A working method of a hollow grouting anchor rod with slidable pop-out barbs

Abstract

This invention discloses a method for operating a hollow grouting anchor bolt with slidable pop-out barbs, comprising: placing the anchor bolt at a suitable position in the borehole; the anchor bolt including an outer sleeve and slidable pop-out barbs installed inside the outer sleeve; the slidable pop-out barbs including multiple scissor-shaped barbs; the inner wall of the outer sleeve having several sets of grooves corresponding to the number of barbs; a steel wire rope connected to the tail of the slidable pop-out barb, the tail of the steel wire rope extending outside the outer sleeve; pulling the steel wire rope, the tail of the barb moves within the groove, the tail of the barb sliding out and opening, so that the tail of the barb supports the borehole wall and fixes the steel wire rope; grouting is performed in the borehole, so that the anchor bolt, grout body, and surrounding rock form an integral load-bearing structure. The advantage of this invention is that by pulling the slidable pop-out barbs inside the outer sleeve, each barb on the slidable pop-out barb extends through the opening in the outer sleeve to the outside of the outer sleeve, and the barbs support the borehole wall, thereby achieving the anchoring effect of the anchor bolt.

Description

Technical Field

[0001] This invention belongs to the technical field of anchor bolts, specifically relating to a working method for a hollow grouting anchor bolt with a sliding, pop-out barb. Background Technology

[0002] Anchor bolts are widely used in tunnel and slope engineering, providing reinforcement through the bond between the bolt body and the surrounding soil and rock. Currently, most anchor bolts have simple constructions, relying solely on the bond between the bolt body and the surrounding soil and rock to provide anchoring force. When significant displacement occurs in the soil and rock mass, the anchor bolt is prone to slippage, leading to weakened anchoring or even failure.

[0003] Therefore, a working method for a hollow grouting anchor bolt with a sliding pop-out barb that can solve the above problems is needed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a working method for a hollow grouting anchor bolt with slidable pop-out barbs. By pulling the slidable pop-out barbs inside the outer sleeve, each barb on the slidable pop-out barb extends through the opening on the outer sleeve to the outside of the outer sleeve, and the barbs support the borehole wall, thereby achieving the anchoring effect of the anchor bolt.

[0005] The objective of this invention is achieved through the following technical solutions:

[0006] A method for operating a hollow grouting anchor bolt with slidable pop-out barbs, characterized in that the method includes the following steps:

[0007] The anchor rod is placed at a suitable position in the borehole; wherein, the anchor rod includes an outer tube and a sliding eject barb installed inside the outer tube, the sliding eject barb includes multiple scissor-shaped barbs, the inner wall of the outer tube is provided with several sets of grooves corresponding to the number of barbs, each set of grooves consists of two oppositely arranged grooves, the grooves are arranged longitudinally, the tail of the groove is provided with an opening, the barb includes two barb assemblies and a rotating shaft, the middle of the two barb assemblies is rotatably connected to the rotating shaft, the heads of the two barb assemblies are connected by a spring, the tails of the two barb assemblies are respectively installed in the corresponding two grooves, the tail of the sliding eject barb is connected to a steel wire rope, the tail of the steel wire rope extends to the outside of the outer tube;

[0008] Pulling the wire rope causes the barbed tail to move within the groove. When the barbed tail slides to the opening at the end of the groove, the wire rope is pulled further, and the barbed tail slides out of the outer sleeve along the opening. At this time, the compressed spring at the barbed head opens, and the barbed tail slides out while opening, so that the barbed tail supports the hole wall of the drilled hole and fixes the wire rope.

[0009] Grouting is performed inside the borehole to form an integral load-bearing structure with the anchor bolt, grout body, and surrounding rock.

[0010] The method for grouting in the borehole is as follows:

[0011] Grouting holes are arranged in a quincunx pattern at the head of the outer casing. Grout is injected into the outer casing through the grouting holes until the borehole is filled with grout.

[0012] The barbs are connected by two longitudinal connecting pieces, and the two longitudinal connecting pieces are respectively connected to the two ends of the rotating shaft of the barb.

[0013] The two longitudinal connecting pieces are connected at their ends by a pin, and the wire rope is connected to the pin.

[0014] Each of the barbs has an arc-shaped positioning slide at each end of its pivot, the shape of which is adapted to the shape of the inner wall of the outer sleeve.

[0015] The advantages of this invention are: it can increase the fixing capacity of the anchor rod, improve the tensile strength, and improve the reinforcement performance of the anchor rod; by pulling the sliding pop-out barbs inside the outer sleeve, each barb on the sliding pop-out barb extends through the opening on the outer sleeve to the outside of the outer sleeve, and the barbs support the hole wall of the drilled hole, thereby realizing the anchoring effect of the anchor rod. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the outer sleeve head of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the tail end of the outer sleeve of the present invention;

[0018] Figure 3 This is a partial schematic diagram of the anchor bolt of the present invention;

[0019] Figure 4 This is a schematic diagram of the sliding pop-out barbs of the present invention. Implementation

[0020] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art:

[0021] like Figure 1-4 As shown in the figure, the markings are respectively: outer tube 1, slide groove 2, opening 3, barb assembly 4, rotating shaft 5, spring 6, wire rope 7, positioning slide 8, longitudinal connecting piece 9, pin 10, grouting hole 11.

[0022] Example: Figure 1-4As shown, this embodiment specifically relates to a working method for a hollow grouting anchor bolt with a slidable pop-out barb, which includes the following steps:

[0023] Place the anchor bolt at the appropriate position in the borehole.

[0024] The anchor bolt includes an outer sleeve 1, a sliding pop-out barb, and a steel wire rope 7. The sliding pop-out barb is installed inside the outer sleeve 1, and the steel wire rope 7 is connected to the tail of the sliding pop-out barb, with the tail of the steel wire rope 7 extending outside the outer sleeve 1. Pulling the steel wire rope 7 causes the sliding pop-out barb to move longitudinally within the outer sleeve 1. The inner wall of the outer sleeve 1 has two sets of sliding grooves 2, each set consisting of two opposing sliding grooves 2 arranged longitudinally. Each sliding groove 2 has an opening 3 at its tail. The sliding pop-out barb includes two scissor-shaped barbs, each corresponding to one of the two sets of sliding grooves 2. Each barb includes two barb assemblies 4 and a rotating shaft 5. The middle of each barb assembly 4 is rotatably connected to the rotating shaft 5. The heads of the two barb assemblies 4 are connected by springs 6, and the tails of the two barb assemblies 4 are respectively installed in the two sliding grooves 2 of the corresponding set of sliding grooves 2, with the tails of the barb assemblies 4 moving along the length of the sliding groove 2.

[0025] The barbs are connected by two longitudinal connecting pieces 9, which are respectively connected to both ends of the barb's rotating shaft 5 to form a whole. The tails of the two longitudinal connecting pieces 9 are connected by a pin 10, and the wire rope 7 is connected to the pin 10 to facilitate pulling and sliding to eject the barbs. Each end of the rotating shaft 5 of each barb is provided with an arc-shaped positioning slide 8. The shape of the positioning slide 8 is adapted to the shape of the inner wall of the outer sleeve 1, which can ensure that the barb is centered in the outer sleeve 1 and slides freely in the longitudinal direction. The head of the outer sleeve 1 has grouting holes 11 arranged in a quincunx pattern to facilitate subsequent grouting operations.

[0026] It should be noted that at this time, the sliding barb is completely inside the outer tube 1, and the spring 6 is in a compressed state, which allows the tail of the barb to be firmly pressed against the slide groove 2. In addition, when the tail of the barb assembly 4 moves into the opening 3 on the slide groove 2, the compressed spring 6 rebounds, allowing the tail of the barb assembly 4 to extend through the opening 3 to the outside of the outer tube 1. The outer edge of the opening 3 is designed with rounded corners to facilitate a smoother sliding of the barb tail out of the outer tube 1.

[0027] Pulling the wire rope 7 causes the longitudinal connecting piece 9 to move via the pin 10. The barb tail slides within the groove 2. When the barb tail slides to the opening 3 at the end of the groove 2, continue pulling the wire rope 7. The barb tail slides out of the outer sleeve 1 along the opening 3. At this time, the compressed spring 6 at the barb head opens, and the barb tail slides out while opening, so that the barb tail is supported on the borehole wall. This effectively anchors the barb tail in the surrounding rock and soil and fixes the wire rope 7.

[0028] Grouting is performed inside the borehole to form an integral load-bearing structure with the anchor bolt, grout, and surrounding rock.

[0029] The method of grouting inside the borehole is as follows:

[0030] Grout is injected into the outer casing 1 through the grouting hole 11 until the borehole is filled with grout. Through the above operation, the grout can fill the borehole faster and more densely.

[0031] The beneficial effects of this embodiment are: it can increase the fixing capacity of the anchor rod, improve the tensile strength, and improve the reinforcement performance of the anchor rod; by pulling the sliding pop-out barbs inside the outer sleeve, each barb on the sliding pop-out barb extends through the opening on the outer sleeve to the outside of the outer sleeve, and the barbs are supported on the hole wall of the drilled hole, thereby realizing the anchoring effect of the anchor rod.

[0032] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A working method for a hollow grouting anchor bolt with slidable pop-out barbs, characterized in that... The working method includes the following steps: The anchor rod is placed at a suitable position in the borehole; wherein, the anchor rod includes an outer tube and a sliding eject barb installed inside the outer tube, the sliding eject barb includes multiple scissor-shaped barbs, the inner wall of the outer tube is provided with several sets of grooves corresponding to the number of barbs, each set of grooves consists of two oppositely arranged grooves, the grooves are arranged longitudinally, the tail of the groove is provided with an opening, the barb includes two barb assemblies and a rotating shaft, the middle of the two barb assemblies is rotatably connected to the rotating shaft, the heads of the two barb assemblies are connected by a spring, the tails of the two barb assemblies are respectively installed in the corresponding two grooves, the tail of the sliding eject barb is connected to a steel wire rope, the tail of the steel wire rope extends to the outside of the outer tube; Pulling the wire rope causes the barbed tail to move within the groove. When the barbed tail slides to the opening at the end of the groove, the wire rope is pulled further, and the barbed tail slides out of the outer sleeve along the opening. At this time, the compressed spring at the barbed head opens, and the barbed tail slides out while opening, so that the barbed tail supports the hole wall of the drilled hole and fixes the wire rope. Grouting is performed inside the borehole to form an integral load-bearing structure with the anchor bolt, grout body, and surrounding rock.

2. The working method of a hollow grouting anchor bolt with slidable pop-out barbs according to claim 1, characterized in that... The method for grouting in the borehole is as follows: Grouting holes are arranged in a quincunx pattern at the head of the outer casing. Grout is injected into the outer casing through the grouting holes until the borehole is filled with grout.

3. The working method of a hollow grouting anchor bolt with slidable pop-out barbs according to claim 1, characterized in that... The barbs are connected by two longitudinal connecting pieces, and the two longitudinal connecting pieces are respectively connected to the two ends of the rotating shaft of the barb.

4. The working method of a hollow grouting anchor bolt with slidable pop-out barbs according to claim 3, characterized in that... The two longitudinal connecting pieces are connected at their ends by a pin, and the wire rope is connected to the pin.

5. The working method of a hollow grouting anchor bolt with slidable pop-out barbs according to claim 1, characterized in that... Each of the barbs has an arc-shaped positioning slide at each end of its pivot, the shape of which is adapted to the shape of the inner wall of the outer sleeve.

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