Grouting anchor rod for geological disaster prevention and control construction

Abstract

The utility model relates to the technical field of anchorage device structures, in particular to a grouting anchor rod for geological disaster prevention and control construction, which comprises an anchor bar with a hollow tubular structure, and the surface of the anchor bar is divided into an anchoring section and an anchorage device mounting section; the drill bit is arranged at the tail end of the anchoring section of the anchor bar; the drill bit comprises a body, a mounting part and the tail end of the anchoring section are arranged at intervals, and a working part is arranged away from the anchor bar; the end wall of one end of the sleeve is connected with the end face of the mounting part, the inner wall of the sleeve sleeves the circumferential outer wall of the anchoring section, the other end of the sleeve is an opening part, and a boss is arranged on the inner wall of the opening part; the movable pipe is arranged between the sleeve and the anchoring section; wherein a sliding block is arranged on the inner wall of the casing pipe, an inclined groove is formed in the outer wall of the movable pipe, the sliding block is arranged in the inclined groove in a sliding mode, and the end, away from the body, of the movable pipe abuts against the inner wall of the boss.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor structure, and specifically provides a grouting anchor rod for geological disaster prevention and control construction. Background Art

[0002] In the field of geotechnical anchoring engineering, self-drilling grouting anchor rods are widely used in the reinforcement of broken rock formations due to their "drilling and anchoring integration" characteristics.

[0003] However, existing technologies suffer from two major structural flaws that severely limit their long-term reliability. First, conventional anchor bolts rely on the bonding strength of homogeneous cement slurry with the rock mass to maintain anchoring. However, in loose rock with developed seepage fissures, the slurry easily drains with groundwater, forming cavities and reducing the contact area between the anchor and the hole wall.

[0004] At the same time, the slurry microcracks caused by drill pipe vibration continue to expand under long-term load, causing the shear strength of the anchor body to deteriorate and eventually causing the entire anchor to fall off.

[0005] Secondly, the existing drill bit adopts a constant diameter cutting tooth design, and the drilled hole maintains a constant diameter from the bottom of the hole to the hole mouth. The smooth hole wall lacks a mechanical bite structure for the slurry, resulting in insufficient anti-slip ability of the anchoring interface.

[0006] Therefore, there is an urgent need for an anchor rod that can improve the installation strength of the grouting anchor rod. Utility Model Content

[0007] In order to solve the problem that the existing self-drilling grouting anchor rods are easy to fall off due to frequent use, the utility model provides a geological disaster prevention and control construction grouting anchor rod, which realizes the function of expanding the borehole formed by the initial drilling, thereby improving the installation strength of the slurry and anchor bars in the borehole.

[0008] According to one aspect of the utility model, a grouting anchor rod for geological disaster prevention and control construction is provided, which includes: an anchor bar, a hollow tubular structure, the surface of which is divided into an anchoring section and an anchor installation section; a drill bit, which is arranged at the end of the anchor section of the anchor bar; the drill bit includes: a body, a mounting portion and the end of the anchor section are spaced apart, and a working portion is arranged away from the anchor bar; a casing, one end wall of which is connected to the end face of the mounting portion, the inner wall of which is sleeved on the circumferential outer wall of the anchor section, and the other end is a support portion, and the inner wall of the support portion is provided with a boss; a movable tube, which is provided between the casing and the anchor section; wherein: the inner wall of the casing is provided with a slider, the outer wall of the movable tube is provided with an inclined groove, the slider is slidably arranged in the inclined groove, and the end of the movable tube away from the body abuts against the inner wall of the boss.

[0009] In some embodiments, the drill bit also includes: first cutting teeth, multiple first cutting teeth are evenly distributed on the working part surface of the body; chip grooves are provided on the outer wall of the working part of the body; wherein: multiple chip grooves are provided, and multiple chip grooves are distributed between each first cutting tooth.

[0010] In some embodiments, a cavity is provided in the body, which is connected to the inner wall of the anchor bar; a limit ring is provided in the sleeve, which is sleeved on the circumferential outer wall of the movable tube; a grouting hole is provided in the chip groove, one end of the grouting hole is connected to the outer wall of the chip groove, and the other end is connected to the cavity.

[0011] In some embodiments, the expansion portion includes: a partial ring body, which is provided in multiple pieces, and the multiple partial ring bodies are arranged in a circular array on the end wall of the sleeve; an expansion joint, which is provided between the partial ring bodies; an annular groove, which is provided on the circumferential outer wall of the connection between the sleeve and the expansion joint; wherein: each boss is respectively provided on the inner wall of each partial ring body, and each boss is provided in the form of an annular cover on the circumferential outer wall of the anchor bar.

[0012] In some embodiments, the boss includes multiple cones, the bottom surface of each cone is close to the end of the partial ring body away from the sleeve, the top of each cone is arranged toward the sleeve, and the outer wall of each cone is connected to the inner wall of each partial ring body.

[0013] In some embodiments, a mounting hole is provided on the outer wall of a portion of the ring body, and the mounting hole is provided at the end of the portion of the ring body away from the sleeve; a second cutting tooth is provided in the mounting hole; a cut is provided on the end wall of the portion of the ring body close to the second cutting tooth, and the cut is provided on the outer wall of the portion of the ring body.

[0014] In some embodiments, each partial ring body is provided with a section of the elastic metal cable; each partial ring body is provided with a through hole near the second cutting tooth, and each through hole is annularly covered and provided on the circumferential outer wall of the anchor bar.

[0015] In some embodiments, a convex ring is provided at one end of the moving tube close to the boss, and the convex ring is sleeved on the circumferential outer wall of the moving tube; wherein: the edge of the convex ring abuts against the inner wall of the cone.

[0016] In some embodiments, the anchor installation section of the anchor bar is provided with an anchor cup, which is sleeved on the circumferential outer wall of the anchor installation section; a locking nut is provided on the circumferential outer wall of the anchor cup; a slurry blocking plate is provided on the side of the locking nut close to the anchoring section; an inner hexagonal hole is provided on the end wall of the anchor installation section, and the inner hexagonal hole is used to clamp the output shaft of the drilling rig.

[0017] The embodiments of the present invention have the following advantages.

[0018] The anchor bar of the grouting anchor rod is made of threaded steel, which has a hollow structure. After the anchoring section of the hollow threaded steel enters the rock mass, grouting is injected into the anchor bar of the hollow structure, so that the slurry passes through the anchor bar and enters the hole formed by the drill bit on the rock mass. During the drilling process, the drilling rig connects the anchor installation section of the anchor bar and brings the end with the drill bit close to the rock wall. After starting the drilling rig, the anchor bar rotates, driving the moving pipe with the inclined groove to rotate. At this time, the slider slides in the inclined groove. When the slider reaches one end of the inclined groove, the inclined groove pushes the slider to rotate, and then drives the casing with the slider to rotate. When the casing rotates, it drives the body to rotate, and the rock mass is drilled through the working part of the body.

[0019] When the anchoring section reaches a predetermined depth, the drilling rig is started to rotate in the opposite direction, thereby driving the anchor bar to reverse. During the reversal of the anchor bar, the moving tube is driven to rotate in the opposite direction, and then the slider is driven to slide in the opposite direction in the inclined groove through the reverse rotation of the moving tube, so that the moving tube provided on the circumferential outer wall of the end of the anchoring section is pushed by the slider to move toward the end away from the body. When the moving tube moves, it abuts against the boss provided in the expanded part of the casing, and continues to move so that the moving tube pushes the boss to diverge to the four sides, thereby increasing the diameter of the expanded part. When the slider reaches the other end of the inclined groove, it abuts against the end wall of the inclined groove, and the slider cannot move further, and then the expanded expanded part can be driven by the anchor bar. The drill bit is then unloaded and grouting is injected into the hollow anchor bar. The slurry is diffused into the borehole through the anchor bar and the drill bit. By expanding the borehole in the initial drilling, a portion of the borehole has a diameter larger than the hole formed by the working part of the main body. After the slurry solidifies, a boss-shaped slurry is formed from the inside of the hole to the outside of the hole. Compared with the traditional slurry with exactly the same diameter, the anchoring effect is better and it is less likely to fall off from the borehole, resulting in failure of the anchoring effect.

[0020] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the grouting anchor structure of an embodiment of the present utility model.

[0024] Figure 2 This is a schematic diagram of the installation of a portion of the ring body of an embodiment of the present utility model.

[0025] Figure 3 This is a structural schematic diagram of the anchor installation section of an embodiment of the present utility model.

[0026] Figure 4 This is a schematic diagram of the sleeve installation of an embodiment of the present utility model.

[0027] Figure 5The figure is a schematic diagram of the drill bit structure according to one embodiment of the present invention.

[0028] Reference numerals

[0029] 100-anchor reinforcement;

[0030] 110-anchoring section; 120-installation section;

[0031] 200-drill bit;

[0032] 210 - body; 211 - cavity; 220 - sleeve; 221 - limiting ring; 230 - boss; 231 - cone; 240 - moving tube; 241 - convex ring; 250 - slider; 260 - inclined groove; 270 - first cutting tooth; 280 - chip removal groove; 281 - grouting hole; 290 - expansion part;

[0033] 291 - part of the ring body; 292 - expansion joint; 293 - annular groove; 294 - mounting hole; 295 - second cutting tooth; 296 - incision; 297 - elastic metal cable; 298 - through hole;

[0034] 300-anchor cup;

[0035] 400-lock nut;

[0036] 500-Slurry blocking board;

[0037] 600-Hexagon socket. DETAILED DESCRIPTION

[0038] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the following will be combined with the drawings of specific embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] As described above, in the use of traditional grouting anchor rods, since the inner diameter of the borehole formed by the drill bit in the rock wall does not change from beginning to end, the smooth hole wall easily causes the anchor rod to fall off after long-term use.

[0041] In order to at least partially solve one or more of the above problems and other potential problems, an exemplary embodiment of the present invention provides a grouting anchor rod for geological disaster prevention construction, which includes: an anchor bar 100, a hollow tubular structure, the surface of which is divided into an anchoring section 110 and an anchor installation section 120; a drill bit 200, which is arranged at the end of the anchoring section 110 of the anchor bar 100; the drill bit 200 includes: a body 210, a mounting portion spaced apart from the end of the anchoring section 110, and a working portion spaced apart from the anchor bar 100. ; The sleeve 220 has an end wall connected to the end face of the mounting portion, and its inner wall is sleeved on the circumferential outer wall of the anchoring section 110. The other end is a support portion 290, and a boss 230 is provided on the inner wall of the support portion 290; the movable tube 240 is arranged between the sleeve 220 and the anchoring section 110; wherein: the inner wall of the sleeve 220 is provided with a slider 250, and the outer wall of the movable tube 240 is provided with an inclined groove 260, the slider 250 is slidably arranged in the inclined groove 260, and the end of the movable tube 240 away from the main body 210 abuts against the inner wall of the boss 230.

[0042] In the above embodiment, the anchor bar 100 of the grouting anchor rod is made of threaded steel, and the threaded steel has a hollow structure. After the anchoring section 110 of the hollow threaded steel is used to enter the rock mass, grouting is performed in the anchor bar 100 of the hollow structure, so that the slurry passes through the anchor bar 100 and enters the channel formed by the drill bit 200 on the rock mass. During the drilling process, the drilling rig is connected to the anchor mounting section 120 of the anchor bar 100, and one end with the drill bit 200 is close to the rock wall. After starting the drilling rig, the anchor bar 100 rotates, driving the moving tube 240 with the inclined groove 260 to rotate. At this time, the slider 250 slides in the inclined groove 260. When the slider 250 reaches one end of the inclined groove 260, the inclined groove 260 pushes the slider 250 to rotate, and then drives the casing 220 with the slider 250 to rotate. When the casing 220 rotates, it drives the body 210 to rotate, and the rock mass is drilled through the working part of the body 210.

[0043] When the anchoring section 110 reaches the predetermined depth, the drilling rig is started to rotate in the opposite direction, thereby driving the anchor bar 100 to reverse. During the reversal of the anchor bar 100, the movable tube 240 is driven to rotate in the opposite direction, and then the slider 250 is driven to slide in the opposite direction in the inclined groove 260 through the reverse rotation of the movable tube 240, so that the movable tube 240 provided on the circumferential outer wall of the end of the anchoring section 110 is pushed by the slider 250 to move toward the end away from the body 210. When the movable tube 240 moves, it abuts against the boss 230 provided in the expansion portion 290 of the casing 220. Continuing to move causes the movable tube 240 to push the boss 230 to diverge in all directions, thereby increasing the diameter of the expansion portion 290. When the slider 250 reaches the other end of the inclined groove 260, it abuts against the end wall of the inclined groove 260, and the slider 250 cannot move further. , and then the anchor bar 100 can drive the expanded expansion part 290 to rotate. During the rotation of the expansion part 290, the hole on the rock mass is expanded. After the main body 210 moves a certain distance, the drilling rig stops working, and the anchor bar 100 is pushed into the drill hole again, so that the drill bit 200 abuts against the inner end wall of the initial drill hole. The drilling rig is removed and grouting is injected into the hollow anchor bar 100. The slurry is diffused into the drill hole through the anchor bar 100 and the drill bit 200. By expanding the hole in the initial drill hole, a part of the diameter of the drill hole is larger than the hole formed by the working part of the main body 210. After the slurry solidifies, a boss-shaped slurry is formed from the inside of the hole to the outside of the hole. Compared with the traditional slurry with exactly the same diameter, the anchoring effect is better and it is less likely to fall off from the drill hole, resulting in failure of the anchoring effect.

[0044] See also Figure 1-Figure 5 In some embodiments, the drill bit 200 further includes: first cutting teeth 270, multiple first cutting teeth 270 are evenly distributed on the working surface of the body 210; chip grooves 280 are provided on the outer wall of the working part of the body 210; wherein: multiple chip grooves 280 are provided, and multiple chip grooves 280 are distributed between each first cutting tooth 270.

[0045] In the above embodiment, the multiple first cutting teeth 270 serve as the "blades" of the working part of the drill bit 200, which achieve drilling by rotating, squeezing and shearing the rock mass. The drill cuttings are spirally discharged along the chip groove 280 under the action of centrifugal force to prevent repeated cutting. The multiple chip grooves 280 can reduce the risk of drill sticking.

[0046] See also Figure 1-Figure 5 In some embodiments, a cavity 211 is provided in the main body 210, and the cavity 211 is connected to the inner wall of the anchor bar 100; a limiting ring 221 is provided in the sleeve 220, and the limiting ring 221 is sleeved on the circumferential outer wall of the movable tube 240; a grouting hole 281 is provided in the chip groove 280, and one end of the grouting hole 281 is connected to the outer wall of the chip groove 280, and the other end is connected to the cavity 211.

[0047] In the above embodiment, the cavity 211 in the main body 210 is used for the slurry to enter the cavity 211 through the anchor bar 100 during the grouting process, and then the slurry entering the cavity 211 enters the outer wall of the main body 210 of the drill bit 200 through the grouting hole 281. Since the inner diameter of the drill hole formed by the first cutting tooth 270 is larger than the inner wall of the main body 210 and the casing 220, the slurry flows toward the outside of the hole along the outer wall of the main body 210 and the casing 220 after passing through the grouting hole 281.

[0048] See also Figure 1-Figure 5 In some embodiments, the expansion portion 290 includes: a partial ring body 291, which is provided in multiple, multiple partial ring bodies 291 are arranged in a circular array on the end wall of the sleeve 220; an expansion joint 292, which is provided between each partial ring body 291; an annular groove 293, which is provided on the circumferential outer wall of the connection between the sleeve 220 and the expansion joint 292; wherein: each boss 230 is respectively provided on the inner wall of each partial ring body 291, and each boss 230 is provided on the circumferential outer wall of the anchor bar 100 in the form of an annular cover.

[0049] In the above embodiment, some of the ring bodies 291 are arranged in a circular array on the end wall of the casing 220. The expansion joints 292 between the partial ring bodies 291 are used to expand the partial ring bodies 291 along the expansion joints 292 when the expansion portion 290 performs an expansion action. The annular grooves 293 are used to bend outward along the annular grooves 293 when the partial ring bodies 291 expand outward to expand the borehole in the loose rock formation.

[0050] See also Figure 1-Figure 5 In some embodiments, the boss 230 includes a plurality of cones 231 , the bottom surface of each cone 231 is close to the end of the partial ring body 291 away from the sleeve 220 , the top of each cone 231 is arranged toward the sleeve 220 , and the outer wall of each cone 231 is connected to the inner wall of each partial ring body 291 .

[0051] In the above embodiment, the boss 230 is composed of a plurality of cones 231, and the plurality of cones 231 are arranged in an annular shape on the outer wall of the anchor bar 100. The inclined surface of each cone 231 is used to cooperate with the movable tube 240. When the movable tube 240 moves in the direction close to the cone 231, the end wall of the movable tube 240 pushes each cone 231 to diverge to the surroundings, and then the cone 231 is used to achieve the effect of pushing each part of the ring body 291 to open.

[0052] See also Figure 1-Figure 5 In some embodiments, a mounting hole 294 is provided on the outer wall of the partial ring body 291, and the mounting hole 294 is provided at the end of the partial ring body 291 away from the sleeve 220; a second cutting tooth 295 is provided in the mounting hole 294; a cutout 296 is provided on the end wall of the partial ring body 291 close to the second cutting tooth 295, and the cutout 296 is provided on the outer wall of the partial ring body 291.

[0053] In the above embodiment, the mounting hole 294 is used to install the second cutting tooth 295. When the partial ring body 291 is expanded, the second cutting tooth 295 is pushed toward the inner wall of the rock borehole, so that the second cutting tooth 295 abuts against the inner wall of the rock borehole. The incision 296 can reduce the diameter of the end of the partial ring body 291 after expansion, so that the edge diameter of the end of the partial ring body 291 after expansion is smaller than the diameter of the second cutting tooth 295, thereby preventing the second cutting tooth 295 from being unable to abut against the inner wall of the borehole.

[0054] See also Figure 1-Figure 5 In some embodiments, each partial ring body 291 is provided with a section of the elastic metal cable 297; each partial ring body 291 is provided with a through hole 298 near the second cutting tooth 295, and each through hole 298 is annularly covered and provided on the circumferential outer wall of the anchor bar 100.

[0055] In the above embodiment, the through holes 298 opened in each partial ring body 291 are used to install the elastic metal cable 297. After the through holes 298 are connected, a ring body is formed. The elastic metal cable 297 connects the partial ring bodies 291. When the partial ring body 291 is opened near one end of the second cutting tooth 295, the elastic metal cable 297 stretches until the elastic metal cable 297 can no longer be elastically deformed. The elastic metal cable 297 is used to limit the opening of each partial ring body 291 to prevent the elastic metal cables 297 from being excessively opened, resulting in an excessively large angle between the second cutting tooth 295 and the inner wall of the borehole, which makes it impossible to cut the rock normally.

[0056] See also Figure 1-Figure 5 In some embodiments, a convex ring 241 is provided at one end of the movable tube 240 close to the boss 230 , and the convex ring 241 is sleeved on the circumferential outer wall of the movable tube 240 ; wherein: the edge of the convex ring 241 abuts against the inner wall of the cone 231 .

[0057] In the above embodiment, the convex ring 241 is used to further increase the expansion range of the ring body 291, so that the diameter of the expanded hole is larger, which is more conducive to the slurry in the expanded hole solidifying into slurry and abutting against the inner wall of the expanded hole, making it less likely for the slurry to escape from the drill hole along with the anchor bar 100.

[0058] See also Figure 1-Figure 5 In some embodiments, the anchor installation section 120 of the anchor bar 100 is provided with an anchor cup 300, and the anchor cup 300 is sleeved on the circumferential outer wall of the anchor installation section 120; the circumferential outer wall of the anchor cup 300 is provided with a locking nut 400;

[0059] A slurry blocking plate 500 is provided on one side of the locking nut 400 close to the anchoring section 110; an inner hexagonal hole 600 is provided on the end wall of the anchor installation section 120, and the inner hexagonal hole 600 is used to clamp the output shaft of the drilling rig.

[0060] In the above embodiment, before drilling, the slurry blocking plate 500 is sleeved on the anchor installation section 120, and then the anchor cup 300 is sleeved on the circumferential outer wall of the anchor installation section 120 of the anchor bar 100, and the locking nut 400 is fixed to the circumferential outer wall of the anchor cup 300. When the anchoring section 110 completely enters the borehole, grouting is performed in the hollow anchor bar 100, and the slurry flows through the outer wall of the anchor bar 100 toward the outside of the hole. The slurry blocking plate 500 blocks the slurry to improve the grouting effect.

[0061] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

[0062] The terms used in this document are selected to best explain the principles of the embodiments, practical applications or technical improvements in the market, or to enable other ordinary technicians in this technical field to understand the embodiments disclosed in this document.

[0063] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A grouting anchor rod for geological disaster prevention and control construction, characterized in that: include: Anchor bar (100), a hollow tubular structure, the surface of which is divided into an anchoring section (110) and an anchor installation section (120); a drill bit (200) disposed at the end of the anchoring section (110) of the anchor bar (100); The drill bit (200) comprises: The main body (210) has a mounting portion spaced apart from the end of the anchoring section (110), and a working portion spaced apart from the anchor bar (100); A sleeve (220), one end wall of which is connected to the end surface of the mounting portion, an inner wall of which is sleeved on the circumferential outer wall of the anchoring section (110), and the other end of which is a support portion (290), wherein the inner wall of the support portion (290) is provided with a boss (230); The movable tube (240) is provided between the casing (220) and the anchoring section (110); wherein: The inner wall of the sleeve (220) is provided with a slider (250), the outer wall of the movable tube (240) is provided with an inclined groove (260), the slider (250) is slidably arranged in the inclined groove (260), and the end of the movable tube (240) away from the body (210) abuts against the inner wall of the boss (230).

2. The grouting anchor rod for geological disaster prevention construction according to claim 1, characterized in that: The drill bit (200) further comprises: First cutting teeth (270), a plurality of first cutting teeth (270) are evenly distributed on the surface of the working portion of the body (210); A chip removal groove (280) is provided on the outer wall of the working portion of the body (210); wherein: A plurality of the chip removal grooves (280) are provided, and the plurality of chip removal grooves (280) are distributed between each first cutting tooth (270).

3. The grouting anchor rod for geological disaster prevention construction according to claim 2 is characterized in that: A cavity (211) is provided in the body (210), and the cavity (211) is communicated with the inner wall of the anchor bar (100); A limiting ring (221) is provided in the sleeve (220), and the limiting ring (221) is sleeved on the circumferential outer wall of the movable tube (240); A grouting hole (281) is provided in each of the chip removal grooves (280), one end of the grouting hole (281) being connected to the outer wall of the chip removal groove (280), and the other end being connected to the cavity (211).

4. The grouting anchor rod for geological disaster prevention construction according to claim 3 is characterized in that: The expansion portion (290) comprises: a partial ring body (291), a plurality of which are provided, and the plurality of partial ring bodies (291) are arranged in an annular array on the end wall of the sleeve (220); An expansion joint (292) is provided between the partial ring bodies (291); An annular groove (293) is provided on the circumferential outer wall of the connection between the sleeve (220) and the expansion joint (292); wherein: Each boss (230) is respectively arranged on the inner wall of each partial ring body (291), and each boss (230) is arranged on the circumferential outer wall of the anchor bar (100) in the form of an annular cover.

5. The grouting anchor rod for geological disaster prevention construction according to claim 4 is characterized in that: The boss (230) includes a plurality of cones (231), the bottom surface of each cone (231) is close to the end of the partial ring body (291) away from the sleeve (220), the top of each cone (231) is arranged toward the sleeve (220), and the outer wall of each cone (231) is connected to the inner wall of each partial ring body (291).

6. The grouting anchor rod for geological disaster prevention construction according to claim 5, characterized in that: The outer wall of the partial ring body (291) is provided with a mounting hole (294), and the mounting hole (294) is provided at one end of the partial ring body (291) away from the sleeve (220); A second cutting tooth (295) is provided in the mounting hole (294); An end wall of the partial ring body (291) close to the second cutting tooth (295) is provided with a cutout (296), and the cutout (296) is provided on the outer wall of the partial ring body (291).

7. The grouting anchor rod for geological disaster prevention construction according to claim 6, characterized in that: Each of the partial ring bodies (291) is provided with a section of the elastic metal cable (297); Each of the partial ring bodies (291) is provided with a through hole (298) near the second cutting tooth (295), and each through hole (298) is provided in the form of an annular cover on the circumferential outer wall of the anchor bar (100).

8. The grouting anchor rod for geological disaster prevention construction according to claim 7, characterized in that: A convex ring (241) is provided at one end of the movable tube (240) close to the boss (230), and the convex ring (241) is sleeved on the circumferential outer wall of the movable tube (240); wherein: The edge of the convex ring (241) abuts against the inner wall of the cone (231).

9. The grouting anchor rod for geological disaster prevention construction according to claim 8, characterized in that: The anchor installation section (120) of the anchor bar (100) is provided with an anchor cup (300), and the anchor cup (300) is sleeved on the circumferential outer wall of the anchor installation section (120); A locking nut (400) is provided on the circumferential outer wall of the anchor cup (300); A slurry blocking plate (500) is provided on one side of the locking nut (400) close to the anchoring section (110); The end wall of the anchor installation section (120) is provided with a hexagonal hole (600), and the hexagonal hole (600) is used for clamping the output shaft of the drilling rig.

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