Grouting device capable of synchronously reaming and stirring

Abstract

The utility model discloses a grouting device capable of synchronously reaming and stirring, which comprises a hollow drill rod and a main driving device used for driving the drill rod to rotate forwards and backwards, a grouting pipeline is arranged in the drill rod and connected with a slurry supply device, a conical drill bit is arranged at the lower end of the drill rod, and the drill bit is connected with the main driving device. A plurality of first grouting holes which are formed in the radial direction and communicate with the grouting pipeline are formed in the side wall of the drill bit, and a stirring assembly located above the drill bit is arranged on the lower portion of the drill rod. The utility model has the advantages of high integration level, obviously improved operation efficiency, good stirring uniformity and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering and foundation treatment technology, and in particular to a grouting device that can simultaneously expand holes and mix. Background Technology

[0002] In modern infrastructure construction, traditional grouting processes and equipment often face numerous challenges in practical applications, especially when it is necessary to expand the grout's pore size to increase its influence range and simultaneously thoroughly mix it with the in-situ soil to form a uniform, high-strength consolidated body. Existing technologies often have the following shortcomings:

[0003] 1. Issues with operational efficiency and process coordination: Traditional borehole reaming and mixing operations often employ separate drilling tools and mixing mechanisms, or require sequential steps. For example, drilling and reaming are performed first, then the drilling tools are withdrawn, and then a dedicated mixing device is lowered for mixing; or preliminary grouting is performed during drilling, followed by supplementary mixing or secondary grouting. This step-by-step operation mode not only leads to cumbersome construction procedures, increases auxiliary work time, and prolongs the overall construction period, but also may cause problems such as borehole instability and grout loss during process transitions, resulting in low overall construction efficiency.

[0004] 2. Issues with Mixing Uniformity and Adaptability: The uniformity of mixing between the slurry and the soil directly determines the quality and reinforcement effect of the solidified body. Some existing mixing devices have relatively simple blade designs, and their deployment and retraction mechanisms may not be stable or reliable enough, or they may lack effective dynamic control capabilities. When encountering different geological conditions, such as soil layers with uneven hardness or containing a small amount of boulders or hard lumps, fixed mixing parameters or structures may not achieve the ideal mixing effect, easily leading to insufficient mixing of the slurry and soil, "encapsulation" phenomena, or mixing blind zones, ultimately affecting the uniformity and overall strength of the reinforced body.

[0005] 3. Equipment Reliability and Maintenance Issues: Grouting operations typically take place in harsh environments, with equipment operating for extended periods in abrasive media such as mud and sand. Key components of traditional equipment, such as rotary seals and moving parts of the agitator blades, are highly susceptible to jamming, rapid wear, or even damage due to the intrusion of mud and sand if their sealing performance is insufficient or their wear resistance is poor. This not only reduces the equipment's lifespan and increases maintenance costs and downtime but may also cause malfunctions during construction, impacting project progress.

[0006] 4. Insufficient Level of Intelligence and Integration: With the development of engineering technology, the requirements for grouting quality and process control are becoming increasingly stringent. However, many existing devices lack a high level of intelligence, lacking the ability to monitor and intelligently control key parameters such as borehole diameter, stirring torque, grouting pressure, grout flow rate, and drilling depth in real time. Operation mainly relies on experience, making it difficult to achieve precise coordination and optimized control between various processes, and also difficult to dynamically adjust operating parameters based on formation feedback. This limits further improvement in construction quality and adaptability to complex geological conditions.

[0007] In summary, existing grouting devices either focus on applications under specific working conditions (such as grouting behind shield tunnel walls and filling cavities) or have significant shortcomings in the simultaneous and efficient operation of hole enlargement, mixing, and grouting. They are unable to simultaneously meet the multiple demands of improving construction efficiency, ensuring uniform mixing, enhancing geological adaptability, improving equipment reliability, and enhancing intelligent control.

[0008] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a grouting device that can simultaneously expand holes and stir, which has high integration, significantly improved operating efficiency, good stirring uniformity, and strong adaptability.

[0010] This utility model is achieved through the following technical solution:

[0011] To solve the above-mentioned technical problems, this utility model provides a grouting device that can simultaneously expand holes and stir, including a hollow drill rod and a main drive device for driving it to rotate in both directions. The drill rod is provided with a grouting pipe, which is connected to a grout supply device. The lower end of the drill rod is provided with a conical drill bit. The side wall of the drill bit is provided with a plurality of radially arranged first grouting holes that are connected to the grouting pipe. The lower part of the drill rod is provided with a stirring assembly located above the drill bit.

[0012] To further address the technical problems addressed by this utility model, a grouting device capable of simultaneous hole expansion and stirring is provided. The stirring assembly includes a sleeve fitted onto a drill rod and several stirring blades movably connected to the sleeve. A bidirectional overrunning clutch is provided between the sleeve and the drill rod. The upper end of each stirring blade is rotatably connected to the sleeve, and the stirring blade is adapted to swing up and down relative to the sleeve to switch between its unfolded and retracted states. A stirring drive device for driving the stirring blades to unfold and retract is provided between the stirring blades and the sleeve.

[0013] To further address the technical problems addressed by this invention, this invention provides a grouting device capable of simultaneous hole expansion and stirring. The stirring drive includes a linear actuator and a slider slidably connected to a sleeve. At least one connecting rod is rotatably connected to the slider, with the other end of the connecting rod rotatably connected to a stirring blade. One end of the linear actuator is rotatably connected to the sleeve, and the other end is rotatably connected to the connecting rod. A locking mechanism for limiting the slider's sliding is provided between the slider and the sleeve.

[0014] To further solve the technical problem to be solved by this utility model, this utility model provides a grouting device that can simultaneously expand holes and stir. The locking mechanism includes a locking block provided on the sleeve, a locking groove provided on the locking block, and a locking tongue slidably connected to the slider and able to be inserted into the locking groove. A locking driver for driving the locking tongue to extend into the locking groove and an elastic reset member for elastically pressing the locking tongue away from the locking groove are provided between the locking tongue and the slider.

[0015] To further address the technical problems to be solved by this utility model, the grouting device that can simultaneously expand and stir holes provided by this utility model also includes a controller. The lower part of the drill rod is provided with a depth positioning sensor, a drill rod torque sensor, a blade extension angle sensor, and a grouting pressure sensor. The main drive device, grout supply device, linear drive, locking drive, depth positioning sensor, drill rod torque sensor, blade extension angle sensor, and grouting pressure sensor are all electrically connected to and controlled by the controller.

[0016] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a grouting device that can simultaneously expand holes and stir, wherein the stirring blade has several serrated protrusions on its edge.

[0017] In order to further solve the technical problem to be solved by this utility model, the present utility model provides a grouting device that can simultaneously expand holes and stir, wherein the stirring blades are divided into at least two layers along the axial direction of the sleeve, and the stirring blades of each layer are staggered from each other in the circumferential direction of the sleeve.

[0018] To further address the technical problems to be solved by this utility model, this utility model provides a grouting device that can simultaneously expand holes and stir. The side wall of the drill rod is provided with a plurality of second grouting holes at the location of the stirring assembly. The second grouting holes are connected to the grouting pipe and are used to assist grouting during the stirring process.

[0019] In order to further solve the technical problems to be solved by this utility model, this utility model provides a grouting device that can simultaneously expand holes and stir, wherein the side wall of the drill bit is provided with several spiral cutting edges.

[0020] In order to further solve the technical problems to be solved by this utility model, this utility model provides a grouting device that can simultaneously expand holes and stir, wherein the drill bit sidewall is provided with an annular groove, and the first grouting hole is located in the groove.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] This invention features a highly integrated design, employing a unique, extendable and retractable mixing blade assembly with a lockable braking angle, and a dual-point optimized grouting system with injection holes in both the drill bit and the mixing zone. Coupled with an intelligent sensing and control system, it achieves truly simultaneous and efficient operation of the three core processes: borehole expansion, grout injection, and enhanced mixing. This significantly improves construction efficiency and shortens the construction period. The controllable extension, retraction, and locking of the mixing blades enhances adaptability to different geological conditions and ensures mixing stability. The multi-layered, staggered, serrated mixing blades and optimized grouting path ensure uniform and thorough mixing of the grout and soil, thereby improving the quality of the solidified body. Intelligent real-time monitoring and dynamic adjustment enhance operational accuracy and equipment reliability. Attached Figure Description

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0025] Figure 2 It is a three-dimensional structural diagram of the drill bit;

[0026] Figure 3 This is a schematic diagram of the stirring assembly;

[0027] Figure 4 This is a schematic diagram of the locking mechanism;

[0028] Figure 5 This is a schematic diagram of the stirring blade. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Please see Figures 1 to 5This utility model discloses a grouting device that can simultaneously expand and mix holes. Its core design lies in the fact that through a unique set of extendable and retractable mixing blades and a through-type grouting structure, it realizes three key operations of simultaneous drilling expansion (enlargement), grout injection, and enhanced mixing of grout with in-situ soil under a single drilling system, thereby significantly improving the construction efficiency and reinforcement quality of foundation treatment.

[0031] like Figure 1 As shown, the grouting device in this embodiment mainly includes a hollow drill rod 1 and a main drive device 2 (e.g., a motor with a reducer or a hydraulic motor) for driving the drill rod 1 to rotate forward or backward. The hollow internal structure of the drill rod 1 forms the main body of the grouting pipe 11. The upper end (not shown) of the grouting pipe 11 is connected to an external grout supply device (e.g., a grouting pump) through a suitable rotary joint for continuously or intermittently supplying grout of a predetermined formula into the grouting pipe 11.

[0032] A conical drill bit 3 is fixed at the lower end of the drill rod 1. The conical design of the drill bit 3 facilitates guidance and soil breaking during drilling. Several first grouting holes 31 are radially formed on the sidewall of the drill bit 3. These first grouting holes 31 are connected to the grouting pipe 11 inside the drill rod 1, allowing grout to be sprayed from the drill bit 3. Preferably, the arrangement of the first grouting holes 31 is coordinated with the trajectory formed by the rotation of the drill bit 3, ensuring that during drilling, the grout can be uniformly and diffusely sprayed onto the surrounding soil and the soil in front, serving to lubricate and cool the drill bit and pre-wet the soil.

[0033] To further protect the first grouting hole 31 and optimize the grout injection effect, as shown in the figure, an annular groove 33 can be provided on the side wall of the drill bit 3, and the first grouting hole 31 can be opened in the groove 33. This can prevent the first grouting hole 31 from being worn or blocked by direct friction with the soil and rocks during drilling. In addition, to enhance the soil breaking and hole enlargement capabilities of the drill bit 3, several cutting edges 32 distributed along a spiral direction can also be provided on its side wall.

[0034] A mixing assembly 4 is installed at the lower part of the drill rod 1 and above the drill bit 3. This mixing assembly 4 is the core component for achieving efficient mixing of slurry and soil.

[0035] For details, please refer to Figure 3 and Figure 4The stirring assembly 4 includes a sleeve 41 fitted over the drill rod 1, and several stirring blades 42 movably connected to the sleeve 41. A bidirectional overrunning clutch (its internal structure is not specifically shown in the figure, but it is functionally present) is provided between the sleeve 41 and the drill rod 1. This bidirectional overrunning clutch allows the sleeve 41 to rotate synchronously with the drill rod 1 under certain operating conditions (e.g., when the drill rod 1 is rotating forward for drilling), thus achieving the stirring function; while under other operating conditions (e.g., when the stirring blades 42 need to operate independently or to prevent reverse torque transmission), relative rotation or disengagement between the sleeve 41 and the drill rod 1 is allowed.

[0036] The upper end of each stirring blade 42 is rotatably connected to the sleeve 41 via a hinged structure (e.g., a pin), allowing the stirring blade 42 to swing up and down relative to the axis of the sleeve 41, thereby switching between its unfolded and folded states. In the folded state, as... Figure 3 As shown, the stirring blade 42 fits tightly against the outer wall of the drill pipe 1 or the outer wall of the sleeve 41, forming an approximately streamlined profile. This design greatly reduces the resistance during the lowering or drilling process. It is estimated that it can effectively reduce drilling resistance by 50% to 70%, which is particularly beneficial for quickly penetrating hard rock layers or dense soil layers.

[0037] When stirring is required, the stirring blades 42 unfold under the action of the stirring drive device. In the unfolded state, as... Figure 3 As shown, the stirring blade 42 rotates outward around its hinge axis. In this embodiment, 3 to 5 layers of stirring blades 42 can be provided. These stirring blades 42 are arranged in layers along the axial direction of the sleeve 41, and the stirring blades 42 in each layer are staggered at a certain angle in the circumferential direction to form a more complete stirring coverage area and avoid stirring blind spots. The stirred blade 42 after being unfolded forms an inclination angle of 15° to 45° with the plane in its folded state (i.e., the plane parallel to the drill rod axis). This inclination angle design, along with the airfoil structure of the stirring blade 42 itself, can effectively turn over and shear the soil during rotation and fully mix the slurry. At the same time, after the stirring blade 42 is unfolded, its overall working diameter is significantly larger than that in its folded state, for example, it can be increased by 30% to 50%, thereby greatly expanding the effective stirring range of a single operation and fully covering the area around the borehole wall.

[0038] To further enhance the ability to mix and break up soil, the free edge of the mixing blade 42 may be provided with a number of serrated protrusions 421, the height of which is, for example, 2-5 mm. As the mixing blade 42 rotates with the sleeve 41, these serrated protrusions 421 can more effectively cut, tear and break up soil particles, promoting micro-mixing of slurry and soil.

[0039] A stirring drive device for driving the stirring blade 42 to unfold and retract is provided between the stirring blade 42 and the sleeve 41. (Refer to...) Figure 3 The stirring drive device in this embodiment specifically includes: one or more linear actuators 43 (e.g., miniature hydraulic cylinders, electric push rods, or pneumatic cylinders), and one or more sliders 44 slidably connected to the outer peripheral wall of the sleeve 41. Each slider 44 is rotatably connected to at least one connecting rod 45. The other end of the connecting rod 45 is rotatably connected to the middle or lower part of the corresponding stirring blade 42. One end of the linear actuator 43 (e.g., the cylinder end or fixed end) is rotatably connected to the sleeve 41 (e.g., via an ear seat), and its other end (e.g., the piston rod end or movable end) is rotatably connected to a certain position of the connecting rod 45, or directly drives the slider 44. Through the extension and retraction of the linear actuator 43, the connecting rod 45 can be driven to move, thereby causing the slider 44 to slide on the sleeve 41, and pushing or pulling the stirring blade 42 around its upper hinge axis via the connecting rod 45, thus realizing the unfolding and reliable retraction of the stirring blade 42.

[0040] To ensure the stability of the mixing blade 42 after it extends to the predetermined working angle, and to prevent accidental changes in angle or vibration due to soil reaction during mixing, a locking mechanism is provided between the slider 44 and the sleeve 41. When the mixing blade 42 extends to the target tilt angle, the locking mechanism can securely lock the slider 44 (and thus the mixing blade 42) in the current position.

[0041] Reference Figure 4 In this embodiment, the locking mechanism may specifically include: one or more locking blocks 46 fixedly mounted on the sleeve 41, each locking block 46 having one or more locking grooves 461; and one or more locking tongues 47 slidably connected to the slider 44, with their front ends capable of being inserted into the corresponding locking grooves 461. Between the locking tongues 47 and the slider 44, there is also a locking actuator 48 (e.g., a small hydraulic actuator, electromagnetic actuator, or pneumatic actuator) for driving the locking tongues 47 to actively extend into the locking grooves 461 to achieve locking, and an elastic reset member 49 (e.g., a spring) for automatically resetting the locking tongues 47 by elastically pressing them in a direction away from the locking grooves 461 when the locking actuator 48 is released. When the stirring blade 42 is fully extended, the controller issues a command, the locking actuator 48 actuates, and pushes the locking tongues 47 into the locking grooves 461 of the locking blocks 46, achieving mechanical locking.

[0042] To achieve intelligent control and optimize the operation process, this device also includes a central controller (not shown in the figure, typically located on a ground control panel or integrated near the main drive unit 2). Multiple sensors are installed on the lower part of the drill rod 1 (e.g., near the drill bit 3 or the mixing assembly 4), including: a depth positioning sensor (for monitoring drilling depth), a drill rod torque sensor (for monitoring load conditions during drilling and mixing), a blade extension angle sensor (for real-time monitoring of the deployment angle of the mixing blade 42), and a grouting pressure sensor (for monitoring the grout pressure within the grouting pipe 11). All these sensors, along with the main drive unit 2, the grout supply device, the linear actuator 43 for driving the mixing blade, and the locking actuator 48 for locking, are electrically connected to the controller via wired or wireless means and are subject to its unified control.

[0043] Data collected by sensors (such as torque, pressure, angle, depth, etc.) can be transmitted to the controller in real time via a wireless transmission module (if wireless) or a wired signal line. The controller has a pre-set control algorithm that dynamically adjusts the actions of each actuator based on these real-time feedback parameters.

[0044] During the drilling stage (when the mixing blade 42 is in a retracted state): the controller can automatically adjust the rotational speed of the drill rod 1 output by the main drive device 2 (e.g., optimized within the range of 50-200 r / min) and the grouting pressure of the slurry supply device (e.g., controlled within the range of 0.5-2.0 MPa) based on the torque value fed back by the drill rod torque sensor, so as to avoid overload or pump stalling while ensuring drilling efficiency.

[0045] During the mixing stage (at this time, the mixing blade 42 has been extended to the predetermined angle): The controller confirms and instructs the locking mechanism to lock the tilt angle of the mixing blade 42 based on the data from the blade extension angle sensor. At the same time, according to the formation conditions and slurry characteristics, the controller synchronously controls the rotation speed of the drill rod 1 (i.e., the mixing component 4) as well as the slurry supply rate and pressure to achieve the best coordination of soil breaking, slurry injection and full mixing.

[0046] To further enhance the grouting effect during the mixing process and ensure that the grout can act more directly on the mixing area, such as... Figure 3 As shown, several second grouting holes 12 can be opened on the side wall of the drill rod 1 at the axial position where the mixing assembly 4 is located. These second grouting holes 12 are also connected to the grouting pipe 11 inside the drill rod 1. Preferably, these second grouting holes 12 can be designed to spray outward along the tangential direction when the mixing blade 42 rotates or at a slight angle. In this way, when the mixing blade 42 rotates at high speed, the grout sprayed from the second grouting holes 12 can be more forcefully thrown into the soil around the hole wall by the action of centrifugal force, forming a more uniform grout-soil mixing area, improving the utilization rate of the grout and the mixing effect.

[0047] As a preferred improvement, a transition guide channel (not shown separately in the figure) can be provided on the drill rod 1, located between the drill bit 3 and the mixing assembly 4. The outer diameter of the drill rod in the area of ​​this transition guide channel can be designed to be 10%-20% smaller than the maximum diameter of the drill bit 3. This transition guide channel can be connected to or form a favorable flow pattern with the radial grouting holes of the mixing section (i.e., the aforementioned second grouting hole 12). The purpose is to optimize the grout flow path from the grouting pipe 11 to the second grouting hole 12, reduce local resistance (head loss) during grout transport, and make grout injection smoother and more powerful.

[0048] Brief description of the work process:

[0049] 1. Lowering and Drilling: When the device is lowered to the predetermined depth or drilling begins, the controller instructs the stirring drive to fully retract the stirring blades 42, releasing the locking mechanism. The main drive unit 2 drives the drill rod 1 to rotate, and the drill bit 3 performs drilling or reaming operations. Simultaneously, the grout supply device can inject an appropriate amount of grout as needed through the first grouting hole 31 and / or the second grouting hole 12, serving as an auxiliary drilling and lubrication function. The controller adjusts the drilling parameters in real time based on feedback from torque sensors, etc.

[0050] 2. Agitator blade deployment and locking: When the drill bit reaches the predetermined agitation depth or layer, the controller commands the linear actuator 43 to activate, driving the agitator blade 42 to deploy to the set working angle. After the blade extension angle sensor confirms that it is in place, the controller commands the locking actuator 48 to activate, and the locking tongue 47 inserts into the locking groove 461, locking the agitator blade 42 in the deployed state.

[0051] 3. Mixing and Grouting: The main drive unit 2 drives the drill rod 1 (and the synchronously rotating sleeve 41 and mixing blade 42) to perform mixing operations at a set speed. Simultaneously, the grout supply device injects grout into the mixing area through the first grouting hole 31 and / or the second grouting hole 12 at a set pressure and flow rate. The mixing blade 42 and its serrated protrusions 421 powerfully cut, agitate, and mix the soil, ensuring the grout and soil are fully and uniformly combined. The controller continuously monitors and adjusts the operating status based on parameters such as grouting pressure and torque.

[0052] 4. Agitator Blade Folding and Drill Pipe Lifting / Relocation: After completing the grouting of one section, the controller commands the locking driver 48 to unlock, and the elastic reset element 49 resets the locking tongue 47. Then, the linear driver 43 is commanded to reverse, folding the agitator blade 42 back to the side wall of the drill rod 1. Afterwards, the drill can be lifted, or the drill can be moved to the next grouting point to repeat the above process.

[0053] This utility model, through the above-mentioned structural design, highly integrates the functions of hole expansion, mixing, and grouting into one unit. The mixing blades can be controlled to extend and retract to adapt to different working conditions. Combined with the intelligent control system, it can effectively improve construction efficiency, ensure the quality of grout mixing, and enhance adaptability to complex strata. It has significant practical value and promotion prospects.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grouting device capable of simultaneous hole expansion and stirring, characterized in that: The device includes a hollow drill rod (1) and a main drive device (2) for driving its forward and reverse rotation. The drill rod (1) is provided with a grouting pipe (11) and the grouting pipe (11) is connected to a grout supply device. The lower end of the drill rod (1) is provided with a tapered drill bit (3). The side wall of the drill bit (3) is provided with a plurality of radially arranged first grouting holes (31) that are connected to the grouting pipe (11). The lower part of the drill rod (1) is provided with a stirring assembly (4) located above the drill bit (3). The stirring assembly (4) includes a sleeve (41) fitted on the drill rod (1) and a plurality of stirring blades (42) movably connected to the sleeve (41). A bidirectional overrunning clutch is provided between the sleeve (41) and the drill rod (1). The upper end of the stirring blade (42) is rotatably connected to the sleeve (41), and the stirring blade (42) is adapted to swing up and down relative to the sleeve (41) to achieve the switching between its unfolded and retracted states. A stirring drive device for driving the stirring blade (42) to unfold and retract is provided between the stirring blade (42) and the sleeve (41).

2. The grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The stirring drive device includes a linear actuator (43) and a slider (44) slidably connected to a sleeve (41). At least one connecting rod (45) is rotatably connected to the slider (44). The other end of the connecting rod (45) is rotatably connected to the stirring blade (42). One end of the linear actuator (43) is rotatably connected to the sleeve (41), and the other end of the linear actuator (43) is rotatably connected to the connecting rod (45). A locking mechanism for limiting the sliding of the slider (44) is provided between the slider (44) and the sleeve (41).

3. The grouting device capable of simultaneous hole expansion and stirring according to claim 2, characterized in that: The locking mechanism includes a locking block (46) on the sleeve (41), a locking groove (461) on the locking block (46), and a locking tongue (47) slidably connected to the slider (44) and capable of being inserted into the locking groove (461). A locking driver (48) for driving the locking tongue (47) to extend into the locking groove (461) and an elastic reset member (49) for elastically pressing the locking tongue (47) away from the locking groove (461) are provided between the locking tongue (47) and the slider (44).

4. The grouting device capable of simultaneous hole expansion and stirring according to claim 3, characterized in that: It also includes a controller. The lower part of the drill rod (1) is equipped with a depth positioning sensor, a drill rod torque sensor, a blade extension angle sensor and a grouting pressure sensor. The main drive device (2), grout supply device, linear driver (43), locking driver (48), depth positioning sensor, drill rod torque sensor, blade extension angle sensor and grouting pressure sensor are all electrically connected to the controller and controlled by it.

5. The grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The stirring blade (42) has several serrated protrusions (421) on its edge.

6. The grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The stirring blades (42) are divided into at least two layers along the axial direction of the sleeve (41), and the stirring blades (42) of each layer are staggered from each other in the circumferential direction of the sleeve (41).

7. The grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The side wall of the drill rod (1) is provided with a plurality of second grouting holes (12) at the location of the mixing assembly (4). The second grouting holes (12) are connected to the grouting pipe (11) and are used to assist grouting during the mixing process.

8. A grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The drill bit (3) has several spiral cutting edges (32) on its sidewall.

9. A grouting device capable of simultaneous hole expansion and stirring according to claim 1, characterized in that: The drill bit (3) has an annular groove (33) on its side wall, and the first grouting hole (31) is located in the groove (33).

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