LU102510B1 - Grouting expansion anchor rod capable of improving anti-pull effect - Google Patents
Grouting expansion anchor rod capable of improving anti-pull effect Download PDFInfo
- Publication number
- LU102510B1 LU102510B1 LU102510A LU102510A LU102510B1 LU 102510 B1 LU102510 B1 LU 102510B1 LU 102510 A LU102510 A LU 102510A LU 102510 A LU102510 A LU 102510A LU 102510 B1 LU102510 B1 LU 102510B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- anchor rod
- main body
- rod main
- steel sheet
- grout
- Prior art date
Links
- 230000000694 effects Effects 0.000 title claims abstract description 14
- 239000011440 grout Substances 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims description 16
- 239000011435 rock Substances 0.000 abstract description 21
- 238000004873 anchoring Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention discloses a grouting expansion anchor rod capable of improving an anti-pull effect. The grouting expansion anchor rod comprises an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices. A through hole is formed along an axis at a center of the anchor rod main body, the anchor head is fixed to one end of the anchor rod main body, a plurality of grout discharging openings are formed in the side part of the anchor rod main body, and the plurality of lateral expansion devices are mounted on the outer side of the anchor rod main body and cover the grout discharging openings, separately; each lateral expansion device comprises a steel sheet and a flexible belt, one end of the steel sheet is connected to the outer side of the anchor rod main body through a hinge, and the flexible belt covers the steel sheet externally and the steel sheet is tightly attached to the outer side of the anchor rod main body; and the tray is mounted on the anchor rod main boy and is limited by nuts. According to the invention, the anchor rod is expanded and unfolded while grouting is performed, so that the anchoring range of the anchor rod to surrounding rocks around is increased effectively, and therefore, a condition that the anchor rod slips from the surrounding rocks in the using process is avoided.
Description
BL-5194 GROUTING EXPANSION ANCHOR ROD CAPABLE OF IMPROVING 1106910 ANTI-PULL EFFECT
TECHNICAL FIELD The present invention relates to a grouting expansion anchor rod, in particular to a grouting expansion anchor rod capable of improving an anti-pull effect.
BACKGROUND The anchor rod is a rodlike body anchored into a rock body. The anchor rod has many advantages that pitwood and steel are saved, the supporting cost is lowered, the tunneling section is small, deformation of a roadway is small and the maintenance cost is low; in addition, the anchor rod is safe to work and light and convenient, can alleviate the physical labor, reduces the ventilating resistance, facilitates primary roadway forming construction and acceleration of tunneling speed, and has the characteristics of being wide in application range, high in adaptability and capable of reducing the transportation amount and facilitating transportation and lifting in a mine.
However, an existing anchor rod cannot prevent weathering of surrounding rocks, i.e., the anchor rod slips to lose the supporting effect as the anchor rod cannot prevent rocks in a gap between the anchor rods from peeling off.
SUMMARY In order to solve the problem in the prior art, the present invention provides the grouting expansion anchor rod capable of improving the anti-pull effect. The anchor rod is expanded and unfolded while grouting is performed, barbs are embedded into the surrounding rocks and the steel sheets to apply the expansion force to the surrounding rocks, so that the anchoring range of the anchor rod to the surrounding 1
BL-5194 rocks around is increased effectively, and therefore, a condition that the anchor rod LU102510 slips from the surrounding rocks in the using process is avoided.
In order to achieve the purpose, the present invention adopts a technical scheme that a grouting expansion anchor rod capable of improving an anti-pull effect, including an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices, a through hole being formed along an axis at a center of the anchor rod main body, the anchor head being fixed to one end of the anchor rod main body, a plurality of grout discharging openings being formed in the side part of the anchor rod main body, and the plurality of lateral expansion devices being mounted on the outer side of the anchor rod main body and covering the grout discharging openings, separately; each lateral expansion device comprising a steel sheet and a flexible belt, one end of the steel sheet being connected to the outer side of the anchor rod main body through a hinge, and the flexible belt covering the steel sheet externally and the steel sheet being tightly attached to the outer side of the anchor rod main body; and the tray being mounted on the anchor rod main boy and being limited by nuts; after injecting a grout liquid to the through hole, the grout liquid applying a pressure to the steel sheet from each grout discharging opening to further make the other end of the steel sheet be unfolded far away from the anchor rod body.
Further, the anchor rod further includes the grout stopping plug sleeving the anchor rod main body. When the anchor rod is used, discharge of the grout liquid from the drilled hole can be alleviated, so that the grouting effect is guaranteed.
Further, the steel sheet is in a semi-arc fan shape, and a plurality of barbs are distributed on the side surface, facing the anchor rod main body, of the steel sheet. By adopting the structure, it can be ensured that the unfolded steel sheet generates the expansion force to the surrounding soil body to improve the anchoring effect, and meanwhile, the plurality of barbs can be embedded into the rock body, so that the anti-pull force of the anchor rod is further improved. 2
BL-5194 Compared with the prior art, by combining the anchor head, the anchor rod main LU102510 body, the tray and the plurality of lateral expansion devices, the anchor rod main body is inserted into the surrounding rock needed to be anchored first, then the grout stopping plug and the tray are mounted on the anchor rod main body and the tray and the surrounding rock are fastened through nuts, then the grout is injected into the through hole through the other end of the anchor rod main body, the grout liquid applies the pressure to the steel sheet of each lateral expansion device from each grout discharging opening, so that the other end of the steel sheet is unfolded far away from the anchor rod body and generates the expansion force to the surrounding soil body, as the external flexible belt is made of the flexible material, the flexible belt will be stretched and deformed as the steel sheet is unfolded till the flexible belt deforms to exceed a breakage critical value, and at the time, the flexible belt breaks, so that the grout liquid starts to flow between the anchor rod main body and the surrounding rocks, and meanwhile, the barbs will be embedded into the rock body as the grout liquid flows out, and after the grout liquid is solidified, the anti-pull force of the anchor rod is improved effectively; the anchor rod is expanded and unfolded while grouting is performed, so that the anchoring range of the anchor rod to surrounding rocks around is increased effectively, and therefore, a condition that the anchor rod slips from the surrounding rocks in the using process is avoided.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a structural schematic diagram of each lateral expansion device that is folded in the present invention; Figure 3 is a structural schematic diagram of each lateral expansion device that is unfolded in the present invention; 3
| BL-5194 In the figures, 1, anchor head, 2, through hole, 3, anchor rod main body, 4, grout LU102510 discharging opening, 5, lateral expansion device, 501, steel sheet, 502 flexible belt, 503, barb, 6, grout stopping plug, 7, tray, 8, nut, 9, hinge
DETAILED DESCRIPTION Further description of the present invention will be made below.
As shown in the Fig.1 to Fig. 4, the grouting expansion anchor rod capable of improving the anti-pull effect includes the anchor head 1, the anchor rod main body 3, the tray 8 and the plurality of lateral expansion devices 5, the through hole 2 being formed along an axis at a center of the anchor rod main body 3, the anchor head 1 being fixed to one end of the anchor rod main body 3, the plurality of grout discharging openings 4being formed in the side part of the anchor rod main body 3, and the plurality of lateral expansion devices 5 being mounted on the outer side of the anchor rod main body 3 and covering the grout discharging openings 4, separately; and each lateral expansion device 5 comprising the steel sheet 501 and the flexible belt 502, one end of the steel sheet 501 being connected to the outer side of the anchor rod main body 3 through the hinge 9, and the flexible belt 502 covering the steel sheet 501 externally and the steel sheet 501 being tightly attached to the outer side of the anchor rod main body 3; and the tray 7 being mounted on the anchor rod main boy 3 and being limited by nuts 8; after injecting a grout liquid to the through hole 2, the grout liquid applying a pressure to the steel sheet 501from each grout discharging opening 4 to further make the other end of the steel sheet 501 be unfolded far away from the anchor rod body 3.
Further, the anchor rod further includes the grout stopping plug 6 sleeving the anchor rod main body 3.When the anchor rod is used, discharge of the grout liquid from the drilled hole can be alleviated, so that the grouting effect is guaranteed.
4
| BL-5194 Further, the steel sheet 501 is in the semi-arc fan shape, and the plurality of barbs LU102510 503 are distributed on the side surface, facing the anchor rod main body 3, of the steel sheet 501.By adopting the structure, it can be ensured that the unfolded steel sheet 501 generates the expansion force to the surrounding soil body to improve the anchoring effect, and meanwhile, the plurality of barbs 503 can be embedded into the rock body, so that the anti-pull force of the anchor rod is further improved.
The flexible belt 502 is made of a known flexible material, and the anchor head 1, the grout stopping plug 6, the tray and the nuts 8 are existing parts.
During use, the drilled hole is formed in the surrounding rock needed to be anchored first and the anchor rod main body 3 is inserted into the drilled hole, then the grout stopping plug 6 and the tray 7 are mounted on the anchor rod main body 3 and the tray 7 and the surrounding rock are fastened through the nuts 8, meanwhile, the grout stopping plug 6 seals the drilled hole, then the grout is injected into the through hole 2 through the other end of the anchor rod main body 3, the grout liquid applies the pressure to the steel sheet 501 of each lateral expansion device 5 from each grout discharging opening 4, so that the other end of the steel sheet 501 is unfolded far away from the anchor rod main body 3 and generates the expansion force to the surrounding soil body, as the external flexible belt 502 is made of the flexible material, the flexible belt 502 will be stretched and deformed as the steel sheet 501 is unfolded till the flexible belt 502 deforms to exceed a breakage critical value, and at the time, the flexible belt 502 breaks, so that the grout liquid starts to flow between the anchor rod main body 3 and the surrounding rocks, and meanwhile, the barbs 503 will be embedded into the rock body as the grout liquid flows out, and after the grout liquid is solidified, the anchoring process of the anchor rod is completed.
Claims (3)
1. A grouting expansion anchor rod capable of improving an anti-pull effect, characterized by comprising an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices, a through hole being formed along an axis at a center of the anchor rod main body, the anchor head being fixed to one end of the anchor rod main body, a plurality of grout discharging openings being formed in the side part of the anchor rod main body, and the plurality of lateral expansion devices being mounted on the outer side of the anchor rod main body and covering the grout discharging openings, separately; and each lateral expansion device comprising a steel sheet and a flexible belt, one end of the steel sheet being connected to the outer side of the anchor rod main body through a hinge, and the flexible belt covering the steel sheet externally and the steel sheet being tightly attached to the outer side of the anchor rod main body; and the tray being mounted on the anchor rod main boy and being limited by nuts; after injecting a grout liquid to the through hole, the grout liquid applying a pressure to the steel sheet from each grout discharging opening to further make the other end of the steel sheet be unfolded far away from the anchor rod body.
2. The grouting expansion anchor rod capable of improving the anti-pull effect according to claim 1, characterized by further comprising a grout stopping plug, the grout stopping plug being sleeved on the anchor rod main body.
3. The grouting expansion anchor rod capable of improving the anti-pull effect according to claim 1, characterized in that the steel sheet is in a semi-arc fan shape, and a plurality of barbs are distributed on the side surface, facing the anchor rod main body, of the steel sheet.
6
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110062393.9A CN112879055A (en) | 2021-01-18 | 2021-01-18 | Grouting expansion anchor rod capable of improving anti-pulling effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU102510B1 true LU102510B1 (en) | 2021-08-16 |
Family
ID=76048877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU102510A LU102510B1 (en) | 2021-01-18 | 2021-02-10 | Grouting expansion anchor rod capable of improving anti-pull effect |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112879055A (en) |
| LU (1) | LU102510B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108722A (en) * | 2021-11-02 | 2022-03-01 | 国网山东省电力公司烟台供电公司 | Power transmission iron tower foundation reinforcing structure with anchor rod and manufacturing method |
-
2021
- 2021-01-18 CN CN202110062393.9A patent/CN112879055A/en active Pending
- 2021-02-10 LU LU102510A patent/LU102510B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN112879055A (en) | 2021-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20210816 |