CN201943725U - Friction sleeve type large-deformation anchor rod - Google Patents
Friction sleeve type large-deformation anchor rod Download PDFInfo
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- CN201943725U CN201943725U CN201120066745XU CN201120066745U CN201943725U CN 201943725 U CN201943725 U CN 201943725U CN 201120066745X U CN201120066745X U CN 201120066745XU CN 201120066745 U CN201120066745 U CN 201120066745U CN 201943725 U CN201943725 U CN 201943725U
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- anchor rod
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Abstract
The utility model belongs to the anchoring field of geotechnical engineering and relates to a support structure of large-deformation geotechnical body, in particular to an anchor rod. A friction sleeve type large-deformation anchor rod comprises an outer nut (2), a base plate (3), a cylindrical friction body (5), a friction sleeve (6) and a rod body (8), wherein friction teeth (62) are arranged on the inner wall of the friction sleeve (6), and the cylindrical friction body (5) is arranged on the rod body (8); the friction teeth (62) is in a triangular or trapezoidal shape along the axial section of the friction sleeve (6), and the length of the cylindrical friction body (5) is greater than the longitudinal distances of the friction teeth (62) arranged along the friction sleeve (6); or the friction teeth (62) are one continuously-closed ring body, and the inner diameter of the section of the friction teeth (62) is less than the outer diameter of the cylindrical friction body (5). The friction sleeve type large-deformation anchor rod has the technical effects that the anchor rod can automatically adapt to large deformation of surrounding rock to extend automatically, and simultaneously can absorb deformation energy of the surrounding rock during the deformation, thereby ensuring the support effect of the surrounding rock.
Description
Technical field
The utility model belongs to geotechnical engineering anchoring field, relates to a kind of supporting and protection structure of large deformation geotechnical body, relates in particular to a kind of anchor pole.
Background technology
Carry out roadway construction in weak surrounding rock, the country rock of facing often is to the large deformation of tunnel convergence, in this case, if the initial stage is promptly adopted the very big supporting of rigidity, supporting and protection structure can very fast damage under the pressure from surrounding rock effect, has both wasted manpower and materials, again the non-support effect.People such as Liu Quansheng point out in (2010 the 10th phases of rock mechanics) at literary composition " colliery deep tunnel break non-linear large deformation of country rock and supporting countermeasure ": the organizational styucture of deep rock mass, basic act feature and engineering response are compared with the superficial part rock mass essence variation have all been taken place, be embodied as the country rock that shows as hard and steady at superficial part, generally all show significant soft rock feature in the deep, the various supporting and protection structure of employing and support pattern also will adapt to the large deformation of this weak surrounding rock.People such as Lu Chunchang are at literary composition " technical research and the application of hydraulic expansion type pipe anchor pole in weak, large deformation country rock roadway opening " in (2009 the 6th phases of mining safety and environmental protection), a kind of hydraulic expansion type pipe anchor pole is proposed, in order to the roadway with large deformation country rock is carried out supporting, supporting effect is obvious.People such as Li You proposed with a kind of band large deformation anchor rod that cracks the large deformation soft rock to be carried out supporting in literary composition " a kind of novel extending anchor pole that is applicable to the large deformation supporting " (2007 the 2nd phases of Central-South highway engineering), had improved supporting effect.Above-mentioned document shows, to the supporting of large deformation weak surrounding rock, should adopt flexible support, allows surrouding rock deformation earlier under controlled condition, makes country rock release portion deformation energy, brings into play the self-supporting ability of country rock simultaneously.
For solving the supporting problem of large deformation soft rock, just require to produce the large deformation of bigger elongation strain, so some large deformation anchor rods occurred with suitable for surrounding rock as the anchor pole of preliminary bracing.As being to disclose a kind of constant resistance and large deformation anchor rod in 201010196197.2 the application in the patent No., but the perfect thread connected mode of its constant-resistance device and the body of rod is unfavorable for effectively realizing the dual purpose of constant-resistance and large deformation; A kind of snakelike extending anchor pole is disclosed in the patent No. is 88204483.4 application, but its snakelike section in deformation process axially pulling force increase the further distortion of restriction country rock in proportion.In a word, existing traditional anchor pole elongation per unit length is low, can not satisfy the requirement of large deformation country rock; Existing large deformation anchor rod constant-resistance effect is not satisfactory, is unfavorable for applying in actual engineering.
The utility model content
The purpose of this utility model is to provide a kind of friction sleeve cartridge type large deformation anchor rod, and the elongation per unit length that overcomes existing traditional anchor pole existence is low, the problem of supporting effect difference, overcomes the existing not satisfactory problem of large deformation anchor rod constant-resistance effect simultaneously.
For achieving the above object, the technical solution of the utility model is:
A kind of friction sleeve cartridge type large deformation anchor rod, comprise outer nut (2), backing plate (3), cylindricality friction piece (5), friction sleeve (6), the body of rod (8), it is characterized in that: the inwall of described friction sleeve (6) is provided with friction teeth (62), and the described body of rod (8) is provided with cylindricality friction piece (5).
Technique scheme can further be improved to: described outer nut (2) and backing plate (3) are sleeved on the afterbody of friction sleeve (6) successively.
Technique scheme can further be improved to: described outer nut (2) and backing plate (3) are sleeved on the afterbody of the body of rod (8) successively.
Technique scheme can further be improved to: described friction teeth (62) is pressed the section interlaced arrangement, every section is provided with quantity more than or equal to 2, the section internal diameter that the crown of friction teeth (62) forms is less than the external diameter of described cylindricality friction piece (5), friction teeth (62) is triangular in shape or trapezoidal along the axial section of friction sleeve (6), the longitudinal pitch that cylindricality friction piece (5) length is arranged along friction sleeve (6) greater than friction teeth (62).
Technique scheme can further be improved to: described friction teeth (62) is a continuous closed ring body, and the section internal diameter of friction teeth (62) is less than the external diameter of described cylindricality friction piece (5).
Technique scheme can further be improved to: an end of described friction sleeve (6) is provided with tail seal plug (1), and the other end is provided with head seal plug (7).
Technique scheme can further be improved to: described backing plate (3) is dish or flat shape.
Technique scheme can further be improved to: also comprise a stopper (63), described stopper (63) is an annular, is arranged in the inner surface of described friction sleeve (6), and the internal diameter of described stopper (63) is slightly larger than the diameter of the body of rod (8).
Technique scheme can further be improved to: described cylindricality friction piece (5) is arranged on the afterbody of the body of rod (8), is threaded with the described body of rod (8) afterbody by described inner nut (4), or directly processes at the described body of rod (8) afterbody.
Technique scheme can further be improved to: described cylindricality friction piece (5) is arranged on the head of the body of rod (8), is threaded with the described body of rod (8) head by described inner nut (4), or directly processes at the described body of rod (8) head.
The beneficial effects of the utility model are: the large deformation of suitable for surrounding rock and automatically extending automatically simultaneously can absorb the deformation energy of country rock, thereby guarantee its supporting effect in deformation process.
Description of drawings
Fig. 1 is a structural representation one of the present utility model.
Fig. 2 is a structural representation two of the present utility model.
Fig. 3 is the a-a sectional drawing (in figure friction teeth quantity be 4) of friction teeth when discontinuous.
Fig. 4 is the b-b sectional drawing (in figure friction teeth quantity be 4) of friction teeth when discontinuous.
A-a sectional drawing when Fig. 5 is continuous ring body for friction teeth.
Fig. 6 is the plan view and the sectional drawing of dish-shaped backing plate.
Fig. 7 is the plan view and the sectional drawing of plate shaped backing plate.
Fig. 8 is the structural representation of the utility model preferred embodiment.
Fig. 9 is the structural representation of the utility model preferred embodiment.
Among the figure: 1-tail seal plug 2-outer nut 3-backing plate 4-inner nut
The 5-cylindricality friction piece 6-friction sleeve 7-head seal plug 8-body of rod
31-backing plate preformed hole 61-friction sleeve tailing screw flight 62-friction teeth 63-stopper
81-body of rod tailing screw flight
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, the utility model comprises outer nut 2, inner nut 4, backing plate 3, cylindricality friction piece 5, friction sleeve 6, the body of rod 8 etc.Friction sleeve 6 is set in the afterbody of the body of rod 8, backing plate 3 and outer nut 2 are sleeved on the afterbody of friction sleeve 6 successively, wherein the pars intermedia of backing plate 3 sets up a preformed hole 31 separately, pass for friction sleeve 6, outer nut 2 is connected in friction sleeve 6 by screw thread 61, the length range of friction sleeve 6 is 10cm ~ 150cm, can determine according to the permission displacement size of country rock.
In order to realize large deformation performance of the present utility model, the inner surface of friction sleeve 6 is provided with friction teeth 62, friction teeth 62 is triangular in shape or trapezoidal along the axial section of friction sleeve 6, inner edge is curved, press the section interlaced arrangement, every section is provided with quantity generally more than or equal to 2 (being 4 in accompanying drawing 3, the accompanying drawing 4), axial spacing along friction sleeve 6 is 5 ~ 30cm, friction teeth also can directly be set to a closed ring body (accompanying drawing 5), and the section internal diameter that the crown of friction teeth 62 forms is less than the external diameter of cylindricality friction piece 5.
The external diameter of cylindricality friction piece 5 according to stressing conditions of the present utility model, can change its internal diameter greater than the section internal diameter of the crown formation of friction teeth 62 by the thickness of adjusting friction teeth 62.When requiring the anchor pole bearing capacity big, reduce the section internal diameter of the crown formation of friction teeth 62; When requiring the anchor pole bearing capacity hour, increase the section internal diameter that the crown of friction teeth 62 forms; Adjustment by friction teeth 62 internal diameters adapts to different pressures from surrounding rock.
The axial tension that is subjected to when the utility model is during less than the barrier force of 62 pairs of cylindricality friction pieces 5 of friction teeth, and friction sleeve 6 and cylindricality friction piece 5, the body of rod 8 are in relative static conditions; The axial tension that is subjected to when the utility model is during greater than the barrier force of 62 pairs of cylindricality friction pieces 5 of friction teeth, friction sleeve 6 produces radial deformation or friction teeth 62 shear failure or the two and has concurrently, between friction sleeve 6 and cylindricality friction piece 5, the body of rod 8 relative displacement will take place.Along with the increase of displacement, the distortion of country rock increases gradually, and pressure from surrounding rock can reduce usually gradually, and when axial tension reduces, friction sleeve 6 and cylindricality friction piece 5 will no longer relative displacement take place between the body of rod 8 and remain static.When cylindricality friction piece 5 is about to slip over a friction teeth 62 sections, will organize friction teeth 62 with next and contact, thus the continuity of realization barrier force.
In order to limit the maximum distortion of country rock, make its length that is no more than friction sleeve 6, at the inner surface of friction sleeve 6 heads stopper 63 is set, stopper 63 is rectangular along friction sleeves 6 axial sections, its internal diameter is slightly larger than the diameter of the body of rod 8, thereby guarantees that cylindricality friction piece 5 does not break away from friction sleeve 6.When cylindricality friction piece 5 contacts with stopper 63, the utility model will no longer extend, and pulling capacity rises until the strength limit of the body of rod.
For preventing that geotechnical body and moisture engaging friction sleeve 6 inside from causing internal construction generation corrosion, destruction, at the two ends of friction sleeve 6 tail seal plug 1 and head seal plug 7 are set respectively, thereby guarantee that friction sleeve 6 inside are in air-tight state.
Figure 2 shows that structural representation two of the present utility model, a little difference is only arranged with structural representation one.Cylindricality friction piece 5 is directly processed the afterbody at the body of rod 8, is equivalent to affixedly, and do not need inner nut 4 and screw thread 81 this moment.
Figure 3 shows that the a-a sectional drawing (friction teeth quantity is 4 among the figure) when friction teeth is discontinuous, reflected the arrangement form of friction teeth 62, evenly arrange along friction sleeve 6 inner surface hoops.
Figure 4 shows that the b-b sectional drawing (friction teeth quantity is 4 among the figure) when friction teeth is discontinuous, reflected the arrangement form of friction teeth 62, arrange evenly that along friction sleeve 6 inner surface hoops Fig. 3 and Fig. 4 show friction teeth 62 interlaced arrangement of adjacent two sections.
A-a sectional drawing when friction teeth shown in Figure 5 is continuous ring body has reflected that friction teeth 62 is showing as closed hoop on vertical body of rod section.
Figure 6 shows that the plan view and the sectional drawing of dish-shaped backing plate, the purpose of backing plate 3 is that the anchored force that applies effectively is distributed on the geotechnical body of periphery, the preformed hole 31 on the backing plate 3, the passing of the sleeve 6 that is beneficial to rub.
Figure 7 shows that the plan view and the sectional drawing of plate shaped backing plate, the purpose of backing plate 3 is that the anchored force that applies effectively is distributed on the geotechnical body of periphery, the preformed hole 31 on the backing plate 3, the passing of the sleeve 6 that is beneficial to rub.
Fig. 8, Figure 9 shows that the structural representation of other two kinds of preferred embodiments of the present utility model.That is: outer nut 2 and backing plate 3 are sleeved on the afterbody of the body of rod 8 successively, and cylindricality friction piece 5 is directly processed the head at the body of rod 8, is equivalent to affixed; And cylindricality friction piece 5 can be sleeved on the body of rod 8 heads by inner nut 4, and this moment, the body of rod 8 head external surfaces were provided with the screw thread 81 with inner nut 4 couplings.
The utility model had both been controlled surrouding rock deformation when interacting with country rock, allow surrouding rock deformation again, distortion along with country rock, the utility model stretches automatically and provides lasting supporting power to country rock, thereby realizes the stable of prop, has eliminated potential safety hazards such as roof fall, landslide, rock burst, landslide.
The utility model provides lasting supporting power to the large deformation country rock, applicable to departments such as building, water conservancy, mining industry, highway, railways by the interaction of the friction sleeve and the body of rod.The utility model is simple in structure, and is easy to make, cheap.
Claims (10)
1. friction sleeve cartridge type large deformation anchor rod, comprise outer nut (2), backing plate (3), cylindricality friction piece (5), friction sleeve (6), the body of rod (8), it is characterized in that: the inwall of described friction sleeve (6) is provided with friction teeth (62), and the described body of rod (8) is provided with cylindricality friction piece (5).
2. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 1 is characterized in that: described outer nut (2) and backing plate (3) are sleeved on the afterbody of friction sleeve (6) successively.
3. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 1 is characterized in that: described outer nut (2) and backing plate (3) are sleeved on the afterbody of the body of rod (8) successively.
4. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 1, it is characterized in that: described friction teeth (62) is pressed the section interlaced arrangement, every section is provided with quantity more than or equal to 2, the section internal diameter that the crown of friction teeth (62) forms is less than the external diameter of described cylindricality friction piece (5), friction teeth (62) is triangular in shape or trapezoidal along the axial section of friction sleeve (6), the longitudinal pitch that cylindricality friction piece (5) length is arranged along friction sleeve (6) greater than friction teeth (62).
5. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 1 is characterized in that: described friction teeth (62) is a continuous closed ring body, and the section internal diameter of friction teeth (62) is less than the external diameter of described cylindricality friction piece (5).
6. friction sleeve cartridge type large deformation anchor rod according to claim 1 is characterized in that: an end of described friction sleeve (6) is provided with tail seal plug (1), and the other end is provided with head seal plug (7).
7. friction sleeve cartridge type large deformation anchor rod according to claim 1 is characterized in that: described backing plate (3) is dish or flat shape.
8. friction sleeve cartridge type large deformation anchor rod according to claim 1, it is characterized in that: also comprise a stopper (63), described stopper (63) is an annular, is arranged in the inner surface of described friction sleeve (6), and the internal diameter of described stopper (63) is slightly larger than the diameter of the body of rod (8).
9. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 2, it is characterized in that: described cylindricality friction piece (5) is arranged on the afterbody of the body of rod (8), be threaded with the described body of rod (8) afterbody by described inner nut (4), or directly process at the described body of rod (8) afterbody.
10. a kind of friction sleeve cartridge type large deformation anchor rod according to claim 3, it is characterized in that: described cylindricality friction piece (5) is arranged on the head of the body of rod (8), be threaded with the described body of rod (8) head by described inner nut (4), or directly process at the described body of rod (8) head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120066745XU CN201943725U (en) | 2011-03-15 | 2011-03-15 | Friction sleeve type large-deformation anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120066745XU CN201943725U (en) | 2011-03-15 | 2011-03-15 | Friction sleeve type large-deformation anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201943725U true CN201943725U (en) | 2011-08-24 |
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ID=44471074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120066745XU Expired - Fee Related CN201943725U (en) | 2011-03-15 | 2011-03-15 | Friction sleeve type large-deformation anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201943725U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094662A (en) * | 2011-03-15 | 2011-06-15 | 北京科技大学 | Friction sleeve type large deformation anchor rod |
| CN103603685A (en) * | 2013-12-10 | 2014-02-26 | 辽宁工程技术大学 | Stretchable variable-resistance energy absorption anchor rod |
| CN105298525A (en) * | 2015-11-19 | 2016-02-03 | 辽宁工程技术大学 | Anti-shock ground pressure lengthening anchor rod |
| CN108590721A (en) * | 2018-05-14 | 2018-09-28 | 重庆大学 | A kind of adaptively release can anchor pole |
| CN108756974A (en) * | 2018-04-25 | 2018-11-06 | 中国地质大学（武汉） | A kind of novel anti-shearing large deformation anchor rod |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN114542144A (en) * | 2022-02-22 | 2022-05-27 | 中国矿业大学 | Broken surrounding rock enlarged type end anchoring multi-stage yielding constant-resistance large-deformation anchor rod and method |
| WO2022252243A1 (en) * | 2021-06-02 | 2022-12-08 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
-
2011
- 2011-03-15 CN CN201120066745XU patent/CN201943725U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094662A (en) * | 2011-03-15 | 2011-06-15 | 北京科技大学 | Friction sleeve type large deformation anchor rod |
| CN102094662B (en) * | 2011-03-15 | 2013-04-03 | 北京科技大学 | Friction sleeve type large deformation anchor rod |
| CN103603685A (en) * | 2013-12-10 | 2014-02-26 | 辽宁工程技术大学 | Stretchable variable-resistance energy absorption anchor rod |
| CN103603685B (en) * | 2013-12-10 | 2017-01-11 | 辽宁工程技术大学 | Stretchable variable-resistance energy absorption anchor rod |
| CN105298525A (en) * | 2015-11-19 | 2016-02-03 | 辽宁工程技术大学 | Anti-shock ground pressure lengthening anchor rod |
| CN108756974A (en) * | 2018-04-25 | 2018-11-06 | 中国地质大学（武汉） | A kind of novel anti-shearing large deformation anchor rod |
| CN108590721A (en) * | 2018-05-14 | 2018-09-28 | 重庆大学 | A kind of adaptively release can anchor pole |
| CN109339840A (en) * | 2018-11-13 | 2019-02-15 | 重庆大学 | A kind of antitorque large deformation anchor rod |
| CN109339840B (en) * | 2018-11-13 | 2024-03-05 | 重庆大学 | Anti-torsion large-deformation anchor rod |
| WO2022252243A1 (en) * | 2021-06-02 | 2022-12-08 | 中国矿业大学 | Self-adaptive anti-shearing large-deformation anchor rod |
| CN114542144A (en) * | 2022-02-22 | 2022-05-27 | 中国矿业大学 | Broken surrounding rock enlarged type end anchoring multi-stage yielding constant-resistance large-deformation anchor rod and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20120315 |