A multi-layer barrier slurry injection system for contaminated site environmental geology remediation

Abstract

This invention relates to the field of grouting system technology, and in particular to a multi-layer barrier grout injection system for contaminated sites in environmental geological remediation. Existing equipment cannot perform injection and mixing simultaneously, and its operating parameters cannot be adaptively adjusted according to the shape of the foundation pit. This invention provides a multi-layer barrier grout injection system for contaminated sites in environmental geological remediation, comprising a truss with lifting seats on both sides of its lower end. When the main shaft rotates, it enables the L-shaped plate to move back and forth reciprocally, and the grouting nozzle and mixing frame to swing left and right reciprocally. When the main shaft moves up and down, it can change the stroke of the grouting nozzle and mixing frame's left and right swinging motion. The truss contains a reversing mechanism, which includes two movable reversing baffles. When the reversing baffles move, they can change the stroke of the L-shaped plate's back and forth movement. Injection and mixing can be performed synchronously, and the operating area of ​​the equipment can be adjusted according to the shape of the foundation pit.

Description

Technical Field

[0001] This invention relates to the field of grouting system technology, and in particular to a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites. Background Technology

[0002] In environmental geological remediation projects, foundation pit protection is a crucial step in preventing groundwater infiltration and the migration and spread of pollutants, and the quality of the barrier layer directly determines the protective effect. The core of preparing this type of barrier layer is to inject barrier grout into the bottom of the foundation pit, mix it thoroughly with the in-situ soil, and then solidify it to form a continuous and dense protective barrier. However, existing equipment suffers from two major technical defects: First, the slurry injection and soil mixing processes are independent and cannot be carried out simultaneously. This leads to localized accumulation and uneven diffusion of the slurry after injection, resulting in insufficient mixing with the soil. This not only reduces the density and structural stability of the barrier layer but also prolongs the construction period. Second, the equipment's operating parameters (such as operating width, mixing range, and injection position) are fixed and cannot be adapted to the differences in width and length of different foundation pits. This results in extremely poor equipment versatility, requiring frequent equipment replacement or adjustments to the construction plan when facing diverse foundation pit scenarios. This not only increases construction costs but also easily leads to inadequate mixing in localized areas due to mismatch between the equipment and the foundation pit size, further weakening the overall protective performance of the barrier layer and failing to meet the high standards required for environmental geological remediation projects. Therefore, a multi-layer barrier slurry injection system for contaminated sites in environmental geological remediation is provided to solve the above problems. Summary of the Invention

[0003] This invention addresses the problems of existing equipment not being able to perform injection and mixing simultaneously, and the inability to adapt operating parameters to the shape of the foundation pit. It provides a multi-layer barrier grout injection system for contaminated sites in environmental geological remediation, which allows injection and mixing to be performed synchronously and can adjust the equipment's operating area according to the shape of the foundation pit, effectively solving the problems mentioned in the background art.

[0004] The technical solution adopted by the present invention to solve the above problems is as follows:

[0005] A multi-layer barrier grout injection system for environmental geological remediation of contaminated sites includes a truss. Lifting seats are provided on both sides of the lower end of the truss. A top seat is provided at the lower end of the truss. An L-shaped plate is provided on the inner wall of the top seat. A main shaft capable of rotation and vertical movement is provided on the inner wall of the L-shaped plate. A drive plate is provided at the lower end of the L-shaped plate. A grouting nozzle is provided on the inner wall of the drive plate. A rotatable mixing frame is provided at the lower end of the drive plate. When the main shaft rotates, the L-shaped plate can reciprocate forward and backward, and the grouting nozzle and mixing frame can reciprocate left and right. When the main shaft moves up and down, the stroke of the grouting nozzle and mixing frame can be changed. A reversing mechanism is provided inside the truss. The reversing mechanism includes two movable reversing baffles. When the reversing baffles move, the stroke of the L-shaped plate reciprocating forward and backward can be changed.

[0006] A motor base is slidably connected to the rear end surface of the L-shaped plate, and a main motor is fixedly connected to the motor base. The main shaft is fixedly connected to the output end of the main motor. The rear end of the L-shaped plate is also provided with a first threaded rod that can rotate. A threaded cylinder that is fixedly connected to the motor base is threadedly connected to the outer surface of the first threaded rod.

[0007] A drive disc is provided on one end face of the main shaft. A drive pin is fixedly connected to the non-center part of the front surface of the drive disc. A rocker arm is hinged to the front surface of the L-shaped plate. A long keyway that mates with the drive pin is opened on the inner wall of the rocker arm. Two auxiliary connecting rods that are parallel to the rocker arm and of equal length are also hinged to both sides of the front surface of the L-shaped plate. A connecting rod is hinged to the lower end of the two auxiliary connecting rods. A connecting pin is fixedly connected to the inner wall of the middle part of the connecting rod. The lower end of the rocker arm is rotatably connected to the outer surface of the connecting pin. A drive plate is fixedly connected to the front surface of the connecting pin. The grouting nozzle is fixedly connected to the inner wall of the drive plate.

[0008] The upper end of the swing arm is provided with a sector gear. The inner wall of the upper end of the L-shaped plate is slidably connected with a double-sided rack that meshes with the sector gear. The inner wall of the upper end of the L-shaped plate is also rotatably connected with a first spur gear that meshes with the double-sided rack. The inner wall of the upper end of the L-shaped plate is also slidably connected with an inner plate. A top plate is fixedly connected to the front surface of the inner plate. The stirring rack is installed at the lower end of the top plate. The lower end of the inner plate is provided with a first sliding pin. The upper end of the first spur gear is coaxially fixed with a disc cam that cooperates with the first sliding pin.

[0009] The inner wall of the top plate is slidably connected to an inner slider, and the inner wall of the inner slider is provided with a second motor. The output end of the second motor is fixedly connected to an inner shaft. The lower end of the outer surface of the inner shaft is slidably connected to a stirring shaft. The stirring frame is fixedly connected to the lower end of the outer surface of the stirring shaft. A square slider that is slidably connected to the drive plate is sleeved in the middle of the outer surface of the stirring shaft.

[0010] The top plate is provided with track plates on both sides of its lower end. A U-shaped seat is slidably connected to the lower surface of the top plate. An inner sleeve seat that is slidably connected to the inner wall of the U-shaped seat and rotates with the stirring shaft is provided. A second sliding pin is fixed to both the front and rear surfaces of the inner sleeve seat. A wave groove that cooperates with the second sliding pin is opened on the inner wall of the track plate.

[0011] The top seat is slidably connected to the lower end surface of the truss. A sleeve is rotatably connected to the inner wall of the top seat. A steering spur gear is fixed to the middle of the outer surface of the sleeve. An L-shaped plate is fixed to the lower end of the outer surface of the sleeve. A rectangular frame that can move back and forth is provided at the lower end of the top seat. A spur rack that meshes with the steering spur gear is provided on the inner wall of the rectangular frame. A locking mechanism that cooperates with the rectangular frame is also provided at the lower end of the top seat.

[0012] The locking mechanism includes a mounting box, with a fan-shaped locking pin slidably connected to the inner wall of the mounting box. The mounting box also has a spring that cooperates with the fan-shaped locking pin. Two fan-shaped locking grooves that cooperate with the fan-shaped locking pins are opened on the rectangular frame. A second stop pin that cooperates with the rectangular frame is fixedly connected to the lower side of the inner end face of the two reversing baffles.

[0013] The main shaft has a first bevel gear in the middle of its outer surface. A second bevel gear meshes with the upper end of the first bevel gear. A telescopic shaft is provided on the inner wall of the center of the second bevel gear. The telescopic shaft is rotatably connected to the inner wall of the L-shaped plate. A top box is fixed to the upper surface of the top seat. A sleeve shaft that is slidably connected to the telescopic shaft is provided on the inner wall of the top box. A movable spur gear that can move up and down is fixed to the upper end of the outer surface of the sleeve shaft. An upper rack and a lower rack that cooperate with the movable spur gear are fixed to both sides of the upper surface of the truss.

[0014] Both ends of the top box are rotatably connected to reversing rods, and the inner walls of the upper ends of the reversing rods are rotatably connected to second pull pins. Both ends of the top box are slidably connected to U-shaped sliding plates, and the middle of the U-shaped sliding plates is rotatably connected to first pull pins. A tension spring is provided between the first pull pin and the second pull pin. The inner sides of the two reversing rods are coaxially fixed to reversing discs. The top box is provided with an annular seat that is rotatably connected to the sleeve shaft. Both sides of the outer surface of the annular seat are fixedly connected to third sliding pins. The inner walls of the annular disc are provided with small radius grooves, variable diameter grooves, and large radius grooves that cooperate with the third sliding pins. The inner end face of the reversing baffle is fixedly connected to two first stop pins corresponding to the U-shaped sliding plates.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] In use, when the main motor is started and the main shaft rotates, the L-shaped plate, grouting nozzle, and mixing frame can move back and forth at the lower end of the truss, and can also drive the grouting nozzle and mixing frame to swing left and right. That is, the corresponding grouting nozzle and mixing frame can move back and forth and swing left and right simultaneously, uniformly injecting barrier grout over a large area at the bottom of the foundation pit. Furthermore, after injection, the rotation and movement of the mixing frame can fully mix the barrier grout and the in-situ soil, thereby forming a continuous and dense protective barrier. When the main shaft... When moving up and down, the stroke of the grouting nozzle and mixing frame can be adjusted to change the reciprocating left and right swing, thus adapting to the width of the foundation pit. Through the set reversing mechanism, namely two movable reversing baffles, the stroke of the L-shaped plate can be adjusted to change the reciprocating forward and backward movement, thus adapting to the length of the foundation pit. This allows for simultaneous grout injection and soil mixing, enabling the grout to mix efficiently with the in-situ soil immediately after injection, completely solving the problems of uneven mixing and grout accumulation in existing equipment. This technology significantly improves the uniformity and density of the barrier layer, fundamentally ensuring the protective effect and effectively preventing groundwater infiltration and pollutant migration. It possesses scene-adaptive adjustment capabilities, allowing for flexible adjustment of the working width, mixing depth, and grout injection position based on the actual width and length of the target foundation pit. This greatly enhances equipment versatility, eliminating the need for frequent equipment replacements or adjustments to construction plans, and adapting to diverse foundation pit protection needs. The combination of synchronous operation mode and adaptive adjustment simplifies the construction process, shortens the construction cycle, reduces manpower and equipment input, significantly lowers construction costs, and improves construction efficiency, facilitating rapid project progress. The multi-layer barrier grout injection mechanism, combined with precise mixing and stirring functions, forms a structurally stable composite barrier layer with excellent protective performance. Its protective reliability far exceeds that of barrier layers prepared by traditional equipment, better meeting the stringent standards of environmental geological remediation projects. While improving construction quality and efficiency, it reduces construction difficulty and workload, providing an efficient and reliable technical solution for environmental geological remediation projects, demonstrating significant engineering application value. Attached Figure Description

[0017] Figure 1 This is a first isometric view of a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0018] Figure 2 This is a second isometric view of a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0019] Figure 3 This is a schematic diagram of the installation of an L-shaped plate in a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0020] Figure 4This is a cross-sectional view of an L-shaped plate of a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0021] Figure 5 This is a schematic diagram of the main shaft installation of a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0022] Figure 6 This is a schematic diagram of the pendulum installation of a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0023] Figure 7 This is a schematic diagram of the installation of a disc cam in a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0024] Figure 8 This is a schematic diagram of the installation of the first sliding pin in a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0025] Figure 9 This is a schematic diagram of the installation of a U-shaped seat for a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0026] Figure 10 This is a schematic diagram of the rectangular frame installation of a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0027] Figure 11 This is a schematic diagram of the top mounting of a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0028] Figure 12 This is a truss cross-sectional view of a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0029] Figure 13 This is a schematic diagram of the top box installation for a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0030] Figure 14 This is a cross-sectional view of the top box of a multi-layer barrier grout injection system for environmental geological remediation of contaminated sites according to the present invention.

[0031] Figure 15 This is a schematic diagram of the reversing disk structure of a multi-layer barrier slurry injection system for environmental geological remediation of contaminated sites according to the present invention.

[0032] Numbering in the diagram: 1-Lifting seat, 2-Truss, 3-Double threaded rod, 4-First handle, 5-L-shaped plate, 6-First motor, 7-First threaded rod, 8-Threaded cylinder, 9-Motor base, 10-Main motor, 11-Drive disc, 12-Drive pin, 13-Swing rod, 14-Long keyway, 15-Secondary connecting rod, 16-Connecting rod, 17-Connecting pin, 18-Drive plate, 19-Grouting nozzle, 20-Square slider, 21-Sector gear, 22-Double-sided rack, 23-First spur gear, 24-Disc cam, 25-Irregular groove, 26-First sliding pin, 27-Inner plate, 28-Top plate, 29-Inner slider, 30-Second motor, 31-Inner shaft, 32-Mixing shaft, 33-Mixing frame, 34-U-shaped seat, 35-Inner sleeve seat, 36-Second sliding pin, 37-Track plate, 3 8-Wave groove, 39-Main shaft, 40-First bevel gear, 41-Second bevel gear, 42-U-shaped bearing seat, 43-First connecting shaft, 44-Second connecting shaft, 45-Sleeve, 46-Steering spur gear, 47-Sleeve shaft, 48-Moving spur gear, 49-Top seat, 50-Rectangular frame, 51-Mounting box, 52-Sector-shaped locking pin, 53-Spring, 54-Sector-shaped locking groove, 55-Reversing baffle, 56-First stop pin, 57-Second stop pin, 58-Top box, 59-First pull pin, 60-Tension spring, 61-Second pull pin, 62-Reversing rod, 63-Reversing disc, 64-Small radius groove, 65-Variable diameter groove, 66-Large radius groove, 67-Annular seat, 68-Guide rod, 69-Third sliding pin, 70-Lower rack, 71-Upper rack, 72-Stop post, 73-U-shaped sliding plate. Detailed Implementation

[0033] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figures 1-15 As shown, this invention provides a multi-layer barrier grout injection system for contaminated sites in environmental geological remediation, including a truss 2. Lifting seats 1 are provided on both sides of the lower end of the truss 2. A top seat 49 is provided at the lower end of the truss 2. An L-shaped plate 5 is provided on the inner wall of the top seat 49. A main shaft 39, capable of rotation and vertical movement, is provided on the inner wall of the L-shaped plate 5. A drive plate 18 is provided at the lower end of the L-shaped plate 5. A grouting nozzle 19 is provided on the inner wall of the drive plate 18. A rotatable mixing frame 33 is provided at the lower end of the drive plate 18. When the main shaft 39 rotates, the L-shaped plate 5 can reciprocate forward and backward, and the grouting nozzle 19 and the mixing frame 33 can reciprocate left and right. When the main shaft 39 moves up and down, the stroke of the grouting nozzle 19 and the mixing frame 33 can be changed. A reversing mechanism is provided inside the truss 2. The reversing mechanism includes two movable reversing baffles 55. When the reversing baffles 55 move, the stroke of the L-shaped plate 5 can be changed.

[0035] like Figures 1-8As shown, the truss 2 is used to install and support the L-shaped plate 5 and its corresponding components. The lifting seat 1 provides support for the truss 2 and has a lifting function, allowing adjustment of the height of components such as the truss 2, top seat 49, L-shaped plate 5, and mixing frame 33. The injection system also includes a pump for delivering barrier slurry. The pump's output is connected to the grouting nozzle 19. When the pump operates, it delivers barrier slurry, which is sprayed downwards from the grouting nozzle 19. The lifting seat 1 and pump are existing technologies and will not be described further. Through the L-shaped plate 5, main shaft 39, drive plate 18, grouting nozzle 19, and mixing frame 33, when the main shaft 39 rotates... The system enables the L-shaped plate 5, grouting nozzle 19, and mixing frame 33 to reciprocate back and forth at the lower end of the truss 2, and also drives the grouting nozzle 19 and mixing frame 33 to reciprocate left and right. This allows the grouting nozzle 19 and mixing frame 33 to simultaneously reciprocate back and forth and reciprocate left and right, uniformly injecting barrier grout over a large area at the bottom of the foundation pit. Furthermore, during the rotation and movement of the mixing frame 33 after injection, the barrier grout and in-situ soil are thoroughly mixed, forming a continuous and dense protective barrier. When the main shaft 39 moves up and down, it can change the stroke of the reciprocating left and right swing of the grouting nozzle 19 and mixing frame 33, adapting to the width of the foundation pit. This is achieved through a reversing mechanism, i.e., two... A movable reversing baffle 55, when moving, can change the stroke of the L-shaped plate 5, allowing for adaptive adjustments based on the length of the foundation pit. This enables simultaneous grout injection and soil mixing, allowing the grout to mix efficiently with the in-situ soil immediately after injection. This completely solves the problems of uneven mixing and grout accumulation in existing equipment, significantly improving the uniformity and density of the barrier layer, fundamentally ensuring the protective effect, and effectively preventing groundwater infiltration and pollutant migration. It also possesses scene adaptability, flexibly adjusting the working width, mixing depth, and grout injection position according to the actual width and length of the target foundation pit, greatly improving equipment versatility and eliminating the need for frequent equipment replacements. The construction plan was adjusted to meet diverse foundation pit protection needs; the combination of synchronous operation mode and adaptive adjustment simplified the construction process, shortened the construction cycle, reduced manpower and equipment input, significantly reduced construction costs, and improved construction efficiency, thus facilitating rapid project progress; the multi-layer barrier grout injection mechanism, combined with precise mixing and stirring function, can form a composite barrier layer with stable structure and excellent protective performance. Its protective reliability far exceeds that of barrier layers prepared by traditional equipment, and it can better meet the stringent standards of environmental geological remediation projects; while improving construction quality and efficiency, it reduces construction difficulty and workload, providing an efficient and reliable technical solution for environmental geological remediation projects, and has significant engineering application value.

[0036] The rear end surface of the L-shaped plate 5 is slidably connected to a motor base 9, and a main motor 10 is fixedly connected to the motor base 9. The main shaft 39 is fixedly connected to the output end of the main motor 10. The rear end of the L-shaped plate 5 is also provided with a first threaded rod 7 that can rotate. A threaded cylinder 8 that is fixedly connected to the motor base 9 is threadedly connected to the outer surface of the first threaded rod 7.

[0037] like Figures 4-5 As shown, the motor base 9 can slide vertically on one side of the L-shaped plate 5, thus limiting the main motor 10 and main shaft 39 to only move vertically on one side of the L-shaped plate 5. The function of the main motor 10 is to provide rotational power to the main shaft 39. The main motor 10 is existing technology and will not be described in detail. Bearing seats are rotatably connected to both the upper and lower ends of the outer surface of the first threaded rod 7. The bottom ends of the bearing seats are fixed to one side of the L-shaped plate 5, limiting the first threaded rod 7 to only rotate. The lower bearing seat also houses the first motor 6. The first threaded rod 7 is fixed to the output end of the first motor 6. The function of the machine 6 is to provide rotational power for the first threaded rod 7. When the first threaded rod 7 rotates, it can drive the threaded cylinder 8, motor base 9, main motor 10, main shaft 39, etc. to move upward or downward under the threaded connection with the threaded cylinder 8, thereby adjusting the reciprocating left and right swing stroke of the grouting nozzle 19 and the mixing frame 33. Furthermore, it has a self-locking function under the threaded connection between the first threaded rod 7 and the threaded cylinder 8, that is, when the first threaded rod 7 does not rotate, the positions of the threaded cylinder 8, motor base 9, main motor 10, and main shaft 39 are fixed and will not move up or down.

[0038] A drive disk 11 is provided on one end face of the main shaft 39. A drive pin 12 is fixedly connected to the non-center part of the front surface of the drive disk 11. A rocker arm 13 is hinged to the front surface of the L-shaped plate 5. A long keyway 14 that cooperates with the drive pin 12 is opened on the inner wall of the rocker arm 13. Two auxiliary connecting rods 15 that are parallel to the rocker arm 13 and of equal length are also hinged to both sides of the front surface of the L-shaped plate 5. A connecting rod 16 is hinged to the lower end of the two auxiliary connecting rods 15. A connecting pin 17 is fixedly connected to the inner wall of the middle part of the connecting rod 16. The lower end of the rocker arm 13 is rotatably connected to the outer surface of the connecting pin 17. A drive plate 18 is fixedly connected to the front surface of the connecting pin 17. A grouting nozzle 19 is fixedly connected to the inner wall of the drive plate 18.

[0039] like Figures 4-6As shown, the upper ends of the swing arm 13 and the secondary connecting rod 15 are both hinged to the front surface of the L-shaped plate 5, meaning that the swing arm 13 and the secondary connecting rod 15 can swing left and right. The drive disk 11 is fixed to the front surface of the main shaft 39. When the main shaft 39 rotates, it can cause the drive disk 11 to rotate. When the drive disk 11 rotates, it can cause the drive pin 12 to rotate circumferentially. When the drive pin 12 rotates circumferentially, it can cause the swing arm 13 to swing back and forth left and right through meshing with the long keyway 14. The connecting pin 17 passes through the swing arm 13 and is rotatably connected to the inner wall of the lower end of the swing arm 13. The swing arm 13, the secondary connecting rod 15, and the connecting rod 16 indirectly form a parallelogram mechanism. That is, when the swing arm 13 swings, it can cause the connecting rod 16 to swing back and forth under the limitation of the secondary connecting rod 15. Rod 16, connecting pin 17, drive plate 18, and grouting nozzle 19 always maintain a horizontal reciprocating left-right swing, that is, the nozzle of grouting nozzle 19 always faces downward when it swings left-right. When the main shaft 39, drive disc 11, and drive pin 12 move upward or downward, they can change the initial position of engagement with the long keyway 14. That is, when the main shaft 39 and drive pin 12 move upward, the amplitude of the reciprocating left-right swing of the swing rod 13 increases, and the stroke of the reciprocating left-right swing of the drive plate 18 and grouting nozzle 19 increases. Similarly, when the main shaft 39 and drive pin 12 move downward, the stroke of the reciprocating left-right swing of the drive plate 18 and grouting nozzle 19 decreases, thereby making adaptive adjustments according to the width of the foundation pit.

[0040] The upper end of the swing arm 13 is provided with a sector gear 21. The inner wall of the upper end of the L-shaped plate 5 is slidably connected with a double-sided rack 22 that meshes with the sector gear 21. The inner wall of the upper end of the L-shaped plate 5 is also rotatably connected with a first spur gear 23 that meshes with the double-sided rack 22. The inner wall of the upper end of the L-shaped plate 5 is also slidably connected with an inner plate 27. A top plate 28 is fixedly connected to the front surface of the inner plate 27. The stirring rack 33 is installed at the lower end of the top plate 28. The lower end of the inner plate 27 is provided with a first sliding pin 26. The upper end of the first spur gear 23 is coaxially fixed with a disc cam 24 that cooperates with the first sliding pin 26.

[0041] like Figures 5-9 As shown, the first sliding pin 26 is fixed to the lower end of the inner plate 27. The inner plate 27 and the first sliding pin 26 are slidably connected to the inner wall of the upper end of the L-shaped plate 5. The double-sided rack 22 is slidably connected to the inner wall of the L-shaped plate 5. A rotating shaft is fixed to the inner wall of the first spur gear 23 and the disc cam 24. The rotating shaft is rotatably connected to the inner wall of the L-shaped plate 5. The sector gear 21 is fixed to the upper end of the rocker arm 13. When the rocker arm 13 swings, it can drive the sector gear 21 to rotate. When the sector gear 21 rotates, it can drive the double-sided rack 22 to move left and right through meshing with it. When the double-sided rack 22 moves left and right, it can drive the first spur gear 23 and the disc cam 24 to rotate through meshing with it. Figure 7As shown, the upper end of the disc cam 24 is provided with an irregular groove 25 that meshes with the first sliding pin 26. When the disc cam 24 rotates, the first sliding pin 26, the inner plate 27, the top plate 28, the stirring frame 33 and other components can be driven to oscillate and move back and forth through the meshing of the irregular groove 25 with the first sliding pin 26. When the stirring frame 33 rotates and oscillates and moves back and forth, the stirring effect can be improved and the air bubbles in the slurry can be discharged.

[0042] The inner wall of the top plate 28 is slidably connected to an inner slider 29. The inner wall of the inner slider 29 is provided with a second motor 30. The output end of the second motor 30 is fixedly connected to an inner shaft 31. The lower end of the outer surface of the inner shaft 31 is slidably connected to a stirring shaft 32. The stirring frame 33 is fixedly connected to the lower end of the outer surface of the stirring shaft 32. A square slider 20 that is slidably connected to the drive plate 18 is sleeved in the middle of the outer surface of the stirring shaft 32.

[0043] like Figures 6-9 As shown, the inner slider 29 can slide left and right on the inner wall of the top plate 28. The function of the second motor 30 is to provide rotational power for the inner shaft 31, the stirring shaft 32, and the stirring frame 33. The motor is existing technology and will not be described in detail. The stirring shaft 32 and the inner shaft 31 are connected by a spline, that is, the stirring shaft 32 is slidably connected to the lower end of the outer surface of the inner shaft 31, and when the inner shaft 31 rotates, it can drive the stirring shaft 32 and the stirring frame 33 to rotate synchronously. The stirring shaft 32 passes through the square slider 20, that is, it can slide up and down and rotate on the inner wall of the square slider 20. When the square slider 20 moves back and forth on the inner wall of the drive plate 18, it will not interact with the drive plate 18 when the first sliding pin 26, inner plate 27, top plate 28, stirring shaft 32, stirring frame 33, and square slider 20 move back and forth. When the drive plate 18 swings left and right, it can drive the square slider 20 to swing left and right. When the square slider 20 swings left and right, it can drive the stirring shaft 32, stirring frame 33, inner shaft 31, and inner slider 29 to move left and right, so that the stirring frame 33 and the grouting nozzle 19 can swing left and right in sync.

[0044] The top plate 28 is provided with track plates 37 on both sides of its lower end. A U-shaped seat 34 is slidably connected to the lower surface of the top plate 28. An inner sleeve 35 that is rotatably connected to the stirring shaft 32 is slidably connected to the inner wall of the U-shaped seat 34. A second sliding pin 36 is fixedly connected to both the front and rear surfaces of the inner sleeve 35. A wave groove 38 that cooperates with the second sliding pin 36 is opened on the inner wall of the track plate 37.

[0045] like Figures 8-9As shown, the track plate 37 is fixed to the front and rear sides of the lower surface of the top plate 28. The U-shaped seat 34 is slidably connected to the lower surface of the top plate 28. The inner sleeve 35 is rotatably connected to the upper surface of the outer surface of the stirring shaft 32 and is slidably connected to the inner wall of the U-shaped seat 34. That is, when the second sliding pin 36 and the inner sleeve 35 move up and down, they can drive the stirring shaft 32 to move up and down. When the square slider 20 and the stirring shaft 32 move left and right, they can drive the inner sleeve 35, the U-shaped seat 34, the second sliding pin 36, etc. to move left and right. When the second sliding pin 36 moves left and right, it can oscillate up and down by meshing with the wave groove 38. That is, the inner sleeve 35, the stirring shaft 32, the stirring frame 33, etc. can oscillate up and down. That is, the stirring frame 33 can rotate and move left and right, oscillate up and down, and oscillate back and forth. When oscillating, it can not only improve the stirring effect, but also accelerate the discharge of air bubbles in the slurry.

[0046] The top seat 49 is slidably connected to the lower surface of the truss 2. A sleeve 45 is rotatably connected to the inner wall of the top seat 49. A steering spur gear 46 is fixedly connected to the middle of the outer surface of the sleeve 45. An L-shaped plate 5 is fixedly connected to the lower end of the outer surface of the sleeve 45. A rectangular frame 50 that can move back and forth is provided at the lower end of the top seat 49. A spur rack that meshes with the steering spur gear 46 is provided on the inner wall of the rectangular frame 50. A locking mechanism that cooperates with the rectangular frame 50 is also provided at the lower end of the top seat 49.

[0047] like Figures 10-11 As shown, the top seat 49 is slidably connected to the inner wall of the truss 2, and the sleeve 45 is rotatably connected to the inner wall of the top seat 49, which is equivalent to the steering spur gear 46 and the L-shaped plate 5 being rotatably connected to the lower end of the top seat 49; the rectangular frame 50 is slidably connected to the inner wall of the top seat 49 and can move back and forth on the lower surface of the top seat 49. When the rectangular frame 50 moves forward or backward, under the meshing of the rack and the steering spur gear 46, it can drive the steering spur gear 46, the sleeve 45, the L-shaped plate 5, etc. to rotate. When the L-shaped plate 5 rotates and moves, it can change the position of the grouting nozzle 19 and the mixing frame 33, that is, when the L-shaped plate 5, the grouting nozzle 19, the mixing frame 33, etc. move from front to back, at this time... The grouting nozzle 19 is located at the rear end of the mixing frame 33. That is, after the grouting nozzle 19 sprays out the barrier grout, the mixing frame 33 can promptly mix and stir the sprayed barrier grout. When the L-shaped plate 5, the grouting nozzle 19, and the mixing frame 33 move from back to front, the grouting nozzle 19 is at the front end of the mixing frame 33. That is, after the grouting nozzle 19 sprays out the barrier grout, the mixing frame 33 can promptly mix and stir the sprayed barrier grout. The locking mechanism can lock the rectangular frame 50. That is, when the rectangular frame 50 is at the frontmost or rearmost position, the locking mechanism can lock the rectangular frame 50 to prevent the rectangular frame 50 from moving and the L-shaped plate 5 from rotating.

[0048] The locking mechanism includes a mounting box 51, with a sector-shaped locking pin 52 slidably connected to the inner wall of the mounting box 51. The mounting box 51 also has a spring 53 that cooperates with the sector-shaped locking pin 52. The rectangular frame 50 has two sector-shaped locking grooves 54 that cooperate with the sector-shaped locking pin 52. The lower side of the inner end face of the two reversing baffles 55 is fixedly connected with a second stop pin 57 that cooperates with the rectangular frame 50.

[0049] like Figures 10-13 As shown, the mounting box 51 is fixed to one side of the lower surface of the top seat 49. The sector-shaped locking pin 52 can slide left and right on the inner wall of the mounting box 51. One end of the spring 53 is fixed to the inner wall of the bottom end of the mounting box 51, and the other end of the spring 53 is fixed to the sector-shaped locking pin 52. The spring 53 always exerts a right driving force on the sector-shaped locking pin 52, so that the sector-shaped locking pin 52 is in the extended position at the top under normal conditions. Figure 10 As shown, the rectangular frame 50 can be locked in place by the engagement of the sector-shaped locking pin 52 and the sector-shaped locking groove 54, ensuring that the L-shaped plate 5, grouting nozzle 19, and mixing frame 33 are in a stable state, i.e., the L-shaped plate 5, grouting nozzle 19, and mixing frame 33 can operate stably; Figure 12 and Figure 13As shown, when the top seat 49, rectangular frame 50, and L-shaped plate 5 move from front to back, the grouting nozzle 19 is at the rear end of the mixing frame 33, allowing it to spray out the blocking grout before mixing. When the top seat 49, rectangular frame 50, and L-shaped plate 5 move backward to the designated position, that is, when the rectangular frame 50 moves backward and contacts the second stop pin 57, the rectangular frame 50 stops moving backward due to the obstruction of the second stop pin 57. The corresponding top seat 49, L-shaped plate 5, and turning head... As gear 46, mounting box 51, and sector locking pin 52 continue to move backward, sector locking pin 52 can slide with sector locking groove 54, that is, sector locking pin 52 moves inward to compress spring 53 and disengages from sector locking groove 54. When steering spur gear 46 moves backward, it can rotate and move under the meshing of spur rack, that is, the corresponding grouting nozzle 19 and mixing frame 33 rotate. When the locking pin 52 moves backward to the top position, the sector-shaped locking pin 52 can meet the sector-shaped locking groove 54 at the other end. At this time, the sector-shaped locking pin 52 can pop out again under the elastic force of the spring 53, that is, the sector-shaped locking pin 52 engages with the sector-shaped locking groove 54 at the other end, locking the rectangular frame 50 again. The corresponding L-shaped plate 5, grouting nozzle 19, and mixing frame 33 can rotate 180 degrees. At this time, the grouting nozzle 19 is at the front end of the mixing frame 33. When the top plate 28, L-shaped plate 5, and rotating... When the spur gear 46 and the sector locking pin 52 move forward in the opposite direction after moving to the last position, they can drive the rectangular frame 50 to move forward synchronously. That is, the grouting nozzle 19 and the mixing frame 33 are stabilized again and can operate normally. Through the cooperation of the steering spur gear 46, the rectangular frame 50 and the locking mechanism, the grouting nozzle 19 can always be at the front end of the mixing frame 33. That is, after the blocking grout is sprayed, the mixing frame 33 mixes and stirs the sprayed grout in time.

[0050] The main shaft 39 has a first bevel gear 40 in the middle of its outer surface. The upper end of the first bevel gear 40 is meshed with a second bevel gear 41. The inner wall of the center of the second bevel gear 41 is provided with a telescopic shaft. The telescopic shaft is rotatably connected to the inner wall of the L-shaped plate 5. The upper surface of the top seat 49 is fixedly connected to a top box 58. The inner wall of the top box 58 is provided with a sleeve shaft 47 that is slidably connected to the telescopic shaft. The upper end of the outer surface of the sleeve shaft 47 is fixedly connected to a movable spur gear 48 that can move up and down. The upper and lower sides of the upper surface of the truss 2 are both fixedly connected to an upper rack 71 and a lower rack 70 that cooperate with the movable spur gear 48.

[0051] like Figure 5 , Figures 12-13As shown, the first bevel gear 40 is fixed to the outer surface of the main shaft 39. When the main shaft 39 rotates, it can drive the first bevel gear 40 to rotate. The telescopic shaft includes a first connecting shaft 43 and a second connecting shaft 44. The second bevel gear 41 is fixed to the lower end of the outer surface of the first connecting shaft 43. The second connecting shaft 44 is rotatably connected to the inner wall of the L-shaped plate 5 and rotatably connected to the inner wall of the sleeve 45. The upper end of the second connecting shaft 44 is rotatably connected to the inner wall of the top box 58. The first connecting shaft 43 is slidably connected to the inner wall of the lower end of the second connecting shaft 44. The first connecting shaft 43 and the second connecting shaft 44 are splined, meaning that the first connecting shaft 43 can slide up and down the inner wall of the second connecting shaft 44. When the first connecting shaft 43 rotates, it can drive the second connecting shaft 44 to rotate. A U-shaped bearing seat 42 is rotatably connected to the lower end of the outer surface of the first connecting shaft 43. 2. The bottom end is rotatably connected to the outer surface of the main shaft 39. When the main shaft 39 moves up and down, it can drive the first connecting shaft 43, the second bevel gear 41, etc., to move up and down, ensuring that the first bevel gear 40 and the second bevel gear 41 are always meshed. The top box 58 is used to install components such as the sleeve shaft 47 and the movable spur gear 48. The sleeve shaft 47 can slide up and down and rotate on the inner wall of the top box 58. The sleeve shaft 47 is sleeved on the upper end of the outer surface of the second connecting shaft 44. The sleeve shaft 47 can slide up and down on the outer surface of the second connecting shaft 44, and when the second connecting shaft 44 rotates, it can drive the sleeve shaft 47 and the movable spur gear 48 to rotate. When the main shaft 39 rotates, it can drive the sleeve shaft 47 and the movable spur gear 48 to rotate through the transmission of the first bevel gear 40, the second bevel gear 41, and the telescopic shaft. The installation and shape of the upper rack 71 and the lower rack 70 are as follows. Figure 12 As shown, the upper rack 71 and lower rack 70 are installed in a staggered manner, respectively located on the left and right sides of the movable spur gear 48. When the movable spur gear 48 is at its lowest position and meshes with the lower rack 70, the movable spur gear 48 rotates, driving the top box 58, top seat 49, L-shaped plate 5, grouting nozzle 19, and mixing frame 33 to move backward synchronously. When the movable spur gear 48 moves upward to its highest position, it meshes with the upper rack 71. At this time, the movable spur gear 48 rotates, driving the top box 58, top seat 49, L-shaped plate 5, grouting nozzle 19, and mixing frame 33 to move forward synchronously. That is, with the rotation direction of the movable spur gear 48 unchanged, the direction of movement of the L-shaped plate 5, grouting nozzle 19, and mixing frame 33 can be changed by changing the meshing with the upper rack 71 or lower rack 70 when the movable spur gear 48 moves up and down.

[0052] Both ends of the top box 58 are rotatably connected to reversing rods 62. The inner walls of the upper ends of the reversing rods 62 are rotatably connected to second pull pins 61. Both ends of the top box 58 are slidably connected to U-shaped slide plates 73. The middle of the U-shaped slide plates 73 is rotatably connected to first pull pins 59. A tension spring 60 is provided between the first pull pins 59 and the second pull pins 61. The inner sides of the two reversing rods 62 are coaxially fixed to reversing discs 63. The top box 58 is provided with an annular seat 67 rotatably connected to the sleeve shaft 47. Both sides of the outer surface of the annular seat 67 are fixedly connected to third sliding pins 69. The inner walls of the annular disc are provided with small radius grooves 64, variable diameter grooves 65 and large radius grooves 66 that cooperate with the third sliding pins 69. The inner end face of the reversing baffle 55 is fixedly connected to two first stop pins 56 corresponding to the U-shaped slide plates 73.

[0053] like Figures 13-15 As shown, stop posts 72, which cooperate with the reversing lever 62, are fixedly connected to both the front and rear sides of the left and right ends of the top box 58. This means that when the reversing lever 62 swings forward or backward to contact the stop post 72, it can be blocked and limited. A rotating shaft is fixedly connected to the inner wall of both the reversing lever 62 and the reversing disc 63 at their center, and the rotating shaft is rotatably connected to the inner wall of the top box 58. Figure 15 As shown, two guide rods 68 are fixedly connected to the inner wall of the top box 58. An annular seat 67 is slidably connected to the outer surface of the two guide rods 68, limiting the annular seat 67 to only move up and down. The annular seat 67 is rotatably connected to the sleeve shaft 47. When the annular seat 67 moves up and down, it drives the sleeve shaft 47 and the moving spur gear 48 to move up and down, and the sleeve shaft 47 and the moving spur gear 48 can also rotate. The installation and shape of the U-shaped sliding plate 73, the first pull pin 59, the second pull pin 61, the reversing rod 62, and the tension spring 60 are as follows. Figure 14 As shown, the upper end of the tension spring 60 always exerts a downward pulling force on the second pull pin 61, causing the reversing lever 62 to flip downward in its normal state. When the reversing lever 62 is deflected to its foremost tilted state or its rearmost tilted state, the lower end of the tension spring 60 always exerts an upward and forward or upward and backward pulling force on the first pull pin 59, keeping the U-shaped slide plate 73 in a designated, stable position in its normal state. When the U-shaped slide plate 73 moves from back to front on both sides of the top box 58, it can drive the first pull pin 59 to move forward. When the first pull pin 59 moves forward, it can stretch the tension spring 60. When the first pull pin 59 moves forward to the front end position collinear with the reversing lever 62, the second pull pin 61, reversing lever 62, etc., will swing forward under the tension of the tension spring 60, that is, the reversing lever 62 will deflect forward to the foremost position. Similarly, when the U-shaped slide plate 73 moves from front to back, when the first pull pin 59 moves backward to the rear end position collinear with the reversing lever 62, the reversing lever 62 can swing backward to the top position; the installation and shape of the reversing plate 63, the ring seat 67, the third sliding pin 69, the small radius groove 64, the large radius groove 66, and the variable diameter groove 65 are as follows. Figure 15As shown, when the third sliding pin 69 engages with the small radius groove 64, the third sliding pin 69, the sleeve shaft 47, and the moving spur gear 48 are in their lowest positions, i.e., the moving spur gear 48 engages with the lower rack 70. Furthermore, when the reversing disc 63 is not rotating, the positions of the third sliding pin 69 and the moving spur gear 48 can be locked, ensuring stable engagement between the moving spur gear 48 and the lower rack 70. When the third sliding pin 69 engages with the variable diameter groove 65, when the reversing disc 63 rotates, it can drive the third sliding pin 69, the sleeve shaft 47, and the moving spur gear 48. The movable spur gear 48 moves upward or downward to adjust its position. When the third sliding pin 69 meshes with the large radius groove 66, the third sliding pin 69, the sleeve shaft 47, and the movable spur gear 48 are in their uppermost positions, i.e., the movable spur gear 48 meshes with the upper rack 71. Furthermore, when the reversing disc 63 is not rotating, the positions of the third sliding pin 69 and the movable spur gear 48 are locked, ensuring stable meshing between the movable spur gear 48 and the lower rack 70. The installation and shape of the U-shaped sliding plate 73 and the reversing rod 62 are as follows: Figure 13As shown, when the main motor 10 is working, it can drive the main shaft 39 to rotate, that is, the corresponding moving spur gear 48 rotates, and the grouting nozzle 19 and the mixing frame 33 swing back and forth normally. When the moving spur gear 48 rotates, through meshing with the lower rack 70, it can make the top seat 49, top box 58, rectangular frame 50, U-shaped slide plate 73, L-shaped plate 5, mixing frame 33, grouting nozzle 19, etc., move from front to back. When it moves backward to the designated position, that is, when the rectangular frame 50 contacts the second stop pin 57, the rectangular frame 50 can move forward on the lower surface of the top seat 49. The movement, i.e., the corresponding L-shaped plate 5, grouting nozzle 19, mixing frame 33, etc., can rotate 180 degrees, so that the grouting nozzle 19 is at the front end of the mixing frame 33, which can timely mix and stir the blocking grout sprayed by the grouting nozzle 19. At the same time, the U-shaped slide plate 73 can contact the first stop pin 56, that is, under the obstruction of the first stop pin 56, the U-shaped slide plate 73 can slide from back to front on the left and right end surfaces of the top box 58. After the U-shaped slide plate 73 slides forward to the designated position, it can cause the reversing rod 62 to swing forward, that is, the corresponding reversing disk 63 rotates. When the reversing disc 63 rotates, the third sliding pin 69 slides from the small radius groove 64 into the inner wall of the large radius groove 66, causing the corresponding annular seat 67, moving spur gear 48, etc., to move synchronously upward to the top position. As the moving spur gear 48 moves upward, it disengages from the lower rack 70. After moving to the top position, it engages with the upper rack 71. If the moving spur gear 48 continues to rotate, it will cause the top seat 49, top box 58, U-shaped slide plate 73, rectangular frame 50, L-shaped plate 5, stirring rack 33, etc., to move forward synchronously to the top position. When the U-shaped sliding plate 73 contacts the first stop pin 56 at the front end and the rectangular frame 50 contacts the second stop pin 57 at the front end, the L-shaped plate 5 can rotate 180 degrees again. This allows the mixing frame 33 and the grouting nozzle 19 to rotate 180 degrees, meaning the grouting nozzle 19 is at the rear end of the mixing frame 33. The moving spur gear 48 moves downwards and can re-engage with the lower rack 70, meaning the top box 58, top seat 49, and mixing frame 33 move backwards synchronously. This allows the mixing frame 33 and the grouting nozzle 19 to move back and forth between the two reversing baffles 55. Figure 12As shown, the reversing baffle 55 can slide back and forth on the inner wall of the truss 2. The upper end of the truss 2 is provided with a rotatable bidirectional threaded rod 3. Both ends of the outer surface of the bidirectional threaded rod 3 are rotatably connected to bearing seats. The bottom ends of the bearing seats are fixed to the upper surface of the truss 2, limiting the bidirectional threaded rod 3 to rotate only on the truss 2. Both ends of the bidirectional threaded rod 3 are fixed with a first handle 4. The function of the first handle 4 is to facilitate the rotation of the bidirectional threaded rod 3. A motor can also be used to replace the first handle 4. Two sections of thread are respectively opened at the front and rear ends of the outer surface of the bidirectional threaded rod 3. With threads of the same direction but different rotation, reversing baffles 55 are threadedly connected to the front and rear sides of the outer surface of the bidirectional threaded rod 3, respectively. That is, when the bidirectional threaded rod 3 rotates, it can drive the reversing baffles 55 to move inward or outward, thereby adjusting the distance between the two reversing baffles 55, that is, adjusting the stroke of the top seat 49, top box 58, grouting nozzle 19, mixing frame 33, etc. The threaded connection between the bidirectional threaded rod 3 and the reversing baffles 55 has a self-locking function, that is, when the bidirectional threaded rod 3 does not rotate, the position of the reversing baffles 55 is fixed.

[0054] In use, when the main motor 10 is started to rotate the main shaft 39, the L-shaped plate 5, grouting nozzle 19, and mixing frame 33 can move back and forth at the lower end of the truss 2, and can also drive the grouting nozzle 19 and mixing frame 33 to swing left and right. That is, the corresponding grouting nozzle 19 and mixing frame 33 can move back and forth and swing left and right at the same time, so as to uniformly inject barrier grout over a large area at the bottom of the foundation pit. After injection, when the mixing frame 33 rotates and moves, it can fully mix and stir the barrier grout and the in-situ soil, thereby forming a continuous... A dense protective barrier; when the main shaft 39 moves up and down, it can change the stroke of the grouting nozzle 19 and the mixing frame 33, that is, make adaptive adjustments according to the width of the foundation pit. Through the set reversing mechanism, that is, two movable reversing baffles 55, when the reversing baffles 55 move, it can change the stroke of the L-shaped plate 5, that is, make adaptive adjustments according to the length of the foundation pit; to achieve the synchronous operation of grout injection and soil mixing, the grout can be immediately and efficiently mixed with the in-situ soil after injection, completely solving the problems of existing equipment. The solution addresses issues of uneven mixing and slurry accumulation, significantly improving the uniformity and density of the barrier layer, fundamentally ensuring protective effectiveness and effectively preventing groundwater infiltration and pollutant migration. It possesses scene-adaptive adjustment capabilities, flexibly adjusting the working width, mixing depth, and slurry injection position according to the actual width and length of the target foundation pit, greatly enhancing equipment versatility and eliminating the need for frequent equipment replacements or construction plan adjustments, thus adapting to diverse foundation pit protection needs. The combination of synchronous operation mode and adaptive adjustment simplifies the construction process, shortens the construction cycle, reduces manpower and equipment input, significantly lowers construction costs, and improves construction efficiency, facilitating rapid project progress. The multi-layer barrier slurry injection mechanism, combined with precise mixing and stirring functions, forms a structurally stable composite barrier layer with excellent protective performance. Its protective reliability far exceeds that of barrier layers prepared by traditional equipment, better meeting the stringent standards of environmental geological remediation projects. While improving construction quality and efficiency, it reduces construction difficulty and workload, providing an efficient and reliable technical solution for environmental geological remediation projects, demonstrating significant engineering application value.

Claims

1. A multi-layer barrier grout injection system for contaminated sites in environmental geological remediation, comprising a truss (2), characterized in that: The truss (2) is provided with lifting seats (1) on both sides of its lower end. The truss (2) is provided with a top seat (49) at its lower end. The inner wall of the top seat (49) is provided with an L-shaped plate (5). The inner wall of the L-shaped plate (5) is provided with a main shaft (39) that can rotate and move up and down. The lower end of the L-shaped plate (5) is provided with a drive plate (18). The inner wall of the drive plate (18) is provided with a grouting nozzle (19). The lower end of the drive plate (18) is provided with a rotatable mixing rack (33). When the main shaft (39) rotates... When the L-shaped plate (5) moves back and forth, the grouting nozzle (19) and the mixing frame (33) swing back and forth, and when the main shaft (39) moves up and down, the stroke of the grouting nozzle (19) and the mixing frame (33) swinging back and forth can be changed; the truss (2) is equipped with a reversing mechanism, which includes two movable reversing baffles (55). When the reversing baffles (55) move, the stroke of the L-shaped plate (5) moving back and forth can be changed; The main shaft (39) has a drive disk (11) on one side end face. A drive pin (12) is fixedly connected to the non-center of the front surface of the drive disk (11). A rocker arm (13) is hinged to the front surface of the L-shaped plate (5). A long keyway (14) that cooperates with the drive pin (12) is opened on the inner wall of the rocker arm (13). Two auxiliary connecting rods (15) that are parallel to the rocker arm (13) and of equal length are also hinged to both sides of the front surface of the L-shaped plate (5). A connecting rod (16) is hinged to the lower end of the two auxiliary connecting rods (15). A connecting pin (17) is fixedly connected to the inner wall of the middle part of the connecting rod (16). The lower end of the rocker arm (13) is rotatably connected to the outer surface of the connecting pin (17). A drive plate (18) is fixedly connected to the front surface of the connecting pin (17). The grouting nozzle (19) is fixedly connected to the inner wall of the drive plate (18). The upper end of the swing arm (13) is provided with a sector gear (21), and the inner wall of the upper end of the L-shaped plate (5) is slidably connected with a double-sided rack (22) that meshes with the sector gear (21). The inner wall of the upper end of the L-shaped plate (5) is also rotatably connected with a first spur gear (23) that meshes with the double-sided rack (22). The inner wall of the upper end of the L-shaped plate (5) is also slidably connected with an inner plate (27). The front surface of the inner plate (27) is fixedly connected with a top plate (28). The stirring rack (33) is installed at the lower end of the top plate (28). The lower end of the inner plate (27) is provided with a first sliding pin (26). The upper end of the first spur gear (23) is coaxially fixedly connected with a disc cam (24) that cooperates with the first sliding pin (26). The inner wall of the top plate (28) is slidably connected to an inner slider (29), and the inner wall of the inner slider (29) is provided with a second motor (30). The output end of the second motor (30) is fixedly connected to an inner shaft (31). The lower end of the outer surface of the inner shaft (31) is slidably connected to a stirring shaft (32). The stirring frame (33) is fixedly connected to the lower end of the outer surface of the stirring shaft (32). The middle part of the outer surface of the stirring shaft (32) is fitted with a square slider (20) that is slidably connected to the drive plate (18). The top plate (28) is provided with track plates (37) on both sides of the lower end. A U-shaped seat (34) is slidably connected to the lower surface of the top plate (28). An inner sleeve (35) is slidably connected to the inner wall of the U-shaped seat (34) and rotatably connected to the stirring shaft (32). A second sliding pin (36) is fixedly connected to both the front and rear surfaces of the inner sleeve (35). A wave groove (38) that cooperates with the second sliding pin (36) is opened on the inner wall of the track plate (37).

2. The multi-layer barrier slurry injection system for contaminated sites for environmental geological remediation as described in claim 1, characterized in that: The rear end surface of the L-shaped plate (5) is slidably connected to a motor seat (9), and a main motor (10) is fixedly connected to the motor seat (9). The main shaft (39) is fixedly connected to the output end of the main motor (10). The rear end of the L-shaped plate (5) is also provided with a first threaded rod (7) that can rotate. A threaded cylinder (8) that is fixedly connected to the motor seat (9) is threadedly connected to the outer surface of the first threaded rod (7).

3. The multi-layer barrier grout injection system for contaminated sites for environmental geological remediation as described in claim 1, characterized in that: The top seat (49) is slidably connected to the lower surface of the truss (2). A sleeve (45) is rotatably connected to the inner wall of the top seat (49). A steering spur gear (46) is fixedly connected to the middle of the outer surface of the sleeve (45). An L-shaped plate (5) is fixedly connected to the lower end of the outer surface of the sleeve (45). A rectangular frame (50) that can move back and forth is provided at the lower end of the top seat (49). A spur rack that meshes with the steering spur gear (46) is provided on the inner wall of the rectangular frame (50). A locking mechanism that cooperates with the rectangular frame (50) is also provided at the lower end of the top seat (49).

4. The multi-layer barrier grout injection system for contaminated sites for environmental geological remediation as described in claim 3, characterized in that: The locking mechanism includes a mounting box (51), a fan-shaped locking pin (52) is slidably connected to the inner wall of the mounting box (51), and a spring (53) that cooperates with the fan-shaped locking pin (52) is also provided inside the mounting box (51). Two fan-shaped locking grooves (54) that cooperate with the fan-shaped locking pin (52) are opened on the rectangular frame (50). A second stop pin (57) that cooperates with the rectangular frame (50) is fixedly connected to the lower side of the inner end face of the two reversing baffles (55).

5. The multi-layer barrier grout injection system for contaminated sites for environmental geological remediation as described in claim 1, characterized in that: The main shaft (39) has a first bevel gear (40) in the middle of its outer surface. The upper end of the first bevel gear (40) is meshed with a second bevel gear (41). The inner wall of the center of the second bevel gear (41) is provided with a telescopic shaft. The telescopic shaft is rotatably connected to the inner wall of the L-shaped plate (5). The upper surface of the top seat (49) is fixedly connected with a top box (58). The inner wall of the top box (58) is provided with a sleeve shaft (47) that is slidably connected to the telescopic shaft. The upper end of the outer surface of the sleeve shaft (47) is fixedly connected with a movable spur gear (48) that can move up and down. The upper and lower sides of the upper surface of the truss (2) are fixedly connected with an upper rack (71) and a lower rack (70) that cooperate with the movable spur gear (48).

6. The multi-layer barrier grout injection system for contaminated sites for environmental geological remediation as described in claim 5, characterized in that: The top box (58) is rotatably connected to the left and right ends of the reversing rod (62). The upper inner wall of the reversing rod (62) is rotatably connected to the second pull pin (61). The surfaces of the left and right ends of the top box (58) are slidably connected to the U-shaped slide plate (73). The middle of the U-shaped slide plate (73) is rotatably connected to the first pull pin (59). A tension spring (60) is provided between the first pull pin (59) and the second pull pin (61). The inner sides of the two reversing rods (62) are coaxially fixed to the reversing disk (63). The top box (58) is provided with an annular seat (67) rotatably connected to the sleeve shaft (47). The outer surfaces of the annular seat (67) are fixed to the two sides of the outer surface. The inner wall of the reversing disk is provided with a small radius groove (64), a variable diameter groove (65), and a large radius groove (66) that cooperate with the third slide pin (69). The inner end face of the reversing baffle (55) is fixed with two first stop pins (56) corresponding to the U-shaped slide plate (73).

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