High-pressure resistant recyclable anchor rod and construction method thereof

Abstract

The present invention relates to a high-pressure resistant recyclable anchor rod, including an anchor, a sealing cover connected to the anchor, a sleeve connected to the anchor, a tendon body inserted in the sleeve and extending into the sealing cover, and a conical clip for clamping the tendon body. The anchor is provided with a conical hole matched with the conical clip, and a release plate with the conical clip sleeved thereon is provided in the sealing cover. The release plate can push the conical clip to move axially away from the anchor, and also includes a top plate mechanism for pushing the release plate to move axially. The top plate mechanism is connected to the release plate, and the top plate mechanism passes through the anchor and extends outside the anchor. After adopting the technical solution of the present invention, the release plate is pushed by the top plate mechanism, and the conical clip fastening the anchor rod tendon body is pushed out by the release plate, so that the conical clip is separated from the conical hole of the anchor cup, and the tendon body is unlocked. The present invention has the characteristics of reliable device and simple structure. The construction method of the present invention has the characteristics of reliable device and fast construction.

Description

Technical Field

[0001] The invention relates to a high-pressure resistant recyclable anchor rod and a construction method thereof, belonging to the technical field of building construction. Background Art

[0002] Anchor rods are widely used in foundation pit support projects. With the acceleration of urban construction, the environment faced by foundation pits of new buildings is becoming more and more complex, such as being close to existing buildings, subway lines to be built in the surrounding area, and foundation pit excavation lines close to building red lines. As a result, traditional anchor rods cannot be normally constructed within the building red line, or the reinforcement cannot be removed after construction, resulting in serious obstruction of subsequent subway excavation. Therefore, the development of recyclable anchor rods that can recycle the reinforcement can not only provide sufficient pull-out resistance during foundation pit support to ensure project safety, but also remove and recycle the anchor rod reinforcement after the support project is completed, which will not affect the normal construction of subsequent underground space, and can also greatly save project costs and shorten construction period.

[0003] At present, recyclable anchor rods mainly use mechanical and hot-melt methods to achieve tendon extraction and recovery. However, the mechanical method requires manual unlocking. When the tendon is long, it is difficult to recover it due to the squeezing of the tendon by the grouting body, and it is impossible to improve the pull-out bearing capacity of the anchor rod through high-pressure grouting. The hot-melt method relies on the power supply of the wire placed in the casing together with the tendon to melt and unlock the clamp to achieve recovery. However, during the tendon tensioning process, due to the difference between the elastic elongation of the tendon and the elongation of the wire, it is easy to cause the wire to break during the tendon tensioning process, making it impossible to melt the clamp and recover it.

[0004] In view of this, the inventor of this case conducted in-depth research on the above-mentioned issues, which led to the emergence of this case. Summary of the invention

[0005] The purpose of the present invention is to provide a recyclable anchor rod with a simple and reliable structure, applicable to normal pressure and high pressure grouting environments, and with ultra-long tendons. Another purpose of the present invention is to propose a construction method for the anchor rod, which has the advantages of quick construction and easy operation.

[0006] In order to achieve the above object, the present invention adopts such technical solution:

[0007] A high-pressure resistant recyclable anchor rod comprises an anchor, a sealing cover connected to the anchor, a sleeve connected to the anchor, a tendon inserted in the sleeve and extending into the sealing cover, and a conical clip for clamping the tendon. A conical hole cooperating with the conical clip is provided on the anchor, and an anchor release plate with the conical clip sleeve is provided in the sealing cover. The anchor release plate can push the conical clip to move axially away from the anchor, and also comprises a top plate mechanism for pushing the anchor release plate to move axially, the top plate mechanism is connected to the anchor release plate, and the top plate mechanism passes through the anchor and extends outside the anchor.

[0008] As a preferred embodiment of the present invention, the top plate mechanism includes a pressure tube and a movable piston rod arranged in the pressure tube, the piston rod extends out of the pressure tube and is connected to the anchor release plate, and the pressure tube is connected to the anchor.

[0009] As a preferred embodiment of the present invention, the anchor release plate is provided with a connecting rod groove and an anchor release hole, the connecting rod groove is arranged at the center of the anchor release plate, the piston rod includes a cylindrical end and a T-shaped end, the cylindrical end is provided with a connecting groove thread, the T-shaped end is covered with a rubber ring, and the connecting groove thread is matched with the connecting rod groove.

[0010] As a preferred embodiment of the present invention, the pressure tube includes a first pressure tube and a second pressure tube, the first pressure tube is fixed to the anchor by a first external thread, the piston rod is arranged in the first pressure tube, and a limiting cap is provided at one end of the first pressure tube close to the anchor release plate, and the other end of the first pressure tube is connected to the second pressure tube by a second external thread.

[0011] As a preferred embodiment of the present invention, the anchor includes an anchor cup and a pressure plate, the conical hole is arranged in the anchor cup, a rib-piercing hole is also arranged in the anchor cup, a first internal thread is arranged in the rib-piercing hole, a through-cavity hole, a second internal thread and a third external thread are arranged on the pressure plate, the second internal thread is arranged on the inner wall of the through-cavity hole, the second internal thread is matched with the first external thread of the first pressure pipe, and the first internal thread is connected to the casing.

[0012] As a preferred embodiment of the present invention, the sealing cover comprises a cone head, a partition and a cylindrical wall, the inner side of the cylindrical wall is provided with a third internal thread, and the third internal thread is matched with the third external thread of the anchor.

[0013] As a preferred embodiment of the present invention, the conical clip includes a plurality of movable clips, which are bundled together by open elastic steel bars, and the movable clip includes a brim, a straight wall, a conical wall, an inner tooth pattern arranged on the inner side of the conical wall, a fastening groove arranged on the outer wall of the straight wall and a convex ring arranged on the brim, the conical wall is matched with the conical hole of the anchor, and a spring is arranged in the convex ring, one end of the spring abuts against the brim, and the other end abuts against the partition.

[0014] As a preferred embodiment of the present invention, the inner diameter of the anchor release hole is 10-20mm larger than the outer diameter of the straight wall after the conical clip pre-tightens the tendon body, and the inner diameter of the anchor release hole is 10-20mm smaller than the outer diameter of the brim after the conical clip pre-tightens the tendon body. After the conical clip pre-tightens the tendon body, the outer diameter of the spring is 6-15mm smaller than the inner diameter of the convex ring, and the outer diameter of the spring is 6-10mm larger than the outer diameter of the tendon body.

[0015] As a preferred embodiment of the present invention, the conical wall of the conical clip and the hole wall of the conical hole on the anchor cup are coated with lubricating grease or padded with a conical plastic sleeve having the same shape as the conical hole before installation.

[0016] The present invention also provides a construction method for a high pressure resistant recyclable anchor rod, comprising the following steps:

[0017] A. Anchor release device installation

[0018] The first pressure tube is fixed to the anchor by screwing the first external thread of the first pressure tube with the second internal thread of the through-cavity hole, and the limiting cap and the anchor cup are on the same side; the rubber ring is sleeved on the T-shaped end of the piston rod, and the cylindrical end of the piston rod is aligned with the first pressure tube, pushed into the first pressure tube, and the cylindrical end is extended out of the limiting cap; the connecting rod groove of the anchor release plate is screwed to the cylindrical end of the piston rod; the anchor release plate is rotated so that the anchor release hole of the anchor release plate corresponds to the rib-piercing hole of the anchor, and the anchor release plate is pressed against the anchor cup; the second pressure tube is screwed to the second external thread of the first pressure tube;

[0019] B. Reinforcement Installation

[0020] Insert the reinforcement body through the reinforcement hole of the pressure plate and pass it out of the anchor cup; insert multiple conical clips wrapped with open elastic steel bars into the reinforcement body, pass through the anchor release hole of the anchor release plate, and push the conical wall top of the conical clip into the conical hole of the anchor cup; adjust the length of the brim of the reinforcement body exposed from the conical clip; screw the sleeve onto the first internal thread of the pressure plate;

[0021] C. Sealing cover installation

[0022] The spring is inserted into the rib body exposed from the brim, and the spring is positioned in the convex ring of the conical clip, the sealing cover is inserted into the anchor, the third internal thread of the sealing cover and the third external thread of the anchor are screwed together, the sealing cover is fixed to the anchor, and the partition of the sealing cover is lightly pressed against the spring, thus completing the assembly of the recyclable anchor rod;

[0023] D. Anchor tensioning

[0024] The recyclable anchor rod is constructed into the borehole according to the design requirements and grouting is completed. When the tendon is tensioned, the tendon pulls the conical clip by the friction between the tendon and the inner tooth pattern, so that the conical clip fastens the tendon in the conical hole, and the grouting body in the borehole is squeezed by the anchor to provide pull-out resistance;

[0025] E. Anchor recovery

[0026] After the use of the anchor rod is over, the external anchor is removed first to complete the unloading. At this time, the tendon is in a relaxed state, and high-pressure air or high-pressure water is injected into the second pressure pipe through an external device to push the piston rod in the first pressure pipe to move upward, thereby causing the anchor release plate to move upward and push the conical clip to disengage the conical hole and separate from the tendon. The tendon is then pulled out until it is completely pulled out of the formation, thereby realizing the recovery of the tendon.

[0027] After adopting the technical solution of the present invention, the anchor release plate is pushed by the top plate mechanism, and the conical clip fastening the anchor rod tendon body is pushed out by the anchor release plate, so that the conical clip is separated from the conical hole of the anchor cup, and the tendon body is unlocked. The present invention has the characteristics of reliable device and simple structure; in addition, since the anchor release plate of the present invention is separated from the tendon body, it is not affected by the anchor rod construction length and the tensile elongation deformation of the tendon body; and the anchor release plate of the present invention is completely sealed in the sealing cover, which can adapt to the environment of high-pressure grouting. In the construction method of the present invention, by injecting high-pressure gas or high-pressure water into the pressure pipe, the piston rod in the first pressure pipe connected to the high-pressure pipe is pushed upward, and the conical clip fastening the anchor rod tendon body is pushed out by the anchor release plate, so that the conical clip is separated from the conical hole of the anchor cup, and the tendon body is unlocked. Since there is a gap between the anchor release hole of the anchor release plate and the clip, the tendon body can be pulled under the action of external force to automatically disengage the conical clip from the tendon body, so that the tendon body can be smoothly pulled out to achieve the purpose of recovery. Since the present invention uses high-pressure gas or high-pressure water to unlock the anchor rod, it has the characteristics of reliable device and fast construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the completed assembly of the present invention.

[0029] Figure 2 It is a cross-sectional view of the unlocking device in the present invention.

[0030] Figure 3 This is the outline diagram of the anchor plate according to the present invention.

[0031] Figure 4 This is a cross-sectional view of the anchor plate according to the present invention.

[0032] Figure 5 It is the appearance diagram of the piston rod of the present invention.

[0033] Figure 6 It is the appearance diagram of the rubber ring of the present invention.

[0034] Figure 7 This is the appearance diagram of the first pressure tube of the present invention.

[0035] Figure 8 This is a cross-sectional view of the first pressure tube of the present invention.

[0036] Fig. 9 It is the appearance diagram of the anchor of the present invention.

[0037] Fig.10 For the present invention Fig. 9 Cross-sectional view at AA.

[0038] Fig.11 It is an elevation view of the inner side of the conical clip of the present invention.

[0039] Fig.12 It is an outer side elevation view of the conical clip of the present invention.

[0040] Fig.13 It is a top view of the conical clip clamping the reinforcement body of the present invention.

[0041] Fig.14 It is a top view of the open elastic steel bar of the present invention.

[0042] Fig.15 It is a cross-sectional view of the sealing cover of the present invention.

[0043] Fig.16 For the present invention Fig.15 Cross-sectional view at BB.

[0044] Fig.17 For the present invention Fig.15 Cross-sectional view at CC.

[0045] Fig.18 For the present invention Fig.15 Cross-sectional view at DD.

[0046] Fig.19 For the present invention Fig.15 Cross-sectional view at EE.

[0047] Fig. 20 This is the appearance diagram of the anchorage using three tendons in the present invention.

[0048] Fig.21 This is the appearance diagram of the anchor plate for recovering three tendons in the present invention.

[0049] Fig. 22 This is the appearance diagram of the anchorage using four tendons in the present invention.

[0050] Fig.23 This is the appearance diagram of the anchor plate for recovering four tendons in the present invention.

[0051] In the figure:

[0052] 1 Unlocking device 11 Unlocking anchor plate

[0053] 111 anchor hole 112 connecting rod slot

[0054] 12 piston rod 121 cylindrical end

[0055] 122T-end 123 continuous groove thread

[0056] 124 rubber ring 13 first pressure tube

[0057] 131 first external thread 132 second external thread

[0058] 133 limit cap 14 second pressure pipe

[0059] 15 Pressure pipe

[0060] 2 anchors 21 anchor cups

[0061] 211 tapered hole 212 rib hole

[0062] 213 first internal thread 22 pressure plate

[0063] 221 through hole 222 second internal thread

[0064] 223 third external thread

[0065] 3 cone-shaped clips 30 movable clips

[0066] 31 brim 32 straight wall

[0067] 33 tapered wall 34 inner tooth pattern

[0068] 35 fastening groove 36 convex ring

[0069] 37 Open elastic steel bars

[0070] 4 Sealing cover 41 cone head

[0071] 42 partition 43 cylinder wall

[0072] 431 third internal thread

[0073] 5 Spring

[0074] 6 Casing

[0075] 7 muscles DETAILED DESCRIPTION

[0076] In order to further explain the technical solution of the present invention, the following is a detailed description in conjunction with the embodiments. Figure 1-Figure 23 The high-pressure resistant recyclable anchor rod body comprises an unlocking device 1, an anchor 2, a conical clip 3, a sealing cover 4, a spring 5, a sleeve 6 and a tendon 7.

[0077] The unlocking device 1 includes an anchor release plate 11, a piston rod 12 and a pressure tube 15, wherein the piston rod 12 and the pressure tube 15 constitute a top plate mechanism for resisting the anchor release plate 11. The pressure tube 15 includes a first pressure tube 13 and a second pressure tube 14. An anchor release hole 111 is provided in the ring on the anchor release plate 11, and a connecting rod groove 112 is provided in the center of the anchor release plate 11. The piston rod 12 consists of a cylindrical end 121 and a T-shaped end 122, wherein the cylindrical end 121 is provided with a connecting groove thread 123, and the T-shaped end 122 is covered with a rubber ring 124, wherein the connecting groove thread 123 is used in conjunction with the connecting rod groove 112 on the anchor release plate 11, and the T-shaped end 122 is placed in the first pressure tube 13. The first pressure tube 13 is fixed to the anchor 2 via a first external thread 131 on the upper portion, a limiting cap 133 is provided at one axial end of the first pressure tube 13 , and a second external thread 132 is provided at the other axial end of the first pressure tube 13 , and the second external thread 132 is connected to the second pressure tube 14 .

[0078] The anchor 2 is composed of an anchor cup 21 and a pressure plate 22, and the anchor cup 21 and the pressure plate 22 are integrally formed. The anchor cup 21 is provided with a tapered hole 211 and a rib hole 212, and the rib hole 212 is provided with a first internal thread 213. The pressure plate 22 is provided with a cavity hole 221, a second internal thread 222 and a third external thread 223, and the second internal thread 222 is provided on the inner wall of the cavity hole 221, and the second internal thread 222 is matched with the first external thread 131 of the first pressure pipe 13, and the first internal thread 213 is connected to the sleeve 6.

[0079] The sealing cover 4 is composed of a cone head 41, a partition 42 and a cylindrical wall 43. The partition 42 is arranged in the cylindrical arm 43. The inner side of the cylindrical wall 43 is provided with a third internal thread 431, and the third internal thread 431 cooperates with the third external thread 223 of the anchor 2.

[0080] The conical clip 3 includes a plurality of movable clips 30, on which a brim 31, a straight wall 32, a conical wall 33, an inner tooth pattern 34, a fastening groove 35 and a convex ring 36 are provided. The straight wall 32 is arranged between the brim 31 and the conical wall 33, the fastening groove 35 is arranged on the straight wall 32, the inner tooth pattern 34 is arranged on the inner wall of the movable clip 30, the conical wall 33 cooperates with the conical hole 211 of the anchor 3, and the inner diameter of the convex ring 36 is slightly larger than the outer diameter of the spring 5.

[0081] Preferably, the conical wall 33 of the conical clip 3 and the wall of the conical hole 211 on the anchor cup 21 are coated with lubricating grease or padded with a conical plastic sleeve of the same shape as the conical hole 211 before installation, so that the conical clip 3 can be easily separated from the conical hole 211 during the unlocking process.

[0082] Preferably, after the conical clip 3 pre-tightens the tendon 7 and the sealing cover 4 is screwed onto the anchor 2, the spring 5 lightly presses against the partition 42 of the sealing cover 4, the spring 5 is compressed by 2-10 mm, and the length of the spring 5 is 50-100 mm.

[0083] Preferably, the inner diameter of the anchor release hole 111 is 10-20 mm larger than the outer diameter of the straight wall 32 after the conical clip 3 pre-tightens the tendon 7, and the inner diameter of the anchor release hole 111 is 10-20 mm smaller than the outer diameter of the brim 31 after the conical clip 3 pre-tightens the tendon 7.

[0084] Preferably, after the conical clip 31 pre-tightens the tendon 7 , the outer diameter of the spring 5 is 6-15 mm smaller than the inner diameter of the convex ring 37 , and the outer diameter of the spring 5 is 6-10 mm larger than the outer diameter of the tendon 7 .

[0085] The construction method of the high pressure resistant recyclable anchor rod comprises the following steps:

[0086] A. Installation of anchor release device

[0087] The first pressure tube 13 is fixed to the anchor 2 by screwing the first external thread 131 of the first pressure tube 13 with the second internal thread 222 of the through-hole 221, and the limiting cap 133 and the anchor cup 21 are on the same side; the rubber ring 124 is sleeved on the T-shaped end 122 of the piston rod 12, and then the cylindrical end 121 of the piston rod 12 is aligned with the first pressure tube 13, pushed into the first pressure tube 13, and the cylindrical end 121 is extended out of the limiting cap 133; the connecting rod groove 112 of the anchor release plate 111 is screwed to the cylindrical end 121 of the piston rod 12; the anchor release plate 11 is rotated so that the anchor release hole 111 of the anchor release plate 11 corresponds to the rib through-hole 212 of the anchor 2, and the anchor release plate 11 is pressed against the anchor cup 21; the second pressure tube 14 is screwed to the second external thread 132 of the first pressure tube 13;

[0088] B. Reinforcement Installation

[0089] The reinforcement body 7 is passed through the reinforcement hole 212 of the pressure plate 22 and passed through the anchor cup 21; a plurality of movable clips 30 bundled with open elastic steel bars 36 are formed into a conical clip 3, the conical clip 3 is inserted into the reinforcement body 7, passed through the anchor release hole 111 of the anchor release plate 11, and the conical wall 33 of the conical clip 3 is pushed into the conical hole 212 of the anchor cup 21; the length of the brim 31 of the reinforcement body 7 exposed from the conical clip 3 is adjusted; the sleeve 6 is screwed onto the first internal thread 213 of the pressure plate 22;

[0090] C. Sealing cover installation

[0091] The spring 5 is inserted into the rib 7 where the brim 31 is exposed, and the spring 5 is positioned in the convex ring 37 of the conical clip 3, and the sealing cover 4 is inserted into the anchor 2, and the third internal thread 431 of the sealing cover 4 and the third external thread 223 of the anchor 2 are screwed together to fix the sealing cover 4 on the anchor 2, and the partition 42 of the sealing cover 4 is lightly pressed against the spring 5, so that the assembly of the recyclable anchor is completed;

[0092] D. Anchor tensioning

[0093] The recyclable anchor rod is constructed into the borehole according to the design requirements and grouting is completed. When the tendon 7 is tensioned, the tendon 7 pulls the conical clip 3 by the friction between the tendon 7 and the inner tooth pattern 34, so that the conical clip 3 fastens the tendon 7 in the conical hole 211, and the anchor 2 squeezes the grouting in the borehole to provide pull-out resistance;

[0094] E. Anchor recovery

[0095] After the use of the anchor rod is over, the external anchor (not shown in the figure) is removed first to complete the unloading. At this time, the tendon 7 is in a relaxed state, and high-pressure air or high-pressure water is injected into the second pressure tube 14 through an external device to push the piston rod 12 in the first pressure tube 13 to move upward. Since the anchor release plate 11 is threadedly connected to the piston rod 12, the anchor release plate 11 moves further upward, pushing the conical clip 3 upward, thereby causing the conical clip 3 to detach from the conical hole 211 and separate from the tendon 7, and then the tendon 7 is pulled out until it is completely pulled out of the formation, thereby realizing the recovery of the tendon 7.

[0096] The high-pressure resistant recyclable anchor rod and its construction method of the present invention utilize high-pressure gas or high-pressure water to be injected into the pressure tube 15, so that the piston rod 12 in the first pressure tube 13 connected to the high-pressure tube is pushed upward, and the conical clip 3 fastening the anchor rod tendon body is pushed out by the anchor release plate 11, so that the conical clip 3 is separated from the conical hole 211 of the anchor cup 21, and the tendon body 7 is unlocked. Since there is a gap between the anchor release hole 111 of the anchor release plate 11 and the conical clip 3, the tendon body 7 can be pulled under the action of external force to automatically disengage the conical clip 3 from the tendon body 7, so that the tendon body 7 can be smoothly pulled out to achieve the purpose of recovery. Since the present invention uses high-pressure gas or high-pressure water to unlock the anchor rod, it has the characteristics of reliable device and fast construction; in addition, since the unlocking device 1 of the present invention is separated from the tendon body 7, it is not affected by the construction length of the anchor rod and the tension and elongation deformation of the tendon body 7; and the anchor release device 1 of the present invention is completely sealed in the sealing cover 4, which can adapt to the environment of high-pressure grouting.

[0097] The product form of the present invention is not limited to the embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the present invention.

Claims

1. High-pressure resistant recyclable anchor, characterized by: The anchor comprises an anchor, a sealing cover connected to the anchor, a sleeve connected to the anchor, a tendon inserted in the sleeve and extending into the sealing cover, and a conical clip for clamping the tendon, a conical hole matched with the conical clip is provided on the anchor, an anchor release plate sleeved with the conical clip is provided in the sealing cover, the anchor release plate can push the conical clip to move axially in a direction away from the anchor, and also comprises a top plate mechanism for pushing the anchor release plate to move axially, the top plate mechanism is connected to the anchor release plate, and the top plate mechanism passes through the anchor and extends outside the anchor; The top plate mechanism comprises a pressure tube and a piston rod movable in the pressure tube, the piston rod extends out of the pressure tube and is connected to the anchor release plate, and the pressure tube is connected to the anchor; The anchor release plate is provided with a connecting rod groove and an anchor release hole, the connecting rod groove is arranged at the center of the anchor release plate, the piston rod includes a cylindrical end and a T-shaped end, the cylindrical end is provided with a connecting groove thread, the T-shaped end is covered with a rubber ring, and the connecting groove thread is matched with the connecting rod groove; the conical clamp includes a plurality of movable clamps, and the movable clamp includes a straight wall, and the inner diameter of the anchor release hole is 10-20mm larger than the outer diameter of the straight wall after the conical clamp pre-tightens the tendon.

2. The high pressure resistant recyclable anchor rod according to claim 1, characterized in that: The pressure tube includes a first pressure tube and a second pressure tube. The first pressure tube is fixed to the anchor via a first external thread. The piston rod is arranged in the first pressure tube. A limiting cap is provided at one end of the first pressure tube close to the anchor release plate. The other end of the first pressure tube is connected to the second pressure tube via a second external thread.

3. The high pressure resistant recyclable anchor rod as claimed in claim 2, characterized in that: The anchor includes an anchor cup and a pressure plate, the conical hole is arranged in the anchor cup, a rib-piercing hole is also arranged in the anchor cup, a first internal thread is arranged in the rib-piercing hole, a through-cavity hole, a second internal thread and a third external thread are arranged on the pressure plate, the second internal thread is arranged on the inner wall of the through-cavity hole, the second internal thread is matched with the first external thread of the first pressure pipe, and the first internal thread is connected to the casing.

4. The high pressure resistant recyclable anchor rod as claimed in claim 3, characterized in that: The sealing cover comprises a cone head, a partition and a cylindrical wall. The inner side of the cylindrical wall is provided with a third internal thread, and the third internal thread is matched with the third external thread of the anchor.

5. The high pressure resistant recyclable anchor rod as claimed in claim 4, characterized in that: A plurality of movable clips are bundled together by open elastic steel bars, and the movable clips also include a brim, a conical wall, an inner tooth pattern arranged on the inner side of the conical wall, a fastening groove arranged on the outer wall of the straight wall, and a convex ring arranged on the brim. The conical wall is matched with the conical hole of the anchor, and a spring is arranged in the convex ring, one end of the spring abuts against the brim, and the other end abuts against the partition.

6. The high pressure resistant recyclable anchor rod as claimed in claim 5, characterized in that: The conical wall of the conical clip and the hole wall of the conical hole on the anchor cup are coated with lubricating grease or padded with a conical plastic sleeve having the same shape as the conical hole before installation.

7. The construction method of the high pressure resistant recyclable anchor rod according to claim 6, characterized in that: The steps include: A. Installation of anchor release device The first pressure tube is fixed to the anchor by screwing the first external thread of the first pressure tube with the second internal thread of the through-cavity hole, and the limiting cap and the anchor cup are on the same side; the rubber ring is sleeved on the T-shaped end of the piston rod, and the cylindrical end of the piston rod is aligned with the first pressure tube, pushed into the first pressure tube, and the cylindrical end is extended out of the limiting cap; the connecting rod groove of the anchor release plate is screwed to the cylindrical end of the piston rod; the anchor release plate is rotated so that the anchor release hole of the anchor release plate corresponds to the rib-piercing hole of the anchor, and the anchor release plate is pressed against the anchor cup; the second pressure tube is screwed to the second external thread of the first pressure tube; B. Reinforcement Installation Insert the reinforcement body through the reinforcement hole of the pressure plate and pass it out of the anchor cup; insert multiple conical clips wrapped with open elastic steel bars into the reinforcement body, pass through the anchor release hole of the anchor release plate, and push the conical wall top of the conical clip into the conical hole of the anchor cup; adjust the length of the brim of the reinforcement body exposed from the conical clip; screw the sleeve onto the first internal thread of the pressure plate; C. Sealing cover installation The spring is inserted into the rib body exposed from the brim, and the spring is positioned in the convex ring of the conical clip, the sealing cover is inserted into the anchor, the third internal thread of the sealing cover and the third external thread of the anchor are screwed together, the sealing cover is fixed to the anchor, and the partition of the sealing cover is lightly pressed against the spring, thus completing the assembly of the recyclable anchor rod; D. Anchor tensioning The recyclable anchor rod is constructed into the borehole according to the design requirements and grouting is completed. When the tendon is tensioned, the tendon pulls the conical clip by the friction between the tendon and the inner tooth pattern, so that the conical clip fastens the tendon in the conical hole, and the grouting body in the borehole is squeezed by the anchor to provide pull-out resistance; E. Anchor recovery After the use of the anchor rod is over, the external anchor is removed first to complete the unloading. At this time, the tendon is in a relaxed state, and high-pressure air or high-pressure water is injected into the second pressure pipe through an external device to push the piston rod in the first pressure pipe to move upward, thereby causing the anchor release plate to move upward and push the conical clip to disengage the conical hole and separate from the tendon. The tendon is then pulled out until it is completely pulled out of the formation, thereby realizing the recovery of the tendon.

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