Modularized self-adaptive hollow grouting anchor rod and use method of matched clamp

Abstract

The modularized self-adaptive hollow grouting anchor rod comprises an anchor rod main body and a clamp assembly, the anchor rod main body comprises a plurality of anchor rod sections, grouting holes communicated with the inner diameter are formed in the outer walls of the anchor rod sections, every two adjacent anchor rod sections are in threaded connection, telescopic assemblies are arranged on the outer sides of the anchor rod sections, and the telescopic assemblies are connected with the anchor rod main body. The telescopic assembly comprises a telescopic joint structure and a connecting rod structure, the telescopic joint structure is used for supporting the anchor rod joint, the connecting rod structure is used for driving the telescopic joint structure, the clamp assembly comprises a clamp base, a clamp body is arranged on the clamp base in a sliding mode, and a rope stretching motor is installed on the clamp base. The expansion joint structure can easily realize the expansion of the hollow grouting anchor rod towards the periphery after the hollow grouting anchor rod is mounted in a hole, the expansion structure reduces the stress when the anchor rod is pulled, and the tensile capacity and the anti-floating capacity of the constructed anchor rod are higher.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a method for using a modular adaptive hollow grouting anchor and its matching clamps. Background Art

[0002] As a support structure, anchor bolts are widely used in engineering technology for the main reinforcement of slopes, tunnels, and dams. Compared with other support methods, anchor bolt support technology has significant advantages such as simple process, convenient construction, low material consumption, low cost, and good support effect. Therefore, it is widely used in urban construction and road construction as one of the main support methods.

[0003] There are various types of grouting anchors available. Among them, hollow anchors, due to their hollow design, use the central hole as a high-pressure ventilation and water channel for drilling and a grouting channel. Compared to solid anchors, the hollow design provides better rigidity and shear strength. The anchor's outer surface features a full-length standard large-pitch thread structure. This thread structure facilitates cutting and extending the anchor, and compared to a smooth anchor, it increases the bonding area between the anchor and the grouting material, thereby improving the anchoring force.

[0004] A search revealed that CN113356906A discloses an anchoring device and support method for fixed-length grouting anchors and grouting cables. The device uses a split conical anchor ring and an inner conical ring sleeve with wedge-shaped embedding to form an anchor ring sleeve, which is placed at the front end of the grouting anchor cable to achieve fixed-length anchoring in coal seams at specific depths. The anchor ring sleeve and anchor claw sleeve arranged on both sides of the grout outlet of the grouting anchor cable form a closed borehole space of fixed length, thereby completing fixed-length grouting reinforcement in specific surrounding rock fracture areas. However, in this device, the anchor rod is wrapped by the grouting body, and the contact surface between the two is limited, failing to fully solidify into a whole. The anchor rod is easily pulled out of the grouting body. Therefore, to solve the above problems, a modular adaptive hollow grouting anchor rod and its matching clamps are proposed. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for using a modular adaptive hollow grouting anchor and its matching clamps.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A modular adaptive hollow grouting anchor bolt includes an anchor bolt body comprising multiple anchor bolt sections. Each anchor bolt section has a threaded outer side in the middle portion and a grouting hole on its outer wall that communicates with its inner diameter. Two adjacent anchor bolt sections are threaded together. Each of the multiple anchor bolt sections has a telescopic assembly on its outer side. The telescopic assembly includes a telescopic joint structure and a connecting rod structure. The telescopic joint structure supports the anchor bolt sections, and the connecting rod structure drives the telescopic joint structure.

[0007] The above technical solution further includes: The anchor bolt body also includes a pad that is sleeved on the outside of the anchor bolt section. The bottom of the pad is provided with a grout stop plug that is sleeved on the outside of the anchor bolt section. The top of the pad is fitted with a fastening nut for threaded connection of the anchor bolt section. The tail of the anchor bolt section is threadedly connected to an anchor bolt head, and the middle section of the anchor bolt head is provided with a boss.

[0008] The expansion joint structure includes an outer sleeve, and the anchor rod section and the outer sleeve are connected by a third set screw. The outer sleeve and the anchor rod section are connected by a thread. The outer sleeve has multiple sets of cylindrical boss holes evenly spaced at the middle section. The expansion joint structure is located on the inner wall of the cylindrical boss holes.

[0009] The telescopic joint structure includes a first telescopic joint, which is threadedly connected to the outer sleeve. A second telescopic joint, a third telescopic joint, a fourth telescopic joint, and a telescopic head are sequentially slidably disposed on the inner side of the first telescopic joint.

[0010] The linkage structure includes a first connecting rod, one end of which is threaded to the end of the telescopic head, and the other end of which is rotatably connected to a second connecting rod. The second connecting rod and the outer sleeve are rotatably connected to a third telescopic joint. The end of the anchor bolt section is slidably provided with a pull plate, and the pull plate and the third telescopic joint are rotatably connected to a fourth telescopic joint. A pull rope is installed among the multiple pull plates, and the movement of the pull rope is used to drive the linkage structure to extend.

[0011] A modular adaptive hollow grouting anchor bolt fitting includes a fitting base, a cable tensioning motor mounted on the fitting base, a scale plate mounted on the fitting base, a top plate mounted on the scale plate, a fitting body slidably disposed on the inner side of the base, a push rod fixedly connected to the outer side of the fitting body, a handle rotatably connected to the fitting base, and a connecting rod rotatably connected between the handle and the push rod.

[0012] A rope tensioning motor is installed on the clamp base. The rope passes through the clamp base and the clamp end cover. The output end of the rope tensioning motor is connected to the rope. Multiple handwheels are threaded onto the clamp base, and the bottom of each handwheel is threaded onto a support foot.

[0013] A method for using a modular adaptive hollow grouting anchor and its matching clamps includes the following steps: S1: First, locate the grouting soil and the anchor drilling positions on the slope surface, and start drilling. Control the drilling depth and use a high-pressure water gun to enlarge the hole at the target depth. Form different enlarged sections according to actual needs and clean the hole. S2: Then install the telescopic assembly in the designated position, connect the head and tail threads of multiple anchor bolt sections of appropriate length and assemble them. Then place the installed anchor bolt section in the borehole, put the clamp assembly on the outside of the anchor bolt section extending out of the ground, adjust the height of the top plate according to the design requirements so that the top of the anchor bolt section is in contact with the top plate, and pull up the handle to clamp the grouting anchor bolt between the clamp base and the clamp body. S3: Make the outriggers contact the ground, adjust the anchor bolt clamp handwheel to change the position of the outriggers so that the clamp base is horizontal, pass the pull rope vertically through the anchor bolt clamp and connect it to the rope tension motor, start the rope tension motor to pull the pull rope, and the pull plate pushes the connecting rod structure to extend. Under the drive of the first connecting rod, each expansion joint unfolds from the inside to the outside in sequence until the expansion joint structure is fully unfolded, and the top plate is removed. S4: Connect the grouting pipe to the grouting pump truck and put the grouting pipe into the grouting anchor rod to start grouting. Finally, a grouting consolidation section is formed. Remove the clamp assembly, install the pad, fastening nut and grout stop plug, and rotate the fastening nut to apply pre-tightening force to the grouting anchor rod.

[0014] The present invention has the following beneficial effects: In this invention, the expansion joint structure allows the hollow grouting anchor rod to expand outwards after installation in the hole. The expanded structure reduces the stress on the anchor rod when it is pulled out. Furthermore, the metal expansion joint has stronger strength and rigidity than cement when under stress, resulting in stronger tensile and buoyancy resistance of the anchor rod after construction.

[0015] This invention differs from conventional anchor bolts. In the construction of numerous hollow grouting anchor bolts, the orientation of adjacent expansion joints affects the anchor bolt's anti-buoyancy effect. In other words, the location of the anchor bolt construction affects the anchoring performance. The connecting rod drives the expansion joint to extend and the motor drives the rope to ensure that the length of the expansion joint is fixed after expansion, and each expansion joint extends completely. The anchor bolt clamp ensures the relative position of the grouting anchor bolt in the soil layer and the orientation of the expansion joint during construction, simplifying the construction difficulty and ensuring the standardization of construction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the first structure of the anchor body of a modular adaptive hollow grouting anchor and anchor clamp proposed in this invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the anchor bolt body in this invention; Figure 3 This is a schematic diagram of the second structure of the anchor bolt body in this invention; Figure 4 for Figure 2 A schematic diagram of the structure at center A; Figure 5 for Figure 3 Enlarged schematic diagram of the structure at point B; Figure 6This is a schematic diagram of the first structure of the anchor clamp in this invention; Figure 7 This is a schematic diagram of the second structure of the anchor clamp in this invention; Figure 8 This is a schematic diagram of the clamp end cap and clamp body structure in this invention; Figure 9 This is a schematic diagram of the anchor bolt and anchor bolt clamp structure in this invention; Figure 10 This is a schematic diagram of the linkage assembly structure in this invention; Figure 11 This is a schematic diagram of the pull plate structure in this invention; Figure 12 This is a schematic diagram of the handwheel structure in this invention.

[0017] In the diagram: Anchor bolt section 1-1, Anchor bolt head 1-2, Pad 1-3, Fastening nut 1-4, Grout stop plug 1-5, Outer sleeve 2-1, First expansion joint 2-2-1, Second expansion joint 2-2-2, Third expansion joint 2-2-3, Fourth expansion joint 2-2-4, Telescopic head 2-2-5, First connecting rod 2-3-1, Second connecting rod 2-3-2, Third connecting rod 2-3-3, Fourth connecting rod 2-3-4, Third set screw 2-4, Pull rope 3-1, Pull plate 3-2, Clamp base 4-1, Clamp end cap 4-2, Clamp body 4-3, Handwheel 4-4, Support leg 4-5, Push rod 4-6, Handle 4-7, Connecting rod 4-8, Wire rope tensioning motor 4-9, Scale plate 4-10, Top plate 4-11, Screw 4-12, First set screw 4-13, Second set screw 4-14. Detailed Implementation

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example like Figure 1 - Figure 12 As shown, the present invention proposes a modular adaptive hollow grouting anchor bolt and anchor bolt clamp, including an anchor bolt body, which includes multiple anchor bolt sections 1-1. The outer side of the middle part of the anchor bolt section 1-1 is provided with threads, and its outer wall is provided with grouting holes communicating with the inner diameter. Two adjacent anchor bolt sections 1-1 are threadedly connected. Each of the multiple anchor bolt sections 1-1 is provided with a telescopic assembly on its outer side. The telescopic assembly includes a telescopic joint structure and a connecting rod structure. The telescopic joint structure is used to support the anchor bolt section 1-1, and the connecting rod structure is used to drive the telescopic joint structure.

[0020] The anchor bolt body also includes a pad 1-3 sleeved on the outside of the anchor bolt section 1-1. The bottom of the pad 1-3 is provided with a grout stop plug 1-5 sleeved on the outside of the anchor bolt section 1-1. The top of the pad 1-3 is fitted with a fastening nut 1-4 that is threaded to the anchor bolt section 1-1. The tail of the anchor bolt section 1-1 is threaded to the outside of the anchor bolt head 1-2. The middle section of the anchor bolt head 1-2 is provided with a boss. like Figure 1 and Figure 2 As shown, the main body of the anchor bolt consists of anchor bolt section 1-1, anchor bolt head 1-2, pad 1-3, fastening nut 1-4, and grout stop plug 1-5. Anchor bolt section 1-1 is connected to the next anchor bolt section 1-1 by threads, and the last anchor bolt section 1-1 is connected to the anchor bolt head 1-2 by threads. Grout stop plug 1-5 is in contact with the borehole. Pad 1-3 is in contact with both the ground and grout stop plug 1-5. Fastening nut 1-4 is threaded to anchor bolt section 1-1 and is in contact with pad 1-3. Furthermore, the outer wall of the anchor bolt section 1-1 is provided with a grouting hole that communicates with the inner diameter, and its front end is provided with a boss hole with a thread inside, and the rear end is provided with a stepped hole with a thread on the outer wall. The boss hole and the stepped hole of two adjacent anchor bolt sections 1-1 are connected by threads. The outer surface of the anchor bolt section 1-1 is provided with threads. The anchor bolt section 1-1 is connected to the anchor head 1-2, the anchor bolt section 1-1 is connected to the pad 1-3, the anchor bolt section 1-1 is connected to the fastening nut 1-4, and the anchor bolt section 1-1 is connected to the grout stop plug 1-5. Two adjacent anchor bolt sections 1-1 form a detachable connection.

[0021] The expansion joint structure includes an outer sleeve 2-1. Threaded holes are provided through the outer walls of both the outer sleeve 2-1 and the anchor rod section 1-1. Set screws 2-4 are threadedly connected to the outer sleeve 2-1 and the anchor rod section 1-1. The threaded connection between the outer sleeve 2-1 and the anchor rod section 1-1 is provided. Multiple sets of cylindrical boss holes are evenly spaced at the middle section of the outer wall of the outer sleeve 2-1. The expansion joint structure is located on the inner wall of the cylindrical boss holes. The telescopic joint structure includes a first telescopic joint 2-2-1, which is threadedly connected to the outer sleeve 2-1. The inner side of the first telescopic joint 2-2-1 is sequentially slidably provided with a second telescopic joint 2-2-2, a third telescopic joint 2-2-3, a fourth telescopic joint 2-2-4, and a telescopic head 2-2-5. The linkage structure includes a first connecting rod 2-3-1, one end of which is threadedly connected to the end of the telescopic head 2-2-5, and the other end of which is rotatably connected to a second connecting rod 2-3-2. The second connecting rod 2-3-2 and the outer sleeve 2-1 are rotatably connected to a third telescopic joint 2-3-3. The end of the anchor bolt section 1-1 is slidably provided with a pull plate 3-2, and the pull plate 3-2 and the third telescopic joint 2-3-3 are rotatably connected to a fourth telescopic joint 2-3-4. A pull rope 3-1 is installed among the multiple pull plates 3-2. The movement of the pull rope 3-1 is used to drive the extension of the linkage structure, and the linkage structure drives the telescopic joint structure to unfold. like Figure 2 and Figure 4 As shown, the telescopic joint structure is further composed of an outer sleeve 2-1, a first telescopic joint 2-2-1, a second telescopic joint 2-2-2, a third telescopic joint 2-2-3, a fourth telescopic joint 2-2-4, and a telescopic head 2-2-5. The connecting rod structure is composed of a connecting rod 2-3-1, connecting rods 2-3-2, 2-3-3, 2-3-4, and a set screw 2-4.

[0022] Furthermore, the outer wall of the outer sleeve 2-1 is provided with multiple sets of cylindrical boss holes evenly spaced at the middle section. Ribs are provided between the boss holes and the outer wall of the outer sleeve 2-1, and the ribs have smooth holes. The inner wall of the outer sleeve 2-1 is threaded, and the outer sleeve 2-1 is connected to the anchor rod section 1-1 via these threads. The relative position of the outer sleeve 2-1 and the anchor rod section 1-1 is positioned by the third set screw 2-4. The wall shape of the telescopic joint 2-2-1 is Z-shaped, and its outer surface is threaded. The outer diameter of the rear boss of each telescopic joint is equal to the inner diameter of the front boss of the previous telescopic joint. The first telescopic joint 2-2-1 is connected to the outer sleeve 2-1 via threads. The first telescopic joint 2-2-1, the second telescopic joint 2-2-2, the third telescopic joint 2-2-3, the fourth telescopic joint 2-2-4, and the telescopic head 2-2-5 are nested together (coaxial). Furthermore, the outer diameter of the rear boss of the expansion joint 2-2-1 is the same as the inner diameter of the boss hole on the outer wall of the outer sleeve 2-1. The expansion head 2-2-5 is a cylindrical boss with a threaded front end. The boss hole on the outer wall of the outer sleeve 2-1 is coaxially fitted with the hole on the outer wall of the anchor rod section 1-1. The outer sleeve 2-1 and the expansion joint 2-2-1 are threaded together, and the rear boss of the first expansion joint 2-2-1 contacts the outer wall of the anchor rod section 1-1 to form a limit. Each level of expansion joint and the expansion head 2-2-5 form a nested fit, and each level of expansion joint contacts the outer wall of the anchor rod section 1-1 to form a limit. The set screw 2-4 is connected to the threaded hole on the outer wall of the outer sleeve 2-1 and contacts the outer wall of the anchor rod section 1-1 to form a limit.

[0023] Furthermore, one end of connecting rod 2-3-1 has a threaded hole, and the other end has a smooth hole, with the two holes perpendicular to each other. Both ends of connecting rods 2-3-2 and 2-3-4 have a "convex" and a "concave" structure, with smooth holes at both structures. Both ends of connecting rod 2-3-3 have "concave" structures and smooth holes. The middle section of the connecting rod is thinner than the front and rear ends and has smooth holes. The inner diameter of the pull plate 3-2 is larger than the outer diameter of the anchor rod section 1-1, and its outer wall surface is evenly spaced with "concave" shaped bosses, with the spacing between them corresponding to the cylindrical boss holes on the outer wall of the outer sleeve 2-1. With the same spacing, a light hole is provided on the protruding part of the pull plate 3-2. The diameter of the light holes on the "U"-shaped structure in the above structure is slightly smaller than the light holes in the "U"-shaped part and the middle section of the connecting rod 2-3-2. The threaded hole of the connecting rod 2-3-1 forms a threaded connection with the telescopic head 2-2-5. The light hole at the other end is connected to the connecting rod 2-3-2 by a pin to form a rotating pair. All connecting rods and the "U"-shaped structure of the pull plate 3-2 are connected by pins to form a rotating pair. The surface of the connecting rod 2-3-1 with a threaded hole should contact the outer surface of the front boss of each telescopic joint to form a limit.

[0024] The connecting rod 2-3-1 is connected to the telescopic head 2-2-5 by a thread. The connecting rod 2-3-1 is connected to the connecting rod 2-3-2 by a pin. The connecting rods 2-3-2, 2-3-3, 2-3-4, the outer sleeve 2-1 and the pull plate 3-2 are all connected by pins. The pull rope 3-1 passes through the hole in the pull plate 3-2 and is bound to the hole.

[0025] A modular adaptive hollow grouting anchor bolt fitting includes a fitting base 4-1, a wire tension motor 4-9 mounted on the fitting base 4-1, a fitting body 4-3 slidably disposed on the inner side of the fitting base 4-1, a scale plate 4-10 mounted on the fitting base 4-1, a top plate 4-11 mounted on the scale plate 4-10, a push rod 4-6 fixedly connected to the outer side of the fitting body 4-3, a handle 4-7 rotatably connected to the fitting base 4-1, and a connecting rod 4-8 rotatably connected between the handle 4-7 and the push rod 4-6. A rope tension motor 4-9 is installed on the clamp base 4-1. The rope 3-1 passes through the clamp base 4-1 and the clamp end cover 4-2. The output end of the rope tension motor 4-9 is connected to the rope 3-1. Multiple handwheels 4-4 are threaded on the clamp base 4-1. The bottom of the handwheels 4-4 is threaded with a support foot 4-5. like Figure 6 , Figure 7 , Figure 8As shown, the anchor bolt clamp mainly consists of a clamp base 4-1, a clamp end cap 4-2, a clamp body 4-3, a handwheel 4-4, a support leg 4-5, a push rod 4-6, a handle 4-7, a connecting rod 4-8, a motor 4-9, a scale plate 4-10, a top plate 4-11, screws 4-12, set screws 4-13 and 4-14. Furthermore, the clamp body 4-3 is placed in the groove of the clamp base 4-1. The other end of the clamp body 4-3 is connected to the push rod 4-6 by threads. The push rod 4-6, handle 4-7, connecting rod 4-8 and clamp base 4-1 are all connected by pins. The clamp base 4-1 and clamp end cover 4-2 are connected by screws. The handwheel 4-4 is connected to the clamp base 4-1 by threads. The handwheel 4-4 and the support leg 4-5 are connected by threads. The motor 4-9 is connected to the clamp base 4-1 by screws. The scale plate 4-10 and the top plate 4-11 are connected by grooves. The scale plate 4-10 and the clamp base 4-1 are positioned by set screws. The scale plate 4-10 and the top plate 4-11 are positioned by set screws.

[0026] The implementation method of assembling grouting anchor bolts and anchor bolt clamps is as follows: Figure 9 As shown, when the grouting anchor bolt and anchor bolt clamp are engaged, the clamp base 4-1 and clamp body 4-3 clamp the grouting anchor bolt. The pull rope 3-1 passes through the motor 4-9. The pull rope 3-1 passes through all the holes of the protruding parts of the pull plates 3-2 inside the hollow grouting anchor bolt from bottom to top, and forms a knot at the first hole it passes through. It passes through the other holes only twice. This ensures that the force of the pull rope 3-1 under tension can be transmitted to each section of the pull plate.

[0027] In this embodiment, the grouting soil and the location of the anchor bolt holes on the supporting slope are first determined, and the drilling rig is started. By controlling the drilling depth, a high-pressure water gun is used to enlarge the hole at the target depth, forming different enlarged sections according to actual needs. The hole is then cleaned. Then, hollow grouting anchor bolts of appropriate length are assembled according to actual needs. The height of the top plate 4-11 is adjusted according to design requirements. The anchor bolt clamp is matched with the grouting anchor bolt so that the top of the grouting anchor bolt is in contact with the top plate 4-11. The handle 4-7 is pulled up to clamp the grouting anchor bolt between the clamp base 4-1 and the clamp body 4-3. The grouting anchor bolt is placed in the drill hole, and the support leg 4-5 is made in contact with the ground. Touch, adjust the handwheel 4-4 of the anchor bolt clamp to change the position of the support foot 4-5 so that the clamp base 4-1 is horizontal, vertically pass the pull rope 3-1 through the anchor bolt clamp and connect it to the motor 4-9, start the motor 4-9 to pull the pull rope 3-1, pull plate 3-2 pushes the connecting rod to extend, under the drive of connecting rod 2-3-1, each expansion joint unfolds from the inside to the outside in sequence until the expansion joint is fully unfolded, remove the top plate 4-11, connect the grouting pipe to the grouting pump truck and put the grouting pipe into the grouting anchor bolt to start grouting, finally forming the grouting consolidation section, remove the anchor bolt clamp, install the pad 1-3, fastening nut 1-4 and grout stop plug 1-5, and apply pre-tightening force to the grouting anchor bolt.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A modular adaptive hollow grouting anchor bolt, comprising an anchor bolt body, characterized in that, The anchor bolt body includes multiple anchor bolt sections (1-1). The middle part of each anchor bolt section (1-1) is threaded on the outer side, and its outer wall is provided with a grouting hole communicating with the inner diameter. Two adjacent anchor bolt sections (1-1) are threaded together. Each of the multiple anchor bolt sections (1-1) is provided with a telescopic assembly on its outer side. The telescopic assembly includes a telescopic joint structure and a connecting rod structure. The telescopic joint structure is used to support the anchor bolt section (1-1), and the connecting rod structure is used to drive the telescopic joint structure.

2. The modular adaptive hollow grouting anchor bolt according to claim 1, characterized in that, The anchor bolt body also includes a pad (1-3) sleeved on the outside of the anchor bolt section (1-1). The bottom of the pad (1-3) is provided with a grout stop plug (1-5) sleeved on the outside of the anchor bolt section (1-1). The top of the pad (1-3) is fitted with a fastening nut (1-4) for threaded connection of the anchor bolt section (1-1). The tail of the anchor bolt section (1-1) is threadedly connected to an anchor bolt head (1-2). The middle section of the anchor bolt head (1-2) is provided with a boss.

3. The modular adaptive hollow grouting anchor bolt according to claim 1, characterized in that, The expansion joint structure includes an outer sleeve (2-1), and the outer sleeve (2-1) is threadedly connected to the anchor rod section (1-1) with a set screw (2-4). The connecting outer sleeve (2-1) and the anchor rod section (1-1) are threadedly connected. The outer wall of the outer sleeve (2-1) is provided with multiple sets of cylindrical boss holes evenly spaced at the middle position. The expansion joint structure is set on the inner wall of the cylindrical boss holes.

4. A modular adaptive hollow grouting anchor bolt according to claim 1, characterized in that, The telescopic joint structure includes a first telescopic joint (2-2-1), which is threadedly connected to the outer sleeve (2-1). The inner side of the first telescopic joint (2-2-1) is sequentially provided with a second telescopic joint (2-2-2), a third telescopic joint (2-2-3), a fourth telescopic joint (2-2-4), and a telescopic head (2-2-5).

5. A modular adaptive hollow grouting anchor bolt according to claim 1, characterized in that, The linkage structure includes a first connecting rod (2-3-1), one end of which is threadedly connected to the end of the telescopic head (2-2-5), and the other end of which is rotatably connected to a second connecting rod (2-3-2). The second connecting rod (2-3-2) and the outer sleeve (2-1) are rotatably connected to a third telescopic joint (2-3-3). The end of the anchor bolt section (1-1) is slidably provided with a pull plate (3-2), and the pull plate (3-2) and the third telescopic joint (2-3-3) are rotatably connected to a fourth telescopic joint (2-3-4). A pull rope (3-1) is installed among the multiple pull plates (3-2), and the movement of the pull rope (3-1) is used to drive the linkage structure to extend.

6. A matching clamp for a modular adaptive hollow grouting anchor bolt, applied to a modular adaptive hollow grouting anchor bolt as described in any one of claims 1 to 5, characterized in that, The fixture includes a clamp base (4-1), a clamp body (4-3) slidably disposed on the inner side of the base (4-1), a rope tension motor (4-9) mounted on the clamp base (4-1), a scale plate (4-10) mounted on the clamp base (4-1), a top plate (4-11) mounted on the scale plate (4-10), a push rod (4-6) fixedly connected to the outer side of the clamp body (4-3), a handle (4-7) rotatably connected to the clamp base (4-1), and a connecting rod (4-8) rotatably connected between the handle (4-7) and the push rod (4-6).

7. The matching clamp for a modular adaptive hollow grouting anchor bolt according to claim 6, characterized in that, A rope tension motor (4-9) is installed on the clamp base (4-1). The pull rope (3-1) passes through the clamp base (4-1) and the clamp end cap (4-2). The output end of the rope tension motor (4-9) is connected to the pull rope (3-1). Multiple handwheels (4-4) are threaded on the clamp base (4-1). The bottom of each handwheel (4-4) is threaded with a support foot (4-5).

8. A method for using a modular adaptive hollow grouting anchor and its matching clamp, comprising the matching clamp of the modular adaptive hollow grouting anchor as described in claim 6, characterized in that, Includes the following steps: S1: First, locate the grouting soil and the anchor drilling positions on the slope surface, and start drilling. Control the drilling depth and use a high-pressure water gun to enlarge the hole at the target depth. Form different enlarged sections according to actual needs and clean the hole. S2: Then install the telescopic assembly in the designated position, connect the head and tail threads of multiple anchor bolt sections (1-1) of appropriate length and assemble them. Then place the installed anchor bolt section (1-1) into the borehole, put the clamp assembly on the outside of the anchor bolt section (1-1) extending out of the ground, adjust the height of the top plate (4-11) according to the design requirements, so that the top of the anchor bolt section (1-1) is close to the top plate (4-11), pull up the handle (4-7) to clamp the grouting anchor bolt between the clamp base (4-1) and the clamp body (4-3); S3: Make the outrigger (4-5) contact the ground, adjust the handwheel (4-4) of the anchor bolt clamp to change the position of the outrigger (4-5) so that the clamp base (4-1) is horizontal, vertically pass the pull rope (3-1) through the anchor bolt clamp and connect it to the rope tension motor (4-9), start the rope tension motor (4-9) to pull the pull rope (3-1), and the pull plate (3-2) pushes the connecting rod structure to extend. Under the drive of the first connecting rod (2-3-1), each expansion joint unfolds from the inside to the outside in sequence until the expansion joint structure is fully unfolded. Remove the top plate (4-11). S4: Connect the grouting pipe to the grouting pump truck and put the grouting pipe into the grouting anchor rod to start grouting. Finally, a grouting consolidation section is formed. Remove the clamp assembly, install the pad (1-3), fastening nut (1-4) and grout stop plug (1-5), and rotate the fastening nut (1-4) to apply pre-tightening force to the grouting anchor rod.

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