CN103758551B - Multistage anchoring type resin anchor and anchoring process thereof - Google Patents
Multistage anchoring type resin anchor and anchoring process thereof Download PDFInfo
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- CN103758551B CN103758551B CN201410030080.5A CN201410030080A CN103758551B CN 103758551 B CN103758551 B CN 103758551B CN 201410030080 A CN201410030080 A CN 201410030080A CN 103758551 B CN103758551 B CN 103758551B
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- anchoring
- section
- free segment
- anchor
- bar body
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Abstract
The invention discloses a kind of multistage anchoring type resin anchor and anchoring process thereof, it includes anchor bar body and aperture preloader, anchor pole is interval with an anchoring section, and remaining section is free segment；Described some anchoring section is to be machined with dentation cutting ring on the anchor bar body of this section, dentation cutting ring overcoat has double-component resin anchoring cartridge, double-component resin anchoring cartridge two ends are cased with spacer ring, thus start anchor bar body from aperture to be divided into the first free segment, anchoring section, the second free segment, second point anchoring section, the 3rd free segment, thirdly anchoring section successively at first, require that the first free segment is in the relaxation zone of country rock, thirdly anchoring section is in the elastic region of country rock, and remaining section is in the plastic zone of country rock.The length of some anchoring section of the present invention and the quantity of free segment and each section can adjust according to pressure from surrounding rock characteristic distributions, disperses load, it is to avoid occur in anchor pole end superpower stress to concentrate, prevents body of rod fracture or extracted by anchoring body.
Description
Technical field
The present invention relates to all kinds of rock mass engineering projects such as mine working, traffic tunnel, underground engineering, rock mass slope add
Gu anchor pole, be particularly suited for the reinforcing anchor pole of Soft Rock Engineering.
Background technology
Current anchor rod anchored mode is mainly end anchorage formula anchor pole or full length fastening formula anchor pole, and they are all
It is made up of anchor bar body, aperture preloader and Anchor Agent.The technology relevant with the present invention is end anchorage formula anchor pole.
End anchorage formula anchor pole is to be arranged with double-component resin anchoring agent bottom the hole of anchor bar body, and this anchor pole is called for short
" resin anchor "；This " resin anchor " anchoring kind form often forms area of stress concentration in anchored end,
Make anchored end surrounding rock body destroy, cause suspension roof support to lose efficacy, or due to anchor pole by country rock from surface to deeply
Portion's deformation forms cumulative formula transmission, causes anchor pole to be pulled off.
According to tunnel or tunnel wall rock deformation feature, country rock outside in can be divided into four districts: relaxation zone, plasticity
District, elastic region and initial stress area, the trend that the amount of displacement of country rock upwards presents in bolt shaft is, pine
Dynamic district is maximum next to that plastic zone, minimum are elastic regions.Current anchor rod anchored mode is not according to this
Displacement trend is designed, so anchor pole can be caused to break or the situation of supporting inefficacy.
Summary of the invention
In order to solve existing anchor rod anchored time cannot suitable for surrounding rock deformation displacement and be pulled off the technology of inefficacy and ask
Topic, the present invention proposes a kind of multistage anchoring type resin anchor, and the construction method of this anchor pole.This anchor pole can
According to the deformation characteristics of country rock, releasing by parts deforms, and the cumulative formula that can eliminate the deformation of anchor pole surrounding rock body passes
Pass, it is to avoid anchor point forms overstress concentration zones.
A kind of multistage anchoring type resin anchor, it includes anchor bar body and aperture preloader, it is characterised in that
Being interval with an anchoring section on anchor bar body, remaining section is free segment；Described some anchoring section is the anchor at this section
Being machined with dentation cutting ring on the body of rod, dentation cutting ring overcoat has double-component resin anchoring cartridge, double-component resin anchor
Gu powder stick two ends are cased with spacer ring；Thus start anchor bar body from aperture to be divided into successively the first free segment,
First anchoring section, the second free segment, second point anchoring section, the 3rd free segment, thirdly anchoring section, respectively
After the length of some anchoring section and free segment should ensure that anchor pole squeezes into boring, the anchor bar body of the first free segment is in and encloses
The relaxation zone of rock, thirdly the anchor bar body of anchoring section is in the elastic region of country rock, and the anchor bar body of remaining section is in
The plastic zone of country rock.
The anchoring process of above-mentioned multistage anchoring type resin anchor is:
The first step: hole on the roadway surrounding rock needing anchoring, drilling depth is equal to rock-bolt length；
Second step: push in boring by the anchor pole processed, is arranged on rig on anchor bar body appears, starts
Rig, anchor bar body advances and rotates, and breaks double-component resin anchoring cartridge by dentation cutting ring, is continuing rotation
Under Zhuaning, the double-component resin anchoring agent composition in double-component resin anchoring cartridge is stirred, solidification, make anchor
The body of rod is bonded together closely with country rock；
3rd step: after double-component resin anchoring agent is solidified to some strength, loads onto aperture preloader, passes through
The nut of pre-pressing structure applies pretightning force, make the first free segment just in relaxation zone, first anchoring section,
Second free segment, second point anchoring section, the 3rd free segment are in plastic zone, and thirdly anchoring section is in elasticity
District.
Above-mentioned spacer ring effect is to prevent Anchor Agent from flowing into free segment.
Operation principle and the good effect of the present invention be:
1, owing to the first free segment is just at relaxation zone, the first free segment and first anchoring section are pre-with aperture
It is collectively forming stabilization zone between tight device, the effect of this dependence aperture, stabilization zone preloader, the anchor bar body between being allowed to
Keeping isolation with country rock, so, country rock will not be wrapped up in and embrace anchor bar body synchronous shift, makes relaxation zone country rock become
Shape energy can freely dissipate, and eliminates the surrounding rock displacement transmission synergistic effect to anchor pole, prevents anchor pole from being drawn
Bad inefficacy.
2, first, second anchor pole section is provided entirely in plastic zone, forms a supporting region, this supporting region
Displacement Ratio proparea much smaller, can be according to the length of the requirement selected element anchoring section of supporting construction, to weakness
Rock mass even can section anchoring entirely.
3, stabilization zone and supporting region harmony deposit, interacts, forms monocoque structure.Stabilization zone is not only
Can be dissipated the deformation energy of confined area, and have supporting role to supporting region, improves the bearing capacity of supporting region.
Supporting region bears the rock deformation pressure that elastic region transmission comes, the deformation in restrained reinforcement district, keeps the entirety of stabilization zone
Stable.The harmony of twoth district is also saved as shape monocoque structure.
4, anchoring section and free segment quantity and length ratio can adjust according to pressure from surrounding rock characteristic distributions, dispersion
Load, it is to avoid occur in anchor pole end superpower stress to concentrate and make body of rod fracture or anchoring body is extracted.
Marginal data
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the A portion enlarged drawing of Fig. 1；
Fig. 3 is that the present invention anchors schematic diagram.
Marginal data, 1-anchor bar body, 2-aperture preloader, 2.1-nut, 2.3-compression spring, 2.3-holds in the palm
Dish, first anchoring section of 3.1-, 3.2-second point anchoring section, 3.3-thirdly anchoring section, 4.1-first is freely
Section, 4.2-the second free segment, 4.3-the 3rd free segment, 5-spacer ring, 6-double-component resin anchoring cartridge,
7-dentation cutting ring.
Detailed description of the invention
Multistage anchoring type resin anchor as shown in Figure 1 and Figure 2, it includes anchor bar body 1 and aperture preloader 2,
Aperture preloader 2 is made up of nut 2.1, compression spring 2.2 and pallet 2.3, is spaced and sets on anchor bar body 1
Having an anchoring section, remaining section is free segment；Described some anchoring section is to be machined with on the anchor bar body 1 of this section
Dentation cutting ring 7, is cased with double-component resin anchoring cartridge 6, double-component resin anchoring cartridge 6 outside dentation cutting ring 7
Two ends are cased with spacer ring 5；Thus start anchor bar body 1 from aperture in turn to be subdivided into the first free segment 4.1,
First anchoring section the 3.1, second free segment 4.2, second point anchoring section 3.2, the 3rd free segment 4.3,
3 anchoring sections, after the length of each point anchoring section and free segment should ensure that anchor pole squeezes into boring, the first free segment
The anchor bar body of 4.1 is in the relaxation zone of country rock, and thirdly the anchor bar body of anchoring section 3.3 is in the elastic region of country rock,
First anchoring section the 3.1, second free segment 4.2, the anchor of second point anchoring section the 3.2, the 3rd free segment 4.3
The body of rod is in the plastic zone of country rock.
The anchoring process of above-mentioned multistage anchoring type resin anchor is (see figure 3):
The first step: hole on the roadway surrounding rock needing anchoring, drilling depth is equal to rock-bolt length；
Second step: push in boring by the anchor pole processed, is arranged on rig on anchor bar body 1 appears, opens
Dynamic rig, anchor bar body 1 advances and rotates, and breaks double-component resin anchoring cartridge 6 by dentation cutting ring 7,
Under continuing to rotate, the double-component resin anchoring agent composition in powder stick is stirred, solidification, make anchor bar body 1 with
Country rock is bonded together closely；
3rd step: treat in double-component resin anchoring cartridge 6 double-component resin anchoring agent composition be solidified to one
After determining intensity, load onto aperture preloader 2, apply pretightning force by the nut 2.1 of preloader 2, make first certainly
Be in the relaxation zone of country rock by the anchor bar body of section 4.1, thirdly the anchor bar body of anchoring section 3.3 is in country rock
Elastic region, first anchoring section the 3.1, second free segment 4.2, second point anchoring section 3.2 and the 3rd free segment
The anchor bar body of 4.3 is in the plastic zone of country rock.
The effect of above-mentioned spacer ring 5 is to prevent Anchor Agent from flowing into free segment.
Claims (2)
1. a multistage anchoring type resin anchor, it includes anchor bar body and aperture preloader, it is characterised in that
Being interval with an anchoring section on anchor bar body, remaining section is free segment；Described some anchoring section is at this section
Being machined with dentation cutting ring on anchor bar body, dentation cutting ring overcoat has double-component resin anchoring cartridge, double-component resin
Anchoring cartridge two ends are cased with spacer ring；Thus start anchor bar body from aperture to be divided into successively the first free segment,
First anchoring section, the second free segment, second point anchoring section, the 3rd free segment, thirdly anchoring section, respectively
After the length of some anchoring section and free segment should ensure that anchor pole squeezes into boring, the anchor bar body of the first free segment is in and encloses
The relaxation zone of rock, thirdly the anchor bar body of anchoring section is in the elastic region of country rock, and the anchor bar body of remaining section is in
The plastic zone of country rock.
2. the anchoring process of multistage anchoring type resin anchor as claimed in claim 1, it is characterised in that
The first step: hole on the roadway surrounding rock needing anchoring, drilling depth is equal to rock-bolt length；
Second step: push in boring by the anchor pole processed, is arranged on rig on anchor bar body appears, starts
Rig, anchor bar body advances and rotates, and breaks double-component resin anchoring cartridge by dentation cutting ring, is continuing rotation
Under Zhuaning, the double-component resin anchoring agent composition in double-component resin anchoring cartridge is stirred, solidification, make anchor
The body of rod is bonded together closely with country rock；
3rd step: after double-component resin anchoring agent is solidified to some strength, loads onto aperture preloader, passes through
The nut of pre-pressing structure applies pretightning force, make the first free segment just in relaxation zone, first anchoring section,
Second free segment, second point anchoring section, the 3rd free segment are in plastic zone, and thirdly anchoring section is in elasticity
District.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030080.5A CN103758551B (en) | 2014-01-22 | 2014-01-22 | Multistage anchoring type resin anchor and anchoring process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410030080.5A CN103758551B (en) | 2014-01-22 | 2014-01-22 | Multistage anchoring type resin anchor and anchoring process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103758551A CN103758551A (en) | 2014-04-30 |
| CN103758551B true CN103758551B (en) | 2017-01-04 |
Family
ID=50525850
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410030080.5A Expired - Fee Related CN103758551B (en) | 2014-01-22 | 2014-01-22 | Multistage anchoring type resin anchor and anchoring process thereof |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018863A (en) * | 2014-05-16 | 2014-09-03 | 山东科技大学 | Multi-section-expansion yielding prestress grouting anchor rod and using method thereof |
| CN104061010A (en) * | 2014-07-10 | 2014-09-24 | 中国电建集团中南勘测设计研究院有限公司 | Rock anchor rod capable of conducting segmented anchoring |
| CN104278998B (en) * | 2014-09-22 | 2016-05-04 | 山东科技大学 | For the both-end anchoring type anchor pole of roadway surrounding rock |
| CN104632259B (en) * | 2014-12-31 | 2017-01-11 | 中国矿业大学 | End-head self-expansion enlarging type anchoring method for soft and weak stratum |
| CN104819003B (en) * | 2015-04-01 | 2017-12-12 | 中国矿业大学 | A kind of full anchor anchor for being easier to apply pretightning force |
| ES2827019T3 (en) * | 2015-05-08 | 2021-05-19 | Normet International Ltd | Locally Anchored Self Tapping Hollow Rock Bolt |
| CN104989437B (en) * | 2015-07-23 | 2017-12-26 | 河南理工大学 | A kind of anchor cable subregion anchoring segmentation pretension CONTROL OF STRATA MOVEMENT method |
| CN109404024B (en) * | 2018-10-12 | 2020-07-31 | 河南理工大学 | Construction method of multi-section anchoring ring type segmented anchoring bolt structure |
| CN109706927A (en) * | 2019-01-21 | 2019-05-03 | 吉林建筑大学 | A kind of preparation method of Prestressed Rock soil anchor bolt and its free segment |
| CN110593929B (en) * | 2019-10-28 | 2024-06-18 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Secondary multi-section anchoring anchor cable and application method thereof |
| CN114483138B (en) * | 2022-01-25 | 2022-12-02 | 中国矿业大学 | Anchoring end self-repairing type anchor rod anchoring device and using method thereof |
| CN114941545B (en) * | 2022-06-17 | 2023-03-14 | 东北大学 | Anchor cable multi-section hole-expanding resin anchoring body performance enhancing device and working method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2010281691B2 (en) * | 2009-08-05 | 2014-05-15 | F.M. Locotos Co., Inc. | Tensionable tubular resin anchored tubular bolt and method |
| CN202338351U (en) * | 2011-11-30 | 2012-07-18 | 中国神华能源股份有限公司 | Anchor cable structure and anchor device provided with same |
| CN102536278B (en) * | 2012-01-15 | 2015-01-28 | 山东科技大学 | Progressive yielding combined-type extensible anchor rod and construction method thereof |
| CN102619226B (en) * | 2012-04-19 | 2014-11-05 | 杭州图强工程材料有限公司 | Pressure dispersion type yielding anchor cable |
| CN102678145A (en) * | 2012-04-20 | 2012-09-19 | 中钢集团马鞍山矿山研究院有限公司 | Efficient novel construction method for resin anchor rod |
| CN203022008U (en) * | 2013-01-01 | 2013-06-26 | 中国建筑西南勘察设计研究院有限公司 | Pulling-compressing compound type anchor tension shoring structure in soil-rock place |
| CN103061345A (en) * | 2013-02-01 | 2013-04-24 | 中铁二院工程集团有限责任公司 | Pressure dispersion-type anchorage cable crushing prevention grouting bearing plate structure |
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| CN103758551A (en) | 2014-04-30 |
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Granted publication date: 20170104 Termination date: 20170122 |