Grouting anchor cable

Abstract

The grouting anchor cable comprises an anchor cable body and a constant-resistance plugging device, and a positioning device is arranged at one end of the anchor cable body; the positioning device comprises a positioning shell, a positioning claw is rotationally connected to the positioning shell, a torsion spring enabling the positioning claw to be folded in the positioning shell is arranged between the positioning claw and the positioning shell, a pushing piece is arranged in the positioning shell in a penetrating mode, and the pushing piece comprises a pushing rod and a pushing block fixedly connected with the pushing rod. A pushing slope and a positioning bulge are arranged on the pushing block, a guide inclined surface matched with the pushing slope is arranged on the positioning claw, and a clamping tooth part matched with the positioning bulge is arranged in the positioning shell; the anchor cable can be prevented from position deviation in the grouting process, the tensile strength and bearing capacity of the anchor cable are improved, the connection time between procedures is shortened, seamless connection between the grouting process and tensioning operation is ensured, the grouting compactness and uniformity are improved, and the overall stability and safety of a supporting structure are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of engineering anchoring, in particular to a grouting anchor cable. Background Art

[0002] In the fields of geotechnical engineering, tunnel engineering, mining and geological disaster management, anchor cables are widely used as an important supporting structure to strengthen and stabilize rock and soil. The anchor cables are buried inside the rock and soil, and the grouting materials are used to tightly combine the anchor cables with the rock and soil to form a strong anchoring force, thereby enhancing the overall stability and bearing capacity of the rock and soil.

[0003] However, in the anchor cable construction technology, there is a common and urgent problem to be solved: the anchor cable is prone to position displacement during the grouting process and the use of anchoring agents to fix the anchor cable is cumbersome and delays the construction. For example, the anchor cable proposed in the Chinese patent with announcement number 110905572 lacks effective positioning. When the borehole is drilled and the anchor cable is placed in the borehole, when the grouting material is injected into the borehole, the anchor cable is easily affected by the grouting pressure or the characteristics of the rock and soil itself, and falls back to one side of the borehole, causing the position of the anchor cable to shift and deviate from the original design of the anchor cable axis; in addition, the anchor cable proposed in the Chinese patent with announcement number 218376527 is fixed by an anchoring agent, which is suitable for end anchoring construction. For the grouting anchor cable with full-length anchoring, fixing it by an anchoring agent will have different degrees of influence on the construction efficiency and engineering cost.

[0004] The displacement of the anchor cable will bring about a series of serious problems. First, it will lead to insufficient anchoring depth of the anchor cable in the rock and soil, thereby reducing the tensile strength and bearing capacity of the anchor cable. Secondly, it will be subjected to uneven resistance during the tensioning process. This uneven resistance will not only increase the load of the tensioning equipment, but may also cause the anchor cable to break or slip during the tensioning process, further affecting the overall stability and safety of the support structure. More seriously, the displacement of the anchor cable will also have a long-term adverse effect on the subsequent reinforcement and support effects of the rock and soil. Since the anchor cable cannot effectively transmit and disperse the deformation energy of the rock and soil, the rock and soil is prone to greater deformation and damage when subjected to external forces, thereby endangering the safety and stability of the entire support structure.

[0005] Therefore, in order to solve the above problems, it is urgent to propose a new grouting anchor cable, which can prevent the anchor cable from position shifting during the grouting process, ensure that the anchor cable remains in the designed position, reduce the connection time between processes, ensure seamless connection between the grouting process and the tensioning operation, improve the grouting density and uniformity, improve the tensile strength and bearing capacity of the anchor cable, and ensure the overall stability and safety of the support structure. Summary of the invention

[0006] The present invention provides a grouting anchor cable, comprising an anchor cable body and a constant resistance plugging device, wherein a positioning device is arranged at one end of the anchor cable body;

[0007] The positioning device comprises a positioning housing, a positioning claw is rotatably connected to the positioning housing, a torsion spring is arranged between the positioning claw and the positioning housing to retract the positioning claw into the positioning housing, a push piece is passed through the positioning housing, and the push piece comprises a push rod and a push block fixedly connected to the push rod;

[0008] Among them, a pushing slope and a positioning protrusion are arranged on the pushing block, a guiding inclined surface matching the pushing slope is arranged on the positioning claw, and a locking tooth portion matching the positioning protrusion is arranged in the positioning shell. When the pushing piece is pushed, the pushing slope contacts the guiding inclined surface to push the positioning claw to rotate, and the pushing block is pressed tightly against the positioning claw through the positioning protrusion and the locking tooth portion.

[0009] Furthermore, a accommodating chamber for accommodating at least part of the pushing member and a pushing through hole connected to the accommodating chamber are provided in the positioning shell, the pushing block is located in the accommodating chamber, the pushing rod is passed through the pushing through hole in the positioning shell, and the locking tooth portion is provided on the inner wall of the chamber groove.

[0010] Furthermore, at least three pushing wedges are arranged on the pushing block and are distributed at equal angles with the pushing block as the center. The pushing slope is arranged at one end of the pushing wedge close to the positioning claw. A movable slot allowing the pushing wedge to move is opened in the positioning shell, and a positioning claw is rotatably connected to the bottom of the movable slot.

[0011] Furthermore, a first connecting protrusion is provided at the bottom of the movable groove, a rotating column is provided on the first connecting protrusion, a second connecting protrusion corresponding to the first connecting protrusion is provided on the positioning claw, a rotating hole corresponding to the rotating column is provided in the second connecting protrusion, a receiving hole connected to the rotating hole is provided in the second connecting protrusion, and a torsion spring is arranged in the receiving hole, wherein one end of the torsion spring is clamped with the inner wall of the receiving hole, and a clamping groove for accommodating the other end of the torsion spring is provided in the first connecting protrusion.

[0012] Furthermore, a support spring for resisting and pushing the push block is arranged in the positioning shell, a support groove for accommodating the support spring is arranged at the bottom of the accommodating chamber, and a positioning protrusion for positioning the support spring is arranged in the support groove.

[0013] Furthermore, the pushing slope includes a guiding portion and a clamping portion, wherein the guiding portion is used to push the positioning claw to rotate in a direction away from the accommodating bin, and the clamping portion is used to clamp the positioning claw against the guiding slope when the positioning claw is fully opened to ensure its stable open state.

[0014] Furthermore, the guiding slope includes a guiding surface and a pressing surface, wherein the guiding surface is used to abut against the guiding portion to rotate the positioning claw in a direction away from the accommodating bin, and the pressing surface is used to cooperate with the pressing portion to keep the positioning claw open when the positioning claw is fully opened.

[0015] Furthermore, a pushing head is arranged at one end of the pushing rod away from the pushing block, and the pushing head is roughly conical.

[0016] Furthermore, the constant resistance sealing device includes a positioning tube and a constant resistance device, the constant resistance device includes a constant resistance sleeve arranged in the positioning tube, a main locking plug for sealing the constant resistance sleeve, and a gasket and a locking nut abutting the main locking plug, wherein a slurry discharge port and a secondary locking plug for sealing the slurry discharge port are provided in the main locking plug.

[0017] Furthermore, an internal friction protrusion is arranged in the constant resistance device sleeve, a grouting port is arranged on the constant resistance device sleeve, and the main locking plug is used to block the grouting port.

[0018] The beneficial effects of the present invention are:

[0019] The present invention ensures that the anchor cable can be accurately positioned at the center of the borehole during the grouting process through positioning devices such as a push piece, a positioning claw, and a torsion spring, effectively preventing the anchor cable from falling back or deviating to one side of the borehole. The stability and reliability of the positioning device ensure that the anchor cable always maintains its position during tensioning and grouting and subsequent processes, and grouting can be directly performed after tensioning, which significantly improves the support effect and overall stability of the anchor cable and reduces the connection time between processes.

[0020] The hollow grouting design enables the slurry to evenly and fully fill the gap between the borehole and the rock and soil, enhancing the bonding strength between the anchor cable and the rock and soil; the setting of the constant resistance plugging device not only ensures the continuity of the grouting process, but also prevents the leakage of slurry after the grouting is completed, thereby optimizing the grouting effect and improving the strength and durability of the support structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] In the attached figure:

[0023] Figure 1 is a schematic diagram of grouting anchor cable;

[0024] Figure 2 It is a cross-sectional view of the grouting anchor cable;

[0025] Figure 3 is a cross-sectional view of the positioning device in an open state;

[0026] Figure 4 Cross-sectional view of the positioning device in the closed state Figure 1 ;

[0027] Figure 5 Cross-sectional view of the positioning device in the closed state Figure 2 ;

[0028] Figure 6 is a schematic diagram of a push member;

[0029] Figure 7 is a schematic diagram of the positioning claw;

[0030] Figure 8 Cross-sectional view of the positioning device in the closed state Figure 3 ;

[0031] Fig. 9 for Figure 8 A magnified schematic diagram of center A.

[0032] In the figure:

[0033] Anchor cable body (1); constant resistance plugging device (2); positioning tube (21); constant resistance device (22); constant resistance sleeve (221); inner friction protrusion (2211); grouting port (2212); main locking plug (222); grouting port (2221); gasket (223); locking nut (224); secondary locking plug (225); positioning device (3); positioning housing (31); containing chamber (311); push-pushing hole (312); movable slot (313); first connecting protrusion (314); slot (3141); rotating column (3142); supporting slot (3143); 15); a positioning block (316); a positioning claw (32); a second connecting protrusion (321); a rotating hole (322); a receiving hole (323); a torsion spring (33); a pushing member (34); a pushing rod (341); a pushing head (3411); a pushing block (342); a pushing wedge (343); a pushing slope (344); a guiding portion (3441); a pressing portion (3442); a positioning protrusion (345); a guiding inclined surface (346); a guiding surface (3461); a pressing surface (3462); a locking tooth portion (347); and a supporting spring (35). DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described below in conjunction with the accompanying drawings of the present invention, but the described embodiments are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 9As shown, the present invention provides a grouting anchor cable, comprising an anchor cable body 1 and a constant resistance plugging device 2, wherein a positioning device 3 is provided at one end of the anchor cable body 1;

[0036] The positioning device 3 includes a positioning housing 31, a positioning claw 32 is rotatably connected to the positioning housing 31, a torsion spring 33 is arranged between the positioning claw 32 and the positioning housing 31 to retract the positioning claw 32 into the positioning housing 31, and a push member 34 is inserted in the positioning housing 31, and the push member 34 includes a push rod 341 and a push block 342 fixedly connected to the push rod 341;

[0037] Among them, a pushing slope 344 and a positioning protrusion 345 are arranged on the pushing block 342, a guiding slope 346 matching the pushing slope 344 is arranged on the positioning claw, and a locking tooth portion 347 matching the positioning protrusion 345 is arranged in the positioning shell 31. When the pushing member 34 is pushed, the pushing slope 344 contacts the guiding slope 346 to push the positioning claw 32 to rotate, and the pushing block 342 is pressed tightly against the positioning claw 32 through the positioning protrusion 345 and the locking tooth portion 347.

[0038] In this embodiment, the anchor cable body 1 is made of high-strength alloy material as the main body bearing the tension, ensuring that it will not deform or break during grouting and long-term use. The constant resistance plugging device 2 and the positioning device 3 are responsible for the plugging and constant resistance after grouting and the positioning and installation of the anchor cable respectively.

[0039] like Figures 2 to 5 As shown, in this embodiment, a accommodating chamber 311 for accommodating at least part of the pushing member 34 and a pushing through hole 312 connected to the accommodating chamber 311 are provided in the positioning shell 31, the pushing block 342 is located in the accommodating chamber 311, the pushing rod 341 is passed through the pushing through hole 312 and is arranged in the positioning shell 31, and the locking tooth portion 347 is arranged on the inner wall of the chamber groove.

[0040] Specifically, the positioning shell 31 is made of high-quality steel, which is precision machined and heat-treated to ensure that it has high hardness and wear resistance. A storage bin 311 and a push-up through hole 312 are provided inside the shell. The storage bin 311 is used to install the push-up block 342 and the support spring 35, and the push-up through hole 312 allows the push rod 341 to pass through. The locking tooth portion 347 is arranged on the inner wall of the storage bin and cooperates with the positioning protrusion 345. When the positioning claw 32 is opened, the pressing portion 3442 of the push block 342 is meshed and engaged with the locking tooth portion 347, so as to realize the tight fixation of the push block 342 and the stable opening state of the positioning claw 32.

[0041] like Figure 3 , Figure 4 and Figure 6As shown, in this embodiment, at least three pushing wedges 343 are arranged on the pushing block 342 at equal angles with the pushing block 342 as the center, a pushing slope 344 is arranged at one end of the pushing wedge 343 close to the positioning claw 32, and a movable slot 313 is opened in the positioning shell 31 to allow the pushing wedge 343 to move, and the positioning claw 32 is rotatably connected to the bottom of the movable slot 313.

[0042] Specifically, the push block 342 is designed to be circular or square, and is provided with a push slope 344 and a positioning protrusion 345 on the surface. The push slope 344 includes a guide portion 3441 and a pressing portion 3442. The push slope 344 is used to push the positioning claw 32 to rotate, and the positioning protrusion 345 cooperates with the locking tooth portion 347 to achieve the tight pressing and fixing of the push block 342.

[0043] like Figures 7 to 9 As shown, in the present embodiment, a first connecting protrusion 314 is provided at the bottom of the movable slot 313, a rotating column 3142 is provided on the first connecting protrusion 314, a second connecting protrusion 321 corresponding to the first connecting protrusion 314 is provided on the positioning claw 32, a rotating hole 322 corresponding to the rotating column 3142 is provided in the second connecting protrusion 321, a receiving hole 323 connected to the rotating hole 322 is provided in the second connecting protrusion 321, and a torsion spring 33 is arranged in the receiving hole 323, wherein one end of the torsion spring 33 is clamped with the inner wall of the receiving hole 323, and a clamping groove 3141 for accommodating the other end of the torsion spring 33 is provided in the first connecting protrusion 314.

[0044] Specifically, the positioning claw 32 is designed as a claw-shaped structure, which is connected to the positioning housing 31 through the rotating column 3142 and the second connecting protrusion 321. The end of the positioning claw 32 is provided with a contact surface that contacts the drill hole to ensure that the anchor cable can be stably fixed in the drill hole. The torsion spring 33 is arranged in the receiving hole 323, one end of which is clamped to the inner wall of the receiving hole 323, and the other end is clamped to the clamping groove 3141 of the first connecting protrusion 314. The elastic force of the torsion spring 33 keeps the positioning claw 32 in a retracted state when not subjected to external force, so as to facilitate the insertion of the anchor cable.

[0045] like Figures 3 to 5 As shown, in this embodiment, a support spring 35 for resisting the pushing block 342 is provided in the positioning shell 31, a support groove 315 for accommodating the support spring 35 is provided at the bottom of the accommodating chamber 311, and a positioning block 316 for positioning the support spring 35 is provided in the support groove 315.

[0046] Specifically, the support spring 35 is arranged in the support groove at the bottom of the accommodating chamber 311 to push the push block 342 to ensure that it remains in place when not under force. The elastic force of the support spring 35 can be adjusted according to actual needs to adapt to different grouting pressures and grouting time requirements.

[0047] like Figure 3 and Figure 6 As shown, in this embodiment, the pushing ramp 344 includes a guiding portion 3441 and a clamping portion 3442. The guiding portion 3441 is used to push the positioning claw 32 to rotate in a direction away from the accommodating chamber 311, and the clamping portion 3442 is used to press the positioning claw 32 against the guiding slope 346 when the positioning claw 32 is fully opened to ensure its stable open state.

[0048] like Figure 4 and Figure 7 As shown, in this embodiment, the guide slope 346 includes a guide surface 3461 and a clamping surface 3462. The guide surface 3461 is used to abut the guide portion 3441 to rotate the positioning claw 32 in a direction away from the accommodating chamber 311, and the clamping surface 3462 is used to cooperate with the clamping portion 3442 to keep the positioning claw 32 open when the positioning claw 32 is fully opened.

[0049] like Figure 3 As shown, in this embodiment, a push head 3411 is provided at one end of the push rod 341 away from the push block 342, and the push head 3411 is roughly conical. The push rod 341 is made of high-strength alloy steel and has a smooth surface to reduce the friction resistance between the positioning housing. A conical push head 3411 is provided at one end of the push rod 341 to facilitate the push operation with the drill hole.

[0050] like Figure 1 and Figure 2 As shown, in this embodiment, the constant resistance sealing device 2 includes a positioning tube 21 and a constant resistance device 22, the constant resistance device 22 includes a constant resistance sleeve 221 arranged in the positioning tube 21, and a main locking plug 222 for sealing the constant resistance sleeve 221, and a gasket 223 and a locking nut 224 abutting the main locking plug 222, wherein a slurry discharge port 2221 and a secondary locking plug 225 for sealing the slurry discharge port 2221 are provided in the main locking plug 222.

[0051] Specifically, the constant resistance sleeve 221 is made of high-strength wear-resistant material, and is provided with an internal friction protrusion 2211 inside to increase the resistance during grouting and achieve a constant resistance effect. The constant resistance sleeve 221 is fixedly connected to the positioning tube 21, and the constant resistance sleeve 221 is provided with a grouting port 2212 and a grouting port 2221. The grouting port 2212 is used for grouting operation, and the grouting port 2221 is used for slurry discharge after grouting is completed. The gasket 223 and the locking nut 224 are used to fix the main lock plug 222 and the secondary lock plug 225 to ensure that the grouting port 2212 will not loosen or leak during grouting and long-term use. The material of the locking nut 224 can be selected from high-strength alloy steel or stainless steel.

[0052] like Figure 2As shown, in this embodiment, an internal friction protrusion 2211 is provided in the constant resistance sleeve 221 , a grouting port 2212 is provided on the constant resistance sleeve 221 , and a main locking plug 222 is used to block the grouting port 2212 .

[0053] Specifically, the main lock plug 222 is a cylindrical or conical structure, and a sealing surface matching the grouting port 2212 is provided inside. A threaded hole or a slot matching the secondary lock plug 225 is provided on the sealing surface, which is used to fix the secondary lock plug 225. The secondary lock plug 225 is a conical or cylindrical structure, and a thread or buckle matching the main lock plug 222 is provided on the surface. After the grouting is completed, the secondary lock plug 225 is fixed to the main lock plug 222 by rotating or inserting it, so as to achieve the sealing of the grouting port 2212.

[0054] The use process of a grouting anchor provided by the present invention is as follows:

[0055] Insert the anchor cable body directly into the drill hole, open the positioning claws, insert and anchor the drill hole, or (if necessary) use an external tool to push the positioning device to anchor the anchor cable body in the drill hole;

[0056] When the positioning claw is fully opened, the pressing part of the push block fits tightly with the locking tooth part, so that the push block is pressed and fixed and the positioning claw is in a stable open state;

[0057] Install the positioning tube and constant resistance sleeve, and prestress the anchor cable body;

[0058] The slurry is injected into the grouting port through the grouting pipe. The slurry is subjected to the resistance of the internal friction protrusion in the constant resistance device sleeve to achieve a constant resistance effect.

[0059] After the grouting is completed, the main lock plug and the secondary lock plug are rotated or inserted in sequence to seal the grouting port.

[0060] Finally, use the locking nut to fix the main lock plug and the secondary lock plug to ensure that the grouting port will not loosen or leak during long-term use.

[0061] The present invention has many application scenarios, including but not limited to the following description scenarios:

[0062] In tunnel excavation and subway construction, grouting anchor cables are often used to reinforce and support tunnel surrounding rocks. Grouting fills the cracks in the surrounding rocks to improve the overall strength and stability of the rock mass. At the same time, the constant resistance device can absorb and disperse the energy generated by the deformation of the surrounding rocks, reduce the pressure of the surrounding rocks on the support structure, and ensure the safety of tunnel construction and operation.

[0063] During mining and underground space development, rock formations are easily disturbed, leading to rock instability. Grouting anchors can be used to reinforce rock formations, improving the integrity and stability of rock formations through grouting. At the same time, constant resistance devices can adapt to slight deformations of rock formations to prevent accidents caused by sudden rock instability.

[0064] During the excavation of deep foundation pits, grouting anchor cables can be used to support the side walls of deep foundation pits to prevent side wall collapse. Grouting increases the strength and stability of the side wall soil, while the tension of the anchor cables can resist the pressure of the side wall soil. The setting of the constant resistance device can adapt to the slight deformation of the side wall soil and ensure the stability of the support structure.

[0065] In the treatment of geological disasters (such as debris flow, landslide, etc.), grouting anchor cables can be used to reinforce the rock and soil in the geological disaster area. Grouting can improve the strength and stability of the rock and soil. At the same time, the tension of the anchor cable can resist the slide or flow of the rock and soil. The setting of the constant resistance device can absorb and disperse the energy generated by geological disasters and reduce the impact of disasters on the surrounding environment and personnel.

Claims

1. A grouting anchor cable, comprising an anchor cable body (1) and a constant resistance plugging device (2), wherein: A positioning device (3) is provided at one end of the anchor cable body (1), characterized in that: The positioning device (3) comprises a positioning shell (31), a positioning claw (32) is rotatably connected to the positioning shell (31), a torsion spring (33) is arranged between the positioning claw (32) and the positioning shell (31) to retract the positioning claw (32) into the positioning shell (31), a pushing member (34) is passed through the positioning shell (31), and the pushing member (34) comprises a pushing rod (341) and a pushing block (342) fixedly connected to the pushing rod (341); A pushing slope (344) and a positioning protrusion (345) are provided on the pushing block (342), a guiding inclined surface (346) matching the pushing slope (344) is provided on the positioning claw, and a locking tooth portion (347) matching the positioning protrusion (345) is provided in the positioning shell (31); when the pushing member (34) is pushed, the pushing slope (344) contacts the guiding inclined surface (346) to push the positioning claw (32) to rotate, and the pushing block (342) is pressed against the positioning claw (32) by the positioning protrusion (345) and the locking tooth portion (347).

2. The grouting anchor cable according to claim 1, characterized in that: A accommodating chamber (311) for accommodating at least part of the pushing member (34) and a pushing through hole (312) communicating with the accommodating chamber (311) are provided in the positioning housing (31); a pushing block (342) is located in the accommodating chamber (311); a pushing rod (341) is inserted into the positioning housing (31) through the pushing through hole (312); and a locking tooth portion (347) is provided on the inner wall of the chamber receiving groove.

3. The grouting anchor cable according to claim 2, characterized in that: At least three pushing wedges (343) are arranged on the pushing block (342) at equal angles with the pushing block (342) as the center of the circle. A pushing slope (344) is arranged at one end of the pushing wedge (343) close to the positioning claw (32). A movable slot (313) allowing the pushing wedge (343) to move is opened in the positioning housing (31), and the positioning claw (32) is rotatably connected to the bottom of the movable slot (313).

4. The grouting anchor cable according to claim 3, characterized in that: A first connecting protrusion (314) is arranged at the bottom of the movable slot (313), a rotating column (3142) is arranged on the first connecting protrusion (314), a second connecting protrusion (321) corresponding to the first connecting protrusion (314) is arranged on the positioning claw (32), a rotating hole (322) corresponding to the rotating column (3142) is arranged in the second connecting protrusion (321), a receiving hole (323) connected to the rotating hole (322) is arranged in the second connecting protrusion (321), and a torsion spring (33) is arranged in the receiving hole (323), wherein one end of the torsion spring (33) is clamped to the inner wall of the receiving hole (323), and a clamping groove (3141) for accommodating the other end of the torsion spring (33) is arranged in the first connecting protrusion (314).

5. The grouting anchor cable according to claim 2, characterized in that: A support spring (35) is arranged in the positioning housing (31) to push against the pushing block (342), a support groove (315) for accommodating the support spring (35) is arranged at the bottom of the accommodating chamber (311), and a positioning block (316) for positioning the support spring (35) is arranged in the support groove (315).

6. The grouting anchor cable according to claim 4, characterized in that: The push ramp (344) includes a guide portion (3441) and a pressing portion (3442), wherein the guide portion (3441) is used to push the positioning claw (32) to rotate in a direction away from the accommodating chamber (311), and the pressing portion (3442) is used to press the positioning claw (32) against the guide slope (346) when the positioning claw (32) is fully opened, so as to ensure its stable open state.

7. The grouting anchor cable according to claim 6, characterized in that: The guiding inclined surface (346) comprises a guiding surface (3461) and a pressing surface (3462), wherein the guiding surface (3461) is used to abut against the guiding portion (3441) to rotate the positioning claw (32) in a direction away from the accommodating chamber (311), and the pressing surface (3462) is used to cooperate with the pressing portion (3442) to keep the positioning claw (32) open when the positioning claw (32) is fully opened.

8. The grouting anchor cable according to claim 7, characterized in that: A pushing head (3411) is provided at one end of the pushing rod (341) away from the pushing block (342), and the pushing head (3411) is roughly conical.

9. The grouting anchor cable according to claim 1, characterized in that: The constant resistance plugging device (2) comprises a positioning tube (21) and a constant resistance device (22), wherein the constant resistance device (22) comprises a constant resistance sleeve (221) arranged in the positioning tube (21), a main locking plug (222) for plugging the constant resistance sleeve (221), and a gasket (223) and a locking nut (224) abutting against the main locking plug (222), wherein a slurry discharge port (2221) and a secondary locking plug (225) for plugging the slurry discharge port (2221) are arranged in the main locking plug (222).

10. The grouting anchor cable according to claim 9, characterized in that: An internal friction protrusion (2211) is arranged in the constant resistance sleeve (221), a grouting port (2212) is arranged on the constant resistance sleeve (221), and a main locking plug (222) is used to block the grouting port (2212).

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