A slurry instant mixing self-drilling and grouting device and a method of using the same

Abstract

The application discloses a slurry instant mixing self-drilling type anchor grouting device and a use method thereof, and belongs to the field of roadway, tunnel and tunnel underground engineering support. The device comprises an anchoring part, a drilling driving part and a grouting part. The anchoring part is composed of an anchor rod main body and a rock-soil breaking drill bit. The drilling driving part is composed of an electric motor A and a rod shaft. The anchor rod main body is driven to advance by the rotation shaft and the electric motor A to further realize drilling-anchor integrated operation. The grouting part comprises a feeding vessel, and the slurry instant mixing function can be realized under the action of a stirrer. The drilling-anchor-grouting integrated operation can be realized by matching the anchoring part and the drilling driving part. The device has the advantages of multiple functions, reasonable structure, time saving and high efficiency, and economic applicability.

Description

Technical Field

[0001] This invention relates to the field of underground engineering support for roadways, tunnels and culverts, and is a self-drilling anchoring device for instant grout mixing and its application method. Background Technology

[0002] In underground engineering operations such as tunnels and culverts, workers must navigate complex and hazardous geological environments, including unstable strata, groundwater flow, and geological faults. These environments can pose potential threats and impacts to the safety and stability of construction and operation. To ensure smooth construction and operation, anchor bolt support and grouting reinforcement technologies have emerged and are widely used. Anchor bolt support technology secures the support structure within the underground borehole, forming a support system through anchoring, effectively reducing strata deformation and displacement, and ensuring worker safety and the bearing capacity of the surrounding rock. Grouting reinforcement technology injects grouting material into the underground construction area to fill fissures, reinforce the foundation, and improve the geological structure, thereby enhancing strata stability and improving the safety of construction and mining.

[0003] In practical engineering, traditional anchor bolt support technology and grouting reinforcement technology have revealed the following problems: First, when drilling in weak surrounding rock, the problem of borehole collapse often occurs, that is, after the pre-drilled borehole is constructed, the surrounding rock mass collapses and fills and blocks the borehole. In order to solve the problems of borehole collapse and blockage in anchor bolt drilling, slotted pipe anchors can be used in underground engineering support. However, slotted pipe anchors are hollow flat structures, and the strength of the rod itself is relatively low. In actual engineering, they are easily broken and fail, thus losing their support function for the surrounding rock. Second, at present, the reinforcement of weak surrounding rock mainly adopts sleeve valve grouting and grouting pipe grouting methods. The grout parameters (such as density and fluidity) remain unchanged throughout the grouting process. Furthermore, when selecting cement grout or choosing a two-component grout type, the grout is pre-mixed outdoors before injection. Although the two-component grout is uniformly mixed in this case, premature mixing reduces the grout's fluidity. Thirdly, in underground engineering operations such as roadways, tunnels, and culverts, whether grouting is performed before or after installing anchor bolts (cables), the entire process is extremely cumbersome. Taking prestressed grouting anchor cables as an example, the entire construction process includes drilling, hole cleaning, anchor cable installation, grouting, anchor installation, anchor tensioning, and hole sealing grouting, involving numerous procedures and consuming significant manpower and resources.

[0004] Based on the above problems, there is an urgent need to develop an anchoring and injection device that can solve the problems of hole collapse and blockage, enable instant slurry mixing and real-time parameter control, and combine drilling, anchoring and injection to simplify the process. That is, an anchoring and injection device that integrates self-propelled drilling and anchoring, instant slurry mixing and real-time parameter control functions to solve the existing engineering and technical problems. Summary of the Invention

[0005] Technical problem: To address the shortcomings of existing technologies, a self-drilling anchoring device for instant slurry mixing and its usage method are provided. This device can not only self-drill and anchor to solve the problems of hole collapse and blockage, but also enable instant slurry mixing and real-time parameter control, and realize integrated drilling-anchoring-injection operations.

[0006] Technical solution: To achieve the above technical objectives, the present invention provides a self-drilling anchoring device for instant grout mixing, comprising an anchoring part, a drilling drive part, and a grouting part. The drilling drive part is connected to the anchoring part during anchoring construction to complete the anchoring construction and is then disassembled. The subsequently installed anchoring part is connected to the grouting part through a pipeline and grouting construction is carried out.

[0007] The anchoring part includes a hollow anchor body with a rock-breaking drill bit at the end. The rock-breaking drill bit has two cutter heads along the circumference of the cross-section for cutting the rock and soil on the surrounding rock. The cutter heads have an arc-shaped structure, and a gap is left between the two cutter heads to allow the cut rock and soil fragments to enter the anchor body. A slag discharge port is opened on the side wall of the tail end of the anchor body to discharge the rock and soil fragments. A rod shaft is provided inside the anchor body, and the rod shaft is equipped with rock and soil teeth for moving the rock and soil fragments that enter the anchor body.

[0008] The drilling drive unit includes a support box, with a handle for gripping on the outside of the support box, and a gear disk device with a planetary gear structure and an electric motor A on the inside of the support box. The electric motor A is connected to the anchor body and the rod shaft respectively through the gear disk device, and provides power for the anchor body and the rod shaft to rotate in opposite directions.

[0009] Furthermore, the planetary gear structure includes a driving gear that serves as a sun gear. The driving gear is connected to the output shaft of the motor A and the rod shaft. Around the driving gear, an outer gear disc that serves as an external gear ring is connected to multiple driven gears that serve as planetary pinions. The surface of the outer gear disc is connected to the pin holes at the tail of the anchor rod body through multiple cylindrical pins. Four to six driven gears are arranged at equal intervals. The driven gears are fixed inside the support box by pins, so that when the driving gear provides power, it drives the outer gear disc to rotate in the opposite direction to the driving gear.

[0010] Furthermore, the grouting section includes a grouting tank, which is equipped with a flowability funnel tester for detecting the mixing of internal materials, a feeding vessel A and a feeding vessel B for adding two materials, and a motor housing A at the bottom of the grouting tank. The motor housing A has a start button and a stop button. The grouting tank contains a stirrer powered by the motor housing A. The grout outlet of the grouting tank is connected to a pressure-boosting sleeve through a grouting channel. The grouting channel has a valve switch. The pressure-boosting sleeve is connected to a motor housing B, which has a motor start / stop button and a motor speed adjustment button. The speed of the pressure turbine is adjusted by turning the speed adjustment button, thereby further controlling the grouting pressure. The pressure-boosting sleeve contains a pressure turbine driven by the motor housing B. The outlet of the pressure-boosting sleeve is connected to a grouting hose through a grouting steel pipe. The grouting steel pipe is equipped with a pressure flow meter.

[0011] Furthermore, the drill bit is bolted to the end of the anchor bolt body; the support box is equipped with a start / stop button for motor A and a speed button for motor A.

[0012] A method for using a self-drilling anchoring device for instant slurry mixing, comprising the following steps:

[0013] The rock-breaking drill bit is fixed to the anchor rod body with bolts, the rod shaft is connected to the drive wheel of the gear disk device, the anchor rod body is connected to the outer wheel disk, and the two are installed with cylindrical pins.

[0014] Motor A is started using the start / stop button, and the rotational speed of the shaft is adjusted using the speed button on Motor A.

[0015] Motor A drives the rod shaft and the driving wheel to rotate clockwise. The driving wheel drives the outer wheel to rotate counterclockwise through the driven wheel, thereby realizing that the anchor rod body and the driving rod shaft rotate in opposite directions.

[0016] The rock and soil breaking drill bit set at the end of the anchor rod body drills a self-advancing anchor hole at a preset position in the surrounding rock. The rock and soil breaking drill bit cuts the rock and soil fragments and enters the anchor rod body through the area between the two cutter heads. Because the anchor rod body and the rotating shaft rotate in opposite directions, the rock and soil breaking teeth push the rock and soil fragments to the tail of the anchor rod body and discharge them through the slag discharge port.

[0017] After the anchor body is drilled to the preset depth, turn off motor A and pull out the anchoring part. Install the tray and anti-slip nut in sequence on the part of the anchor body exposed outside the anchor hole using threads.

[0018] Connect the grouting hose to the end of the anchor bolt body that is exposed outside the hole, and start the grouting process to reinforce the surrounding rock.

[0019] When grouting reinforcement is required, firstly, add grout mixture A and B to feeding container A and feeding container B respectively, and then feed mixture A and B enter the grouting pool through pipes;

[0020] Start the motor box A to drive the stirrer to rotate and stir. After it is stirred evenly, use a flowability funnel tester to monitor the flowability in real time.

[0021] Open the valve switch to allow the grout to enter the pressurizing sleeve through the grouting channel. Then, the motor in motor box B drives the pressurizing turbine to rotate. The speed of the pressurizing turbine can be adjusted by turning the speed adjustment button to further regulate the grouting pressure.

[0022] The injection pressure and flow rate in the grouting steel pipe are monitored in real time by a pressure flow meter installed on the grouting steel pipe.

[0023] After grouting is completed, sealing plugs are installed at the ends of the anchor bolt body and at the slag discharge port.

[0024] Furthermore, depending on different grouting requirements, different materials and slurries can be added to feeder A and feeder B. When a two-component slurry is selected, it can also be visually and instantly mixed and injected on-site, thus avoiding the problem of reduced slurry fluidity caused by premature mixing. In summary, this device realizes integrated drilling-anchoring-grouting operations.

[0025] Beneficial Effects: Due to the adoption of the above technical solution, this invention combines the functions of self-propelled drilling and anchoring with real-time mixing and parameter control of the injected grout. Its beneficial effects are undeniable: 1) It effectively solves the problems of borehole collapse and blockage in actual underground engineering drilling construction; 2) It allows for real-time mixing of the grout on-site, ensuring its fluidity, and the grout parameters and injection pressure can be controlled in real time; 3) The drilling, anchoring, and grouting parts coordinate with each other, simplifying the construction process and saving significant manpower and resources. The rotating shaft and motor A drive the anchor body to break through the rock and soil, further realizing integrated drilling-anchoring operations; different grouts and materials can be instantly mixed under the action of the mixer, and combined with the anchoring and drilling drive parts, integrated drilling-anchoring-grouting operations can be achieved. The anchoring and grouting device integrates multiple functions, solving the problems of borehole collapse and blockage in actual engineering, addressing the issue of maintaining constant grout parameters (such as density and fluidity) throughout the grouting process in existing grouting methods, and resolving the problem of complex construction procedures at this stage. This invention has a simple structure and stable function, which can greatly improve the efficiency of support and reinforcement and ensure the safety of workers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the anchor hole in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation of the anchoring part in an embodiment of the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of the gear disk device in an embodiment of the present invention;

[0029] Figure 4(a) is a three-dimensional schematic diagram of the drilling drive part in an embodiment of the present invention;

[0030] Figure 4(b) is a three-dimensional schematic diagram of the drilling drive part and the anchoring part in an embodiment of the present invention;

[0031] Figure 5(a) is a three-dimensional schematic diagram of the grouting part in an embodiment of the present invention;

[0032] Figure 5(b) is a three-dimensional schematic diagram of the grouting part in an embodiment of the present invention;

[0033] Figure 6 This is a three-dimensional schematic diagram of a rock-breaking drill bit in an embodiment of the present invention;

[0034] Figure 7 This is a three-dimensional schematic diagram of the supercharger turbine in an embodiment of the present invention.

[0035] In the diagram: 1-surrounding rock, 2-anchor bolt body, 3-plate, 4-anti-slip threaded nut, 5-anchor hole, 6-thread, 7-rod shaft, 8-rock removal teeth, 9-rock breaking drill bit, 10-cutting head, 11-slag discharge port, 12-support box, 13-drive wheel, 14-gear disk device, 15-cylindrical pin, 16-driven wheel, 17-handrail, 18-motor A, 19-motor A start / stop button, 20-motor A speed button, 21-bolt, 22-pin, 23-grouting pool, 24- 25-Agitator, 26-Feeding container A, 27-Feeding container B, 28-Pipeline, 29-Motor box A, 30-Start button, 31-Stop button, 32-Flowability funnel tester, 33-Grouting channel, 34-Valve switch, 35-Motor box B, 36-Motor start / stop button, 37-Motor speed adjustment button, 38-Pressure booster sleeve, 39-Pressure booster turbine, 40-Pressure flow meter, 41-Grouting steel pipe, 42-Grouting hose, 43-Sealing plug, 44-Outer wheel disc. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0037] like Figure 1 and Figure 2As shown, the present invention discloses a self-drilling anchoring device for instant slurry mixing. The anchoring part includes an anchor body 2 with a hollow anchor structure. The end of the anchor body 2 is provided with a rock-breaking drill bit 9. The rock-breaking drill bit 9 has two cutting heads 10 along the circumference of its cross-section for cutting the rock and soil on the surrounding rock 1. The cutting heads 10 have an arc-shaped structure, and a gap is left between the two cutting heads 10 to allow the cut rock and soil fragments to enter the anchor body 2. A slag discharge port 11 is opened on the side wall of the tail end of the anchor body 2 for discharging rock and soil fragments. The rod body 2 is provided with a rod shaft 7, and the rod shaft 7 is provided with rock and soil teeth 8 for moving into the rock and soil crushing inside the anchor rod body 2; as shown in Figures 4(a) and 4(b), the drilling drive part includes a support box 12, the outside of the support box 12 is provided with a handle 17 for gripping, and the inside of the support box 12 is provided with a planetary gear structure gear disk device 14 and a motor A18. The motor A18 is connected to the anchor rod body 2 and the rod shaft 7 respectively through the gear disk device 14, and provides power for the anchor rod body 2 and the rod shaft 7 to rotate in opposite directions.

[0038] like Figure 3 As shown, the gear disk device 14 of the planetary gear structure includes a driving gear 13 serving as a sun gear. The driving gear 13 is connected to the output shaft of the motor A18 and the rod shaft 7. The driving gear 13 is surrounded by four driven gears 16 serving as planetary pinions, which are connected to an outer gear disk 43 serving as an external gear ring. The disk surface of the outer gear disk 43 is connected to the pin holes at the tail of the anchor rod body 2 through multiple cylindrical pins 15. There are 4 to 6 driven gears 16 arranged at equal intervals. The driven gears 16 are fixed inside the support box 12 by pins 22, so that when the driving gear 13 provides power, it drives the outer gear disk 43 to rotate in the opposite direction to the driving gear 13.

[0039] As shown in Figures 5(a) and 5(b), the grouting section consists of a grouting tank 23, a feeding vessel A25, a feeding vessel B26, a flowability funnel measuring instrument 31, a motor housing A28, a motor housing B34, a booster turbine 38, a grouting pipe 32, a pressure flow meter 39, a grouting steel pipe 40, and a grouting hose 41. The feeding vessels A25 and B26 are connected to the grouting tank 23 via pipe 27. The grouting tank 23 is equipped with a stirrer 24, which can instantly mix the two grouts (two materials) during construction. The stirrer 24 is driven to rotate by a motor in the bottom motor housing A28. The grouting tank 23 has a flowability funnel measuring instrument 31 near the bottom to monitor the flowability of the grout in real time. The grout is injected through the grouting channel 32, which is equipped with a valve switch 33.

[0040] The grouting channel 32 is connected to the pressure-boosting sleeve 37, which contains a pressure-boosting turbine 38 driven by a motor in the motor housing B34. The motor housing B34 also has a motor start / stop button 35 and a speed adjustment button 36. The speed of the pressure-boosting turbine 38 is adjusted by turning the speed adjustment button 36, further regulating the grouting pressure. The pressure-boosting sleeve 37 is connected to the grouting steel pipe 40, which is equipped with a pressure flow meter 39. The pressure flow meter 39 can monitor the injection pressure and flow rate in the grouting steel pipe 40 in real time. The grouting steel pipe 40 is connected to the grouting hose 41, which can be pushed into the anchor body 2 after the drilling-anchoring operation to perform grouting, thus realizing an integrated drilling-anchoring-grouting operation.

[0041] like Figure 6 As shown, the rock-breaking drill bit 9 has two cutter heads 10 along the circumference of the cross section. The cutter head 10 is an arc-shaped structure used to cut the rock and soil on the surrounding rock 1. The cut rock and soil fragments enter the anchor rod body 2 through the area between the two cutter heads 10.

Claims

1. A self-drilling anchoring device for instant slurry mixing, characterized in that: It includes an anchoring part, a drilling drive part, and a grouting part. The drilling drive part is connected to the anchoring part during the anchoring construction to complete the anchoring construction and is then disassembled. The anchoring part and the grouting part are then connected through pipelines and grouting construction is carried out. The anchoring part includes a hollow anchor body (2), and the end of the anchor body (2) is provided with a rock-breaking drill bit (9). The rock-breaking drill bit (9) is provided with two cutter heads (10) along the circumference of the cross section for cutting the rock and soil on the surrounding rock (1). The cutter head (10) is an arc-shaped structure, and there is a gap between the two cutter heads (10) to allow the cut rock and soil fragments to enter the anchor body (2). A slag discharge port (11) is opened on the side wall of the tail end of the anchor body (2) for discharging rock and soil fragments. A rod shaft (7) is provided inside the anchor body (2), and a rock and soil tooth (8) is provided on the rod shaft (7) for moving the rock and soil fragments that enter the anchor body (2). The drilling drive includes a support box (12), with a handle (17) for gripping on the outside of the support box (12), and a gear disk device (14) with a planetary gear structure and an electric motor A (18) on the inside of the support box (12). The electric motor A (18) is connected to the anchor body (2) and the rod shaft (7) respectively through the gear disk device (14), and provides power for the anchor body (2) and the rod shaft (7) to rotate in opposite directions. The planetary gear structure of the gear disk device (14) includes a driving wheel (13) that serves as a sun gear. The driving wheel (13) is connected to the output shaft of the motor A (18) and the rod shaft (7). The driving wheel (13) is connected to an outer gear disk (43) that serves as an outer gear ring by multiple driven wheels (16) that serve as planetary pinions. The disk surface of the outer gear disk (43) is connected to the pin holes at the tail of the anchor rod body (2) by multiple cylindrical pins (15). There are 4 to 6 driven wheels (16) arranged at equal intervals. The driven wheels (16) are fixed inside the support box (12) by pins (22), so that when the driving wheel (13) provides power, it drives the outer gear disk (43) to rotate in the opposite direction to the driving wheel (13). The grouting section includes a grouting tank (23), which is equipped with a flowability funnel tester (31) for detecting the mixing of internal materials, a feeding vessel A (25) for adding two materials, and a feeding vessel B (26). The bottom of the grouting tank (23) is equipped with a motor housing A (28), which has a start button (29) and a stop button (30). The grouting tank (23) contains a stirrer (24) powered by the motor housing A (28). The grout outlet of the grouting tank (23) is connected to a pressure-boosting sleeve (37) via a grouting channel (32). A valve switch (33) is provided on the grout channel (32), and a motor box B (34) is connected to the pressure boosting sleeve (37). The motor box B (34) is provided with a motor start / stop button (35) and a motor speed adjustment button (36). The speed of the pressure boosting turbine (38) is adjusted by turning the speed adjustment button (36) to further regulate the grouting pressure. The pressure boosting sleeve (37) is provided with a pressure boosting turbine (38) driven by the motor box B (34). The outlet of the pressure boosting sleeve (37) is connected to a grouting hose (41) through a grouting steel pipe (40). A pressure flow meter (39) is provided on the grouting steel pipe (40). The drill bit (9) is connected to the end of the anchor body (2) by bolts (21); the support box (12) is equipped with a motor A start / stop button (19) and a motor A speed button (20) for controlling the motor A (18). The usage steps are as follows: The rock-breaking drill bit (9) is fixed to the anchor body (2) with bolts (21), the rod shaft (7) is connected to the drive wheel (13) of the gear disk device (14), the anchor body (2) is connected to the outer wheel disk (43), and the two are installed by the column pin (15). Start motor A (18) by using the start / stop button (19) of motor A, and adjust the speed of the rod shaft (7) by using the speed button (20) of motor A; The motor A (18) drives the rod shaft (7) and the driving wheel (13) to rotate clockwise. The driving wheel (13) drives the outer wheel disk (43) to rotate counterclockwise through the driven wheel (16), thereby realizing that the anchor body (2) and the rod shaft (7) rotate in opposite directions. Through the anchor body (2) and the rock-breaking drill bit (9) set at the end, the anchor hole (5) is drilled at the preset position in the surrounding rock (1). The rock and soil fragments cut by the rock-breaking drill bit (9) enter the anchor body (2) through the area between the two cutter heads (10). Because the anchor body (2) and the rod shaft (7) rotate in opposite directions, the rock-breaking teeth (8) push the rock and soil fragments to the tail of the anchor body (2) and discharge them through the slag discharge port (11). After the anchor body (2) is drilled to the preset depth, turn off the motor A (18) and pull out the anchoring part. Install the tray (3) and anti-slip nut (4) in sequence through the thread (6) on the part of the anchor body (2) exposed outside the anchor hole (5). Connect the grouting hose (41) to the end of the anchor body (2) exposed outside the hole, and start the grouting part to grout and reinforce the surrounding rock (1); When grouting reinforcement is required, firstly, add grout mixture A and B to the feeding vessel A (25) and feeding vessel B (26) respectively, and the A and B materials enter the grouting pool (23) through the pipe (27); Start the motor box A (28) to drive the stirrer (24) to rotate and stir. After it is stirred evenly, use the flowability funnel tester (31) to monitor the flowability in real time. Open the valve switch (33) to allow the grout to enter the booster sleeve (37) through the grouting channel (32), and then drive the booster turbine (38) to rotate through the motor in the motor box B (34). Adjust the speed of the booster turbine (38) by turning the speed adjustment button (36) to further regulate the grouting pressure. The injection pressure and flow rate in the grouting steel pipe (40) are monitored in real time by a pressure flow meter (39) installed on the grouting steel pipe (40); After grouting is completed, a sealing plug (42) is installed at the end of the anchor body (2) and at the slag discharge port (11).

2. The self-drilling anchoring device for instant slurry mixing according to claim 1, characterized in that: According to different grouting requirements, different materials and slurries can be added to feeder A (25) and feeder B (26). When the slurry type is selected as a two-liquid slurry, it can also be visualized and injected on site. In summary, the device realizes the integrated operation of drilling-anchoring-grouting.

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