Controllable angle oblique micro-disturbance grouting device and use method thereof

Abstract

The controllable-angle oblique micro-disturbance grouting device comprises a grouting device and a static pressure device; a partition plate is arranged in the interior of the grouting pipe body of the grouting device to divide the cavity into two parts; an inclination sensor is arranged in the space on one side of the partition plate; a grouting hole is arranged on the side wall of the grouting pipe body on the other side of the partition plate; the static pressure device comprises a pressing and pulling device, a sleeve, a centralizer, a grouting rod and an inclination adjusting device; the linear sliding groove is arranged on the centralizer, the pressing and pulling device is limited in the sliding groove and can move along the sliding groove under the action of external driving force; the upper end of the sleeve is detachably connected with the lower end of the pressing and pulling device; the inclination adjusting device can adjust the inclination of the centralizer in real time; the grouting rod is in the form of sectional connection, when the sleeve is pressed into place, the sections of the grouting rod can be gradually connected with each other and penetrate into the sleeve from top to bottom, and the tail of the grouting rod is connected with the pressing and pulling device.

Description

Technical Field

[0001] This invention relates to the field of subway repair and reinforcement technology, specifically to a grouting device and its method of use for injecting grout into a designated location in the soil using an adjustable-angle inclined grouting injector. Background Technology

[0002] With economic development and the continuous increase in subway operating mileage, more and more construction projects are being built near subway lines, and the scale of these projects is also increasing, inevitably causing significant deformation of subway tunnels. In recent years, the micro-disturbance grouting method, as a technique with minimal impact on the surrounding environment, high controllability, and good reinforcement effect, has become an important means of repairing subway tunnel deformation.

[0003] Settlement and convergence deformation are of particular concern in subway tunnel deformation. The repair method for settlement deformation typically involves drilling a hole downwards from the bottom of the tunnel, penetrating the tunnel segments, and then inserting grouting pipes into the underlying soil to lift and grout the tunnel. The repair method for convergence deformation typically involves vertically inserting grouting pipes from the ground at a certain distance on both sides of the tunnel, grouting the tunnel laterally, and reducing the tunnel's transverse diameter through the lateral pressure of the grout.

[0004] However, some problems still exist in the current grouting repair of lateral micro-disturbances in subways:

[0005] (1) Engineering practice shows that when using bottom-drilling grouting in subway tunnels for settlement repair, the upward pressure of the grout at the bottom of the tunnel may cause greater lateral convergence deformation. In some cases, the excessive convergence deformation may necessitate further lateral micro-disturbance grouting to address the tunnel convergence, thus increasing costs. In addition, bottom-drilling in the tunnel is a destructive method for the tunnel structure, posing certain safety hazards for its long-term use.

[0006] (2) When the subway settlement and convergence deformation need to be repaired at the same time, the conventional single repair method may cause the other deformation index to change. Therefore, it is very difficult to coordinate the two grouting repair constructions during the repair process, making it difficult to control the repair effect.

[0007] (3) In the grouting repair project of subway tunnel convergence deformation, there are often situations such as dense underground pipelines and urban main roads above the tunnel. Conventional vertical drilling for micro-disturbance grouting is often difficult to implement, which brings certain difficulties to tunnel repair.

[0008] Therefore, it is of great value to study a grouting repair method that uses a small-angle oblique injection of grouting devices to a close lateral position of the tunnel to repair tunnel settlement or convergence deformation. Summary of the Invention

[0009] To address the problems existing in current methods for repairing settlement and convergence in subway tunnels, this invention provides an adjustable-angle grouting device that is inclinedly pressed into the soil layer, along with its usage method. Combined with an inclinometer installed at the end of the grouting device, the insertion angle of the grouter within the stratum can be monitored in real time, preventing the grouter from deviating from its designed position and thus threatening tunnel safety or resulting in poor grouting effects. A pre-positioned and extended underground straightening sleeve effectively controls the pressing angle of the grouting rod and grouter, thereby ensuring the quality of the grouting construction.

[0010] The present invention adopts the following technical solution:

[0011] A controllable-angle oblique micro-disturbance grouting device includes a grouter and a static pressure device. The grouting pipe 1 of the grouter has a partition 6 inside, dividing its cavity into two parts. An angle sensor 7 is installed in the space on one side of the partition 6. Grouting holes 4 are opened on the side wall of the grouting pipe 1 on the other side of the partition. The static pressure device includes a pressure-pulling device 23, a sleeve 34, a stabilizer 21, a grouting rod 35, and an angle adjustment device. The stabilizer 21 has a linear groove 22. The pressing and pulling device 23 is confined within the sliding groove 22 and can move along the sliding groove 22 under the action of external driving force; the upper end of the sleeve 34 is detachably connected to the lower end of the pressing and pulling device 23; the tilt angle adjustment device can adjust the tilt angle of the stabilizer 21 in real time; the grouting rod 35 is in the form of segmented connection. After the sleeve 34 is pressed into place, the segments of the grouting rod 35 can be gradually connected to each other and inserted into the sleeve 34 from top to bottom. The tail of the grouting rod is connected to the pressing and pulling device 23.

[0012] Preferably, the tilt adjustment device includes a front fixing device 26, a horizontal telescopic rod 27, and a rear telescopic system 28; the front fixing device 26 is fixed to the vehicle; the front end of the horizontal telescopic rod 27 is connected to the front fixing device, and the rear end is connected to the sliding seat of the rear telescopic system 28 and can extend and retract to drive the sliding seat to move horizontally; the rear telescopic system 28 includes at least two sets of hydraulic telescopic rods, one end of which is hinged to the centering device 21, and the other end is hinged to the sliding seat; the tilt angle of the centering device 21 is adjusted by adjusting the length of the hydraulic telescopic rods.

[0013] Preferably, the upper part of the grouting pipe body 1 is fixedly connected with a bolt head 2 for connecting with the grouting rod, and the length of the bolt head 2 is not less than the diameter of the grouting pipe body 1.

[0014] Preferably, the bottom of the grouting pipe 1 has a conical head.

[0015] Preferably, the grouting holes 4 are not opened on the same cross section to ensure that the grouting pipe body has sufficient strength.

[0016] Preferably, the partition 6 is arranged horizontally to divide the cavity into upper and lower parts, wherein the tilt sensor 7 is located in the lower cavity.

[0017] Preferably, the tilt sensor is one or more of a gravity accelerometer and an angle meter.

[0018] Preferably, the side of the grouting device is provided with an armored cable 9, the lower end of which is connected to the tilt sensor 7 and leads out from the corresponding hole below the side wall of the grouting device, extending all the way to the ground to connect with the data acquisition device, powering the tilt sensor and transmitting data; a sealing sleeve 10 is installed at the outlet of the armored cable 9 below the side wall of the grouting device; at least one buckle is provided on the grouting device and each grouting rod to clamp and fix the armored cable in sections to the outer wall of the grouting device and the grouting rod.

[0019] Preferably, the static pressure device has a drivable carrying platform, and a fixing device 31 is inserted from the carrying platform to the ground. After the carrying platform travels to the designated location, it is lowered to the ground and contacts the ground, and is pressed down and fixed by power.

[0020] Preferably, the casing 34 is a hollow steel pipe with a wall thickness greater than 5mm and an inner diameter greater than the grouting rod by 3mm to 5mm. The length of each casing section is fixed, and the sleeves are interlocked above the stabilizer via a sliding groove. Before construction, the casings are assembled and driven more than 3m below the ground to fix the construction angle. Then, the grouting rod is inserted into the sleeve to guide the angle for pressing construction. If an angle deviation occurs during construction, the angle of the stabilizer can be adjusted to adjust the angle of the sleeve and correct the pile driving angle.

[0021] Preferably, the grouting rod is connected to the grouting device by a thread, and its interior is a hollow tube with the same inner and outer diameters as the grouting device. When the grouting rod and the grouting device are pressed into the designated depth, the grout flows from the grouting rod into the grouting device and is injected into the soil layer at the corresponding location.

[0022] A method of using the above-mentioned controllable angle oblique micro-disturbance grouting device includes the following steps:

[0023] S1. Determine the angle and depth to which the grouting rod needs to be pressed in;

[0024] S2. Lay out the layout of each grouting location;

[0025] S3. According to the layout position, drive the grouting equipment to the corresponding position, adjust the angle of the stabilizer, and after reaching the specified angle, install the clamp that matches the casing at the front end of the pressing and pulling device, press the assembled casing section down to a certain depth below the ground surface, and determine whether the angle of the casing is consistent with the design angle.

[0026] S4. After the casing angle is adjusted, connect the grouting device 36 to the grouting rod 35. Install a clamp matching the grouting rod at the front end of the pressing and pulling device, press the grouting rod section by section together with the grouting device into the formation, and fix the armored cable on the grouting device and the grouting rod at the same time.

[0027] S5. During construction, the tilt sensor is read at each fixed depth to ensure that there is no significant deviation in the pressing angle;

[0028] S6. After pressing the grouting device 36 to the designated position, remove the pressing and pulling device 23, connect the grouting rod to the grouting hose 43, and start the grouting construction at that depth position according to the design pressure and flow rate.

[0029] Preferably, once the grouting volume at a certain depth reaches the design requirement, grouting is paused, the grouting hose 43 is removed, the grouting rod is reconnected using a pressure-pull device, the grouting rod and grouting device are pulled up to a certain height, the pressure-pull device is removed, the grouting hose 43 is connected to the grouting rod, and grouting at that depth is carried out; after grouting is completed, the grouting rod and grouting device are lifted to the ground, and after cleaning, the grouting equipment is moved to the next hole for grouting construction.

[0030] The beneficial effects of this invention are as follows:

[0031] 1) It enables the grouting device to enter the soil at a designated location to complete the inclined hole grouting construction. By using inclined hole grouting, it can simultaneously repair the settlement and convergence deformation of the subway tunnel, ensuring the safety of the subway tunnel structure.

[0032] 2) An inclination sensor is installed in the grouting device to monitor the insertion angle of the grouting device in real time, preventing the grouting device from deviating from the design position and causing threats to tunnel safety or poor grouting effect;

[0033] 3) The straightening sleeve extending underground can further and more effectively control the angle of the grouting rod and grouting device, thereby ensuring the quality of the grouting construction;

[0034] 4) Inclined hole grouting can simultaneously repair the settlement and convergence deformation of subway tunnels. The process is simpler than grouting methods that repair settlement or convergence separately, saving grouting materials, shortening the repair period, and improving the fault tolerance rate of grouting repair. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the internal structure of the grouting device.

[0036] Figure 2 This is a schematic diagram of the grouting equipment after the angle has been adjusted.

[0037] Figure 3 This is a schematic diagram of the sleeve being installed section by section (the lower end of the pressing and pulling device 23 is equipped with a clamp that matches the sleeve).

[0038] Figure 4 This is a schematic diagram showing the casing being pressed into place.

[0039] Figure 5 This is a schematic diagram showing the installation and pressing of the grouting rods section by section.

[0040] Figure 6 This is a schematic diagram showing the grouting device being pressed into the designed position, connected to the main hose 43, and grouting starting.

[0041] Figure 7 This is a schematic diagram of grouting completed on one side.

[0042] Figure 8 This is a schematic diagram of the completion of double-sided grouting.

[0043] In the diagram, 1. Grouting pipe body, 2. Bolt head, 3. Conical head, 4. Grouting hole, 5. Internal cavity of grouting device, 6. Partition plate, 7. Tilt sensor, 8. Tilt sensor fixing component, 9. Armored cable, 10. Sealing sleeve, 11. Cable fixing buckle. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] First, the specific structure and function of the grouting device will be explained, see [link to relevant documentation]. Figure 1 :

[0046] Grouting pipe body 1 is a hollow pipe with a certain wall thickness. The diameter and length of the pipe can be customized according to specific grouting requirements.

[0047] A bolt head 2 is fixedly installed above the grouting pipe body. The bolt head 2 is used to connect with the grouting rod with internal threads. The length of the bolt head should not be less than the diameter of the grouting pipe body to ensure the rigidity and stability of the connection position.

[0048] The conical head 3 at the bottom of the grouting pipe makes it easier to penetrate the soil layer and reach the designated grouting position when entering.

[0049] The diameter and number of grouting holes 4 opened on the grouting pipe body are designed according to the requirements. At the same time, they should be avoided as much as possible to ensure that they are opened on the same cross section to ensure that the grouting pipe body has sufficient strength.

[0050] The internal cavity 5 of the grouting device serves as a channel for the flow of grout during grouting.

[0051] The grouting pipe 1 of the grouting machine is equipped with a partition 6 that divides its cavity into upper and lower parts; an inclination sensor 7 is installed in the space below the partition 6; the grouting hole 4 is opened on the side wall of the grouting pipe 1 above the partition. The partition 6 prevents the large grouting pressure and grout from damaging the inclination sensor below. Therefore, it is necessary to ensure sufficient connection strength and sealing between the partition and the grouting pipe.

[0052] The tilt sensor 7 can be a gravity accelerometer, angular velocity meter, etc., and its function is to monitor the attitude of the grouting device to prevent it from deviating from the preset direction and getting too close or too far from the tunnel, thereby damaging the tunnel or failing to achieve the repair and reinforcement effect. The tilt sensor can monitor the insertion angle of the grouting device in real time to prevent the grouting device from deviating from the design orientation, which could threaten tunnel safety or result in poor grouting effect.

[0053] The tilt sensor fixture 8 fixes the tilt sensor 7 in the cavity below the grout injector.

[0054] Armored cable 9, whose lower end is connected to the tilt sensor, extends from the corresponding hole below the side wall of the grouting device all the way to the ground and connects to the data acquisition device, providing power to the tilt sensor and transmitting data. The armored cable has high resistance to high pressure and tensile strength, and can withstand the external forces encountered when the cable is pressed into the soil along with the grouting equipment.

[0055] The 10 is a sealing sleeve 10, which is installed at the outlet of the armored cable below the side wall of the grouting device. It has high flexibility and sealing performance, and can prevent foreign objects such as mud and water from entering the cavity where the tilt sensor is located.

[0056] The cable fixing buckle 11 is provided with no less than one buckle on the grouting device and each grouting rod, which clamps and fixes the armored cable in sections to the outer wall of the grouting device and the grouting rod. The buckle has relatively high strength and rigidity, which on the one hand prevents the cable from getting tangled during the entry process, and on the other hand can better distribute the soil resistance encountered by the armored cable when entering the soil in sections.

[0057] The following describes the supporting hydrostatic equipment with angle adjustment and its specific working process. (See attached image.) Figures 2-8 :

[0058] Overall device for centralizing device 21.

[0059] The slide groove 22 is set on the stabilizer 21, and the sleeve is connected to the stabilizer through the slide groove. The sleeve can be pressed into the ground through the slide groove.

[0060] The pressing and pulling device 23 can move up and down along the slide groove. Different sizes of clamps can be replaced at its lower end to press rods of various sizes down or up along the slide groove. The power source includes, but is not limited to, static pressure, vibration, and rotation. A mechanical transmission mechanism (generally a gear) is installed within the slide groove 22, and a matching gear is also present at the lower part of the pressing and pulling device 23. The sliding of the pressing and pulling device 23 along the slide groove 22 is achieved through gear transmission. This transmission structure itself is prior art and therefore will not be described in detail in this embodiment.

[0061] The oil pipe 24 of the pressing and drawing device provides power for the pressing and drawing device to move up and down along the slide groove.

[0062] The connecting device 25 is used to connect the telescopic system and the centralizer.

[0063] The front-mounted retainer 26 is fixed to the vehicle and cannot be moved.

[0064] The horizontal telescopic pole 27 connects the front fixing device and the rear telescopic system, and can extend and retract to adjust the distance between the front and rear devices to control the construction angle.

[0065] The rear telescopic system 28 consists of multiple hydraulic telescopic rods and is connected to the centralizer. The angle of the centralizer can be adjusted by adjusting the length of the hydraulic rods.

[0066] The power system 29 provides power for the hydraulic drive system, vehicle movement, etc., and the power source can be electricity, fuel oil or other fuels.

[0067] The power system drive line 30 of the hydraulic drive device.

[0068] The equipment fixing device 31 retracts during vehicle movement and retracts to contact the ground upon reaching the designated location. It can be driven by hydraulic, electric, or other methods. If the vehicle's weight is insufficient to meet the grouting pressure requirements, a ground anchor device can be added.

[0069] The drive unit 32 is equipped with tires, tracks and other equipment to facilitate the normal operation of the grouting equipment.

[0070] The stratum 33 is to be reinforced by grouting.

[0071] The casing 34 is a high-strength hollow steel pipe with a wall thickness greater than 5mm and an inner diameter 3mm to 5mm larger than the grouting rod. Each casing section can be 1m long or other lengths. The casings are interlocked above the stabilizer via a sliding groove. Before construction, the grouting assembly casing is first driven more than 3m below the ground to fix the construction angle. Then, the grouting rod is inserted into the casing to guide the angle for pressing construction. If an angle deviation occurs during construction, the angle of the stabilizer can be adjusted to adjust the angle of the casing and correct the pile driving angle.

[0072] The grouting rod 35 is connected to the grouting device via threads. It is a hollow tube with the same inner and outer diameters as the grouting device. When the grouting rod and the grouting device are pressed into the designated depth, the grout flows from the grouting rod into the grouting device and is injected into the soil layer at the corresponding location.

[0073] Grouting device 36. Alternatively, a one-way stop valve can be installed on the upper part of the grouting device 36.

[0074] The method of using the small-angle oblique micro-disturbance grouting device of the present invention is as follows:

[0075] S1. Determine the edge position of subway tunnel 42 through design data and on-site layout, and design the position of grouting equipment, the angle of grouting rod insertion and the required insertion depth according to the site conditions.

[0076] S2. On-site, RTK, GPS, total station and other means were used to lay out each grouting location.

[0077] S3. According to the layout position, drive the grouting equipment 41 to a suitable position, adjust the telescopic system, adjust the angle of the stabilizer by telescopic hydraulic rod, and after reaching the specified angle, install the clamp matching the casing at the front end of the pressing and pulling device, press the assembled casing section by section down to a certain depth below the ground surface, and determine whether the angle of the casing is consistent with the design angle.

[0078] S4. After adjusting the casing angle, connect the grouting device 36 to the grouting rod 35. Install a clamp matching the grouting rod at the front end of the pressing and pulling device, and press the grouting rod section by section together with the grouting device into the formation. At the same time, fix the armored cable to the grouting device and the grouting rod.

[0079] S5. During construction, the tilt sensor needs to be read at each fixed depth to ensure that there is no significant deviation in the pressing angle.

[0080] S6. After pressing the grouting device 36 to the designated position, remove the pressing and pulling device 23, connect the grouting rod to the grouting hose 43, and start the grouting construction at that depth position according to the design pressure and flow rate.

[0081] S7. Once the grouting volume at a certain depth reaches the design requirement, grouting is paused. The grouting hose 43 is removed, and the grouting rod is reconnected using a pull-out device. The grouting rod, along with the grouting device, is pulled up to a certain height. Then, the pull-out device is removed, and the grouting hose 43 is connected to the grouting rod to perform grouting at that depth. The above procedures are repeated sequentially to gradually form the grout body 44 in the soil layer and complete the grouting of the hole.

[0082] S8. After grouting is completed, lift the grouting rod and grouting device to the ground. After cleaning, move the grouting equipment to the next hole for grouting construction.

[0083] Through the above steps, grout is gradually pumped up along the bottom of the subway tunnel to reinforce the soil below and on the sides of the tunnel. At the same time, the squeezing effect of the grout can effectively repair the tunnel settlement and convergence deformation.

[0084] The above are preferred embodiments of the present invention. Those skilled in the art can make various modifications or improvements based on these embodiments. Without departing from the overall concept of the present invention, such modifications or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A method for using a controllable-angle oblique micro-disturbance grouting device, characterized in that: Including grouting equipment and static pressure equipment; The grouting pipe body (1) of the grouting device is provided with a partition (6) that divides its cavity into two parts; the partition (6) is arranged horizontally to divide the cavity into upper and lower parts, wherein the tilt sensor (7) is located in the lower cavity; the grouting hole (4) is opened on the side wall of the grouting pipe body (1) on the upper part of the partition; the tilt sensor (7) is coaxial with the grouting pipe body (1); The static pressure equipment includes a pressure-pulling device (23), a sleeve (34), a stabilizer (21), a grouting rod (35), and an inclination adjustment device; The stabilizer (21) is provided with a linear groove (22), the pressing and pulling device (23) is limited to the groove (22), and can move along the groove (22) under the action of external driving force; the upper end of the sleeve (34) is detachably connected to the lower end of the pressing and pulling device (23); The tilt angle adjustment device can adjust the tilt angle of the stabilizer (21) in real time; The grouting rod (35) is in the form of segmented connection. After the sleeve (34) is pressed into place, the segments of the grouting rod (35) can be gradually connected to each other and inserted into the sleeve (34) from top to bottom. The tail of the grouting rod is connected to the pressing and pulling device (23). The tilt adjustment device includes a front fixing device (26), a horizontal telescopic rod (27), and a rear telescopic system (28). The front fixing device (26) is fixed on the vehicle; the front end of the horizontal telescopic rod (27) is connected to the front fixing device, and the rear end is connected to the sliding seat of the rear telescopic system (28), and can extend and retract to drive the sliding seat to move horizontally. The rear telescopic system (28) includes at least two sets of hydraulic telescopic rods, one end of which is hinged to the stabilizer (21) and the other end is hinged to the sliding seat; The tilt angle of the stabilizer (21) can be adjusted by adjusting the length of the hydraulic telescopic rod; The side of the grouting device is provided with an armored cable (9), the lower end of which is connected to the tilt sensor (7) and led out from the corresponding hole below the side wall of the grouting device, extending all the way to the ground to connect with the data acquisition device, powering the tilt sensor and transmitting data; a sealing sleeve (10) is installed at the outlet of the armored cable (9) below the side wall of the grouting device; at least one buckle is provided on the grouting device and each grouting rod to clamp and fix the armored cable in sections to the outer wall of the grouting device and the grouting rod; This method is used for settlement and convergence repair in subway tunnels. The method includes the following steps: S1. Determine the angle and depth to which the grouting rod needs to be pressed in; S2. Lay out the layout of each grouting location; S3. According to the layout position, drive the grouting equipment to the corresponding position, adjust the angle of the stabilizer, and after reaching the specified angle, install the clamp that matches the casing at the front end of the pressing and pulling device, press the assembled casing section down to a certain depth below the ground surface, and determine whether the angle of the casing is consistent with the design angle. S4. After the casing angle is adjusted, connect the grouting device (36) to the grouting rod (35). Install a clamp matching the grouting rod at the front end of the pressing and pulling device, press the grouting rod section by section together with the grouting device into the formation, and fix the armored cable on the grouting device and the grouting rod. S5. During construction, the tilt sensor is read at each fixed depth to ensure that there is no significant deviation in the pressing angle; S6. After pressing the grouting device (36) to the designated position, remove the pressing and pulling device (23), connect the grouting rod to the grouting hose (43), and start the grouting construction at this depth position according to the design pressure and flow rate; Once the grouting volume at a certain depth reaches the design requirements, grouting is paused, the grouting hose (43) is removed, and the grouting rod is reconnected using a pressure-pull device. The grouting rod and grouting device are pulled up to a certain height, and then the pressure-pull device is removed. The grouting hose (43) is then connected to the grouting rod to perform grouting at that depth. After grouting is completed, the grouting rod and grouting device are lifted to the ground. After cleaning, the grouting equipment is moved to the next hole for grouting construction.

2. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The upper part of the grouting pipe (1) is fixedly connected with a bolt head (2) for connecting with the grouting rod, and the length of the bolt head (2) is not less than the diameter of the grouting pipe (1).

3. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The bottom of the grouting pipe (1) has a conical head.

4. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The grouting holes (4) are not opened on the same cross section to ensure that the grouting pipe body has sufficient strength.

5. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The tilt sensor is one or more of a gravity accelerometer and an angle meter.

6. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The static pressure device has a drivable carrying platform. A fixing device (31) is inserted into the ground on the carrying platform. After the carrying platform travels to the designated location, it is lowered to the ground and contacts the ground, and is pressed down and fixed by power.

7. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The casing (34) is a hollow steel pipe with a wall thickness greater than 5mm and an inner diameter greater than the grouting rod by 3mm~5mm. The length of each casing section is fixed. The sleeves are interlocked above the stabilizer by a sliding groove. Before construction, the casings are assembled and driven into the ground for more than 3m to fix the construction angle. Then, the grouting rod is inserted into the sleeve to guide the angle for pressing construction. If an angle deviation occurs during construction, the angle of the stabilizer can be adjusted to adjust the angle of the sleeve to correct the pile driving angle.

8. The method of using the controllable angle oblique micro-disturbance grouting device as described in claim 1, characterized in that: The grouting rod is connected to the grouting device via threads. It is a hollow tube with the same inner and outer diameters as the grouting device. When the grouting rod and the grouting device are pressed into the designated depth, the grout flows from the grouting rod into the grouting device and is injected into the soil layer at the corresponding location.

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