An anchoring device

Abstract

The present invention discloses an anchoring device for anchoring rock layers between a leading tunnel and a trailing tunnel, comprising an anchor rod, an anchor cable and a detachable casing. Compared with the prior art, the anchoring device of the present invention has an innovative design for the structure of the anchor rod, and adds an anchor cable that can slide and retract inside the anchor rod, thereby realizing control of the anchor cable position during the construction of the trailing tunnel, and at the same time protecting the anchor cable by providing a detachable casing. The anchoring device has a simple structure and low cost, and can effectively protect anchoring bodies such as anchor cables and anchor rods, thereby facilitating the subsequent effective tensioning of the anchor rods and anchor cables, thereby ensuring the stability of the rock sandwiched during the excavation of a small-clearance tunnel, protecting the stability of the tunnel support structure and improving reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction auxiliary equipment, and in particular to an anchoring device. Background Art

[0002] Highway construction in mountainous areas with complex terrain and geology often involves numerous tunnel projects. Due to topographical constraints, overall route alignment requirements, or special bridge-tunnel connections, the spacing between the twin tunnels in these tunnel projects often fails to meet regulatory requirements, necessitating the use of specialized tunnel structures such as close-to-close tunnels. Close-to-close tunnels differ from separated tunnels in that the distance between the twin tunnels is smaller, and excavation between the leading and trailing tunnels can affect each other. The interbedded rock (the rock layer between the leading and trailing tunnels) is severely disturbed by excavation on both sides, placing it in an unfavorable state of unidirectional or bidirectional stress, severely impacting construction safety.

[0003] In order to improve the stability and compressive strength of the middle rock, one of the commonly used methods is to use prestressed tension anchor rods to reinforce the middle rock laterally. The prestressed tension anchor rods directly penetrate the middle rock column and apply strong preload at both ends. The preload is transmitted by virtue of its shear strength with the rock mass, so that the middle rock column is in a favorable state of three-way stress, thereby improving the mechanical properties of the middle rock column. In the construction process of traditional prestressed tension anchor rods, after the mortar strength in the anchor hole reaches the design value, the anchor rod is initially tensioned. After the subsequent tunnel is excavated to expose the nut at the end of the anchor rod, the anchor rod on the side of the subsequent tunnel is prestressed to the design value, and finally the anchor rod of the first tunnel is tensioned to the design value. The structure of the anchor rod inserted into the anchor hole on the side of the first tunnel is as follows: Figure 1 However, during the construction of the back tunnel, it is often difficult to avoid exposing the opposite side anchor bolt end (i.e. Figure 1 The left end of the middle anchor rod is damaged, so that the anchor rod cannot be effectively tensioned, thereby increasing the risk of damage or deformation of the middle rock. Summary of the Invention

[0004] In view of this, the present invention proposes an anchoring device, which can solve the problem that the existing anchoring device is easily damaged during the construction process of the back tunnel.

[0005] The technical solution of the present invention is achieved as follows:

[0006] An anchoring device for anchoring a rock formation between a leading hole and a trailing hole, comprising:

[0007] An anchor rod, wherein the two ends of the anchor rod are respectively defined as a first end and a second end, the first end is provided with a hollow channel opened along the axial direction of the anchor rod, the outside of the anchor rod is provided with an external thread, the second end is sleeved with a gasket and threadedly connected with an anchor nut; the anchor rod is also provided with a grouting ring; the first end is provided with a tightening opening, the aperture of the tightening opening is smaller than the aperture of the hollow channel; the gasket is provided with a grouting pipe and an exhaust pipe;

[0008] An anchor cable, the anchor cable being slidably inserted into the constriction opening at the first end, the anchor cable being fixedly provided with a first wedge-shaped clip on the portion thereof located within the hollow channel, the maximum width of the cross section of the first wedge-shaped clip being larger than the aperture of the constriction opening but smaller than the aperture of the hollow channel, the end of the anchor cable located outside the hollow channel being defined as a free end, an isolation sleeve being sleeved on the portion of the anchor cable located outside the hollow channel, and the free end being passed through one end of the isolation sleeve;

[0009] A detachable sleeve is sleeved on the anchor cable, one end of the detachable sleeve forms a detachable temporary connection with the anchor rod, and the other end is closed.

[0010] As a further optional solution of the anchoring device, it also includes a partition member, which is arranged in the detachable sleeve and located between the closed end of the detachable sleeve and the anchor cable, so as to prevent the free end of the anchor cable from entering the loose circle of the rear hole.

[0011] As a further optional option for the anchoring device, the detachable sleeve adopts a PVC tube, and both ends of the detachable sleeve are divided into multiple connecting strips along the axial direction, wherein the multiple connecting strips at one end are overlapped with the outside of the anchor rod and are fixed by binding or tape; the multiple connecting strips at the other end are gathered into a cone shape and bundled and fixed to form a conical structure.

[0012] As a further optional solution of the anchoring device, the partitioning member is formed by bundling a plurality of PVC tubes with a diameter smaller than that of the anchor cable.

[0013] As a further optional solution for the anchoring device, the first end of the anchor rod is provided with a plurality of claw strips arranged along the circumferential direction, the claw strips are bent and tilted toward the axis of the anchor rod, stirrups are fixed on the outside of the plurality of claw strips, and the tightening opening is formed between the plurality of claw strips.

[0014] As a further optional solution for the anchoring device, the hollow channel in the anchor rod penetrates axially, and the anchor rod is provided with a first limiting nail, which is inserted into the hollow channel to prevent the anchor cable from detaching from the second end of the anchor rod.

[0015] As a further optional solution of the anchoring device, one end of the isolation sleeve close to the anchor rod is fixed to the anchor cable by tape to achieve sealing.

[0016] As a further optional solution of the anchoring device, at least one second wedge-shaped clip is provided on the anchor cable, and the second wedge-shaped clip is located between the tightening opening and the isolation sleeve.

[0017] As a further optional solution of the anchoring device, the detachable sleeve is provided with a second limiting nail, and the second limiting nail is inserted into the detachable sleeve to prevent the anchor rod and the detachable sleeve from approaching each other.

[0018] As a further optional solution of the anchoring device, a first centering bracket is provided outside the anchor rod, and a second centering bracket is provided outside the detachable sleeve.

[0019] Compared with the prior art, the anchoring device of the present invention has an innovative design for the structure of the anchor rod, and adds an anchor cable that can slide and retract inside the anchor rod, so as to realize the control of the anchor cable position during the post-tunnel construction process, and at the same time, the anchor cable is protected by providing a detachable casing; the anchoring device has a simple structure and low cost, and can achieve effective protection of anchoring bodies such as anchor cables and anchor rods, so as to facilitate the subsequent effective tensioning of anchor rods and anchor cables, thereby ensuring the stability of the rock during the excavation of small-clearance tunnels, protecting the stability of the tunnel support structure and improving reliability.

[0020] In addition, the beneficial effects of other optional solutions in this application are further described / embodied in the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of anchoring construction between two tunnels with a small clearance using tension anchor rods in the prior art;

[0023] Figure 2 It is a structural schematic diagram of an anchoring device of the present invention;

[0024] Figure 3 is a structural schematic diagram of the anchor rod;

[0025] Figure 4 is a structural schematic diagram of the anchor cable;

[0026] Figure 5 is a schematic diagram of the connection between the anchor cable and the anchor rod;

[0027] Figure 6 is a structural schematic diagram of the detachable sleeve;

[0028] Figure 7 A schematic diagram of the structure of the connecting strips separated from the detachable sleeve;

[0029] Figure 8 is a structural schematic diagram of the partition member;

[0030] Figure 9 This is a schematic diagram of the anchoring device of the present invention when inserted into the anchor hole of the rock formation;

[0031] Figure 10 This is a schematic diagram of grouting into the anchor hole and initially tensioning the anchor rod in the pilot hole when the anchoring device of the present invention is used;

[0032] Figure 11 This is a schematic diagram of grouting into the anchor hole in the back hole when the anchoring device of the present invention is used;

[0033] Figure 12 This is a schematic diagram of tensioning an anchor cable when the anchoring device of the present invention is used;

[0034] Figure 13 This is a schematic diagram of tightening the anchor cable with a clamp when the anchoring device of the present invention is used.

[0035] In the figure: 100, anchor hole; 200, jack; 300, clamp;

[0036] 1. Anchor rod; 1a. First end; 1b. Second end; 11. Hollow channel; 12. Gasket; 121. Grouting pipe; 122. Exhaust pipe; 13. Anchor nut; 14. Grouting ring; 15. Tightening opening; 16. Claw strip; 17. Stirrup; 18. First stop pin; 19. First centering bracket;

[0037] 2. Anchor cable; 2a. Free end; 21. First wedge-shaped clip; 22. Isolation sleeve; 221. Connecting rope; 23. Second wedge-shaped clip; 24. Metal joint;

[0038] 3. Detachable sleeve; 3a. Connecting strip; 31. Conical structure; 32. Second limiting pin; 33. Second centering bracket;

[0039] 4. Separating components;

[0040] 5. Tape. DETAILED DESCRIPTION

[0041] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] refer to Figure 2-13 , shows an anchoring device for anchoring the rock formation between the leading hole and the trailing hole, comprising an anchor rod 1, an anchor cable 2 and a detachable casing 3;

[0046] For ease of description, the two ends of the anchor rod 1 are defined as a first end 1a and a second end 1b, respectively. A hollow channel 11 is provided on the first end 1a and is opened along the axial direction of the anchor rod 1. The anchor rod 1 is provided with an external thread on the outside. A gasket 12 is sleeved on the second end 1b and is threadedly connected with an anchor nut 13. The gasket 12 is provided with a grouting pipe 121 and an exhaust pipe 122 to facilitate grouting operations. A grouting ring 14 is also provided on the anchor rod 1. A tightening opening 15 is provided on the first end 1a, and the aperture of the tightening opening 15 is smaller than the aperture of the hollow channel 11.

[0047] The anchor cable 2 is slidably inserted into the constriction opening 15 at the first end 1a. A first wedge-shaped clamping piece 21 is fixedly provided on the portion of the anchor cable 2 located in the hollow passage 11. The maximum width of the cross section of the first wedge-shaped clamping piece 21 is larger than the aperture of the constriction opening 15 but smaller than the aperture of the hollow passage 11. That is, the first wedge-shaped clamping piece can slide in the hollow passage 11 but cannot pass through the constriction opening 15. The structural coordination between the anchor cable 2 and the anchor rod 1 enables the anchor rod 1 to be partially hidden in the hollow passage 11 of the anchor rod 1 in advance, and the anchor cable 2 can be pulled out later.

[0048] For the convenience of description, the end of the anchor cable 2 located outside the hollow channel 11 is defined as the free end 2a, and the part of the anchor cable 2 located outside the hollow channel 11 is sleeved with an isolation sleeve 22, and the free end 2a passes through one end of the isolation sleeve 22; the isolation sleeve 22 can ensure that the anchor cable 2 has a free section that is not bonded to the slurry, and the free section is used to subsequently form prestressed tensioning of the anchor cable 2; the detachable sleeve 3 is sleeved on the anchor cable 2, and one end of the detachable sleeve 3 forms a detachable temporary connection with the anchor rod 1, which is convenient for subsequently withdrawing the detachable sleeve 3, and the other end of the detachable sleeve 3 is closed to prevent the free end 2a of the anchor cable 2 from passing through the detachable sleeve 3.

[0049] When applying:

[0050] refer to Figure 9, the advance tunnel has been excavated, and an anchor hole 100 is opened on the side wall of the advance tunnel, and the anchoring device of the present invention is inserted into the anchor hole 100, at which time part of the anchor cable 2 is hidden in the hollow channel 11 of the anchor rod 1; generally, the thickness of the interbedded rock in a small clear distance is generally 6-16m, and the length of the anchor cable 2 plus the anchor rod 1 is slightly larger than the thickness of the interbedded rock, and the size of the tunnel loosening circle is generally 0-1.5m. If the anchor cable length is 3-8m, the length of the anchor cable hidden in the anchor rod can be 0-1.5m; specifically, the rock in the loosening circle is relatively broken, and the rock on the side wall of the anchor hole 100 located in the loosening circle is unstable, and even stones may fall and hit the anchor cable 2 on the side of the subsequent tunnel. By hiding part of the anchor cable 2 in the hollow channel 11 of the anchor rod 1, the free end of the anchor cable 2 can be located outside the loosening circle range on the side of the subsequent tunnel, thereby reducing the risk of damage to the anchor cable 2;

[0051] refer to Figure 10 , before grouting, water is injected into the anchor hole 100, and grouting begins after the grouting ring 14 expands. Specifically, grout (usually cement mortar) is injected into the anchor hole 100 through the grouting pipe 121 on the gasket 12. The grouting ring 14 allows the grout to remain in a portion of the anchor hole 100. After the grout reaches the designed strength, the anchor nut 13 is rotated to perform initial tensioning on the anchor rod 1;

[0052] refer to Figure 11 , then the back hole is excavated. The excavation of the back hole is generally carried out by mechanical excavation or blasting. During the excavation process of the back hole, even if the detachable casing 3 is damaged, it will not affect the subsequent anchoring construction. The detachable casing 3 is a disposable component. When the excavation of the back hole is completed, the detachable casing 3 is pulled outwards. During the pulling, the temporary connection between the detachable casing 3 and the anchor rod 1 is disconnected, so that the detachable casing 3 is pulled out; then the free end 2a of the anchor cable 2 is pulled outwards, and the anchor cable 2 in the anchor rod 1 is pulled out until the first wedge-shaped clip 21 on the anchor cable 2 is clamped in the tightening opening 15 of the first end 1a of the anchor rod 1; then grouting can be carried out from the back hole side into the anchor hole 100;

[0053] refer to Figure 12 After the slurry reaches the designed strength, the anchor cable 2 is prestressed to the designed value through the jack 200;

[0054] refer to Figure 13 , remove the jack 200, retract the anchor cable 2, tighten the anchor cable 2 using the clamp 300, and then pull the anchor rod 1 on the side of the pilot hole to the design value to complete the construction.

[0055] Specifically, the detachable casing 3 is made of PVC pipe, which is easy to obtain and low in cost, and will not cause damage to the mechanical equipment after excavation. Figure 6 and Figure 7 Both ends of the detachable sleeve 3 are divided into multiple connecting strips 3a along the axial direction, and the multiple connecting strips 3a at one end are overlapped with the outside of the anchor rod 1 and fixed by binding or tape, thereby forming a temporary connection between the detachable sleeve 3 and the anchor rod 1. When the detachable sleeve 3 is pulled, the detachable sleeve 3 can be pulled out from the rear hole side; the multiple connecting strips 3a at the other end of the detachable sleeve 3 are gathered into a cone shape and tied and fixed to form a cone-shaped structure part 31; when the anchoring device is inserted into the anchor hole 100, there is gravel in the anchor hole 100, and the cone-shaped structure part 31 can reduce the insertion resistance of the detachable sleeve 3, thereby facilitating the insertion of the anchoring device into the anchor hole 100 to the bottom.

[0056] The above solution is preferred. In order to facilitate pulling out the anchor cable from the rear tunnel side, refer to Figure 4 A metal joint 24 is welded on the free end 2a of the anchor cable 2, and a hole is opened on the metal joint 24 for the connection rope 221 to pass through. The connection rope 221 is made of steel wire rope, and the connection rope 221 is wound into a ring. A hook-shaped tool can be inserted into the anchor hole 100 to hook the connection rope 221, thereby pulling the free end 2a of the anchor cable 2 out to the rear tunnel side.

[0057] In some embodiments, in order to ensure that the free end 2a of the anchor cable 2 does not enter the loose circle of the back hole, Figure 2 and Figure 9 The anchoring device further includes a separating member 4, which is disposed in the detachable sleeve 3 and is located between the closed end of the detachable sleeve 3 and the anchor cable 2; in this way, the separating member 4 creates a certain distance between the closed end of the detachable sleeve 3 and the free end 2a of the anchor cable 2; in this embodiment, the separating member 4 is utilized to ensure that the anchor cable 2 is located outside the loosening circle on the rear tunnel side, which can further ensure the integrity and safety of the anchor cable 2.

[0058] For details of the above scheme, please refer to Figure 8 The partition member 4 is formed by bundling multiple PVC tubes, and the diameter of these PVC tubes is smaller than the diameter of the anchor cable 2, ensuring that the free end of the anchor cable 2 can be effectively blocked; in this way, the manufacturing material of the partition member 4 is easy to obtain and low in cost, and will not cause damage to the mechanical equipment for excavating the back tunnel; during the excavation of the back tunnel, the detachable casing 3 and the partition member 4 are both disposable components, even if the detachable casing 3 and the partition member 4 are damaged, it will not affect the subsequent anchoring construction; after the detachable casing 3 and the partition member 4 are disassembled, the anchor cable 2 is tensioned.

[0059] In some embodiments, to facilitate the formation of the tightening opening 15, refer to Figure 5 , the first end 1a of the anchor rod 1 is provided with a plurality of claw strips 16 arranged in a circumferential direction, and the claw strips 16 can be formed by cutting the first end 1a, and the claw strips 16 are bent and tilted toward the axis of the anchor rod 1, so that the tightening opening 15 is formed between the plurality of claw strips 16, and stirrups 17 are fixed to the outside of the plurality of claw strips 16, and the stirrups are welded to the claw strips 16. The structural stability of the claw strips 16 is strengthened by the tightening, ensuring that when the anchor cable 2 is pulled, the claw strips 16 will not open, and the first wedge-shaped clip 21 will not detach from the tightening opening 15; In addition, in this embodiment, on the one hand, there are gaps between the claw strips 16, combined with Figure 11 When grouting is injected into the anchor hole 100 on the rear tunnel side, the grout will fill the gap between the claw strip 16 and the first wedge-shaped clip 21, further ensuring that the claw strip 16 will not open, and ensuring that an effective connection is formed between the tightening opening 15 and the first wedge-shaped clip 21; on the other hand, the anchor cable 2 is tensioned after grouting, and the magnitude of the axial force gradually decays into the anchor hole 100. Therefore, at the connection position between the anchor cable 2 and the anchor rod 1, the axial force is smaller than the prestress applied by the anchor cable 2 outside the rear tunnel, and the first wedge-shaped clip 21 maintains a stable connection with the tightening opening 15 of the anchor rod 1.

[0060] Specifically, the hollow channel 11 in the anchor rod 1 is axially penetrated, and the anchor rod 1 is provided with a first limiting nail 18. The first limiting nail 18 is inserted into the hollow channel 11 to prevent the anchor cable 2 from detaching from the second end 1b of the anchor rod 1. During manufacturing, the first end 1a is first cut to form the claw strip 16, and then the first wedge-shaped clip 21 on the anchor cable 2 is inserted from the first end 1a of the anchor rod 1. The first limiting nail 18 blocks the anchor cable 2 to prevent the anchor cable 2 from detaching from the second end 1b of the anchor rod 1; then, the claw strip 16 is bent and fixed with stirrups 17 to form the tightening opening 15, so that the first wedge-shaped clip 21 cannot detach from the hollow channel 11.

[0061] Specifically, the isolation sleeve 22 is fixed to the anchor cable 2 at one end close to the anchor rod 1 by means of tape 5 and sealed, thereby preventing the slurry from entering from the gap between the isolation sleeve 22 and the anchor cable 2, thereby preventing the free section of the anchor cable 2 from being bonded by the slurry; conventionally speaking, the portion of the anchor cable 2 bonded to the slurry in the anchor hole 100 is called the anchoring section, and the portion not bonded to the slurry is called the free section, and by tensioning the free section, the deformation of the free section forms prestress.

[0062] For details of the above scheme, please refer to Figure 4 At least one second wedge-shaped clip 23 is provided on the anchor cable 2, and the second wedge-shaped clip 23 is located between the tightening opening 15 and the isolation sleeve 22; wherein, the second wedge-shaped clip 23 can be used as an anchor point to increase the anchoring force between the anchor cable 2 and the slurry.

[0063] For details of the above scheme, please refer to Figure 6 and Figure 9 The detachable sleeve 3 is provided with a second stopper 32, which is inserted into the detachable sleeve 3 to prevent the anchor rod 1 and the detachable sleeve 3 from approaching each other. Thus, when the anchoring device is inserted into the anchor hole 100, the second stopper 32 blocks the first end 1a of the anchor rod 1. Even if the detachable sleeve 3 encounters resistance during insertion, the anchor rod 1 will not penetrate further into the detachable sleeve 3.

[0064] Specifically, in order to make the anchoring device as close as possible to the center of the anchor hole 100, refer to Figure 3 、 Figure 6 and Figure 9 The anchor rod 1 is provided with a first centering bracket 19, and the detachable sleeve 3 is provided with a second centering bracket 33. In this way, the inner wall of the anchor hole 100 is supported by the first centering bracket 19 and the second centering bracket 33, so that the anchoring device is stably centered.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anchoring device for anchoring the rock layer between the first tunnel and the subsequent tunnel, characterized in that: include: An anchor rod, wherein the two ends of the anchor rod are respectively defined as a first end and a second end, the first end is provided with a hollow channel opened along the axial direction of the anchor rod, the outside of the anchor rod is provided with an external thread, the second end is sleeved with a gasket and threadedly connected with an anchor nut, the gasket is provided with a grouting pipe and an exhaust pipe; the anchor rod is also provided with a grouting ring; the first end is provided with a tightening opening, the aperture of the tightening opening is smaller than the aperture of the hollow channel; An anchor cable, the anchor cable being slidably inserted into the constriction opening at the first end, the anchor cable being fixedly provided with a first wedge-shaped clip on the portion thereof located within the hollow channel, the maximum width of the cross section of the first wedge-shaped clip being larger than the aperture of the constriction opening but smaller than the aperture of the hollow channel, the end of the anchor cable located outside the hollow channel being defined as a free end, an isolation sleeve being sleeved on the portion of the anchor cable located outside the hollow channel, and the free end being passed through one end of the isolation sleeve; a detachable sleeve, the detachable sleeve being sleeved on the anchor cable, one end of the detachable sleeve forming a detachable temporary connection with the anchor rod, and the other end being closed; The device further comprises a separation member, the separation member being arranged in the detachable sleeve and being located between the closed end of the detachable sleeve and the anchor cable, so as to prevent the free end of the anchor cable from entering the loosening circle of the rear hole; Among them, after the excavation of the leading hole is completed, an anchor hole is opened on the side wall of the leading hole, and the anchoring device is inserted into the anchor hole. At this time, part of the anchor cable is hidden in the hollow channel of the anchor rod; when the excavation of the subsequent hole is completed, the detachable sleeve is pulled outward, and the temporary connection between the detachable sleeve and the anchor rod is disconnected during the pulling, so that the detachable sleeve is pulled out; then the free end of the anchor cable is pulled outward, and the anchor cable in the anchor rod is pulled out until the first wedge-shaped clip on the anchor cable is clamped in the tightening opening of the first end of the anchor rod; then grouting can be carried out from the side of the subsequent hole into the anchor hole.

2. The anchoring device according to claim 1, characterized in that The detachable sleeve adopts a PVC tube, and both ends of the detachable sleeve are divided into multiple connecting strips along the axial direction, wherein the multiple connecting strips at one end are overlapped with the outside of the anchor rod and fixed by binding or tape; the multiple connecting strips at the other end are gathered into a cone shape and bundled and fixed to form a conical structure.

3. The anchoring device according to claim 2, characterized in that: The partitioning member is formed by bundling a plurality of PVC pipes whose diameters are smaller than the diameters of the anchor cables.

4. The anchoring device according to any one of claims 1 to 3, characterized in that: The first end of the anchor rod is provided with a plurality of claw strips arranged along the circumferential direction, the claw strips are bent and inclined toward the axis of the anchor rod, stirrups are fixed on the outside of the plurality of claw strips, and the tightening opening is formed between the plurality of claw strips.

5. The anchoring device according to claim 4, characterized in that: The hollow channel in the anchor rod penetrates axially, and the anchor rod is provided with a first limiting nail, which is inserted into the hollow channel to prevent the anchor cable from detaching from the second end of the anchor rod.

6. The anchoring device according to any one of claims 1 to 3, characterized in that: One end of the isolation sleeve close to the anchor rod is fixed to the anchor cable by adhesive tape to achieve sealing.

7. The anchoring device according to claim 1, characterized in that: At least one second wedge-shaped clip is provided on the anchor cable, and the second wedge-shaped clip is located between the tightening opening and the isolation sleeve.

8. The anchoring device according to claim 2, characterized in that: The detachable sleeve is provided with a second limiting nail, and the second limiting nail is inserted into the detachable sleeve to prevent the anchor rod and the detachable sleeve from approaching each other.

9. The anchoring device according to claim 1, characterized in that: A first centering bracket is provided outside the anchor rod, and a second centering bracket is provided outside the detachable sleeve.

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