Transverse grouting reinforcement equipment and method for road subgrade

Abstract

The invention relates to the technical field of road maintenance construction, in particular to transverse grouting reinforcement equipment and method for a road subgrade. The drilling assembly is integrated on the vehicle body and comprises a multi-shaft mechanical arm with at least three sections of rotating arms, the multi-shaft mechanical arm is rotationally connected with the vehicle body, and the multi-shaft mechanical arm can drive a spiral drilling rod arranged at the execution end of the multi-shaft mechanical arm to conduct transverse drilling operation at the road slope position; the flexible grouting system comprises a flexible grouting pipe, one end of the flexible grouting pipe is connected with a grout supply device, the other end of the flexible grouting pipe is integrated in the drilling assembly and extends to the execution end of the multi-shaft mechanical arm to be communicated with a spiral drilling rod, and a grouting hole is formed in the front end of the spiral drilling rod; the multi-shaft mechanical arm is matched with the drill rod to realize transverse drilling of the roadbed so as to perform transverse grouting, roadbed grouting reinforcement can be performed under the condition that traffic is not closed, the space of a traffic lane is not occupied in the construction process, and the influence on normal traffic of a road is reduced to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of road maintenance construction, in particular to a device and a method for transverse grouting reinforcement of a road subgrade. Background Art

[0002] Roads have problems such as bridge jumping, roadbed hollowing, uneven settlement, and roadbed subsidence. Grouting reinforcement is a non-excavation treatment technology to solve roadbed problems. In the current road maintenance field, vertical grouting reinforcement technology has become a relatively mature reinforcement process after a long period of development and improvement. However, considering the current application effect of vertical grouting reinforcement of roadbed, combined with the current higher requirements for highway operation, vertical grouting reinforcement of roadbed still has the following problems:

[0003] (1) When performing vertical grouting reinforcement of the roadbed, it is necessary to close the road traffic in the grouting area, which is likely to cause traffic congestion, bring safety hazards, and reduce road traffic capacity; for example, the surface ultra-deep hole directional controlled grouting construction method disclosed in the Chinese invention patent with publication number CN113605898A has the above-mentioned disadvantages;

[0004] (2) The slurry of vertical grouting mainly flows in the vertical direction, which mainly tends to improve the bearing capacity of the roadbed soil. Its diffusion in the horizontal direction is relatively limited, and the effect of improving the lateral uneven settlement of the roadbed is poor, which easily leads to uneven reinforcement effect;

[0005] (3) After vertical grouting, the grouting holes on the pavement surface appear point-column shaped, which can easily cause pavement pollution during the construction process. Often, the asphalt surface layer needs to be milled and re-paved after grouting, resulting in a waste of resources. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a roadbed transverse grouting reinforcement device and method, which uses a multi-axis mechanical arm with a spiral drill rod to achieve transverse drilling of the roadbed and then transverse grouting, and can be used for roadbed grouting reinforcement without closing traffic. During the construction process, it is not necessary to occupy the lane space, and the impact on the normal traffic of the road is minimized. In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, the present invention provides a roadbed transverse grouting reinforcement device, comprising:

[0008] Vehicle body;

[0009] A drilling assembly is integrated on the vehicle body, comprising a multi-axis mechanical arm with at least three rotating arms, and the multi-axis mechanical arm is rotatably connected to the vehicle body, and the multi-axis mechanical arm can drive a spiral drill rod provided at its execution end to perform a transverse drilling operation at a road slope position;

[0010] The flexible grouting system comprises a flexible grouting pipe, one end of which is connected to a slurry supply device, and the other end is integrated in a drilling assembly and extends to an execution end of a multi-axis mechanical arm to communicate with an auger rod, wherein a grouting hole is provided at the front end of the auger rod.

[0011] As a further implementation, a grouting assembly is also included, which serves as a slurry supply device and is integrated on the vehicle body. The grouting assembly includes a slurry tank, a slurry storage tank and a grouting pump which are connected in sequence through a pipeline, and the grouting pump is connected to the flexible grouting pipe.

[0012] As a further implementation, a water tank and a material box are provided on the vehicle body, both of which are connected to the pulping tank and supply raw materials thereto.

[0013] As a further implementation method, the flexible grouting system also includes a pressure-stabilizing grouting head and a trustee recovery device. The flexible grouting pipe can be wound around the trustee recovery device. The flexible grouting pipe can be connected to a grouting pump at one end and to a pressure-stabilizing grouting head at the other end. The pressure-stabilizing grouting head is a cylindrical steel pipe with closed ends and grouting holes evenly arranged on the cylindrical surface.

[0014] As a further implementation method, a pressure monitoring device and a valve are provided at one end of the flexible grouting pipe connected to the grouting pump, and the pipe dragging and recovering device is equipped with a motor.

[0015] As a further implementation, it also includes an electric control box for controlling the drilling assembly, the grouting assembly and the flexible grouting system.

[0016] As a further implementation method, the drilling assembly also includes a support column and a support platform rotatably connected thereto, and the multi-axis robotic arm includes a first rotating arm, a second rotating arm and a third rotating arm articulated in sequence and all are configured with a drive, and the first rotating arm is articulated on the support platform.

[0017] As a further implementation method, a drilling power system is installed on the third rotating arm, and the output end of the drilling power system is provided with the spiral drill rod. The tail end of the spiral drill rod is an extension end so that the spiral drill rod can be extended at the extension end after drilling a single section of the spiral drill rod.

[0018] As a further implementation, the drilling assembly further includes a mounting platform, which is connected to the vehicle body via bolts, and the support column is mounted on the mounting platform.

[0019] In a second aspect, the present invention provides a working method of the roadbed transverse grouting reinforcement device according to the first aspect, comprising the following steps:

[0020] The vehicle body is parked on the roadside in the road area where the disease is to be treated, and the multi-axis mechanical arm is operated to drive the spiral drill rod at its execution end to drill horizontal holes in the roadbed slope. After the drilling is completed, the roadbed is horizontally grouted using the segmented tube dragging grouting process; the segmented tube dragging grouting process is specifically: grouting is carried out section by section from the inside to the outside. After the grouting pressure is reached in the previous section, the tube is dragged outward and grouting continues to the next section to ensure that each section is grouted under the same grouting pressure and grouting control parameters until the grouting is completed.

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

[0022] 1. The present invention adopts a multi-axis mechanical arm in conjunction with a spiral drill rod to achieve transverse drilling of the roadbed and then transverse grouting. Compared with conventional vertical grouting, the transverse grouting of the roadbed uses holes at the position of the road slope, and uses high-pressure grouting to inject the slurry into the cavities and gaps inside the roadbed laterally. The roadbed grouting reinforcement can be carried out without closing the traffic. During the construction process, it is not necessary to occupy the driving lane space, which minimizes the impact on the normal traffic of the road. In addition, the transverse grouting adopts a process of drilling holes in the slope and injecting into the interior of the roadbed, which has no effect on the appearance of the existing road surface; the roadbed transverse grouting reinforcement equipment can realize the drilling construction of the slope while the vehicle body is parked on the road, without the need to transport the drilling mechanism to the outside of the slope to drill holes. It is more suitable for some situations where there is not enough space outside the road slope. Workers can control the electric control box on the vehicle body to operate.

[0023] 2. The present invention integrates the drilling assembly, grouting assembly and flexible grouting system into one equipment vehicle, realizing the integrated and automated reinforcement treatment of transverse drilling, grouting and roadbed reinforcement at the roadbed slope position. It reduces the impact on traffic, reduces the investment in personnel and tools, improves construction efficiency, and greatly shortens the construction period.

[0024] 3. The segmented pipe-drag grouting process of the present invention adopts grouting from the inside to the outside. After the grouting pressure of the previous section is reached, the pipe is dragged outward and grouting continues to the next section, ensuring that each section is grouted under approximately the same grouting pressure and grouting control parameters, improving the uniformity and reliability of grouting, and ensuring the reliability of the horizontal grouting filling of the entire roadbed. The process of segmented grouting from the inside to the outside by dragging the pipe can achieve the grouting effect at the deepest part of the borehole without increasing the grouting pressure too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 Schematic diagram of the overall structure of the roadbed transverse grouting reinforcement equipment in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the structure of a drilling assembly in an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of a flexible grouting system in an embodiment of the present invention.

[0029] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0030] Among them: 1. Car body; 11. Car head; 12. Carriage; 13. Wheel; 121. Water tank; 122. Material box; 2. Drilling assembly; 21. Mounting platform; 211. Bolts; 22. Support column; 23. Support platform; 24. First rotating arm; 241. First drive; 242. Second drive; 25. Second rotating arm; 26. Third rotating arm; 261. Third drive; 27. Drilling power system; 28. Electric control box; 29. ​​Auger rod; 3. Grouting assembly; 31. Slurry tank; 32. Slurry storage tank; 33. Grouting pump; 41. Pressure-stabilizing grouting head; 271. Flexible grouting pipe; 43. Drag pipe recovery device; 44. Pressure monitoring device; 45. Valve. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] Embodiment 1

[0033] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a roadbed transverse grouting reinforcement device includes a vehicle body 1, a drilling component 2, a grouting component 3 and a flexible grouting system.

[0034] In this embodiment, the vehicle body 1 includes a vehicle head 11, a vehicle compartment 12, and wheels 13. The drilling assembly 2, the grouting assembly 3, and the flexible grouting system are all integrated in the vehicle compartment 12 on the vehicle body 1. The convenience of the vehicle is utilized to realize the rapid transfer of the construction site, thereby achieving the purpose of rapid and efficient construction.

[0035] The drilling assembly 2 includes a mounting platform 21, a support column 22, a support platform 23, a multi-axis mechanical arm, a drilling power system 27, and an electric control box 28. The multi-axis mechanical arm includes at least three rotating arms, which are set to three sections in this embodiment, specifically a first rotating arm 24, a second rotating arm 25, and a third rotating arm 26.

[0036] like Figure 2As shown, the drilling assembly 2 is installed in the carriage 12 through a mounting platform 21, which is formed by welding steel plates. The mounting platform 21 has sufficient strength, rigidity and stability, and is connected to the vehicle body 1 through bolts 211. A support column 22 is provided on the mounting platform 21, and the top of the support column 22 is used to support a support platform 23, which is rotatably connected to the support column 22. The middle position of the bottom of the support platform 23 can be connected to the driving mechanism through a gear to realize the rotation of the support platform 23. The support platform 23 is formed by welding steel plates and carries a multi-axis mechanical arm and an electric control box 28, thereby realizing drilling in all directions.

[0037] The cooperation of the first rotating arm 24, the second rotating arm 25, the third rotating arm 26, the drilling power system 27 and the electric control box 28 can realize the remote control of horizontal hole drilling. The support platform 23, the first rotating arm 24, the second rotating arm 25, and the third rotating arm 26 are hinged in sequence, and the drilling power system 27 is set at the execution end of the third rotating arm 26, wherein the length of the third rotating arm 26 is at least 1m. The output end of the drilling power system is connected to the spiral drill rod 29.

[0038] The first rotating arm 24, the second rotating arm 25, and the third rotating arm 26 are all equipped with corresponding drives, which are hydraulic rods, cylinders, or electric cylinders. Specifically, the first rotating arm 24 is equipped with a first drive 241, the second rotating arm 25 is equipped with a second drive 242, and the third rotating arm 26 is equipped with a third drive 261. Figure 2 As shown, the two ends of the first drive 241 are respectively hinged to the support platform 23 and one side of the top of the first rotating arm 24; the bottom end of the second drive 242 is hinged to the first rotating arm 24, and the top end is hinged to the front end of the second rotating arm 25. The second drive 242 is located on the side of the first rotating arm 24 away from the first rotating arm 24; the bottom end of the third rotating arm 26 is hinged to the end position of the support platform 23, and the bottom end is hinged to the front end of the third rotating arm 26. Through the mutual cooperation between the first drive 241, the second drive 242 and the third drive 261, the multi-axis robot arm can be U-shaped around the slope to realize horizontal drilling of the roadbed. The support platform 23 rotates relative to the support column to adjust the horizontal drilling direction.

[0039] This embodiment uses a multi-axis mechanical arm with a spiral drill rod 29 to achieve horizontal drilling of the roadbed and then horizontal grouting. Compared with the conventional vertical grouting technology, the horizontal grouting of the roadbed uses a hole at the position of the road slope, and uses high-pressure grouting to inject slurry into the cavities and gaps inside the roadbed in the horizontal direction. During the construction process, it is not necessary to occupy the lane space, minimizing the impact on the normal traffic of the road. In addition, the horizontal grouting adopts a process of drilling holes in the slope and injecting into the roadbed, which has no effect on the appearance of the existing road surface.

[0040] The execution end of the third rotating arm 26 is connected to the auger rod 29 through the drilling power system 27. The tail end of the auger rod 29 is an extension end, so that the auger rod 29 can be extended at the extension end after the single-section auger rod 29 is drilled, thereby realizing long-distance drilling of horizontal holes. It can be understood that when multiple sections of auger rods 29 are spliced, only the front end of the auger rod 29 located at the front end is provided with a grouting hole.

[0041] like Figure 1 As shown, the grouting assembly 3 is used as a slurry supply device and is also integrated on the vehicle body 1. Specifically, the slurry tank 31, the slurry storage tank 32 and the grouting pump 33 are connected in sequence through flexible pipes.

[0042] The pulping tank 31 can pulp and mix the slurry to be injected. The pulping tank 31 is connected to the water tank 121 and the material box 122 through a flexible pipe. It adopts automatic loading and automatic water addition. The program set by the electric control box 28 can directly realize the steps of automatic mixing and discharging.

[0043] The slurry making tank 31 is communicated with the slurry storage tank 32, and the prepared mixed slurry is discharged into the slurry storage tank 32 for storage. One end of the grouting pump 33 is connected to the output end of the slurry storage tank 32, and the output end of the grouting pump 33 is connected to the flexible grouting pipe 271.

[0044] A cylinder pressure regulator and a cylinder pressure gauge are arranged above the cylinder of the grouting pump 33, a grouting port is arranged on the front outer side of the cylinder of the grouting pump 33, a grouting pump main push rod is arranged on the other side of the cylinder assembly, and a grouting pump thrust piston is arranged on the other side of the grouting pump main push rod. The grouting pump 33 injects the mixed slurry into the flexible grouting pipe 271 at a stable pressure.

[0045] like Figure 2 As shown, the flexible grouting system includes a flexible grouting pipe 271, one end of which is connected to the grouting pump 33, and the other end is integrated in the drilling assembly 2, and extends to the execution end of the multi-axis mechanical arm to communicate with the auger rod 29, wherein the front end of the auger rod 29 at the front end is provided with a grouting hole, that is, the front end of the first section of the auger rod 29 is provided with a grouting hole, and the subsequent extended auger rod 29 is not provided with a grouting hole, and the auger rods 29 are connected by threads. It can be understood that the flexible grouting pipe 271 extends into the interior of the support column 22 and passes upward through the support platform 23, passes through the interior of the multi-axis robotic arm and is connected to the end of the auger rod 29 after passing through the drilling power system 27. The auger rod 29 is hollow, so that the auger rod 29 can not only drill holes but also grout. When drilling holes, the water supply mechanism can be connected through the flexible grouting pipe 271 to inject water into the interior of the auger rod 29. When grouting, the grouting pump 33 is connected through the flexible grouting pipe 271 to inject grout into the auger rod 29.

[0046] In other examples, the flexible grouting pipe 271 may not be matched with the drilling assembly 2, such as Figure 3 As shown, the flexible grouting system is composed of a pressure-stabilizing grouting head 41, a flexible grouting pipe 271, a pipe-drawing recovery device 43, a pressure monitoring device 44 and a valve 45. The flexible grouting system can be used to implement the process of lateral grouting from inside to outside by dragging the pipe segment.

[0047] The pressure-stabilizing grouting head 41 is a cylindrical steel pipe with closed ends and grouting holes evenly arranged on the cylindrical surface. The front end of the flexible grouting pipe 271 is connected to the pressure-stabilizing grouting head 41, and a pressure monitoring device 44 and a valve 45 are arranged near the rear end, and the rear end is connected to the grouting pump 33.

[0048] The pipe-drawing recovery device 43 is composed of a cylindrical steel frame and a motor. The flexible grouting pipe 271 is wound around the pipe-drawing recovery device 43. The electric control box 28 automatically controls the rotation of the pipe-drawing recovery device 43 to automatically adjust the pulling speed of the flexible grouting pipe 271, thereby realizing automatic and accurate control of the segmented grouting amount. The pipe-drawing recovery device 43 can be placed in the carriage 12 and located between the grouting pump 33 and the drilling assembly 2.

[0049] The pressure monitoring device 44 and the valve 45 are both automated devices, and the grouting pressure is automatically and accurately controlled by the electric control box 28. The flexible grouting system is controlled by the electric control box 28 to automatically control the grouting amount and grouting pressure, thereby ensuring the reliability of the grouting effect.

[0050] The segmented pipe dragging adopts grouting from the inside to the outside. After the grouting pressure of the previous section is reached, the pipe is dragged outward and grouting continues to the next section to ensure that each section is grouting under roughly the same grouting pressure and grouting control parameters, improving the uniformity and reliability of grouting and ensuring the reliability of the horizontal grouting filling of the entire roadbed. The process of grouting from the inside to the outside by dragging the pipe section can achieve the grouting effect at the deepest part of the borehole without increasing the grouting pressure too much.

[0051] This embodiment integrates the drilling assembly 2, the grouting assembly 3, and the flexible grouting system into one equipment vehicle, realizing the integrated and automated reinforcement treatment of transverse drilling, grouting, and roadbed reinforcement at the roadbed slope. It reduces the impact on traffic, reduces the investment in personnel and tools, improves construction efficiency, and greatly shortens the construction period. The roadbed transverse grouting reinforcement equipment of this embodiment can realize the drilling construction of the slope while the vehicle body is parked on the road, without the need to transport the drilling mechanism to the outside of the slope for drilling, which is more suitable for some situations where there is not enough space outside the road slope.

[0052] Embodiment 2

[0053] This embodiment provides a working method of the roadbed transverse grouting reinforcement device according to the first embodiment, comprising the following steps:

[0054] The vehicle body 1 is parked at a roadside position in the area of ​​the road with defects to be treated, and the multi-axis mechanical arm is operated to drive the drilling power system 27 at its execution end to perform transverse drilling on the roadbed slope. Specifically, the first drive drives the first rotating arm 24 to move, so that the first rotating arm 24 is close to the plane where the support platform 23 is located, close to the horizontal direction, and the second drive drives the second rotating arm 25 to move, so that the second rotating arm 25 moves away from one end of the first rotating arm 24 toward the direction close to the first rotating arm 24, and the third drive 261 drives the third rotating arm 26 to adjust the third rotating arm 26 to the horizontal direction, completing the third rotating arm 26 driving the spiral drill rod from the road to the slope to perform transverse drilling.

[0055] After the drilling is completed, the flexible grouting pipe 271 with a pressure-stabilizing grouting head 41 at the end is then inserted, and the roadbed is horizontally grouted by using the segmented dragging pipe grouting process; the segmented dragging pipe grouting process is specifically: grouting is carried out segment by segment from the inside to the outside, and after the grouting pressure is reached in the previous segment, the pipe is dragged outward, and grouting continues to the next segment, ensuring that each segment is grouted under the same grouting pressure and grouting control parameters until the grouting is completed. During grouting, the flexible grouting pipe 271 can also be connected to the spiral drill rod 29 through the inside of the drilling assembly 2, so that the drilling assembly 2 can both drill holes and grout.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A roadbed transverse grouting reinforcement device, characterized in that: include: Vehicle body; A drilling assembly is integrated on the vehicle body, comprising a multi-axis mechanical arm with at least three rotating arms, and the multi-axis mechanical arm is rotatably connected to the vehicle body, and the multi-axis mechanical arm can be U-shaped to go around the slope position and drive the spiral drill rod provided at its execution end to perform a transverse drilling operation on the slope from the outside of the slope; The flexible grouting system comprises a flexible grouting pipe, one end of which is connected to a slurry supply device, and the other end is integrated in a drilling assembly and extends to an execution end of a multi-axis mechanical arm to communicate with an auger rod, wherein a grouting hole is provided at the front end of the auger rod.

2. A roadbed transverse grouting reinforcement device according to claim 1, characterized in that: It also includes a grouting assembly as a slurry supply device, which is integrated on the vehicle body and includes a slurry tank, a slurry storage tank and a grouting pump which are connected in sequence through pipelines, and the grouting pump is connected to the flexible grouting pipe.

3. A roadbed transverse grouting reinforcement device according to claim 2, characterized in that: The vehicle body is provided with a water tank and a material box, both of which are connected with the pulping tank and supply raw materials to it.

4. A roadbed transverse grouting reinforcement device according to claim 2, characterized in that: The flexible grouting system also includes a pressure-stabilizing grouting head and a trustee recovery device. The flexible grouting pipe can be wound around the trustee recovery device. The flexible grouting pipe can be connected to a grouting pump at one end and to a pressure-stabilizing grouting head at the other end. The pressure-stabilizing grouting head is a cylindrical steel pipe with closed ends and grouting holes evenly arranged on the cylindrical surface.

5. A roadbed transverse grouting reinforcement device according to claim 4, characterized in that: The end of the flexible grouting pipe connected to the grouting pump is provided with a pressure monitoring device and a valve, and the pipe dragging and recovering device is equipped with a motor.

6. A roadbed transverse grouting reinforcement device according to claim 2, characterized in that: It also includes an electric control box for controlling the drilling assembly, the grouting assembly and the flexible grouting system.

7. The roadbed transverse grouting reinforcement equipment according to claim 1, characterized in that: The drilling assembly also includes a support column and a support platform rotatably connected thereto, the multi-axis mechanical arm includes a first rotating arm, a second rotating arm and a third rotating arm which are hinged in sequence and are all equipped with a drive, the first rotating arm is hinged on the support platform, the first rotating arm, the second rotating arm and the third rotating arm can rotate in a U-shape through corresponding drives so that the third rotating arm is in a horizontal state.

8. The roadbed transverse grouting reinforcement equipment according to claim 7, characterized in that: The third rotating arm is provided with a drilling power system, and the output end of the drilling power system is provided with the auger rod, and the tail end of the auger rod is an extension end so that the auger rod can be extended at the extension end after the drilling of a single section of the auger rod.

9. The roadbed transverse grouting reinforcement equipment according to claim 7, characterized in that: The drilling assembly also includes a mounting platform, which is connected to the vehicle body via bolts, and the support column is mounted on the mounting platform.

10. The working method of the roadbed transverse grouting reinforcement equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: The vehicle body is parked on the roadside in the road area where the disease is to be treated, and the multi-axis mechanical arm is operated to drive the spiral drill rod at its execution end to drill horizontal holes in the roadbed slope. After the drilling is completed, the roadbed is horizontally grouted using the segmented tube dragging grouting process; the segmented tube dragging grouting process is specifically: grouting is carried out section by section from the inside to the outside. After the grouting pressure is reached in the previous section, the tube is dragged outward and grouting continues to the next section to ensure that each section is grouted under the same grouting pressure and grouting control parameters until the grouting is completed.

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