Hollow internal injection type anchor rod for double-speed resin anchoring agent and anchoring construction method

Abstract

The hollow internal injection type anchor rod comprises a hollow rod body and a drill bit, a first anchoring agent and a second anchoring agent are arranged on the front side and the rear side in the hollow rod body respectively, and an annular groove is formed in the inner wall, on the front side of the first anchoring agent, of the hollow rod body; a first-stage piston and a second-stage piston are arranged on the front side and the rear side of the second anchoring agent correspondingly, and a rubber ring is arranged on the front side of the first-stage piston. The first-stage piston comprises a piston body, a fixed conical head and a movable conical head contracted in the piston body are arranged on the front side and the rear side of the piston body respectively, when the groove and the rubber ring are clamped, the tip end of the movable conical head can eject out of the piston body, and a spring bolt capable of being matched with the annular groove is further arranged in the piston body; and collecting devices for collecting packaging films are arranged in the drill bit and the second-stage piston. According to the construction method, the anchor rod is fed into a drill hole through the anchor rod trolley, the second-stage piston is pushed to move through air pressure, then the anchoring agent packaging film is punctured through the first-stage piston, the packaging film is collected through the collecting device, and the situation that the packaging film influences the anchoring agent reaction is avoided.

Description

Technical Field

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

[0002] Resin anchoring agent is a viscous anchoring adhesive material made of unsaturated polyester resin, curing agent, accelerator and other auxiliary materials in a certain proportion. It is divided and packaged in a roll shape by a film. It can be divided into four types according to the gel time: super fast, fast, medium speed and slow speed. It has excellent properties such as fast curing at room temperature, high bonding strength, reliable anchoring force and good durability. It is the best anchoring material in modern anchoring engineering.

[0003] With the development of anchoring technology, sometimes in order to adapt to special address conditions, it is necessary to use two resin anchors with different reaction rates at the same time. When in use, due to the presence of the resin anchor packaging film, the packaging film needs to be destroyed first to allow the glue and curing agent to react to complete the fixation of the anchor rod. If the packaging film is not completely broken, it will affect the quality of the anchoring construction. To this end, the present invention proposes a hollow inner injection anchor rod for a dual-speed resin anchor and an anchoring construction method. Summary of the invention

[0004] In view of the above problems, the present invention proposes a hollow internal injection anchor rod and an anchoring construction method for a dual-speed resin anchoring agent. The specific technical scheme is as follows: A hollow internal injection anchor rod for a dual-speed resin anchoring agent comprises a hollow rod body and a drill bit arranged at the front end of the hollow rod body, a first anchoring agent and a second anchoring agent with different reaction rates are arranged on the front and rear sides of the hollow rod body respectively, an annular groove is arranged on the inner wall of the hollow rod body on the front side of the first anchoring agent, a primary piston and a secondary piston are arranged on the front and rear sides of the second anchoring agent respectively, a rubber ring installed on the hollow rod body is arranged on the front side of the primary piston, and a hollow rod body side wall between the primary piston and the rubber ring and between the first anchoring agent and the drill bit are provided. Both are provided with channels; the first-stage piston includes a columnar plug body, a groove arranged on the plug body and capable of cooperating with the rubber ring, a wedge-shaped slider is arranged along the radial direction of the groove, and the front and rear sides of the plug body are respectively provided with a fixed cone head protruding from the plug body and a movable cone head retracted in the plug body, the side of the movable cone head cooperates with the wedge-shaped slider, and when the groove is engaged with the rubber ring, the wedge-shaped slider can push the tip of the movable cone head out of the plug body, and a spring pin capable of cooperating with the ring groove is also arranged in the plug body; a collecting device for collecting the anchor packaging film is arranged in the drill bit and the second-stage piston.

[0005] Furthermore, the collecting device includes a spring, a connecting platform, a power rope, a sealing platform, a winding roller and a connecting rope. The connecting platform is connected to one end of the spring, the sealing platform is arranged on a side of the connecting platform away from the spring, the winding roller is arranged between the sealing platform and the connecting platform, and the winding roller is connected to the connecting platform through a power rope. One end of the connecting rope is connected to the connecting platform. A through hole is provided in the sealing platform. After the connecting rope is wound on the winding roller, the other end of the connecting rope passes through the sealing platform through the through hole; in the collecting device in the drill bit, the other end of the spring is connected to the drill bit, the connecting platform is slidably connected to the drill bit, the winding roller is rotatably installed in the drill bit, the sealing platform is connected to the drill bit, and the connecting rope is connected to the first anchor after passing through the sealing platform; in the collecting device in the secondary piston, the other end of the spring is connected to the secondary piston, the connecting platform is slidably connected to the secondary piston, the winding roller is rotatably installed in the secondary piston, the sealing platform is connected to the secondary piston, and the connecting rope is connected to the packaging membrane of the second anchor after passing through the sealing platform.

[0006] Furthermore, the connecting rope is an elastic rope.

[0007] Furthermore, a slurry stop plug is provided on the outer wall of the hollow rod body, the slurry stop plug is arranged on the rear side of the channel, and a thread is provided on the outer wall of the hollow rod body in front of the slurry stop plug.

[0008] Furthermore, a gasket and a nut for pre-tightening the stop plug to fit the rock and soil layer are provided on the rear side of the stop plug.

[0009] Furthermore, spiral blades are provided on the outer wall of the winding roller.

[0010] An anchoring construction method, using the above-mentioned double-speed resin anchoring agent for hollow internal injection anchor rod, comprises the following steps: S1. Drilling: Drilling holes in rock and soil using a drilling device; S2. Installation: Push the anchor rod as a whole into the drill hole of the rock and soil layer by the anchor rod trolley; S3, injection pressure stirring: apply gas injection pressure through the anchor trolley to push the secondary piston and the primary piston to move, release the anchoring agent, and then rotate the hollow rod body through the anchor trolley to stir the resin anchoring agent; S4. Make the gasket fit the surface of the rock and soil layer and tighten the nut to apply prestress.

[0011] The beneficial effects of the present invention are: Under the overall push of the air pressure on the secondary piston, the second anchor and the primary piston, the packaging films of the second anchor and the first anchor are respectively pierced by the fixed cone head and the movable cone head on the primary piston, and the packaging films are collected by the collecting device. There is no need to crush the packaging film of the anchor, which helps the anchor to react more fully and avoids insufficient reaction of the anchor caused by insufficient crushing of the packaging film, which helps to improve the quality of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 It is a schematic diagram of the structure inside the hollow rod body of the hollow internal injection type anchor rod for the dual-speed resin anchoring agent of the present invention; Figure 2 is a schematic structural diagram of the drill bit of the present invention; Figure 3 It is a structural schematic diagram of the first-stage piston of the present invention; Figure 4 It is a structural schematic diagram of the secondary piston of the present invention; Figure 5 It is a construction schematic diagram of the hollow internal injection type anchor rod for the dual-speed resin anchoring agent of the present invention.

[0014] In the figure: 1. rock and soil layer; 2. nut; 3. gasket; 4. slurry stopper; 5. hollow rod body; 5.1. thread; 5.2. hole; 5.3. rubber ring; 5.4. ring groove; 6. drill bit; 7. collecting device; 7.1. spring; 7.2. connecting platform; 7.3. power rope; 7.4. winding roller; 7.5. blocking platform; 7.6. through hole; 7.7. connecting rope; 8. first anchor; 9. second anchor; 10. first-stage piston; 10.1. groove; 10.2. wedge-shaped slider; 10.3. movable cone head; 10.4. spring latch; 10.5. fixed cone head; 10.6. plug body; 11. second-stage piston. DETAILED DESCRIPTION

[0015] 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.

[0016] It should be noted that the "front side" below refers to the side close to the bottom of the hole when in use, and the "rear side" refers to the side away from the bottom of the hole when in use. The present invention provides the following specific implementation schemes: First, as Figure 1-4 As shown, the present invention provides a hollow internal injection anchor rod for dual-speed resin anchoring agent, comprising a hollow rod body 5 and a drill bit 6 arranged at the front end of the hollow rod body 5, a first anchoring agent 8 is arranged at the front side of the hollow rod body 5, and a second anchoring agent 9 is arranged at the rear side of the hollow rod body 5, the reaction rates of the first anchoring agent 8 and the second anchoring agent 9 are different, an annular groove 5.4 is arranged on the inner wall of the hollow rod body 5 at the front side of the first anchoring agent 8, a first-stage piston 10 is arranged at the front side of the second anchoring agent 9, and a second-stage piston 11 is arranged at the rear side of the second anchoring agent 9, a rubber ring 5.3 installed on the hollow rod body 5 is arranged at the front side of the first-stage piston 10, a hole 5.2 for the outflow of the anchoring agent is arranged on the side wall of the hollow rod body 5 between the first-stage piston 10 and the rubber ring 5.3, that is, the middle part of the hollow rod body 5, and a hole 5.2 for the outflow of the anchoring agent is also arranged on the side wall of the hollow rod body 5 between the first anchoring agent 8 and the drill bit 6, that is, the front part of the hollow rod body 5. The first-stage piston 10 comprises a columnar plug body 10.6, a groove 10.1 provided on the plug body 10.6 and capable of cooperating with the rubber ring 5.3, a chisel slider 10.2 is provided along the radial direction of the groove 10.1, and a fixed cone head 10.5 protruding from the plug body 10.6 and a movable cone head 10.3 retracted in the plug body 10.6 are provided on the front and rear sides of the plug body 10.6, respectively, and the side surface of the movable cone head 10.3 is matched with the chisel slider 10.2 When the groove 10.1 is engaged with the rubber ring 5.3, the wedge-shaped slider 10.2 can push the tip of the movable cone head 10.3 out of the plug body 10.6. The plug body 10.6 is also provided with a spring latch 10.4 that can cooperate with the annular groove 5.4. After the spring latch 10.4 enters the annular groove 5.4, it can prevent the first-stage piston 10 from moving further; the drill bit 6 and the second-stage piston 11 are both provided with a collecting device 7 for collecting the anchor packaging film.

[0017] Furthermore, a plug is provided on the rear side of the drill bit 6, and correspondingly, a socket matching the plug is provided on the front side of the hollow rod body 5. During assembly, the drill bit 6 and the hollow rod body 5 are connected together through the plug and the socket.

[0018] Furthermore, the collecting device 7 includes a spring 7.1, a connecting platform 7.2, a power rope 7.3, a blocking platform 7.5, a winding roller 7.4 and a connecting rope 7.7. The connecting platform 7.2 is connected to one end of the spring 7.1, the blocking platform 7.5 is arranged on the side of the connecting platform 7.2 away from the spring 7.1, the winding roller 7.4 is arranged between the blocking platform 7.5 and the connecting platform 7.2, the winding roller 7.4 and the connecting platform 7.2 are connected by the power rope 7.3, one end of the connecting rope 7.7 is connected to the connecting platform 7.2, a through hole 7.6 is provided in the blocking platform 7.5, and after the connecting rope 7.7 is wound on the winding roller 7.4, the other end of the connecting rope 7.7 passes through the through hole 7.6 and goes out of the blocking platform 7.5.

[0019] Furthermore, in the collecting device 7 inside the drill bit 6, the other end of the spring 7.1 is connected to the drill bit 6, the connecting platform 7.2 is slidably connected to the drill bit 6, the winding roller 7.4 is rotatably installed in the drill bit 6, the sealing platform 7.5 is connected to the drill bit 6, and the connecting rope 7.7 passes through the sealing platform 7.5 and is connected to the packaging film of the first anchor 8.

[0020] Furthermore, in the collecting device 7 inside the secondary piston 11, the other end of the spring 7.1 is connected to the secondary piston 11, the connecting platform 7.2 is slidingly connected to the secondary piston 11, the winding roller 7.4 is rotatably installed in the secondary piston 11, the sealing platform 7.5 is connected to the secondary piston 11, and the connecting rope 7.7 passes through the sealing platform 7.5 and is connected to the packaging film of the second anchor 9.

[0021] Furthermore, there is a pair of wedge-shaped sliders 10.2 which are arranged in the same direction on both sides of the movable cone head 10.3. The side surfaces of the movable cone head 10.3 cooperate with the wedge surface. When the groove 10.1 cooperates with the rubber ring 5.3, the rubber ring 5.3 can make the wedge-shaped slider 10.2 retract into the plug body 10.6 so that the tip of the movable cone head 10.3 extends out.

[0022] Furthermore, the spring latch 10.4 is a combination of a pin and an elastic member. Before reaching the annular groove 5.4, the elastic member is in a compressed state and the pin is retracted in the plug body 10.6; after the pin reaches the position of the annular groove 5.4, the pin is ejected and inserted into the annular groove 5.4 under the elastic force of the elastic member.

[0023] Furthermore, the connecting rope 7.7 is an elastic rope, which facilitates the connection operation with the packaging film.

[0024] Furthermore, a slurry stopper 4 for preventing the anchoring agent from overflowing the borehole is provided on the outer wall of the hollow rod body 5. The slurry stopper 4 is arranged at the rear side of the channel 5.2. A thread 5.1 for stirring is provided on the outer wall of the hollow rod body 5 in front of the slurry stopper 4.

[0025] Furthermore, a gasket 3 and a nut 2 for pre-tightening the rock layer 1 are provided on the rear side of the grout stopper 4. During construction, a pre-tightening force is applied to the anchor rod through the gasket 3 and the nut 2.

[0026] Furthermore, in order to collect the packaging film more easily, a spiral blade is provided on the outer wall of the winding roller 7.4. One end of the connecting rope 7.7 is fixed on the connecting platform 7.2. After being wound in the blades of the winding roller 7.4, the other end of the connecting rope 7.7 is passed through and connected to the packaging film of the anchor.

[0027] During assembly, firstly put the first anchor 8 into the hollow rod body 5, rotate the winding roller 7.4 in the drill bit 6 to wind the power rope 7.3 and tighten the spring 7.1, then fix one end of the connecting rope 7.7 on the connecting platform 7.2, and after the connecting rope 7.7 is wound on the winding roller 7.4, the other end of the connecting rope 7.7 is extended to be fixedly connected with the packaging film of the first anchor 8, and then the drill bit 6 and the hollow rod body 5 are connected through the plug and the jack; then put the first-stage piston 10 into the hollow rod body 5; then connect the second anchor 9 and the second Piston 11, rotate the winding roller 7.4 in the secondary piston 11 to make it wind around the power rope 7.3 and then tighten the spring 7.1, then fix one end of the connecting rope 7.7 on the connecting platform 7.2, after the connecting rope 7.7 is wound on the winding roller 7.4, the other end of the connecting rope 7.7 extends out and is fixedly connected with the packaging film of the second anchor 9, at this time the second anchor 9 conflicts with the blocking platform 7.5; finally, put the second anchor 9 and the secondary piston 11 into the hollow rod body 5 together, install the stop plug 4, nut 2, and gasket 3 to complete the assembly.

[0028] Second, as Figure 5 As shown, the present invention provides an anchoring construction method, using the above-mentioned double-speed resin anchoring agent for hollow internal injection anchor rod, comprising the following steps: S1. Drilling: Drilling a hole in the rock and soil layer 1 using a drilling device.

[0029] S2. Installation: Push the anchor rod as a whole into the drill hole of the rock and soil layer 1 by using the anchor rod trolley.

[0030] S3, injection pressure stirring: applying gas injection pressure through the anchor trolley to push the secondary piston 11 and the primary piston 10 to move, release the anchoring agent, and then rotate the hollow rod body 5 through the anchor trolley to stir the resin anchoring agent; S3.1, injection pressure: Apply gas injection pressure through the anchor trolley to push the secondary piston 11, the second anchor 9, and the primary piston 10 to move upward (or obliquely upward) along the inner wall of the hollow rod body 5 until the rubber ring 5.3 is embedded in the groove 10.1 of the primary piston 10. At this time, the primary and secondary pistons 11 stop moving, the rubber ring 5.3 causes the wedge surface slider 10.2 to retract, and under the action of the wedge surface, the movable cone head 10.3 pushes out the plug body 10.6, puncturing the packaging film of the second anchor 9, and the material tension of the packaging film disappears. The spring 7.1 in the secondary piston 11 is released and drives the winding roller 7.4 to rotate so that the broken packaging film gathers in the secondary piston 11, and the secondary piston 11 continues to push forward to make the second anchor 9 flow out through the channel 5.2 in the middle of the hollow rod body 5. After the second anchor 9 is released, under the action of air pressure, the secondary piston 11 will push the primary piston 10 to cross the position of the rubber ring 5.3 and continue to move forward. Then the fixed cone head 10.5 of the first piston 10 pierces the first anchor 8, the material tension of the packaging film disappears, the spring 7.1 in the drill bit 6 is released and drives the winding roller 7.4 to rotate so that the broken packaging film gathers in the drill bit 6, and the second piston 11 and the first piston 10 continue to advance to make the first anchor 8 flow out through the channel 5.2 at the front of the hollow rod 5. When the second piston 11 advances to the point where the spring pin 10.4 reaches the annular groove 5.4, the pin pops out and embeds in the annular groove 5.4 to prevent the resin anchor from flowing back into the hollow rod 5.

[0031] S3.2, stirring: the anchor is rotated by the anchor trolley, so that the drill bit 6 and the hollow rod body 5 stir the resin anchoring agent. After a certain period of time, the stirring is stopped and the resin anchoring agent is waited for to gel to produce an anchoring effect.

[0032] S4. Make the gasket 3 fit the surface of the rock and soil layer 1, and tighten the nut 2 to apply prestress.

[0033] Under the overall push of the air pressure on the secondary piston 11, the second anchor 9 and the primary piston 10, the packaging films of the second anchor 9 and the first anchor 8 are pierced respectively by the fixed cone head 10.5 and the movable cone head 10.3 on the primary piston 10, and the packaging films are collected by the collecting device 7. There is no need to break the packaging film of the anchor, which helps the anchor to react more fully, avoids insufficient reaction of the anchor caused by insufficient breaking of the packaging film, and helps to improve the quality of the project.

[0034] 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 internal injection anchor rod for dual-speed resin anchoring agent, comprising a hollow rod body (5) and a drill bit (6) arranged at the front end of the hollow rod body (5), a first anchoring agent (8) and a second anchoring agent (9) having different reaction rates are arranged on the front and rear sides of the hollow rod body (5), respectively, characterized in that: An annular groove (5.4) is provided on the inner wall of the hollow rod body (5) at the front side of the first anchor (8); a first-stage piston (10) and a second-stage piston (11) are provided on the front and rear sides of the second anchor (9), respectively; a rubber ring (5.3) mounted on the hollow rod body (5) is provided on the front side of the first-stage piston (10); a hole (5.2) is provided on the side wall of the hollow rod body (5) between the first-stage piston (10) and the rubber ring (5.3) and on the side wall of the hollow rod body (5) between the first anchor (8) and the drill bit (6); the first-stage piston (10) comprises a columnar plug body (10.6), a groove (10.1) provided on the plug body (10.6) and capable of cooperating with the rubber ring (5.3), and a groove (10.1) along the radial direction of the groove (10.1). A wedge-shaped slider (10.2) is provided in the direction of the plug body (10.6); a fixed cone head (10.5) protruding from the plug body (10.6) and a movable cone head (10.3) retracted in the plug body (10.6) are respectively provided on the front and rear sides of the plug body (10.6); the side surface of the movable cone head (10.3) cooperates with the wedge-shaped slider (10.2); when the groove (10.1) and the rubber ring (5.3) are engaged, the wedge-shaped slider (10.2) can push the tip of the movable cone head (10.3) out of the plug body (10.6); a spring latch (10.4) capable of cooperating with the annular groove (5.4) is also provided in the plug body (10.6); a collecting device (7) for collecting the anchoring agent packaging film is provided in both the drill bit (6) and the secondary piston (11).

2. A hollow internal injection anchor rod for dual-speed resin anchoring agent according to claim 1, characterized in that: The collecting device (7) comprises a spring (7.1), a connecting platform (7.2), a power rope (7.3), a blocking platform (7.5), a winding roller (7.4) and a connecting rope (7.7); the connecting platform (7.2) is connected to one end of the spring (7.1); the blocking platform (7.5) is arranged on a side of the connecting platform (7.2) away from the spring (7.1); the winding roller (7.4) is arranged between the blocking platform (7.5) and the connecting platform (7.2); the winding roller (7.4) and the connecting platform (7.2) are connected via the power rope (7.3); one end of the connecting rope (7.7) is connected to the connecting platform (7.2); a through hole (7.6) is provided in the blocking platform (7.5); after the connecting rope (7.7) is wound on the winding roller (7.4), the other end of the connecting rope (7.7) passes through the through hole (7.6) and out of the blocking platform (7.5); The collecting device (7) is in the secondary piston (11), the other end of the spring (7.1) is connected to the drill bit (6), the connecting platform (7.2) is slidably connected to the drill bit (6), the winding roller (7.4) is rotatably mounted in the drill bit (6), the blocking platform (7.5) is connected to the drill bit (6), and the connecting rope (7.7) passes through the blocking platform (7.5) and is connected to the packaging film of the first anchoring agent (8); in the collecting device (7) in the secondary piston (11), the other end of the spring (7.1) is connected to the secondary piston (11), the connecting platform (7.2) is slidably connected to the secondary piston (11), the winding roller (7.4) is rotatably mounted in the secondary piston (11), the blocking platform (7.5) is connected to the secondary piston (11), and the connecting rope (7.7) passes through the blocking platform (7.5) and is connected to the packaging film of the second anchoring agent (9).

3. A hollow internal injection anchor rod for dual-speed resin anchoring agent according to claim 2, characterized in that: The connecting rope (7.7) is an elastic rope.

4. A hollow internal injection anchor rod for dual-speed resin anchoring agent according to claim 1, characterized in that: A slurry stop plug (4) is provided on the outer wall of the hollow rod body (5), the slurry stop plug (4) is arranged on the rear side of the hole (5.2), and a thread (5.1) is provided on the outer wall of the hollow rod body (5) in front of the slurry stop plug (4).

5. A hollow internal injection anchor rod for dual-speed resin anchoring agent according to claim 4, characterized in that: A gasket (3) and a nut (2) for pre-tightening the stop plug (4) are provided on the rear side of the stop plug (4) and are used to fit the rock layer (1).

6. A hollow internal injection anchor rod for dual-speed resin anchoring agent according to claim 1, characterized in that: The outer wall of the winding roller (7.4) is provided with spiral blades.

7. An anchoring construction method, characterized in that: The hollow internal injection anchor rod for the dual-speed resin anchoring agent according to any one of claims 1 to 6 comprises the following steps: S1. Drilling: drilling a hole in the rock layer (1) using a drilling device; S2, installation: pushing the entire anchor into the drill hole in the rock layer (1) by means of an anchor trolley; S3, injection pressure stirring: applying injection pressure through the anchor trolley to push the secondary piston (11) and the primary piston (10) to move, release the anchoring agent, and then rotate the hollow rod body (5) through the anchor trolley to stir the resin anchoring agent; S4. Make the gasket (3) fit the surface of the rock and soil layer (1) and tighten the nut (2) to apply prestress.

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