Rotary grouting device based on MICP solidified soil body and using method

Abstract

The invention relates to the technical field of microbial grouting reinforcement of soil bodies, in particular to a rotary grouting device based on MICP solidified soil bodies and a using method, and the rotary grouting device based on the MICP solidified soil bodies comprises a grouting vehicle, a controller, a grouting box and a grouting assembly; the grouting assembly comprises a first rotating shaft, a grouting barrel, an inclined driving seat, a second rotating shaft, a liquid injection disc and a pushing disc, and rotary grouting is achieved through spherical hinge of the inclined driving seat and a liquid injection cavity; a grouting hole and a liquid inlet channel are arranged at the bottom of the grouting cylinder; the liquid inlet channel is provided with a one-way valve; a driving box, a liquid storage box and a driving part are arranged at the top of the grouting box, the controller controls the driving part, and the driving part drives the stirring assembly to stir bacterial liquid or cementing liquid through a first connecting shaft; the liquid feeding pipe is communicated with the liquid storage tank and the liquid inlet channel. The first connecting shaft further drives the telescopic assembly to adjust the grouting angle. According to the device, air in the soil body can be sucked to control the flowing direction of the bacterial liquid or the cementing liquid in the soil body while multi-angle spraying of the bacterial liquid or the cementing liquid can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of microbial grouting to consolidate soil, and in particular to a rotary grouting device based on MICP to solidify soil and a use method thereof. Background Art

[0002] In recent years, microbial grouting technology for soil reinforcement has become a research hotspot due to its wide application prospects, covering multiple fields such as foundation treatment, dust control, protection of cultural relics and slope stability. This technology involves injecting specific microorganisms and the nutrients they need into the soil, and using the urease produced in the microorganisms to decompose urea into carbonate ions. Subsequently, by introducing a calcium source, it reacts with these carbonate ions to form calcium carbonate crystals. These crystals play a filling role between soil particles, improve the density of the soil, and can effectively cement the originally loose soil particles, enhance the bonding force between the soil, and ultimately achieve a significant increase in soil strength.

[0003] In the prior art, when grouting operations are performed on soil based on a microbial grouting reinforcement device, a single or multiple grouting pipes are usually inserted into the soil, and a bacterial liquid or a binder liquid is pumped into the soil using high pressure to perform grouting reinforcement operations. However, when the bacterial liquid or the binder liquid is pumped into the soil, due to the effects of gravity and gaps in the soil, the flow direction of the bacterial liquid or the binder liquid in the soil is difficult to control. This will result in it being difficult to comprehensively cover the soil at the grouting position even when multiple grouting pipes are simultaneously pumping the bacterial liquid or the binder liquid into the soil.

[0004] In summary, how to solve the problem that when the bacterial liquid or cementing liquid is pumped into the soil, the flow direction of the bacterial liquid or cementing liquid in the soil is difficult to control due to the action of gravity and the gaps in the soil. This will result in the problem that even when multiple grouting pipes are simultaneously pumping the bacterial liquid or cementing liquid into the soil, it is difficult to comprehensively cover the soil at the grouting position. This has become a difficult problem that needs to be urgently solved in this field. Therefore, it is necessary to propose a rotary grouting device and a method for using MICP-solidified soil. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a rotary grouting device and a use method based on MICP solidified soil, which is used to realize the all-round and multi-angle injection of bacterial liquid or cementing liquid through the rotary grouting design in the grouting component, and at the same time, suck the air in the soil to control the flow direction of the bacterial liquid or cementing liquid in the soil, thereby effectively solving the problem that the flow direction of the bacterial liquid or cementing liquid is difficult to control and it is difficult to fully cover the soil at the grouting position in the traditional grouting method.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a rotary grouting device based on MICP solidified soil, comprising a grouting vehicle, the grouting vehicle comprising a vehicle body and a controller, a through hole being opened at the bottom of the vehicle body, a grouting box being fixedly connected to the top of the vehicle body, and the bottom of the grouting box being connected to the through hole.

[0007] The grouting box is provided with a grouting assembly for rotary grouting of the soil; the grouting assembly includes a rotating shaft and a grouting cylinder; the top end of the rotating shaft passes through the top wall of the grouting cylinder and is rotatably connected to the top wall of the grouting cylinder; an inclined driving seat is fixedly connected inside the grouting cylinder, and a driven disk is rotatably connected to the bottom of the inclined driving seat; the first rotating shaft passes through the driving seat and is rotatably connected to the driving seat; the driven disk and the first rotating shaft are coaxially fixedly connected.

[0008] The bottom wall of the grouting barrel is rotatably matched with a liquid injection plate, and a plurality of liquid injection cavities are opened on the liquid injection plate along its circumference. The liquid injection cavities are vertically slidably matched with a push plate, and the push plate ball is hinged at the bottom of the driven plate, and the end of the push plate away from the liquid injection cavity is hinged with the ball at the bottom of the inclined driving seat; grouting holes are opened at the bottom of the grouting barrel, and a liquid inlet channel is opened at the bottom of the grouting barrel, and the liquid inlet channels are arranged one by one corresponding to the grouting holes and are connected to each other.

[0009] A driving box is fixedly connected to the top of the grouting box, and a liquid storage tank is fixedly connected to the top of the driving box. The interior of the liquid storage tank is divided into liquid storage chambers arranged adjacent to each other in the upper and lower parts. A driving member is fixedly connected to the top of the liquid storage tank. The controller is used to control the operation of the driving member. The output shaft of the driving member passes through the top wall of the liquid storage tank and extends into the liquid storage tank and is fixedly connected to a connecting shaft. A stirring assembly for stirring the liquid in the liquid storage tank is provided on the connecting shaft; a transmission assembly with an adjustable angle is provided between the rotating shaft and the connecting shaft.

[0010] The bottom of the liquid storage tank is connected with a liquid delivery pipe, and one end of the liquid delivery pipe away from the liquid storage tank is connected with a liquid inlet channel, and the liquid inlet channel is connected with a one-way valve.

[0011] The bottom end of the connecting shaft penetrates the bottom wall of the liquid storage box and the top wall of the driving box and extends into the driving box. The bottom end of the connecting shaft is provided with a telescopic component for driving the transmission component to telescope.

[0012] The technical principles of the above scheme are as follows:

[0013] The first rotating shaft, the inclined driving seat, the second rotating shaft and the injection plate in the slurry assembly together constitute a rotary grouting mechanism. When the first rotating shaft rotates, the inclined driving seat will rotate accordingly due to its inclined design and push the push plate to slide up and down in the injection cavity. This design allows the bacterial liquid or cementing liquid to be compressed in the injection cavity and sprayed out through the grouting hole. At the same time, due to the rotation of the inclined driving seat, the up and down sliding of the push plate is not a simple reciprocating motion, but has a certain rotation angle, thereby realizing the all-round and multi-angle injection of the bacterial liquid or cementing liquid in the soil; when the bacterial liquid or cementing liquid is sprayed out from the grouting hole, the grouting hole opposite to the grouting hole spraying the bacterial liquid or cementing liquid will form a low-pressure area in the soil, thereby attracting the grouting hole spraying the bacterial liquid or cementing liquid to move to this area.

[0014] The above scheme has the following beneficial effects:

[0015] 1. The present invention realizes the all-round and multi-angle injection of bacterial liquid or cementing liquid in the soil body through the rotary grouting design in the grouting assembly; when the first rotating shaft rotates, the inclined driving seat pushes the push plate to slide up and down in the injection cavity, and due to the rotation of the inclined driving seat, the up and down sliding of the push plate has a certain rotation angle, thereby ensuring that the bacterial liquid or cementing liquid can evenly cover the soil body at the grouting position, avoiding the problem that the flow direction of the bacterial liquid or cementing liquid is difficult to control and it is difficult to fully cover the soil body at the grouting position in the traditional grouting method.

[0016] 2. When the bacterial liquid or cementing liquid is sprayed out from the grouting hole, the grouting hole opposite to the grouting hole spraying the bacterial liquid or cementing liquid will form a low-pressure area in the soil, thereby attracting the grouting hole spraying the bacterial liquid or cementing liquid to move to this area; this air suction effect not only helps to further control the flow direction of the bacterial liquid or cementing liquid, but also promotes the full contact and mixing of the bacterial liquid or cementing liquid with soil particles, thereby improving the effect of grouting reinforcement.

[0017] 3. The present invention can flexibly adjust the grouting angle of the grouting barrel through the design of the transmission component, so as to adapt to the reinforcement requirements of soil bodies of different shapes and sizes. At the same time, the setting of the telescopic component enables the transmission component to be telescopically adjusted as needed, further improving the flexibility and efficiency of grouting reinforcement. This design enables the present invention to be widely used in multiple fields such as foundation treatment, dust control, protection of cultural relics and slope stability.

[0018] Furthermore, the telescopic assembly includes a spline shaft, the top end of the spline shaft is fixedly connected to the bottom end of the first connecting shaft, and a plurality of spline grooves are opened on the outside of the spline shaft; a telescopic cylinder is sleeved on the outside of the spline shaft, and the bottom end of the telescopic cylinder is fixedly connected to the second connecting shaft; the top wall of the telescopic cylinder and the spline grooves are vertically slidably matched; a slide cylinder is sleeved on the telescopic cylinder and vertically slidably matched, and the top end of the slide cylinder is fixedly connected to the top wall inside the drive box; the top of the spline shaft passes through the top wall of the slide cylinder and rotates with the top wall of the slide cylinder, and the top of the slide cylinder is provided with a telescopic control assembly for driving the telescopic cylinder to extend and retract on the spline shaft.

[0019] Beneficial effect: Through the coordinated use of the spline shaft, telescopic cylinder and sliding cylinder, the precise adjustment of the grouting angle of the grouting cylinder is achieved, and the flexibility and efficiency of grouting reinforcement are improved.

[0020] Furthermore, the telescopic control component includes a liquid inlet pipe, which is connected to the top of the slide cylinder, and a first solenoid valve is connected in the liquid inlet pipe, and a controller is used to control the opening and closing of the first solenoid valve; the end of the liquid inlet pipe away from the slide cylinder is connected to a positive hydraulic system; the top of the slide cylinder is also connected to a liquid outlet pipe, and a second solenoid valve is connected in the liquid outlet pipe, and the controller is used to control the opening and closing of the second solenoid valve, and the end of the liquid outlet pipe away from the slide cylinder is connected to a negative hydraulic system.

[0021] Beneficial effects: The positive hydraulic system and the negative hydraulic system are used to regulate the hydraulic pressure in the slide cylinder, thereby achieving precise sliding of the telescopic cylinder. This design not only simplifies the adjustment process, but also improves the accuracy and stability of the adjustment.

[0022] Furthermore, the stirring assembly includes a plurality of stirring blades, and the stirring blades are all fixedly connected to the outer side wall of the first connecting shaft.

[0023] Beneficial effect: The bacterial liquid or the cementing liquid is stirred by a plurality of stirring blades, thereby ensuring the uniformity and stability of the bacterial liquid or the cementing liquid and improving the effect of grouting reinforcement.

[0024] Furthermore, the transmission assembly includes a universal joint, the top end of the universal joint is fixedly connected to the bottom end of the second connecting shaft, and the bottom end of the universal joint is fixedly connected to the top end of the first rotating shaft.

[0025] Beneficial effect: The use of the universal joint allows the grouting angle of the grouting barrel to be flexibly adjusted to meet the reinforcement needs of soils of different shapes and sizes.

[0026] Furthermore, a pump box is fixedly connected to the top of the vehicle body, and a hydraulic pump assembly is fixedly connected to the bottom wall of the pump box. The controller is used to control the opening and closing of the hydraulic pump assembly, and the output end of the hydraulic pump assembly is connected to both the positive hydraulic system and the negative hydraulic system.

[0027] Beneficial effect: The opening and closing of the hydraulic pump assembly is controlled by the controller, thereby realizing hydraulic regulation of the positive hydraulic system and the negative hydraulic system, and providing a stable hydraulic source for the telescopic control assembly.

[0028] Furthermore, a liquid infusion pipe is connected to the top of the liquid storage tank; and the shape of the grouting hole is C-shaped.

[0029] Beneficial effect: The top of the liquid storage tank is connected with a liquid infusion pipe, which is convenient for adding bacterial liquid or cementing liquid into the liquid storage tank, thereby improving the convenience of grouting operation.

[0030] Furthermore, a liquid level sensor is fixedly connected to the inner wall of the liquid storage tank, and the controller is used to receive a liquid level signal in the liquid storage tank sent by the liquid level sensor.

[0031] Beneficial effect: The liquid level in the liquid storage tank is monitored in real time by the liquid level sensor, which ensures the continuity and stability of the grouting operation and avoids grouting interruption caused by insufficient liquid level.

[0032] Further, the method for using the rotary grouting device based on the above MICP solidified soil body comprises the following steps:

[0033] Step 1: Drive the grouting vehicle to the area to be grouted, inject bacterial liquid or cementing liquid into the liquid storage chamber according to different grouting modes, and clean the impurities on the surface of the area to be grouted.

[0034] Step 2: Control the telescopic assembly through a controller to make the grouting tube effectively contact the surface of the grouting area.

[0035] Step three, controlling the operation of the driving member through the controller, the output shaft of the driving member drives the first connecting shaft and the stirring assembly to rotate, and during the rotary grouting process, the stirring assembly continuously stirs the bacterial liquid or the binder in the liquid storage tank; at the same time, the grouting assembly outputs the bacterial liquid and the binder alternately in a cycle, or the grouting assembly outputs the bacterial liquid or the binder repeatedly in a cycle until the grouting is completed at a certain position in the grouting area.

[0036] Step 4. After grouting at a certain position in the grouting area is completed, adjust the angle of the grouting tube and repeat steps 2 and 3 until grouting at all positions in the grouting area is completed.

[0037] Furthermore, the grouting mode includes a synchronous grouting mode and a step-by-step grouting mode.

[0038] When the synchronous grouting mode is adopted, the bacterial liquid is injected into any one liquid storage chamber, and the cementing liquid is injected into the other liquid storage chamber, and the liquid inlet channel on one side is connected with the liquid storage chamber storing the bacterial liquid, and the liquid inlet channel on the other side is connected with the liquid storage chamber storing the cementing liquid. Then the controller controls the operation of the driving part, and the bacterial liquid and the cementing liquid are continuously and alternately output in a cycle on one side of the bottom of the grouting barrel.

[0039] When the step-by-step grouting mode is adopted, the bacterial liquid is first injected into both liquid storage chambers, and then the controller controls the driving component to operate, and the bottom side of the grouting barrel continuously and repeatedly outputs the bacterial liquid; after the bacterial liquid is injected, the cementing liquid is injected into both liquid storage chambers, and then the controller controls the driving component to operate, and the bottom side of the grouting barrel continuously and repeatedly outputs the cementing liquid.

[0040] Beneficial effects: The grouting vehicle is driven to the area to be grouted and impurities are cleaned to ensure the smooth progress of the grouting operation and avoid the influence of impurities on the grouting effect and grouting equipment. The driving component is started by the controller to stir the bacterial liquid or the cementing liquid, which ensures the uniformity and stability of the bacterial liquid or the cementing liquid and improves the effect of grouting reinforcement. During the stirring process, the stirring blades of the stirring assembly rotate with the first connecting shaft to fully mix the bacterial liquid or the cementing liquid in the liquid storage tank, avoiding the poor reinforcement effect caused by the uneven composition of the bacterial liquid or the cementing liquid. The inclined driving seat pushes the push plate to perform piston movement in the injection cavity, and the bacterial liquid or the cementing liquid is rotated and pumped into the soil through the grouting hole. This rotary grouting method not only helps the uniform distribution of the bacterial liquid or the cementing liquid in the soil, but also can further control the flow direction of the bacterial liquid or the cementing liquid through air suction, thereby improving the effect of grouting reinforcement.

[0041] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is an axonometric view of a rotary grouting device based on MICP solidified soil in an embodiment of the present invention.

[0043] Figure 2 It is a side cross-sectional view of a rotary grouting device based on MICP solidified soil in an embodiment of the present invention.

[0044] Figure 3 It is a side sectional view of a grouting barrel in an embodiment of the present invention.

[0045] Figure 4 It is a bottom view of the grouting barrel in the embodiment of the present invention.

[0046] Figure 5 It is a side cross-sectional view of the telescopic assembly in an embodiment of the present invention.

[0047] Figure 6 It is a top cross-sectional view of the telescopic assembly in an embodiment of the present invention.

[0048] The figure marks in the drawings of the specification include: 1. vehicle body; 2. grouting box; 3. first rotating shaft; 4. grouting cylinder; 5. tilting drive seat; 6. driven plate; 7. liquid injection plate; 8. liquid injection chamber; 9. push plate; 10. grouting hole; 11. liquid inlet channel; 12. drive box; 13. liquid storage tank; 14. driving member; 15. first connecting shaft; 16. one-way valve; 17. spline shaft; 18. telescopic cylinder; 19. second connecting shaft; 20. slide cylinder; 21. liquid inlet pipe; 22. first solenoid valve; 23. liquid outlet pipe; 24. second solenoid valve; 25. stirring blade; 26. universal joint; 27. pump box. DETAILED DESCRIPTION

[0049] The following is further described in detail through specific implementation methods:

[0050] Embodiment 1:

[0051] As attached Figure 1-Figure 6 As shown: a rotary grouting device based on MICP solidified soil, including a grouting vehicle, the grouting vehicle includes a vehicle body 1 and a controller, a through hole is opened at the bottom of the vehicle body 1, a grouting box 2 is fixedly connected to the top of the vehicle body 1 by bolts, and the bottom of the grouting box 2 is connected to the through hole.

[0052] The grouting box 2 is provided with a grouting assembly for rotational grouting of the soil; the grouting assembly includes a first rotating shaft 3 and a grouting cylinder 4; the top end of the first rotating shaft 3 passes through the top wall of the grouting cylinder 4 and is rotatably connected to the top wall of the grouting cylinder 4; the grouting cylinder 4 is fixedly connected with an inclined driving seat 5 by bolts, and the bottom of the inclined driving seat 5 is rotatably connected with a driven disk 6; the first rotating shaft 3 passes through the driving seat 5 and is rotatably connected to the driving seat 5; the driven disk 6 and the first rotating shaft 3 are coaxially integrally formed.

[0053] The bottom wall of the grouting barrel 4 is rotatably matched with a liquid injection plate 7, and a plurality of liquid injection cavities 8 are opened on the liquid injection plate 7 along its circumference. The liquid injection cavities 8 are vertically slidably matched with a push plate 9, and the push plate 9 is ball-hinged at the bottom of the driven plate 6, and the end of the push plate 9 away from the liquid injection cavity 8 is ball-hinged with the bottom of the inclined driving seat 5; at least two grouting holes 10 are opened at the bottom of the grouting barrel 4, and a plurality of liquid inlet channels 11 are opened at the bottom of the grouting barrel 4, and the liquid inlet channels 11 are arranged one-to-one corresponding to the grouting holes 10 and are connected to each other.

[0054] A driving box 12 is fixedly connected to the top of the grouting box 2 by bolts, and a liquid storage tank 13 is fixedly connected to the top of the driving box 12 by bolts. The interior of the liquid storage tank 13 is divided into liquid storage chambers arranged adjacent to each other in the upper and lower parts. A driving member 14 is fixedly connected to the top of the liquid storage tank 13 by bolts. The controller is used to control the operation of the driving member 14. The output shaft of the driving member 14 passes through the top wall of the liquid storage tank 13 and extends into the liquid storage tank 13 and is fixedly welded with a first connecting shaft 15. A stirring component for stirring the bacterial liquid or the cementing liquid in the liquid storage tank 13 is provided on the first connecting shaft 15; an angle-adjustable transmission component is provided between the first rotating shaft 3 and the first connecting shaft 15.

[0055] The stirring assembly includes a plurality of stirring blades 25 , and the stirring blades 25 are fixedly welded to the outer side wall of the first connecting shaft 15 .

[0056] The bottom of the liquid storage box 13 is connected with a plurality of liquid delivery pipes, and the ends of the liquid delivery pipes away from the liquid storage box 13 are all connected with the liquid inlet channel 11, and the liquid inlet channel 11 is connected with a one-way valve 16.

[0057] The bottom end of the first connecting shaft 15 passes through the bottom wall of the liquid storage box 13 and the top wall of the driving box 12 and extends into the driving box 12. The bottom end of the first connecting shaft 15 is provided with a telescopic component for driving the transmission component to telescope.

[0058] The telescopic assembly includes a spline shaft 17, the top end of the spline shaft 17 and the bottom end of the first connecting shaft 15 are integrally formed, and a plurality of spline grooves are opened on the outside of the spline shaft 17; a telescopic cylinder 18 is sleeved on the outside of the spline shaft 17, and a second connecting shaft 19 is integrally formed on the bottom end of the telescopic cylinder 18; the top wall of the telescopic cylinder 18 and the spline grooves are vertically slidably matched; a slide 20 is sleeved on the telescopic cylinder 18 and vertically slidably matched, and the top end of the slide 20 and the inner top wall of the drive box 12 are fixedly connected by bolts; the top of the spline shaft 17 passes through the top wall of the slide 20 and rotates with the top wall of the slide 20, and a telescopic control assembly for driving the telescopic cylinder 18 to telescope on the spline shaft 17 is provided on the top of the slide 20.

[0059] The telescopic control component includes a liquid inlet pipe 21, which is connected to the top of the slide cylinder 20, and a first solenoid valve 22 is connected inside the liquid inlet pipe 21, and a controller is used to control the opening and closing of the first solenoid valve 22; the end of the liquid inlet pipe 21 away from the slide cylinder 20 is connected to a positive hydraulic system; the top of the slide cylinder 20 is also connected to a liquid outlet pipe 23, and a second solenoid valve 24 is connected inside the liquid outlet pipe 23, and the controller is used to control the opening and closing of the second solenoid valve 24, and the end of the liquid outlet pipe 23 away from the slide cylinder 20 is connected to a negative hydraulic system.

[0060] A pump box 27 is also fixedly connected to the top of the vehicle body 1 by bolts, and a hydraulic pump assembly is fixedly connected to the inner bottom wall of the pump box 27. The controller is used to control the opening and closing of the hydraulic pump assembly, and the output end of the hydraulic pump assembly is connected to both the positive hydraulic system and the negative hydraulic system.

[0061] The transmission assembly includes a universal joint 26 , the top end of the universal joint 26 is fixedly welded to the bottom end of the second connecting shaft 19 , and the bottom end of the universal joint 26 is fixedly welded to the top end of the first rotating shaft 3 .

[0062] The grouting hole 10 is in a C shape.

[0063] The specific implementation process is as follows:

[0064] First, add bacterial liquid or cementing liquid into the liquid storage tank 13 through the infusion tube, drive the grouting vehicle to the area to be grouting, ensure that the grouting vehicle is parked stably, and align the grouting tube 4 with the grouting point.

[0065] Afterwards, the stones and weeds around the grouting point are cleared, and then the staff uses the universal joint 26 to adjust the angle of the grouting barrel 4 to be perpendicular to the soil according to the slope of the grouting area. Then, the staff starts the hydraulic pump assembly through the controller. In this embodiment, the hydraulic pump assembly is a positive and negative pressure pump.

[0066] Since the output ends of the positive and negative pressure pumps are connected to both the positive hydraulic system and the negative hydraulic system, the staff can now start the extension function of the telescopic assembly.

[0067] by Figure 5 and Figure 6 For example, when the extension function is started, the controller sends a control signal to control the first solenoid valve 22 to open and the second solenoid valve 24 to close; since the first solenoid valve 22 is connected to the liquid inlet pipe 21, the liquid inlet pipe 21 is connected to the top of the slide 20, and the left end of the liquid inlet pipe 21 is connected to the positive hydraulic system, at this time, the positive pressure output by the positive and negative pressure pumps can enter the inside of the slide 20 from the liquid inlet pipe 21 through the positive hydraulic system, and then push the telescopic cylinder 18 to extend downward in the slide 20. Since the bottom end of the telescopic cylinder 18 and the second connecting shaft 19 are integrally formed, the top end of the universal joint 26 is fixedly welded to the bottom end of the second connecting shaft 19, and the bottom end of the universal joint 26 is fixedly welded to the first connecting shaft 19. At the top of a rotating shaft 3, the telescopic cylinder 18 can drive the second connecting shaft 19 and then drive the universal joint 26 and then drive the first rotating shaft 3 to extend downward. At this time, the first rotating shaft 3 extends downward and then drives the grouting cylinder 4 to extend downward, so that the grouting hole 10 at the bottom of the grouting cylinder 4 can fit closely to the soil surface of the area to be reinforced. At the same time, the staff can adjust the angle of the grouting cylinder 4 by adjusting the angle of the universal joint 26 to ensure that the bottom of the grouting cylinder 4 remains vertical to the soil surface to adapt to the soil surface of different grouting reinforcement areas. When the grouting hole 10 at the bottom of the grouting cylinder 4 fits closely to the soil surface of the grouting reinforcement area, the grouting operation starts.

[0068] The staff starts the driving member 14 through the controller. In this embodiment, the driving member 14 is a reduction motor. Since the first connecting shaft 15 and the output shaft of the reduction motor are fixedly welded, the output shaft of the reduction motor can drive the first connecting shaft 15 to rotate. Since the stirring blades 25 are fixedly welded to the outer wall of the first connecting shaft 15, the first connecting shaft 15 can drive the stirring blades 25 to rotate to fully stir the bacterial liquid or the cementing liquid in the liquid storage tank 13 to ensure that the bacterial liquid or the cementing liquid is uniform and has no precipitation.

[0069] At this time, the first connecting shaft 15 can drive the spline shaft 17 and then drive the second connecting shaft 19 to rotate. The rotation of the second connecting shaft 19 drives the universal joint 26 to rotate and then drives the first rotating shaft 3 to rotate.

[0070] At this time, the rotation of the first rotating shaft 3 can drive the driven disk 6 to rotate at the bottom of the inclined driving seat 5; since the liquid injection disk 7 rotates in cooperation with the bottom wall of the grouting tube 4, when the liquid injection disk 7 rotates, due to the inclined design of the bottom of the inclined driving seat 5, the rotation of the inclined driving seat 5 can drive the pushing disk 9 to move back and forth, thereby making the pushing disk 9 move back and forth up and down in the liquid injection chamber 8, thereby changing the air pressure in the liquid injection chamber 8.

[0071] by Figure 3 For example, since the liquid inlet channel 11 is connected to the adjacent grouting hole 10, when the push plate 9 on the right side of the liquid injection plate 7 moves upward, the push plate 9 on the left side moves downward. Figure 3 The injection cavity 8 on the upper right side can suck the gas in the soil into the injection cavity 8. At the same time, since the liquid inlet channel 11 and the liquid storage tank 13 are connected through the liquid delivery pipe, the bacterial liquid or cementing liquid in the liquid storage tank 13 can also be sucked into the injection cavity 8 for storage. At the same time, the bacterial liquid or cementing liquid in the injection cavity 8 on the left side can be squeezed into the soil as the push disk 9 moves downward. At the same time, the one-way valve 16 connected in the liquid inlet channel 11 can prevent the bacterial liquid or cementing liquid from flowing back. Under the suction effect of the upward movement of the push disk 9 on the right side of the injection disk 7, the bacterial liquid or cementing liquid in the left side can be squeezed into the soil as the push disk 9 moves downward. The bacterial liquid or cementing liquid injected can move to the right along the gap in the soil under the action of suction. Similarly, when the push plate 9 on the right side of the liquid injection plate 7 moves downward, the above process is repeated; when the inclined driving seat 5 rotates one circle, the grouting tube 4 can realize the all-round and multi-angle injection of the bacterial liquid or cementing liquid while sucking the air in the soil to control the flow direction of the bacterial liquid or cementing liquid in the soil, which effectively solves the problem that the flow direction of the bacterial liquid or cementing liquid is difficult to control and it is difficult to fully cover the soil at the grouting position in the traditional grouting method.

[0072] The present invention takes the effect of air suction into consideration in the design of the grouting tube 4. When the bacterial liquid or cementing liquid is sprayed out from the grouting hole 10, the grouting hole 10 opposite to the grouting hole 10 spraying the bacterial liquid or cementing liquid will form a low-pressure area in the soil, thereby attracting the grouting hole 10 spraying the bacterial liquid or cementing liquid to move to the area; this air suction effect not only helps to further control the flow direction of the bacterial liquid or cementing liquid, but also promotes the full contact and mixing of the bacterial liquid or cementing liquid with soil particles, thereby improving the effect of grouting reinforcement.

[0073] After grouting is completed in a soil reinforcement area, the staff can now activate the retraction function of the telescopic component.

[0074] The controller sends a control signal to control the first solenoid valve 22 to close and the second solenoid valve 24 to open. At this time, the negative pressure output by the positive and negative pressure pumps can suck out the hydraulic oil inside the slide 20 from the liquid outlet pipe 23 through the negative hydraulic system, and then retract the telescopic cylinder 18 upward in the slide 20, thereby driving the grouting cylinder 4 to retract. At this time, the staff can operate the grouting vehicle to move to the next soil reinforcement area to continue the grouting operation.

[0075] Embodiment 2:

[0076] The difference from Example 1 is that the method for using the rotary grouting device based on the MICP solidified soil body comprises the following steps:

[0077] Step 1: Drive the grouting vehicle to the area to be grouted, inject bacterial liquid or cementing liquid into the liquid storage chamber according to different grouting modes, and clean the impurities on the surface of the area to be grouted.

[0078] Step 2: Control the telescopic assembly to operate through the controller so that the grouting tube 4 is in effective contact with the surface of the grouting area.

[0079] Step three, the driving member 14 is controlled to operate through the controller, and the output shaft of the driving member 14 drives the first connecting shaft 15 and the stirring assembly to rotate. During the rotational grouting process, the stirring assembly continuously stirs the bacterial liquid or the binder in the liquid storage tank 13; at the same time, the grouting assembly outputs the bacterial liquid and the binder alternately in a cycle, or the grouting assembly outputs the bacterial liquid or the binder repeatedly in a cycle until the grouting at a certain position in the grouting area is completed.

[0080] Step 4, after completing grouting at a certain position in the grouting area, adjust the angle of the grouting tube 4, and repeat steps 2 and 3 until grouting is completed at all positions in the grouting area.

[0081] The grouting modes include synchronous grouting mode and step-by-step grouting mode.

[0082] When the synchronous grouting mode is adopted, the bacterial liquid is injected into any one liquid storage chamber, and the cementing liquid is injected into the other liquid storage chamber, and the liquid inlet channel on one side is connected with the liquid storage chamber storing the bacterial liquid, and the liquid inlet channel on the other side is connected with the liquid storage chamber storing the cementing liquid, and then the controller controls the operation of the driving member 14, and the bacterial liquid and the cementing liquid are continuously and alternately output in a cycle on one side of the bottom of the grouting barrel 4.

[0083] When the step-by-step grouting mode is adopted, the bacterial liquid is first injected into the two liquid storage chambers, and then the controller controls the driving member 14 to operate, and the bottom side of the grouting tube 4 continuously and repeatedly outputs the bacterial liquid in a cycle; after the bacterial liquid is injected, the binder liquid is injected into the two liquid storage chambers, and then the controller controls the driving member 14 to operate, and the bottom side of the grouting tube 4 continuously and repeatedly outputs the binder liquid in a cycle.

[0084] Embodiment 3:

[0085] The difference from the second embodiment is that the top of the liquid storage tank 13 is connected with a liquid infusion tube.

[0086] The specific implementation process is as follows: the infusion tube can facilitate the staff to add bacterial liquid or cementing liquid into the liquid storage box 13.

[0087] Embodiment 4:

[0088] The difference from Example 3 is that a liquid level sensor is fixedly connected to the inner wall of the liquid storage tank 13 by screws, and the controller is used to receive a liquid level signal in the liquid storage tank 13 sent by the liquid level sensor.

[0089] The specific implementation process is as follows: the liquid level sensor can collect the liquid level information of the bacterial liquid or binder in the liquid storage tank 13 in real time, and send the liquid level information to the controller. When the bacterial liquid or binder in the liquid storage tank 13 is insufficient, the controller sends a control signal to control the reduction motor to turn off to stop grouting, so that the staff can replenish the bacterial liquid or binder through the infusion tube in time.

[0090] Embodiment 5:

[0091] like Figure 3 As shown, the difference from Example 4 is that the grouting holes 10 are fixedly connected by screws and connected with a telescopic sleeve, the bottom of the telescopic sleeve is integrally formed and connected with a grouting nozzle, and the telescopic sleeve is connected with the grouting hole.

[0092] The specific implementation process is as follows: when the bacterial liquid or the cementing liquid is injected into the soil in the grouting area through the grouting hole 10, the telescopic sleeve can extend toward the soil and be inserted into the soil through the grouting nozzle due to its telescopic characteristics as the bacterial liquid or the cementing liquid is injected, so that the bacterial liquid or the cementing liquid is further stably injected into the soil, avoiding the waste of the bacterial liquid or the cementing liquid. At the same time, when the grouting hole 10 is suctioned, the telescopic sleeve can contract and extend for the next time.

[0093] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A rotary grouting device based on MICP solidified soil, comprising a grouting vehicle, characterized in that: The grouting vehicle comprises a vehicle body (1) and a controller. A through hole is provided at the bottom of the vehicle body (1). A grouting box (2) is fixedly connected to the top of the vehicle body (1). The bottom of the grouting box (2) is connected to the through hole. A grouting assembly for performing rotary grouting on soil is provided in the grouting box (2); the grouting assembly comprises a first rotating shaft (3) and a grouting cylinder (4); the top end of the first rotating shaft (3) passes through the top wall of the grouting cylinder (4) and is rotatably connected to the top wall of the grouting cylinder (4); an inclined driving seat (5) is fixedly connected inside the grouting cylinder (4); a driven disk (6) is rotatably connected to the bottom of the inclined driving seat (5); the first rotating shaft (3) passes through the driving seat (5) and is rotatably connected to the driving seat (5); the driven disk (6) and the first rotating shaft (3) are coaxially fixedly connected; The bottom wall of the grouting cylinder (4) is rotatably matched with a liquid injection plate (7), and a plurality of liquid injection cavities (8) are formed on the liquid injection plate (7) along its circumference. A push plate (9) is vertically slidably matched in each of the liquid injection cavities (8). The push plate (9) is ball-jointed at the bottom of the driven plate (6), and one end of the push plate (9) away from the liquid injection cavity (8) is ball-jointed with the bottom of the inclined driving seat (5); at least two grouting holes (10) are formed at the bottom of the grouting cylinder (4), and a plurality of liquid inlet channels (11) are formed at the bottom of the grouting cylinder (4), and the liquid inlet channels (11) are arranged one by one with the grouting holes (10) and are connected to each other; The top of the grouting box (2) is fixedly connected to a driving box (12), the top of the driving box (12) is fixedly connected to a liquid storage box (13), the interior of the liquid storage box (13) is divided into liquid storage chambers arranged adjacent to each other in the upper and lower parts, the top of the liquid storage box (13) is fixedly connected to a driving member (14), a controller is used to control the operation of the driving member (14), the output shaft of the driving member (14) passes through the top wall of the liquid storage box (13) and extends into the liquid storage box (13) and is fixedly connected to a first connecting shaft (15), the first connecting shaft (15) is provided with a stirring component for stirring the bacterial liquid or the cementing liquid in the liquid storage box (13); a transmission component with an adjustable angle is provided between the first rotating shaft (3) and the first connecting shaft (15); The bottom of the liquid storage box (13) is connected to a plurality of liquid delivery pipes, and the ends of the liquid delivery pipes away from the liquid storage box (13) are all connected to the liquid inlet channel (11), and the liquid inlet channel (11) is connected to a one-way valve (16); The bottom end of the first connecting shaft (15) passes through the bottom wall of the liquid storage box (13) and the top wall of the driving box (12) and extends into the driving box (12). The bottom end of the first connecting shaft (15) is provided with a telescopic component for driving the transmission component to telescope.

2. The rotary grouting device based on MICP solidified soil according to claim 1 is characterized in that: The telescopic assembly comprises a spline shaft (17), the top end of the spline shaft (17) is fixedly connected to the bottom end of the first connecting shaft (15), and a plurality of spline grooves are formed on the outer side of the spline shaft (17); a telescopic cylinder (18) is sleeved on the outer side of the spline shaft (17), and a second connecting shaft (19) is fixedly connected to the bottom end of the telescopic cylinder (18); the top wall of the telescopic cylinder (18) and the spline grooves are both vertically slidably matched; a slide cylinder (20) is sleeved on the telescopic cylinder (18) and vertically slidably matched, and the top end of the slide cylinder (20) is fixedly connected to the inner top wall of the driving box (12); the top of the spline shaft (17) passes through the top wall of the slide cylinder (20) and is rotatably matched with the top wall of the slide cylinder (20), and a telescopic control assembly for driving the telescopic cylinder (18) to telescope on the spline shaft (17) is provided on the top of the slide cylinder (20).

3. The rotary grouting device based on MICP solidified soil according to claim 2, characterized in that: The telescopic control component comprises a liquid inlet pipe (21), the liquid inlet pipe (21) is connected to the top of the slide cylinder (20), a first solenoid valve (22) is connected in the liquid inlet pipe (21), and a controller is used to control the opening and closing of the first solenoid valve (22); an end of the liquid inlet pipe (21) away from the slide cylinder (20) is connected to a positive hydraulic system; the top of the slide cylinder (20) is also connected to a liquid outlet pipe (23), a second solenoid valve (24) is connected in the liquid outlet pipe (23), and the controller is used to control the opening and closing of the second solenoid valve (24), and an end of the liquid outlet pipe (23) away from the slide cylinder (20) is connected to a negative hydraulic system.

4. The rotary grouting device based on MICP solidified soil according to claim 3 is characterized in that: The stirring assembly comprises a plurality of stirring blades (25), and the stirring blades (25) are all fixedly connected to the outer side wall of the first connecting shaft (15).

5. The rotary grouting device based on MICP solidified soil according to claim 4, characterized in that: The transmission assembly comprises a universal joint (26), the top end of the universal joint (26) is fixedly connected to the bottom end of the second connecting shaft (19), and the bottom end of the universal joint (26) is fixedly connected to the top end of the first rotating shaft (3).

6. The rotary grouting device based on MICP solidified soil according to claim 5, characterized in that: The top of the vehicle body (1) is also fixedly connected to a pump box (27), the inner bottom wall of the pump box (27) is fixedly connected to a hydraulic pump assembly, the controller is used to control the opening and closing of the hydraulic pump assembly, and the output end of the hydraulic pump assembly is connected to both the positive hydraulic system and the negative hydraulic system.

7. The rotary grouting device based on MICP solidified soil according to claim 1, characterized in that: The top of the liquid storage box (13) is connected to a liquid infusion pipe; the grouting hole (10) is in a C-shape.

8. The rotary grouting device based on MICP solidified soil according to claim 1, characterized in that: A liquid level sensor is fixedly connected to the inner wall of the liquid storage tank (13), and the controller is used to receive a liquid level signal in the liquid storage tank (13) sent by the liquid level sensor.

9. A method for using a rotary grouting device based on MICP solidified soil, based on the rotary grouting device of MICP solidified soil according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Drive the grouting vehicle to the area to be grouted, inject bacterial liquid or cementing liquid into the liquid storage chamber according to different grouting modes, and clean the impurities on the surface of the area to be grouted; Step 2, controlling the telescopic assembly to operate through a controller so that the grouting tube (4) is in effective contact with the surface of the grouting area; Step three, the controller controls the driving member (14) to operate, and the output shaft of the driving member (14) drives the first connecting shaft (15) and the stirring component to rotate. During the rotational grouting process, the stirring component continuously stirs the bacterial liquid or the cementing liquid in the liquid storage tank (13); at the same time, the grouting component outputs the bacterial liquid and the cementing liquid alternately in a cycle, or the grouting component outputs the bacterial liquid or the cementing liquid repeatedly in a cycle until the grouting of a certain position in the grouting area is completed; Step 4, after grouting at a certain position in the grouting area is completed, the angle of the grouting tube (4) is adjusted, and steps 2 and 3 are repeated until grouting at all positions in the grouting area is completed.

10. The method for using the rotary grouting device based on MICP solidified soil according to claim 9, characterized in that: The grouting modes include synchronous grouting mode and step-by-step grouting mode; When the synchronous grouting mode is adopted, the bacterial liquid is injected into any one liquid storage chamber, and the cementing liquid is injected into the other liquid storage chamber, and the liquid inlet channel on one side is connected with the liquid storage chamber storing the bacterial liquid, and the liquid inlet channel on the other side is connected with the liquid storage chamber storing the cementing liquid, and then the controller controls the driving part to operate, and the bacterial liquid and the cementing liquid are continuously and alternately outputted in a cycle at one side of the bottom of the grouting barrel; When the step-by-step grouting mode is adopted, the bacterial liquid is first injected into both liquid storage chambers, and then the controller controls the driving component to operate, and the bottom side of the grouting barrel continuously and repeatedly outputs the bacterial liquid; after the bacterial liquid is injected, the cementing liquid is injected into both liquid storage chambers, and then the controller controls the driving component to operate, and the bottom side of the grouting barrel continuously and repeatedly outputs the cementing liquid.

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