CN206769935U - A kind of top expands grouted anchor bar - Google Patents
A kind of top expands grouted anchor bar Download PDFInfo
- Publication number
- CN206769935U CN206769935U CN201720604838.0U CN201720604838U CN206769935U CN 206769935 U CN206769935 U CN 206769935U CN 201720604838 U CN201720604838 U CN 201720604838U CN 206769935 U CN206769935 U CN 206769935U
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- CN
- China
- Prior art keywords
- anchor
- anchor pole
- reinforcing body
- expansion reinforcing
- expansion
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- 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.)
- Expired - Fee Related
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Abstract
A kind of top expansion grouted anchor bar is the utility model is related to, belongs to anchor pole field.The utility model includes anchor pole head, anchor rod body, spiral thread on anchor bolt section, pallet, injected hole, nut, expansion reinforcing body；Anchor rod body one end is anchor pole head, and the other end is spiral thread on anchor bolt section, and anchor rod body is hollow circular cylinder, and inside is provided with slip casting passage, and surface is interval with through hole.Anchor pole crown end is provided with truncated cone-shaped fastener, logical spiral thread on anchor bolt section is connected through a screw thread through anchor rod pallet board with nut, expansion reinforcing body is hollow structure, it is interior through being slightly less than anchor pole head, when the extrusion expansion reinforcing body of anchor pole head, cylindrical fastener causes expansion reinforcing body to radially expand while clasping expansion reinforcing body neck, increase grouted anchor bar end and the contact frictional resistance of country rock hole wall, improves first anchor-hold of the grouted anchor bar at anchoring initial stage.The utility model adds the anchoring property of anchor pole on the whole, and processing is simple, and the usage amount of anchor pole in unit area is reduced while anchoring property effect is ensured.
Description
Technical field
Bolt support technology field is the utility model is related to, especially a kind of increase grouted anchor bar contact with country rock hole wall
The grouted anchor bar of frictional force.
Background technology
Suspension roof support has a wide range of applications in Tunnel Engineering, but with the extension of tunnel excavation scope, excavates bar
Part is more and more difficult, and especially under the influence of the complicated factors such as great burying, complicated structure, supporting turns into what tunnel construction excavated
Important problem.The residual slopes fault disruption zone Karst Tunnel of Shallow-buried has the characteristics that low intensity, cementing properties difference, after tunnel excavation,
It is easily caused country rock and produces large deformation under bias condition, causes supporting construction to fail, once anchoring segment fault, anchor pole can not just be sent out
Substantial role is waved, the safety in tunnel is by serious threat.
China Patent Publication No. CN205296150U authorized " a kind of new hangnail anchor pole " on 01 07th, 2016, should
The expansion type roof bolt that utility model is proposed devises a kind of anchor pole hangnail and is placed in bolt body, and bolt body is driven into rock
When middle, high strong spring meeting reaction anchor pole hangnail, anchor pole hangnail is set to be pierced into palisades, but the making step of this anchor pole is more
It is complicated；China Patent Publication No. CN205475223U authorized a kind of " high pre-stress with expansion sleeve on 01 11st, 2016
Anchor pole ", the expansion anchor rod that the utility model is proposed are by tightening nut, anchor pole head is covered generation with bolt expansion and slide relatively
When dynamic, bolt expansion set is expanded by the expansive force of anchor pole head, although the device can expand its end, can cause anchor pole
A segment distance is displaced outwardly, reduces certain anchoring section.
Above patent is on the basis of conventional anchor, and anchoring effect is realized by adding other expansion gears, so as to reach
To the purpose of stabilizing surrounding rock.But certain anchor pole manufacture difficulty be present, manufacturing process is complicated, or the anchor measure taken can subtract
Few certain anchor force, it is impossible to reach grouted anchor bar anchor force at initial stage, it is impossible to meet engineering demand；Therefore, it is necessary to develop one kind
Certain anchor pole power, manufacturing process uncomplicated novel slurry filling anchor pole are provided in anchoring initial stage, farthest to send out
Wave the effect of grouted anchor bar, there is provided construction quality.
The content of the invention
In order to overcome, the contact area of existing the grouted anchor bar body of rod and tunnel surrounding is small, the body of rod can not provide enough frictions
The defects of power, the utility model provide a kind of top expansion grouted anchor bar, and the grouted anchor bar can not only provide end anchorage power, and
And the anchoring section inside rock mass is not reduced also, there is provided do enough anchor forces, while expansion gear can also be with slurries together
The consolidation effect of similar reinforced-concrete is played, makes it have enough shearing resistances, tensile strength, it is ensured that tunnel support monolithic stability
Property.
Technical scheme is used by the utility model solves its technical problem：
（1）A kind of described top expansion grouted anchor bar, including anchor pole head, anchor rod body, spiral thread on anchor bolt section, pallet, note
Hole, nut, expansion reinforcing body are starched, anchor rod body is hollow circular cylinder, and inside is provided with slip casting passage, and surface is interval with through hole.
（2）The first distal process of described anchor pole goes out, and nose section is truncated cone-shaped fastener, and truncated cone-shaped base diameter is slightly larger than anchor pole bar
Body diameter, truncated cone-shaped top diameter is equal with anchor rod body diameter, mainly convenient to be linked together with expander, forms one
It is overall.
（3）Expansion reinforcing body is hollow circular cylinder, and one end is closed, and the other end is not closed, and the diameter of expansion reinforcing body is smaller
In anchor rod body diameter, the external wall of expansion reinforcing makes the quartering parallel to the direction of axle to outer wall, to the expansion reinforcing body fourth class
The neck perpendicular to axle is made on the outer wall divided, when the extrusion expansion reinforcing body of anchor pole head, 4 are uniformly distributed on truncated cone-shaped fastener
Individual prominent fastener causes expansion reinforcing body to radially expand while buckling into the neck of expansion reinforcing body.
The beneficial effects of the utility model are：According to tunnel surrounding, geological condition 1. anchor pole head can be selected to add expansion
The extruding degree of solid, the outer wall stretching degree of expansion reinforcing body, stretching degree is bigger, and the cohesive force of anchor pole end and country rock is got over
By force, supporting effect is better, and the anchor force of anchor pole is ensure that while realizing high pre-stress.2. when on anchor pole head and expansion reinforcing body
Lay corresponding neck to interlock, can ensure that whole anchor bar body is fully entered in anchor hole, in the same of increase anchor pole end anchorage power
When ensure the anchor force of whole anchor pole；3. expansion reinforcing body and slurries form the reinforcement region of small range between country rock, anchor pole,
With preferable shearing resistance, tensile strength, it is ensured that tunnel support resistance to overturning, there is provided higher prestressing force, in equal supporting
Under the conditions of can reduce anchor pole distribution density so that reduce construction workload.
Brief description of the drawings
The utility model is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation after the utility model engineering construction.
Fig. 3 is structural representation when expansion reinforcing body uses.
Fig. 4 is anchor pole head detailed structure view.
Each label in figure：1. anchor pole head, 2. anchor rod bodies, 3. through holes, 4. pallets, 5. nuts, 6. spiral thread on anchor bolt sections, 7. notes
Starch hole, 8. expansion reinforcing bodies, 9. necks, 10. truncated cone-shaped fasteners.
Embodiment
The utility model is further described with specific embodiment below in conjunction with the accompanying drawings, so as to skill in the art
Art personnel understand the utility model.
In Fig. 1, a kind of top expansion grouted anchor bar, by anchor pole is first 1, anchor rod body 2, through hole 3, pallet 4, nut 5, anchor
Bar thread segment 6, injected hole 7, expansion reinforcing body 8 form, and first 1 one end of anchor pole is truncated cone-shaped fastener 10, the bottom of truncated cone-shaped fastener 10
Portion's diameter is slightly larger than the diameter of anchor rod body 2, and the top diameter of truncated cone-shaped fastener 10 is equal with the diameter of anchor rod body 2.Expansion reinforcing
8 unclosed end of body is connected with anchor pole head, by the tail end applying power of anchor rod body 2 so that anchor pole first 1 enters expansion reinforcing body
Inside 8.
In fig. 2, because the diameter of expansion reinforcing body 8 is slightly less than the diameter of anchor rod body 2, according to tunnel surrounding, geology feelings
Condition selects extruding degree, the outer wall stretching degree of expansion reinforcing body 8 of the anchor pole first 1 to expansion reinforcing body 8, when anchor pole first 1 enters
During to expansion reinforcing 8 inside of body, the outer wall of expansion reinforcing body 8 can externally expand, and be in contact with surrounding rock body, in the work of anchor pole first 1
Under, the outer wall of expansion reinforcing body 8 extruding rock mass.Meanwhile the base diameter of truncated cone-shaped fastener 10 is slightly larger than the diameter of anchor rod body 2,
The top diameter of truncated cone-shaped fastener 10 is equal with the diameter of anchor rod body 2, and 4 prominent fasteners 11 are uniformly distributed on truncated cone-shaped fastener can
To buckle into the neck 9 of expansion reinforcing body 8, both form an entirety, increase contact friction of the grouted anchor bar with country rock hole wall
Resistance, improve first anchor-hold of the grouted anchor bar at anchoring initial stage.
Claims (2)
1. a kind of top expands grouted anchor bar, by anchor pole head（1）, anchor rod body（2）, through hole（3）, pallet（4）, nut（5）, anchor
Bar thread segment（6）, injected hole（7）, expansion reinforcing body（8）Composition, it is characterised in that：Anchor pole head（1）One end is truncated cone-shaped fastener
（10）, truncated cone-shaped fastener（10）Base diameter be slightly larger than anchor rod body（2）Diameter, truncated cone-shaped fastener（10）Top diameter with
Anchor rod body（2）Diameter is equal, truncated cone-shaped fastener（10）On be uniformly distributed 4 prominent fasteners（11）.
2. a kind of top expansion grouted anchor bar according to claim 1, it is characterized in that：Expansion reinforcing body（8）For hollow circle
Cylinder, one end closing, the other end are not closed, expansion reinforcing body（8）Diameter be slightly less than anchor rod body（2）Diameter, expansion reinforcing
Body（8）Outside wall parallel makes 4 deciles to outer wall in the direction of axle, to expansion reinforcing body（8）Made on the outer wall of decile perpendicular to
The neck of axle（9）, 4 prominent fasteners are uniformly distributed on truncated cone-shaped fastener（11）Expansion reinforcing body can be buckled into（8）Neck（9）
It is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720604838.0U CN206769935U (en) | 2017-05-27 | 2017-05-27 | A kind of top expands grouted anchor bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720604838.0U CN206769935U (en) | 2017-05-27 | 2017-05-27 | A kind of top expands grouted anchor bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206769935U true CN206769935U (en) | 2017-12-19 |
Family
ID=60639249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720604838.0U Expired - Fee Related CN206769935U (en) | 2017-05-27 | 2017-05-27 | A kind of top expands grouted anchor bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206769935U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083668A (en) * | 2018-08-20 | 2018-12-25 | 中钢集团马鞍山矿山研究院有限公司 | A kind of grouting and reinforcing anchor pole suitable for high stress breaking surrounding rock supporting |
| CN114017085A (en) * | 2021-10-14 | 2022-02-08 | 中煤科工开采研究院有限公司 | Roadway supporting device and method for thick-layer loose coal rock mass difficult to anchor |
-
2017
- 2017-05-27 CN CN201720604838.0U patent/CN206769935U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083668A (en) * | 2018-08-20 | 2018-12-25 | 中钢集团马鞍山矿山研究院有限公司 | A kind of grouting and reinforcing anchor pole suitable for high stress breaking surrounding rock supporting |
| CN109083668B (en) * | 2018-08-20 | 2020-05-19 | 中钢集团马鞍山矿山研究院有限公司 | Be suitable for slip casting reinforcing stock of high stress broken country rock support usefulness |
| CN114017085A (en) * | 2021-10-14 | 2022-02-08 | 中煤科工开采研究院有限公司 | Roadway supporting device and method for thick-layer loose coal rock mass difficult to anchor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20180527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |