CN112879055A - Grouting expansion anchor rod capable of improving anti-pulling effect - Google Patents
Grouting expansion anchor rod capable of improving anti-pulling effect Download PDFInfo
- Publication number
- CN112879055A CN112879055A CN202110062393.9A CN202110062393A CN112879055A CN 112879055 A CN112879055 A CN 112879055A CN 202110062393 A CN202110062393 A CN 202110062393A CN 112879055 A CN112879055 A CN 112879055A
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- main body
- rod main
- steel sheet
- grout
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000694 effects Effects 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 239000011440 grout Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims description 9
- 239000011435 rock Substances 0.000 abstract description 25
- 238000004873 anchoring Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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 invention discloses a grouting expansion anchor rod capable of improving the uplift effect, which comprises an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices, wherein a through hole is formed in the center of the anchor rod main body along the axis, the anchor head is fixed at one end of the anchor rod main body, a plurality of grout discharge ports are formed in the lateral part of the anchor rod main body, and the lateral expansion devices are arranged on the outer side of the anchor rod main body and respectively cover the grout discharge ports; the lateral expansion device comprises a steel sheet and a flexible belt, one end of the steel sheet is connected with the outer side of the anchor rod main body through a hinge, and the flexible belt covers the outer part of the steel sheet and enables the steel sheet to be tightly attached to the outer side of the anchor rod main body; the tray is arranged on the anchor rod main body and is limited by the nut; according to the invention, the expansion and the expansion of the anchor rod are realized while grouting is carried out, so that the barbs are embedded into surrounding rocks and the expansion force applied to the surrounding rocks by the steel sheets, the anchoring range of the anchor rod to the surrounding rocks is effectively enlarged, and the anchor rod is prevented from slipping from the surrounding rocks in the use process.
Description
Technical Field
The invention relates to a grouting expansion anchor rod, in particular to a grouting expansion anchor rod capable of improving the uplift resistance effect.
Background
An anchor rod is a rod-shaped body that is anchored inside the rock mass. The anchor rod has many advantages: the tunnel boring machine has the advantages of saving timbers and steel, reducing supporting cost, having small tunneling section, small deformation of a tunnel, low maintenance cost, safe and light work, lightening physical labor, reducing ventilation resistance, being beneficial to one-time tunnel forming construction and accelerating tunneling speed, having wide application range and strong adaptability, reducing transportation volume and being beneficial to transportation and lifting of a mine.
However, the existing anchor rod cannot prevent the weathering of surrounding rocks, namely, the stripping of fractured rocks between the anchor rod and the anchor rod cannot be effectively avoided, and finally the anchor rod slips and loses the supporting effect.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the grouting expansion anchor rod capable of improving the uplift effect, the expansion of the anchor rod is realized at the same time of grouting, so that the barbs are embedded into surrounding rocks and the expansion force applied to the surrounding rocks by the steel sheets, the anchoring range of the anchor rod to the surrounding rocks is effectively enlarged, and the anchor rod is prevented from slipping out of the surrounding rocks in the using process.
In order to achieve the purpose, the invention adopts the technical scheme that: a slip casting expansion anchor rod capable of improving the uplift effect comprises an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices,
the center of the anchor rod main body is provided with a through hole along the axis, the anchor head is fixed at one end of the anchor rod main body, the side part of the anchor rod main body is provided with a plurality of grout discharging ports, the grout discharging ports are communicated with the through hole, and a plurality of lateral expansion devices are arranged on the outer side of the anchor rod main body and respectively cover the grout discharging ports;
the lateral expansion device comprises a steel sheet and a flexible belt, one end of the steel sheet is connected with the outer side of the anchor rod main body through a hinge, and the flexible belt covers the outer part of the steel sheet and enables the steel sheet to be tightly attached to the outer side of the anchor rod main body; the tray is arranged on the anchor rod main body and is limited by the nut; after grout is injected into the through hole, the grout exerts pressure on the steel sheet from each grout outlet, and then the other end of the steel sheet is far away from the anchor rod body to be unfolded.
Further, the anchor rod further comprises a grout stop plug, and the grout stop plug is sleeved on the anchor rod main body. Can slow down the thick liquid and discharge from drilling when using, guarantee the slip casting effect.
Further, the steel sheet shape is fan-shaped for the half arc, and the steel sheet distributes towards the side of stock main part has a plurality of barbs. By adopting the structure, the expansion force of the steel sheet on the surrounding soil body after being unfolded can be ensured, the anchoring effect is improved, and meanwhile, the plurality of barbs can be embedded into the rock body, so that the pulling resistance of the anchor rod is further improved.
Compared with the prior art, the invention adopts the mode of combining the anchor head, the anchor rod main body, the tray and the plurality of lateral expansion devices, firstly inserts the anchor rod main body into the surrounding rock to be anchored, then the grout stop plug and the tray are arranged on the anchor rod main body, the tray is fastened with the surrounding rock through the screw cap, then grouting is carried out in the through hole through the other end of the anchor rod main body, grout exerts pressure on the steel sheets of each lateral expansion device from each grout discharge port, so that the other ends of the steel sheets are far away from the anchor rod main body to be unfolded and generate expansion force on the surrounding soil body, and as the external flexible belts are made of flexible materials, it will stretch and deform along with the expansion of the steel sheet until the deformation of the flexible belt exceeds the fracture critical value, at the moment, the flexible belt is fractured, slurry begins to flow into the space between the anchor rod main body and the surrounding rock, and the barbs can be embedded into the rock along with the outflow of the slurry, so that the pulling resistance of the anchor rod is effectively improved after the slurry is solidified; therefore, the expansion and the unfolding of the anchor rod are realized while grouting is carried out, so that the barbs are embedded into surrounding rocks and the expansion force applied to the surrounding rocks by the steel sheets, the anchoring range of the anchor rod to the surrounding rocks is effectively enlarged, and the anchor rod is prevented from slipping out of the surrounding rocks in the using process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic undeployed view of the lateral expansion device of the present invention;
FIG. 3 is a schematic view of the lateral expansion device of the present invention after deployment.
In the figure: 1. anchor head, 2, through-hole, 3, stock main part, 4, arrange thick liquid mouth, 5, side direction expansion device, 501, steel sheet, 502, flexible band, 503, barb, 6, grout stop plug, 7, tray, 8, nut, 9, hinge.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1 to 3, the present invention comprises an anchor head 1, a bolt body 3, a tray 7 and a plurality of lateral expansion means 5,
the center of the anchor rod main body 3 is provided with a through hole 2 along the axis, the anchor head 1 is fixed at one end of the anchor rod main body 3, the side part of the anchor rod main body 3 is provided with a plurality of grout discharging ports 4, the plurality of grout discharging ports 4 are communicated with the through hole 2, and a plurality of lateral expansion devices 5 are arranged on the outer side of the anchor rod main body 3 and respectively cover the grout discharging ports 4;
the lateral expansion device 5 comprises a steel sheet 501 and a flexible belt 502, one end of the steel sheet 501 is connected with the outer side of the anchor rod main body 3 through a hinge 9, and the flexible belt 502 covers the outer part of the steel sheet 501 and enables the steel sheet 501 to be tightly attached to the outer side of the anchor rod main body 3; the tray 7 is arranged on the anchor rod main body 3 and is limited by the nut 8; after grout is injected into the through hole 2, the grout applies pressure to the steel sheet 501 from each grout outlet 4, and the other end of the steel sheet 501 is spread away from the anchor body 3.
Further, the anchor rod further comprises a grout stop plug 6, and the grout stop plug 6 is sleeved on the anchor rod main body 3. Can slow down the thick liquid and discharge from drilling when using, guarantee the slip casting effect.
Further, the shape of the steel sheet 501 is a half arc sector, and a plurality of barbs 503 are distributed on the side surface of the steel sheet 501 facing the anchor rod main body 3. By adopting the structure, the expansion force of the steel sheet 501 on the surrounding soil body after expansion can be ensured, the anchoring effect is improved, and meanwhile, the plurality of barbs 503 can be embedded into the rock body, so that the pulling resistance of the anchor rod is further improved.
The flexible band 502 is made of known flexible materials, and the anchor head 1, the grout stop plug 6, the tray 7 and the screw cap 8 are all existing components.
When in use, firstly, a drill hole is arranged on the surrounding rock to be anchored, the anchor rod main body 3 is inserted into the drill hole, then the grout stop plug 6 and the tray 7 are arranged on the anchor rod main body 3, the tray 7 is fastened with the surrounding rock through the screw cap 8, meanwhile, the grout stop plug 6 is sealed for the drilling hole, then grouting is carried out into the through hole 2 through the other end of the anchor rod main body 3, grout presses the steel sheets 501 of each lateral expansion device 5 from each grout outlet 4, so that the other ends of the steel sheets 501 are far away from the anchor rod main body 3 and expand to the surrounding soil body, and as the outer flexible belts 502 are made of flexible materials, it will stretch and deform as the steel sheet 501 expands until the flexible straps 502 deform beyond the breaking threshold, at which point the flexible straps 502 break, and then the thick liquid begins to flow into between stock main part 3 and the country rock, and barb 503 can be embedded into the rock body along with the outflow of thick liquid simultaneously, treats the thick liquid solidification back, accomplishes the anchor process of stock.
Claims (3)
1. A grouting expansion anchor rod capable of improving the uplift effect is characterized by comprising an anchor head, an anchor rod main body, a tray and a plurality of lateral expansion devices,
the center of the anchor rod main body is provided with a through hole along the axis, the anchor head is fixed at one end of the anchor rod main body, the side part of the anchor rod main body is provided with a plurality of grout discharging ports, the grout discharging ports are communicated with the through hole, and a plurality of lateral expansion devices are arranged on the outer side of the anchor rod main body and respectively cover the grout discharging ports;
the lateral expansion device comprises a steel sheet and a flexible belt, one end of the steel sheet is connected with the outer side of the anchor rod main body through a hinge, and the flexible belt covers the outer part of the steel sheet and enables the steel sheet to be tightly attached to the outer side of the anchor rod main body; the tray is arranged on the anchor rod main body and is limited by the nut; after grout is injected into the through hole, the grout exerts pressure on the steel sheet from each grout outlet, and then the other end of the steel sheet is far away from the anchor rod body to be unfolded.
2. The grouting expansion anchor rod capable of improving the pulling-out resistance effect according to claim 1, further comprising a grout stop plug, wherein the grout stop plug is sleeved on the anchor rod main body.
3. The grouting expansion anchor rod capable of improving the pulling-out resistance effect according to claim 1, wherein the steel sheet is shaped like a half arc sector, and a plurality of barbs are distributed on the side surface of the steel sheet facing the anchor rod main body.
Priority Applications (2)
| 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 |
| LU102510A LU102510B1 (en) | 2021-01-18 | 2021-02-10 | Grouting expansion anchor rod capable of improving anti-pull effect |
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 |
|---|---|
| CN112879055A true CN112879055A (en) | 2021-06-01 |
Family
ID=76048877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110062393.9A Pending CN112879055A (en) | 2021-01-18 | 2021-01-18 | Grouting expansion anchor rod capable of improving anti-pulling effect |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112879055A (en) |
| LU (1) | LU102510B1 (en) |
Cited By (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
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| LU102510B1 (en) | 2021-08-16 |
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