Anchor rod device and support method suitable for fault anchoring

Abstract

The present invention provides an anchor device and a support method suitable for fault anchoring, and relates to the technical field of rock and soil anchoring. The anchor device suitable for fault anchoring makes the outer sleeve correspond to the position of the fault in the anchor drilling hole. When the fault dislocation occurs, the lower anchor rod moves displacedly relative to the upper anchor rod, and the outer sleeve bends at the position of the strand cavity. At the same time, the second steel strand connection plate moves away from the first steel strand connection plate, and part or all of the steel strands change from a relaxed state to a tensioned state. After the steel strands are tensioned, they are stressed to strengthen the connection strength between the upper anchor rod and the lower anchor rod. The second steel strand connection plate moves along the axial direction of the pressure cylinder, and the pressure plate is squeezed and deformed to achieve pressure buffering. As the steel strand is continuously tensioned and the pressure plate is continuously squeezed and deformed, the steel strand and the pressure plate finally reach a static equilibrium state. In this way, the anchor device can bear part of the shear stress and instantaneous large axial stress generated by the fault dislocation at the fault position.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil anchoring, and in particular to an anchor rod device and a supporting method suitable for fault anchoring. Background Art

[0002] With the continuous development of my country's economy and technology, in recent years, my country has started to start some major infrastructure construction projects that were not constructed before due to various reasons. In the process of continuous advancement of major infrastructure construction, projects with deep burial depth, many faults and complex geological conditions are constantly encountered. Among them, faults are one of the more common problems we encounter, and support at the fault is even more important. Anchor support is often used in engineering to reinforce the interior of the surrounding rock. The support quality of the anchor is directly related to the safety of the project. Anchor support mainly bears axial stress, but after support, if the fault dislocation develops along the radial direction of the anchor, due to the low shear strength of the anchor, the anchor will be sheared off, the support will be damaged, and in serious cases, it will endanger the safety of the overall structure. In addition, when the fault dislocation occurs, it will also produce instantaneous large axial stress on the anchor, and the anchor is also at risk of being pulled off. At this stage, some projects are timely grouting and anchoring the rock and soil body and burying devices at the secondary lining to offset the shear deformation after encountering fault dislocation, so as to offset the impact of fault dislocation. The construction work is carried out by grouting anchors and burying devices in the secondary lining to offset the shear deformation, which increases the workload of the project, is time-consuming and labor-intensive, and the recovery effect is not ideal. Summary of the invention

[0003] The object of the present invention is to provide an anchor device suitable for fault anchoring and a support method suitable for fault anchoring, so that the anchor device can bear part of the shear stress and instantaneous large axial stress generated by fault dislocation at the fault position.

[0004] In order to achieve the above object, the technical solutions adopted by the present invention are as follows:

[0005] An anchor rod device suitable for fault anchoring, comprising an outer sleeve, a first steel strand connection plate, a second steel strand connection plate, a pressure cylinder, an upper anchor rod, a lower anchor rod and steel strands;

[0006] The interior of the outer sleeve is provided with an anchor rod cavity, a first connection plate assembly cavity, a stranded wire cavity, a second connection plate assembly cavity and a pressure relief cavity which are connected in sequence from top to bottom. The upper end of the anchor rod cavity is exposed from the upper end surface of the outer sleeve, and the lower end of the pressure relief cavity is exposed from the lower end surface of the outer sleeve. The circumferential inner wall of the first connection plate assembly cavity is set as a first threaded hole, a limited position step is set between the second connection plate assembly cavity and the stranded wire cavity, and the circumferential inner wall of the pressure relief cavity is set as a second threaded hole.

[0007] The circumferential outer wall of the first steel strand connection disk is provided with a first external thread matching the first threaded hole, and a third threaded hole is provided in the middle of the first steel strand connection disk;

[0008] A fourth threaded hole is provided in the middle of the second steel strand connection plate;

[0009] The circumferential outer wall of the pressure-releasing cylinder is provided with a second external thread matching the second threaded hole, the inner wall of the pressure-releasing cylinder is provided with a plurality of annular pressure-releasing sheets, and the middle position of the pressure-releasing sheets is provided with a through hole;

[0010] The circumferential outer wall of the lower end of the upper anchor rod is provided with a third external thread matching the third threaded hole;

[0011] The circumferential outer wall of the upper end of the lower anchor rod is provided with a fourth external thread matching the fourth threaded hole;

[0012] The first steel strand connection plate is threadedly connected to the first connection plate assembly cavity, the upper anchor rod passes through the anchor rod cavity, and the lower end of the upper anchor rod is threadedly connected to the third threaded hole;

[0013] The second steel strand connection disk is placed in the second connection disk assembly cavity, the upper edge of the second steel strand connection disk overlaps the limit step, the lower anchor rod passes through the pressure relief cavity, and the upper end of the lower anchor rod is threadedly connected to the fourth threaded hole;

[0014] A plurality of steel strands are connected between the first steel strand connection disk and the second steel strand connection disk, and when the edge of the second steel strand connection disk overlaps the limiting step, the steel strands are in a relaxed state;

[0015] The pressure-releasing cylinder is threadedly connected to the pressure-releasing cavity, the lower anchor rod passes through the through hole in the middle of the pressure-releasing plate, and the uppermost pressure-releasing plate overlaps the lower edge of the second steel strand connecting disk.

[0016] Preferably, the outer sleeve includes a left half sleeve and a right half sleeve with a semi-cylindrical outer contour, the left half sleeve and the right half sleeve are assembled and connected as a whole, and one of the left half sleeve and the right half sleeve is provided with an internal thread on the inner wall of the first connecting plate assembly cavity.

[0017] Preferably, the left half sleeve and the right half sleeve are connected as one body via a clamp assembly.

[0018] Preferably, an assembly groove is provided at the matching position between the left half sleeve, the right half sleeve and the clamp, and the clamp is located in the assembly groove.

[0019] Preferably, the first steel strand connecting disk has a first wire hole opened in the axial direction, and a first recessed groove is opened on the upper end surface of the first steel strand connecting disk at the edge of the first wire hole, the upper end of the steel strand passes through the first wire hole, and the upper end of the steel strand is equipped with a first limit block, and the first limit block is located in the first recessed groove; the second steel strand connecting disk has a second wire hole opened in the axial direction, and a second recessed groove is opened on the lower end surface of the second steel strand connecting disk at the edge of the second wire hole, the lower end of the steel strand passes through the second wire hole, and the lower end of the steel strand is equipped with a second limit block, and the second limit block is located in the second recessed groove.

[0020] Preferably, a plurality of pressing plates are arranged at set intervals along the axial direction of the pressing cylinder.

[0021] Preferably, along the axial direction of the pressing cylinder from top to bottom, the thicknesses of the plurality of pressed sheets increase sequentially.

[0022] A support method suitable for fault anchoring, using the above-mentioned anchor device suitable for fault anchoring;

[0023] The method is as follows:

[0024] Step 1: Drill a hole into the surrounding rock to form an anchor hole and determine the position of the fault layer in the anchor hole, and set the length of the upper anchor and the lower anchor according to the depth of the anchor hole and the position of the fault layer in the anchor hole;

[0025] First, the upper end of the steel strand is connected to the first steel strand connection disk, the first steel strand connection disk is connected to the first connection disk assembly cavity, the upper anchor rod is passed through the anchor rod cavity, and the lower end of the upper anchor rod is connected to the third threaded hole of the first steel strand connection disk;

[0026] Then connect the lower end of the steel strand to the second steel strand connection disk, place the second steel strand connection disk in the second connection disk assembly cavity, overlap the upper end edge of the second steel strand connection disk on the limiting step, so that the steel strand is in a relaxed state, pass the lower anchor rod through the pressure relief cavity, and connect the upper end of the lower anchor rod to the fourth threaded hole of the second steel strand connection disk;

[0027] Finally, the pressure-releasing cylinder is threadedly connected to the pressure-releasing cavity, the lower anchor rod passes through the through hole in the middle of the pressure-releasing plate, and the uppermost pressure-releasing plate overlaps the lower edge of the second steel strand connection plate;

[0028] Step 2: Put the anchoring agent into the anchor hole, place the anchor device suitable for fault anchoring in the anchor hole, the lower anchor is located inside the anchor hole, and the upper anchor is located outside the anchor hole, so that the outer sleeve corresponds to the position of the fault in the anchor hole, the anchor device suitable for fault anchoring is anchored to the surrounding rock through the anchoring agent, and the outer end of the upper anchor is fixed to the outer wall of the surrounding rock through the anchor assembly;

[0029] Step 3. When fault movement occurs, the lower anchor rod moves relative to the upper anchor rod, and the outer sleeve bends. At the same time, the second steel strand connection disk moves away from the first steel strand connection disk, and some or all of the steel strands change from a relaxed state to a tensioned state. The second steel strand connection disk moves along the axial direction of the pressure cylinder, so that the pressure plate is squeezed and deformed, and finally the steel strands and the pressure plate reach a static equilibrium state.

[0030] The beneficial technical effects of the present invention are:

[0031] The anchor device and support method suitable for fault anchoring of the present invention make the outer sleeve correspond to the position of the fault in the anchor borehole. During normal support, the entire device is connected as an integrated structure to withstand axial stress and achieve support for the surrounding rock. When fault dislocation occurs, the lower anchor moves relative to the upper anchor, and the outer sleeve is a hollow structure at the strand cavity position so that the outer sleeve bends at the strand cavity position. At the same time, the second steel strand connection disk is away from the first steel strand connection disk, and part or all of the steel strands are changed from a relaxed state to a tensioned state. After the steel strands are tensioned, they are stressed to strengthen the connection strength between the upper anchor and the lower anchor. The second steel strand connection disk moves along the axial direction of the pressure cylinder, so that the pressure plate is squeezed and deformed to achieve pressure buffering. As the steel strands are continuously tensioned and the pressure plate is continuously squeezed and deformed, the steel strands and the pressure plate eventually reach a static equilibrium state. In this way, the anchor device can bear part of the shear stress and instantaneous large axial stress generated by fault dislocation at the fault position, avoid the breakage of the anchor device, maintain the integrity of the anchor device support, and achieve safe and stable support for the surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an anchor device suitable for fault anchoring according to an embodiment of the present invention;

[0033] Figure 2 This is a support arrangement diagram of an anchor device suitable for fault anchoring according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic structural diagram of an outer sleeve in an anchor device suitable for fault anchoring according to an embodiment of the present invention;

[0035] Figure 4 for Figure 1 Middle AA section view;

[0036] Figure 5 for Figure 1 Middle BB section view;

[0037] Figure 6 for Figure 1 Middle CC section view;

[0038] Figure 7 for Figure 1 Middle DD section view;

[0039] Figure 8 A top view of a first steel strand connection plate in an anchor device suitable for fault anchoring according to an embodiment of the present invention;

[0040] Fig. 9 A bottom view of a second steel strand connection plate in an anchor device suitable for fault anchoring according to an embodiment of the present invention;

[0041] Fig.10 The figure is a schematic diagram of assembling an outer sleeve in an anchor device suitable for fault anchoring according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings, in which some but not all embodiments will be shown. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention meets applicable legal requirements.

[0043] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "back" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In an embodiment of the present invention, an anchor device suitable for fault anchoring and a support method suitable for fault anchoring are provided. Figures 1 to 10 shown.

[0045] An anchor rod device suitable for fault anchoring comprises an outer sleeve 1, a first steel strand connection plate 21, a second steel strand connection plate 22, a pressure cylinder 3, an upper anchor rod 41, a lower anchor rod 42 and a steel strand 5.

[0046] The inner part of the outer sleeve 1 is provided with an anchor rod cavity 11, a first connection plate assembly cavity 12, a stranded wire cavity 13, a second connection plate assembly cavity 14 and a pressure relief cavity 15 from top to bottom, and the anchor rod cavity 11, the first connection plate assembly cavity 12, the stranded wire cavity 13, the second connection plate assembly cavity 14 and the pressure relief cavity 15 are connected in sequence. The upper end of the anchor rod cavity 11 is exposed from the upper end surface of the outer sleeve 1, and the lower end of the pressure relief cavity 15 is exposed from the lower end surface of the outer sleeve 1; the circumferential inner wall of the first connection plate assembly cavity 12 is set as a first threaded hole 121, a limiting step 16 is set between the second connection plate assembly cavity 14 and the stranded wire cavity 13, and the circumferential inner wall of the pressure relief cavity 15 is set as a second threaded hole 151.

[0047] The circumferential outer wall of the first steel strand connection disk 21 is provided with a first external thread, the first external thread matches the first threaded hole 121 , and a third threaded hole 211 is provided in the middle of the first steel strand connection disk 21 .

[0048] A fourth threaded hole 221 is formed in the middle of the second steel strand connection plate 22 .

[0049] The circumferential outer wall of the pressing cylinder 3 is set as a second external thread, and the second external thread matches the second threaded hole 151. The inner wall of the pressing cylinder 3 is set with four annular pressing sheets 6, and the middle position of the pressing sheet 6 is set as a through hole.

[0050] Four pressure-releasing plates 6 are arranged at set intervals along the axial direction of the pressure-releasing cylinder 3, so that when the second steel strand connection disk 22 moves along the axial direction of the pressure-releasing cylinder 3, the four pressure-releasing plates 6 act on the second steel strand connection disk 22 in turn, and the four pressure-releasing plates 6 realize pressure-releasing buffering in turn. Adjacent pressure-releasing plates 6 are arranged at set intervals to leave space for the pressure-releasing plates 6 above to deform downward, and the pressure-releasing plates 6 realize pressure-releasing buffering by being squeezed and deformed. Among them, along the axial direction of the pressure-releasing cylinder 3 from top to bottom, the thickness of the four pressure-releasing plates 6 increases in turn, and the deformation amount of the four pressure-releasing plates 6 squeezed and deformed from top to bottom gradually decreases, and the four pressure-releasing plates 6 realize progressive pressure-releasing buffering from top to bottom; and after the pressure-releasing plates 6 above are squeezed and deformed, the pressure-releasing cylinder 3 and the second steel strand connection disk 22 are firmly connected through the pressure-releasing plates 6 below, so that the anchor device is kept under greater axial stress.

[0051] The circumferential outer wall of the lower end of the upper anchor rod 41 is provided with a third external thread, and the third external thread matches the third threaded hole 211 .

[0052] The circumferential outer wall of the upper end of the lower anchor rod 42 is set as a fourth external thread, and the fourth external thread matches the fourth thread 221.

[0053] The first steel strand connection plate 21 is threadedly connected in the first connection plate assembly cavity 12 , the upper anchor rod 41 passes through the anchor rod cavity 11 , and the lower end of the upper anchor rod 41 is threadedly connected in the third threaded hole 211 .

[0054] The second steel strand connection disk 22 is placed in the second connection disk assembly cavity 14, the upper edge of the second steel strand connection disk 22 overlaps the limiting step 16, the lower anchor rod 42 passes through the pressure relief cavity 15, and the upper end of the lower anchor rod 42 is threadedly connected to the fourth threaded hole 221.

[0055] A plurality of steel strands 5 are connected between the first steel strand connection disk 21 and the second steel strand connection disk 22 . When the edge of the second steel strand connection disk 22 overlaps the limiting step 16 , the steel strands 5 are in a relaxed state.

[0056] The pressure release cylinder 3 is threadedly connected to the pressure release cavity 15, the lower anchor rod 42 passes through the through hole in the middle of the pressure release sheet 6, and the uppermost pressure release sheet 6 overlaps the lower edge of the second steel strand connection disk 22. The second steel strand connection disk 22 is restricted in the second connection disk assembly cavity 14 by the uppermost pressure release sheet 6 and the limiting step 16.

[0057] In order to facilitate the assembly of the first steel strand connection disk 21 and the steel strand 5, the outer sleeve 1 includes a half sleeve 11 and a right half sleeve 102, and the outer contours of the half sleeve 11 and the right half sleeve 102 are both semi-cylindrical. The left half sleeve 101 and the right half sleeve 102 are assembled and connected as a whole, and the left half sleeve 101 is provided with an internal thread on the inner wall of the first connection disk assembly cavity 12. In this way, the upper end of the steel strand 5 is connected to the first steel strand connection disk 21, and then the first steel strand connection disk 21 is threadedly connected to the left half sleeve 101 on the inner wall of the first connection disk assembly cavity 12, and finally the right half sleeve 102 is buckled on the half sleeve 11 so that the two are assembled and connected as a whole. Among them, the left half sleeve 101 and the right half sleeve 102 are assembled and connected as a whole via the clamp 103. The left half sleeve 101 and the right half sleeve 102 are provided with assembly grooves 104 at the joints with the clamp 103 , and the clamp 103 is located in the assembly grooves 104 so that the clamp 103 and the outer sleeve 1 are firmly assembled to prevent the clamp 103 from falling off the outer sleeve 1 .

[0058] The first steel strand connection disk 21 has a first wire hole 212 axially formed, and the upper end surface of the first steel strand connection disk 21 has a first recessed groove 213 formed at the edge of the first wire hole 212. The upper end of the steel strand 5 passes through the first wire hole 212, and the upper end of the steel strand 5 is equipped with a first stopper 51, and the first stopper 51 is located in the first recessed groove 213. The second steel strand connection disk 22 has a second wire hole 222 axially formed, and the lower end surface of the second steel strand connection disk 22 has a second recessed groove 223 formed at the edge of the second wire hole 222. The lower end of the steel strand 5 passes through the second wire hole 222, and the lower end of the steel strand 5 is equipped with a second stopper 52, and the second stopper 52 is located in the second recessed groove 223. In this way, the connection between the steel strand 5 and the first steel strand connection disk 21 and the second steel strand connection disk 22 is realized, and the connection is convenient and firm.

[0059] In an embodiment of the present invention, a support method suitable for fault anchoring is also provided, using the above-mentioned anchor device suitable for fault anchoring;

[0060] The method is as follows:

[0061] Step 1, drilling a hole in the surrounding rock to form an anchor hole 7 and determining the position of the fault in the anchor hole 7, and setting the lengths of the upper anchor 41 and the lower anchor 42 according to the depth of the anchor hole 7 and the position of the fault in the anchor hole 7;

[0062] First, the upper end of the steel strand 5 is connected to the first steel strand connection plate 21, the first steel strand connection plate 21 is connected to the first connection plate assembly cavity 12, the upper anchor rod 41 passes through the anchor rod cavity 11, and the lower end of the upper anchor rod 41 is connected to the third threaded hole 211 of the first steel strand connection plate 21;

[0063] Then connect the lower end of the steel strand 5 to the second steel strand connection disk 22, place the second steel strand connection disk 22 in the second connection disk assembly cavity 14, overlap the upper edge of the second steel strand connection disk 22 on the limiting step 16, so that the steel strand 5 is in a relaxed state, pass the lower anchor rod 42 through the pressure relief cavity 15, and connect the upper end of the lower anchor rod 42 to the fourth threaded hole 221 of the second steel strand connection disk 22;

[0064] Finally, the pressure-releasing cylinder 3 is threadedly connected to the pressure-releasing cavity 15 , and the lower anchor rod 42 passes through the through hole in the middle of the pressure-releasing plate 6 , and the uppermost pressure-releasing plate 6 overlaps the lower edge of the second steel strand connection plate 22 .

[0065] Step 2: Put the anchoring agent into the anchor hole 7, place the anchor device suitable for fault anchoring in the anchor hole 7, the lower anchor 42 is located inside the anchor hole 7, and the upper anchor 41 is located outside the anchor hole 7, so that the outer sleeve 1 corresponds to the position of the fault in the anchor hole 7, the anchor device suitable for fault anchoring is anchored to the surrounding rock through the anchoring agent, and the outer end of the upper anchor 41 is fixed to the outer wall of the surrounding rock through the anchor assembly (anchor plate 81, locking nut 82). In addition, when the anchor device suitable for fault anchoring needs to be arranged at an inclined angle relative to the outer wall of the surrounding rock, a triangular bracket 83 can be arranged between the anchor assembly and the outer wall of the surrounding rock.

[0066] Step 3. When fault displacement occurs, the lower anchor rod 42 moves relative to the upper anchor rod 41, and the outer sleeve 1 bends. At the same time, the second steel strand connecting disk 22 moves away from the first steel strand connecting disk 21, and part or all of the steel strands 5 change from a relaxed state to a tensioned state. The second steel strand connecting disk 22 moves along the axial direction of the pressure cylinder 3, so that the pressure plate 6 is squeezed and deformed, and finally the steel strands 5 and the pressure plate 6 reach a static equilibrium state.

[0067] So far, the present embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the anchor device applicable to fault anchoring of the present invention. The anchor device and support method suitable for fault anchoring of the present invention make the outer sleeve 1 correspond to the position of the fault in the anchor borehole 7. During the normal support process, the entire device is connected as an integrated structure to withstand axial stress and achieve support for the surrounding rock. When the fault dislocation occurs, the lower anchor rod 42 moves displacedly relative to the upper anchor rod 41, and the outer sleeve 1 is a hollow structure at the position of the strand cavity 13 so that the outer sleeve 1 bends at the position of the strand cavity 13. At the same time, the second steel strand connection disk 22 is away from the first steel strand connection disk 21, and part or all of the steel strands 5 are changed from a relaxed state to a tensioned state. After the steel strands 5 are tensioned, they are subjected to force to strengthen the connection strength between the upper anchor rod 41 and the lower anchor rod 42. The second steel strand connection disk 22 moves along the axial direction of the pressure cylinder 3, so that the pressure plate 6 is squeezed and deformed to achieve pressure buffering. As the steel strands 5 are continuously tensioned and the pressure plate 6 is continuously squeezed and deformed, the steel strands 5 and the pressure plate 6 finally reach a static equilibrium state. In this way, the anchor device can bear part of the shear stress and instantaneous large axial stress generated by fault dislocation at the fault position, avoid the breakage of the anchor device, maintain the integrity of the anchor device support, and achieve safe and stable support for the surrounding rock.

[0068] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anchor device suitable for fault anchoring, characterized in that: It includes an outer sleeve, a first steel strand connection plate, a second steel strand connection plate, a pressure cylinder, an upper anchor rod, a lower anchor rod and steel strands; The interior of the outer sleeve is provided with an anchor rod cavity, a first connection plate assembly cavity, a stranded wire cavity, a second connection plate assembly cavity and a pressure relief cavity which are connected in sequence from top to bottom. The upper end of the anchor rod cavity is exposed from the upper end surface of the outer sleeve, and the lower end of the pressure relief cavity is exposed from the lower end surface of the outer sleeve. The circumferential inner wall of the first connection plate assembly cavity is set as a first threaded hole, a limited position step is set between the second connection plate assembly cavity and the stranded wire cavity, and the circumferential inner wall of the pressure relief cavity is set as a second threaded hole. The circumferential outer wall of the first steel strand connection disk is provided with a first external thread matching the first threaded hole, and a third threaded hole is provided in the middle of the first steel strand connection disk; A fourth threaded hole is provided in the middle of the second steel strand connection plate; The circumferential outer wall of the pressure-releasing cylinder is provided with a second external thread matching the second threaded hole, the inner wall of the pressure-releasing cylinder is provided with a plurality of annular pressure-releasing sheets, and the middle position of the pressure-releasing sheets is provided with a through hole; A plurality of pressing sheets are arranged at a set distance along the axial direction of the pressing cylinder, and the thickness of the pressing sheets increases from top to bottom along the axial direction of the pressing cylinder; The circumferential outer wall of the lower end of the upper anchor rod is provided with a third external thread matching the third threaded hole; The circumferential outer wall of the upper end of the lower anchor rod is provided with a fourth external thread matching the fourth threaded hole; The first steel strand connection plate is threadedly connected to the first connection plate assembly cavity, the upper anchor rod passes through the anchor rod cavity, and the lower end of the upper anchor rod is threadedly connected to the third threaded hole; The second steel strand connection disk is placed in the second connection disk assembly cavity, the upper edge of the second steel strand connection disk overlaps the limit step, the lower anchor rod passes through the pressure relief cavity, and the upper end of the lower anchor rod is threadedly connected to the fourth threaded hole; A plurality of steel strands are connected between the first steel strand connection disk and the second steel strand connection disk, and when the edge of the second steel strand connection disk overlaps the limiting step, the steel strands are in a relaxed state; The pressure-releasing cylinder is threadedly connected to the pressure-releasing cavity, the lower anchor rod passes through the through hole in the middle of the pressure-releasing plate, and the uppermost pressure-releasing plate overlaps the lower edge of the second steel strand connecting disk.

2. The anchor device suitable for fault anchoring according to claim 1, characterized in that: The outer sleeve includes a left half sleeve and a right half sleeve with a semi-cylindrical outer contour. The left half sleeve and the right half sleeve are assembled and connected as a whole. One of the left half sleeve and the right half sleeve is provided with an internal thread on the inner wall of the first connecting plate assembly cavity.

3. The anchor device suitable for fault anchoring according to claim 2, characterized in that: The left half sleeve and the right half sleeve are connected as a whole through a clamp assembly.

4. The anchor device suitable for fault anchoring according to claim 1, characterized in that: The matching positions of the left half sleeve, the right half sleeve and the clamp are provided with assembly grooves, and the clamp is located in the assembly grooves.

5. The anchor device suitable for fault anchoring according to claim 1, characterized in that: The first steel strand connecting disk has a first wire hole opened along the axial direction, and a first recessed groove is opened on the upper end surface of the first steel strand connecting disk at the edge of the first wire hole, the upper end of the steel strand passes through the first wire hole, and the upper end of the steel strand is equipped with a first limit block, and the first limit block is located in the first recessed groove; the second steel strand connecting disk has a second wire hole opened along the axial direction, and a second recessed groove is opened on the lower end surface of the second steel strand connecting disk at the edge of the second wire hole, the lower end of the steel strand passes through the second wire hole, and the lower end of the steel strand is equipped with a second limit block, and the second limit block is located in the second recessed groove.

6. A support method suitable for fault anchoring, characterized in that: An anchor device suitable for fault anchoring according to any one of claims 1 to 5; The method is as follows: Step 1: Drill a hole into the surrounding rock to form an anchor hole and determine the position of the fault layer in the anchor hole, and set the length of the upper anchor and the lower anchor according to the depth of the anchor hole and the position of the fault layer in the anchor hole; First, the upper end of the steel strand is connected to the first steel strand connection disk, the first steel strand connection disk is connected to the first connection disk assembly cavity, the upper anchor rod is passed through the anchor rod cavity, and the lower end of the upper anchor rod is connected to the third threaded hole of the first steel strand connection disk; Then connect the lower end of the steel strand to the second steel strand connection disk, place the second steel strand connection disk in the second connection disk assembly cavity, overlap the upper end edge of the second steel strand connection disk on the limiting step, so that the steel strand is in a relaxed state, pass the lower anchor rod through the pressure relief cavity, and connect the upper end of the lower anchor rod to the fourth threaded hole of the second steel strand connection disk; Finally, the pressure-releasing cylinder is threadedly connected to the pressure-releasing cavity, the lower anchor rod passes through the through hole in the middle of the pressure-releasing plate, and the uppermost pressure-releasing plate overlaps the lower edge of the second steel strand connection plate; Step 2: Put the anchoring agent into the anchor hole, place the anchor device suitable for fault anchoring in the anchor hole, the lower anchor is located inside the anchor hole, and the upper anchor is located outside the anchor hole, so that the outer sleeve corresponds to the position of the fault in the anchor hole, the anchor device suitable for fault anchoring is anchored to the surrounding rock through the anchoring agent, and the outer end of the upper anchor is fixed to the outer wall of the surrounding rock through the anchor assembly; Step 3. When fault movement occurs, the lower anchor rod moves relative to the upper anchor rod, and the outer sleeve bends. At the same time, the second steel strand connection disk moves away from the first steel strand connection disk, and some or all of the steel strands change from a relaxed state to a tensioned state. The second steel strand connection disk moves along the axial direction of the pressure cylinder, so that the pressure plate is squeezed and deformed, and finally the steel strands and the pressure plate reach a static equilibrium state.

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