CN212054749U - Hollow grouting type support anchor rod - Google Patents
Hollow grouting type support anchor rod Download PDFInfo
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- CN212054749U CN212054749U CN202020569172.1U CN202020569172U CN212054749U CN 212054749 U CN212054749 U CN 212054749U CN 202020569172 U CN202020569172 U CN 202020569172U CN 212054749 U CN212054749 U CN 212054749U
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- anchor rod
- hollow
- rod body
- type support
- hollow anchor
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Abstract
The utility model discloses a hollow grouting type support anchor rod, which comprises a hollow anchor rod body, wherein the hollow anchor rod body is of a structure with one end sealed and one end open, a barb body is arranged on the section of the hollow anchor rod body close to the sealed end, a through hole is arranged on the pipe wall of the hollow anchor rod body, and a thread is arranged on the pipe wall of the hollow anchor rod body close to the open section; an expansion pipe, an extrusion piece and an expansion nut are sequentially sleeved outside the hollow anchor rod body from the sealing end to the opening end, and the expansion nut is matched with the threads on the hollow anchor rod body. Grout enters the interior of the anchor rod body through the grouting channel and then flows into the anchor rod hole through the grout overflow hole, after grouting is completed, the grout is solidified, such as standing still and the like, and the anchor rod body is effectively combined with rock into a whole through grouting, so that the integration of the anchor rod, the grout and surrounding rock is realized. The problem of the initial anchor power of slip casting stock in the soft rock tunnel and anchor effect relatively poor is improved.
Description
Technical Field
The utility model relates to an anchor rod field particularly, relates to an anchor rod is strutted to cavity slip casting type.
Background
The anchor bolt support is widely applied to underground mining engineering, but the mining depth is continuously increased along with the expansion of the mining range of coal mines, the mining condition is more and more difficult, and particularly under large buried depth, complex structure and mining stress, the soft rock roadway support under the complex structure and the ground stress becomes a difficult problem which restricts the high-efficiency and safe production of the coal mines.
Along with the development of technology, multiple slip casting stock has appeared at present, but the slip casting stock does not have initial anchor force at the initial stage of anchor, just produce anchoring effect after the thick liquid solidifies to certain intensity for slip casting stock anchor effect is relatively poor, in addition, the area of contact of slip casting stock and country rock is not enough, the country rock in soft rock tunnel is very easy to be out of shape, the slip casting stock during the deformation is very easy to be lost efficacy, the stock is very low with the cohesion of country rock, thereby make the slip casting stock lose due supporting effect, seriously threaten the safety in soft rock tunnel. How to invent a hollow grouting type support anchor rod to improve the problems becomes a problem to be solved urgently by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to compensate above not enough, the utility model provides a stock is strutted to cavity slip casting type aims at improving the initial anchorage force and the relatively poor problem of anchor effect of slip casting stock in the soft rock tunnel.
The utility model discloses a realize like this: the hollow grouting type support anchor rod comprises a hollow anchor rod body, wherein the hollow anchor rod body is of a structure with one sealed end and one open end, a barb body is arranged on the section, close to the sealed end, of the hollow anchor rod body, a through hole is formed in the pipe wall of the hollow anchor rod body, and threads are arranged on the pipe wall, close to the open end, of the hollow anchor rod body; an expansion pipe, an extrusion piece and an expansion nut are sequentially sleeved outside the hollow anchor rod body from the sealing end to the opening end, and the expansion nut is matched with the threads on the hollow anchor rod body.
The hollow grouting type support anchor rod is characterized in that a pulp overflowing hole is formed in the pipe wall of the extrusion piece.
In the hollow grouting type support anchor rod, the hollow anchor rod body is also connected with a sealing and drilling tray and a locking nut, and the sealing and drilling tray is positioned between the expansion nut and the locking nut.
In the hollow grouting type support anchor rod, a plugging plug is arranged at the opening end of the hollow anchor rod body.
In the hollow grouting type support anchor rod, a drill bit is arranged at the sealed end of the hollow anchor rod body.
The hollow grouting type support anchor rod is characterized in that the drill bit comprises a reinforcing plate and a tooth-shaped head, the reinforcing plate is fixedly connected with the hollow anchor rod body, and the tooth-shaped head is fixedly connected with the reinforcing plate.
The hollow grouting type support anchor rod is characterized in that a sealing ring is arranged between an extrusion piece and an expansion nut, and the outer diameter of the sealing ring is larger than that of the extrusion piece.
The utility model has the advantages that: the utility model designs a grouting type supporting anchor bolt by utilizing the principle of the existing expansion screw, the hollow anchor bolt body adopts a structure with one end sealed and one end open, the cylinder section of the hollow anchor bolt body close to the sealed end is provided with a barb body, the barb body is convenient to be arranged for preliminary fixation of the hollow anchor bolt body, the inclination can be effectively avoided, the single-person operation is convenient, meanwhile, the pipe wall of the hollow anchor bolt body is provided with a through hole, the pipe wall of the hollow anchor bolt body close to the open section is provided with a thread, the expansion pipe, an extrusion piece and an expansion nut are sequentially sleeved outside the hollow anchor bolt body from the sealed end to the open end, the expansion nut is matched with the thread on the hollow anchor bolt body, when the hollow anchor bolt is used, a hole slightly larger than the hollow anchor bolt body is firstly drilled, then the sleeved expansion pipe, the extrusion pipe and a sealing ring are sequentially sleeved on the anchor bolt body, then, the extrusion pipe moves along the direction from the anchor rod body to the expansion pipe, so that the expansion pipe radially expands and props against the wall of the surrounding rock hole of the anchor rod hole, the contact and the frictional resistance between the anchor rod and the wall of the surrounding rock hole are increased, and the initial anchoring force of the anchor rod at the initial anchoring stage is further improved. Grout enters the interior of the anchor rod body through the grouting channel and then flows into the anchor rod hole through the grout overflow hole, the grout is waited to be solidified after grouting is completed, the anchor rod body is effectively combined with rock into a whole through grouting, and fusion of the anchor rod, the grout and surrounding rock is achieved. The problem of the initial anchor power of slip casting stock in the soft rock tunnel and anchor effect relatively poor is improved. The pipe wall of the extrusion piece is provided with the slurry overflow hole, so that the uniformity of grouting in the hole can be further improved. The hollow anchor rod body is also connected with a sealing drilling tray and a locking nut, and the sealing drilling tray and the locking nut are matched for use, so that grouting in the drilling hole can be prevented from flowing out, and the fullness of grouting in the drilling hole is ensured. The open end of the hollow anchor rod body is provided with the slurry blocking plug, so that grouting can be prevented from being left from the open end of the hollow anchor rod. The sealing end is provided with a drill bit which is a disposable drill bit and is convenient for fine adjustment of drilling.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic structural view of the hollow anchor rod body 1 of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1-2, the hollow anchor rod body 1 is made of a thick-walled steel pipe, the length of the thick-walled steel pipe is customized according to the use requirement, the length of the thick-walled steel pipe is generally 1-3 meters, a drill bit is welded at one end of the steel pipe, the drill bit comprises a reinforcing plate 12 and a tooth-shaped head 13, the reinforcing plate 12 is fixedly connected with the hollow anchor rod body 1, and the tooth-shaped head 13 is fixedly connected with the reinforcing plate 12. The connection of the reinforcing plate 12 makes the hollow anchor rod body 1 into a structure with one end sealed and one end opened. Be equipped with barb body 3 in hollow stock body 1 near the cylinder section of seal end, set up barb body 3 and can make hollow stock body 1 increase and the surrounding rock between the frictional force, fixed effect of reinforcing, and can realize tentatively fixing a position, make things convenient for one-man operation. A through hole 2 is arranged on the pipe wall of the hollow anchor rod body 1, and a thread is arranged on the pipe wall of the hollow anchor rod body 1 close to the opening section; expansion pipe 5, extruded article 6 and inflation nut 7 have been cup jointed in proper order by seal end to open end outside hollow stock body 1, and the screw thread on inflation nut 7 and the hollow stock body 1 cooperatees, is equipped with sealing washer 4 between extruded article 6 and inflation nut 7, the external diameter of sealing washer 4 is greater than the external diameter of extruded article 6. Meanwhile, the pipe wall of the extrusion part 6 is provided with a pulp overflow hole 8; the hollow anchor rod body 1 is also connected with a sealing and drilling tray 9 and a locking nut 10, and the sealing and drilling tray 9 is positioned between the expansion nut 7 and the locking nut 10; the opening end of the hollow anchor rod body 1 is provided with a slurry blocking plug 11. The sealing ring 4 is arranged between the extrusion part 6 and the expansion nut 7, so that the slurry can be prevented from leaking between the expansion nut 7 and the extrusion part 6, and the grouting pressure is ensured.
When the expansion anchor rod is used, the expansion pipe 5, the extrusion piece 6 and the sealing ring 4 are sequentially sleeved on the hollow anchor rod body 1, then the hollow anchor rod body 1 is placed in an anchor rod hole, the expansion nut 7 is rotated by adopting a lengthened socket wrench, the extrusion piece 6 moves along the hollow anchor rod body 1 to the direction of the expansion pipe 5, and the expansion pipe 5 is radially expanded and props against the wall of a surrounding rock hole of the anchor rod hole due to the opening formed in the expansion pipe 5, so that the contact and friction resistance between the hollow anchor rod body 1 and the wall of the surrounding rock hole is increased, and the initial anchoring force of the injection anchor rod at the initial anchoring stage is improved; and then the grout stop plug 150, the tray 9 and the lock nut 10 are sequentially installed on the hollow anchor rod body 1, the lock nut 10 enables the tray 9 to be attached to the anchor rod hole, grout enters the hollow anchor rod body 1 through the open end of the hollow anchor rod body 1, then flows out of the extrusion piece 6 and the expansion pipe 5 through the through hole 2, then flows into the anchor rod hole through the grout overflow hole 8, the open end of the hollow anchor rod body 1 is plugged by the grout stop plug 11 after grouting is completed, then the grout is solidified after standing still and the like, the anchor rod body is effectively combined with the rock into a whole through grouting, and the integration of the anchor rod, the grout and the surrounding rock is realized. The problem of the initial anchor power of slip casting stock in the soft rock tunnel and anchor effect relatively poor is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A hollow grouting type support anchor rod is characterized by comprising a hollow anchor rod body (1), wherein the hollow anchor rod body (1) is of a structure with one end sealed and the other end opened, a barb body (3) is arranged on the section, close to the sealed end, of the hollow anchor rod body (1), a through hole (2) is formed in the pipe wall of the hollow anchor rod body (1), and threads are arranged on the pipe wall, close to the opened section, of the hollow anchor rod body (1); an expansion pipe (5), an extrusion piece (6) and an expansion nut (7) are sequentially sleeved outside the hollow anchor rod body (1) from the sealing end to the opening end, and the expansion nut (7) is matched with the threads on the hollow anchor rod body (1).
2. The hollow grouting type support anchor rod according to claim 1, wherein a grout hole (8) is opened on the pipe wall of the extrusion piece (6).
3. A hollow grouting type support anchor as claimed in claim 1, characterised in that a hole sealing tray (9) and a lock nut (10) are also connected to the hollow anchor rod body (1), the hole sealing tray (9) being located between the expansion nut (7) and the lock nut (10).
4. A hollow grouting type support anchor as claimed in claim 1, characterised in that a grout plug (11) is provided at the open end of the hollow anchor rod body (1).
5. A hollow grouting type support anchor as claimed in claim 1, characterised in that a drill bit is provided on the closed end of the hollow anchor rod body (1).
6. A hollow grouting type support anchor according to claim 5, characterised in that the drill bit comprises a reinforcing plate (12) and a tooth head (13), the reinforcing plate (12) being fixedly connected to the hollow anchor rod body (1), the tooth head (13) being fixedly connected to the reinforcing plate (12).
7. A hollow grouting type support bolt according to claim 1, characterised in that a sealing ring (14) is provided between the extrusion piece (6) and the expansion nut (7), the sealing ring (14) having an outer diameter larger than the extrusion piece (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020569172.1U CN212054749U (en) | 2020-04-16 | 2020-04-16 | Hollow grouting type support anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020569172.1U CN212054749U (en) | 2020-04-16 | 2020-04-16 | Hollow grouting type support anchor rod |
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| Publication Number | Publication Date |
|---|---|
| CN212054749U true CN212054749U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020569172.1U Active CN212054749U (en) | 2020-04-16 | 2020-04-16 | Hollow grouting type support anchor rod |
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| CN (1) | CN212054749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879058A (en) * | 2021-01-21 | 2021-06-01 | 北京科技大学 | Radial internal expansion resistance-increasing anchor rod cable supporting device and method |
-
2020
- 2020-04-16 CN CN202020569172.1U patent/CN212054749U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112879058A (en) * | 2021-01-21 | 2021-06-01 | 北京科技大学 | Radial internal expansion resistance-increasing anchor rod cable supporting device and method |
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