CN102536283B - Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane - Google Patents
Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane Download PDFInfo
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- CN102536283B CN102536283B CN201210049834.2A CN201210049834A CN102536283B CN 102536283 B CN102536283 B CN 102536283B CN 201210049834 A CN201210049834 A CN 201210049834A CN 102536283 B CN102536283 B CN 102536283B
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Abstract
The invention relates to a retractable constant force yielding anchor bolt for a dynamical pressure soft rock lane. The retractable constant force yielding anchor bolt consists of an anchor bolt body, a tray, a pull rod, a pre-tightening adjusting bolt, a main spring, a pin roll, a knife-shaped cam, an auxiliary spring, an anchor head framework, a roller, a roller rack and a nut, wherein the anchor bolt body is in threaded connection with the pull rod; the tray can move along the pull rod under the action of an external force; and in the moving process, a synthetic pre-tightening force to the tray caused by the main spring and the auxiliary spring is basically kept unchanged, namely the constant force is kept. When surrounding rocks of the dynamical pressure soft rock lane are deformed, the tray moves through belt load and yield so as to release the stress. After the surrounding rocks relive the pressure, the tray moves back for strengthening and realizes secondary reinforcing for the surrounding rocks. When the surrounding rocks are repeatedly deformed due to stress disturbance, the anchor bolt can form 'yielding-supporting-yielding circular support and flexible support for the surrounding rocks, and thus the damage on the lane is avoided. The retractable constant force yielding anchor bolt disclosed by the invention is ingenious in design and compact in structure; the tray has long moving stroke; and except an anchor bolt body, other parts of the retractable constant force yielding anchor bolt can be detached for recycling, so that the cost is saved.
Description
Technical field:
The present invention relates to underground engineering support device field, relate in particular to a kind of retractable constant force yielding anchor bolt for dynamical pressure soft rock lane.
Background technology:
Along with the increase of the coal mining degree of depth, soft rock problem is more and more serious, and a supporting difficult problem for dynamic pressure soft-rock tunnel is more and more outstanding.Dynamic pressure soft-rock tunnel has three features: the one, and the residing rock mass circumstance complication of country rock, rock mass is weak, broken, loose, is subject to disturbing influence frequent; The 2nd, the physical and mechanical properties of country rock is special, and rock strength is low, weathering is serious, and rheological characteristic is large; The 3rd, tunnel is pressed and is manifested strong and unstable, and the country rock initial stage presses soon, and deflection is large, stable after country rock still with certain speed, continue for a long time large deformation, the stability of country rock is difficult to control.Therefore, dynamic pressure soft-rock tunnel is often damaged, and need to carry out special supporting.Existing conventional dynamic pressure soft rock supporting mode is mainly divided into two classes: a class is to use the overlapping fastener that adds of U-shaped steel, makes the frame of frictional force.This steel frame is arranged on when press in the Shang，Dang tunnel, tunnel of having opened up or distortional stress bears frictional resistance over frame in advance, and equitant U-shaped steel holds up slip, after the preliminary release of country rock, tends to balance, thereby reach roadway surrounding rock, keeps complete and stability.But this support pattern consumption steel material is large, and labour intensity is high, and investment is many.Another kind of mode is to take shotcrete as main serial support technology, comprises shotcrete, the spray of anchor net, shotcrete rack, anchor notes, prestressing anchor support etc.Wherein, relatively low with shotcrete series technique cost, be the major way of dynamic pressure soft rock supporting.But shotcrete series support pattern must be used anchor pole.Situation, Support Resistance that existing anchor pole is difficult to adapt to the TERM DEFORMATION of dynamic pressure soft-rock tunnel are not enough, and roadway deformation amount is large.The nut of anchor pole, screw thread, pallet, the body of rod and Anchor Agent are because these members and technology are etc. not strong, while using in dynamic pressure soft-rock tunnel, affected by dynamic pressure and cause screw thread stripped thread, pallet fragmentation or Anchor Agent powerful not enough, cause wall rock loosening, inbreak and being damaged, thereby affect normal production and safety, and increased the cost of development.
External Extendable anchor rod has the crooked undaform of the body of rod of the Thyssen Xing Ji former Soviet Union, and such anchor pole constant-resistance working stage is unstable, can not accomplish the steady carrying of anchor pole, and the impact of pressing of being hit is larger.Domestic most typical Extendable anchor rod mainly contains China Mining University's " H type " and " modified " rockbolts with extensible rod, the Extendable anchor rod of " H type " and " modified ", anchor pole afterbody has been carried out to machining and heat treatment, higher intensity and the elongation per unit length that can bring into play anchor pole of afterbody intensity.Application number is that the patent of 96115683.X has proposed equi-strength prop pressure-relieving achor always, and by changing the yield tensile ratio of anchor bar body round steel, the method for adjusting material makes anchor pole possess the performance that certain on-load extends.Application number is that 86208821 patent has proposed a kind of telescopic type anchoring-bolt, this anchor pole is comprised of the head not moving and afterbody, pad, pad retainer ring that can be certain, head and the afterbody of anchor pole consist of interference fit, and when country rock deforms, the head of anchor pole and afterbody can produce relative displacement.Yet, studies confirm that the increasing resistance speed of above-mentioned Extendable anchor rod is no more than traditional resin anchor, after ought reaching the yield strength of anchor pole, the Support Resistance of anchor pole declines rapidly simultaneously, can not reach constant working resistance state, and lever strength is little, complex structure, is subject to disturbing influence, all can not adapt to the distortion of dynamic pressure soft-rock tunnel, the deformation energy of country rock cannot be absorbed, " allowing-Zhi " circulation can not be accomplished.
In addition, the Duan Changchen of Anhui University of Science and Technology and Zhang Xiangyang etc. propose a kind of mentality of designing of Hydraulic coupling anchor pole, the anchor pole of design is, at the afterbody of common metal anchor pole, a kind of regulatable hydraulic means is installed, can form with country rock the circulation coupling of " preliminary bracing, rationally allow pressure, secondary reinforcement ", and supporting monitoring device can be to the stressed Real-Time Monitoring that carries out of roadway surrounding rock.But this anchor rod system needs pressure sensor and monitoring system, make supporting increase too high.
Summary of the invention:
Technical problem to be solved by this invention; to overcome above-mentioned the deficiencies in the prior art; a kind of retractable constant force yielding anchor bolt for dynamical pressure soft rock lane is provided; being arranged on pallet on anchor pole can realize large displacement on-load and move and allow pressure when country rock deforms; with protection suspension device, avoid tunnel destroyed.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of retractable constant force yielding anchor bolt for dynamical pressure soft rock lane, regulates spiral shell inspection, main spring, bearing pin, cuitellate cam, auxiliary spring, anchorage head framework, roller, turning rolls and nut to form by anchor bar body, pallet, pull bar, pretension.Wherein, the afterbody of described anchor bar body is provided with external screw thread, and the head of pull bar is provided with internal thread, and anchor bar body is connected by screw thread with pull bar; Tray sleeve, on pull bar, and is connected with anchorage head framework by pretension adjusting bolt and nut; Turning rolls is fixed on the afterbody of pull bar, and main spring is enclosed within on pull bar, and between turning rolls and pallet; The axis of two relative pull bars of cuitellate cam is arranged symmetrically, and one end of cuitellate cam is connected with anchorage head framework by bearing pin, and can rotate around bearing pin, and the other end and the roller of cuitellate cam remain contact condition; One end of auxiliary spring is fixed on anchorage head framework, and its other end is connected with cuitellate cam, and the axis of two relative pull bars of auxiliary spring is arranged symmetrically; Roller is arranged on turning rolls, and the axis of two relative pull bars of roller is arranged symmetrically.Pallet can move along pull bar under external force, and simultaneously roller rolls along the outline of cuitellate cam, and the synthetic pretightning force that main spring and auxiliary spring produce pallet in the moving process of pallet remains unchanged substantially, keeps constant force.
Described pallet is provided with a centre bore and two bolts hole, and the axis of two relative centre bores of bolt hole is arranged symmetrically.
When country rock deforms, pallet can be along outside mobile pressures that allow of pull bar on-load, and to discharge stress, and pallet moves while allowing pressure and can keep constant force at on-load.After country rock release completes, pallet is travelling backwards reinforcement under the effect of main spring and auxiliary spring, realizes the second consolidation to country rock.When country rock deforms repeatedly due to stress disturbance, pallet again on-load moves outward to allow and presses and travelling backwards, forms " allow-Zhi-allow " circulation supporting and the flexible support to country rock.The present invention designs ingenious, compact conformation, and pallet shift motion is large, has not only solved the problem that existing anchor pole can not adapt to dynamic pressure soft-rock tunnel aximal deformation value, and recycles after all detachable except anchor bar body, cost-saving.
Accompanying drawing explanation:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of pallet.
In Fig. 1: 1 anchor bar body; 2 pallets; 3 pull bars; 4 pretension adjusting bolts; 5 main springs; 6 bearing pins; 7 cuitellate cams; 8 auxiliary springs; 9 anchorage head frameworks; 10 rollers; 11 turning rollss; 12 nuts; 13 Anchor Agents.
In Fig. 2: 2 pallets; 21 centre bores; 22 bolts hole.
The specific embodiment:
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with specific embodiment and diagram, further set forth the present invention.
As shown in Figure 1, a retractable constant force yielding anchor bolt for dynamical pressure soft rock lane, is comprised of anchor bar body 1, pallet 2, pull bar 3, pretension adjusting bolt 4, main spring 5, bearing pin 6, cuitellate cam 7, auxiliary spring 8, anchorage head framework 9, roller 10, turning rolls 11 and nut 12.Wherein, the afterbody of described anchor bar body 1 is provided with external screw thread, and the head of pull bar 3 is provided with internal thread, and anchor bar body 1 is connected by screw thread with pull bar 3; Pallet 2 is enclosed within on pull bar 3, and is connected with anchorage head framework 9 by pretension adjusting bolt 4 and nut 12; Turning rolls 11 is fixed on the afterbody of pull bar 3, and main spring 5 is enclosed within on pull bar 3, and between turning rolls 11 and pallet 2; The axis of two cuitellate cam 7 relative pull bars 3 is arranged symmetrically, and one end of cuitellate cam 7 is connected with anchorage head framework 9 by bearing pin 6, and can rotate around bearing pin 6, and the other end of cuitellate cam 7 and roller 10 remain contact condition; One end of auxiliary spring 8 is fixed on anchorage head framework 9, and its other end is connected with cuitellate cam 7, and the axis of two auxiliary spring 8 relative pull bars 3 is arranged symmetrically; Roller 10 is arranged on turning rolls 11, and the axis of two roller 10 relative pull bars 3 is arranged symmetrically.Pallet 2 can move along pull bar 3 under external force, and simultaneously roller 10 rolls along the outline of cuitellate cam 7, and the synthetic pretightning force that main spring 5 and 8 pairs of pallets of auxiliary spring 2 produce in the moving process of pallet 2 remains unchanged substantially, keeps constant force.
As shown in Figure 2, described pallet 2 is provided with a centre bore 21 and two bolts hole 22, and the axis of two bolt hole 22 relative centre bores 21 is arranged symmetrically.
During use, first in the anchor hole having bored, inject Anchor Agent 13, then insert rapidly anchor bar body 1, on near the country rock afterbody of anchor bar body 1, hang up anchor net (or anchor cable), again the pallet 2 that installs pretension adjusting bolt 4 is enclosed within on pull bar 3, then the head of pull bar 3 is connected by screw thread with the afterbody of anchor bar body 1.After Anchor Agent 13 solidifies, according to actual condition require adjusting nut 12, and then regulate the pretightning force of anchor pole.
When the country rock of dynamic pressure soft-rock tunnel deforms, anchor bar body 1 and pallet 2 tensions.Due to the effect of the anchored force between anchor bar body 1 and rock mass, form an integral body with rock mass, pallet 2 just along with under surrouding rock deformation and its action of pulling stress producing along the outside mobile pressure that allows of pull bar 3 on-loads, to discharge stress, and pallet 2 moves to allow while pressing at on-load and can keep constant force.After country rock release completes, pallet 2 travelling backwards reinforcement under the effect of main spring 5 and auxiliary spring 8, realizes the second consolidation to country rock.When country rock deforms repeatedly due to stress disturbance, pallet again on-load moves outward to allow and presses and travelling backwards, forms " allow-Zhi-allow " circulation supporting and the flexible support to country rock.The present invention designs ingenious, compact conformation, and pallet shift motion is large, recycles after all detachable except anchor bar body, cost-saving.
More than show and described basic principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and manual, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. a retractable constant force yielding anchor bolt for dynamical pressure soft rock lane, by anchor bar body, pallet, pull bar, pretension adjusting bolt, main spring, bearing pin, cuitellate cam, auxiliary spring, anchorage head framework, roller, turning rolls and nut, formed, it is characterized in that: the afterbody of described anchor bar body is provided with external screw thread, the head of pull bar is provided with internal thread, and anchor bar body is connected by screw thread with pull bar; Tray sleeve, on pull bar, and is connected with anchorage head framework by pretension adjusting bolt and nut; Turning rolls is fixed on the afterbody of pull bar, and main spring is enclosed within on pull bar, and between turning rolls and pallet; The axis of two relative pull bars of cuitellate cam is arranged symmetrically, and one end of cuitellate cam is connected with anchorage head framework by bearing pin, and can rotate around bearing pin, and the other end and the roller of cuitellate cam remain contact condition; One end of auxiliary spring is fixed on anchorage head framework, and its other end is connected with cuitellate cam, and the axis of two relative pull bars of auxiliary spring is arranged symmetrically; Roller is arranged on turning rolls, and the axis of two relative pull bars of roller is arranged symmetrically.
2. a kind of retractable constant force yielding anchor bolt for dynamical pressure soft rock lane according to claim 1, is characterized in that: described pallet is provided with a centre bore and two bolts hole, and the axis of two relative centre bores of bolt hole is arranged symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210049834.2A CN102536283B (en) | 2012-02-24 | 2012-02-24 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210049834.2A CN102536283B (en) | 2012-02-24 | 2012-02-24 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
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| CN102536283A CN102536283A (en) | 2012-07-04 |
| CN102536283B true CN102536283B (en) | 2014-03-05 |
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| CN201210049834.2A Active CN102536283B (en) | 2012-02-24 | 2012-02-24 | Retractable constant force yielding anchor bolt for dynamical pressure soft rock lane |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401629A (en) * | 2016-12-14 | 2017-02-15 | 安徽理工大学 | Yielding anchor rod capable of monitoring yielding amount in real-time |
| CN107083980B (en) * | 2017-06-15 | 2023-06-30 | 湖南科技大学 | Surrounding rock disaster early warning method and anchor early warning device for anchor bolt supporting roadway |
| CN107421588B (en) * | 2017-08-25 | 2020-03-31 | 吉林建筑大学 | Fiber bragg grating sensing mine safety monitoring system with anchor rod as sensing medium |
| CN109798141B (en) * | 2019-01-25 | 2024-01-09 | 武汉科技大学 | Angle-adjustable inclined plane anchor rod tray |
| CN112392526A (en) * | 2020-12-08 | 2021-02-23 | 天地科技股份有限公司 | Anchor rod assembly and anchor rod pre-tightening device |
| CN113294187B (en) * | 2021-05-24 | 2023-08-04 | 上海应用技术大学 | Telescopic anchor rod and construction method thereof |
| CN115520742B (en) * | 2022-10-27 | 2023-08-18 | 中国城市建设研究院有限公司 | Building |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144876A (en) * | 1996-03-08 | 1997-03-12 | 李占英 | Equi-strength prop pressure-relieving achor bar for expansive soft rock |
| KR20100132222A (en) * | 2009-06-09 | 2010-12-17 | 박재현 | Reinforce unit for grouting and grouting reinforce method using the same |
| CN102031873A (en) * | 2010-10-29 | 2011-04-27 | 天地科技股份有限公司 | Hydraulic tensioner of fixed-torque locking prestressed anchor |
| CN202441402U (en) * | 2012-02-24 | 2012-09-19 | 安徽理工大学 | Telescopic constant force yield anchor bolt for dynamic pressure soft rock roadway |
-
2012
- 2012-02-24 CN CN201210049834.2A patent/CN102536283B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144876A (en) * | 1996-03-08 | 1997-03-12 | 李占英 | Equi-strength prop pressure-relieving achor bar for expansive soft rock |
| KR20100132222A (en) * | 2009-06-09 | 2010-12-17 | 박재현 | Reinforce unit for grouting and grouting reinforce method using the same |
| CN102031873A (en) * | 2010-10-29 | 2011-04-27 | 天地科技股份有限公司 | Hydraulic tensioner of fixed-torque locking prestressed anchor |
| CN202441402U (en) * | 2012-02-24 | 2012-09-19 | 安徽理工大学 | Telescopic constant force yield anchor bolt for dynamic pressure soft rock roadway |
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Owner name: NANTONG ZHONGYI BOILER EQUIPMENT CO., LTD. Free format text: FORMER OWNER: ANHUI UNIV. OF SCIENCE + TECHNOLOGY Effective date: 20141114 |
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Free format text: CORRECT: ADDRESS; FROM: 232001 HUAINAN, ANHUI PROVINCE TO: 226300 NANTONG, JIANGSU PROVINCE |
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Effective date of registration: 20141114 Address after: 226300 industrial concentration area of Xingren Town, Nantong, Jiangsu, Tongzhou District (Sun Jiaqiao) Patentee after: NANTONG ZHONGYI BOILER EQUIPMENT CO., LTD. Address before: 232001 Anhui Province, Huainan city Shungeng Road No. 168 Patentee before: Anhui University Of Science And Technology |