CN103899341B - Pressure-bearing type end anchor high pretightening force anchor rod support method - Google Patents
Pressure-bearing type end anchor high pretightening force anchor rod support method Download PDFInfo
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- CN103899341B CN103899341B CN201410124180.4A CN201410124180A CN103899341B CN 103899341 B CN103899341 B CN 103899341B CN 201410124180 A CN201410124180 A CN 201410124180A CN 103899341 B CN103899341 B CN 103899341B
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- Prior art keywords
- anchor
- anchor pole
- sleeve pipe
- resin
- pole
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000011435 rock Substances 0.000 claims abstract description 33
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000002360 explosive Substances 0.000 claims abstract description 10
- 238000005553 drilling Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000007596 consolidation process Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000008093 supporting effect Effects 0.000 abstract description 14
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 239000011083 cement mortar Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
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- Road Signs Or Road Markings (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of pressure-bearing type end anchor high pretightening force anchor rod support method, is applicable to the surrounding rock supporting in mine tunnel engineering.The present invention one is that anchor pole country rock at the bottom of bottom, hole is by resin explosive roll and bolthole fully coheres, and realizes end anchorage effect, two is the sleeve pipes installing PVC sleeve pipe or similar material on free segment anchor bar body, and adopt cement mortar to be filled in the space between sleeve pipe and bolthole, body and bolthole country rock well-bonded, because of the existence of sleeve pipe, body and anchor pole are without cohering, can ensure to apply pretightning force at Different periods to anchor pole, the pretightning force of anchor pole can be made to increase substantially simultaneously, especially under weak surrounding rock condition, if resin end anchor section because of tension there is displacement time, pretightning force can be born by free segment injecting cement paste, thus ensure the supporting usefulness of prestressed anchor to greatest extent, be conducive to deep laneway surrounding rock stability and security.
Description
Technical field
The present invention relates to pressure-bearing type end anchor high pretightening force anchor rod support method, be particularly useful for the control of deep tunnel weak surrounding rock stability; Also supporting and the maintenance of mine tunnel engineering and high gradient slope engineering is applicable to.
Background technology
Prestressed anchor supporting is the technical way that current deep tunnel displacement stability controls.The anchorage style of anchor pole has end anchorage, full length fastening and the extensible bolting several.
During end anchorage, free section is long, and the sphere of action of anchor rod prestress is large, and the effective compressive stress district thickness formed is large, but in the middle part of free section, compressive stress is little, thus affects anchoring effect.Axis force of anchor is except anchored end, its body of rod is stressed is equally distributed along its length, and within the scope of anchoring, the absciss layer of rock stratum, any position is distributed in the length of the whole body of rod all equably, thus cause the body of rod stressed to surrouding rock deformation and absciss layer insensitive, the rigidity of support system is low.In order to improve the rigidity of end-fixed bolter, larger prestressing force can only be applied, but when country rock is weak loose, anchored end is easily subjected to displacement even slip, causes anchor pole to lose efficacy.
During full length fastening, free section is short, anchor rod prestress sphere of action is than little during end anchor, the effective compressive stress district thickness formed is little, now anchor rod body stress, strain along rock-bolt length directional spreding extremely uneven, absciss layer is very large with the large position rockbolt stress that slides, the body of rod and injecting cement paste stressed to surrouding rock deformation and absciss layer very sensitive, the rigidity of support system is large.For injecting cement paste, be in tension state, stress performance is the poorest, and simultaneously because freedom length is less, prestress application is limited, fully can not realize active support.
Therefore, for the prestressed anchor supporting of Deep Soft Rock Tunnel, not only require the pretightning force that anchor pole can provide enough, to control absciss layer and the distortion of country rock, prevention anchor pole when holding anchor section slip still can provide effective enough supporting intensities again.
Summary of the invention
Technical problem: the object of the invention is to overcome the deficiency in existing bolt support technology, there is provided that a kind of structure is simple, anchoring effect good, can enough pretightning forces be applied and ensure the section partial failure of anchor pole end anchor or entirely ineffective time, anchor pole still can provide the pressure-bearing type end anchor high pretightening force anchor rod support method of enough supporting intensities.
Technical scheme: pressure-bearing type end anchor high pretightening force anchor rod support method of the present invention, comprises the steps:
A, the requirement controlled according to roadway surrounding rock condition and stability, design bolt pretension size, end anchor section anchorage length and bolt interval, by design parameters construction armature boring;
B, installation end anchor resin anchor, the anchor pole first head being equipped with resin explosive roll is sent in the armature boring of having constructed and is carried out end anchor, then PVC sleeve pipe is installed on free section, at drilling orifice place, Grouting Pipe and stack are set, use sealing-plug fixing PVC sleeve pipe, Grouting Pipe and stack afterwards, and seal up aperture, finally, anchor pole revealed section is installed the nut of the anchor rod pallet board 2 and fastening anchor rod pallet board leaned at drilling orifice periphery;
C, to nut apply pretightning force, until reach designing requirement;
D, in armature boring, inject cement mortar by Grouting Pipe, make to be full of slurries between PVC sleeve pipe and armature boring wall, till stack has slurries to flow out,
E, according to on-the-spot country rock situation, again or repeatedly can apply pretightning force to nut.
Beneficial effect: the present invention one is that anchor pole country rock at the bottom of bottom, hole is by resin explosive roll and bolthole fully coheres, and realizes end anchorage effect, two is the sleeve pipes installing PVC sleeve pipe or similar material on free segment anchor bar body, and adopt cement mortar to be filled in the space between sleeve pipe and bolthole, body and bolthole country rock well-bonded, because of the existence of sleeve pipe, body and anchor pole are without cohering, thus can ensure to apply pretightning force at Different periods to anchor pole, the pretightning force of anchor pole can be made to increase substantially simultaneously, especially under weak surrounding rock condition, if resin end anchor section because of tension there is displacement time, pretightning force can be born by free segment injecting cement paste, thus ensure the supporting usefulness of prestressed anchor to greatest extent, be conducive to deep laneway surrounding rock stability and security.The present invention had both achieved the end anchorage effect of anchor pole, again because of the existence of free segment anchor bar body, and conveniently apply pretightning force, simultaneously can when anchoring section deforms mobile because of rock mass weakness, because of the existence of free segment injecting cement paste, the supporting usefulness of anchor pole is still kept, namely injecting cement paste bears pressure effect.Fully can ensureing the supporting effect of Deep Soft Rock Tunnel prestressed anchor, both ensure that anchor pole applied enough pretightning forces to roadway surrounding rock, ensureing that again anchor pole still can provide enough supporting intensities and support rigidity when holding anchor to lose efficacy.Compared with traditional prestressing force end-fixed bolter support technology, mortar Full-grouted Bolt support technology, tool has the following advantages:
1) the PVC sleeve pipe due to free segment rockbolt installation, provides condition for applying pretightning force to anchor pole under slip casting condition;
2) at the rockbolt installation initial stage, owing to adopting resin end anchor structure, thus can provide enough pretightning forces to roadway surrounding rock in time, give full play to effect of anchor pole active support, and controlling initial deformation and the absciss layer of roadway surrounding rock, the globality and the stability that are conducive to country rock control;
3) due to the gap between free segment anchor pole hole wall and PVC sleeve pipe by cement mortar is full of, thus ensure that and to be subjected to displacement or under the rough sledding that lost efficacy in anchor pole end anchor section, free segment injecting cement paste can bear as bearing structure the pressure that resin anchoring end transmits, and does not make anchor pole lose efficacy under weak surrounding rock condition;
4) free segment body bears the pressure transmitted by resin anchoring end, has given full play to the feature that cement mortar material load performance is better than examining tensile behavior, thus has more superior service behaviour than full length fastening tension type anchor pole.
5) this anchor pole has good displacement Ductility, and namely anchor pole has very large displacement before supporting destroys, and this is just for surrounding rock supporting provides a kind of early warning, and when bolt support simultaneously destroys, bearing capacity can not obviously decline, and residual strength is higher.
6) because free segment injecting cement paste is in three dimension stress state, enhance the extrusion friction of anchor pole and country rock, the maximum pretightning force that anchor pole can bear has larger raising compared with prestressed anchor and mortar Bolt, and in this case the anti-corrosive properties of anchor pole and durability also relatively good.
Accompanying drawing explanation
Fig. 1 is surrounding rock supporting structural representation of the present invention.
In figure: 1-nut; 2-anchor rod pallet board; 3-stack; 4-Grouting Pipe; 5-sealing-plug; 6-anchor pole; 7-PVC sleeve pipe; 8-armature boring; 9-resin explosive roll; 10-country rock.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Pressure-bearing type end anchor high pretightening force anchor rod support method of the present invention, concrete steps are as follows:
A, the requirement controlled according to roadway surrounding rock condition and stability, design bolt pretension size, end anchor section anchorage length and bolt interval, by design parameters at design attitude jumbolter Drilling armature boring 8 in country rock 10, and by clean for armature boring cleaning;
B, installation end anchor resin anchor, on request by resin explosive roll 9 load hole, according to the end anchor length of design, the anchor pole 6 first head being equipped with resin explosive roll is sent in the armature boring of having constructed and is carried out end anchor, then on anchor pole 6 free segment, PVC sleeve pipe 7 is installed, PVC sleeve pipe 7 is arranged on anchor pole 6 from end anchor section top to this segment distance of free segment top, then Grouting Pipe 4 and stack 3 are set at drilling orifice place, Grouting Pipe 4 is fixed on the lower end of anchor pole 6, apart from place (along anchor pole in downward direction) the bonding stack 3 of end anchor section top certain distance on PVC sleeve pipe 7, ensure smooth gas discharge, afterwards with urethane seal plug 5 fixing PVC sleeve pipe 7, Grouting Pipe 4 and stack 3, and seal up aperture, with cotton yarn by tight for the encapsulation of sealing-plug 5 surrounding, agitating resin powder stick 9, after resin explosive roll 9 consolidation is complete, anchor pole revealed section is installed the nut 1 of the anchor rod pallet board 2 and fastening anchor rod pallet board 2 leaned at drilling orifice periphery,
C, then apply high pretightening force with torque amplification tightening nut 1 pair of anchor pole 6 and carry out stretch-draw, until reach designing requirement;
D, configure cement grout, in armature boring 8, inject cement grout by Grouting Pipe 4, make the space between PVC sleeve pipe 7 and armature boring wall be full of slurries, till stack 3 has slurries to flow out;
E, because body and anchor pole 6 are without cohering, thus can ensure to apply pretightning force at Different periods to anchor pole, the pretightning force of anchor pole can be made to increase substantially simultaneously, according to on-the-spot country rock situation, again or repeatedly can apply pretightning force to nut 1.
Claims (1)
1. a pressure-bearing type end anchor high pretightening force anchor rod support method, is characterized in that, comprise the steps:
A, the requirement controlled according to roadway surrounding rock condition and stability, design bolt pretension size, end anchor section anchorage length and bolt interval, by design parameters in construction armature boring (8) in country rock (10) of design attitude jumbolter, and by clean for armature boring cleaning;
B, installation end anchor resin anchor, on request by resin explosive roll (9) load hole, according to the end anchor length of design, the anchor pole (6) first head being equipped with resin explosive roll is sent in the armature boring of having constructed and is carried out end anchor, then on anchor pole (6) free segment, PVC sleeve pipe (7) is installed, Grouting Pipe (4) and stack (3) are set at drilling orifice place, Grouting Pipe (4) is fixed on the lower end of anchor pole (6), in downward direction to bond stack (3) at PVC sleeve pipe (7) upper end edge anchor pole, ensure smooth gas discharge, use sealing-plug (5) fixing PVC sleeve pipe (7) afterwards, Grouting Pipe (4) and stack (3), and seal up aperture, with cotton yarn by tight for the encapsulation of sealing-plug (5) surrounding, agitating resin powder stick (9), after resin explosive roll (9) consolidation is complete, anchor pole revealed section is installed the nut (1) of anchor rod pallet board (2) and the fastening anchor rod pallet board (2) leaned at drilling orifice periphery,
C, with torque amplification tightening nut (1) to anchor pole (6) apply high pretightening force carry out stretch-draw, until reach designing requirement;
D, configure cement grout, in armature boring (8), cement grout is injected by Grouting Pipe (4), make to be full of slurries between PVC sleeve pipe (7) and armature boring wall, till stack (3) has slurries to flow out;
E, according to on-the-spot country rock situation, again or repeatedly pretightning force is applied to nut (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124180.4A CN103899341B (en) | 2014-03-28 | 2014-03-28 | Pressure-bearing type end anchor high pretightening force anchor rod support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410124180.4A CN103899341B (en) | 2014-03-28 | 2014-03-28 | Pressure-bearing type end anchor high pretightening force anchor rod support method |
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| CN103899341A CN103899341A (en) | 2014-07-02 |
| CN103899341B true CN103899341B (en) | 2016-04-20 |
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| CN201410124180.4A Expired - Fee Related CN103899341B (en) | 2014-03-28 | 2014-03-28 | Pressure-bearing type end anchor high pretightening force anchor rod support method |
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| CN104405424A (en) * | 2014-11-17 | 2015-03-11 | 神华集团有限责任公司 | Full-length-anchoring anchor rod and anchoring method |
| CN104453961B (en) * | 2014-11-17 | 2016-07-27 | 成都理工大学 | A kind of overlapping seam type friction-type constant-resistance anchor pole |
| CN104632260B (en) * | 2015-03-19 | 2017-09-29 | 中国长江三峡集团公司 | A kind of high solidity bolt grouting method |
| CN106223990B (en) * | 2016-07-27 | 2018-10-02 | 屈荐映 | A kind of building municipal works anchor pole |
| CN107013238A (en) * | 2017-03-20 | 2017-08-04 | 化工部长沙设计研究院 | Resin mortar combined bolt support structure and its construction method |
| CN107676121B (en) * | 2017-11-10 | 2024-05-14 | 长安大学 | Tunnel prestressed anchor rod and anchoring method |
| CN109083665B (en) * | 2018-10-17 | 2024-05-28 | 河南理工大学 | Full-length anchoring anchor rod device and anchoring construction method thereof |
| CN109443595A (en) * | 2018-11-16 | 2019-03-08 | 西南交通大学 | The in-situ testing device and its home position testing method of tunnel homoiothermal ring |
| CN109406007A (en) * | 2018-12-07 | 2019-03-01 | 中铁隧道局集团有限公司 | A kind of severe cold area Railway Tunnel country rock temperature field testing device and its method for embedding |
| CN110230511B (en) * | 2019-06-21 | 2020-10-09 | 安徽理工大学 | Anchor grouting device capable of exhausting gas for common anchor rod and using method thereof |
| CN114319345B (en) * | 2022-02-14 | 2023-08-04 | 大成科创基础建设股份有限公司 | Glass fiber anchor rod anchor fixing device and construction method |
| CN115559759A (en) * | 2022-10-29 | 2023-01-03 | 华能澜沧江水电股份有限公司 | Deep lamellar surrounding rock large deformation active control method and device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139323A (en) * | 1976-06-01 | 1979-02-13 | Gebirgssicherung - Ges.M.B.H. | Rock anchor |
| CN2229515Y (en) * | 1994-08-31 | 1996-06-19 | 王永胜 | End anchor type anchoring-bolt with recoverable bolt body |
| CN1712670A (en) * | 2005-07-13 | 2005-12-28 | 吴德兴 | Slip casting roof bolt with anticorrosive casing pipe |
| CN102022129A (en) * | 2010-10-15 | 2011-04-20 | 山西潞安环保能源开发股份有限公司五阳煤矿 | Anchorage length limit device for grouting anchor cable |
| CN102359386A (en) * | 2011-10-28 | 2012-02-22 | 湖南科技大学 | Shearing sleeve type yielding bolt |
| CN102536278A (en) * | 2012-01-15 | 2012-07-04 | 山东科技大学 | Progressive yielding combined-type extensible anchor rod and construction method thereof |
| CN103032086A (en) * | 2012-12-07 | 2013-04-10 | 中国矿业大学 | Method for filling resin explosive cartridge in drilled hole of tunnel roof anchor rod |
-
2014
- 2014-03-28 CN CN201410124180.4A patent/CN103899341B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139323A (en) * | 1976-06-01 | 1979-02-13 | Gebirgssicherung - Ges.M.B.H. | Rock anchor |
| CN2229515Y (en) * | 1994-08-31 | 1996-06-19 | 王永胜 | End anchor type anchoring-bolt with recoverable bolt body |
| CN1712670A (en) * | 2005-07-13 | 2005-12-28 | 吴德兴 | Slip casting roof bolt with anticorrosive casing pipe |
| CN102022129A (en) * | 2010-10-15 | 2011-04-20 | 山西潞安环保能源开发股份有限公司五阳煤矿 | Anchorage length limit device for grouting anchor cable |
| CN102359386A (en) * | 2011-10-28 | 2012-02-22 | 湖南科技大学 | Shearing sleeve type yielding bolt |
| CN102536278A (en) * | 2012-01-15 | 2012-07-04 | 山东科技大学 | Progressive yielding combined-type extensible anchor rod and construction method thereof |
| CN103032086A (en) * | 2012-12-07 | 2013-04-10 | 中国矿业大学 | Method for filling resin explosive cartridge in drilled hole of tunnel roof anchor rod |
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| CN103899341A (en) | 2014-07-02 |
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