Hollow internal injection type anchor rod for anchoring and anchoring construction method

Abstract

The invention relates to a hollow inner injection type anchor rod for anchoring and an anchoring construction method.The anchor rod comprises a hollow rod body, outflow holes are formed in the side wall of the hollow rod body, a resin anchoring agent is arranged in the hollow rod body, a connecting hole is formed in the front end of a packaging film of the resin anchoring agent, and a piston in sliding fit with the hollow rod body is arranged on the rear side of the resin anchoring agent; the front side of the hollow rod body is connected with a drill bit, the front end of the drill bit is provided with a packaging cover, a spring shaft coaxially connected with the packaging cover is arranged in the drill bit, a spring is installed between the spring shaft and the drill bit, the rear end of the spring shaft is connected with a collecting wheel, and a connecting rope is arranged in the collecting wheel. The other end of the connecting rope is connected with a packaging film of a resin anchoring agent through the connecting hole; in the initial state, energy is stored for the clockwork spring so that the connecting rope can tension the packaging film of the resin anchoring agent. During construction, the piston is used for cutting the packaging film, and the packaging film is torn down through the collecting wheel, so that the reaction quality of the subsequent resin anchoring agent is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anchoring, and in particular to a hollow inner-injection anchor rod for anchoring and an anchoring construction method. Background Art

[0002] Anchor rods are a type of tension rod structure for structural anchoring or rock and soil reinforcement, and are divided into prestressed anchor rods and non-prestressed anchor rods. Prestressed anchor rods are an active support type that can transfer tension to stable or suitable rock and soil, thereby anchoring the structure to the rock and soil or reinforcing the rock and soil. Non-prestressed anchor rods are a passive support type that reinforces the rock and soil by deforming together with the rock and soil. Anchor support has been widely used in tunnels and underground projects, slopes, foundation pits and other projects. Anchor support is an important part of anchor-spray support, which improves the support efficiency of surrounding rock, optimizes the load-bearing ratio of various supports, ensures the safety of engineering construction, and saves engineering costs.

[0003] The resin anchor is composed of two parts, resin cement and curing agent, which are packaged separately into rolls. After mixing, the anchor rod body can be bonded to the rock and soil. When the current hollow internal injection anchor is used with the resin anchor, the resin anchor packaging film needs to be broken. Once the packaging film is not broken sufficiently, there will be construction risks. Summary of the invention

[0004] In view of the above problems, the present invention proposes a hollow inner injection anchor rod for anchoring and an anchoring construction method, and the specific technical scheme is as follows: A hollow internal injection anchor rod for anchoring comprises a hollow rod body, a flow out hole is provided on the side wall of the hollow rod body, a resin anchor is provided in the hollow rod body, a front end of a packaging film of the resin anchor is provided with a connecting hole, a piston which is slidably matched with the hollow rod body is provided on the rear side of the resin anchor, a cutting portion which can cut the packaging film when in contact with the resin anchor is provided on the front end of the piston, a drill bit is connected to the front side of the hollow rod body, a packaging cover is provided at the front end of the drill bit, a spring shaft which is coaxially connected to the packaging cover is arranged in the drill bit, a spring spring is installed between the spring shaft and the drill bit, a collecting wheel is connected to the rear end of the spring shaft, a connecting rope is provided in the collecting wheel, and the other end of the connecting rope is connected to the packaging film of the resin anchor through the connecting hole; in the initial state, the spring spring stores energy so that the connecting rope can tighten the packaging film of the resin anchor.

[0005] Furthermore, an elastic buckle is provided at the rear end of the piston, a groove is provided on the front inner wall of the hollow rod body, the outflow hole is arranged at the front side of the resin anchor, and the groove is arranged at the rear side of the outflow hole. The elastic buckle can expand and embed into the groove when reaching the groove.

[0006] Furthermore, the cutting portion is in a pointed cone shape or a blade shape.

[0007] Furthermore, a fragile band is provided on the rear end of the packaging film of the resin anchor.

[0008] Furthermore, a contraction platform is provided at the front end of the inner wall of the hollow rod body, a conical collecting hole is opened in the contraction platform, and a connecting rope passes through the collecting hole to connect the packaging film of the resin anchor and the collecting wheel.

[0009] Furthermore, the connecting rope is made of elastic material.

[0010] Furthermore, a stirring thread is provided on the front outer wall of the hollow rod body, a slurry stopper is provided on the middle outer wall of the hollow rod body, a nut is provided on the rear outer wall of the hollow rod body, and a gasket is provided at the front end of the nut.

[0011] An anchoring construction method includes the above-mentioned hollow inner injection anchor rod for anchoring, and the construction includes the following steps: S1. Drilling: Drilling holes in rock and soil using a drilling device; S2. Installation: Push the resin anchor rod to the bottom of the drill hole in the rock layer through the anchor rod trolley; S3, extrusion stirring: applying gas injection pressure through the anchor trolley, pushing the piston until the elastic buckle is engaged with the groove, and then rotating the anchor through the anchor trolley to stir the outflowing resin anchoring agent; S4. Place the gasket on the upper end face of the drilled hole to fit it with the rock and soil layer, and tighten the nut to apply prestress.

[0012] The beneficial effects of the present invention are: The entire resin anchor is wrapped inside to avoid the risk of the resin anchor packaging film sliding when placed; before stirring the resin anchor, the entire packaging film is collected by a clockwork spring and a collecting wheel to avoid the problem of insufficient reaction caused by the packaging film not being completely broken during stirring, thereby reducing construction safety hazards and improving construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 It is a structural schematic diagram of a hollow inner injection type anchor rod for anchoring according to the present invention; Figure 2 It is a partial cross-sectional schematic diagram of a hollow internal injection type anchor rod for anchoring according to the present invention; Figure 3 Schematic diagram of the piston of the present invention.

[0015] In the figure: 1. rock and soil layer; 2. nut; 3. gasket; 4. slurry stopper; 5. hollow rod body; 51. stirring thread; 52. groove; 53. outflow hole; 6. drill bit; 7. piston; 71. elastic buckle; 72. cutting part; 8. resin anchor; 81. fragile belt; 82. connecting hole; 83. packaging film; 9. connecting rope; 10. retracting platform; 11. collecting wheel; 12. spring shaft; 13. spring spring; 14. packaging cover. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0017] It should be noted that the “front end” in the following description refers to the end close to the bottom of the hole, and the “rear end” refers to the end away from the bottom of the hole. The present invention provides the following specific implementation schemes: like Figure 1-3As shown, the present invention provides a hollow internal injection anchor rod for anchoring, comprising a hollow rod body 5, a side wall of the hollow rod body 5 is provided with an outflow hole 53 for discharging a curing agent and resin cement of a resin anchor 8, a resin anchor 8 is arranged in the hollow rod body 5, a front end of a packaging film 83 of the resin anchor 8 is provided with a connecting hole 82, a rear side of the resin anchor 8 is provided with a piston 7 which is slidably matched with the hollow rod body 5, a front end of the piston 7 is provided with a cutting portion 72 which can cut the packaging film 83 when in contact with the resin anchor 8, a drill bit 6 is connected to the front side of the hollow rod body 5 by a thread, a rotatable packaging cover 14 is provided at the front end of the drill bit 6, and a sealing cover 14 which is rotatable with the packaging cover 14 is arranged in the drill bit 6 The cover 14 is coaxially connected to the clockwork shaft 12, a clockwork spring 13 is installed between the clockwork shaft 12 and the drill bit 6, the rear end of the clockwork shaft 12 is connected to the collecting wheel 11, the collecting wheel 11 is provided with a collecting groove, the collecting wheel 11 is provided with a connecting rope 9, one end of the connecting rope 9 is fixedly connected in the collecting groove, and the other end of the connecting rope 9 is connected to the packaging film 83 of the resin anchor 8 through the connecting hole 82; in the initial state, the rotating packaging cover 14 stores energy for the clockwork spring 13 so that the connecting rope 9 can tighten the packaging film 83 connected to the resin anchor 8; after the piston 7 is pushed forward, the packaging film 83 is cut, the material tension disappears, the stored energy of the clockwork spring 13 is released and the packaging film 83 is torn off.

[0018] Preferably, an elastic clip 71 is provided at the rear end of the piston 7, a groove 52 is provided on the front inner wall of the hollow rod body 5, the outflow hole 53 is arranged on the front side of the resin anchor 8, and the groove 52 is arranged on the rear side of the outflow hole 53. The elastic clip 71 can expand and embed into the groove 52 when reaching the groove 52 to prevent the outflowing resin anchor 8 from flowing back.

[0019] Preferably, the cutting portion 72 is in a pointed cone shape or a blade shape. In addition, other structural members that are easy to cut the resin anchor 8 packaging film 83 can also be used as the cutting portion 72.

[0020] Preferably, a fragile band 81 is provided on the rear end of the packaging film 83 of the resin anchor 8, so that the packaging film 83 can be more easily destroyed.

[0021] Preferably, a retraction platform 10 is provided at the front end of the inner wall of the hollow rod body 5, and a conical collecting hole is opened in the retraction platform 10. The connecting rope 9 passes through the collecting hole to connect the packaging film 83 of the resin anchor 8 and the collecting wheel 11. After the packaging film 83 is torn off, the collecting hole can be blocked to prevent the resin anchor 8 from entering the interior of the drill bit 6, so that the resin anchor 8 can be more fully utilized.

[0022] Preferably, the connecting rope 9 is made of elastic material to prevent the connecting rope 9 from being torn during connection.

[0023] Preferably, a stirring thread 51 for stirring the resin anchor 8 is provided on the front outer wall of the hollow rod body 5, a slurry stopper 4 for preventing the resin anchor 8 from flowing back is provided on the middle outer wall of the hollow rod body 5, a nut 2 is provided on the rear outer wall of the hollow rod body 5, and a gasket 3 is provided at the front end of the nut 2. After the anchor rod touches the bottom of the hole, the nut 2 and the gasket 3 are used to apply prestress.

[0024] In a second aspect, the present invention provides an anchoring construction method, comprising the above-mentioned hollow inner injection anchor rod for anchoring, and the construction comprises the following steps: S1. Drilling: Drilling a hole in the rock and soil layer 1 using a drilling device.

[0025] S2. Installation: Push the hollow internal injection anchor filled with resin anchoring agent to the bottom of the drill hole in the rock layer 1 by the anchor trolley.

[0026] S3, extrusion stirring: applying gas injection pressure through the anchor trolley to push the piston 7 until the elastic buckle 71 is engaged with the groove 52, and then the anchor is rotated by the anchor trolley to stir the resin anchoring agent 8 that has flowed out. The specific steps are as follows: S3.1, extrusion: apply gas injection pressure through the anchor trolley to push the piston 7 to move, contact and squeeze the resin anchor 8, so that the packaging film 83 is separated from the fragile belt 81; after the packaging film 83 is broken, the dynamic balance disappears, the clockwork spring 13 releases the elastic energy storage, drives the collecting wheel 11 to rotate, and then quickly gathers the broken packaging film 83 through the connecting rope 9, so that the packaging film 83 and the internal mastic material are quickly and effectively separated; then the packaging film 83 accumulates in the borehole to block the collecting hole, so that the anchoring material of the resin anchor 8 is completely discharged into the rock and soil layer 1; continue to push the piston 7 to discharge the resin anchor 8 through the outflow hole 53; when the piston 7 is pushed to a certain extent, the elastic buckle 71 at its rear end will be embedded in the groove 52 to prevent the resin anchor 8 from flowing back; S3.2, rotation: the anchor is rotated by the anchor trolley, so that the drill bit 6 and the hollow rod body 5 stir the resin anchor 8, and the stirring is stopped after a certain period of time and the resin cement and curing agent of the resin anchor 8 are allowed to react to produce an anchoring effect.

[0027] S4. Place the gasket 3 on the upper end surface of the drilled hole to fit it with the rock and soil layer 1, and tighten the nut 2 to apply prestress.

[0028] The entire resin anchor 8 is wrapped inside, avoiding the risk of the packaging film 83 of the resin anchor 8 sliding down when placed; before stirring the resin anchor 8, the entire packaging film 83 is collected by the clockwork spring 13 and the collecting wheel 11, avoiding the problem of insufficient reaction caused by the packaging film 83 not being completely broken during stirring, thereby reducing the construction safety hazards and improving the construction quality.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A hollow inner injection anchor rod for anchoring, characterized in that: The invention comprises a hollow rod body (5), a flow hole (53) is provided on the side wall of the hollow rod body (5), a resin anchoring agent (8) is provided in the hollow rod body (5), a connection hole (82) is provided at the front end of a packaging film (83) of the resin anchoring agent (8), a piston (7) which is slidably matched with the hollow rod body (5) is provided at the rear side of the resin anchoring agent (8), a cutting portion (72) which can cut the packaging film (83) when in contact with the resin anchoring agent (8) is provided at the front end of the piston (7), a drill bit (6) is connected to the front side of the hollow rod body (5), and a packaging portion (83) is provided at the front end of the drill bit (6). A cover (14) is provided inside the drill bit (6), a clockwork shaft (12) coaxially connected to the packaging cover (14) is arranged inside the drill bit (6), a clockwork spring (13) is installed between the clockwork shaft (12) and the drill bit (6), a collection wheel (11) is connected to the rear end of the clockwork shaft (12), a connecting rope (9) is arranged inside the collection wheel (11), and the other end of the connecting rope (9) is connected to the packaging film (83) of the resin anchor (8) through a connecting hole (82); in the initial state, the clockwork spring (13) stores energy so that the connecting rope (9) can tighten the packaging film (83) of the resin anchor (8).

2. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: The rear end of the piston (7) is provided with an elastic buckle (71), the front inner wall of the hollow rod body (5) is provided with a groove (52), the outflow hole (53) is arranged on the front side of the resin anchoring agent (8), the groove (52) is arranged on the rear side of the outflow hole (53), and the elastic buckle (71) can expand and embed into the groove (52) when reaching the groove (52).

3. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: The cutting portion (72) is in the shape of a pointed cone or a blade.

4. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: A fragile band (81) is provided on the rear end of the packaging film (83) of the resin anchoring agent (8).

5. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: A contraction platform (10) is provided at the front end of the inner wall of the hollow rod body (5), a conical collecting hole is provided in the contraction platform (10), and a connecting rope (9) passes through the collecting hole to connect the packaging film (83) of the resin anchoring agent (8) and the collecting wheel (11).

6. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: The connecting rope (9) is made of elastic material.

7. The hollow inner injection anchor rod for anchoring according to claim 1, characterized in that: A stirring thread (51) is provided on the front outer wall of the hollow rod body (5), a slurry stopper (4) is provided on the middle outer wall of the hollow rod body (5), a nut (2) is provided on the rear outer wall of the hollow rod body (5), and a gasket (3) is provided at the front end of the nut (2).

8. An anchoring construction method, characterized in that: The hollow cast-in-place anchor rod for anchoring according to any one of claims 1 to 7 is constructed by: S1. Drilling: drilling a hole in the rock layer (1) using a drilling device; S2, installation: pushing the resin anchor rod to the bottom of the drill hole in the rock layer (1) by using the anchor rod trolley; S3, extrusion stirring: applying gas injection pressure through the anchor trolley to push the piston (7) until the elastic buckle (71) is engaged with the groove (52), and then the anchor is rotated by the anchor trolley to stir the resin anchoring agent that has flowed out; S4. Place the gasket (3) on the upper end surface of the drilled hole so that it fits the rock layer (1), and tighten the nut (2) to apply prestress.

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