CN111608711A - Resistance-increasing expansion shell deformation anchor rod - Google Patents
Resistance-increasing expansion shell deformation anchor rod Download PDFInfo
- Publication number
- CN111608711A CN111608711A CN202010586502.2A CN202010586502A CN111608711A CN 111608711 A CN111608711 A CN 111608711A CN 202010586502 A CN202010586502 A CN 202010586502A CN 111608711 A CN111608711 A CN 111608711A
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- CN
- China
- Prior art keywords
- shell
- anchor rod
- plate
- sleeve
- anchor
- 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
- 239000011440 grout Substances 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 28
- 230000008093 supporting effect Effects 0.000 abstract description 9
- 239000002002 slurry Substances 0.000 description 12
- 238000004873 anchoring Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- 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
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt material
-
- 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
- E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid
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 resistance-increasing shell-expanding deformation anchor rod, which comprises an anchor rod body, a sleeve, a movable nested push plate, a shell-expanding plate and an anchor head shell, wherein the sleeve is fixedly connected with the anchor rod body; the sleeve is sleeved outside the anchor rod body, and a grouting channel for filling grout is formed between the sleeve and the anchor rod body; a grouting stop plug and a nut are arranged on the anchor rod body at one end of the grouting channel, the other end of the grouting channel is connected with the anchor head shell, the movable nested push plate is arranged inside the anchor head shell, and a cavity formed between the movable nested push plate and the anchor head shell is communicated with the grouting channel; and shell expansion plates are arranged at the outer ends of the movable nesting push plates, and at least two shell expansion plates can slide along a sliding groove in the anchor head shell. The anchor rod shell expansion anchor head can slide under the pushing of the movable nut at the anchor head, so that the supporting resistance is increased, the excessive deformation of surrounding rock can be effectively inhibited, and the loosening pressure is avoided.
Description
Technical Field
The invention belongs to the field of geotechnical engineering anchoring, and particularly relates to a resistance-increasing shell-expanding deformation anchor rod.
Background
The spray anchor support is an extremely important support means in the process of constructing a roadway. With the continuous development of deep mining engineering and deep tunnels, in the construction process of the tunnels, the geological conditions of tunnel crossing are more and more complex, surrounding rocks often have the characteristic of larger deformation, and the stability problem of the surrounding rocks is gradually highlighted. Under the pressure action of surrounding rocks, the conventional anchor rod is not easy to adapt to the large deformation of the surrounding rocks and is broken and invalid, a large amount of manpower and material resources are consumed, and the expected supporting effect cannot be achieved. In order to adapt to the deformation of the surrounding rock, the anchor rod has certain deformation capacity, the surrounding rock releases partial deformation energy under the controllable deformation condition, and meanwhile, the anchor rod can provide certain supporting resistance to limit the overlarge deformation of the surrounding rock.
The existing developed deformable anchor rods have the problems of complex technical requirements, high production cost, single functionality and the like, and the popularization and application of the deformable anchor rods in the field of geotechnical engineering support are greatly restricted.
Disclosure of Invention
The invention aims to provide a composite function resistance-increasing expansion shell deformation anchor rod. The anchor rod is simple in principle, simple and convenient to operate and high in feasibility. The anchor rod shell expansion anchor head can slide under the pushing of the movable nut at the anchor head, so that the supporting resistance is increased, the excessive deformation of surrounding rock can be effectively inhibited, and the loosening pressure is avoided.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
a resistance-increasing shell-expanding deformation anchor rod comprises an anchor rod body, a sleeve, a movable nested push plate, a shell-expanding plate and an anchor head shell;
the sleeve is sleeved outside the anchor rod body, and a grouting channel for filling grout is formed between the sleeve and the anchor rod body; a grouting stop plug and a nut are arranged on the anchor rod body at one end of the grouting channel, the other end of the grouting channel is connected with the anchor head shell, the movable nested push plate is arranged inside the anchor head shell, and a cavity formed between the movable nested push plate and the anchor head shell is communicated with the grouting channel; the outer end of the movable nested push plate is provided with a shell expanding plate; when the grout stop plug extrudes the sleeve under stress, grout can enter the cavity of the anchor head shell along the sleeve to push the movable nested push plate to move and drive the shell expansion plate to slide and open along the sliding groove.
Optionally, a backing plate is arranged between the nut and the grout stop plug.
Optionally, the sleeve is made of a radially deformable material.
Optionally, the casing is a threaded steel casing.
Optionally, the sliding groove is arranged at the end part of the anchor rod body, the end part of the anchor rod body penetrates into the anchor head shell, and the movable nested push plate is sleeved on the end part of the anchor rod body.
Optionally, the shell expansion plate is further connected with a shell expansion plate sliding block, the end of the shell expansion plate is hinged to the movable nesting push plate, and the shell expansion plate sliding block and the sliding groove slide in a matched mode.
Optionally, the outer side of the shell expansion plate is rib-shaped, and the plate body has an inclination.
Optionally, the shell expansion plate sliding block is provided with a hook-shaped structure, and the hook-shaped structure is connected with the sliding groove.
Optionally, at least two of the shell expansion plate sliding blocks are provided.
Optionally, the outer wall main body of the anchor rod body is of a smooth structure, and the end part of the anchor rod body provided with the grout stop plug is of a threaded structure.
Compared with the prior art, the invention is characterized in that:
the anchor rod is characterized in that the external threaded sleeve is used for grouting, so that the threaded sleeve is in close contact with surrounding rocks, and the thread of the threaded sleeve increases the supporting resistance. Meanwhile, in the grouting process, grout enters the anchor head to push the sliding embedded plate, so that the shell expansion plate at the anchor head can be simultaneously and effectively expanded to be in close contact with surrounding rock at the anchor head, the supporting resistance at the anchor head is increased, and the defect that the shell expansion plates of the traditional shell expansion anchor rod cannot be simultaneously expanded is overcome. When the thick liquid solidifies, the volume increase makes the screw thread sleeve pipe warp, can be so that sleeve pipe and country rock in close contact with, but the stock body is glossy reinforced bar material, can with the slip casting body between produce relative deformation, further release the pressure of country rock, reach and let the effect of pressing the deformation.
This stock has all carried out the resistance-increasing part in anchor head and stock body department for the anchor of stock increases substantially, and simultaneously after the thick liquid solidifies, the stock body can carry out relative dislocation deformation with the sleeve pipe thick liquid, can let the partial pressure of country rock obtain the release shape, makes the country rock deformation energy obtain the dissipation of certain degree. The supporting resistance provided by the anchor rod is increased, so that the excessive deformation of the surrounding rock can be effectively inhibited, and the loosening pressure is avoided. The anchor rod is simple in principle, multiple in function and high in feasibility.
Drawings
FIG. 1 is a schematic structural view provided by the present invention;
FIG. 2 is a cross-sectional view of a rod segment of the present invention;
FIG. 3 is a cross-sectional view of the present invention at the anchor head;
FIG. 4 is a cross-sectional view of the anchor head of the present invention;
in the figure: 1. an anchor rod body; 2. a nut; 3. a base plate; 4. a grout stopping plug; 5. slurry; 6. a sleeve; 7. a movable nesting push plate; 8. a shell expanding plate; 9. a chute; 10. an anchor head housing; 11. and a shell expansion plate sliding block.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the anchor rod with the deformation of the expansion shell comprises an anchor rod body 1, a fixing nut 2, a steel backing plate 3, a grout stop plug 4, a threaded steel sleeve 6, a movable nested push plate 7, a sliding groove 9 and an expansion shell plate 8.
The threaded steel sleeve 6 is sleeved outside the anchor rod body 1, and a grouting channel filled with grout 5 is formed between the threaded steel sleeve 6 and the anchor rod body 1; a grout stop plug 4 and a nut 2 are arranged on the anchor rod body 1 at one end of the grouting channel, the other end of the grouting channel is connected with the anchor head shell 10, the movable nested push plate 7 is arranged inside the anchor head shell 10, and a cavity formed between the movable nested push plate 7 and the anchor head shell 10 is communicated with the grouting channel; the outer end of the movable nesting push plate 7 is provided with shell expansion plates 8, and at least two shell expansion plates 8 can slide along a sliding groove 9 arranged in an anchor head shell 10.
2. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: and a backing plate 3 is arranged between the nut 2 and the grout stop plug 4.
The tail part of the anchor rod body 1 penetrates through the threaded sleeve 6 and the grout stop plug 4 and is screwed up through the nut 2, so that the backing plate 3 is tightly attached to the wall; the threaded sleeve 6 is communicated with the anchor head, and grout can enter the anchor head along the sleeve; the grout can push the movable nesting plate 7 to slide outwards after entering the anchor head, and the movable nesting plate 7 pushes the shell expansion plate 8 to slide and open in the sliding groove 9 under the pushing of the grout.
As shown in fig. 2, the bolt body 1 is a smooth round material and is surrounded by a threaded sleeve 6 and a grout material 5.
As shown in fig. 3, the expansion plate 8 and the sliding groove 9 are wrapped in the anchor head housing 10 without sliding.
As shown in fig. 4, grout material 5 can enter the interior of the anchor head through the threaded sleeve 6, pushing the movable nesting plate 7 to slide outwards; the movable nesting plate 7 and the chute 9 can slide relatively under the pushing of the slurry; the shell expansion plate sliding block 11 can slide along the sliding groove 9, and stops sliding due to the hook-shaped structure after reaching the top of the sliding groove 9; the shell expansion plate 8 can be effectively expanded and tightly combined with surrounding rock at the anchor head to increase resistance.
The integral part of the anchor rod body penetrates into a steel sleeve which can be grouted, the head part of the sleeve is connected with the anchor head, the sleeve is externally provided with threads, when the sleeve is contacted with surrounding rocks, the supporting resistance can be increased, grouting inside the casing pipe, when the grout is solidified, the anchor rod body can produce relative dislocation according to the difference of materials to achieve the effect of yielding, in addition, the grout can enter the anchor head along the casing pipe to push the movable embedded plate at the anchor head to jack up the shell expanding plate, so that the shell expanding plate slides and opens along the sliding groove, the tail part of the casing pipe is connected with the grout stopping plug, after grouting is finished, can be blocked by the grout stop plug, the anchor rod passes through the grout stop plug to be connected with the steel backing plate and is screwed up by the nut at the tail part of the anchor rod body, the liner plate is tightly attached to the rock wall, the shell expansion head at the anchor head is expanded at the stable surrounding rock to increase the stress area at the anchor head, and the shell expansion anchor head, the anchor rod body and the groutable sleeve form the shell expansion deformation anchor rod capable of increasing resistance.
In the above scheme, the present invention also has a further defined technical scheme:
furthermore, the threaded sleeve is communicated with the anchor head part and has certain radial deformation capacity, and when the size of the grout is increased after solidification, the grout can deform radially along with the increase of the size of a new grouting material.
Further, the movable embedded plate can move outwards along the sliding groove during grouting to push the shell expansion plate to slide.
Furthermore, the outer side of the expansion shell plate is rib-shaped, the plate body has a certain inclination, the plate body can slide in the sliding groove through the sliding block of the plate body, and after the plate body reaches the top of the sliding groove, the expansion shell plate can be clamped at the top due to the hook-shaped sliding block.
Further, the tail part of the base plate is provided with an external thread connected with the nut.
In a preferred embodiment, a backing plate 3 is arranged between the nut 2 and the grout stop plug 4. The anchor rod body 1 is made for the deformable material, 1 outer wall main part of anchor rod body is smooth structure, 1 tip of anchor rod body that grout stopping stopper 4 set up is the helicitic texture.
As a preferred embodiment, the sliding groove 9 is arranged at the end part of the anchor rod body 1, the end part of the anchor rod body 1 penetrates through the inside of the anchor head shell 10, and the movable nesting push plate 7 is sleeved on the end part of the anchor rod body 1.
As a preferred embodiment, the shell expansion plate 8 is further connected with a shell expansion plate sliding block 11, the end of the shell expansion plate 8 is hinged with the movable nesting push plate 7, and the shell expansion plate sliding block 11 is matched with the sliding groove 9 to slide. And a sawtooth structure is arranged on the outer side of the shell expansion plate 8. The shell expansion plate sliding block 11 is provided with a hook-shaped structure, and the hook-shaped structure is connected with the sliding groove 9.
Can carry out the slip casting through threaded steel sleeve 6, thick liquid accessible threaded steel sleeve 6 gets into the anchor head, and the thick liquid solidifies the volume increase for threaded sleeve warp thereupon, and then the resistance is strutted to the increase stock system.
During grouting, grout can enter the anchor head through a grouting channel formed by the sleeve and the anchor head, the movable nested push plate 7 moves outwards under the pushing and extruding of the grout, and the two shell expansion plates 8 can slide in the sliding grooves 9 and open outwards under the action of the movable nested push plate 7.
After the shell expansion plate 8 is expanded, grouting slurry can flow out through the sliding groove 9 and anchor the anchor head.
After grouting is finished, grout is condensed into solid, the grout and the outer sleeve threaded steel pipe 7 are in close contact with a rock body, and when the anchor rod is stressed, the anchor rod body 1 can generate relative deformation, so that partial pressure of surrounding rock is released.
When the anchor rod is used, firstly, the anchor rod body 1 is combined with the threaded sleeve 6 and the anchor head, a drill hole is drilled in advance, then grouting is carried out through the threaded sleeve 6, slurry enters the anchor head shell 10 through the threaded sleeve 6, the movable embedded plate 7 is pushed to slide outwards, the expansion shell plate 8 also slides outwards along the sliding groove 9 and opens, after the expansion shell plate 8 slides and opens, the slurry can flow out of the sliding groove 9 to anchor the anchor head section, when the slurry begins to overflow from the drilled hole, the slurry stop plug 4 is arranged on the threaded sleeve 9 to perform slurry plugging, after the slurry is initially set, the steel base plate 3 can be arranged at the tail part of the rod body 1, and finally, the nut 2 is screwed tightly to enable the base plate 3 to be tightly attached to the roadway wall.
The principle of the invention is to optimize the traditional shell-expanding anchor rod, solve the defect that the shell-expanding plates of the traditional shell-expanding anchor rod cannot slide simultaneously, and simultaneously arrange a resistance-increasing yielding part on the rod body part to form a resistance-increasing variability system. When the anchor rod is installed, the shell expansion plate 8 is effectively expanded to be tightly attached to surrounding rock at the anchor head part under the pushing of slurry through grouting so as to increase the anchoring force at the anchor head part. Meanwhile, the volume of the slurry is increased after solidification, so that the threaded sleeve 6 is radially deformed, and the supporting resistance is increased again. In addition, because the rod body anchoring section is made of smooth round materials, the rod body anchoring section can be dislocated and deformed relative to the threaded sleeve 6 and the slurry solidified body 5, so that partial surrounding rock deformation energy is released, the surrounding rock deformation energy is dissipated, and the large deformation of the surrounding rock is effectively inhibited.
The resistance-increasing expansion shell deformation anchor rod can greatly improve the support resistance of an anchor rod system, can release partial surrounding rock deformation energy, can effectively inhibit the surrounding rock from generating excessive deformation, and cannot cause loosening pressure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides an increase and hinder shell deformation stock that rises which characterized in that: comprises an anchor rod body, a sleeve, a movable nested push plate, a shell expansion plate and an anchor head shell;
the sleeve is sleeved outside the anchor rod body, and a grouting channel for filling grout is formed between the sleeve and the anchor rod body; a grouting stop plug and a nut are arranged on the anchor rod body at one end of the grouting channel, the other end of the grouting channel is connected with the anchor head shell, the movable nested push plate is arranged inside the anchor head shell, and a cavity formed between the movable nested push plate and the anchor head shell is communicated with the grouting channel; the outer end of the movable nested push plate is provided with a shell expanding plate; when the grout stop plug extrudes the sleeve under stress, grout can enter the cavity of the anchor head shell along the sleeve to push the movable nested push plate to move and drive the shell expansion plate to slide and open along the sliding groove.
2. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: and a backing plate is arranged between the nut and the grout stop plug.
3. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: the sleeve is made of a radially deformable material.
4. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: the sleeve is a threaded steel sleeve.
5. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: the spout sets up at stock body tip, and inside the anchor head shell was penetrated to the stock body tip, the nested push pedal cover of activity was established on stock body tip.
6. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: the shell expansion plate is also connected with a shell expansion plate sliding block, the end part of the shell expansion plate is hinged with the movable nested push plate, and the shell expansion plate sliding block is matched with the sliding groove to slide.
7. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 6, wherein: the outer side of the shell expansion plate is rib-shaped, and the plate body has inclination.
8. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 6, wherein: the shell expansion plate sliding block is provided with a hook-shaped structure, and the hook-shaped structure is connected with the sliding groove.
9. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: and at least two shell expansion plate sliding blocks are arranged.
10. A resistance-increasing expansion shell deformation anchor rod as claimed in claim 1, wherein: the anchor rod body outer wall main part is smooth structure, the anchor rod body tip that only thick liquid stopper set up is the helicitic texture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586502.2A CN111608711A (en) | 2020-06-24 | 2020-06-24 | Resistance-increasing expansion shell deformation anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010586502.2A CN111608711A (en) | 2020-06-24 | 2020-06-24 | Resistance-increasing expansion shell deformation anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111608711A true CN111608711A (en) | 2020-09-01 |
Family
ID=72199102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010586502.2A Pending CN111608711A (en) | 2020-06-24 | 2020-06-24 | Resistance-increasing expansion shell deformation anchor rod |
Country Status (1)
| Country | Link |
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| CN (1) | CN111608711A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988825A (en) * | 2023-09-25 | 2023-11-03 | 中国矿业大学(北京) | Resistance-increasing large-deformation grouting anchor rod and application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888327A (en) * | 2006-07-24 | 2007-01-03 | 吴德兴 | Anti-corrosion rockbolt with sack body |
| KR101255811B1 (en) * | 2012-03-05 | 2013-04-17 | 지오텍엔지니어링 주식회사 | Anchor of extension type |
| KR102037313B1 (en) * | 2019-01-30 | 2019-10-28 | 박태영 | Chiropractic four-way diffusion anchor assembly |
| CN212454487U (en) * | 2020-06-24 | 2021-02-02 | 西安建筑科技大学 | Resistance-increasing expansion shell deformation anchor rod |
-
2020
- 2020-06-24 CN CN202010586502.2A patent/CN111608711A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1888327A (en) * | 2006-07-24 | 2007-01-03 | 吴德兴 | Anti-corrosion rockbolt with sack body |
| KR101255811B1 (en) * | 2012-03-05 | 2013-04-17 | 지오텍엔지니어링 주식회사 | Anchor of extension type |
| KR102037313B1 (en) * | 2019-01-30 | 2019-10-28 | 박태영 | Chiropractic four-way diffusion anchor assembly |
| CN212454487U (en) * | 2020-06-24 | 2021-02-02 | 西安建筑科技大学 | Resistance-increasing expansion shell deformation anchor rod |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116988825A (en) * | 2023-09-25 | 2023-11-03 | 中国矿业大学(北京) | Resistance-increasing large-deformation grouting anchor rod and application method |
| CN116988825B (en) * | 2023-09-25 | 2023-12-05 | 中国矿业大学(北京) | Resistance-increasing large-deformation grouting anchor rod and application method |
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