CN114542142A - Self-locking large-deformation energy-absorbing anchor rod and anchor rod device - Google Patents
Self-locking large-deformation energy-absorbing anchor rod and anchor rod device Download PDFInfo
- Publication number
- CN114542142A CN114542142A CN202210025058.6A CN202210025058A CN114542142A CN 114542142 A CN114542142 A CN 114542142A CN 202210025058 A CN202210025058 A CN 202210025058A CN 114542142 A CN114542142 A CN 114542142A
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- China
- Prior art keywords
- anchor rod
- sleeve
- closing
- sleeve pipe
- nut
- 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
- 239000011435 rock Substances 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 210000001503 joint Anatomy 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 16
- 230000006835 compression Effects 0.000 abstract description 13
- 238000007906 compression Methods 0.000 abstract description 13
- 238000004880 explosion Methods 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 description 12
- 238000004873 anchoring Methods 0.000 description 7
- 230000008093 supporting effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000005476 size effect Effects 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
-
- 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
- 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
- E21D21/008—Anchoring or tensioning means
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 self-locking large-deformation energy-absorbing anchor rod and an anchor rod device, wherein the anchor rod comprises an anchor rod body, a closing-in sleeve and an arc self-locking buckle; the binding off sleeve pipe cover is on the stock body of rod tail section, and the binding off of binding off sleeve pipe front end stops in the anterior protruding position of compression-shear section, and the binding off sleeve pipe wall that docks with the compression-shear section is opened along circumference and axial array has alternate sleeve pipe preformed hole, and arc auto-lock buckle inserts in the sleeve pipe preformed hole forward sloping. The anchor rod device comprises a nut, a steel plate tray and the anchor rod, wherein the steel plate tray tightly attached to the surrounding rock wall and the nut are assembled at the tail of the closing-up sleeve, the nut is in threaded fit with the outer tube of the closing-up sleeve, and the nut presses the steel plate tray. The invention solves the problems that the adhesive force and the friction force between the anchor rod and the grouting body disappear or are greatly reduced and the problem of effective support when the anchor rod alternately acts on the tensile stress wave and the compression stress wave under the action of the explosion stress wave.
Description
Technical Field
The invention belongs to a protective facility of civil engineering, and particularly relates to an anchor rod and an anchor rod device.
Background
In the industrial background that shallow resources are increasingly exhausted, resource exploitation inevitably turns to the deep part, and simultaneously the scale and the depth of underground engineering in industries such as nuclear industry, national defense industry, traffic, water conservancy and the like are increased at a high speed, in recent years, in the process of deep resource exploitation and deep underground engineering construction, major safety production accidents caused by engineering disasters such as large extrusion deformation, rock burst, gas explosion, mine water inrush and the like frequently occur, and huge life and property losses are caused. Because deep mining is in a complex mechanical environment of three-high one disturbance, the surrounding rock can generate the characteristic of large deformation under the action of deep high ground stress, so that the problem of controlling the stability of the surrounding rock of the soft rock roadway becomes one of the main problems which puzzle the safety of deep rock engineering. The anchor bolt support is the most widely applied support scheme, but the traditional anchor bolt has low elongation rate, cannot adapt to the large deformation of the surrounding rock of the deep roadway and cannot normally work under the condition that the surrounding rock generates large deformation, so that the failure of the anchor bolt support is caused to induce engineering accidents. When the surrounding rock is greatly deformed, the deformation energy of the surrounding rock in the roadway exceeds the range which can be borne by the anchor rod due to the large initial deformation energy, so that the cohesive force and the friction force between the anchor rod and the grouting body disappear or are greatly reduced, and finally the failure of supporting structures such as the anchor rod is caused.
In addition, under the action of impact loads such as explosion and blasting, the alternate action of tensile stress waves and compression stress waves exists in the surrounding rock, and the traditional anchor rod cannot provide effective support aiming at the alternate action of the tensile stress waves and the compression stress waves, so that engineering accidents such as roof collapse and collapse of a roadway and even rock burst are caused.
Chinese patent document CN208267886U discloses an adaptive energy release anchor rod, including T type stock, compression shear ring and sleeve, the sleeve bottom is fixed with the solder cake, is equipped with the compression shear ring in the sleeve, and the stock body of rod passes the compression shear ring centre bore and stretches out the sleeve from the solder cake, and the round platform face of stock front end is pressed on the top ring piece of compression shear ring, and the stock afterbody that stretches out the sleeve is equipped with baffle and the nut of hugging closely the country rock wall, and the nut is thread fit with the stock, and the baffle is pushed down to the nut. This patent increases the elongation, effectively releasing the energy generated by the deformation of the surrounding rock, but it also has 2 disadvantages: 1. the loss of the adhesive force and the friction force between the anchor rod and the grouting body cannot be avoided or the great reduction of the adhesive force and the friction force can be avoided so as to adapt to the large deformation characteristic of the surrounding rock; 2. under the action of the explosive stress wave, an effective supporting force cannot be provided for the alternating action of the tensile stress wave and the compression stress wave.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to solve the technical problem of providing a self-locking large-deformation energy-absorbing anchor rod, which can provide constant supporting acting force for a project with large deformation characteristics, can realize the self-locking effect of the anchor rod, resists the alternate loading action of tensile stress waves and compression stress waves generated by explosive impact loads, and ensures the safety and reliability of anchor rod support. The invention also provides an anchor rod device using the self-locking large-deformation energy-absorbing anchor rod.
In order to solve the technical problem, the invention provides a self-locking large-deformation energy-absorbing anchor rod which comprises an anchor rod body, a closing-in sleeve and an arc self-locking buckle; the anchor rod body is equipped with the press-shear section of convex-concave fluctuation, and the binding off sleeve pipe cover is on anchor rod body tail section, and the binding off of binding off sleeve pipe front end stops in the anterior protruding position of press-shear section, and the binding off sleeve pipe wall that docks with the press-shear section is opened along circumference and axial array has alternate sleeve pipe preformed hole, and arc auto-lock buckle inclines forward and inserts in the sleeve pipe preformed hole, and the front end card of arc auto-lock buckle is kept outside sleeve pipe preformed hole between the concave joint of anchor rod press-shear section, tail end.
The invention provides an anchor rod device which comprises a nut, a steel plate tray and the anchor rod, wherein the steel plate tray is arranged on the nut; the steel plate tray and the nut which are tightly attached to the surrounding rock wall are assembled at the tail part of the closing-in sleeve, the nut is in threaded fit with the outer tube of the closing-in sleeve, and the nut presses the steel plate tray.
The arc-shaped self-locking buckle can penetrate out of the preformed hole of the sleeve to form a beard inverting structure. The acting force of the convex part of the closing-up shearing and pressing section of the closing-up sleeve provides stable supporting force for large deformation of the surrounding rock, and can adapt to the characteristic of large deformation of the surrounding rock of the deep rock body. When the convex part of the continuous shearing and pressing section of the closing-up sleeve is displaced towards the free surface of the surrounding rock, the arc-shaped self-locking buckle can be extruded from the preformed hole of the sleeve under the action of the closing-up sleeve, so that the arc-shaped self-locking buckle is embedded into the surrounding rock, the anchoring characteristic of the anchor rod and the surrounding rock is firmer, and the self-locking effect of anchoring the anchor rod is realized. Along with the continuous increase of the displacement of the closing-up sleeve, more arc self-locking buckles can be gradually embedded into surrounding rock, so that the anchoring characteristic of the anchor rod is weakened along with the increase of deformation. Under the action of explosive impact load, usually, the alternating action of tensile stress waves and compression stress waves is generated, and the anchor rod provided by the invention not only can enhance the tensile property, but also can provide the compression resistance under the action of the arc-shaped self-locking buckle.
According to the invention, the high-efficiency anchor rod device capable of adapting to the large deformation and explosion impact load of the surrounding rock is provided by the interaction of the closing-up sleeve and the bulge part of the compression-shear section and the self-locking effect generated by embedding the arc-shaped self-locking buckle into the surrounding rock, and a good supporting effect can be achieved.
Due to the adoption of the technical scheme, the invention has the following advantages: the anchor rod can adapt to the large deformation that the country rock produced, can play effectual buffering and treatment effect to sudden disasters such as tunnel rock burst, colliery rock burst to the anchor rod has the self-locking effect, makes anchor force more firm between anchor rod and the country rock, has the advantage of resisting explosion impact load.
Drawings
The drawings of the invention are illustrated as follows:
FIG. 1 is a schematic view of the anchor assembly of the present invention;
fig. 2 is a schematic view of the appearance of the arc-shaped self-locking buckle.
In the figure: 1. closing the sleeve; 2. a nut; 3. a steel plate tray; 4. a casing preformed hole is reserved; 5. an arc self-locking buckle; 6. pressing and shearing sections; 7. an anchor rod body.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
for the sake of clarity of the description of the invention, the present patent application uses the terms "front" and "rear" to distinguish the installation mode according to fig. 1, the bolt extending direction is regarded as "front", the part close to the grouting opening is regarded as "rear", and the change of the orientation name is not regarded as the limitation of the patent protection scope.
As shown in fig. 1, the self-locking large deformation energy-absorbing anchor rod of the invention comprises a closing-in sleeve 1, an anchor rod body 7 and an arc self-locking buckle 5; the anchor rod body 7 is provided with a convex-concave fluctuating compression-shear section 6, the closing-up sleeve 1 is sleeved on the tail section of the anchor rod body 7, the closing-up at the front end of the closing-up sleeve 1 is clamped at the front protruding position of the compression-shear section 6, and alternate sleeve preformed holes 4 are formed in the tube wall of the closing-up sleeve 1 butted with the compression-shear section 6 in an array manner along the circumferential direction and the axial direction; as shown in figure 2, the arc-shaped self-locking buckle 5 is inserted into the casing preformed hole 4 in a forward inclining mode, the front end of the arc-shaped self-locking buckle 5 is clamped between concave gaps of the anchor rod pressing and shearing section 6, and the tail end of the arc-shaped self-locking buckle is left outside the casing preformed hole 4.
The diameter of the closing-in inner diameter of the front end of the closing-in sleeve 1 is 0.5mm larger than that of the anchor rod body 7, the maximum outer diameter of the pressing-shearing section 6 is 2.5-4.5 mm larger than that of the closing-in inner diameter of the closing-in sleeve 1, and the diameter of the closing-in sleeve 1 is 2-4 mm larger than that of the pressing-shearing section 6.
When the anchor rod is assembled, the anchor rod body 7 penetrates through the closing-up sleeve 1, the closing-up at the front end of the closing-up sleeve 1 is clamped at the protruding part at the front part of the compression-shear section 6, the arc-shaped self-locking buckle 5 is inserted into the closing-up sleeve along the preformed hole, and then the whole anchor rod is installed into the drill hole. The arc self-locking buckle 5 forms a reversed beard structure on the outer wall of the closing-up sleeve 1.
As shown in figure 1, the anchor rod device comprises a nut 2, a steel plate tray 3 and the anchor rod, wherein the steel plate tray 3 and the nut 2 which are tightly attached to a surrounding rock wall are assembled at the tail part of a closing-in sleeve 1, the nut 2 is in threaded fit with an outer tube of the closing-in sleeve 1, and the nut 2 presses the steel plate tray 3.
When the anchor rod device is installed, the front section of the anchor rod body 7 is in grouting pouring contact with surrounding rock to serve as an anchoring section, the section of the closing-in sleeve 1 is not in grouting pouring, the closing-in sleeve moves along with the deformation of the surrounding rock, and the nut 2 and the steel plate tray 3 lock the tail end of the closing-in sleeve 1 and the free face of the surrounding rock, so that the anchor rod integrally plays a role in supporting the surrounding rock.
The working principle of the invention is as follows:
when the surrounding rock is greatly deformed, the closing-up sleeve 1, the nut 2 and the steel plate tray 3 move along with the movement of the free face of the surrounding rock, the protruding part of the pressure shearing section 6 (namely the part of the pressure shearing section 6 with the diameter larger than the closing-up inner diameter of the closing-up sleeve 1) can be continuously sheared in the moving process of the closing-up sleeve 1, and the force generated by the protruding part of the closing-up sleeve 1 shearing the pressure shearing section 6 provides counter force for the anchor rod support. When the anchor rod is manufactured, different support counter forces are obtained by changing the difference between the diameter of the press-shearing section 6 and the closed-up inner diameter of the closed-up sleeve 1, and the maximum outer diameter of the press-shearing section 6 is 2.5-4.5 mm larger than the closed-up inner diameter of the closed-up sleeve 1. In the process of large deformation of the surrounding rock, the anchor rod can provide constant supporting force and gradually absorb energy released by deformation of the surrounding rock, so that the stability of the surrounding rock is maintained.
Further, the length of the compression-shear section 6 can be changed, so that the anchor rod can adapt to the size and continuous effect of large deformation of different surrounding rocks.
Meanwhile, when the surrounding rock is greatly deformed, the steel sheet at the tail part of the arc self-locking buckle 5 can be extruded out of the sleeve preformed hole 4 under the action of the closing-up sleeve 1, so that the arc self-locking buckle 5 is embedded into the surrounding rock, which is equivalent to a reversed beard structure, the anchoring characteristic of the anchor rod and the surrounding rock is firmer, and the self-locking function of anchoring the anchor rod is realized. Along with the continuous increase of the displacement of the closing-up sleeve 1, more arc-shaped self-locking buckles 5 can be gradually embedded into surrounding rock, so that the anchoring characteristic of the anchor rod is enhanced along with the increase of the deformation; the problem that the adhesive force and the friction force between the conventional anchor rod and the grouting body disappear or are greatly reduced is solved.
Under the action of explosive impact load, usually, the alternating action of tensile stress waves and compression stress waves is generated, and as the arc-shaped self-locking buckle 5 is embedded into the surrounding rock, the anchor rod provided by the invention not only can enhance the tensile property, but also can provide the compression resistance under the action of the arc-shaped self-locking buckle 5.
Claims (2)
1. A self-locking large-deformation energy-absorbing anchor rod comprises an anchor rod body (7), and is characterized by further comprising a closing-up sleeve (1) and an arc-shaped self-locking buckle (5); the anchor rod body (7) is equipped with the press-shear section (6) that the convex-concave fluctuates, binding off sleeve pipe (1) cover is on anchor rod body (7) tail section, the binding off of binding off sleeve pipe (1) front end is blocked in the anterior protruding position of press-shear section (6), it has alternate sleeve pipe preformed hole (4) to open with binding off sleeve pipe (1) pipe wall that press-shear section (6) butt joint along circumference and axial array, arc auto-lock buckle (5) incline forward and insert in sleeve pipe preformed hole (4), the front end card of arc auto-lock buckle (4) is between the recess seam of anchor rod press-shear section (6), the tail end is stayed outside sleeve pipe preformed hole (4).
2. The utility model provides a stock device, includes nut (2) and steel sheet tray (3), characterized by: the anchor rod of claim 1, wherein a steel plate tray (3) tightly attached to the surrounding rock wall and a nut (2) are assembled at the tail of the closing-in sleeve (1), the nut (2) is in threaded fit with the outer tube of the closing-in sleeve 1, and the nut (2) presses the steel plate tray (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025058.6A CN114542142A (en) | 2022-01-11 | 2022-01-11 | Self-locking large-deformation energy-absorbing anchor rod and anchor rod device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025058.6A CN114542142A (en) | 2022-01-11 | 2022-01-11 | Self-locking large-deformation energy-absorbing anchor rod and anchor rod device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114542142A true CN114542142A (en) | 2022-05-27 |
Family
ID=81670637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210025058.6A Pending CN114542142A (en) | 2022-01-11 | 2022-01-11 | Self-locking large-deformation energy-absorbing anchor rod and anchor rod device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114542142A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115928703A (en) * | 2023-02-14 | 2023-04-07 | 四川省建筑科学研究院有限公司 | Partial freezing transformation method for near-water structural slab |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359386A (en) * | 2011-10-28 | 2012-02-22 | 湖南科技大学 | Shearing sleeve type yielding bolt |
| CN205036397U (en) * | 2015-10-15 | 2016-02-17 | 山东科技大学 | But recycle cavity cling compound slip casting stock |
| CN207080241U (en) * | 2017-09-01 | 2018-03-09 | 河南国龙矿业建设有限公司 | A kind of mine laneway tool for grouting in loose |
| CN207261027U (en) * | 2017-09-18 | 2018-04-20 | 西安科技大学 | A kind of Novel threaded anchor pole hangnail device |
| CN108360512A (en) * | 2018-02-14 | 2018-08-03 | 重庆恩光科技有限公司 | The anchor of high tensile |
| CN207728382U (en) * | 2018-01-03 | 2018-08-14 | 山东科技大学 | A kind of slidably hangnail self-locking shape anchor pole |
| CN108442955A (en) * | 2018-05-14 | 2018-08-24 | 重庆大学 | A kind of adaptive friction formula anchor pole |
| CN109162743A (en) * | 2018-09-26 | 2019-01-08 | 西南交通大学 | A kind of quasi- constant resistance and large deformation anchor cable of friction-shearing combined type |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN211081923U (en) * | 2019-08-09 | 2020-07-24 | 安徽理工大学 | Novel anchor rod with movable barbs |
| CN215213548U (en) * | 2021-08-02 | 2021-12-17 | 四川志德公路工程有限责任公司 | Anchor rod protection structure for tunnel or culvert construction |
-
2022
- 2022-01-11 CN CN202210025058.6A patent/CN114542142A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359386A (en) * | 2011-10-28 | 2012-02-22 | 湖南科技大学 | Shearing sleeve type yielding bolt |
| CN205036397U (en) * | 2015-10-15 | 2016-02-17 | 山东科技大学 | But recycle cavity cling compound slip casting stock |
| CN207080241U (en) * | 2017-09-01 | 2018-03-09 | 河南国龙矿业建设有限公司 | A kind of mine laneway tool for grouting in loose |
| CN207261027U (en) * | 2017-09-18 | 2018-04-20 | 西安科技大学 | A kind of Novel threaded anchor pole hangnail device |
| CN207728382U (en) * | 2018-01-03 | 2018-08-14 | 山东科技大学 | A kind of slidably hangnail self-locking shape anchor pole |
| CN108360512A (en) * | 2018-02-14 | 2018-08-03 | 重庆恩光科技有限公司 | The anchor of high tensile |
| CN108442955A (en) * | 2018-05-14 | 2018-08-24 | 重庆大学 | A kind of adaptive friction formula anchor pole |
| CN109162743A (en) * | 2018-09-26 | 2019-01-08 | 西南交通大学 | A kind of quasi- constant resistance and large deformation anchor cable of friction-shearing combined type |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN211081923U (en) * | 2019-08-09 | 2020-07-24 | 安徽理工大学 | Novel anchor rod with movable barbs |
| CN215213548U (en) * | 2021-08-02 | 2021-12-17 | 四川志德公路工程有限责任公司 | Anchor rod protection structure for tunnel or culvert construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115928703A (en) * | 2023-02-14 | 2023-04-07 | 四川省建筑科学研究院有限公司 | Partial freezing transformation method for near-water structural slab |
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| PB01 | Publication | ||
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Application publication date: 20220527 |
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