Drill bit for curing agent treatment of high-plasticity clay foundation and use method

Abstract

The invention discloses a drill bit for treating a high-plasticity clay foundation through a curing agent and a using method, the drill bit comprises a drill bit body, a plurality of blade modules are arranged on the drill bit body, and the blade modules are installed on the drill bit body through spring buckle mechanisms; the top of the drill bit body is connected with a hollow pipeline through a transmission connecting rod, an electric steering device is arranged at the connecting position of the drill bit body and the transmission connecting rod, and a high-frequency vibrator is arranged at the connecting position of the hollow pipeline and the transmission connecting rod. A motion sensor and a water content sensor are mounted on the upper surface of the drill bit body; the resistance in the stirring process can be effectively reduced, and the working efficiency of the drill bit in a soil body is improved; the adopted blade is provided with a pressure sensor, the pressure value on the blade can be monitored in real time, the inclination angle of the blade is automatically adjusted according to the pressure change, and therefore the resistance in the stirring process is reduced, and the penetrating capacity and the stirring effect of the drill bit are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction machinery and equipment, and particularly relates to a drill bit for treating highly plastic clay foundation with curing agent and a using method thereof. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Highly plastic clay is a type of clay with relatively high plasticity and low bearing capacity. Generally, it needs to be reinforced to meet the requirements of subgrade strength and stability in engineering. Currently, it is a common method to improve its density by adding a curing agent and performing stirring and curing treatment. However, existing stirring equipment and drill bits have great difficulties in treating highly plastic clay.

[0004] In the prior art, Chinese Utility Model Patent CN209179692U provides a pile foundation drill bit applicable to clay layers. Three wing plates are arranged around the drill pipe, and multiple saw teeth are arranged on the wing plates. By arranging the wing plates, the space between the drill pipe and the wing plates is increased to enable soil residues to pass through and avoid the problem of drill sticking. However, the drill bit with the above structure has the following problems: First, only a mud channel is arranged on the drill bit. When a curing agent needs to be added, an additional curing agent pipeline needs to be set up, which causes the stirring process and the process of adding the curing agent cannot be synchronized, and thus the curing effect of the clay is poor. Second, the saw teeth arranged on the wing plates are prone to sticking clay, and the saw teeth and the wing plates are of an integral structure, so the saw teeth cannot be disassembled from the wing plates during cleaning, and the cleaning process is difficult. Third, the space between the drill pipe and the wing plates may drive the movement of a relatively large volume of clay, and problems such as excessive resistance and uneven stirring often occur. Summary of the Invention

[0005] The purpose of the present invention is to provide a drill bit for treating highly plastic clay foundation with curing agent and a using method thereof, which can realize the simultaneous injection of the curing agent and the stirring process. At the same time, the blade module can be disassembled, which has the advantage of being easy to clean. In addition, the design of the blade structure can effectively reduce the resistance during the stirring process and improve the working efficiency of the drill bit in the soil.

[0006] To achieve the above purpose, the present invention is realized by the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a drill bit for treating highly plastic clay foundation with a curing agent, including a drill bit body, on which a plurality of blade modules are arranged, and the blade modules are installed on the drill bit body through a spring snap mechanism; the top of the drill bit body is connected to a hollow pipe through a transmission connecting rod, and an electric steering device is arranged at the connection position between the drill bit body and the transmission connecting rod, and a high-frequency vibrator is arranged at the connection position between the hollow pipe and the transmission connecting rod; a motion sensor and a moisture content sensor are installed on the upper surface of the drill bit body.

[0008] As a further technical solution, a mud pipe, a curing agent pipe and a water injection pipe are arranged in the hollow pipe. Among them, there are two mud pipes, and the two mud pipes are arranged above, and the curing agent pipe and the water injection pipe are arranged below.

[0009] As a further technical solution, the upper part of the drill bit body is a cylindrical structure, and the lower part is a conical structure, and the blade spring snap mechanism is installed on the cylindrical structure.

[0010] As a further technical solution, a gear disk connecting rod is arranged inside the cylindrical structure of the drill bit body. The upper end of the gear disk connecting rod is connected to the electric steering device, and the lower end of the gear disk connecting rod is connected to the upper surface of the conical structure of the drill bit body through a ball bearing.

[0011] As a further technical solution, a plurality of gear disks are arranged on the gear disk connecting rod from top to bottom. The gear disk meshes with one end of a transmission shaft, and the other end of the transmission shaft is installed with a blade module through a mortise and tenon structure, and a torque sensor is installed at the mortise and tenon structure.

[0012] As a further technical solution, the blade spring snap mechanism includes two limiting devices arranged symmetrically up and down. The limiting devices are located in the grooves on the wall surface of the cylindrical structure and are connected to the bottom surface of the groove through longitudinal springs.

[0013] As a further technical solution, the limiting device includes a rod and a trapezoidal block. One end of the rod is connected to the trapezoidal block, and the other end is connected to the bottom surface of the groove through a longitudinal spring. The two trapezoidal blocks of the two limiting devices clamp the blade module.

[0014] As a further technical solution, the blade module includes a blade and a connecting rod connected to each other. The tail of the blade is arc-shaped, the head of the blade is provided with a triangular spout, and a cuboid tenon is arranged at the end of the connecting rod; a first frustum, an axial spring, a second frustum, a third frustum and a fourth frustum are arranged on the connecting rod in sequence.

[0015] As a further technical solution, the first frustum is connected to one end of the second frustum through an axial spring. The other end of the second frustum is fixedly connected to the third frustum. The first frustum is fixedly connected to the connecting rod. The second frustum is slidably connected to the connecting rod. The fourth frustum is connected to the rectangular tenon. A groove matching the shape of the third frustum is arranged on the fourth frustum.

[0016] In a second aspect, an embodiment of the present invention provides a method for using a drill bit for treating a highly plastic clay foundation with a curing agent, including the following steps:

[0017] S1. Select a drill bit with a suitable size for a test stirring, and observe the values of the moisture content sensor and the motion sensor;

[0018] S2. According to the observed values of the moisture content sensor and the motion sensor, determine the injection rates of water and the curing agent in the curing agent pipeline and the water injection pipeline, and at the same time determine the tilt angle of the blade and the rotation speed of the drill bit;

[0019] S3. Conduct a formal stirring. During the stirring process, appropriately adjust the injection rates of the curing agent and the water volume in the curing agent pipeline and the water injection pipeline, the tilt angle of the blade, and the rotation speed of the drill bit according to the changes in the values of the torque sensor and the motion sensor. According to the value of the moisture content sensor, synchronously adjust the discharge of the excess slurry in the first slurry pipeline and the inflow volume of the second slurry pipeline. When the construction is blocked, the high-frequency vibrator can also be appropriately started until the construction is completed;

[0020] S4. After the construction is completed, stop injecting the curing agent and water into the curing agent pipeline and the water injection pipeline, lift the drill bit upward, and start the high-frequency vibrator to liquefy the clay adhered to the drill bit, which is easy to clean.

[0021] The beneficial effects of the above embodiments of the present invention are as follows:

[0022] 1. For the drill bit for treating a highly plastic clay foundation adopted by the present invention, the tail of the blade is designed in an arc shape, and a triangular nozzle is arranged at the head of the blade, which can effectively reduce the resistance during the stirring process and improve the working efficiency of the drill bit in the soil body; the adopted blade module is equipped with a torque sensor, which can monitor the pressure value on the blade in real time and automatically adjust the tilt angle of the blade according to the pressure change, thereby reducing the resistance during the stirring process and enhancing the penetration ability and stirring effect of the drill bit.

[0023] 2. The drill bit of the present invention is configured with a moisture content sensor, which can monitor the humidity change of the soil in real time and automatically adjust the injection amount of the water injection pipe and the curing agent pipe according to the humidity change, so as to ensure that the usage amount of the curing agent always remains in the optimal range and improve the reinforcement effect; the drill bit can intelligently adjust the tilt angle or the spiral angle of the drill bit according to the pressure value real-time fed back by the pressure sensor in cooperation with the electric steering gear to adapt to different soil environments and ensure the working efficiency and stability of the drill bit under various soil conditions.

[0024] 3. The high-frequency vibrator adopted by the present invention can effectively vibrate and liquefy the clay attached to the drill bit, complete the self-cleaning function, avoid soil accumulation, reduce the blockage problem, thereby improving the mixing efficiency and ensuring the construction quality; when the drill bit penetrates through a harder soil layer, the high-frequency vibrator can reduce the friction between the drill bit and the soil layer through vibration, reduce the resistance, significantly improve the penetration speed of the drill bit, and reduce the construction time.

[0025] 4. The blades adopted by the present invention are designed with replaceable cutters that can be quickly replaced and are connected by a spring snap mechanism. When some parts of the drill bit are worn, the worn cutters can be replaced locally without replacing the entire drill bit, thereby reducing the maintenance cost and increasing the service life; at the same time, when cleaning the blades, the blades can also be disassembled for cleaning, improving the cleaning rate.

[0026] 5. The present invention monitors parameters such as the rotation speed, torque, and pressure of the drill bit in real time through a motion sensor and feeds back through a relevant system to ensure the safety and stability of the drill bit during operation, timely adjust the working state, and prevent failures from occurring.

[0027] 6. The present invention sets up a mud pipeline connected to the outside, and cooperates with a mud pump to recycle the mud to the mud pond for filtration. Then, the moisture content sensor on the drill bit monitors the dryness and humidity of the soil, thereby controlling the delivery of the mud back underground to ensure that the soil humidity is within the optimal range and improve the curing effect; a curing agent pipeline and a water injection pipeline are arranged on the hollow pipeline, which can realize the synchronous mixing, water injection, and injection of the curing agent, improving the mixing effect and curing efficiency of the clay. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0029] Figure 1 is a schematic diagram of the overall structure of the drill bit for treating highly plastic clay foundation with a curing agent of the present invention;

[0030] Figure 2 is a schematic diagram of the inside of the drill bit body of the present invention;

[0031] Figure 3 is a schematic diagram of the blade module and the spring snap head of the present invention;

[0032] Figure 4 is a sectional view of the installation location of the torque sensor of the present invention.

[0033] The schematic diagrams are for illustrative purposes only;

[0034] Among them, 1. First mud pipeline; 2. Second mud pipeline; 3. Curing agent pipeline; 4. Water injection pipeline; 5. Hollow pipeline; 6. High-frequency vibrator; 7. Transmission connecting rod; 8. Electric steering device; 9. Water content sensor; 10. Motion sensor; 11. Blade module; 111. Blade; 112. Connecting rod; 113. Cuboid tenon; 114. First frustum; 115. Axial spring; 116. Second frustum; 117. Third frustum; 118. Fourth frustum; 12. Spring buckle mechanism; 121. Card slot; 122. Limiting device; 123. Rod; 124. Trapezoidal block; 125. Longitudinal spring; 13. Drill bit body; 14. Gear disc connecting rod; 15. Ball bearing for gear disc connecting rod; 16. Gear disc; 17. Force transmission shaft; 18. Ball bearing for force transmission shaft; 19. Torque sensor. Detailed implementation mode

[0035] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0036] Embodiment 1

[0037] In a typical implementation mode of the present invention, as Figures 1-4 shown, a drill bit for treating highly plastic clay foundation with a curing agent is provided, including a drill bit body 13, multiple blade modules 11 are arranged on the drill bit body 13, and the blade modules 11 are installed on the drill bit body 13 through a spring buckle mechanism 12; the top of the drill bit body 13 is connected to a hollow pipeline 5 through a transmission connecting rod 7, an electric steering device 8 is arranged at the connection position between the drill bit body 13 and the transmission connecting rod 7, and a high-frequency vibrator 6 is arranged at the connection position between the hollow pipeline 5 and the transmission connecting rod 7; a motion sensor 10 and a water content sensor 9 are installed on the upper surface of the drill bit body 13.

[0038] In this embodiment, a mud pipeline, a curing agent pipeline 3 and a water injection pipeline 4 are arranged in the hollow pipeline 5, and a plurality of corresponding through holes are arranged on the wall of the hollow pipeline, and each through hole is communicated with the corresponding pipeline. Among them, there are two mud pipelines, including a first mud pipeline 1 and a second mud pipeline 2, and the two mud pipelines are arranged above, and the curing agent pipeline 3 and the water injection pipeline 4 are arranged below.

[0039] Furthermore, the two mud pipelines are symmetrically arranged left and right, and the curing agent pipeline and the water injection pipeline are symmetrically arranged left and right. The mud pipeline is connected to the external pipeline through a rotating joint, and cooperates with a mud pump to recycle the mud to the mud pool for filtration. Then, the moisture sensor on the drill bit monitors the dryness and humidity of the soil, so as to control the conveyance of the mud back underground, ensure that the soil moisture is within the optimal range, and improve the curing effect.

[0040] In this embodiment, the upper part of the drill bit body is a cylindrical structure, and the lower part is a conical structure. The blade spring buckle mechanism 12 is installed on the cylindrical structure. The drill bit and the blade module are connected by a spring buckle mechanism. When some parts of the drill bit are worn, the worn tools can be replaced locally without replacing the entire drill bit, thus reducing the maintenance cost and increasing the service life.

[0041] As Figure 2 and Figure 3 shown, a gear disk link 14 is arranged inside the cylindrical structure of the drill bit body. The upper end of the gear disk link 14 is connected to the electric steering device 8, and the lower end of the gear disk link 14 is connected to the upper surface of the conical structure of the drill bit body through a ball bearing 15 for the gear disk link. A plurality of gear disks 16 are arranged on the gear disk link 14 from top to bottom. The gear disk 16 meshes with one end of a transmission shaft 17. The other end of the transmission shaft 17 is installed with a blade module 11 through a mortise and tenon structure, and a torque sensor 19 is installed at the mortise and tenon structure. Specifically, a rectangular groove is arranged on the end surface of the transmission shaft 17, and the transmission shaft 17 is rotationally connected to the cylindrical structure of the drill bit body through a ball bearing 18 for the transmission shaft.

[0042] The electric steering device 8 in this embodiment adopts an existing structure, similar to a robot joint, which can freely turn flexibly on the XY axis and restrict a certain torsion on the Z axis. In addition, the electric steering device 8 drives the wheel disk link to rotate, and then drives the gear disk on the wheel disk link to rotate. Since the teeth on the gear disk mesh with the teeth on the transmission shaft, the rotation of the gear disk can drive the transmission shaft to rotate. The structure of the gear disk and the electric steering device are existing structures, and those skilled in the art can select the electric steering device 8 according to needs as long as it can achieve the functions to be achieved in this embodiment.

[0043] As Figure 3 shown, the blade spring buckle mechanism 12 includes two limiting devices 122 symmetrically arranged up and down. The limiting devices 122 are located in the grooves on the wall surface of the cylindrical structure and are connected to the bottom surface of the groove through longitudinal springs 125. Further, the limiting device 122 includes a rod 123 and a trapezoidal block 124. One end of the rod 123 is connected to the trapezoidal block 124, and the other end is connected to the bottom surface of the groove through a longitudinal spring 125. The two trapezoidal blocks of the two limiting devices 122 clamp the blade module.

[0044] In this embodiment, the blade module 11 includes a blade 111 and a connecting rod 112 that are connected to each other. A rectangular tenon 113 is provided at the end of the connecting rod 112, and the rectangular tenon 113 is engaged with a rectangular groove on the end face of the force transmission shaft 17. A first frustum 114, an axial spring 115, a second frustum 116, a third frustum 117, and a fourth frustum 118 are sequentially arranged on the connecting rod 112. Further, the first frustum 114 is connected to one end of the second frustum 116 through the axial spring 115, the other end of the second frustum 116 is fixedly connected to the third frustum 117, the first frustum 114 is fixedly connected to the connecting rod 112, the second frustum 116 is slidably connected to the connecting rod 112, the fourth frustum 118 is connected to the rectangular tenon 113, and a groove matching the shape of the third frustum 117 is provided on the fourth frustum 118.

[0045] The usage method of the spring snap mechanism 12 is as follows: When replacing the blade module, first push the blade module inward. The largest diameter part of the second frustum 116 is clamped and fixed by the trapezoidal block 124 of the limiting device 122. Then, pull the blade module outward. At this time, the rectangular tenon 113 connected to the fourth frustum 118 is pulled out from the rectangular groove on the end face of the force transmission shaft 17 and is no longer connected to the force transmission shaft of the gear disk, so the blade angle will no longer be adjusted. After pulling outward to a certain distance, the third frustum 117 is inserted into the groove of the fourth frustum 118. At this time, when pulling the whole outward, the fourth frustum 118 follows the second frustum 116 closely, and the replacement of the blade module is completed. When inserting the blade module 11, perform the above opposite steps, insert the rectangular tenon into the mortise on the right side of the card slot 121 to complete the fixation. At this time, the blade module will change the blade inclination angle with the rotation of the gear disk.

[0046] The working process of the gear disk is as follows: The torque sensor 19 at the mortise-tenon structure reads data and gives it to the control system to adjust the rotation angle of the gear disk connecting rod. The gear disk connecting rod is welded to three gear disks. With the rotation of the gear disk connecting rod, the gear disks rotate accordingly. The gear on the right side of the force transmission shaft is connected to the gear disk, and the three rotate synchronously. The left side of the force transmission shaft is fixed in the ball bearing to reduce friction. The mortise on the left side of the force transmission shaft is connected to the tenon of the spring snap mechanism.

[0047] In this embodiment, multiple blade modules are distributed in a three-layer spiral pattern on the cylindrical surface, with four blades symmetrically distributed in each layer, and the blade modules in adjacent layers are arranged in a staggered manner.

[0048] In this embodiment, the tail of the blade is arc-shaped, and a triangular pointed mouth is provided at the head of the blade, which can effectively reduce the resistance during the stirring process and improve the working efficiency of the drill bit in the soil.

[0049] In this embodiment, the transmission connecting rod 7 is slidably connected to the bottom of the hollow pipe 5, the high-frequency vibrator 6 is fixedly connected to the hollow pipe 5, and the top of the transmission connecting rod 7 is connected to the high-frequency vibrator. The high-frequency vibrator drives the transmission connecting rod 7 to vibrate, and then drives the drill bit body to vibrate. Among them, the high-frequency vibrator can effectively vibrate and liquefy the clay attached to the drill bit, complete the self-cleaning function, avoid soil accumulation, reduce the blockage problem, thereby improving the mixing efficiency, ensuring the construction quality, and the high-frequency vibrator adopts the existing structure; the blade module on the drill bit can intelligently adjust the inclination or spiral angle of the drill bit blade module according to the torque value real-time feedback by the torque sensor, in cooperation with the electric steering gear, so as to adapt to different soil environments and ensure the working efficiency and stability of the drill bit under various soil conditions.

[0050] In this embodiment, two moisture content sensors 9 are provided, and the two moisture content sensors are symmetrically arranged on the upper surface of the drill bit body from left to right. It can monitor the humidity change of the soil in real time and automatically adjust the injection amount of the water injection pipe and the curing agent pipe according to the humidity change, so as to ensure that the usage amount of the curing agent always remains in the optimal range and improve the reinforcement effect.

[0051] In this embodiment, the motion sensor 10 monitors the rotation speed, torque and pressure of the drill bit in real time and provides real-time feedback to optimize the construction parameters.

[0052] As Figure 3 and Figure 4 As shown, the torque sensor 19 is installed at the connection of the mortise of the right side of the rectangular tenon 113 and the mortise of the slot 121, and generates a torque electrical signal by receiving the resistance received by the blade 111 when cutting the soil. Specifically, there are certain grooves on the inner wall of the mortise, and then the torque sensor is embedded in the groove. The holes in the middle of the torque sensor are the same size as the holes in the mortise and are both rectangular. The torque sensor adopted is of the existing structure.

[0053] In this embodiment, the moisture content sensor, the motion sensor and the torque sensor all adopt the existing structure. Those skilled in the art can set them separately according to the measurement needs, and can also adopt a multi-parameter sensor system, which is a sensor system integrating the functions of measuring rotation speed, torque and pressure. These systems usually include multiple sensor modules and realize synchronous measurement through a unified data acquisition unit.

[0054] When specifically used, follow the following usage steps:

[0055] S1. Experimental mixing: Select a drill bit with a suitable size for experimental mixing, and observe the values of the moisture content sensor and the motion sensor;

[0056] S2. Parameter determination: According to the observed values of the moisture content sensor and the motion sensor, determine the injection rates of water and curing agent in the curing agent pipeline and the water injection pipeline, and at the same time determine the inclination angle of the blade and the rotation speed of the drill bit;

[0057] S3. Formal construction: Conduct formal mixing. During the mixing process, appropriately adjust the injection rates of the curing agent and water in the curing agent pipeline and the water injection pipeline, the tilt angle of the blade, and the rotation speed of the drill bit according to the changes in the values of the torque sensor and the motion sensor. Synchronously adjust the discharge of excess slurry from the first slurry pipeline and the inflow volume of the second slurry pipeline according to the value of the moisture content sensor. When construction is blocked, the high-frequency vibrator can also be appropriately started until the construction is completed.

[0058] S4. Drill bit recovery: After the construction is completed, stop injecting the curing agent and water into the curing agent pipeline and the water injection pipeline, lift the drill bit upward, and start the high-frequency vibrator to liquefy the clay adhered to the drill bit, making it easy to clean.

[0059] Embodiment 2

[0060] In a typical implementation manner of this embodiment, a method for using a drill bit for treating highly plastic clay foundation with a curing agent is provided, including the following steps:

[0061] S1. Select a drill bit with an appropriate size for test mixing and observe the values of the moisture content sensor and the motion sensor.

[0062] S2. Determine the injection rates of water and the curing agent in the curing agent pipeline and the water injection pipeline according to the observed values of the moisture content sensor and the motion sensor, and simultaneously determine the tilt angle of the blade and the rotation speed of the drill bit.

[0063] S3. Conduct formal mixing. During the mixing process, appropriately adjust the injection rates of the curing agent and water in the curing agent pipeline and the water injection pipeline, the tilt angle of the blade, and the rotation speed of the drill bit according to the changes in the values of the torque sensor and the motion sensor. Synchronously adjust the discharge of excess slurry from the first slurry pipeline and the inflow volume of the second slurry pipeline according to the value of the moisture content sensor. When construction is blocked, the high-frequency vibrator can also be appropriately started until the construction is completed.

[0064] S4. After the construction is completed, stop injecting the curing agent and water into the curing agent pipeline and the water injection pipeline, lift the drill bit upward, and start the high-frequency vibrator to liquefy the clay adhered to the drill bit, making it easy to clean.

[0065] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drill bit for curing agent treatment of high plasticity clay foundation, characterized in that: It comprises a drill body, on which a plurality of blade modules are arranged, and the blade modules are mounted on the drill body through a spring buckle mechanism; the top of the drill body is connected to a hollow pipe through a transmission connecting rod, an electric steering device is arranged at the connection position between the drill body and the transmission connecting rod, and a high-frequency vibrator is arranged at the connection position between the hollow pipe and the transmission connecting rod; a motion sensor and a water content sensor are mounted on the upper surface of the drill body.

2. The drill bit for curing agent treatment of high plasticity clay foundation according to claim 1, characterized in that: A mud pipe, a curing agent pipe and a water injection pipe are arranged in the hollow pipe, wherein two mud pipes are arranged at the upper part, and the curing agent pipe and the water injection pipe are arranged at the lower part.

3. The drill bit for curing agent treatment of high plasticity clay foundation according to claim 1, characterized in that: The upper part of the drill body is a cylindrical structure, and the lower part is a conical structure. The blade spring buckle mechanism is installed on the cylindrical structure.

4. The drill bit for curing agent treatment of high plasticity clay foundation as claimed in claim 3, characterized in that: A gear plate connecting rod is arranged inside the cylindrical structure of the drill body, the upper end of the gear plate connecting rod is connected to the electric steering device, and the lower end of the gear plate connecting rod is connected to the upper surface of the conical structure of the drill body through a ball bearing.

5. The drill bit for curing agent treatment of high plasticity clay foundation as claimed in claim 4, characterized in that: A plurality of gear plates are arranged on the gear plate connecting rod from top to bottom, and the gear plates are meshed with one end of the force transmission shaft, and a blade module is installed on the other end of the force transmission shaft through a mortise and tenon structure, and a torque sensor is installed at the mortise and tenon structure.

6. The drill bit for curing agent treatment of high plasticity clay foundation as claimed in claim 3, characterized in that: The blade spring buckle mechanism comprises two limit devices which are symmetrically arranged in the upper and lower parts. The limit devices are located in the groove of the wall surface of the cylindrical structure and are connected to the bottom surface of the groove through a longitudinal spring.

7. The drill bit for curing agent treatment of high plasticity clay foundation as claimed in claim 6, characterized in that: The limiting device comprises a rod and a trapezoidal block, one end of the rod is connected to the trapezoidal block, and the other end is connected to the bottom surface of the groove through a longitudinal spring, and the two trapezoidal blocks of the two limiting devices clamp the blade module.

8. The drill bit for curing agent treatment of high plasticity clay foundation according to claim 1, characterized in that: The blade module includes a blade and a connecting rod connected to each other. The tail of the blade is arc-shaped, the head of the blade is provided with a triangular tip, and the end of the connecting rod is provided with a rectangular tenon; the connecting rod is provided with a first frustum, an axial spring, a second frustum, a third frustum and a fourth frustum in sequence.

9. The drill bit for curing agent treatment of high plasticity clay foundation as claimed in claim 8, characterized in that: The first cone is connected to one end of the second cone through an axial spring, the other end of the second cone is fixedly connected to the third cone, the first cone is fixedly connected to the connecting rod, the second cone is slidably connected to the connecting rod, the fourth cone is connected to the rectangular tenon, and a groove matching the shape of the third cone is provided on the fourth cone.

10. A method for using a drill bit for curing a high plasticity clay foundation as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Select a drill bit of appropriate size to conduct experimental stirring and observe the values ​​of the moisture content sensor and motion sensor; S2. Determine the injection rate of water and curing agent in the curing agent pipeline and the water injection pipeline according to the observed values ​​of the moisture content sensor and the motion sensor, and simultaneously determine the inclination angle of the blade and the rotation speed of the drill bit; S3, formal mixing is carried out. During the mixing process, the injection rate of the curing agent and water in the curing agent pipeline and the water injection pipeline, the inclination angle of the blade, and the rotation speed of the drill bit are appropriately adjusted as the values ​​of the torque sensor and the motion sensor change. According to the value of the water content sensor, the discharge of excess mud from the first mud pipeline and the discharge of mud from the second mud pipeline are synchronously adjusted. When the construction is obstructed, the high-frequency vibrator can also be appropriately started until the construction is completed; S4. After the construction is completed, stop adding curing agent and water to the curing agent pipeline and the water injection pipeline, lift the drill bit upward, start the high-frequency vibrator, and liquefy the clay adhering to the drill bit for easy cleaning.

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