Anchor fluke type grouting anchor rod

Abstract

The utility model discloses an anchor fluke type grouting anchor rod, which relates to the technical field of grouting anchor rods, and comprises a hollow grouting anchor rod, a flexible filler and a tray, the hollow grouting anchor rod is provided with a first end and a second end, and a plurality of barbs are fixedly arranged at the first end; a grouting channel is formed in the hollow grouting anchor rod, and at least one slurry discharge hole communicated with the grouting channel is formed in the outer side wall of the hollow grouting anchor rod; a grouting opening communicated with the grouting channel is formed in the second end; when the hollow grouting anchor rod is located in the anchor hole, the space between the outer side of the hollow grouting anchor rod and the inner wall of the anchor hole is filled with the flexible filler, and the flexible filler is located at the position, close to an anchor hole opening, in the anchor hole; the flexible filler is breathable and permeable to water, and the grouting liquid cannot penetrate through the flexible filler; the tray is fixedly arranged on the outer side wall, located outside the anchor hole, of the hollow grouting anchor rod, and the tray is tightly pressed on the surface of a supported structure. The falling risk can be reduced, tight combination with the hole wall can be achieved, and the anchoring effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting anchor rods, in particular to an anchor claw type grouting anchor rod. Background Art

[0002] In the field of geotechnical engineering, the foundation pit, rock slope, roadway engineering, and tunnel excavation involved are affected by disturbances such as foundation pit excavation, landslides, and roadway tunneling, causing large deformation of the surrounding rock, which slows down the construction progress and threatens the lives of personnel in serious cases. The geological conditions for soft slopes, foundation pits, etc. should be determined based on the requirements of deformation, stress, and shear strength of the building. For harder rock mass, considering that the hole wall is relatively smooth and the interior is not easy to collapse, the grouting anchor rods are easy to pull out during the grouting operation, and the hole wall becomes hollow, and the mechanical properties of the structure are difficult to meet the requirements of engineering design.

[0003] In order to solve the problems existing in the existing rock and soil anchoring technology, hollow grouting anchor rods have been developed in recent years. The existing grouting anchor rod sleeve is a steel pipe, and the anchor rod body is made of threaded steel. The grouting anchor rod has overcome the shortcomings of the existing anchor rods to a certain extent, but the grouting anchor rod also has the following defects: 1. There is a large gap between the grouting anchor rod and the hole wall, and the anchor rod may fall off when grouting is not performed; 2. The front end of the grouting anchor rod is not tightly combined with the hole wall, which reduces the breaking force of the grouting anchor rod. Utility Model Content

[0004] The utility model aims to provide an anchor claw type grouting anchor rod to solve the problems existing in the above-mentioned prior art, reduce the risk of falling off, and can be closely combined with the hole wall to improve the anchoring effect.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides an anchor claw type grouting anchor rod, comprising a hollow grouting anchor rod, a flexible filler and a tray; the hollow grouting anchor rod has a first end and a second end, and a plurality of barbs are fixedly arranged on the circumferential outer wall of the first end; the first end with each of the barbs is used to push into the anchor hole under the action of external force; the hollow grouting anchor rod has a grouting channel inside, and at least one grouting hole connected to the grouting channel is arranged on the outer wall of the hollow grouting anchor rod; the second end is provided with a grouting port connected to the grouting channel; when the hollow grouting anchor rod is located in the anchor hole, the flexible filler is used to fill between the outer side of the hollow grouting anchor rod and the inner wall of the anchor hole, and the flexible filler is located in the anchor hole near the anchor hole mouth; the flexible filler is breathable and water-permeable and the grouting liquid cannot penetrate the flexible filler; the tray is fixedly arranged on the outer wall of the hollow grouting anchor rod located outside the anchor hole, and the tray is pressed tightly against the surface of the supported structure.

[0007] Preferably, a plurality of anchor claws are fixedly provided on the first end of the hollow grouting anchor rod; the anchor claws are evenly arranged along the axial direction of the hollow grouting anchor rod; and a plurality of barbs are fixedly provided on the circumferential side wall of the anchor claws.

[0008] Preferably, the first end of the hollow grouting anchor has a first external thread; the anchor claw member includes a mounting nut and a plurality of barbs, each of the barbs being detachably fixed on the circumferential outer side wall of the mounting nut; and the mounting nut has a first internal thread threadably connected to the first external thread.

[0009] Preferably, a plurality of second internal threaded holes are provided on the outer side wall of the mounting nut, and a second external thread is provided at one end of the barb; the second external thread can be threadedly connected in one of the second internal threaded holes.

[0010] Preferably, a retaining ring is provided on the hollow grouting anchor rod, and the outer diameter of the retaining ring is larger than the outer diameter of the hollow grouting anchor rod; and the flexible filler is located between the retaining ring and the tray.

[0011] Preferably, the tray comprises a coaxially arranged disc and a truncated cone; the truncated cone is located on a side of the disc away from the flexible filler; and the disc is fixedly connected to the large end of the truncated cone.

[0012] Preferably, the tray is threadedly fixedly connected to the hollow grouting anchor rod; a fastening nut is threadedly connected to the hollow grouting anchor rod on a side of the tray away from the flexible filler.

[0013] Preferably, there are a plurality of drainage holes, and each of the drainage holes is distributed in a spiral shape around the axis of the hollow grouting anchor rod.

[0014] Preferably, the retaining ring is threadedly connected to the hollow grouting anchor rod, and the retaining ring is located at 0.2 mm to 0.3 mm in the anchor hole.

[0015] Preferably, the outer diameter of the retaining ring is 6 mm to 8 mm larger than the outer diameter of the hollow grouting anchor rod.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The anchor claw type grouting anchor rod provided by the utility model can enhance the anchoring force of the first end of the hollow grouting anchor rod in the anchor hole by arranging barbs on the hollow grouting anchor rod; the barbs can tightly grasp the surrounding rock and soil to prevent it from being easily pulled out, thereby improving the pull-out resistance; the grouting channel is convenient for the transportation of grouting liquid, and the grouting liquid can be smoothly injected into the rock and soil around the hollow grouting anchor rod; the grouting hole allows the grouting liquid to flow out from the inside of the hollow grouting anchor rod to fill the gap between the hollow grouting anchor rod and the anchor hole, thereby realizing the reinforcement of the rock and soil body; the flexible filler It allows moisture and gas in the anchor hole to be discharged, avoiding the adverse effects on the anchoring effect of the hollow grouting anchor rod due to the accumulation of moisture and gas; and the flexible filler can ensure that the grouting liquid is concentrated in the specific area between the hollow grouting anchor rod and the anchor hole, improving the grouting effect and efficiency; it prevents the grouting liquid from overflowing out of the anchor hole, avoiding waste and pollution to the surrounding environment; the tray is pressed tightly against the surface of the supported structure, so that the hollow grouting anchor rod can better play its supporting role, transfer the pressure of the rock and soil body to the supported structure, and improve the overall stability of the supporting structure.

[0018] Furthermore, multiple anchor claw members are evenly arranged along the axial direction of the hollow grouting anchor rod, which greatly increases the contact area between the hollow grouting anchor rod and the surrounding rock and soil; the evenly arranged anchor claw members make the force of the hollow grouting anchor rod in the anchor hole more uniform; the presence of barbs makes the connection between the hollow grouting anchor rod and the rock and soil body more secure, reduces the loosening and displacement of the hollow grouting anchor rod during use, and improves the overall stability of the anchoring system.

[0019] Furthermore, the threaded connection makes the installation and disassembly of the anchor claw part very convenient; the threaded connection has high connection strength and reliability; when the barb is worn, damaged or fails during use, the barb can be removed and replaced individually without replacing the entire anchor claw part or the hollow grouting anchor rod, thereby reducing maintenance costs and extending the service life of the hollow grouting anchor rod.

[0020] Furthermore, through the cooperation between the second external thread and the second internal threaded hole, the barb can be easily installed on the mounting nut; multiple barbs are evenly distributed on the outer wall of the mounting nut, which can increase the friction and bite force between the hollow grouting anchor rod and the surrounding rock and soil, thereby improving the anchoring force of the hollow grouting anchor rod.

[0021] Furthermore, the outer diameter of the retaining ring is larger than the outer diameter of the hollow grouting anchor rod, which can effectively limit the position of the flexible filler. Ensure that the flexible filler is stably located between the retaining ring and the tray, and will not shift during the grouting process or when subjected to external forces; the grouting liquid will preferentially fill the gap between the hollow grouting anchor rod and the anchor hole under pressure, and will not overflow excessively from the anchor hole; the flexible filler can play a buffering role when clamped by the retaining ring and the tray. When the anchor rod is impacted by external forces or the rock and soil body is deformed, the flexible filler can reduce the direct pressure on the surface of the supported structure and protect the supported structure from damage.

[0022] Furthermore, the disc is in contact with the surface of the supported structure, and the larger area can more evenly disperse the force from the anchor rods; the frustum is located on the side of the disc away from the flexible filler, and its shape characteristics enable the force from the anchor rods to be more smoothly transmitted from the frustum to the disc and then to the supported structure; the frustum can increase the overall structural strength of the pallet.

[0023] Furthermore, the threaded connection allows the position of the pallet to be adjusted according to actual needs during the installation process; due to the detachability of the threaded connection, the pallet can be disassembled and recycled after the use of the hollow grouting anchor; the fastening nut is threadedly connected to the hollow grouting anchor on the side of the pallet away from the flexible filler, which can enhance the connection stability between the pallet and the hollow grouting anchor, prevent the pallet from loosening due to vibration or external force during use, and ensure that the anchor system always maintains a firmly connected state.

[0024] Furthermore, multiple grouting holes increase the number of outflow channels for the grouting liquid, improve the grouting efficiency, and shorten the construction time; the spiral distribution of the grouting holes can guide the grouting liquid to flow in a spiral shape in the anchor hole. This flow pattern helps the grouting liquid to better penetrate into all directions of the rock and soil body, fully fill the gap between the hollow grouting anchor rod and the anchor hole, and improve the grouting quality.

[0025] Furthermore, the threaded connection makes the installation of the retaining ring very convenient. Construction personnel can quickly screw the retaining ring to the specified position of the hollow grouting anchor rod, and it has strong adjustability. The depth range of 0.2mm to 0.3mm has been carefully designed to ensure that there is sufficient contact area between the flexible filler and the inner wall of the anchor hole without affecting the installation and grouting process of the hollow grouting anchor rod.

[0026] Furthermore, the outer diameter of the retaining ring is 6 mm to 8 mm larger than the outer diameter of the hollow grouting anchor rod, which can provide a clear installation position boundary for the flexible filler and ensure a good and effective limiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the overall structure of the anchor claw type grouting anchor provided by the utility model;

[0029] Figure 2 A schematic diagram of the structure of the anchor claw member in the anchor claw type grouting anchor provided by the utility model;

[0030] Figure 3 The utility model is a schematic diagram of the structure of the retaining ring in the anchor claw type grouting anchor rod provided by the utility model.

[0031] In the figure:

[0032] 100-anchor claw type grouting anchor;

[0033] 10-hollow grouting anchor rod; 11-drainage hole;

[0034] 20-anchor claw; 21-barb; 22-mounting nut;

[0035] 30- retaining ring;

[0036] 40-tray; 41-disc; 42-round table;

[0037] 50-Tighten the nut. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] The utility model aims to provide an anchor claw type grouting anchor rod to solve the problems existing in the prior art, reduce the risk of falling off, and can be closely combined with the hole wall to improve the anchoring effect.

[0040] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] Embodiment 1

[0042] This embodiment provides an anchor claw type grouting anchor rod, such as Figure 1 to Figure 3 As shown, it includes a hollow grouting anchor rod 10, a flexible filler and a tray 40; the hollow grouting anchor rod 10 has a first end and a second end, and a plurality of barbs 21 are fixedly arranged on the circumferential outer wall of the first end; the first end with each barb 21 is used to be pushed into the anchor hole under the action of external force; the hollow grouting anchor rod 10 has a grouting channel inside, and at least one grouting hole 11 connected to the grouting channel is arranged on the outer wall of the hollow grouting anchor rod 10; the second end is provided with a grouting port connected to the grouting channel; when the hollow grouting anchor rod 10 is located in the anchor hole, the flexible filler is used to fill between the outer side of the hollow grouting anchor rod 10 and the inner wall of the anchor hole, and the flexible filler is located in the anchor hole near the anchor hole mouth; the flexible filler is breathable and water-permeable and the grouting liquid cannot penetrate the flexible filler; the tray 40 is fixedly arranged on the outer wall of the hollow grouting anchor rod 10 located outside the anchor hole, and the tray 40 is pressed tightly against the surface of the supported structure.

[0043] By arranging the barbs 21 on the hollow grouting anchor rod 10, the anchoring force of the first end of the hollow grouting anchor rod 10 in the anchor hole can be enhanced; the barbs 21 can tightly grasp the surrounding rock and soil to prevent it from being easily pulled out, thereby improving the pull-out resistance; the grouting channel facilitates the transportation of the grouting liquid, and the grouting liquid can be smoothly injected into the rock and soil around the hollow grouting anchor rod 10; the grouting hole 11 allows the grouting liquid to flow out from the inside of the hollow grouting anchor rod 10, filling the gap between the hollow grouting anchor rod 10 and the anchor hole, thereby achieving reinforcement of the rock and soil; the flexible filler allows the anchor hole to be The moisture and gas in the hollow grouting anchor 10 are discharged to avoid the adverse effects on the anchoring effect of the hollow grouting anchor rod 10 due to the accumulation of moisture and gas; and the flexible filler can ensure that the grouting liquid is concentrated in the specific area between the hollow grouting anchor rod 10 and the anchor hole, thereby improving the grouting effect and efficiency; preventing the grouting liquid from overflowing out of the anchor hole, avoiding waste and pollution to the surrounding environment; the tray 40 is pressed tightly against the surface of the supported structure, so that the hollow grouting anchor rod 10 can better play a supporting role, transfer the pressure of the rock and soil body to the supported structure, and improve the overall stability of the supporting structure.

[0044] Among them, the relevant setting instructions for the hollow grouting anchor 10 are as follows:

[0045] In the optional scheme of this embodiment, it is more preferred that there are multiple grouting holes 11, and each grouting hole 11 is spirally distributed around the axis of the hollow grouting anchor rod 10. Multiple grouting holes 11 increase the number of outflow channels for the grouting liquid, improve the grouting efficiency, and shorten the construction time; the spiral distribution of the grouting holes 11 can guide the grouting liquid to flow in a spiral shape in the anchor hole. This flow mode helps the grouting liquid to better penetrate into all directions of the rock and soil body, fully fill the gap between the hollow grouting anchor rod 10 and the anchor hole, and improve the grouting quality.

[0046] Among them, the relevant setting description of the fluke member 20 is as follows:

[0047] In the optional scheme of this embodiment, it is more preferred that Figure 1 As shown, a plurality of anchor claws 20 are fixedly provided at the first end of the hollow grouting anchor rod 10; each anchor claw 20 is evenly arranged along the axial direction of the hollow grouting anchor rod 10; and a plurality of barbs 21 are fixedly provided on the circumferential side wall of the anchor claw 20. The plurality of anchor claws 20 are evenly arranged along the axial direction of the hollow grouting anchor rod 10, which greatly increases the contact area between the hollow grouting anchor rod 10 and the surrounding rock and soil; the evenly arranged anchor claws 20 make the force of the hollow grouting anchor rod 10 in the anchor hole more uniform; the presence of the barbs 21 makes the connection between the hollow grouting anchor rod 10 and the rock and soil body more firm, reduces the loosening and displacement of the hollow grouting anchor rod 10 during use, and improves the overall stability of the anchoring system.

[0048] In the optional scheme of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the first end of the hollow grouting anchor rod 10 has a first external thread; the anchor claw member 20 includes a mounting nut 22 and a plurality of barbs 21, each barb 21 being detachably fixedly arranged on the circumferential outer wall of the mounting nut 22; the mounting nut 22 has a first internal thread threadedly connected to the first external thread. The threaded connection makes the installation and removal of the anchor claw member 20 very convenient; the threaded connection has high connection strength and reliability; when the barb 21 is worn, damaged or fails during use, the barb 21 can be removed and replaced separately without replacing the entire anchor claw member 20 or the hollow grouting anchor rod 10, thereby reducing maintenance costs and extending the service life of the hollow grouting anchor rod 10.

[0049] In the optional scheme of this embodiment, it is more preferred that a plurality of second internal thread holes are provided on the outer wall of the mounting nut 22, and a second external thread is provided at one end of the barb 21; the second external thread can be threadedly connected in a second internal thread hole. Through the cooperation of the second external thread and the second internal thread hole, the barb 21 can be easily installed on the mounting nut 22; the plurality of barbs 21 are evenly distributed on the outer wall of the mounting nut 22, which can increase the friction and bite force between the hollow grouting anchor rod 10 and the surrounding rock and soil, thereby improving the anchoring force of the hollow grouting anchor rod 10.

[0050] Specifically, the angle between the axis of the barb 21 and the axis of the hollow grouting anchor 10 is 15°; when the side wall of the mounting nut 22 is six-sided, each side wall surface is parallel to the axis of the hollow grouting anchor 10, and the angle between the axis of the barb 21 and the side wall corresponding to the mounting nut 22 is 15°.

[0051] Specifically, the structural dimensions of the fluke member 20 can be set according to the anchor hole.

[0052] The related structures of the retaining ring 30, the flexible filler and the tray 40 are described as follows:

[0053] In the optional scheme of this embodiment, it is more preferred that Figure 1 and Figure 3 As shown, a retaining ring 30 is provided on the hollow grouting anchor rod 10, and the outer diameter of the retaining ring 30 is larger than the outer diameter of the hollow grouting anchor rod 10; the flexible filler is located between the retaining ring 30 and the tray 40. The outer diameter of the retaining ring 30 is larger than the outer diameter of the hollow grouting anchor rod 10, which can effectively limit the position of the flexible filler. Ensure that the flexible filler is stably located between the retaining ring 30 and the tray 40, and will not shift during the grouting process or when subjected to external forces; under the action of pressure, the grouting liquid will preferentially fill the gap between the hollow grouting anchor rod 10 and the anchor hole, and will not overflow excessively from the anchor hole mouth; the flexible filler can play a buffering role when clamped by the retaining ring 30 and the tray 40. When the anchor rod is impacted by external forces or the rock and soil body is deformed, the flexible filler can reduce the direct pressure on the surface of the supported structure and protect the supported structure from damage.

[0054] In the optional scheme of this embodiment, it is more preferred that the retaining ring 30 is threadedly connected to the hollow grouting anchor rod 10, and the retaining ring 30 is located at 0.2mm to 0.3mm in the anchor hole. The threaded connection method makes the installation of the retaining ring 30 very convenient, and the construction personnel can quickly screw the retaining ring 30 to the specified position of the hollow grouting anchor rod 10, and the adjustability is strong; the depth range of 0.2mm to 0.3mm is carefully designed, which can ensure that there is enough contact area between the flexible filler and the inner wall of the anchor hole, and will not affect the installation and grouting process of the hollow grouting anchor rod 10.

[0055] In the optional scheme of this embodiment, it is more preferred that the outer diameter of the retaining ring 30 is 6mm to 8mm larger than the outer diameter of the hollow grouting anchor rod 10. The outer diameter of the retaining ring 30 is 6mm to 8mm larger than the outer diameter of the hollow grouting anchor rod 10, which can provide a clear installation position boundary for the flexible filler and ensure a good and effective limiting effect.

[0056] Specifically, the flexible filler is a water-permeable and breathable material such as sponge.

[0057] In the optional scheme of this embodiment, it is more preferred that Figure 1As shown, the tray 40 is threadedly fixedly connected to the hollow grouting anchor rod 10; a fastening nut 50 is threadedly connected to the hollow grouting anchor rod 10 on the side of the tray 40 away from the flexible filler. The threaded connection allows the tray 40 to be adjusted according to actual needs during installation; due to the detachability of the threaded connection, the tray 40 can be disassembled and recycled after the hollow grouting anchor rod 10 is used; the fastening nut 50 is threadedly connected to the hollow grouting anchor rod 10 on the side of the tray 40 away from the flexible filler, which can enhance the connection stability between the tray 40 and the hollow grouting anchor rod 10, prevent the tray 40 from loosening due to vibration or external force during use, and ensure that the anchor rod system always maintains a firmly connected state.

[0058] In the optional scheme of this embodiment, it is more preferred that Figure 1 As shown, the tray 40 includes a coaxially arranged disc 41 and a truncated cone 42; the truncated cone 42 is located on the side of the disc 41 away from the flexible filler; the disc 41 is fixedly connected to the large end of the truncated cone 42. The disc 41 contacts the surface of the supported structure, and the larger area can more evenly disperse the force from the anchor rod; the truncated cone 42 is located on the side of the disc 41 away from the flexible filler, and its shape characteristics enable the force from the anchor rod to be more smoothly transmitted from the truncated cone 42 to the disc 41, and then to the supported structure; the truncated cone 42 can increase the overall structural strength of the tray 40.

[0059] Among them, about other related settings description:

[0060] Specifically, relevant dimensions can be set according to actual needs. For example, the length of the hollow grouting anchor rod 10 is 3m, the outer diameter of the rod body is 25mm, the wall thickness of the rod body is 5.5mm, the thread spacing of the rod body is 10mm, and the number of grouting holes 11 is 5; the mounting nut 22 of the anchor claw member 20 is 5mm thick and 20mm long, the barb 21 is 10mm long, and the angle between the axis of the barb 21 and the axis of the hollow grouting anchor rod 10 is 15°; 5 anchor claw members 20 are arranged on the hollow grouting anchor rod 10, and each anchor claw member 20 is spaced 0.1m apart.

[0061] Specifically, the method of using the anchor claw type grouting anchor rod of this embodiment is as follows:

[0062] 1. Install the anchor claws 20 at the front end of the hollow grouting anchor rod 10 in sequence, with an interval of 0.1m;

[0063] 2. Install a retaining ring 30 at the tail end of the hollow grouting anchor rod 10, located 0.2-0.3m inside the anchor hole;

[0064] 3. Use a drilling rig to push the installed hollow grouting anchor rod 10 into the anchor hole;

[0065] 4. Fill the anchor hole with the flexible filler, with one end of the flexible filler inside the anchor hole pressed tightly against the retaining ring 30 and the other end extending 0.1m beyond the anchor hole;

[0066] 5. Install and fix the tray 40 and the fastening nut 50, and apply pre-tightening force;

[0067] 6. Grouting: fill the anchor hole through the grouting hole 11 and judge the grouting effect based on the backwater situation.

[0068] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An anchor claw type grouting anchor, characterized in that: Includes hollow grouting anchors, flexible fillers and trays; The hollow grouting anchor has a first end and a second end, and a plurality of barbs are fixedly arranged on the circumferential outer wall of the first end; the first end with the barbs is used to be pushed into the anchor hole under the action of external force; The hollow grouting anchor has a grouting channel inside, and the outer wall of the hollow grouting anchor is provided with at least one grouting hole connected to the grouting channel; the second end is provided with a grouting port connected to the grouting channel; When the hollow grouting anchor rod is located in the anchor hole, the flexible filler is used to fill between the outer side of the hollow grouting anchor rod and the inner wall of the anchor hole, and the flexible filler is located in the anchor hole near the anchor hole mouth; the flexible filler is air-permeable and water-permeable, and the grouting liquid cannot penetrate the flexible filler; The tray is fixedly arranged on the outer side wall of the hollow grouting anchor rod outside the anchor hole, and the tray is tightly pressed against the surface of the supported structure.

2. The anchor claw type grouting anchor according to claim 1, characterized in that: A plurality of anchor claws are fixedly provided on the first end of the hollow grouting anchor rod; the anchor claws are evenly arranged along the axial direction of the hollow grouting anchor rod; A plurality of barbs are fixedly arranged on the circumferential side wall of the fluke member.

3. The anchor claw type grouting anchor according to claim 2, characterized in that: The first end of the hollow grouting anchor has a first external thread; The fluke member includes a mounting nut and a plurality of barbs, each of which is detachably fixed on a circumferential outer side wall of the mounting nut; The mounting nut has a first internal thread threadably connected to the first external thread.

4. The anchor claw type grouting anchor according to claim 3, characterized in that: A plurality of second internal thread holes are arranged on the outer side wall of the mounting nut, and a second external thread is arranged at one end of the barb; The second external thread can be threadedly connected into one of the second internal threaded holes.

5. The anchor claw type grouting anchor according to claim 1, characterized in that: The hollow grouting anchor rod is provided with a retaining ring, and the outer diameter of the retaining ring is larger than the outer diameter of the hollow grouting anchor rod; The flexible filler is located between the retaining ring and the tray.

6. The anchor claw type grouting anchor according to claim 1, characterized in that: The tray comprises a coaxially arranged disc and a frustum; The truncated platform is located at a side of the circular disc away from the flexible filler; the circular disc is fixedly connected to the large end of the truncated platform.

7. The anchor claw type grouting anchor according to claim 1, characterized in that: The tray is threadedly fixedly connected to the hollow grouting anchor rod; A fastening nut is threadedly connected to the hollow grouting anchor rod on the side of the tray away from the flexible filler.

8. The anchor claw type grouting anchor according to claim 1, characterized in that: There are multiple grouting holes, and each of the grouting holes is distributed in a spiral shape around the axis of the hollow grouting anchor rod.

9. The anchor claw type grouting anchor according to claim 5, characterized in that: The retaining ring is threadedly connected to the hollow grouting anchor rod, and the retaining ring is located at 0.2mm to 0.3mm in the anchor hole.

10. The anchor claw type grouting anchor according to claim 5, characterized in that: The outer diameter of the retaining ring is 6 mm to 8 mm larger than the outer diameter of the hollow grouting anchor rod.

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