Telescopic grouting device for karst treatment of rock-soil

Abstract

The rock soil karst treatment telescopic grouting device discloses to the building engineering technical field, and the grouting device body includes extension device, protection device and telescopic component, the bottom of extension device is set to the rotating hole machine, and the back of rotating hole machine is connected with the drive machine, extension device is located in front of telescopic component, and protection device is wrapped in the outer ring of extension device and telescomic component, and telescopic component includes reinforcing component, positioning cylinder and limiting component;The advantages of the present application are that: the top of the adjusting column and the inner wall of the limiting component are not connected, which facilitates the extension device to be extracted from the rock soil karst and the inside of the limiting component, otherwise, the rotating cylinder and the threaded bolt are tightened, the adjusting column is lifted upward, so that the reinforcing component and the limiting component are fixed, so that the extension device and the protection device can move inside the rock soil karst, so that the grouting position can reach the grouting condition.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a telescopic grouting device for treating rock and karst. Background Technology

[0002] Karst formations are primarily composed of soluble rocks such as limestone, dolomite, gypsum, and rock salt. Due to constant erosion and dissolution by water, they gradually form solution channels, sinkholes, caves, structural zones, faults, funnels, solution depressions, water-leaking caves, and even underground river channels. Pile foundation construction in karst formations is highly challenging, with common problems including borehole collapse, grout leakage, stuck drill bits, buried drill bits, and concrete leakage, severely impacting the quality and safety of the pile foundation construction. Before construction, a thorough understanding of the site's geological and hydrological conditions is essential, along with a comprehensive analysis of the impact of complex geological conditions on the project. Furthermore, contingency plans for various issues must be incorporated into the construction scheme and organization to ensure smooth construction progress.

[0003] Currently available grouting devices are integrated straight pipes. Such grouting devices have a relatively simple structure and a wide range of applications. The entire grouting pipe is filled with grouting holes. Grout is simply delivered from the inlet, and the grout flows out from the bottom, slowly filling the pipe until it is completely filled. However, this process is time-consuming and slow. When there are two karst layers with a limestone layer in between, the surface needs to be grouted. It is necessary to consider whether direct grouting is possible. If direct grouting is used, can the limestone layer and the grout layer completely overlap? Also, according to the original grouting technology, the limestone layer is very likely to block the grouting holes. Using a sleeve for slow grouting can not only solve the problem of blocked grouting holes, but also optimize the problem of the grouting device being unable to be removed after grouting. Therefore, we propose a telescopic grouting device for karst treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a telescopic grouting device for treating rock and karst.

[0005] To address the problems mentioned in the background art, the present invention provides the following technical solution: a telescopic grouting device for rock and soil karst treatment, comprising a grouting device body, the grouting device body including an extension device, a protective device, and a telescopic component, the bottom of the extension device being configured as a drilling machine, and a drive motor being connected to the back of the drilling machine, the extension device being located in front of the telescopic component, and the protective device being wrapped around the extension device and the outer ring of the telescopic component, the telescopic component including a reinforcing component, a positioning cylinder, and a limiting component, the reinforcing component being located inside the positioning cylinder, and the limiting component being installed on the outer ring of the positioning cylinder, the front end of the reinforcing component being configured as a movable block, and the movable block being connected to the front end of the rotating cylinder.

[0006] As a further aspect of the present invention: the back side of the drilling machine and the rotating shaft extending from the front end of the drive motor are fixedly connected, and the front end of the drilling machine extends out of the protective device. The rear end cross section of the drilling machine is smaller than the inner hollow cross section of the protective device, and the two are tightly connected. The rear end of the drive motor is engaged with the front end of the limiting component.

[0007] The above scheme uses a metal drill bit to drill into the surface of rock, soil, and karst, and the surface can also be cleaned. The drill bit allows the location to be grouted to meet the grouting conditions. The drive motor moves with the limiting component, thereby evacuating the inside of the protective device when grouting is needed. The front end of the limiting component and the rear end of the drive motor are fixedly connected. When the drive motor rotates at high speed, it drives the drill bit connected to the front end to rotate, thereby polishing the area to be grouted, making the surface smooth and free of impurities. This ensures that the grouting location is firm and less prone to cracking. The limiting component also guides the extension device forward in the rock, soil, and karst area.

[0008] As a further embodiment of the present invention: the outer surface of the protective device is provided with a groove, and a roller is engaged with the inner wall of the groove. A pulley is sleeved on the outer ring of the roller. The protective device is provided with three sets, and the included angle between each set is 60°.

[0009] The above scheme includes three sets of pulleys, evenly installed on the outer ring of the protective device. The pulleys facilitate smooth retraction between the protective device and the karst rock. The grooves are not deeply recessed to prevent impurities in the rock from clogging them. Gaps are left between the rollers and the pulleys to prevent impurities from jamming the pulleys. The inner cross-section of the protective device is equal to or larger than that of the drilling machine, allowing the extension device to be retracted during grouting for easy internal grouting. Multiple sets of grooves are provided on the outer surface of the protective device, with rollers engaged between the inner walls of the grooves. The rollers facilitate the rolling of the pulleys. The grouting device body needs to undergo surface treatment of the karst rock before grouting, which requires expanding the grouting area. The pulleys installed on the outer surface of the protective device are used for dismantling.

[0010] As a further aspect of the present invention: the telescopic component and the protective device are movably connected, the reinforcing component is located inside the positioning cylinder, and the two are movably connected.

[0011] Through the above scheme, the telescopic component can be connected to the protective device by controlling the tension. The telescopic component mainly moves the extension device and the protective device synchronously.

[0012] As a further aspect of the present invention: the front end of the movable block is tapered, and the rear end is fixedly connected to a threaded bolt; the inner ring of the front end of the rotating cylinder is stretched with a threaded groove, and the pitch of the threaded groove is equal to that of the outer ring of the threaded bolt; the interior of the rotating cylinder is hollow; the other end of the rotating cylinder is connected to a fixed block; and a connecting post is installed on the inner back side of the fixed block.

[0013] With the above solution, the movable block is connected to the fixed block using threaded bolts. When the distance between the two is shortened, it can lift the top part; conversely, it will become loose.

[0014] As a further embodiment of the present invention: the positioning cylinder is hollow inside and has inclined openings at both ends. Circular holes are provided at the inclined openings at both ends. There are three sets of circular holes, which correspond to the limiting components. The outer wall of the positioning cylinder and the inner wall of the limiting components are tightly fitted together.

[0015] Through the above scheme, the positioning cylinder can limit the rotation of the cylinder, thereby restricting the position between the two when the moving block is rotated and fixed, preventing the moving block and the fixed block from failing to produce the lifting and unlifting effect with the adjusting column.

[0016] As a further aspect of the present invention: a protective ring is installed near the front outer ring of the limiting component, and two telescopic holes are opened on the surface of the limiting component, an interlocking groove is opened between the two telescopic holes, and a screw hole is opened at the middle end of the interlocking groove.

[0017] As a further embodiment of the present invention: the circular hole and the telescopic hole are connected to each other, and an adjusting column runs through both of them. The top of the adjusting column is provided with a slit. The number of adjusting columns is equal to the number of telescopic holes. A compression plate is connected between the slits. The middle end of the compression plate is engaged with the interlocking groove, and the compression plate is installed using screws.

[0018] Through the above scheme, the movable block and the fixed block rotate to increase or decrease the distance between them. When the distance increases, the entire adjusting column is pressed down by the compression plate, preventing the top surface of the adjusting column from connecting with the inner wall of the protective device. This decouples the reinforcing components and extension device from the protective device, facilitating the later evacuation of the protective device for grouting. Simultaneously, the protective device is slowly withdrawn, ensuring complete grouting of the inner wall of the rock, soil, and karst. The compression plate presses down the adjusting column, eliminating the connection between the adjusting column and the inner wall of the protective device. The movable block and the fixed block are connected... The device is connected via a threaded bolt and a rotating cylinder. When the rotating cylinder rotates, it can achieve a tightening or loosening effect with the threaded bolt. When loose, the moving block and the fixed block are not connected to the adjusting column, and the top of the adjusting column is not connected to the inner wall of the limiting component. This makes it easy to pull the extension device out of the rock, soil, karst, and the limiting component. Conversely, when the rotating cylinder and the threaded bolt are tightened, the adjusting column is pushed upward, thereby fixing the reinforcing component and the limiting component. This allows the extension device and the protective device to move inside the rock, soil, and karst, thus enabling the grouting position to meet the grouting conditions.

[0019] As a further embodiment of the present invention: the bottom ends of the two adjusting columns are respectively connected to the top surfaces of the movable block and the fixed block.

[0020] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows:

[0021] 1. The front end of the limiting component and the rear end of the drive motor are fixedly connected. When the drive motor rotates at high speed, it drives the hole drilling machine connected to the front end to rotate, so that the grouting area can be polished to make the surface to be grouting smooth and free of impurities. This makes the grouting position firm and less prone to cracking. The limiting component can guide the extension device forward in the rock and soil karst area.

[0022] 2. The inner cross-section of the protective device is equal to or larger than that of the drilling machine, which allows the extension device to be pulled back during grouting, facilitating internal grouting. Multiple grooves are provided on the outer surface of the protective device, and rollers are engaged between the inner walls of the grooves. The rollers facilitate the rolling of the pulleys. The grouting device body needs to perform surface treatment on the rock and karst areas between grouting operations, which requires expanding the grouting area and using the pulleys installed on the outer surface of the protective device for dismantling.

[0023] 3. The movable block and the fixed block are connected by a threaded bolt and a rotating cylinder. When the rotating cylinder rotates, it can achieve a tightening or loosening effect with the threaded bolt. When loose, the movable block and the fixed block are not connected to the adjusting column, and the top of the adjusting column is not connected to the inner wall of the limiting component, which makes it easy to pull the extension device out of the rock, soil, karst and the limiting component. Conversely, when the rotating cylinder and the threaded bolt are tightened, the adjusting column is pushed upward, which can fix the reinforcing component and the limiting component. This allows the extension device and the protective device to move inside the rock, soil and karst, so that the grouting position can meet the grouting conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the grouting device body in an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the back of the grouting device body in an embodiment of the present invention;

[0026] Figure 3 This is a three-dimensional cross-sectional view of the grouting device body in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram showing the connection between the extension device and the limiting component in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram showing the back of the extension device and the limiting component in an embodiment of the present invention;

[0029] Figure 6 This is a three-dimensional schematic diagram of the limiting component in an embodiment of the present invention;

[0030] Figure 7 This is a schematic cross-sectional view of the limiting component in an embodiment of the present invention;

[0031] Figure 8 This is a three-dimensional schematic diagram of the extension device in an embodiment of the present invention;

[0032] Figure 9 This is a three-dimensional schematic diagram of the reinforcement component in an embodiment of the present invention;

[0033] Figure 10 This is a cross-sectional schematic diagram of the reinforcement component in an embodiment of the present invention.

[0034] In the diagram: 1. Grouting device body; 2. Extension device; 21. Drilling machine; 22. Drive machine; 3. Protective device; 31. Groove; 32. Roller; 33. Pulley; 4. Telescopic assembly; 5. Reinforcing assembly; 51. Movable block; 511. Threaded bolt; 52. Rotating cylinder; 521. Fixed block; 522. Connecting column; 6. Positioning cylinder; 7. Limiting assembly; 71. Protective ring; 72. Telescopic hole; 73. Embedding groove; 731. Screw hole; 8. Adjusting column; 81. Cutout; 82. Compression plate. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Example 1

[0037] Please see Figures 1-10 The present invention provides a technical solution: a telescopic grouting device for rock and soil karst treatment, comprising a grouting device body 1, the grouting device body 1 including an extension device 2, a protective device 3 and a telescopic component 4, the bottom of the extension device 2 being configured as a drilling machine 21, and the back of the drilling machine 21 being connected to a drive motor 22, the extension device 2 being located in front of the telescopic component 4, and the protective device 3 being wrapped around the outer ring of the extension device 2 and the telescopic component 4, the telescopic component 4 including a reinforcing component 5, a positioning cylinder 6 and a limiting component 7, the reinforcing component 5 being located inside the positioning cylinder 6, and the limiting component 7 being installed on the outer ring of the positioning cylinder 6, the front end of the reinforcing component 5 being configured as a movable block 51, and the movable block 51 being connected to the front end of the rotating cylinder 52.

[0038] Please see Figures 4-5 and Figure 8 The back of the drilling machine 21 and the rotating shaft extending from the front end of the drive motor 22 are fixedly connected, and the front end of the drilling machine 21 extends out of the protective device 3. The rear end cross section of the drilling machine 21 is smaller than the inner hollow cross section of the protective device 3, and the two are tightly connected. The rear end of the drive motor 22 is snapped into the front end of the limiting component 7.

[0039] In this embodiment, the drilling machine 21 is a metal drill bit that can drill into the surface of rock, soil and karst, and can also clean the surface. The drilling machine 21 can make the location that needs grouting reach the grouting conditions. The drive machine 22 moves with the limiting component 7, so that when grouting is needed, the inside of the protective device 3 is emptied.

[0040] When in use, the front end of the limiting component 7 and the rear end of the drive motor 22 are fixedly connected. When the drive motor 22 rotates at high speed, it drives the hole drilling machine 21 connected to the front end to rotate, so that the grouting area can be polished to make the surface to be grouting smooth and free of impurities. This makes the grouting position firm and less prone to cracking. The limiting component 7 can guide the extension device 2 forward in the rock and soil karst area.

[0041] Example 2

[0042] Please see Figures 1-10 The present invention provides a technical solution: a telescopic grouting device for rock and soil karst treatment, comprising a grouting device body 1, the grouting device body 1 including an extension device 2, a protective device 3 and a telescopic component 4, the bottom of the extension device 2 being configured as a drilling machine 21, and the back of the drilling machine 21 being connected to a drive motor 22, the extension device 2 being located in front of the telescopic component 4, and the protective device 3 being wrapped around the outer ring of the extension device 2 and the telescopic component 4, the telescopic component 4 including a reinforcing component 5, a positioning cylinder 6 and a limiting component 7, the reinforcing component 5 being located inside the positioning cylinder 6, and the limiting component 7 being installed on the outer ring of the positioning cylinder 6, the front end of the reinforcing component 5 being configured as a movable block 51, and the movable block 51 being connected to the front end of the rotating cylinder 52.

[0043] Please see Figure 1 The outer surface of the protective device 3 is provided with a groove 31, and a roller 32 is engaged with the inner wall of the groove 31. A pulley 33 is sleeved on the outer ring of the roller 32. The protective device 3 is provided with three sets, and the included angle between each set is 60°.

[0044] In this embodiment, three sets of pulleys 33 are evenly installed on the outer ring of the protective device 3. The pulleys 33 can help the protective device 3 and the rock and karst to achieve a smooth effect when being pulled back. The groove 31 is not deeply recessed to prevent impurities in the rock and soil from blocking the groove 31. A gap is left between the roller 32 and the pulley 33 to prevent impurities from jamming the pulley 33.

[0045] When in use, the inner cross-section of the protective device 3 is equal to or greater than that of the drilling machine 21, which allows the extension device 2 to be pulled back during grouting, facilitating grouting inside. Multiple sets of grooves 31 are provided on the outer surface of the protective device 3, and rollers 32 are engaged between the inner walls of the grooves 31. The rollers 32 facilitate the rolling of the pulleys 33. The grouting device body 1 needs to perform surface treatment on the rock and karst area between grouting operations, which requires expanding the grouting position and using the pulleys 33 installed on the outer surface of the protective device 3 for dismantling.

[0046] Example 3

[0047] Please see Figures 1-10The present invention provides a technical solution: a telescopic grouting device for rock and soil karst treatment, comprising a grouting device body 1, the grouting device body 1 including an extension device 2, a protective device 3 and a telescopic component 4, the bottom of the extension device 2 being configured as a drilling machine 21, and the back of the drilling machine 21 being connected to a drive motor 22, the extension device 2 being located in front of the telescopic component 4, and the protective device 3 being wrapped around the outer ring of the extension device 2 and the telescopic component 4, the telescopic component 4 including a reinforcing component 5, a positioning cylinder 6 and a limiting component 7, the reinforcing component 5 being located inside the positioning cylinder 6, and the limiting component 7 being installed on the outer ring of the positioning cylinder 6, the front end of the reinforcing component 5 being configured as a movable block 51, and the movable block 51 being connected to the front end of the rotating cylinder 52.

[0048] Please see Figures 6-7 and Figures 9-10 The front end of the movable block 51 is tapered, and the rear end is fixedly connected to a threaded bolt 511. The inner ring of the front end of the rotating cylinder 52 is stretched with a threaded groove, and the thread pitch is equal to that of the threaded groove on the outer ring of the threaded bolt 511. The interior of the rotating cylinder 52 is hollow. The other end of the rotating cylinder 52 is connected to a fixed block 521. A connecting post 522 is installed on the inner back of the fixed block 521. A protective ring 71 is installed near the front outer ring of the limiting component 7, and two telescopic holes 72 are opened on the surface of the limiting component 7. The two telescopic holes 72 are separated by an opening. A fitting groove 73 is provided, and a screw hole 731 is provided at the middle of the fitting groove 73. The round hole and the telescopic hole 72 are connected to each other, and an adjusting column 8 passes through the inside of both. A notch 81 is provided at the top of the adjusting column 8. The number of adjusting columns 8 is equal to the number of telescopic holes 72. A compression plate 82 is connected between the notches 81. The middle end of the compression plate 82 is snapped into the fitting groove 73, and the compression plate 82 is installed with screws. The bottom ends of the two adjusting columns 8 are connected to the top surfaces of the movable block 51 and the fixed block 521, respectively.

[0049] In this embodiment, the movable block 51 and the fixed block 521 use rotation to increase or decrease the distance between them. When the distance increases, the entire adjusting column 8 is pressed down by the compression plate 82, so that the top surface of the adjusting column 8 is not connected to the inner wall of the protective device 3. Thus, the reinforcing component 5 and the extension device 2 are not linked with the protective device 3, which facilitates the later evacuation of the interior of the protective device 3 for grouting. While grouting, the protective device 3 is slowly pulled out, so that the inner wall of the rock and karst can be completely grouted. The compression plate 82 can press down the adjusting column 8, canceling the connection between the adjusting column 8 and the inner wall of the protective device 3. The positioning cylinder 6 can limit the rotation cylinder 52, thereby restricting the position between the two when the movable block 51 is rotated and fixed, preventing the movable block 51 and the fixed block 521 from failing to produce the lifting and canceling lifting effect with the adjusting column 8.

[0050] In use, the movable block 51 and the fixed block 521 are connected by a threaded bolt 511 and a rotating cylinder 52. When the rotating cylinder 52 rotates, it can achieve a tightening or loosening effect with the threaded bolt 511. When loose, the movable block 51 and the fixed block 521 are not connected to the adjusting column 8, so that the top of the adjusting column 8 is not connected to the inner wall of the limiting component 7, which makes it easy to pull the extension device 2 out of the rock, soil, karst and the limiting component 7. Conversely, the rotating cylinder 52 and the threaded bolt 511 become tight, and the adjusting column 8 is pushed upward, thereby fixing the reinforcing component 5 and the limiting component 7. This allows the extension device 2 and the protective device 3 to move inside the rock, soil, karst, so that the grouting position can meet the grouting conditions.

[0051] Working principle: First, the movable block 51 and the fixed block 521 are connected by a threaded bolt 511 and a rotating cylinder 52. When the rotating cylinder 52 rotates, it can achieve a tightening effect with the threaded bolt 511. When it is loose, the movable block 51 and the fixed block 521 are not connected to the adjusting column 8, so that the top of the adjusting column 8 is not connected to the inner wall of the limiting component 7, which makes it easy to pull the extension device 2 out of the rock, soil, karst and the limiting component 7. Conversely, the rotating cylinder 52 and the threaded bolt 511 become tight, and the adjusting column 8 is pushed upward, thereby fixing the reinforcing component 5 and the limiting component 7. This allows the extension device 2 and the protective device 3 to move inside the rock, soil, karst, so that the grouting position can meet the grouting conditions. Secondly, the front end of the limiting component 7 is fixedly connected to the rear end of the drive motor 22. When the drive motor 22 rotates at high speed, it drives the drilling machine 21 connected to the front end to rotate, thereby polishing the area where grouting is needed, making the surface smooth and free of impurities. This ensures that the grouting position is firm and less prone to cracking. The limiting component 7 can guide the extension device 2 forward in the rock and karst area. Finally, the inner cross-section of the protective device 3 is equal to or larger than that of the drilling machine 21, which allows the extension device 2 to be pulled back during grouting, facilitating internal grouting. Multiple sets of grooves 31 are formed on the outer surface of the protective device 3, and rollers 32 are engaged between the inner walls of the grooves 31. The rollers 32 facilitate the rolling of the pulleys 33. The grouting device body 1 needs to perform surface treatment on the rock and karst area before grouting, which requires expanding the grouting position. The pulleys 33 installed on the outer surface of the protective device 3 are used for disassembly.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A telescopic grouting device for treating karst and soil conditions, comprising a grouting device body (1), characterized in that: The grouting device body (1) includes an extension device (2), a protective device (3), and a telescopic component (4). The bottom of the extension device (2) is set as a drilling machine (21), and the back of the drilling machine (21) is connected to a drive machine (22). The extension device (2) is located in front of the telescopic component (4), and the protective device (3) is wrapped around the extension device (2) and the outer ring of the telescopic component (4). The telescopic component (4) includes a reinforcing component (5), a positioning cylinder (6), and a limiting component (7). The reinforcing component (5) is located inside the positioning cylinder (6), and the limiting component (7) is installed on the outer ring of the positioning cylinder (6). The front end of the reinforcing component (5) is set as a movable block (51), and the movable block (51) is connected to the front end of the rotating cylinder (52). The front end of the movable block (51) is tapered, and the rear end is fixedly connected to a threaded bolt (511). The inner ring of the front end of the rotating cylinder (52) is stretched with a threaded groove, and the pitch of the threaded groove is equal to that of the outer ring of the threaded bolt (511). The interior of the rotating cylinder (52) is hollow. The other end of the rotating cylinder (52) is connected to a fixed block (521). A connecting post (522) is installed on the inner back side of the fixed block (521). The positioning cylinder (6) is hollow inside and has inclined openings at both ends. There are three sets of circular holes at the inclined openings at both ends, which correspond to the limiting component (7). The outer wall of the positioning cylinder (6) and the inner wall of the limiting component (7) are tightly fitted together. The limiting component (7) has a protective ring (71) installed near the front outer ring, and two telescopic holes (72) are opened on the surface of the limiting component (7), and an interlocking groove (73) is opened between the two telescopic holes (72), and a screw hole (731) is opened at the middle end of the interlocking groove (73). The circular hole and the telescopic hole (72) are connected to each other, and an adjusting column (8) runs through them. The top of the adjusting column (8) is provided with a cut (81). The number of adjusting columns (8) is equal to the number of telescopic holes (72). A compression plate (82) is connected between the cuts (81). The middle end of the compression plate (82) is engaged with the interlocking groove (73). The compression plate (82) is installed with screws.

2. The telescopic grouting device for karst treatment according to claim 1, characterized in that: The back of the drilling machine (21) and the rotating shaft extending from the front end of the drive machine (22) are fixedly connected, and the front end of the drilling machine (21) extends out of the protective device (3). The rear end cross section of the drilling machine (21) is smaller than the inner hollow cross section of the protective device (3), and the two are tightly connected. The rear end of the drive machine (22) is snapped into the front end of the limiting component (7).

3. The telescopic grouting device for karst treatment according to claim 1, characterized in that: The outer surface of the protective device (3) is provided with a groove (31), and a roller (32) is engaged in the inner wall of the groove (31). A pulley (33) is sleeved on the outer ring of the roller (32). The protective device (3) is provided with three sets, and the included angle between each set is 60°.

4. The telescopic grouting device for karst treatment according to claim 1, characterized in that: The telescopic component (4) and the protective device (3) are movably connected, and the reinforcing component (5) is located inside the positioning cylinder (6) and the two are movably connected.

5. The telescopic grouting device for karst treatment according to claim 1, characterized in that: The bottom ends of the two adjusting columns (8) are connected to the top surfaces of the movable block (51) and the fixed block (521), respectively.

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