Deep automatic stirring and reinforcing device for soft soil foundation and using method of deep automatic stirring and reinforcing device

Abstract

The invention relates to the technical field of constructional engineering, and discloses a soft soil foundation deep automatic stirring and reinforcing device and a using method, and the soft soil foundation deep automatic stirring and reinforcing device comprises a base, a transmission plate, a stirring mechanism, a height adjusting mechanism and an automatic pouring mechanism. Auger blades of the stirring mechanism are distributed on the surface of the connecting rod in a layered manner; the height adjusting mechanism drives a hydraulic rod through a hydraulic pump to realize automatic lifting of the stirring mechanism; and the automatic filling mechanism conveys a curing agent to the stirring barrel through the feeder and the conveying pipe. During use, after the device is placed stably, a curing agent is added, the servo motor drives the auger blades to conduct pre-stirring, the hydraulic mechanism drives the blades to be inserted into a foundation, the lower-end small-spacing blades convey small-particle curing agents to a deep layer to conduct stirring, the upper-end large-spacing blades convey large-particle curing agents to a shallow layer to conduct stirring, and then lifting and resetting are conducted. The device gets rid of dependence of a crane, realizes automatic layered conveying of the curing agent, improves the adaptability of equipment use scenes, protects the mechanism, prolongs the service life of the equipment, and is convenient and efficient to use.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a deep automated mixing and reinforcement device for soft soil foundations and its usage method. Background Technology

[0002] Soft soil, a common fine-grained sedimentary soil found in coastal areas, lacustrine basins, valleys, and riverbanks, is characterized by high natural water content, large natural void ratio, high compressibility, low consolidation coefficient, and long consolidation time. Furthermore, its layered distribution is complex, with significant differences in physical and mechanical properties between layers. In construction engineering, untreated soft soil foundations are prone to settlement and deformation due to insufficient bearing capacity, severely impacting the safety and stability of the engineering structure. Therefore, reinforcing soft soil foundations is a crucial step in engineering construction, and deep mixing is widely used due to its effectiveness in improving the mechanical properties of soft soil.

[0003] However, existing deep mixing reinforcement devices for soft soil foundations have many limitations in practical applications: on the one hand, the devices rely on cranes for movement and lifting operations, and their application scenarios are limited by the crane equipment; on the other hand, the curing agent injection relies on manual pre-addition into the foundation, which not only increases labor costs, but also makes it difficult to achieve precise layered delivery due to the different requirements for the size of the curing agent particles at different foundation depths, resulting in insufficient reinforcement uniformity and an inability to fully adapt to the layered distribution characteristics of soft soil, making it difficult to meet the requirements for high-quality reinforcement. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides a deep automated mixing and reinforcement device and method for soft soil foundations, aiming to improve the problems of the application scenarios of existing deep mixing and reinforcement devices for soft soil foundations being limited by crane equipment, and the insufficient uniformity of reinforcement caused by the difficulty in achieving precise layered delivery through manual pouring.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a deep automated mixing and reinforcement device for soft soil foundations, comprising a base, a transmission plate, a mixing mechanism, a height adjustment mechanism, and an automatic grouting mechanism. The mixing mechanism includes a servo motor, a connecting rod, and auger blades. The servo motor is fixedly connected to the upper end face of the transmission plate, and the output end of the servo motor is rotatably connected to the connecting rod, which penetrates the transmission plate. The auger blades are fixedly connected to the outer side wall of the connecting rod, and the distance between adjacent blades of the upper auger blade is greater than the distance between adjacent blades of the lower auger blade. The height adjustment mechanism includes a hydraulic pump and a hydraulic rod. The hydraulic pump penetrates the transmission plate and is fixedly connected to it. The output end of any hydraulic pump is fixedly connected to a hydraulic rod and penetrates the transmission plate. The lower end face of any hydraulic rod is fixedly connected to the base. The automatic grouting mechanism includes a mixing tank. A support base is fixedly connected to the upper end face of the base, and the mixing tank is fixedly connected to the upper end face of the support base. A conveying pipe is fixedly connected to the material inlet of the mixing tank, and a feeder is fixedly connected to the upper end face of the conveying pipe.

[0006] Preferably, a protector for protecting the connecting rod is fixedly connected to the lower end face of the transmission plate. The protector is fixedly connected to the lower end face of the transmission plate. A connecting groove is formed around the surface of the protector. A shock absorber is fixedly installed inside the connecting groove. A connecting rod is fixedly connected between multiple shock absorbers. The connecting rod passes through the protector.

[0007] Preferably, the connecting groove is a cross-shaped groove with a circular center. The size of the circle is larger than the outer wall size of the connecting rod but smaller than the outer wall size of the auger blade.

[0008] Preferably, a sliding rod and a fixing rod for protecting the conveying pipe are fixedly connected between the lower end face of the conveying pipe and the upper end face of the base. The sliding rod is fixedly connected to the lower end face of the conveying pipe, and the fixing rod is slidably sleeved on the outer side wall of the sliding rod. A shock-absorbing spring is fixedly installed inside the fixing rod, and the upper end face of the shock-absorbing spring is fixedly connected to the sliding rod through a protective pad.

[0009] Preferably, the connecting rod and the auger blades fixedly connected to its surface are located inside the mixing tank, the lower end of the connecting rod penetrates through the mixing tank, and the size of the discharge port at the lower end of the mixing tank is slightly larger than the outer wall size of the auger blades, so that the auger blades can pass through the discharge port and the curing agent will not leak.

[0010] Preferably, the outer side wall of the mixing tank is fixedly connected to the limiting plates on both sides by connecting blocks. A support column is fixedly connected between the lower end face of the limiting plate on one side and the upper end face of the base. Two limiting holes are opened on the surface of the limiting plate on the other side, and the limiting holes are slidably connected to the hydraulic rod.

[0011] Preferably, the surface of the base is provided with a through hole, which is located directly below the auger blade, and the diameter of the through hole is larger than the outer wall size of the auger blade.

[0012] Preferably, the spacing between adjacent auger blades at the lower end of the connecting rod is smaller than the particle size of the large-particle curing agent and larger than the particle size of the small-particle curing agent, and the spacing between adjacent auger blades at the upper end of the connecting rod is larger than the particle size of the large-particle curing agent. The smaller spacing end of the auger blades is used to transport the small-particle curing agent, and the larger spacing end of the auger blades is used to transport the large-particle curing agent.

[0013] Preferably, the length of the wide-spacing end of the auger blades is consistent with the depth of the shallow soft soil layer, which facilitates the delivery of curing agents of different particle sizes.

[0014] A method for using a deep automated mixing and reinforcement device for soft soil foundations includes the following steps:

[0015] S1: Place the device on the soft soil foundation surface to be reinforced, ensuring that the base is in stable contact with the foundation. Adjust the placement position by observing the horizontal status of the base. Check the connection of each component, including the transmission connection between the servo motor and the connecting rod, the oil circuit connection between the hydraulic pump and the hydraulic rod, and the sealing connection between the feed pipe and the feed port of the mixing tank, to ensure that there is no looseness or leakage.

[0016] S2: Add curing agent to the device through the feeder at the top of the conveying pipe. The small-particle curing agent and the large-particle curing agent are added in proportion according to the foundation reinforcement requirements. The curing agent is transported to the mixing tank through the conveying pipe. During the conveying process, the slide bar, the fixed bar and the shock-absorbing spring reduce the impact and wear of the curing agent on the conveying pipe through shock absorption and buffering.

[0017] S3: Start the servo motor. The output of the servo motor drives the connecting rod and the auger blades on the surface to rotate, pre-stirring the curing agent in the mixing tank, so that the curing agent of different sizes is initially mixed to ensure uniform subsequent conveying.

[0018] S4: Start the hydraulic pump. The hydraulic pump drives the hydraulic rod to extend and retract, causing the transmission plate and the connected mixing mechanism to descend vertically. The auger blades are gradually inserted into the foundation through the through holes on the base surface. According to the foundation reinforcement depth requirements, the hydraulic pump controls the extension and retraction of the hydraulic rod to adjust the insertion depth of the mixing mechanism. During the insertion of the auger blades into the foundation, the servo motor keeps running continuously. First, the auger blades at the lower end of the connecting rod enter the deep foundation layer. Through the rotation of the blades, the small particles of solidifying agent in the mixing tank are transported to the deep foundation layer. At the same time, the blades thoroughly mix the deep soil and the small particles of solidifying agent. As the mixing depth increases, the upper auger blades from the center of the connecting rod enter the shallow foundation layer. Through the rotation of the blades, the large particles of solidifying agent are transported to the shallow foundation layer. At the same time, the shallow soil and the large particles of solidifying agent are efficiently mixed.

[0019] S5: After reaching the preset reinforcement depth and completing full-depth mixing, the hydraulic pump drives the hydraulic rod to extend, lifting the mixing mechanism from the foundation until the auger blades are completely detached from the foundation and return to the mixing tank; turn off the servo motor and hydraulic pump, clean the feeder, conveying pipe and residual curing agent in the mixing tank to complete a single reinforcement operation. If reinforcement is required for other areas, repeat steps S1 to S5.

[0020] The present invention has the following beneficial effects:

[0021] 1. In this invention, by integrating a base, transmission plate, mixing mechanism, height adjustment mechanism, and automatic grouting mechanism, the deep reinforcement of soft soil foundations is automated and precise. Only a small mobile forklift or truck-mounted crane is needed to transport the device, eliminating the need for large cranes and improving the applicability of the equipment to various construction scenarios. The hydraulic pump and hydraulic rod of the height adjustment mechanism work together to drive the mixing mechanism to lift and lower autonomously. The automatic grouting mechanism achieves automatic delivery of the curing agent through the coordination of the feeder, conveying pipe, and mixing tank, eliminating the need for manual pre-grouting. The layered spacing design of the auger blades can adapt to the different depths of the foundation and the required size of the curing agent particles, enabling small-particle curing agent to be accurately delivered to the deep layer and large-particle curing agent to be efficiently delivered to the shallow layer, improving the reinforcement effect and the adaptability to the foundation.

[0022] 3. The connecting rod protection mechanism reduces vibration and impact during mixing through protectors and shock absorbers. The material conveying pipe protection mechanism buffers wear during curing agent conveying with the help of sliding rods, fixed rods, and shock-absorbing springs, extending the service life of the equipment. The cooperation of the limit plate, support column, and hydraulic rod provides stable support and guidance for the mixing tank and lifting mechanism, ensuring the stability of the operation process. The through hole in the base provides a reasonable channel for the auger blades to insert into the foundation. With the synergistic effect of all structures, the overall reliability and smooth operation of the device are improved. Attached Figure Description

[0023] Figure 1 This is a perspective view of a deep automated mixing and reinforcement device for soft soil foundation proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the distribution structure of the auger blades in this invention;

[0025] Figure 3 This is a schematic diagram of the connection structure of the motor in this invention;

[0026] Figure 4 This is a schematic diagram of the connection structure of the mixing tank in this invention;

[0027] Figure 5 This is a schematic diagram of the shock absorption structure of the material conveying pipe in this invention;

[0028] Figure 6 This is a schematic diagram of the protective structure for the connecting rod in this invention.

[0029] Legend:

[0030] 1. Base; 2. Transmission plate; 3. Hydraulic pump; 4. Hydraulic rod; 5. Servo motor; 6. Connecting groove; 7. Protector; 8. Connecting rod; 9. Screwdriver blade; 10. Support seat; 11. Mixing tank; 12. Conveying pipe; 13. Feeder; 14. Sliding rod; 15. Fixing rod; 16. Shock-absorbing spring; 17. Protective pad; 18. Conveying port; 19. Connecting block; 20. Limiting plate; 21. Limiting hole; 22. Support column; 23. Shock absorber; 24. Through hole. Detailed Implementation

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Reference Figures 1-6This invention provides an embodiment of an automated mixing and reinforcement device for deep soft soil foundations, comprising a base 1, a transmission plate 2, a mixing mechanism, a height adjustment mechanism, and an automatic grouting mechanism. The mixing mechanism includes a servo motor 5, a connecting rod 8, and auger blades 9. The servo motor 5 is fixedly connected to the upper end face of the transmission plate 2, and the output end of the servo motor 5 is rotatably connected to the connecting rod 8, which passes through the transmission plate 2. The auger blades 9 are fixedly connected to the outer side wall of the connecting rod 8, with the spacing between adjacent blades at the upper end of the auger blade 9 being greater than the spacing between adjacent blades at the lower end, to achieve stepwise delivery of curing agents with different particle sizes. The height adjustment mechanism... The structure includes a hydraulic pump 3 and a hydraulic rod 4. The hydraulic pump 3 passes through the transmission plate 2 and is fixedly connected to the transmission plate 2. The output end of any hydraulic pump 3 is fixedly connected to the hydraulic rod 4 and passes through the transmission plate 2. The lower end face of any hydraulic rod 4 is fixedly connected to the base 1. The automatic filling mechanism includes a mixing tank 11. The upper end face of the base 1 is fixedly connected to a support base 10. The upper end face of the support base 10 is fixedly connected to the mixing tank 11. The feeding port 18 of the mixing tank 11 is fixedly connected to a feeding pipe 12. The upper end face of the feeding pipe 12 is fixedly connected to a feeder 13. The connecting groove 6 is shaped like a cross, with a circular center. The circular shape is larger than the outer wall size of the connecting rod 8 but smaller than the outer wall size of the auger blade 9. The connecting rod 8 and the auger blade 9, which are fixedly connected to its surface, are located inside the mixing tank 11. The lower end of the connecting rod 8 passes through the mixing tank 11. The size of the discharge port at the lower end of the mixing tank 11 is slightly larger than the outer wall size of the auger blade 9, so that the auger blade 9 can pass through the discharge port without the curing agent leaking. Limiting plates 20 are fixedly connected to both sides of the outer wall of the mixing tank 11 by connecting blocks 19. A support column 22 is fixedly connected between the lower end face of one limiting plate 20 and the upper end face of the base 1. Two limiting plates are opened on the surface of the other limiting plate 20. Positioning hole 21, limiting hole 21 is slidably connected to hydraulic rod 4; through hole 24 is opened on the surface of base 1, through hole 24 is located directly below auger blade 9, through hole 24 has a diameter larger than the outer wall size of auger blade 9; the spacing between adjacent auger blades 9 at the lower end of connecting rod 8 is smaller than the particle size of large particle curing agent and larger than the particle size of small particle curing agent, the spacing between adjacent auger blades 9 at the upper end of connecting rod 8 is larger than the particle size of large particle curing agent, the small-spacing end of auger blade 9 is used to transport small particle curing agent, the large-spacing end of auger blade 9 is used to transport large particle curing agent; the length of the large-spacing end of auger blade 9 is consistent with the depth of shallow soft soil layer.

[0033] A protector 7 for protecting the connecting rod 8 is fixedly connected to the lower end face of the transmission plate 2. The protector 7 is fixedly connected to the lower end face of the transmission plate 2. A connecting groove 6 is opened around the surface of the protector 7. A shock absorber 23 is fixedly installed inside the connecting groove 6. A connecting rod 8 is fixedly connected between multiple shock absorbers 23. The connecting rod 8 passes through the protector 7. The connecting groove 6 is shaped like a cross. The center of the cross is circular. The size of the circle is larger than the outer wall size of the connecting rod 8 and smaller than the outer wall size of the auger blade 9.

[0034] A slide rod 14 and a fixing rod 15 for protecting the conveying pipe 12 are fixedly connected between the lower end face of the conveying pipe 12 and the upper end face of the base 1. The slide rod 14 is fixedly connected to the lower end face of the conveying pipe 12. The fixing rod 15 is slidably sleeved on the outer side wall of the slide rod 14. A shock-absorbing spring 16 is fixedly installed inside the fixing rod 15. The upper end face of the shock-absorbing spring 16 is fixedly connected to the slide rod 14 through a protective pad 17.

[0035] The specific implementation method is as follows: Place the device on the surface of the soft soil foundation to be reinforced, ensuring that the base 1 is in stable contact with the foundation. Adjust the placement position by observing the horizontal state of the base 1. Check the connection of each component, including the transmission connection between the servo motor 5 and the connecting rod 8, the oil circuit connection between the hydraulic pump 3 and the hydraulic rod 4, and the sealed connection between the conveying pipe 12 and the conveying port 18 of the mixing tank 11, ensuring that there is no looseness or leakage. Add curing agent to the device through the feeder 13 at the upper end of the conveying pipe 12, wherein the small particle curing agent and the large particle curing agent are added in proportion according to the foundation reinforcement requirements. The curing agent is conveyed through the conveying pipe 1... 2. The material is transported to the mixing tank 11. During the conveying process, the slide bar 14, fixed rod 15, and shock-absorbing spring 16 reduce the impact and wear of the curing agent on the conveying pipe 12 through shock absorption and buffering. The servo motor 5 is started, and the output end of the servo motor 5 drives the connecting rod 8 and the auger blades 9 on the surface to rotate, pre-stirring the curing agent in the mixing tank 11 to initially mix the curing agent of different sizes, ensuring uniform subsequent conveying. The hydraulic pump 3 is started, and the hydraulic pump 3 drives the hydraulic rod 4 to extend and retract, driving the transmission plate 2 and the connected stirring mechanism to descend vertically. The auger blades 9 pass through the through holes 24 on the surface of the base 1 one by one. The mixing mechanism is inserted into the foundation. Based on the required foundation reinforcement depth, the hydraulic pump 3 controls the extension and retraction of the hydraulic rod 4 to adjust the insertion depth. During the insertion of the auger blades 9 into the foundation, the servo motor 5 continues to operate. First, the auger blades 92 at the lower end of the connecting rod 8 enter the deeper layers of the foundation. The rotation of the blades transports the small-particle solidifying agent from the mixing tank 11 to the deeper foundation. Simultaneously, the blades meticulously mix the deep soil with the small-particle solidifying agent. As the mixing depth increases, the upper auger blades 9 at the center of the connecting rod 8 enter the shallower foundation. The rotation of the blades solidifies the larger particles. The agent is delivered to the shallow foundation, and the shallow soil and large-particle solidifying agent are efficiently mixed. When the preset reinforcement depth is reached and the full-depth mixing is completed, the hydraulic pump 3 drives the hydraulic rod 4 to extend, driving the mixing mechanism to lift it from the foundation until the auger blades 9 are completely detached from the foundation and return to the mixing tank 11. The servo motor 5 and hydraulic pump 3 are turned off, and the solidifying agent remaining in the feeder 13, conveying pipe 12 and mixing tank 11 is cleaned. At the same time, the soft mud attached to the auger blades 9 is cleaned, completing a single reinforcement operation. If reinforcement is required in other areas, the above steps can be repeated.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deep automated mixing and reinforcement device for soft soil foundations, comprising a base (1), a transmission plate (2), a mixing mechanism, a height adjustment mechanism, and an automatic grouting mechanism, characterized in that: The stirring mechanism includes a servo motor (5), a connecting rod (8), and an auger blade (9). The servo motor (5) is fixedly connected to the upper end face of the transmission plate (2). The output end of the servo motor (5) is rotatably connected to the connecting rod (8). The connecting rod (8) passes through the transmission plate (2). The auger blade (9) is fixedly connected to the outer side wall of the connecting rod (8). The distance between two adjacent blades of the upper auger blade (9) is greater than the distance between two adjacent blades of the lower auger blade, so as to realize the step-by-step delivery of curing agents with different particle sizes. The height adjustment mechanism includes a hydraulic pump (3) and a hydraulic rod (4). The hydraulic pump (3) passes through the transmission plate (2) and is fixedly connected to the transmission plate (2). The output end of any hydraulic pump (3) is fixedly connected to a hydraulic rod (4) and passes through the transmission plate (2). The lower end face of any hydraulic rod (4) is fixedly connected to the base (1). The automatic filling mechanism includes a mixing tank (11), a support base (10) is fixedly connected to the upper end face of the base (1), the mixing tank (11) is fixedly connected to the upper end face of the support base (10), a feeding pipe (12) is fixedly connected to the feeding port (18) of the mixing tank (11), and a feeder (13) is fixedly connected to the upper end face of the feeding pipe (12).

2. The automated mixing and reinforcement device for deep soft soil foundations according to claim 1, characterized in that: The lower end face of the transmission plate (2) is fixedly connected to a protector (7) for protecting the connecting rod (8). The protector (7) is fixedly connected to the lower end face of the transmission plate (2). A connecting groove (6) is opened around the surface of the protector (7). A shock absorber (23) is fixedly installed inside the connecting groove (6). A connecting rod (8) is fixedly connected between multiple shock absorbers (23). The connecting rod (8) passes through the protector (7).

3. The automated mixing and reinforcement device for deep soft soil foundations according to claim 2, characterized in that: The connecting groove (6) is shaped like a cross, and the center of the cross is circular. The size of the circle is larger than the outer wall size of the connecting rod (8) and smaller than the outer wall size of the auger blade (9).

4. The automated mixing and reinforcement device for deep soft soil foundations according to claim 1, characterized in that: A slide rod (14) and a fixing rod (15) for protecting the conveying pipe (12) are fixedly connected between the lower end face of the conveying pipe (12) and the upper end face of the base (1). The slide rod (14) is fixedly connected to the lower end face of the conveying pipe (12). The fixing rod (15) is slidably sleeved on the outer side wall of the slide rod (14). A shock-absorbing spring (16) is fixedly installed inside the fixing rod (15). The upper end face of the shock-absorbing spring (16) is fixedly connected to the slide rod (14) through a protective pad (17).

5. The automated mixing and reinforcement device for deep soft soil foundations according to claim 1, characterized in that: The connecting rod (8) and the auger blade (9) fixedly connected to its surface are located inside the mixing tank (11). The lower end of the connecting rod (8) passes through the mixing tank (11). The size of the discharge port at the lower end of the mixing tank (11) is slightly larger than the outer wall size of the auger blade (9), so that the auger blade (9) can pass through the discharge port and the curing agent will not leak.

6. The automated mixing and reinforcement device for deep soft soil foundations according to claim 5, characterized in that: The outer side wall of the mixing tank (11) is fixedly connected to the limiting plate (20) by the connecting block (19). A support column (22) is fixedly connected between the lower end face of the limiting plate (20) on one side and the upper end face of the base (1). Two limiting holes (21) are opened on the surface of the limiting plate (20) on the other side. The limiting holes (21) are slidably connected to the hydraulic rod (4).

7. The automated mixing and reinforcement device for deep soft soil foundations according to claim 1, characterized in that: The base (1) has a through hole (24) on its surface. The through hole (24) is located directly below the auger blade (9). The diameter of the through hole (24) is larger than the outer wall size of the auger blade (9).

8. The automated mixing and reinforcement device for deep soft soil foundations according to claim 1, characterized in that: The spacing between adjacent auger blades (9) at the lower end of the connecting rod (8) is smaller than the particle size of the large-particle curing agent and larger than the particle size of the small-particle curing agent. The spacing between adjacent auger blades (9) at the upper end of the connecting rod (8) is larger than the particle size of the large-particle curing agent. The small-spacing end of the auger blades (9) is used to transport small-particle curing agent, and the large-spacing end of the auger blades (9) is used to transport large-particle curing agent.

9. The automated mixing and reinforcement device for deep soft soil foundation according to claim 8, characterized in that: The length of the large-spacing end of the auger blade (9) is consistent with the depth of the shallow soft soil layer.

10. A method of using a deep automated mixing and reinforcement device for soft soil foundations, characterized in that: Includes the following steps: S1: Place the device on the soft soil foundation surface to be reinforced, and ensure that the base (1) is in stable contact with the foundation. Adjust the placement position by observing the horizontal state of the base (1). Check the connection of each component, including the transmission connection between the servo motor (5) and the connecting rod (8), the oil circuit connection between the hydraulic pump (3) and the hydraulic rod (4), and the sealing connection between the conveying pipe (12) and the conveying port (18) of the mixing tank (11), to ensure that there is no looseness or leakage. S2: Add curing agent to the device through the feeder (13) at the upper end of the conveying pipe (12), wherein small particle curing agent and large particle curing agent are added in proportion according to the foundation reinforcement requirements; the curing agent is transported to the mixing tank (11) through the conveying pipe (12). During the conveying process, the slide bar (14), the fixed bar (15) and the shock-absorbing spring (16) reduce the impact and wear of the curing agent on the conveying pipe (12) through shock absorption and buffering; S3: Start the servo motor (5). The output end of the servo motor (5) drives the connecting rod (8) and the auger blades (9) on the surface to rotate, pre-stirring the curing agent in the mixing tank (11) so that the curing agents of different sizes are initially mixed to ensure uniform subsequent conveying. S4: Start the hydraulic pump (3), the hydraulic pump (3) drives the hydraulic rod (4) to extend and retract, and drives the transmission plate (2) and the connected mixing mechanism to descend in the vertical direction; the auger blade (9) is gradually inserted into the foundation through the through hole (24) on the surface of the base (1). According to the foundation reinforcement depth requirements, the hydraulic pump (3) controls the extension and retraction of the hydraulic rod (4) to adjust the insertion depth of the mixing mechanism; during the insertion of the auger blade (9) into the foundation, the servo motor (5) is kept running continuously. First, the auger blade (9) at the lower end of the connecting rod (8) enters the deep foundation layer. Through the rotation of the blade, the small particle solidifier in the mixing tank (11) is transported to the deep foundation layer. At the same time, the blades are finely mixed with the deep soil and the small particle solidifier. As the mixing depth increases, the upper auger blade (9) at the center of the connecting rod (8) enters the shallow foundation layer. Through the rotation of the blade, the large particle solidifier is transported to the shallow foundation layer. At the same time, the shallow soil and the large particle solidifier are efficiently mixed. S5: When the preset reinforcement depth is reached and the full-depth mixing is completed, the hydraulic pump (3) drives the hydraulic rod (4) to extend, driving the mixing mechanism to be lifted from the foundation until the auger blade (9) is completely removed from the foundation and returns to the mixing tank (11); turn off the servo motor (5) and the hydraulic pump (3), clean the feeder (13), the conveying pipe (12) and the residual curing agent in the mixing tank (11) to complete the single reinforcement operation. If reinforcement is required for other areas, repeat steps S1 to S5.

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