. A striking block is fixedly connected to the middle of the bottom end of the sliding plate. The bottom end of the striking block is coaxial with the round hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention addresses the potential for sewage leakage and structural safety hazards in steep masonry dam structures at landfills. It employs grouting and the laying of an impermeable structural layer to resolve the leakage risks posed by landfill leachate. Through a multi-layered design of the impermeable structural layer, the invention achieves protection of the HDPE geomembrane with a sodium-based bentonite waterproof blanket or geotextile, resisting acidic corrosion from landfill leachate and extending the lifespan of the impermeable layer.

[0018] This invention addresses the technical challenge of anchoring the anti-seepage structural layer to the steep masonry dam structure in landfills. It employs concrete anti-seepage panels to fix the anti-seepage structural layer while simultaneously reinforcing the masonry dam structure.

[0019] This invention addresses the risk of overturning due to the difficulty in effectively connecting the seepage-proof panel to the masonry dam structure. It employs steel pipe piles, anchor rods, or concrete supports for fixation. The steel pipe piles (limiting piles) used in this invention penetrate ≥2m into the bearing layer and are rigidly connected to the panel through a concrete foundation. This completely eliminates the risk of seepage layer damage and panel overturning caused by traditional rebar installation. The pile foundation system replaces rebar installation and ultimately solves the hidden danger of panel overturning.

[0020] This invention solves the problem of large equipment entering narrow spaces by using a special piling auxiliary device. Through the mechanical design of pedal energy storage and vertical downward pressing of the striking block, an energy storage-release mechanism is realized to achieve efficient manual piling.

[0021] This invention combines three components—a seepage-proof structural layer, seepage-proof panels, and steel pipe piles—to achieve seepage prevention performance in the treated masonry dam that meets environmental protection industry requirements (permeability coefficient less than 10). -7 The speed of the dam (cm / s) not only solved the risk of leachate leakage from the steep masonry dam structure of the landfill, but also effectively reinforced the dam structure and eliminated structural safety hazards.

[0022] This invention achieves simultaneous reinforcement of the dam foundation by integrating the pile cap and the anti-seepage panel with steel pipe piles. The concrete panel has a built-in double-layer steel mesh and vertical joints to avoid cracking due to unevenness of the dam body and improve overall stability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a method for repairing leakage and reinforcing a masonry dam structure in a landfill proposed in this invention. Figure 2 This is a schematic diagram of the structure of an auxiliary device for fixing piles of a masonry dam in a landfill, as proposed in this invention. Figure 3 For the present invention Figure 2 A top-view structural diagram; Figure 4 For the present invention Figure 3 Schematic diagram of the structural cross-section in the AA direction; Figure 5 This is a schematic diagram of the limiting component structure of the present invention; Figure 6 This is a schematic diagram of the connection structure between the energy storage element and the release element of the present invention; Figure 7 This is a schematic diagram of the energy storage and release components of the present invention from another perspective; Figure 8 This is a cross-sectional structural diagram of the release element of the present invention; Figure 9 This is a schematic diagram of the explosion and cross-sectional structure of the release component of the present invention.

[0024] Explanation of key symbols: 1. Dam body; 11. Waterproof mortar; 12. Seepage-proof structural layer; 13. Reinforced concrete seepage-proof panel; 14. Limiting pile; 15. Dam crest anchoring trench; 16. Dam toe anchoring trench; 17. Reinforced concrete foundation; 2. Base slab; 21. Support; 22. Vertical groove; 23. Fixing rod; 24. Turntable; 25. Connecting rod; 26. Movable rod; 27. Rotating sleeve plate; 28. U-shaped seat; 29. ​​Inverted U-shaped insert plate; 30. Movable groove; 31. Sliding plate; 32. Striking block; 33. Pedal one; 34. Rack plate; 35. Pedal two; 36. 37. Pressure plate; 38. Lower pressure block; 39. Groove; 40. Crossbar; 41. Spring round plate; 42. Return spring; 43. Rotating inner collar; 44. Toothed opening one; 45. Rotating disk; 46. Toothed opening two; 47. Annular protrusion; 48. Connecting turntable; 49. External gear; 50. Annular inclined block one; 51. Fixed ring; 52. Spring plate one; 53. Inner cylinder; 54. Outer cylinder; 55. Inner spring; 56. Spring plate two; 57. Fixed ring; 58. Annular inclined block two; 59. Connecting sleeve one; 60. Telescopic cylinder; 61. Connecting sleeve two. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] Example 1: Please refer to Figure 1 This embodiment of a method for repairing leakage and reinforcing a masonry dam structure in a landfill includes: The dam body 1 has a top anchoring trench 15 and a toe anchoring trench 16 respectively. Waterproof mortar 11 is filled at the connection between the top anchoring trench 15 and the toe anchoring trench 16 on one side of the dam body 1. An anti-seepage structural layer 12 is set outside the waterproof mortar 11. A reinforced concrete anti-seepage panel 13 is installed outside the anti-seepage structural layer 12. A horizontal reinforced concrete foundation 17 is fixedly connected to the bottom of the reinforced concrete anti-seepage panel 13. The toe anchoring trench 16 is located below the reinforced concrete foundation 17 on the side closer to the dam body 1. Several limiting piles 14 are installed sequentially at the reinforced concrete foundation 17.

[0027] The specific steps are as follows: S1. Defect cleaning and grouting: Clean the areas where powdery voids appear in the masonry dam wall (remove loose, corroded mortar and debris); re-grout the cleaned gaps with waterproof mortar, with a thickness of not less than 20mm, to restore the compactness of the masonry.

[0028] S2. Laying the seepage-proof structural layer 12: Material selection: Main geomembrane: 1.0-2.0mm thick rough HDPE geomembrane (meeting a permeability coefficient <10) -7 cm / s); Protective layer: geotextile or sodium bentonite waterproofing blanket on both sides (to protect the HDPE membrane from mechanical damage).

[0029] Laying method: Continuous laying from the dam crest to the dam toe. Anchoring treatment: Anchoring trenches are excavated at the dam crest and toe, and the ends of the seepage-proof structural layer 12 are buried in the trenches, backfilled, and compacted for fixation. The dimensions of the anchoring trenches are not less than 800mm × 800mm (specifically, width × height), and the distance between the anchoring trenches and the edge of the slope should not be less than 800mm.

[0030] S3, Casting anti-seepage reinforced concrete anti-seepage panel 13: Structural design: A seepage-resistant reinforced concrete seepage-proof panel 13 is poured on the surface of the seepage-proof structural layer 12. A double-layer bidirectional steel mesh is laid inside the panel (to enhance crack resistance and adapt to uneven surfaces of the masonry dam). The thickness of the seepage-proof panel is not less than 600mm.

[0031] Crack prevention measures: Install vertical joints (such as expansion joints) to prevent concrete from cracking due to temperature or settlement.

[0032] S4. Dam body 1 structural reinforcement: Construction of limiting pile 14: Limiting pile 14 is driven into the bearing layer at the toe of the masonry dam, with the pile tip penetrating the bearing layer to a depth of ≥2m; Pier connection: A concrete pier is poured on top of the limiting pile 14, with a thickness of not less than 1200mm, connecting the limiting pile 14 and the reinforced concrete anti-seepage panel 13 into a whole. Alternative solution: Anchor bolts or concrete supports can be used instead of the limiting pile 14 for fixation.

[0033] S5. Overall stability integration: The reinforced concrete anti-seepage panel 13 and the limiting pile 14 are rigidly connected to the masonry dam body through the concrete foundation to form a composite structural system, ensuring: the overturning resistance of the reinforced concrete anti-seepage panel 13 and the structural stability of the masonry dam body.

[0034] Example 2: Combination Figures 1-9 This embodiment of an auxiliary device for fixing piles of a landfill masonry dam includes: The base plate 2 has two vertical supports 21 symmetrically fixedly connected to one side of its top end. Each support 21 has a vertical groove 22 in the middle of its outer side. An energy storage component and a release component are respectively connected to the two vertical grooves 22. A round hole is opened at the top of the other end of the base plate 2. Limiting components are symmetrically fixedly connected to both sides of the round hole. A striking component is connected inside the limiting component. The other side of the striking component is connected to the energy storage component. The energy storage component raises the striking component and releases kinetic energy under the release component. The released striking component applies pressure to the limiting pile 14 and gradually transports the limiting pile 14 to the ground.

[0035] The energy storage device includes a fixed rod 23 fixedly connected to the inner side of two supports 21. A turntable 24 is rotatably connected to the middle of the fixed rod 23. A toothed opening 43 is provided on one side of the turntable 24. A connecting rod 25 is fixedly connected to the outer wall of the inner end of the turntable 24. The connecting rod 25 consists of a bent section and a horizontal section. The bent section is connected to the outer wall of the turntable 24. The horizontal section has an opening. A movable rod 26 is slidably connected in the horizontal section. The movable rod 26 is located at the outer end of the connecting rod 25 and is connected to the striking element.

[0036] A connecting sleeve 58 is fixedly connected to the bottom end of the movable rod 26 near the direction of the striking part. A telescopic cylinder 59 is rotatably connected to the bottom end of the connecting sleeve 58. A connecting sleeve 60 is rotatably connected to the bottom end of the telescopic cylinder 59. The bottom end of the connecting sleeve 60 is fixedly connected to the top end of the base plate 2.

[0037] Furthermore, the telescopic cylinder 59 is a connection of two inner rods / outer tubes that slide together, and a strong spring is elastically connected at the connection between the connecting sleeve 1 58 and the connecting sleeve 2 60. The telescopic cylinder 59 may be a strong hydraulic rod, as long as it can generate kinetic energy. The specific choice depends on the actual construction environment.

[0038] The energy storage device also includes a rotating disk 44 that is slidably connected to the outer wall of the fixed rod 23. A toothed opening 45 is provided on one side of the rotating disk 44, which can mesh with a toothed opening 43. An annular protrusion 46 is fixedly connected to the middle of the outer wall of the rotating disk 44. A connecting disk 47 is rotatably connected to the annular protrusion 46. An external gear 48 is fixedly connected to the outer wall of the connecting disk 47. Several annular inclined blocks 49 connected end to end are evenly provided on the side of the connecting disk 47 away from the toothed opening 45.

[0039] A fixed ring 50 is coaxially fixed to one side of the rotating disk 44. Several spring plates 51 are fixedly connected to the outer wall of the fixed ring 50 in sequence. Each spring plate 51 faces the same direction of rotation. Each spring plate 51 can abut against the matching annular inclined block 49. The connecting turntable 47 has two rotation modes. In mode one, the annular inclined block 49 will push the abutting spring plate 51 and make the rotating disk 44 rotate with it. In mode two, after the inclined side of the annular inclined block 49 abuts against the spring plate 51, the spring plate 51 will slide, ensuring that the connecting turntable 47 rotates while the rotating disk 44 does not rotate.

[0040] An inner cylinder 52 is coaxially fixedly connected to one side of the rotating disk 44. The inner cylinder 52 is located inside the fixing ring 50. An outer cylinder 53 is slidably connected to the outer side of the inner cylinder 52 along the center line of the fixing rod 23. A connecting protrusion is fixedly connected to the outer wall of the inner cylinder 52 near the fixing ring 50. An inner spring 54 is connected to the inner cylinder 52 on the inner side of the outer cylinder 53. The inner cylinder 52, outer cylinder 53, and inner spring 54 are all sleeved on the outer wall of the fixing rod 23. Several spring plates 55 are evenly fixedly connected to the outer wall of the outer cylinder 53.

[0041] Furthermore, multiple side strips are uniformly fixedly connected to the outer wall of the inner cylinder 52, and several side grooves are opened at the matching side strips on the inner wall of the outer cylinder 53. The side grooves are slidably connected to the side strips, and the extension direction of the side grooves and side strips is consistent with the center line direction of the fixed rod 23.

[0042] A fixed ring 56 is coaxially fixedly connected to the inner side of the support 21 and the fixed rod 23. Several annular inclined blocks 57 connected end to end are evenly opened in the fixed ring 56. The inclination direction of the annular inclined blocks 57 is the same as that of the annular inclined blocks 49. The annular inclined blocks 57 slide / abut against the spring plate 55.

[0043] Specifically, when the connecting turntable 47 rotates in mode one, it can drive the rotating disk 44 to rotate synchronously, and drive the spring plate 2 55 to slide along the annular inclined block 2 57. When the connecting turntable 47 rotates in mode two, the rotating disk 44 will not rotate, but the telescopic cylinder 59 will attract the tooth 1 43 and drive the rotating disk 44 to rotate in the direction of the connecting turntable 47. However, the entire rotating disk 44 will be kept stable by the obstruction of the annular inclined block 2 57 and the spring plate 2 55.

[0044] The energy storage device also includes a pedal 33 that slides vertically in a vertical groove 22. A rack plate 34 is fixedly connected to one side of the pedal 33. The rack plate 34 meshes with an external gear 48, and a return device is provided at the bottom of the rack plate 34.

[0045] Specifically, the rack plate 34 can be replaced by a powerful motor.

[0046] Furthermore, the repositioning device includes a limiting cylinder, a restoring spring fixedly connected inside the limiting cylinder, a vertical slide rod fixedly connected to the top of the restoring spring, and the top of the vertical slide rod connected to the rack plate 34. It is used to automatically return to the position after the rack plate 34 is pressed down and released. Specifically, pressing down the rack plate 34 will trigger the rotation mode one, and releasing the rack plate 34 will trigger the rotation mode two.

[0047] The release component includes a return spring 41 fixedly connected to the outer wall of a support 21. The return spring 41 is coaxially arranged with the fixed rod 23. A spring plate 40 is fixedly connected to the outer wall of the return spring 41. A crossbar 39 is fixedly connected to the top center of the spring plate 40. Protrusions are symmetrically fixedly connected to both sides of the middle of the crossbar 39. A rotating inner collar 42 is fixedly connected to the bottom end of the other side of the crossbar 39. The rotating inner collar 42 is rotatably connected to the connecting protrusion.

[0048] The release mechanism also includes a lower pressure block 37, with a slot 38 in the middle of the lower pressure block 37. The slot 38 slides vertically with the protrusion. The inner side of the bottom end of the lower pressure block 37 is sloped. The top of the lower pressure block 37 abuts against a pressure plate 36. A second pedal 35 is fixedly connected to the outside of the pressure plate 36. The inner side of the second pedal 35 slides vertically with another vertical groove 22. By stepping on the second pedal 35, the pressure plate 36 can push the lower pressure block 37 down. As the lower pressure block 37 slides at the top of the support 21 with its bottom slope, the entire lower pressure block 37 and the crossbar 39 slide. As the inner collar 42 rotates and connects to the connecting protrusion, the entire rotating disk 44 slides. The second tooth 45 is disengaged from the first tooth 43. Thus, the entire connecting rod 25 will return to its original position under the kinetic energy of the retraction of the telescopic cylinder 59.

[0049] The limiting component includes a U-shaped seat 28 symmetrically fixedly connected to the other side of the top of the base plate 2. Each of the two U-shaped seats 28 has a vertical movable groove 30 in the middle. The top of each movable groove 30 is open. Each movable groove 30 has an inverted U-shaped insert plate 29 vertically slidably connected inside it.

[0050] The striking component includes a rotating sleeve plate 27 rotatably connected to the outer end of the movable rod 26. A sliding plate 31 is fixedly connected to the bottom end of the rotating sleeve plate 27. The sliding plate 31 slides vertically within two movable grooves 30. A striking block 32 is fixedly connected to the middle of the bottom end of the sliding plate 31. The bottom end of the striking block 32 is coaxial with the round hole.

[0051] The implementation principle of the auxiliary device for fixing piles of a landfill masonry dam in this embodiment is as follows: Insert the limiting stake 14 vertically into the round hole and use a tool such as a hammer to drive it into the ground. Move the entire base plate 2 to the reinforced concrete foundation 17, keeping the equipment flat and stable. Then, by continuously pressing down on the pedal 33, the rack plate 34 engages with the external gear 48, triggering the transmission of mode one. The annular inclined block 49, under the obstruction of the spring plate 51, pushes the entire rotating disk 44 to rotate. Relying on the engagement of the toothed joint 45 and the toothed joint 43, the entire connecting rod 25 drives the movable rod 26 and the rotating sleeve 27 to flip outward. (Refer to...) Figure 4It can rotate counterclockwise around the fixed rod 23. The sliding plate 31 can move vertically along the movable groove 30 with the striking block 32. When the connecting rod 25 rotates, it can synchronously drive the telescopic cylinder 59 to rotate and store energy.

[0052] When the connecting rod 25 is rotated to a certain extent, the pressing block 37 can be pushed down by stepping on the second pedal 35. Under the slope of the pressing block 37, the entire crossbar 39 and the inner cylinder 52 will slide outward, thereby disengaging the meshing connection between the second tooth 45 and the first tooth 43. Under the contraction of the telescopic cylinder 59, the connecting rod 25 is quickly triggered to drive the striking block 32 to slide down along the movable groove 30, and under the impact, it strikes the top of the limiting pile 14, quickly and stably pressing down on the limiting pile 14.

[0053] Different accessories can be used to better meet the needs of repairing and stabilizing masonry dams in landfills, and effectively improve work efficiency, depending on the actual usage environment.

[0054] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A method for repairing leakage and reinforcing the structure of a masonry dam in a landfill, characterized in that, The top and outer sides of the dam body (1) are respectively provided with a top anchoring trench (15) and a toe anchoring trench (16). Waterproof mortar (11) is filled at the connection between the top anchoring trench (15) and the toe anchoring trench (16) on one side of the dam body (1). An anti-seepage structure layer (12) is provided outside the waterproof mortar (11). A reinforced concrete anti-seepage panel (13) is installed outside the anti-seepage structure layer (12). A horizontal reinforced concrete foundation (17) is fixedly connected to the bottom of the reinforced concrete anti-seepage panel (13). The toe anchoring trench (16) is located below the reinforced concrete foundation (17) on the side close to the dam body (1). Several limiting piles (14) are installed in sequence at the reinforced concrete foundation (17). The steps for repairing and reinforcing the leakage of the masonry dam structure at the landfill are as follows: S1. Defect cleaning and jointing: Clean the areas with powdery voids in the masonry dam body; re-joint the cleaned gaps with waterproof mortar, with a thickness of not less than 20mm, to restore the compactness of the masonry. S2. Laying the seepage-proof structural layer (12): Material selection: Main geomembrane: 1.0-2.0mm thick rough-surfaced HDPE geomembrane; Protective layer: geotextile or sodium bentonite waterproofing blanket on both sides; Laying method: Continuous laying from the top of the dam to the toe of the dam; Anchoring treatment: Excavate anchoring trenches at the top of the dam and the toe of the dam, bury the end of the seepage prevention structure layer (12) in the trench, backfill and compact it to fix it, the width × height of the anchoring trench shall not be less than 800mm × 800mm, and the distance between the anchoring trench and the edge of the slope shall not be less than 800mm. S3. Cast reinforced concrete anti-seepage panel (13): Structural design: A reinforced concrete anti-seepage panel (13) is poured on the surface of the anti-seepage structural layer (12), and a double-layer bidirectional steel mesh is laid inside the panel. The thickness of the anti-seepage panel is not less than 600mm. Crack prevention measures: Install vertical joints to prevent concrete from cracking due to temperature or settlement; S4. Dam body (1) structural reinforcement: Construction of limiting piles (14): Limiting piles (14) are driven into the toe of the masonry dam, with the pile tip penetrating the bearing layer to a depth ≥2m; the limiting piles (14) are driven into the masonry dam fixed pile auxiliary device of the landfill; the landfill masonry dam fixed pile auxiliary device includes a base plate (2), two vertical supports (21) are symmetrically fixedly connected to one side of the top of the base plate (2), and vertical grooves (22) are opened in the middle of the outer side of the two supports (21). Energy storage and release components are connected to the two vertical grooves (22) respectively. A round hole is opened at the top of the other end of the base plate (2), and limiting components are symmetrically fixedly connected on both sides of the round hole. A striking component is connected inside the limiting component, and the other side of the striking component is connected to the energy storage component; wherein, the energy storage component lifts the striking component and releases kinetic energy under the release component, and the released striking component applies pressure to the limiting piles (14) and gradually transports the limiting piles (14) to the ground; Pier connection: A reinforced concrete pier is poured on top of the limiting pile (14), with a thickness of not less than 1200mm, to connect the limiting pile (14) and the reinforced concrete anti-seepage panel (13) into a whole. S5. Overall stability integration: The reinforced concrete anti-seepage panel (13), the limiting pile (14) and the masonry dam body are rigidly connected by the reinforced concrete foundation to form a composite structural system, ensuring the overturning resistance of the reinforced concrete anti-seepage panel (13) and the structural stability of the masonry dam body.

2. An auxiliary device for fixing piles of masonry dams in landfills, characterized in that, It is applied to the method for repairing leakage and reinforcing the structure of a masonry dam in a landfill as described in claim 1; The auxiliary device for the fixed pile of the landfill masonry dam includes a base plate (2). Two vertical supports (21) are symmetrically fixed to one side of the top of the base plate (2). Vertical grooves (22) are opened in the middle of the outer side of the two supports (21). Energy storage and release components are connected to the two vertical grooves (22) respectively. A circular hole is opened at the top of the other end of the base plate (2). Limiting components are symmetrically fixed to both sides of the circular hole. A striking component is connected inside the limiting component. The other side of the striking component is connected to the energy storage component. The energy storage component lifts the striking component and releases kinetic energy under the release component. The released striking component applies pressure to the limiting pile (14) and gradually transports the limiting pile (14) to the ground. The energy storage component includes a fixed rod (23) fixedly connected to the inner side of two supports (21). A turntable (24) is rotatably connected to the middle of the fixed rod (23). A toothed opening (43) is provided on one side of the turntable (24). A connecting rod (25) is fixedly connected to the outer wall of the inner end of the turntable (24). The connecting rod (25) is composed of a bent section and a horizontal section. The bent section is connected to the outer wall of the turntable (24). The horizontal section is open. A movable rod (26) is slidably connected to the horizontal section. The movable rod (26) is located at the outer end of the connecting rod (25) and connected to the striking element. A connecting sleeve (58) is fixedly connected to the bottom end of the connecting rod (25) near the striking element. A telescopic cylinder (59) is rotatably connected to the bottom end of the connecting sleeve (58). The telescopic cylinder (59) is rotatably connected to a connecting sleeve plate two (60), and the bottom end of the connecting sleeve plate two (60) is fixedly connected to the top end of the base plate (2). The energy storage component also includes a rotating disk (44) slidably connected to the outer wall of the fixed rod (23). A toothed mouth two (45) is opened on one side of the rotating disk (44), and the toothed mouth two (45) meshes with the toothed mouth one (43). An annular protrusion (46) is fixedly connected to the middle of the outer wall of the rotating disk (44). A connecting turntable (47) is rotatably connected to the annular protrusion (46). An external gear (48) is fixedly connected to the outer wall of the connecting turntable (47). Several annular inclined blocks one (49) connected end to end are evenly opened on the side of the connecting turntable (47) away from the toothed mouth two (45). A fixed ring (50) is coaxially fixed to one side of the rotating disk (44). Several spring plates (51) are sequentially fixed to the outer wall of the fixed ring (50). Each spring plate (51) faces the same direction of rotation. Each spring plate (51) can abut against a matching annular inclined block (49). The connecting turntable (47) has two rotation modes. Mode 1: The annular inclined block (49) will push the abutting spring plate (51) and make the rotating disk (44) rotate accordingly. Mode 2: After the inclined side of the annular inclined block (49) abuts against the spring plate (51), the spring plate (51) will slide, ensuring that the connecting turntable (47) rotates. The rotating disk (44) rotates while the rotating disk (44) does not rotate. An inner cylinder (52) is coaxially fixedly connected to one side of the rotating disk (44). The inner cylinder (52) is located inside the fixed ring (50). An outer cylinder (53) is slidably connected to the outer side of the inner cylinder (52) along the center line of the fixed rod (23). A connecting protrusion is fixedly connected to the outer wall of the inner cylinder (52) near the fixed ring (50). An inner spring (54) is connected to the inner cylinder (52) at the inner side of the outer cylinder (53). The inner cylinder (52), outer cylinder (53), and inner spring (54) are all sleeved on the outer wall of the fixed rod (23). Several spring plates (55) are evenly fixedly connected to the outer wall of the outer cylinder (53) in a circumferential direction. The support (21) is coaxially fixedly connected to the fixing rod (23) with a fixing ring (56). The fixing ring (56) is evenly provided with a number of annular inclined blocks (57) connected end to end. The annular inclined blocks (57) and the annular inclined blocks (49) are inclined in the same direction. The annular inclined blocks (57) slide / abut against the spring plate (55). The energy storage device also includes a pedal (33) that slides vertically in a vertical groove (22). A rack plate (34) is fixedly connected to one side of the pedal (33). The rack plate (34) meshes with an external gear (48), and a return device is provided at the bottom of the rack plate (34). The release component includes a return spring (41) fixedly connected to the outer wall of a support (21). The return spring (41) is coaxially arranged with the fixed rod (23). A spring plate (40) is fixedly connected to the outer wall of the return spring (41). A crossbar (39) is fixedly connected to the top center of the spring plate (40). Protrusions are symmetrically fixedly connected to both sides of the middle of the crossbar (39). A rotating inner collar (42) is fixedly connected to the bottom end of the other side of the crossbar (39). The rotating inner collar (42) is rotatably connected to the connecting protrusion. The release mechanism also includes a pressing block (37), which has a slot (38) in the middle. The slot (38) slides vertically with the protrusion. The inner side of the bottom end of the pressing block (37) is sloped. The top of the pressing block (37) abuts against a pressure plate (36). A second pedal (35) is fixedly connected to the outside of the pressure plate (36). The inner side of the second pedal (35) slides vertically with another vertical groove (22). By stepping on the second pedal (35), the pressure plate (36) can be released. The lowering block (37) is pushed down, and the lowering block (37) slides at the bottom slope of the support (21), pulling the entire lowering block (37) and the crossbar (39) to slide. The rotating inner ring (42) and the connecting protrusion rotate to pull the entire rotating disk (44) to slide, and the toothed mouth two (45) and toothed mouth one (43) are disengaged. As a result, the entire connecting rod (25) will drive the movable rod (26) to return to its position under kinetic energy when the telescopic cylinder (59) contracts.

3. The auxiliary device for fixing piles of a landfill masonry dam as described in claim 2, characterized in that, The limiting component includes a U-shaped seat (28) symmetrically fixedly connected to the other side of the top of the base plate (2). The two U-shaped seats (28) are provided with vertical movable grooves (30) in the middle. The top of the two movable grooves (30) are open. The top of the two U-shaped seats (28) are vertically slidably connected with inverted U-shaped inserts (29).

4. The auxiliary device for fixing piles of a landfill masonry dam as described in claim 3, characterized in that, The striking component includes a rotating sleeve (27) rotatably connected to the outer end of the movable rod (26). A sliding plate (31) is fixedly connected to the bottom end of the rotating sleeve (27). The sliding plate (31) slides vertically in two movable grooves (30). A striking block (32) is fixedly connected to the middle of the bottom end of the sliding plate (31). The bottom end of the striking block (32) is coaxial with the round hole.

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