Recoverable constant-resistance large-deformation anchor rod structure and installation and recovery method

Abstract

A recoverable constant-resistance large-deformation anchor rod structure comprises an anchoring section, an anchoring agent cartridge, an anchoring section conical head and an anchor rod, the anchor rod comprises an I-type anchor rod section and an II-type anchor rod section, and the I-type anchor rod section and the II-type anchor rod section are connected through an anchor rod body connecting sleeve. When a rotary connector of the sleeve pushing rotary rod rotates, the anchor rod body is driven to be connected with the sleeve, the I-type anchor rod section and the II-type anchor rod section. An octagonal sleeve upper connecting section of the anchor rod body connecting sleeve is connected with an II-type anchor rod section through threads on the inner wall of the octagonal sleeve upper connecting section, an octagonal sleeve lower connecting section is fixedly connected with an I-type anchor rod section through threads on the inner wall of the octagonal sleeve lower connecting section, and a middle separating section is used for separating the octagonal sleeve upper connecting section and the octagonal sleeve lower connecting section. The recyclable anchor rod can be recycled through disassembly and assembly after engineering is completed, the requirement for raw materials is reduced, sustainable utilization of resources is facilitated, the adverse effect on the environment is reduced, the recyclable anchor rod has high flexibility and can adapt to different engineering requirements, and due to the fact that the installation process of the recyclable anchor rod is relatively safe, the use risk is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of underground engineering, and in particular to a recoverable constant resistance large deformation anchor rod structure and an installation and recovery method. Background Art

[0002] As the excavation depth of underground projects continues to increase, the high ground stress, high ground temperature and high water pressure environment of deep underground projects have brought a series of engineering problems to their construction, such as rock bursts, large deformation due to squeezing, water inrush, etc. This has brought great difficulties to the excavation and support of the surrounding rock of deep underground projects. In this case, the anchor rods used are required to be able to adapt to large deformation of the surrounding rock without being damaged, and to be able to continuously provide a constant pulling force.

[0003] For deep rock projects with large deformation, rock burst and other disaster risks, the use of anchors that can tolerate large deformation is a good engineering solution. At present, a new type of anchor that can provide large deformation through the ductility of the anchor body's own material is not much different from the ordinary anchor. A series of large deformation anchors have been developed at home and abroad. The ductility of the anchor body itself is enhanced through special structural devices, so that the anchor can adapt to the deformation of the surrounding rock when subjected to large deformation loads and can continue to provide bearing capacity.

[0004] At present, the application of large deformation anchors has the following related deficiencies: (1) Large deformation anchors have high requirements on the ductility of materials, and the working resistance is not constant, which makes it difficult to meet the large deformation requirements of surrounding rocks. (2) At present, in the application of large deformation anchors, some large deformation anchors are left underground for a long time as temporary support structures and cannot be recovered, causing a large degree of environmental pollution; (3) The area of ​​large deformation anchor reinforcement projects may be rebuilt or otherwise repaired in the later stage. The removal of large deformation anchors is a large workload, which affects the progress of the project. At the same time, the anchor rod body has low reusability, resulting in a waste of resources. Summary of the invention

[0005] In order to overcome the above shortcomings, the present invention provides a recyclable constant resistance large deformation anchor rod structure and an installation and recycling method, which can be recycled through disassembly and reinstallation after the project is completed, reducing the demand for raw materials, being beneficial to the sustainable utilization of resources, and reducing the adverse impact on the environment. At the same time, the design and application of the recyclable anchor rod are highly flexible and can adapt to different engineering needs. Its parameters such as length, material and prestress can be adjusted and customized according to the requirements of the specific project. And because its installation process is relatively safe, it can reduce the risk of use.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A recyclable constant resistance large deformation anchor structure, comprising an anchoring section, a resin anchoring agent roll, an anchoring section conical head and an anchor rod, wherein the anchor rod comprises a type I anchor rod section and a type II anchor rod section, wherein the type I anchor rod section and the type II anchor rod section are connected via an anchor rod body connecting sleeve, and when the sleeve pushes a rotary joint of a rotary rod to rotate, the anchor rod body connecting sleeve, the type I anchor rod section and the type II anchor rod section are driven; The anchor rod body connecting sleeve structure includes an octagonal sleeve upper connecting section, a middle separation section, an octagonal sleeve lower connecting section, a thorn nail sliding cavity, magnetic high-strength thorn nails and high-strength thorn nail holes. The octagonal sleeve upper connecting section is connected and fixed to the type II anchor rod section through the threads arranged on its inner wall, and the octagonal sleeve lower connecting section is connected and fixed to the type I anchor rod section through the threads arranged on its inner wall. The middle separation section is used to separate the octagonal sleeve upper connecting section and the octagonal sleeve lower connecting section. A conical thorn nail sliding cavity is arranged on the upper part of the middle separation section, and high-strength thorn nail holes are evenly distributed on the outer wall of the thorn nail sliding cavity for sliding in the thorn holes.

[0007] Further optimization, the anchoring section includes an anchor pushing cavity, a joint connecting thread, an anchor rod I-type reinforcement thread and a constant resistance sliding extrusion cylinder, the upper part of the anchor pushing cavity is connected to the constant resistance sliding extrusion cylinder, and the lower part is connected to the joint connecting thread, and the anchor pushing cavity is used to pre-place a resin anchor roll, and the outer diameter and length of the anchor roll are smaller than the inner diameter and length of the anchor pushing cavity.

[0008] Further optimized, the conical head of the anchoring section includes a conical joint thread, an anchor rupture spike and an anchor outlet, the interior of the conical head of the anchoring section is hollow and provided with an anchor rupture spike for piercing the anchor roll, and the conical head of the anchoring section is connected to the anchor pushing cavity through the conical joint thread.

[0009] Further optimized, the I-type anchor rod section includes an I-type anchor rod body and a conical constant resistance body. The upper end of the I-type anchor rod section is connected to the lower connecting section of the octagonal sleeve through an I-type upper end anchoring thread, and the lower end is connected to the anchor section through an I-type lower end anchoring thread and an anchor rod I-type reinforcement thread. The lower end of the conical constant resistance body is installed in cooperation with the constant resistance sliding extrusion cylinder.

[0010] In further optimization, the anchoring agent roll slides downwardly under the push of the conical constant resistance body.

[0011] Further optimization, the Type II anchor rod segment includes a Type II anchor rod body and a conical thorn nail pushing rod, the Type II anchor rod body is connected to the lower connecting section of the octagonal sleeve by a Type II upper end anchoring thread arranged at its upper end, and the Type II anchor rod body is connected to the upper connecting section of the octagonal sleeve by a Type II lower end anchoring thread arranged at the lower end, and the conical thorn nail pushing rod is arranged at the lower end of the Type II anchor rod body and matches the thorn nail sliding cavity, and is used to push the evenly distributed high-strength thorn nail holes to slide in the thorn nail holes.

[0012] Further optimization, the sleeve pushing rotary rod includes an octagonal sleeve, a rotary rod lower connecting section, a rotary rod connecting sleeve, a rotary rod upper connecting section and an octagonal rotating joint connected in sequence, the octagonal sleeve matches the outer diameter size of the octagonal sleeve upper connecting section, the octagonal rotating joint is connected to the anchor drilling rig, and is used to drive the pushing rotary rod to rotate, the upper and lower ends of the rotary rod connecting sleeve are internally provided with threads, which are respectively used to connect the rotary rod lower connecting section and the rotary rod upper connecting section, and an isolation section is provided in the middle of the rotary rod connecting sleeve.

[0013] A method for installing and recovering a recyclable constant resistance large deformation anchor structure, the specific installation steps comprising: S1, using a drill to expand the hole bottom using an expansion drill bit; S2. Connect the I-type lower end anchoring thread with the anchor rod I-type reinforcement thread, and connect and fix the I-type lower end anchoring thread with the lower connecting section of the octagonal sleeve in sequence, place the anchoring agent roll in the anchoring agent pushing cavity, and connect and tighten the cone head of the anchoring section with the joint connecting thread; S3, push the anchor structure in S2 along the borehole to the bottom of the borehole, put the octagonal sleeve on the outer side of the connecting section of the octagonal sleeve, and connect the anchor drilling machine with the octagonal rotary joint; S4. The bolt drill rotates to drive the sleeve to push the rotary rod and the bolt support structure, pushing the I-type bolt section and the conical constant resistance body to move to the bottom of the borehole, while squeezing the anchor roll. The anchor roll is pierced by the anchor piercing spikes at the conical head of the anchor section and squeezed out through the anchor outlet; S5. The anchoring agent is dispersed around the anchoring structure until the conical constant resistance body is pushed to the bottom of the anchoring structure, and the packaging of the anchoring agent roll is left at the conical head of the anchoring section; S6. The rear anchor drill rig reverses the drilling, retracts the conical constant resistance body to the constant resistance sliding extrusion cylinder, and drives the anchor structure to rotate, and evenly squeezes and disperses the anchoring agent around the anchor structure. After the anchoring agent is anchored, the type II anchor section is fastened and connected with the lower connecting section of the octagonal sleeve, and the above fastener is pushed into the anchor hole by the sleeve push rod, and the anchor drill rig is used to screw the fastener into the upper connecting section of the octagonal sleeve; S7. Remove the fastening accessories outside the resin anchor rod, and use the anchor drill to remove the Type II anchor rod section at the outer end. The external pressure of the magnetic high-strength spike is released, and it can slide freely along the puncture hole. Knock the anchor rod to let the spike gradually slide along the puncture hole. S8, use the octagonal sleeve to cover the outer side of the connecting section of the octagonal sleeve, connect the anchor drill to the octagonal rotary joint, rotate the anchor drill in the opposite direction to drive the anchor body connecting sleeve to rotate, and remove the anchor body connecting sleeve; S9. Repeat the above operation to recover the constant resistance large deformation anchor rod components one by one, thus completing the recovery of the constant resistance large deformation anchor rod.

[0014] Further optimization, in step S6, during the process of screwing the fasteners of the type II anchor rod section and the lower connecting section of the octagonal sleeve into the upper connecting section of the octagonal sleeve, the conical spike push rod pushes the magnetic high-strength spike to slide into the hole, and the magnetic high-strength spike slides to the hole wall and is pressed into the formation under the pressure of the push rod.

[0015] The beneficial effects of the present invention are: (1) The method for synchronously installing the anchoring agent roll and the anchor rod component proposed by the present invention squeezes, punctures and squeezes out the resin anchoring agent roll through the combined structure of the anchor rod anchoring agent pushing cavity, the conical constant resistance body and the conical head of the anchoring section. At the same time, the conical head can prevent the resin anchoring agent from flowing back, thus solving the problem of breaking and spilling of the anchoring agent during the pushing process of the conveying rod, and efficiently separating the packaging structure from the anchoring agent, thereby improving the anchoring effect. The method is simple, easy to implement and highly popularizable. (2) The present invention proposes a structure for enhancing the resistance of the constant resistance large deformation anchor rod, through the structure of the piercing nail sliding cavity; magnetic high-strength piercing nails, conical piercing nail pushing rods, etc., in the process of connecting components in the borehole, the sliding cavity is conical, and the conical pushing rod presses the high-strength piercing nail into the formation, thereby increasing the friction support effect of the constant resistance anchor rod on the formation. The method is easy to operate and has strong practicality. The number and position of the anchor rod can be adjusted according to different working conditions, and the convenience is strong. (3) The method for recyclable anchor rods with constant resistance and large deformation provided by the present invention relies on the connection characteristics between the anchor rod component type I anchor rod section, the anchor rod body connecting sleeve, the type II anchor rod section, and the sleeve push-rotating rod to achieve the maximum degree of recovery of the anchor rod component, increase the recycling rate of materials, reduce losses, and has the characteristics of carbon reduction, greenness, and high promotion and applicability; (4) The method for enhancing constant resistance and large deformation of the present invention comprises the threaded fastening connection between the anchor rod type I reinforcing thread and the type I lower end anchoring thread, the wedge-shaped extrusion effect between the conical constant resistance body and the constant resistance sliding extrusion cylinder, and the anchoring effect between the magnetic high-strength spike and the formation. The combined effect of the above structures strengthens the anchoring effect of the recyclable constant resistance and large deformation anchor rod as a whole. The anchoring effect is better than that of the traditional structure, the resource utilization rate is higher, the disassembly and installation are simple, and the application and promotion value is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the recyclable resin anchor; Figure 2 It is a schematic diagram of the anchoring section structure; Figure 3 This is a schematic diagram of the anchor discharge joint structure; Figure 4 This is the structural diagram of the I-type anchor section; Figure 5 It is a schematic diagram of the anchor rod body connecting sleeve structure; Figure 6It is a plane schematic diagram of the anchor body connecting sleeve; Figure 7 This is the structural diagram of the type II anchor section; Figure 8 This is a schematic diagram of the sleeve pushing rotary rod structure; Figure numerals: 1, anchoring section, 1-1, anchor pushing cavity, 1-2, joint connection thread, 1-3, anchor rod I-type reinforcement thread, 1-4, constant resistance sliding extrusion cylinder, 2, anchor drug roll, 3, anchor section conical head, 3-1, conical joint thread, 3-2, anchor agent breach spike, 3-3, anchor agent outlet, 4, I-type anchor rod section, 4-1, I-type upper end anchor thread, 4-2, I-type anchor rod body, 4-3, I-type lower end anchor thread, 4-4, conical constant resistance body, 5, anchor rod body connection sleeve, 5-1, octagonal sleeve Connecting section on the cylinder, 5-2, middle separation section, 5-3, octagonal sleeve lower connecting section, 5-4, thorn nail sliding cavity, 5-5, magnetic high-strength thorn nail, 5-6, high-strength thorn nail hole, 6, type II anchor rod section, 6-1, type II upper end anchoring thread, 6-2, type II anchor rod body, 6-3, type II lower end anchoring thread, 6-4, conical thorn nail pushing rod, 7, sleeve pushing rotary rod, 7-1, octagonal sleeve, 7-2, rotary rod lower connecting section, 7-3, rotary rod connecting sleeve, 7-4, rotary rod upper connecting section, 7-5, octagonal rotary joint. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is described in detail below in conjunction with specific embodiments. The following embodiments are implemented based on the technical solutions of the present invention, and detailed implementation methods and specific operating procedures are given. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the following embodiments.

[0018] A recyclable constant resistance large deformation anchor rod structure comprises an anchoring section 1, an anchoring agent roll 2, an anchoring section conical head 3 and an anchor rod, wherein the anchor rod comprises a type I anchor rod section 4 and a type II anchor rod section 6.

[0019] The anchoring section 1 includes an anchor pushing cavity 1-1, a joint connecting thread 1-2, an anchor rod I-type reinforcement thread 1-3 and a constant resistance sliding extrusion cylinder 1-4. The upper part of the anchor pushing cavity 1-1 is connected to the constant resistance sliding extrusion cylinder 1-4, and the lower part is connected to the joint connecting thread 1-2. The anchor pushing cavity 1-1 is used to pre-place an anchor roll 2. The outer diameter and length of the anchor roll 2 are smaller than the inner diameter and length of the anchor pushing cavity 1-1.

[0020] The conical head 3 of the anchoring section includes a conical joint thread 3-1, an anchor opening spike 3-2 and an anchor outlet 3-3. The interior of the conical head of the anchoring section is hollow and provided with an anchor opening spike 3-2 for puncturing the anchor medicine roll 2. After the anchor medicine roll 2 is squeezed and punctured, the outer packaging of the medicine roll is left and fixed at the conical head. Not only can the anchor flow and diffuse into the borehole through the anchor outlet 3-3, but also the backflow of the anchor medicine roll 2 can be blocked. The conical head 3 of the anchoring section is connected to the anchor pushing cavity 1-1 through the conical joint thread 3-1.

[0021] The I-type anchor segment 4 and the II-type anchor segment 6 are connected via an anchor body connecting sleeve 5. When the sleeve pushes the rotary joint of the rotary rod 7 to rotate, it drives the 5-anchor body connecting sleeve, the I-type anchor segment 4 and the II-type anchor segment 6. The I-type anchor segment 4 includes an I-type anchor rod body 4-2 and a conical constant resistance body 4-4. The upper end of the I-type anchor segment 4 is connected to the octagonal sleeve lower connecting section 5-3 through an I-type upper end anchoring thread 4-1, and the lower end is connected to the anchor segment 1 through an I-type lower end anchoring thread 4-3 and a 1-3-anchor I-type reinforcement thread. The lower end of the conical constant resistance body 4-4 is installed in cooperation with the constant resistance sliding extrusion cylinder 1-4, and the step-shaped change section of the wall thickness can provide a constant resistance anchoring support function.

[0022] The 5-anchor body connecting sleeve structure includes an octagonal sleeve upper connecting section 5-1, a middle separation section 5-2, an octagonal sleeve lower connecting section 5-3, a nail sliding cavity 5-4, a magnetic high-strength nail 5-5 and a high-strength nail hole 5-6. The octagonal sleeve upper connecting section 5-1 is connected and fixed to the II-type anchor section 6 through the threaded connection arranged on its inner wall, and the octagonal sleeve lower connecting section 5-3 is connected and fixed to the I-type anchor section 4 through the threaded connection arranged on its inner wall. The middle separation section 5-2 is used to separate the octagonal sleeve upper connecting section 5-1 and the octagonal sleeve lower connecting section 5-3. A conical thorn nail sliding cavity 5-4 is arranged on the upper part of the separation section 5-2, and high-strength thorn nails 5-5 are evenly distributed on the outer wall of the thorn nail sliding cavity 5-4. One high-strength thorn nail 5-5 is evenly distributed in each high-strength thorn nail hole 5-6. The diameter of the high-strength thorn nail 5-5 is slightly smaller than the high-strength thorn nail hole 5-6, and it is used to slide in the thorn hole. The gap between the thorn nail hole and the high-strength thorn nail hole 5-6 is filled with plasticine to ensure that the high-strength thorn nail 5-5 can maintain a fixed position during the process of the anchor rod rotating to squeeze the anchoring agent, and the high-strength thorn nail 5-5 does not contact the wall of the drilled hole to avoid damage to the thorn nail during the rotation process.

[0023] The type II anchor rod section 6 includes a type II anchor rod body 6-2 and a conical thorn nail pushing rod 6-4. The type II anchor rod body 6-2 is connected to the octagonal sleeve lower connecting section 5-3 through a 6-1-II type upper end anchoring thread arranged at its upper end. The type II anchor rod body 6-2 is connected to the octagonal sleeve upper connecting section 5-1 through a type II lower end anchoring thread 6-3. The conical thorn nail pushing rod 6-4 is arranged at the lower end of the type II anchor rod body 6-2 and matches the thorn nail sliding cavity 5-4, and is used to push the evenly distributed high-strength thorn nail holes 5-6 to slide in the thorn nail holes. The thorn nails penetrate into the formation under pressure, thereby enhancing the overall anchoring effect of the resin anchor on the formation.

[0024] The sleeve push rotary rod 7 includes an octagonal sleeve 7-1, a rotary rod lower connecting section 7-2, a rotary rod connecting sleeve 7-3, a rotary rod upper connecting section 7-4 and an octagonal rotary joint 7-5 connected in sequence. The octagonal sleeve 7-1 matches the outer diameter of the octagonal sleeve upper connecting section 5-1, and the inner diameter of the rotary joint is slightly larger than the outer diameter of the upper connecting section, so that the rotary joint can drive the anchor body connecting sleeve 5, the type I anchor section 4 and the type II anchor section 6 when rotating. The octagonal rotary joint 7-5 is connected to the anchor drilling rig and is used to drive the push rotary rod to rotate. The upper and lower ends of the rotary rod connecting sleeve 7-3 are internally provided with threads, which are respectively used to connect the rotary rod lower connecting section 7-2 and the rotary rod upper connecting section 7-4. An isolation section is provided in the middle of the rotary rod connecting sleeve 7-3.

[0025] A method for installing and recovering a recyclable constant resistance large deformation anchor structure, the specific installation steps comprising: S1. According to the anchoring length of the resin anchor, the anchoring section 1 is set to have a structural length of 0.4m, the anchor diameter is designed to be 25mm, the drilling bit diameter is 42mm, the drilling diameter is 44mm, and the anchor design depth is 3m; the drilling diameter is 44mm. In order to ensure that the anchoring structure can penetrate the drill hole, the outer diameter of the anchoring section 1 is controlled to be 40mm, and a 48mm diameter drill bit is selected to expand the hole bottom with an expansion drill bit, and the expansion depth is 0.4m, so that the anchoring section can introduce the anchoring agent in the expansion section for anchoring; S2, in the anchor hole, connect the I-type lower end anchoring thread 4-3 of the I-type anchor section 4 with the anchor I-type reinforcement thread 1-3, and connect and fix the I-type lower end anchoring thread 4-3 with the lower connection 5-3 of the octagonal sleeve in sequence, then place the anchoring agent roll 2 in the anchoring agent pushing cavity 1-1, the size of the anchoring agent roll 2 is 28mm in diameter and 30cm in length, the length of the constant resistance sliding extrusion cylinder 1-4 is 10cm, and then the anchoring section 1 connects the anchoring section conical head 3 with the joint connection thread 1-2 and tightens it; S3, place the magnetic high-strength spikes 5-5 in the high-strength spike holes 5-6 in sequence, fill the gaps between the spike holes 5-6 and the magnetic high-strength spikes 5-5 with plasticine to ensure that the spikes can maintain a fixed position during the process of the anchor rod rotating and squeezing the anchoring agent roll 2, and the magnetic spikes do not contact the borehole wall to avoid damage to the magnetic high-strength spikes 5-5 during the rotation process, push the anchor rod structure in S2 along the borehole to the bottom of the borehole, use an octagonal sleeve 7-1 to connect the outer side of the upper connecting section 5-1 of the octagonal sleeve, and connect the anchor drilling rig to the octagonal rotary joint 7-5; S4, the anchor drill rotates to drive the sleeve to push the rotary rod 7 and the anchor support structure, pushing the I-type anchor section 4 and the conical constant resistance body 4-4 to move to the bottom of the borehole, while squeezing the anchor drug roll 2, the anchor drug roll 2 is pierced by the anchor piercing spike 3-2 at the conical head 3 of the anchor section, and is squeezed out through the anchor outlet 3-3; S5, the anchoring agent is dispersed around the anchoring structure until the conical constant resistance body 4-4 is pushed to the bottom of the anchoring structure, and the packaging of the anchoring agent roll 2 is left at the conical head 3 of the anchoring section, which can prevent the backflow of the later resin anchoring agent into the conical head; S6, the rear anchor drill reverses the drilling, retracts the conical constant resistance body 4-4 to the constant resistance sliding extrusion cylinder 1-4, and drives the anchor structure to rotate, and evenly squeezes and disperses the anchoring agent around the anchor structure. After the anchoring agent is anchored, the component type II anchor segment 6 is connected and tightened with the lower connecting segment 5-3 of the octagonal sleeve, and then the above fastener is pushed into the anchor hole through the sleeve push rod 7, and the conical spike 6-4 push rod is aligned with the center of the upper connecting segment 5-1 of the octagonal sleeve, the anchor drill is connected to the octagonal rotary joint 7-5, and the anchor drill is started. The fastener of the lower connecting section 5-3 of the angular sleeve is screwed into the upper connecting section 5-1 of the octagonal sleeve. During this process, the conical spike push rod 6-4 pushes the magnetic high-strength spike 5-5 to slide into the hole. The magnetic high-strength spike 5-5 slides to the hole wall and is pressed into the formation under the pressure of the push rod, thereby improving the anchoring effect of the resin anchor rod on the formation as a whole. At the same time, the length of the type II anchor rod section 6 is appropriately adjusted according to the drilling depth. Step S3 is repeated to fasten the component type II anchor rod section 6 and the anchor rod body connecting sleeve 5 and then connect them to the anchor rod component in the drilled hole until the designed length of the anchor rod is met; S7, remove the fastening accessories outside the resin anchor, and use the anchor drill to remove the type II anchor section 6 at the outer end, release the external pressure of the magnetic high-strength spike 5-5, and allow it to slide freely along the puncture hole, and knock the anchor to let the spike gradually slide along the puncture hole; S8, use the octagonal sleeve 7-1 to cover the outer side of the connecting section of the octagonal sleeve 5-1, connect the anchor drill with the octagonal rotary joint 7-5, rotate the anchor drill in the opposite direction to drive the anchor body connecting sleeve 5 to rotate, and remove the 5-anchor body connecting sleeve; S9, repeat the above step S8 to successively recycle the constant resistance large deformation anchor components, thus completing the recycling of the constant resistance large deformation anchor.

[0026] The above shows and describes the main features, methods of use, basic principles and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements according to actual conditions, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A recyclable constant resistance large deformation anchor structure, comprising an anchoring section (1), an anchoring agent roll (2), an anchoring section conical head (3) and an anchor, characterized in that: The anchor rod comprises a type I anchor rod segment (4) and a type II anchor rod segment (6); the type I anchor rod segment (4) and the type II anchor rod segment (6) are connected via an anchor rod body connecting sleeve (5); when the sleeve pushes the rotary rod (7) to rotate, the rotary joint drives the anchor rod body connecting sleeve (5), the type I anchor rod segment (4) and the type II anchor rod segment (6); The anchor rod body connecting sleeve (5) comprises an octagonal sleeve upper connecting section (5-1), a middle separating section (5-2), an octagonal sleeve lower connecting section (5-3), a thorn nail sliding cavity (5-4), a magnetic high-strength thorn nail (5-5) and a high-strength thorn nail hole (5-6). The octagonal sleeve upper connecting section (5-1) is connected and fixed to the type II anchor rod section (6) through a thread arranged on its inner wall, and the octagonal sleeve lower connecting section (5-3) is connected and fixed to the type I anchor rod section (4) through a thread arranged on its inner wall. The middle separating section (5-2) is used to separate the octagonal sleeve upper connecting section (5-1) and the octagonal sleeve lower connecting section (5-3). A conical thorn nail sliding cavity (5-4) is arranged on the upper part of the middle separating section (5-2), and high-strength thorn nail holes (5-6) are evenly distributed on the outer wall of the thorn nail sliding cavity (5-4) for sliding in the thorn holes.

2. A recyclable constant resistance large deformation anchor structure as claimed in claim 1, characterized in that: The anchoring section (1) comprises an anchor pushing cavity (1-1), a joint connecting thread (1-2), an anchor rod I-type reinforcement thread (1-3) and a constant resistance sliding extrusion cylinder (1-4); the upper portion of the anchor pushing cavity (1-1) is connected to the constant resistance sliding extrusion cylinder (1-4), and the lower portion is connected to the joint connecting thread (1-2); the anchor pushing cavity (1-1) is used to pre-place an anchor roll (2); the outer diameter and length of the anchor roll (2) are smaller than the inner diameter and length of the anchor pushing cavity (1-1).

3. A recyclable constant resistance large deformation anchor structure as claimed in claim 1, characterized in that: The anchoring section conical head (3) comprises a conical joint thread (3-1), an anchoring agent rupture spike (3-2) and an anchoring agent outlet (3-3); the anchoring section conical head (3) is hollow inside and provided with an anchoring agent rupture spike (3-2) for puncturing the anchoring agent roll (2); the anchoring section conical head (3) is connected to the anchoring agent pushing cavity (1-1) via the conical joint thread (3-1).

4. A recyclable constant resistance large deformation anchor structure as claimed in claim 1, characterized in that: The I-type anchor rod section (4) comprises an I-type anchor rod body (4-2) and a conical constant resistance body (4-4); the upper end of the I-type anchor rod section (4) is connected to the octagonal sleeve lower connecting section (5-3) via an I-type upper end anchoring thread (4-1); the lower end is connected to the anchor section (1) via an I-type lower end anchoring thread (4-3) and an anchor rod I-type reinforcement thread (1-3); the lower end of the conical constant resistance body (4-4) is mounted in cooperation with the constant resistance sliding extrusion cylinder (1-4).

5. A recyclable constant resistance large deformation anchor structure as claimed in claim 4, characterized in that: The anchoring agent roll (2) slides upward under the push of the conical constant resistance body (4-4).

6. A recyclable constant resistance large deformation anchor structure as claimed in claim 1, characterized in that: The type II anchor rod section (6) comprises a type II anchor rod body (6-2) and a conical spike pushing rod (6-4); the type II anchor rod body (6-2) is connected to the octagonal sleeve lower connecting section (5-3) via a type II upper end anchoring thread (6-1) arranged at its upper end; the type II anchor rod body (6-2) is connected to the octagonal sleeve upper connecting section (5-1) via a type II lower end anchoring thread (6-3) arranged at its lower end; the conical spike pushing rod (6-4) is arranged at the lower end of the type II anchor rod body (6-2) and matches the spike sliding cavity (5-4) and is used to push the evenly distributed high-strength spike holes (5-6) to slide in the spike holes.

7. A recyclable constant resistance large deformation anchor structure as claimed in claim 1, characterized in that: The sleeve push rotary rod (7) comprises an octagonal sleeve (7-1), a rotary rod lower connecting section (7-2), a rotary rod connecting sleeve (7-3), a rotary rod upper connecting section (7-4) and an octagonal rotary joint (7-5) which are connected in sequence. The outer diameters of the octagonal sleeve (7-1) and the octagonal sleeve upper connecting section (5-1) match each other. The octagonal rotary joint (7-5) is connected to the anchor drilling machine and is used to drive the push rotary rod to rotate. The upper and lower ends of the rotary rod connecting sleeve (7-3) are provided with threads, which are respectively used to connect the rotary rod lower connecting section (7-2) and the rotary rod upper connecting section (7-4). An isolation section is provided in the middle of the rotary rod connecting sleeve (7-3).

8. A method for installing and recovering a recoverable constant resistance large deformation anchor structure as claimed in claims 1 to 7, characterized in that: The specific installation steps include: S1, using a drill to expand the hole bottom using an expansion drill bit; S2, connecting the I-type lower end anchoring thread (4-3) with the anchor rod I-type reinforcement thread (1-3), and connecting and fixing the I-type lower end anchoring thread (4-3) with the octagonal sleeve lower connecting section (5-3) in sequence, placing the anchoring agent roll (2) in the anchoring agent pushing cavity (1-1), and connecting the anchoring section conical head (3) with the joint connecting thread (1-2) and tightening them; S3, pushing the anchor structure in S2 along the borehole to the bottom of the borehole, using an octagonal sleeve (7-1) to cover the outside of the octagonal sleeve upper connecting section (5-1), and connecting the anchor drilling machine to the octagonal rotary joint (7-5); S4, the bolt drill rotates to drive the sleeve to push the rotary rod (7) and the bolt support structure, pushing the I-type bolt section (4) and the conical constant resistance body (4-4) to move toward the bottom of the borehole, while squeezing the anchoring agent roll (2), the anchoring agent roll (2) is punctured by the anchoring agent piercing spike (3-2) at the conical head (3) of the anchoring section, and is squeezed out through the anchoring agent outlet (3-3); S5, the anchoring agent is dispersed around the anchoring structure until the conical constant resistance body (4-4) is pushed to the bottom of the anchoring structure, and the packaging of the anchoring agent roll (2) is left at the conical head (3) of the anchoring section; S6, the rear anchor drill reverses the drilling, retracts the conical constant resistance body (4-4) to the constant resistance sliding extrusion cylinder (1-4), and drives the anchor structure to rotate, and evenly squeezes and disperses the anchoring agent around the anchor structure. After the anchoring agent is anchored, the type II anchor section (6) is fastened and connected with the lower connecting section (5-3) of the octagonal sleeve, and the above-mentioned fastener is pushed into the anchor hole by the sleeve pushing screw (7), and the fastener is screwed into the upper connecting section (5-1) of the octagonal sleeve by using the anchor drill; S7, remove the fastening accessories on the outside of the resin anchor, and use an anchor drill to remove the Type II anchor section (6) at the outer end, release the external pressure of the magnetic high-strength spike (5-5), and allow it to slide freely along the puncture hole, and knock the anchor to allow the spike to gradually slide down along the puncture hole; S8, using the octagonal sleeve (7-1) to be sleeved on the outer side of the upper connecting section of the octagonal sleeve (5-1), the anchor drill is connected to the octagonal rotary joint (7-5), the anchor drill rotates in the opposite direction to drive the anchor body connecting sleeve (5) to rotate, and the anchor body connecting sleeve (5) is removed; S9, repeat the above step S8 to successively recycle the constant resistance large deformation anchor components, thus completing the recycling of the constant resistance large deformation anchor.

9. The method for installing and recovering a recoverable constant resistance large deformation anchor structure as claimed in claim 8, characterized in that: In the step S6, during the process of screwing the fasteners of the II-type anchor rod section (6) and the lower connecting section (5-3) of the octagonal sleeve into the upper connecting section (5-1) of the octagonal sleeve, the conical spike (6-4) pushes the high-strength magnetic spike (5-5) to slide into the hole, and the high-strength magnetic spike (5-5) slides to the hole wall and is pressed into the formation under the pressure of the push rod.

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