Anchor line recoverable anchor and method of using same

Abstract

This invention discloses a retrievable anchor and its method of use. The retrievable anchor includes a shell, a push-pull component, and an umbrella-shaped component. The shell includes a hollow outer shell and an anchor head disposed at one end of the hollow outer shell. A first tube and a second tube are coaxially and fixedly connected inside the hollow outer shell. The second tube is located between the anchor head and the first tube. The diameter of the second tube near the first tube is larger than the diameter of the first tube. Several sliding rods are provided through the sides of the second tube and the hollow outer shell. In this invention, after the anchor is threadedly connected to the push-pull rod, the retrievable anchor can be inserted into the pre-drilled anchor installation hole by pushing the anchor. Then, by rotating the anchor, the anchor can be fixed in the anchor installation hole for easy tensioning. Then, by rotating the anchor in the opposite direction, the threaded connection between the anchor and the push-pull rod can be released, thereby facilitating the pulling out of the anchor and thus facilitating anchor retrieval.

Description

Technical Field

[0001] This invention belongs to the field of anchorage technology, and particularly relates to recyclable anchorages and their usage methods. Background Technology

[0002] Cable anchoring systems, as a widely used method for underground foundation pit support, have been widely adopted due to their adaptability and cost-effectiveness. However, while being widely adopted, existing cable anchoring systems face the following problems:

[0003] Most anchor cables are difficult to recycle after their function ends. These anchor cables are often buried haphazardly underground and cannot be decomposed or recycled, which causes persistent pollution to the environment and soil.

[0004] In addition, anchor cables are usually made of metal materials such as steel. Because the materials themselves are susceptible to chemical and electrochemical corrosion, the performance and strength of anchor cables will gradually decrease after being exposed to factors such as water and salt in the soil, which will eventually affect the safety of the overall support structure. Moreover, such corrosion will not only reduce the service life of anchor cables, but also increase the maintenance cost of the project. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this invention provides a recyclable anchor and its usage method, which facilitates anchor cable recycling.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] In a first aspect, a retrievable anchorage is provided, comprising:

[0008] The shell includes a hollow outer shell and an anchor head disposed at one end of the hollow outer shell. A first tube and a second tube are coaxially and fixedly connected inside the hollow outer shell. The second tube is located between the anchor head and the first tube. The diameter of the second tube at the end closer to the first tube is larger than the diameter of the first tube. Several sliding rods are provided through the second tube and the side of the hollow outer shell.

[0009] The push-pull component includes a third tube body coaxially fixedly connected to the second tube body. An internally threaded tube is coaxially fixedly connected to one end of the third tube body near the first tube body. A push-pull rod is internally threaded to the internally threaded tube. The two ends of the push-pull rod extend outward from the two ends of the internally threaded tube, respectively. One end of the push-pull rod is slidably connected to the third tube body, and the other end of the push-pull rod is threadedly connected to an anchor cable. The inner diameter of the third tube body is larger than the inner diameter of the internally threaded tube.

[0010] The umbrella-shaped component includes several limiting plates and several push-pull connecting rods. An annular groove is provided on the outer side of the third tube. One end of each of the limiting plates is hinged in the annular groove. One end of the push-pull connecting rod is hinged to the end of the push-pull rod near the anchor cable, and the other end of the push-pull connecting rod is hinged to the inner side of the limiting plate.

[0011] When the end of the push-pull linkage closes to the internally threaded pipe, the ends of several push-pull linkages away from the push-pull rod push several limiting plates to expand outward around the annular groove, so that the limiting plates contact the inner wall of the second pipe body and push several sliding rods outward.

[0012] In one embodiment, a tapered hole is provided inside the second tube. The diameter of the tapered hole at the end away from the first tube is smaller than the diameter at the end of the tapered hole closer to the first tube. The generatrix length of the tapered hole matches the length of the limiting piece.

[0013] The beneficial effects of adopting the above technical solution are as follows: the limiting piece will tilt outward during the outward expansion process, and a conical hole is provided in the second tube. The diameter of the end of the conical hole away from the first tube is smaller than the diameter of the end of the conical hole close to the first tube. The generatrix length of the conical hole matches the length of the limiting piece, so that the limiting piece can contact the inner wall of the second tube with a larger contact area, thereby improving the fixing stability and allowing the sliding rod to extend outward more.

[0014] In one embodiment, the diameter of the first tube is larger than the diameter of the anchor cable.

[0015] The beneficial effects of adopting the above technical solution are: the diameter of the first tube is larger than the diameter of the anchor cable, so that the anchor cable can pass through the first tube and connect with the push-pull rod.

[0016] In one embodiment, a plurality of sliding rods are uniformly arranged on the second tube and the hollow outer shell along the circumferential and axial directions.

[0017] The beneficial effects of adopting the above technical solution are as follows: Several sliding rods are evenly arranged on the second tube and the hollow shell along the circumferential and axial directions, which is conducive to the uniform circumferential force of the anchor with retrievable anchor cable, and can provide force at different positions in the axial direction, so as to make the installation of the anchor with retrievable anchor cable more stable.

[0018] In one embodiment, the distance between the end of the sliding rod near the anchor head and the axis of the second tube is less than the distance between the end of the sliding rod away from the anchor head and the axis of the second tube.

[0019] The beneficial effects of adopting the above technical solution are as follows: the distance between the end of the sliding rod near the anchor head and the axis of the second tube is less than the distance between the end of the sliding rod away from the anchor head and the axis of the second tube. That is, from the perspective of the direction of the anchor cable push, the sliding rod is inclined towards the axis of the second tube. In other words, when the anchor cable is pulled after one end of the sliding rod slides into the anchor cable installation hole, the sliding rod can provide a larger directional force to avoid the anchor cable being pulled arbitrarily.

[0020] In one embodiment, one end of the push-pull rod is provided with a sliding part for sliding connection with the third tube body, and the diameter of the sliding part matches the inner diameter of the third tube body.

[0021] The beneficial effects of adopting the above technical solution are as follows: the push-pull rod can slide in the third tube body by relying on the sliding part, and the diameter of the sliding part is larger than the inner diameter of the internal thread tube, so the sliding part cannot slide into the internal thread tube, which is conducive to axially limiting the sliding part.

[0022] In one embodiment, when the end of the third tube away from the internally threaded tube contacts the sliding part, the limiting piece contacts the inner wall of the second tube.

[0023] The beneficial effects of adopting the above technical solution are as follows: when the end of the third tube away from the internally threaded tube contacts the sliding part, the limiting piece contacts the inner wall of the second tube, thereby avoiding damage to components such as the push-pull linkage due to excessive movement of the push-pull rod.

[0024] In one embodiment, the thread direction of the internal thread on the internally threaded pipe is the same as the thread direction of the internal thread on the push-pull rod.

[0025] The beneficial effects of adopting the above technical solution are as follows: the thread direction of the internal thread on the internal threaded pipe is the same as the thread direction of the internal thread on the push-pull rod, so that after the push-pull rod rotates in one direction and is restricted by the axial direction of the internal threaded pipe, the anchor cable can rotate in the same direction to disengage from the push-pull rod, so as to facilitate the recovery of the anchor cable.

[0026] In one embodiment, one end of several limiting plates is provided with an annular connecting block for sliding and hinged connection with the annular groove, the push-pull rod is provided with several first circular grooves for hinged connection with the push-pull connecting rod, and the limiting plates are provided with second circular grooves for hinged connection with the push-pull connecting rod.

[0027] The beneficial effects of adopting the above technical solution are as follows: one end of several limiting pieces can be slidably connected and hinged to the annular groove through the annular connecting block; and the push-pull rod can be hinged to the push-pull connecting rod through the first circular groove, and the limiting piece can be hinged to the push-pull connecting rod through the second circular groove.

[0028] Secondly, a method for using a recyclable anchor is provided, comprising the following steps:

[0029] Connect the anchor cable threadedly to the push-pull rod;

[0030] Push the anchor cable until the retrievable anchor is inserted into the pre-drilled anchor installation hole;

[0031] Rotate the anchor cable in one direction to make the push-pull rod gradually move away from the first tube, thereby driving the push-pull connecting rod to push several limiting pieces to expand outward around the annular groove, so that several limiting pieces contact the inner wall of the second tube and push one end of several sliding rods into the anchor cable installation hole to fix the anchor cable in the anchor cable installation hole.

[0032] Rotate the anchor cable in the opposite direction to make the push-pull rod gradually approach the first tube body, thereby driving the push-pull connecting rod to pull several limiting plates inward around the annular groove, thereby making several limiting plates move away from the inner wall of the second tube body, until the push-pull rod can no longer approach the first tube body;

[0033] Continue rotating the anchor cable in the opposite direction to disengage it from the threaded connection with the push-pull rod, then pull out the anchor cable to retrieve it.

[0034] The beneficial effects of this invention are as follows:

[0035] After the anchor cable is threadedly connected to the push-pull rod, the retrievable anchor can be inserted into the pre-drilled anchor installation hole by pushing the anchor cable; then, by rotating the anchor cable, the anchor cable can be fixed in the anchor installation hole for easy tensioning; then, by rotating the anchor cable in the opposite direction, the threaded connection between the anchor cable and the push-pull rod can be released, thus facilitating the pulling out of the anchor cable and its retrieval. Attached Figure Description

[0036] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0037] Figure 1 A schematic diagram of the structure of the present invention is shown;

[0038] Figure 2 Another structural schematic diagram of the present invention is shown;

[0039] Figure 3 A schematic diagram of the shell structure in this invention is shown;

[0040] Figure 4 The diagram shows the structural schematics of the push-pull member and the umbrella-shaped member in this invention;

[0041] Figure 5 This shows a structural schematic diagram of the umbrella-shaped component in this invention;

[0042] Figure 6 A schematic diagram of the push-pull component in this invention is shown;

[0043] Figure 7This shows a schematic diagram of the push-pull rod structure in this invention;

[0044] Figure 8 A schematic diagram illustrating the usage process of this invention is shown;

[0045] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0046] Figure label:

[0047] 1-Hollow outer shell, 2-First tube body, 3-Second tube body, 4-Sliding rod, 5-Push-pull connecting rod, 6-Limiting plate, 7-Anchor head, 8-Third tube body, 9-Push-pull rod, 901-Sliding part, 10-Internal threaded tube, 11-Anchor cable, 12-Second circular groove, 13-Annular connecting block, 14-Annular groove, 15-First circular groove. Detailed Implementation

[0048] The invention will now be further described with reference to the accompanying drawings.

[0049] This invention provides an anchor with recyclable anchor cable, such as... Figure 1-7 As shown, it includes:

[0050] The shell includes a hollow outer shell 1 and an anchor head 7 disposed at one end of the hollow outer shell 1. A first tube 2 and a second tube 3 are coaxially and fixedly connected inside the hollow outer shell 1. The second tube 3 is located between the anchor head 7 and the first tube 2. The diameter of the end of the second tube 3 closer to the first tube 2 is larger than the diameter of the first tube 2. Several sliding rods 4 are provided through the second tube 3 and the side of the hollow outer shell 1.

[0051] The push-pull component includes a third tube 8 coaxially fixedly connected inside the second tube 3. One end of the third tube 8 near the first tube 2 is coaxially fixedly connected to an internally threaded tube 10. The internally threaded tube 10 is internally threadedly connected to a push-pull rod 9. Both ends of the push-pull rod 9 extend outward from both ends of the internally threaded tube 10. One end of the push-pull rod 9 is slidably connected inside the third tube 8. The other end of the push-pull rod 9 is threadedly connected to an anchor cable 11. The inner diameter of the third tube 8 is larger than the inner diameter of the internally threaded tube 10.

[0052] The umbrella-shaped component includes several limiting pieces 6 and several push-pull connecting rods 5. An annular groove 14 is provided on the outer side of the third tube body 8. One end of each of the limiting pieces 6 is hinged in the annular groove 14. One end of the push-pull connecting rod 5 is hinged to the end of the push-pull rod 9 near the anchor cable 11, and the other end of the push-pull connecting rod 5 is hinged to the inner side of the limiting piece 6.

[0053] When the end of the push-pull link 5 close to the push-pull rod 9 approaches the internal threaded tube 10, the ends of the push-pull link 5 away from the push-pull rod 9 respectively push the limiting pieces 6 to expand outward around the annular groove 14, so that the limiting pieces 6 contact the inner wall of the second tube body 3 and push the sliding rods 4 outward.

[0054] Understandably, after the anchor cable 11 is threadedly connected to the push-pull rod 9, pushing the anchor cable 11 allows the retrievable anchor to be inserted into the pre-drilled anchor installation hole; then rotating the anchor cable 11 fixes it in the installation hole for easy tensioning; then rotating the anchor cable 11 in the opposite direction releases the threaded connection between the anchor cable 11 and the push-pull rod 9, making it easier to pull out the anchor cable 11 and thus facilitate its retrieval.

[0055] It should be noted that this invention employs an umbrella-like design, which allows the anchor cable 11 to be recycled and reused after tensioning, significantly reducing the negative impact of the anchor cable 11 on the soil environment. This not only reduces land pollution caused by long-term burial but also avoids the environmental risks of corrosion and decomposition of scrap metal materials in the soil. This invention achieves the installation and recycling of the anchor cable 11 by applying torque externally, featuring a quick-assembly and disassembly structure for convenient and rapid recycling of the anchor cable 11 after construction. This reduces the need for new anchor rods and new anchor cables 11, lowering the overall project capital expenditure and improving economic efficiency in the long run. This invention also employs a multi-layered structure. To ensure the safety and convenience of anchor cable 11 construction and retrieval, the tight connection between the outer and inner layers during the installation and use of anchor cable 11 ensures the stability of the structure. At the same time, during retrieval, the separation of the inner and outer structures simplifies the operation process and reduces safety risks. In this invention, reinforcement can be achieved not only through anchor head 7, but also through sliding rod 4 that can slide into the anchor cable installation hole. Specifically, during construction, the umbrella-shaped component can slowly open as needed under the action of external torque, so that the sliding rod 4 can be slowly pushed into the area around the anchor cable installation hole, thereby achieving gradual and controllable reinforcement of the soil layer, increasing the convenience of construction and the stability of the project.

[0056] It should also be noted that the shell can protect other internal components and provide installation space for them. The hollow shell 1 and the anchor head 7 are the outermost layers, which facilitate drilling and protect the internal structure. In addition, after several limiting plates 6 contact the inner wall of the second tube 3, the first tube 2 and the second tube 3 can use their inner diameter difference to axially limit the limiting plates 6 to prevent the internal components from moving and causing structural damage.

[0057] In one embodiment, a tapered hole is provided inside the second tube 3. The diameter of the tapered hole at the end away from the first tube 2 is smaller than the diameter at the end of the tapered hole closer to the first tube 2. The generatrix length of the tapered hole matches the length of the limiting piece 6.

[0058] It is understandable that the limiting piece 6 will tilt outward during the outward expansion process. A conical hole is provided inside the second tube 3, and the diameter of the end of the conical hole away from the first tube 2 is smaller than the diameter of the end of the conical hole close to the first tube 2. The generatrix length of the conical hole matches the length of the limiting piece 6, so that the limiting piece 6 can contact the inner wall of the second tube 3 with a larger contact area, thereby improving the fixing stability and allowing the sliding rod 4 to extend outward more.

[0059] In one embodiment, the diameter of the first tube 2 is larger than the diameter of the anchor cable 11.

[0060] It is understandable that the diameter of the first tube 2 is larger than the diameter of the anchor cable 11 so that the anchor cable 11 can pass through the first tube 2 and connect with the push-pull rod 9.

[0061] In one embodiment, a plurality of sliding rods 4 are uniformly arranged on the second tube 3 and the hollow outer shell 1 along the circumferential and axial directions.

[0062] It is understandable that several sliding rods 4 are evenly arranged on the second tube 3 and the hollow shell 1 along the circumferential and axial directions, which is conducive to the uniform circumferential force of the anchor with retrievable anchor cable, and can provide force at different positions in the axial direction, so as to make the installation of the anchor with retrievable anchor cable more stable.

[0063] In one embodiment, the distance between the end of the sliding rod 4 near the anchor head 7 and the axis of the second tube 3 is less than the distance between the end of the sliding rod 4 away from the anchor head 7 and the axis of the second tube 3.

[0064] It is understandable that the distance between the end of the sliding rod 4 near the anchor head 7 and the axis of the second tube 3 is less than the distance between the end of the sliding rod 4 away from the anchor head 7 and the axis of the second tube 3. That is, from the perspective of the pushing direction of the anchor cable 11, the sliding rod 4 is inclined towards the axis of the second tube 3. In other words, when the sliding rod 4 slides into the anchor cable installation hole and pulls the anchor cable 11, the sliding rod 4 can provide a larger directional force to prevent the anchor cable 11 from being pulled arbitrarily.

[0065] In one embodiment, one end of the push-pull rod 9 is provided with a sliding part 901 for sliding connection with the third tube 8, and the diameter of the sliding part 901 matches the inner diameter of the third tube 8.

[0066] It is understandable that the push-pull rod 9 can slide in the third tube 8 by relying on the sliding part 901, and the diameter of the sliding part 901 is larger than the inner diameter of the internal thread tube 10, so the sliding part 901 cannot slide into the internal thread tube 10, which is beneficial for axially limiting the sliding part 901.

[0067] In one embodiment, when the end of the third tube 8 away from the internally threaded tube 10 contacts the sliding part 901, the limiting piece 6 contacts the inner wall of the second tube 3.

[0068] It is understandable that when the end of the third tube 8 away from the internally threaded tube 10 contacts the sliding part 901, the limiting piece 6 contacts the inner wall of the second tube 3, thereby preventing damage to components such as the push-pull linkage 5 due to excessive movement of the push-pull rod 9.

[0069] It should be noted that when the end of the third tube 8 away from the internally threaded tube 10 contacts the sliding part 901, it is best to make the limiting piece 6 completely close to the inner wall of the third tube 8.

[0070] In one embodiment, the thread direction of the internal thread on the internally threaded pipe 10 is the same as the thread direction of the internal thread on the push-pull rod 9.

[0071] It is understandable that the thread direction of the internal thread on the internal threaded tube 10 is the same as the thread direction of the internal thread on the push-pull rod 9, so that after the push-pull rod 9 rotates in one direction and is axially restricted by the internal threaded tube 10, the anchor cable 11 can rotate in the same direction to disengage from the push-pull rod 9, so as to facilitate the recovery of the anchor cable 11.

[0072] It should be noted that the middle part of the push-pull rod 9 is provided with an external thread to connect with the internal thread on the internal thread tube 10, and one end of the anchor cable 11 is provided with an external thread to connect with the internal thread on the push-pull rod 9.

[0073] In one embodiment, one end of a plurality of limiting plates 6 is provided with an annular connecting block 13 for sliding and hinged connection with the annular groove 14, the push-pull rod 9 is provided with a plurality of first circular grooves 15 for hinged connection with the push-pull connecting rod 5, and the limiting plates 6 are provided with second circular grooves 12 for hinged connection with the push-pull connecting rod 5.

[0074] It is understood that one end of several limiting pieces 6 can be slidably connected and hinged to the annular groove 14 through the annular connecting block 13; and the push-pull rod 9 can be hinged to the push-pull connecting rod through the first circular groove 15, and the limiting piece 6 can be hinged to the push-pull connecting rod 5 through the second circular groove 12.

[0075] This invention also provides a method for using a recyclable anchor, such as... Figure 1 and Figure 8 As shown, it includes the following steps:

[0076] Thread the anchor cable 11 onto the push-pull rod 9;

[0077] Push the anchor cable 11 until the retrievable anchor is inserted into the pre-drilled anchor installation hole;

[0078] Rotate the anchor cable 11 in one direction so that the push-pull rod 9 gradually moves away from the first tube 2, thereby driving the push-pull connecting rod 5 to push several limiting pieces 6 to expand outward around the annular groove 14, thereby causing several limiting pieces 6 to contact the inner wall of the second tube 3 and push one end of several sliding rods 4 into the anchor cable mounting hole to fix the anchor cable 11 in the anchor cable mounting hole.

[0079] Rotate the anchor cable 11 in the opposite direction so that the push-pull rod 9 gradually approaches the first tube 2, thereby driving the push-pull connecting rod 5 to pull several limiting pieces 6 to retract inward around the annular groove 14, thereby moving several limiting pieces 6 away from the inner wall of the second tube 3 until the push-pull rod 9 can no longer approach the first tube 2.

[0080] Continue to rotate the anchor cable 11 in the opposite direction to disengage the anchor cable 11 from the threaded connection with the push-pull rod 9, and then pull out the anchor cable 11 to retrieve it.

[0081] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0082] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An anchor with recyclable anchor cable, characterized in that, include: The shell includes a hollow outer shell (1) and an anchor head (7) disposed at one end of the hollow outer shell (1). A first tube (2) and a second tube (3) are coaxially and fixedly connected inside the hollow outer shell (1). The second tube (3) is located between the anchor head (7) and the first tube (2). The diameter of the end of the second tube (3) closer to the first tube (2) is larger than the diameter of the first tube (2). Several sliding rods (4) are provided through the side of the second tube (3) and the hollow outer shell (1). A push-pull component, comprising a third tube (8) coaxially fixedly connected within the second tube (3), wherein an internally threaded tube (10) is coaxially fixedly connected to one end of the third tube (8) near the first tube (2), and a push-pull rod (9) is internally threadedly connected to the internally threaded tube (10), wherein the two ends of the push-pull rod (9) extend outward from the two ends of the internally threaded tube (10), one end of the push-pull rod (9) is slidably connected within the third tube (8), and the other end of the push-pull rod (9) is threadedly connected to an anchor cable (11), wherein the inner diameter of the third tube (8) is larger than the inner diameter of the internally threaded tube (10); An umbrella-shaped component, comprising several limiting plates (6) and several push-pull connecting rods (5), an annular groove (14) is provided on the outer side of the third tube (8), one end of each of the limiting plates (6) is hinged in the annular groove (14), one end of the push-pull connecting rod (5) is hinged to the end of the push-pull rod (9) near the anchor cable (11), and the other end of the push-pull connecting rod (5) is hinged to the inner side of the limiting plate (6); When one end of the push-pull link (5) near the push-pull rod (9) approaches the internal threaded tube (10), the ends of the push-pull links (5) away from the push-pull rod (9) respectively push the limiting pieces (6) to expand outward around the annular groove (14), so that the limiting pieces (6) contact the inner wall of the second tube body (3) and push the sliding rods (4) outward.

2. The line-recoverable anchor of claim 1, wherein, The second tube (3) is provided with a tapered hole. The diameter of the tapered hole at the end away from the first tube (2) is smaller than the diameter of the tapered hole at the end closer to the first tube (2). The generatrix length of the tapered hole matches the length of the limiting piece (6).

3. The line-recoverable anchor of claim 1, wherein, The diameter of the first tube (2) is larger than the diameter of the anchor cable (11).

4. The recyclable anchorage according to claim 1, characterized in that, Several sliding rods (4) are evenly arranged circumferentially and axially on the second tube (3) and the hollow outer shell (1).

5. The line- retrievable anchor of claim 1, wherein, The distance between the end of the sliding rod (4) near the anchor head (7) and the axis of the second tube (3) is less than the distance between the end of the sliding rod (4) away from the anchor head (7) and the axis of the second tube (3).

6. The line- retrievable anchor of claim 1, wherein, One end of the push-pull rod (9) is provided with a sliding part (901) for sliding connection with the third tube (8), and the diameter of the sliding part (901) matches the inner diameter of the third tube (8).

7. The line- retrievable anchor of claim 6, wherein, When the end of the third tube (8) away from the internally threaded tube (10) contacts the sliding part (901), the limiting piece (6) contacts the inner wall of the second tube (3).

8. The line- retrievable anchor of claim 1, wherein, The thread direction of the internal thread on the internal threaded tube (10) is the same as the thread direction of the internal thread on the push-pull rod (9).

9. The recyclable anchorage according to claim 1, characterized in that, One end of each of the limiting pieces (6) is provided with an annular connecting block (13) for sliding and hinged connection with the annular groove (14), the push-pull rod (9) is provided with a plurality of first circular grooves (15) for hinged connection with the push-pull connecting rod (5), and the limiting piece (6) is provided with a second circular groove (12) for hinged connection with the push-pull connecting rod (5).

10. A method of using the anchor line-recoverable anchor according to any one of claims 1-9, characterized in that, Includes the following steps: The anchor cable (11) is threaded onto the push-pull rod (9); Push the anchor cable (11) until the retrievable anchor is inserted into the pre-drilled anchor installation hole; Rotate the anchor cable (11) in one direction so that the push-pull rod (9) gradually moves away from the first tube (2), thereby driving the push-pull connecting rod (5) to push several limiting pieces (6) to expand outward around the annular groove (14), thereby causing several limiting pieces (6) to contact the inner wall of the second tube (3) and push one end of several sliding rods (4) into the anchor cable mounting hole to fix the anchor cable (11) in the anchor cable mounting hole; Rotate the anchor cable (11) in the opposite direction so that the push-pull rod (9) gradually approaches the first tube (2), thereby driving the push-pull connecting rod (5) to pull several limiting pieces (6) to retract inward around the annular groove (14), thereby making several limiting pieces (6) move away from the inner wall of the second tube (3) until the push-pull rod (9) can no longer approach the first tube (2). Continue to rotate the anchor cable (11) in the opposite direction to disengage the anchor cable (11) from the threaded connection of the push rod (9), and then pull out the anchor cable (11) to recycle it.

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