A recyclable constant resistance large deformation anchor structure and its installation and recycling method

Abstract

A recyclable constant resistance large deformation anchor rod structure, comprising an anchoring section, an anchoring agent cartridge, an anchoring section conical head and an anchor rod, the anchor rod comprising an I type anchor rod section and a II type anchor rod section, the I type anchor rod section and the II type anchor rod section being connected through an anchor rod body connecting sleeve, the sleeve driving the anchor rod body connecting sleeve, the I type anchor rod section and the II type anchor rod section when a rotating joint of a rotating rod of the sleeve rotates; an octagonal sleeve upper connecting section of the anchor rod body connecting sleeve being connected with the II type anchor rod section through threads in an inner wall of the octagonal sleeve upper connecting section, an octagonal sleeve lower connecting section being connected with the I type anchor rod section through threads in an inner wall of the octagonal sleeve lower connecting section, and an intermediate spacing section being used to separate the octagonal sleeve upper connecting section and the octagonal sleeve lower connecting section. The recyclable anchor rod can be recycled through disassembly after a project is completed, reducing the demand for raw materials, being conducive to sustainable use of resources, reducing adverse effects on the environment, having high flexibility, being able to adapt to different engineering requirements, and reducing use risks due to a relatively safe installation process.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering, and in particular to a recyclable constant-resistance large-deformation anchor rod structure and an installation and recycling 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 in which deep underground projects are located have brought a series of engineering problems to their construction, such as rock bursts, large deformation due to compression, and water inrush. This has brought huge difficulties to the excavation and support of the surrounding rock of deep underground projects. In this case, the anchor rods used need to be able to adapt to large deformation of the surrounding rock without being damaged and to be able to continuously provide constant pulling force.

[0003] For deep rock mass projects with high deformation and rockburst risks, the use of large deformation-tolerant anchors is a preferred engineering solution. Currently, new anchors are being developed that leverage the ductility of the anchor material to accommodate large deformation. These anchors are structurally similar to conventional anchors. A series of large deformation anchors have been developed both domestically and internationally. These anchors utilize special structural devices to enhance the ductility of the anchor body, enabling the anchor to adapt to the deformation of the surrounding rock and maintain its load-bearing capacity when subjected to large deformation loads.

[0004] At present, the application of large deformation anchor rods has the following related deficiencies: (1) Large deformation anchor rods have high requirements for material ductility and unstable working resistance, which makes it difficult to meet the large deformation requirements of surrounding rock. (2) In the current application of large deformation anchor rods, some large deformation anchor rods 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 rod reinforcement project may be rebuilt or otherwise repaired in the later stage. The removal of large deformation anchor rods 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 by disassembly and reinstallation after the project is completed, reducing the demand for raw materials, being conducive 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:

[0007] 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. The anchor rod comprises a type I anchor rod section and a type II anchor rod section. The type I anchor rod section and the type II anchor rod section are connected by an anchor rod body connecting sleeve. When the sleeve pushes the rotary joint of the 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.

[0008] The anchor rod body connecting sleeve structure includes an octagonal sleeve upper connecting section, a middle separating 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 threaded connection 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 threaded connection arranged on its inner wall. The middle separating 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 separating 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 hole.

[0009] 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. The anchor pushing cavity is used to pre-place the 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.

[0010] Further optimization, 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 puncturing the anchor roll. The conical head of the anchoring section is connected to the anchor pushing cavity through the conical joint thread.

[0011] Further optimized, the I-type anchor rod segment includes an I-type anchor rod body and a conical constant resistance body. The upper end of the I-type anchor rod segment is connected to the lower connecting section of the octagonal sleeve through an I-type upper end anchoring thread, and its 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.

[0012] In further optimization, the anchoring agent coil slides downward under the push of the conical constant resistance body.

[0013] Further optimized, 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 through 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 through a Type II lower end anchoring thread arranged at the lower end. 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.

[0014] 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 rotary joint connected in sequence, the octagonal sleeve matches the outer diameter size of the octagonal sleeve upper connecting section, the octagonal rotary joint is connected to the anchor drilling rig, and is used to drive the pushing rotary rod to rotate, and 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.

[0015] A method for installing and recovering a recyclable constant resistance large deformation anchor structure, wherein the specific installation steps include:

[0016] S1, using a reaming drill bit to expand the hole bottom through the drill bit;

[0017] S2. Connect the I-type lower end anchor thread to the anchor rod I-type reinforcement thread, and connect and fix the I-type lower end anchor thread to the lower connecting section of the octagonal sleeve in sequence, place the anchor agent roll in the anchor agent pushing cavity, and connect the anchor section conical head to the joint connecting thread and tighten it;

[0018] S3, push the anchor structure in S2 along the drill hole to the bottom of the drill hole, put the octagonal sleeve on the outer side of the connecting section of the octagonal sleeve, and connect the anchor drilling rig to the octagonal rotary joint;

[0019] S4. The anchor drill rotates to drive the sleeve to push the rotary rod and the anchor support structure, pushing the I-type anchor section and the conical constant resistance body to the bottom of the borehole, while squeezing the anchor agent roll. The anchor agent roll is punctured by the anchor agent rupture spikes at the conical head of the anchor section and squeezed out through the anchor agent outlet;

[0020] 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;

[0021] S6. Back-drill with the rear anchor drill, retract the conical constant resistance body to the constant resistance sliding extrusion cylinder, and drive the anchor structure to rotate, evenly extruding and distributing the anchoring agent around the anchor structure. After the anchoring agent is anchored, fasten the type II anchor section to the lower connecting section of the octagonal sleeve, push the above fastener into the anchor hole through the sleeve push rod, and use the anchor drill to screw the fastener into the upper connecting section of the octagonal sleeve.

[0022] S7. Remove the fastening accessories on the outside of the resin anchor and use an anchor drill to remove the Type II anchor 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. Tap the anchor to allow the spike to gradually slide down along the puncture hole.

[0023] S8, a octagonal sleeve is sleeved on the outside of the octagonal sleeve connecting section, the anchor rod drill is connected with the octagonal rotary joint, the anchor rod drill is reversely rotated to drive the rotation of the anchor rod body connecting sleeve, and the anchor rod body connecting sleeve is removed;

[0024] S9, the above operations are repeated to recycle the constant resistance large deformation anchor rod member one by one, that is, the recycling of the constant resistance large deformation anchor rod is completed.

[0025] Further optimization, in the step S6, in the process of rotating the fastener 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 stratum under the pressure of the push rod.

[0026] The beneficial effects of the present application are:

[0027] (1) The method for synchronously installing the anchoring agent cartridge and the anchor rod member provided by the present application solves the problems of skin breaking and scattering of the resin anchoring agent in the pushing process through the transmission rod by combining the structures of the anchor rod anchoring agent pushing cavity, the conical constant resistance body and the anchor section conical head to extrude, pierce and extrude the resin anchoring agent cartridge, and the conical head can prevent the backflow of the resin anchoring agent, efficiently separates the packaging structure from the anchoring agent, improves the anchoring effect, and has the advantages of simplicity, easy operation and high popularization.

[0028] (2) The present application provides a structure for enhancing the resistance of the constant resistance large deformation anchor rod, which comprises a spike sliding cavity, a magnetic high-strength spike and a conical spike push rod, and in the process of connecting the member in the borehole, the sliding cavity is conical, the high-strength spike is pressed into the stratum by the conical push rod, the friction supporting effect of the constant resistance anchor rod on the stratum is increased, the method is easy to operate and has strong practicality, the number and position can be adjusted according to different working conditions, and the method is convenient to use.

[0029] (3) The method for the constant resistance large deformation recyclable anchor rod provided by the present application relies on the connection characteristics among the anchor rod member I-type anchor rod section, the anchor rod body connecting sleeve, the type II anchor rod section and the sleeve pushing rotary rod to realize the maximum recycling of the anchor rod member, increase the recycling rate of the material, reduce the loss, and has the characteristics of carbon reduction, green, and high popularization and application.

[0030] (4) The method for enhancing the constant resistance large deformation provided by the present application comprises the threaded fastening connection of the anchor rod I-type reinforcing thread and the I-type lower end anchoring thread, the wedge-shaped extrusion effect of the conical constant resistance body and the constant resistance sliding extrusion cylinder, and the anchoring effect of the magnetic high-strength spike on the stratum, and the above-mentioned structures comprehensively enhance the anchoring effect of the recyclable constant resistance large deformation anchor rod, 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 method has high application and popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 This is a schematic diagram of the recyclable resin anchor structure;

[0032] Figure 2 Schematic diagram of the anchoring section structure;

[0033] Figure 3 This is a schematic diagram of the anchor discharge joint structure;

[0034] Figure 4 This is the structural diagram of the I-type anchor section;

[0035] Figure 5 Schematic diagram of the anchor rod body connecting sleeve structure;

[0036] Figure 6 It is a plan view of the anchor rod body connecting sleeve;

[0037] Figure 7 This is the structural diagram of the type II anchor bolt segment;

[0038] Figure 8 This is a schematic diagram of the sleeve pushing rotary rod structure;

[0039] Figure markings: 1, anchoring section, 1-1, anchor pushing cavity, 1-2, joint connecting thread, 1-3, anchor rod I type reinforcement thread, 1-4, constant resistance sliding extrusion cylinder, 2, anchoring agent roll, 3, anchoring section conical head, 3-1, conical joint thread, 3-2, anchoring agent rupture spike, 3-3, anchoring agent outlet, 4, I-type anchor rod section, 4-1, I-type upper end anchoring thread, 4-2, I-type anchor rod body, 4-3, I-type lower end anchoring thread, 4-4, conical constant resistance body, 5, anchor rod body connecting 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

[0040] In order to more clearly understand the above-mentioned objects, 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 provide detailed implementation methods and specific operating procedures. 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.

[0041] 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.

[0042] 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 the anchor medicine roll 2. The outer diameter and length of the anchor medicine roll 2 are smaller than the inner diameter and length of the anchor pushing cavity 1-1.

[0043] The conical head 3 of the anchoring section includes a conical joint thread 3-1, an anchor agent rupture spike 3-2 and an anchor agent outlet 3-3. The interior of the conical head of the anchoring section is hollow and provided with an anchor agent rupture spike 3-2, which is used to puncture the anchor agent roll 2. After the anchor agent roll 2 is squeezed and punctured, the outer packaging of the roll is left and fixed at the conical head. Not only can the anchor agent flow and diffuse into the borehole through the anchor agent outlet 3-3, but it can also prevent the backflow of the anchor agent roll 2. The conical head 3 of the anchoring section is connected to the anchor agent pushing cavity 1-1 through the conical joint thread 3-1.

[0044] 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 rod 7, the rotary joint 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 via an I-type upper end anchoring thread 4-1, and the lower end is connected to the anchor segment 1 via 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 conjunction with the constant resistance sliding extrusion cylinder 1-4. The step-shaped change in wall thickness can provide constant resistance anchoring support.

[0045] The 5-anchor body connecting sleeve structure includes an octagonal sleeve upper connecting section 5-1, an intermediate spacing section 5-2, an octagonal sleeve lower connecting section 5-3, a spike sliding cavity 5-4, a magnetic high-strength spike 5-5, and a high-strength spike hole 5-6. The octagonal sleeve upper connecting section 5-1 is connected and fixed with the type II anchor rod section 6 through the threads arranged on the inner wall thereof. The octagonal sleeve lower connecting section 5-3 is connected and fixed with the type I anchor rod section 4 through the threads arranged on the inner wall thereof. The intermediate spacing section 5-2 is used to separate the octagonal sleeve upper connecting section 5-1 and the octagonal sleeve lower connecting section 5-3. The intermediate spacing section 5-2 is provided with a tapered spike sliding cavity 5-4 on the upper portion thereof. The outer wall of the spike sliding cavity 5-4 is uniformly provided with high-strength spikes 5-5. Each high-strength spike hole 5-6 is arranged with one high-strength spike 5-5. The diameter of the high-strength spike 5-5 is slightly smaller than that of the high-strength spike hole 5-6, so as to slide in the spike hole. The gap between the spike hole and the high-strength spike hole 5-6 is filled with putty, so as to ensure that the high-strength spike 5-5 can keep the fixed position during the rotation and extrusion of the anchor rod, and the high-strength spike 5-5 does not contact the wall of the drilling hole, so as to prevent the spike from being damaged during the rotation.

[0046] The type II anchor rod section 6 includes a type II anchor rod body 6-2 and a tapered spike pushing rod 6-4. The type II anchor rod body 6-2 is connected with the octagonal sleeve lower connecting section 5-3 through a 6-1-II type upper end anchoring thread arranged on the upper end thereof. The type II anchor rod body 6-2 is connected with the octagonal sleeve upper connecting section 5-1 through a type II lower end anchoring thread 6-3. The tapered spike pushing rod 6-4 is arranged on the lower end of the type II anchor rod body 6-2 and matches with the spike sliding cavity 5-4, and is used to push the uniformly distributed high-strength spike holes 5-6 to slide in the spike hole. The spike is driven to penetrate into the stratum under the pressure, so as to enhance the anchoring effect of the resin anchor rod on the stratum.

[0047] The sleeve pushing 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 with the outer diameter size of the octagonal sleeve upper connecting section 5-1. The inner diameter size of the rotary joint is slightly larger than the outer diameter size of the upper connecting section, so as to drive the anchor rod body connecting sleeve 5, the type I anchor rod section 4, and the type II anchor rod section 6 when the rotary joint rotates. The octagonal rotary joint 7-5 is connected with the anchor rod drilling machine, and is used to drive the pushing rotary rod to rotate. The rotary rod connecting sleeve 7-3 is internally provided with threads on the upper and lower ends thereof, and is used to connect the rotary rod lower connecting section 7-2 and the rotary rod upper connecting section 7-4, respectively. The middle portion of the rotary rod connecting sleeve 7-3 is provided with a spacing section.

[0048] A method for installing and recycling a recyclable constant-resistance large-deformation anchor rod structure, and specific installation steps include:

[0049] S1. According to the anchoring length of the resin anchor, the anchoring section 1 is set to a length of 0.4m. The designed anchor diameter is 25mm, the drill bit diameter is 42mm, the drill hole diameter is 44mm, and the anchor depth is 3m. The drill hole diameter is 44mm. To ensure that the anchoring structure can penetrate the drill hole, the outer diameter of the anchoring section 1 is controlled to 40mm. A 48mm diameter drill bit is selected to expand the hole bottom with an expansion drill bit. The expansion depth is 0.4m, so that the anchoring section can be anchored by introducing the anchoring agent into the expanded diameter section.

[0050] S2. Drill the anchor hole and connect the I-type lower end anchoring thread 4-3 of the I-type anchor segment 4 with the anchor I-type reinforcement thread 1-3, and then connect and secure the I-type lower end anchoring thread 4-3 with the lower connection section 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 28 mm in diameter and 30 cm in length. The length of the constant resistance sliding extrusion cylinder 1-4 is 10 cm. Then, connect the anchoring segment conical head 3 with the joint connecting thread 1-2 of the anchoring segment 1 and tighten it.

[0051] S3, place the magnetic high-strength spikes 5-5 in the high-strength spike holes 5-6 in sequence, and 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 remain in a fixed position during the process of the anchor rod rotating and squeezing the anchor 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 the octagonal sleeve 7-1 to cover the outer side of the connecting section 5-1 on the octagonal sleeve, and connect the anchor drilling rig to the octagonal rotary joint 7-5;

[0052] S4. The anchor drilling rig rotates, driving the sleeve to push the rotary rod 7 and the anchor support structure, pushing the I-type anchor segment 4 and the conical constant resistance body 4-4 toward the bottom of the borehole, while squeezing the anchor agent roll 2. The anchor agent roll 2 is punctured by the anchor agent rupture spike 3-2 at the conical head 3 of the anchor segment and squeezed out through the anchor agent outlet 3-3.

[0053] 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. The packaging of the anchoring agent roll 2 is left at the conical head 3 of the anchoring section, which can prevent the resin anchoring agent from flowing back into the conical head later.

[0054] S6, the rear anchor drill rig 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, evenly extruding and distributing 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 rig is connected to the octagonal rotary joint 7-5, and the anchor drill rig 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 pushing 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. At the same time, the length of the type II anchor rod segment 6 is appropriately adjusted according to the drilling depth. Step S3 is repeated to fasten the component type II anchor rod segment 6 to the anchor rod body connecting sleeve 5 and then connect it to the anchor rod component in the drilled hole until the designed anchor rod length is met.

[0055] S7. Remove the fastening accessories on the outside of the resin anchor and use an anchor drill to remove the Type II anchor segment 6 at the outer end. Remove the external pressure of the magnetic high-strength spike 5-5, allowing it to slide freely along the puncture hole. Tap the anchor to allow the spike to gradually slide down along the puncture hole.

[0056] 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 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. Remove the anchor body connecting sleeve 5.

[0057] S9. Repeat the above step S8 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.

[0058] 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 to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention based on actual circumstances without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A recyclable constant resistance large deformation anchor rod structure, comprising an anchoring section (1), an anchoring agent roll (2), an anchoring section conical head (3) and an anchor rod, 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 thereof 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); 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); The anchor rod comprises a type I anchor rod section (4) and a type II anchor rod section (6), wherein the type I anchor rod section (4) comprises an type I anchor rod body (4-2) and a conical constant resistance body (4-4), wherein the upper end of the type I anchor rod section (4) is connected to the lower connecting section (5-3) of the octagonal sleeve via an type I upper end anchoring thread (4-1), and the lower end thereof is connected to the anchoring section (1) via an type I lower end anchoring thread (4-3) and an anchor rod type I reinforcement thread (1-3), and the lower end of the conical constant resistance body (4-4) is mounted in cooperation with the constant resistance sliding extrusion cylinder (1-4); The I-type anchor rod segment (4) and the II-type anchor rod segment (6) are connected via an anchor rod body connecting sleeve (5), and when the sleeve pushes the rotary rod (7) to rotate, the rotary joint drives the anchor rod body connecting sleeve (5), the I-type anchor rod segment (4) and the II-type 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 hole.

2. A recyclable constant resistance large deformation anchor structure according to claim 1, characterized in that: The anchoring agent roll (2) slides downward under the push of the conical constant resistance body (4-4).

3. The recyclable constant resistance large deformation anchor structure according to claim 1, characterized in that: The type II anchor rod section (6) comprises a type II anchor rod body (6-2) and a tapered 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) provided 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) provided at its lower end; the tapered spike pushing rod (6-4) is provided 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.

4. The recyclable constant resistance large deformation anchor structure according to claim 1, characterized in that: The sleeve pushing 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) 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 rig and is used to drive the pushing rotary rod to rotate. The upper and lower ends of the rotary rod connecting sleeve (7-3) are internally provided with threads, which are used to connect the rotary rod lower connecting section (7-2) and the rotary rod upper connecting section (7-4) respectively. An isolation section is provided in the middle of the rotary rod connecting sleeve (7-3).

5. A method for installing and recovering a recyclable constant resistance large deformation anchor structure according to any one of claims 1 to 4, characterized in that: The specific installation steps include: S1, using a drill bit to expand the hole bottom using a reaming drill bit; S2. Connect the I-type lower end anchoring thread (4-3) with the anchor rod I-type reinforcement thread (1-3), and connect and fix the I-type lower end anchoring thread (4-3) with the octagonal sleeve lower connecting section (5-3) in sequence, place the anchoring agent roll (2) in the anchoring agent pushing cavity (1-1), and connect and tighten the anchoring section conical head (3) with the joint connecting thread (1-2); S3, push the anchor structure in S2 along the borehole to the bottom of the borehole, use the octagonal sleeve (7-1) to cover the outer side of the connecting section (5-1) of the octagonal sleeve, and connect the anchor drilling machine to the octagonal rotary joint (7-5); S4, the anchor drilling rig 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 toward the bottom of the borehole, while squeezing the anchor agent roll (2), and the anchor agent roll (2) is punctured by the anchor agent rupture spike (3-2) at the conical head (3) of the anchor section and squeezed out through the anchor 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 end 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 rig reverses the drilling, retracts the conical constant resistance body (4-4) to the constant resistance sliding extrusion cylinder (1-4), and drives the anchoring structure to rotate, evenly extruding and distributing the anchoring agent around the anchoring structure. After the anchoring agent is anchored, the type II anchor section (6) is fastened to the upper connecting section (5-1) of the octagonal sleeve, and the fastener is pushed into the anchor hole through the sleeve push rod (7). The anchor drill rig is used to screw the fastener into the lower connecting section (5-3) of the octagonal sleeve; 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. The external pressure of the magnetic high-strength spike (5-5) is released, and it can slide freely along the puncture hole. Knock the anchor to allow the spike to gradually slide along the puncture hole. S8. Use the octagonal sleeve (7-1) to cover the outer side of the upper connecting section of the octagonal sleeve (5-1), connect the anchor drill to 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 anchor body connecting sleeve (5); S9. Repeat the above step S8 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.

6. The method for installing and recovering a recyclable constant resistance large deformation anchor structure according to claim 5, characterized in that: In step S6, during the process of screwing the fasteners of the II 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 pushing rod (6-4) pushes the magnetic high-strength spike (5-5) to slide into the hole, and the magnetic high-strength spike (5-5) slides to the hole wall and is pressed into the ground under the pressure of the push rod.

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