Self-propelled quick grouting anchor rod

Abstract

The utility model discloses a self-propelled quick grouting anchor rod, which belongs to the technical field of tunnel and underground space engineering reinforcement, and comprises an outer rod body, an end anchor head, grouting small pipes, grouting inclined pipes, a stop-grouting plug and the like, and a plurality of grouting small pipes and grouting inclined pipes are arranged on the rod wall of the outer rod body; the ends of the small grouting pipes and the ends of the inclined grouting pipes are open, and a plurality of small grouting holes are formed in the pipe parts. Threads are arranged at the outer end of the outer rod body, and the outer rod body can be connected with a drilling machine and a stop-grouting plug in sequence. An anchor head is arranged at the bottom end part of the outer rod body; the center of the anchor head is provided with a one-way moving pipe piece; the stop-grouting plug is connected with the deformed steel bar; the deformed steel bar is slightly longer than the anchor rod. According to the grouting guide pipe, the drilling, grouting and anchoring strengthening effects can be achieved, the grouting range can be effectively enlarged, secondary grouting is avoided, and surrounding rock deformation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel and underground space engineering reinforcement, and more specifically to a self-propelled rapid grouting anchor rod. Background Art

[0002] When excavating in underground spaces and tunnels, with the advancement and improvement of the support system, a set of stable grouting reinforcement measures has gradually been formed, making the construction of underground space projects safer, more efficient and more economical, and greatly promoting the development of underground projects.

[0003] However, in the field of grouting reinforcement, the existing self-propelled grouting anchors mainly overflow grouting through the grouting holes around the pipe wall after drilling is completed, forming slurry veins in the surrounding rock. After the slurry is finally solidified, it mainly resists the deformation of the surrounding rock through its tensile effect. After the slurry solidifies, its tensile strength is much smaller than its compressive strength. In an environment with poor surrounding rock conditions, it is not easy to ensure the stability of the surrounding rock. Therefore, it is necessary to strengthen the grouting range and the connection between the anchor and the surrounding rock to reduce the deformation of the surrounding rock. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a self-propelled rapid grouting anchor rod which can ensure the stability of the surrounding rock and enhance the tensile strength of the grouting body.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A self-propelled fast grouting anchor comprises an outer rod body, on which a plurality of grouting small tubes and grouting inclined tubes are arranged; a plurality of grouting small holes are arranged on the tube walls of the grouting small tubes and the grouting inclined tubes; the outer ends of the grouting small holes are arranged with threads, and the bottom ends are anchor heads; the center of the anchor head is a unidirectionally movable pipe segment; the grouting stopper is fixedly connected to the threaded steel bar.

[0007] According to the above features, the small grouting tube and the inclined grouting tube are located at the upper and lower sides of the grouting rod body, the ends of the small grouting tube and the inclined grouting tube are open, and a plurality of small grouting holes are arranged on the tube.

[0008] In some embodiments, the outer end of the outer rod body is arranged with threads and is tightly connected to the drilling rig.

[0009] According to the above features, the bottom end of the outer rod body is an anchor head.

[0010] In some embodiments, the center of the anchor head is a one-way moving segment, which is pushed out under the action of the threaded steel bar, and the segment moves one-way at the same time.

[0011] According to the above features, the slurry stopper is fixedly connected to the threaded steel bar.

[0012] In some embodiments, the inner side of the grout stopper has a threaded structure, which is tightly connected with the end thread of the anchor rod by rotation.

[0013] According to the above features, the length of the threaded steel bar is greater than the length of the anchor rod, and after the anchor rod and the grout stopper are connected, the one-way movable pipe segment at the anchor head is pushed out.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The utility model relates to a self-propelled fast grouting anchor rod. By placing the anchor rod on a drilling rig, self-propelled drilling can be achieved. At the same time, grouting is performed through a small grouting pipe connected to the rod body, which greatly increases the scope of grouting reinforcement. After the slurry solidifies, the small grouting pipe and the slurry work together to significantly improve the anchoring force. After the grouting is completed, a grouting plug connected to a threaded steel bar is left in the hole, which can greatly enhance the tensile strength of the grouting body. This equipment can complete integrated operations such as drilling, grouting, grouting, and anchoring, which is convenient and fast, and can effectively ensure the stability of the surrounding rock. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram after the utility model is used.

[0017] Figure 2 It is a schematic diagram of the structure of the utility model before use;

[0018] Figure 3 It is a schematic diagram of the connection between the slurry stopper and the threaded steel bar of the utility model.

[0019] Among them, 1-outer rod, 2-small grouting hole, 3-small grouting tube, 4-threaded steel bar, 5-inclined grouting tube, 6-grouting plug, 7-thread, 8-segment, 9-anchor head. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-3 A self-propelled fast grouting anchor rod is composed of a rod body device and a grouting plug device, specifically including an outer rod body 1, a grouting hole 2, a grouting small tube 3, a threaded steel bar 4, a grouting inclined tube 5, a grouting plug 6, an end thread 7, an end one-way movable pipe segment 8, and an end anchor head 9.

[0023] A plurality of grouting small tubes 3 and grouting inclined tubes 5 are arranged on the outer rod body 1 of the anchor rod; a plurality of grouting small holes 2 are arranged on the tube walls of the grouting small tubes 3 and the grouting inclined tubes 5; the outer ends of the grouting small holes 2 are arranged with threads 7, and the bottom ends are anchor heads 9; the center of the anchor head 9 is a unidirectionally movable pipe segment; the grouting plug 6 is fixedly connected to the threaded steel bar 4.

[0024] The grouting small tube 3 and the grouting inclined tube 5 are located at the upper and lower sides of the grouting rod body 1. The ends of the grouting small tube 3 and the grouting inclined tube 5 are open, and a plurality of grouting small holes 2 are arranged on the tube part, which can discharge grout at the same time;

[0025] The outer end of the outer rod body 1 is provided with a thread 7, which can be tightly connected with a drilling rig; the bottom end of the outer rod body 1 is an anchor head 9, which can be used for self-driving drilling under the action of the drilling rig;

[0026] The center of the anchor head 9 is a unidirectionally movable segment 8, which can be pushed out under the action of the threaded steel bar 4. At the same time, the segment 8 is unidirectionally movable and can remain fixed during the drilling process; the slurry stop plug 6 is fixedly connected to the threaded steel bar 4; the inner side of the slurry stop plug 6 has a threaded structure, which can be tightly connected with the end thread 7 of the anchor rod by rotation; the length of the threaded steel bar 4 is greater than the length of the anchor rod, and the unidirectional movable segment 8 at the anchor head 9 can be pushed out after the anchor rod and the slurry stop plug 6 are connected.

[0027] The anchor rod is reinforced by grouting, and the specific implementation method is as follows:

[0028] The self-propelled anchor rod body is installed on the drilling rig by using the shank connector, the drilling rig is turned on, and the anchor rod is drilled at the designated construction site by rotating it under the action of the anchor head 9;

[0029] After the drilling is completed, a grouting device is connected to the end of the anchor rod, and grout is injected into the borehole through the grouting device. At the same time, the grout overflows through the grouting small holes 2 of the grouting small tube 3 and the grouting inclined tube 5, mixes with the surrounding rock and soil, and solidifies into a whole;

[0030] After grouting is completed, the grouting device and the anchor are separated, and the grouting plug 6 and the anchor are connected at the same time. The grouting plug can also serve as an anchor to passively support the surrounding rock.

[0031] The utility model relates to a fast grouting reinforcement device in the field of tunnel and underground space engineering, specifically a self-propelled fast grouting anchor rod, which can realize self-propelled drilling by connecting a drilling rig, and increases the grouting range by a grouting small tube and a grouting inclined tube, and the inclined tube at the end can effectively interact with the surrounding rock to enhance the anchoring force. The grouting anchor rod can realize integrated operations such as drilling, grouting, and anchoring, enhance the anchoring effect, avoid secondary grouting, and reduce deformation of the surrounding rock.

[0032] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A self-propelled rapid grouting anchor rod, comprising an outer rod body (1), characterized in that The outer rod body (1) is provided with a plurality of grouting small tubes (3) and grouting inclined tubes (5); a plurality of grouting small holes (2) are provided on the tube walls of the grouting small tubes (3) and the grouting inclined tubes (5); the outer ends of the grouting small holes (2) are arranged with threads (7), and the bottom ends are anchor heads (9); the center of the anchor head (9) is a unidirectionally movable pipe segment; and the grouting stopper (6) is fixedly connected to the threaded steel bar (4).

2. A self-propelled rapid grouting anchor according to claim 1, characterized in that The small grouting tube (3) and the inclined grouting tube (5) are located at the upper and lower sides of the grouting rod body (1); the ends of the small grouting tube (3) and the inclined grouting tube (5) are open, and a plurality of small grouting holes (2) are provided on the tube parts.

3. A self-propelled rapid grouting anchor according to claim 1, characterized in that The outer end of the outer rod body (1) is provided with a thread (7) and is tightly connected to the drilling rig.

4. A self-propelled rapid grouting anchor according to claim 1, characterized in that The bottom end of the outer rod body (1) is an anchor head (9).

5. The self-propelled rapid grouting anchor according to claim 1, characterized in that The center of the anchor head (9) is a pipe segment (8) that moves in one direction, which is pushed out under the action of the threaded steel bar (4), and the pipe segment (8) moves in one direction at the same time.

6. A self-propelled rapid grouting anchor according to claim 1, characterized in that The slurry stopper (6) is fixedly connected to the threaded steel bar (4).

7. The self-propelled rapid grouting anchor according to claim 1, characterized in that The inner side of the grout stopper (6) has a threaded structure, which is tightly connected to the end thread (7) of the anchor rod by rotation.

8. The self-propelled rapid grouting anchor according to claim 1, characterized in that The length of the threaded steel bar (4) is greater than that of the anchor rod, and after the anchor rod and the grout stopper (6) are connected, the one-way movable pipe segment (8) at the anchor head (9) is pushed out.

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