Multifunctional end-bearing type anchor rod structure capable of being quickly disassembled and assembled

Abstract

The utility model discloses a multifunctional end-bearing type anchor rod structure capable of being quickly disassembled and assembled, which belongs to the technical field of anchor rod support and comprises an anchor rod body, a sleeve is sleeved on the anchor rod body, an anchor rod chassis is fixed at one end of the anchor rod body, and one side of the anchor rod chassis far away from the sleeve is fixedly connected with an anchor rod tip; a plurality of barbs are hinged between one side, facing the sleeve, of the anchor rod chassis and the sleeve; a limiting ring is arranged between the sleeve and the anchor rod base plate and on the anchor rod body, and the diameter of the limiting ring is larger than that of the sleeve. Opposite guide rails are arranged in the sleeve, opposite guide grooves are formed in the anchor rod body, away from the anchor rod base plate, of the limiting ring, and the guide rails are used in cooperation with the guide grooves. And grouting holes are formed in the sleeve and the anchor rod main body. The multiple barbs are hinged between the anchor rod body and the sleeve, through cooperation of the limiting rings, the effects of recycling and anchor rod falling prevention can be achieved, and the barbs can be opened at the optimal opening angle; the grouting holes are formed in the anchor rod body and the sleeve, grouting can be conducted, and the anchor rod can be used as a permanent structure.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of anchor rod support, specifically relates to a multifunctional end bearing type anchor rod structure of quick assembly and disassembly. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] Anchor rod technology is a supporting technology widely used in fields such as geotechnical engineering, tunnel engineering and bridge engineering.

[0004] Traditional anchor rod construction is usually mainly grouting construction, and the following problems exist: 1) it needs to go through pouring, curing and other processes, which leads to a long time for anchor rod to play a role and delays the construction period; 2) anchor rod sinking or loosening problem is prone to occur; 3) it cannot be recycled and reused, and is not environmentally friendly.

[0005] To solve the above technical problems, patent CN111794223A discloses a rain umbrella retracting type anti-falling anchor rod structure and use method, which is characterized by sleeving a sleeve on the anchor rod body, hinging an umbrella arm between the sleeve and the anchor rod body, opening the umbrella arm to make the umbrella arm fully embedded in the rock-soil body, so as to realize the effects of recycling and preventing anchor rod from falling off.

[0006] However, the above-mentioned scheme still has the following technical problems:

[0007] 1) Although it can be recycled, it does not consider the use in soft rock or soft soil layer, and still needs to cooperate with grouting;

[0008] 2) The opening degree of the umbrella arm does not consider the optimal opening range, and it is easy to cause complete bending moment to cause damage; especially when reaming, the umbrella arm will be opened to the perpendicular state of the anchor rod, which is easy to break and lose the function;

[0009] 3) There is no measure to avoid the self-rotation offset of the sleeve between the sleeve and the anchor rod, and when reaming, the anchor rod drives the umbrella arm to rotate, and since the sleeve end has no measure to limit the rotation, and the umbrella arm is blocked by the soil layer, it is easy to drive the sleeve to rotate to a certain extent. UTILITY MODEL CONTENTS

[0010] To solve the above problems, the utility model provides a kind of multifunctional end bearing type anchor rod structure of quick disassembly and assembly, can be articulated multiple barbs between anchor rod body and sleeve, and by the cooperation of fixed backing plate, limit ring, fixed nut, not only can realize recycling, prevent the effect of anchor rod drop, but also can make barb open best open angle, effectively prevent barb over opening, avoid the bending moment caused by opening angle too large and lead to anchoring failure;Meanwhile, anchor rod body and sleeve are all provided with grouting hole, anchor rod body and sleeve between limit guide rail guide groove of mutual rotation, not only prevent sleeve and anchor rod body relative rotation, ensure that grouting hole is not dislocation, prevent sleeve from rotating to a certain extent when reaming simultaneously;Through anchor head reaming in soft soil layer, then grouting is carried out, as permanent structure is used, use purpose is various, change the drawbacks of original anchor rod single use mode.

[0011] To achieve the above object, the utility model adopts the following technical scheme:

[0012] A kind of multifunctional end bearing type anchor rod structure of quick disassembly and assembly, including anchor rod body, sleeve is set on anchor rod body, one end of anchor rod main body is fixed anchor rod chassis, anchor rod chassis is fixedly connected anchor rod tip end on the side away from sleeve;Several barbs are articulated between the side of anchor rod chassis towards sleeve and sleeve;

[0013] Between sleeve and anchor rod chassis, limit ring is arranged on anchor rod body, and the diameter of limit ring is greater than the diameter of sleeve;Opposite guide rail is arranged in sleeve, and opposite guide groove is arranged on the anchor rod body away from anchor rod chassis of limit ring, and guide rail and guide groove are matched for use;

[0014] Sleeve and anchor rod main body are all provided with grouting hole.

[0015] Preferably, the sleeve is provided with a sleeve chassis at one end, and two rows of opposite grouting holes are provided on the sleeve body.

[0016] Preferably, a plurality of groups of bolt holes are provided on the sleeve chassis and the anchor rod chassis, each group has two bolt holes, and the spacing between each group of bolt holes is equal.

[0017] Preferably, the disc surface on the side of the sleeve chassis away from the sleeve and the disc surface on the side of the anchor rod chassis towards the sleeve are both fixedly connected with L-shaped ear plates through bolt holes.

[0018] Preferably, the ear plate is composed of two mutually perpendicular plates, and bolt holes are provided on each plate.

[0019] Preferably, the ear plate on the anchor rod chassis is articulated with a barb, and the ear plate on the sleeve chassis is articulated with a connecting rod.

[0020] The barb has a pointed end, a first connecting hole is arranged in the middle of the barb, a second connecting hole is arranged at the other end of the barb, the barb is hinged with the lug plate of the anchor rod base through the second connecting hole; a third connecting hole is arranged at each end of the connecting rod, one of the third connecting holes is hinged with the lug plate of the sleeve bottom disc, and the other third connecting hole is hinged with the first connecting hole.

[0021] Preferably, the anchor rod body is a hollow grouting pipe, and the inside of the anchor rod body is a grouting channel; the other end of the anchor rod body away from the anchor rod base is opened and provided with a threaded section, a fixing nut and a fixing pad are arranged on the threaded section, and the size of the fixing pad is greater than the diameter of the sleeve.

[0022] Preferably, the fixing pad is provided with two concentric circles in the center, the small circle is penetrated, the diameter is consistent with the diameter of the anchor rod body and is smaller than the diameter of the sleeve; and the large circle is not penetrated on the side of the small circle and serves as a fixing nut groove.

[0023] Preferably, the grouting holes between the limiting ring and the anchor rod base are uniformly distributed on the anchor rod body; and the grouting holes between the limiting ring and the threaded section are divided into two rows in opposite directions.

[0024] Compared with the prior art, the anchor rod structure has the advantages and positive effects that:

[0025] The anchor rod structure can realize recycling and prevent the anchor rod from falling off, and the barb can be opened to the best opening angle, so that the barb is effectively prevented from being opened too much, and the anchor rod is prevented from being damaged due to the too large opening angle and the bending moment; meanwhile, the anchor rod body and the sleeve are provided with grouting holes, and the anchor rod body and the sleeve are provided with guide grooves for limiting mutual rotation, so that the sleeve and the anchor rod body are prevented from rotating relatively, the grouting holes are prevented from being dislocated, the barb is prevented from being damaged due to the rotation of the sleeve during reaming, and the anchor rod is used as a permanent structure after reaming and grouting in the soft soil layer, so that the anchor rod has various uses and the disadvantages of the single use of the original anchor rod are changed. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings constituting a part of the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation on the present application.

[0027] Figure 1 is a schematic view of an initial state of the anchor rod structure of the embodiment 1 of the present application;

[0028] Figure 2 is a schematic view of the anchor rod body of the embodiment 1 of the present application;

[0029] Figure 3 is a schematic view of the sleeve of the utility model embodiment 1;

[0030] Figure 4 is the right view in the utility model embodiment 1 of Figure 3 ;

[0031] Figure 5 is the A-A section view in the utility model embodiment 1 of Figure 1 ;

[0032] Figure 6 is the schematic view of barb of the utility model embodiment 1;

[0033] Figure 7 is the schematic view of connecting rod of the utility model embodiment 1;

[0034] Figure 8 is the schematic view of fixed base plate of the utility model embodiment 1;

[0035] Figure 9 is the schematic view of anchor rod structure open state of the utility model embodiment 1;

[0036] In the figure:

[0037] 1, anchor rod body;11, anchor rod base plate;111, bolt hole;112, ear plate;113, bearing bolt;12, grouting hole;13, threaded section;14, fixed nut;15, limiting ring;16, fixed base plate;2, sleeve;21, sleeve base plate;3, barb;31, first connecting hole;32, second connecting hole;4, connecting rod;41, third connecting hole;5, anchor rod tip. DETAILED DESCRIPTION

[0038] It should be noted that the following detailed description is exemplary, and is intended to provide further explanation of the utility model. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as ordinarily understood by one of ordinary skill in the art to which the utility model belongs.

[0039] The utility model is described in detail below with reference to the drawings, and the embodiment disclosed by the utility model is a multifunctional end bearing type anchor rod structure that can be quickly disassembled, as shown in Figure 1 , comprising anchor rod body 1, sleeve 2 is sleeved on anchor rod body 1, and the diameter of sleeve 2 is greater than that of anchor rod body 1;Anchor rod base plate 11 is fixedly arranged at one end of anchor rod body 1, and a plurality of barbs 3 are hinged between the side of anchor rod base plate 11 facing sleeve 2 and the sleeve;Anchor rod tip 5 is fixedly connected to the side of anchor rod base plate 11 away from sleeve 2. Figure 2 As shown in , a plurality of groups of bolt holes 111 are uniformly arranged on the disc surface of anchor rod base plate 11, each group has two, and the spacing between each group of bolt holes is equal.

[0040] like Figure 1 , Figure 5 As shown, multiple barbs are evenly distributed on the anchor base plate. In this embodiment, there are four barbs, so the anchor base plate has four sets of bolt holes, that is, eight bolt holes. The anchor base plate is hinged to the barbs. Specifically, on the anchor base plate 11 facing the sleeve side, the bolt holes 111 are all fixedly connected to L-shaped ear plates 112 by bolts. The ear plates 112 are composed of two mutually perpendicular flat plates, and each flat plate has bolt holes of the same size as the bolt holes 111. A bearing bolt 113 passes through the ear plates 112 connected to each set of bolt holes 111, and the barbs 3 are rotatably connected to the bearing bolt 113.

[0041] like Figure 6 As shown, one end of the barb 3 is a pointed tip, a first connecting hole 31 is provided in the middle of the barb, and a second connecting hole 32 is provided at the other end. The second connecting hole 32 is positioned between the ear plates 112 of the same group of bolt holes 111, and then the bearing bolt 113 passes through to complete the hinge connection between the barb 3 and the anchor base 11. It can be understood that the thickness of the barb 3 is less than the distance between the ear plates 112 of the same group of bolt holes 111, thereby ensuring that the barb can rotate relative to the ear plates.

[0042] like Figure 1 , Figure 3 As shown, a sleeve base plate 21 is provided at one end of the sleeve 2. Two rows of opposite grouting holes 12 are provided on the sleeve body of the sleeve 2. On the surface of the sleeve base plate 21, several sets of bolt holes 111 are also evenly provided. There are two bolt holes in each set, and the spacing between each set of bolt holes is equal, which is consistent with the spacing between each set of bolt holes on the anchor base plate.

[0043] Similarly, on the side of the sleeve base 21 away from the sleeve, a lug is also connected to the bolt hole 111, and bearing bolts are also installed between the lugs. The difference is that the hinge on the sleeve base 21 is not a barb 3, but a connecting rod 4. Figure 7 As shown, both ends of the connecting rod 4 are provided with third connecting holes 41. One of the third connecting holes 41 is positioned between the lugs on the sleeve base 21, and a bearing bolt passes through to complete the hinge connection between the connecting rod and the sleeve base 21. Then, the other third connecting hole 41 is aligned with the first connecting hole 31 and hinged by a pin, thereby achieving a rotatable connection between the barb and the connecting rod. It can be understood that the thickness of the connecting rod is the same as the thickness of the barb. Figure 9 As shown, when the sleeve is pushed toward the anchor base, the sleeve drives the connecting rod to move, thereby opening the barbs.

[0044] like Figure 2As shown, the anchor body 1 is a hollow grouting pipe with grouting channels inside. Grouting holes 12 are provided on the shaft of the anchor body 1. A threaded section 13 is provided at the other end of the anchor body 1 away from the anchor base. A fixing nut 14 and a fixing washer 16 are provided on the threaded section 13. The size of the fixing washer 16 is larger than the diameter of the sleeve 2. Figure 8 As shown, the center of the fixing plate has two concentric circles of different sizes. The smaller circle goes through the entire plate and has the same diameter as the anchor rod body, but smaller than the sleeve diameter. The larger circle does not go through the smaller circle and serves as a groove for fixing the nut.

[0045] like Figure 2 As shown, the threaded section is open at the end furthest from the anchor bolt base. This threaded section can connect to an external grouting device, allowing cement slurry to flow out through the grouting channel. It can also connect to a drilling rig, enabling the drilling rig to drive the anchor bolt body for hole enlargement. Between the sleeve and the anchor bolt base, a limiting ring 15 is also provided on the anchor bolt body 1. The diameter of the limiting ring 15 is larger than the diameter of the sleeve 2. When the sleeve is fitted onto the outside of the anchor bolt body 1 from the end with the threaded section 13, it moves towards the anchor bolt base and is stopped at the limiting ring 15, causing the barbs to open to their maximum angle. It is understood that the outer diameter of the limiting ring 15 must meet the requirement that when the limiting ring contacts the sleeve base, the ear plate on the sleeve base is located outside the limiting ring.

[0046] like Figure 2 As shown, in this embodiment, the grouting holes 12 between the limiting ring 15 and the anchor base 11 are evenly distributed on the anchor body; the grouting holes 12 between the limiting ring 15 and the threaded section 13 are divided into two opposing rows, just like the grouting holes on the sleeve 2.

[0047] In this embodiment, when the tip of the anchor rod reaches the designated position, a fixing pad is fitted onto the threaded section. Then, the anchor rod body is pulled outward along the direction perpendicular to the fixing pad. Since the diameter of the sleeve is larger than the hole diameter of the fixing pad, the sleeve presses against the fixing pad during the pulling out process. The anchor rod body and the sleeve move relative to each other, and the barbs gradually open and penetrate the soil. Then, a fixing nut is set on the threaded section, and the fixing nut is turned to move into the fixing nut groove of the fixing pad, thereby fixing the position of the sleeve and preventing it from resetting.

[0048] In this embodiment, the length from the end of the threaded section 13 facing the anchor base to the limiting ring 15 is equal to the length of the sleeve 2, or the length from the end of the threaded section 13 away from the anchor base to the limiting ring 15 is greater than the length of the sleeve 2. This is to allow sufficient space for the installation of the fixing nut 14 and the fixing washer 16.

[0049] It can be understood that the setting position of the limiting ring 15 needs to be actually considered according to the actual barb, the length of the connecting rod, and the position of each connecting hole, but no matter how to set, the sleeve is stopped when reaching the limiting ring and no longer moves towards the anchor rod base, at this time, the barb opens the maximum angle, which is also the best opening angle. In the embodiment, the maximum opening angle of the barb is 60°, so as not to be completely subjected to bending moment and be damaged.

[0050] It should be noted that, because the anchor rod of the embodiment can be used for grouting, in order to ensure the grouting effect, it is necessary to ensure that the grouting holes of the anchor rod body and the sleeve correspond, and in the direction of the compliant rod body, the grouting holes of the anchor rod body and the sleeve can correspond when the sleeve reaches the limiting ring; but when the anchor rod is rotated and reamed, it is also necessary to ensure that the anchor rod body and the sleeve do not occur rotational misalignment, so guide rails and guide grooves are arranged between the sleeve and the anchor rod body.

[0051] As shown in Figure 2 , Figure 3 , Figure 4 , two guide rails are arranged in the sleeve, and a guide groove is arranged on the anchor rod body, so that the rotational misalignment between the anchor rod body and the sleeve can be prevented; at the same time, the grouting holes of the anchor rod body and the sleeve can be prevented from misaligning, and the grouting effect can be ensured. It can also prevent the barb from rotating to a certain extent when reaming, which can cause the barb to be damaged. It can be understood that the setting position of the guide rail and the guide groove needs to avoid the grouting hole, and in the embodiment, the guide rail and the guide groove are arranged on the vertical line of the connecting line between the two rows of grouting holes.

[0052] In one embodiment, the specific dimensions can be set as follows: the anchor rod body is 0.7 m long and 30 mm in diameter, the limiting ring is arranged at a distance of 160 mm from the anchor rod base, and the outer diameter is 50 mm; the anchor rod base is 100 mm in outer diameter and 10 mm in thickness, the threaded segment is 30 cm long, and the grouting hole is 15 mm in diameter. It can be understood that the diameter of the grouting hole is adjusted according to the diameter of the anchor rod body under the condition of ensuring the stress of the anchor rod body. The sleeve is 0.5 m long, 32 mm in inner diameter, and 40 mm in outer diameter. The sleeve base is 100 mm in outer diameter and 30 mm in thickness; the grouting hole is 20 mm in diameter, and the grouting hole spacing is 10 cm. The barb is a steel plate with a total length of 200 mm, a width of 10 mm, and a thickness of 15 mm, has excellent bending and shear resistance, and has two connecting holes with a diameter of 5 mm, which are respectively 5 mm and 100 mm away from the left edge, and the barb tip is a 30° isosceles triangle with a side length of 15 mm, which is used to penetrate into the soil. The connecting rod is 150 mm long, 15 mm wide, and 10 mm thick, and the connecting holes at both ends are also 5 mm in diameter and 10 mm away from the two ends. The fixing pad is 120 mm long, 100 mm wide, and 10 mm thick, and the fixing pad is provided with two concentric circles at the center, the small circle penetrates, the diameter is consistent with the inner rod diameter, which is 30 mm, and smaller than the sleeve diameter; the large circle does not penetrate on the side of the small circle, and the thickness is 5 mm, which is used as a fixing nut groove to fix the position of the fixing nut and indirectly fix the position of the anchor rod body. It can be understood that in some embodiments, the fixing pad can be appropriately enlarged in size to withstand greater soil extrusion pressure.

[0053] It can be understood that all the components described above can be prefabricated in the factory.

[0054] Installation implementation steps:

[0055] Step 1: According to the design requirements of the drawings, determine the specifications and sizes of each component of the barb anchor rod device, process each component in the factory, and assemble on site.

[0056] Step 2: Drilling, after drilling with a drilling machine, clean the hole, place the anchor rod into the anchor hole, and when the anchor rod tip reaches the specified depth, fix the anchor rod.

[0057] Step 3: Fix the anchor rod, install the fixing pad after the anchor rod tip is fixed at the specified position, pull the anchor rod body outward along the vertical direction of the fixing pad, and the barb gradually opens and penetrates into the soil until the sleeve is stopped by the limiting ring, the barb is opened to 60 degrees, and the anchoring process is completed.

[0058] Step 4: Continue to slowly pull the anchor rod body to apply pre-stress until the specified pre-stress is set, and then install and tighten the fixing nut. A waist beam can be added between the fixing pad and the soil to make the fixing pad more stable under stress and prevent the fixing pad and the anchor rod from sinking into the soil.

[0059] If the anchor rod is regarded as a recyclable device, the above installation process can be completed, when recycling, first open the fixed nut, then remove the fixed base plate, push the inner rod of the anchor rod along the anchor hole inward while pulling the sleeve outward, and then fold the barb back to the original position after recycling, and then the anchor rod can be pulled out from the anchor hole to realize recycling.

[0060] If it is applied to soft soil layer as a permanent structure, after the above steps are completed, the fifth step is needed to connect the threaded segment with the drilling machine, and the anchor rod body is rotated by the drilling machine, thereby rotating the expanded barb, so that the anchor rod serves as a reaming device to expand the space of the anchor head part.

[0061] The sixth step is to connect the anchor rod body with the grouting device, pump the slurry into the inside of the anchor rod body, and grout through the grouting hole to fill the anchor hole and the enlarged anchor head end, so as to enhance the anchoring force of the anchor rod; the entire anchor rod device can be used as a tensile structure to greatly improve the pullout resistance of the anchor rod.

[0062] The anchor rod device has multiple purposes: it can be recycled for short-term use, and it can be grouted for permanent structure use, and it has multiple uses, which changes the disadvantages of the original single use mode of the anchor rod; when used as a permanent structure, the anchor head segment can be reamed; the limiting ring is added to effectively prevent the barb from being excessively expanded, and to avoid anchor failure caused by excessive bending moment due to excessive expansion angle; the guide rail guide groove is set to prevent the sleeve from rotating relative to the anchor rod body, to ensure that the grouting hole is not dislocated, and to prevent the sleeve from rotating to a certain extent when reaming.

[0063] Although the specific embodiments of the utility model have been described above in combination with the drawings, it is not a limitation on the protection scope of the utility model, and those skilled in the art should understand that various modifications or deformations made by those skilled in the art on the basis of the technical solutions of the utility model without creative labor are still within the protection scope of the utility model.

Claims

1. A multi-functional end-bearing type anchor rod structure capable of quick assembly and disassembly, characterized in that, The anchor rod body is sleeved with a sleeve, one end of the anchor rod body is fixed with an anchor rod base, and the anchor rod base is fixedly connected with an anchor rod tip on the side away from the sleeve; A limiting ring is arranged on the anchor rod body between the sleeve and the anchor rod base, the diameter of the limiting ring is larger than the diameter of the sleeve; opposite guide rails are arranged in the sleeve, and opposite guide grooves are arranged on the anchor rod body away from the anchor rod base, and the guide rails and the guide grooves are matched for use; The sleeve and the anchor rod body are both provided with grouting holes.

2. A multi-functional end-bearing type anchor rod structure capable of quick assembly and disassembly according to claim 1, characterized in that, One end of the sleeve is provided with a sleeve base, and two rows of opposite grouting holes are arranged on the sleeve body.

3. A quick detachable multi-functional end-bearing type anchor rod structure according to claim 2, characterized in that, The sleeve base and the anchor rod base are both provided with a plurality of groups of bolt holes, each group has two bolt holes, and the spacing between the bolt holes in each group is equal.

4. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 2, wherein, The bolt holes on the disc surface of the side of the sleeve base away from the sleeve and the disc surface of the side of the anchor rod base toward the sleeve are fixedly connected with L-shaped ear plates through bolts.

5. A quick detachable multi-functional end-bearing type anchor rod structure according to claim 4, characterized in that, The ear plate is composed of two mutually perpendicular plates, and bolt holes are arranged on each plate; a bearing bolt is arranged between the ear plates connected by each group of bolt holes.

6. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 2, wherein, The ear plate on the anchor rod base is hingedly connected with a barb, and the ear plate on the sleeve base is hingedly connected with a connecting rod.

7. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 6, wherein, The barb has a pointed end, a first connecting hole is arranged in the middle of the barb, and a second connecting hole is arranged at the other end, the barb is hingedly connected with the ear plate of the anchor rod base through the second connecting hole; the connecting rod has a third connecting hole at each end, one of the third connecting holes is hingedly connected with the ear plate of the sleeve base, and the other third connecting hole is hingedly connected with the first connecting hole.

8. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 1, wherein, The anchor rod body is a hollow grouting pipe, and the inside is a grouting channel; the other end of the anchor rod body away from the anchor rod base is open and provided with a threaded section, a fixing nut and a fixing pad plate are arranged on the threaded section, and the size of the fixing pad plate is larger than the diameter of the sleeve.

9. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 8, wherein, The fixing pad plate is provided with two concentric circles, a small circle penetrates through the center, the diameter is consistent with the diameter of the anchor rod body and smaller than the diameter of the sleeve; a large circle does not penetrate through on the side of the small circle and serves as a fixing nut groove.

10. A quick detachable multi-functional end-bearing type anchor rod structure as claimed in claim 8, wherein, The grouting holes between the limiting ring and the anchor rod base are uniformly distributed on the anchor rod body; the grouting holes between the limiting ring and the threaded section are divided into two opposite rows.

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