CN102536283A - 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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- CN102536283A CN102536283A CN2012100498342A CN201210049834A CN102536283A CN 102536283 A CN102536283 A CN 102536283A CN 2012100498342 A CN2012100498342 A CN 2012100498342A CN 201210049834 A CN201210049834 A CN 201210049834A CN 102536283 A CN102536283 A CN 102536283A
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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 dynamic pressure soft-rock tunnel with scalable constant force pressure-relieving achor bar.
Background technology:
Along with the increase of the coal mining degree of depth, the soft rock problem is more and more serious, and the supporting difficult problem of dynamic pressure soft-rock tunnel is more and more outstanding.The dynamic pressure soft-rock tunnel has three characteristics: the one, and the residing rock mass circumstance complication of country rock, rock mass is weak, broken, loose, receives disturbing influence frequent; The 2nd, the physics and the mechanical property of country rock are special, and rock strength is low, weathering is serious, and rheological characteristic is big; The 3rd, the tunnel is pressed and is manifested strong and unstable, and the country rock initial stage presses soon, and deflection is big, and stable back country rock still continues large deformation with certain speed for a long time, and the stability of country rock is difficult to control.Therefore, the dynamic pressure soft-rock tunnel is often damaged, and need carry out special supporting.Existing dynamic pressure soft rock supporting mode commonly used mainly is divided into two types: one type is to use the overlapping fastener that adds of U shaped steel, makes the frame of frictional force.This steel frame is installed on the good tunnel of developing in advance, presses or distortional stress when surpassing frame and bearing frictional resistance when the tunnel, and equitant U shaped steel holds up slip, tends to balance after the preliminary release of country rock, and roadway surrounding rock is kept perfectly and stability thereby reach.It is big that but this support pattern consumes steel material, and labour intensity is high, and investment is many.Another kind of mode is to be master's serial support technology with the anchor spray, comprises anchor spray, the spray of anchor net, anchor and spray net frame, anchor notes, prestress anchorage cable supporting etc.Wherein, relatively low with anchor spray series technique cost, be the main mode of dynamic pressure soft rock supporting.But anchor sprays serial support pattern must use anchor pole.Situation, supporting resistance that existing anchor pole is difficult to adapt to the TERM DEFORMATION of dynamic pressure soft-rock tunnel are not enough, and the roadway deformation amount is big.The nut of anchor pole, screw thread, pallet, the body of rod and anchoring agent since these members and technology do not wait by force; Influenced by dynamic pressure when in the dynamic pressure soft-rock tunnel, using and cause screw thread stripped thread, pallet fragmentation or anchoring agent powerful not enough; Cause wall rock loosening; Inbreak and being damaged is produced and safety thereby influence is normal, and has increased the cost of development.
External extending anchor pole has the crooked undaform of the body of rod of the Thyssen type and the former Soviet Union, and such anchor pole constant-resistance working stage is unstable, can not accomplish the steady carrying of anchor pole, and the influence of pressing bigger with being hit." H type " that domestic most typical extending anchor pole mainly contains China Mining University reaches the extending anchor pole of " modified " body of rod; The extending anchor pole of " H type " and " modified "; The anchor pole afterbody machining and heat treatment have been carried out, 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 expansive soft rock equi-strength prop pressure-relieving achor bar always, and through changing the yield tensile ratio of anchor bar body round steel, the method for adjustment material makes anchor pole possess the performance that certain on-load extends.Application number is that 86208821 patent has proposed a kind of telescopic anchor pole; This anchor pole is made up of the head that does not move and afterbody, pad, spacers ring that can be certain; The head of anchor pole and afterbody are formed through interference fit, and the head of anchor pole and afterbody can produce relative displacement when country rock deforms.Yet that studies the above-mentioned extending anchor pole of confirmation increases resistance speed no more than the prior resin anchor pole, ought reach simultaneously after the yield strength of anchor pole; The supporting resistance of anchor pole descends rapidly, 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 can't be absorbed, " letting-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 pressure coupling anchor pole; The anchor pole of design is at the afterbody of common metal anchor pole a kind of regulatable hydraulic means to be installed; Make it and can form the circulation coupling of " preliminary bracing, rationally let pressure, secondary reinforcement ", and supporting monitoring device can be monitored in real time to roadway surrounding rock is stressed with country rock.But this anchor rod system needs pressure sensor and monitoring system, makes the supporting increase too high.
Summary of the invention:
Technical problem to be solved by this invention; It is the deficiency that overcomes above-mentioned prior art; Provide a kind of dynamic pressure soft-rock tunnel with scalable constant force pressure-relieving achor bar; Be installed in pallet on the anchor pole and can realize when country rock deforms that big displacement on-load moves and let pressure,, avoid the tunnel to be damaged with the protection suspension device.
For realizing above-mentioned purpose; The technical scheme that the present invention adopts is following: a kind of dynamic pressure soft-rock tunnel is regulated spiral shell inspection, main spring, bearing pin, cuitellate cam, auxilliary spring, anchorage head framework, roller, turning rolls and nut by anchor bar body, pallet, pull bar, pretension and is formed with scalable constant force pressure-relieving achor bar.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 through screw thread with pull bar; Tray sleeve and is regulated bolt and nut is connected with the anchorage head framework through pretension on pull bar; Turning rolls is fixed on the afterbody of pull bar, and main spring is enclosed within on the pull bar, and between turning rolls and pallet; The axis of two relative pull bars of cuitellate cam is symmetric arrangement, and an end of cuitellate cam is connected with the anchorage head framework through bearing pin, and can rotate around bearing pin, and the other end and the roller of cuitellate cam remain contact condition; One end of auxilliary spring is fixed on the anchorage head framework, and its other end is connected with cuitellate cam, and the axis of two relative pull bars of auxilliary spring is symmetric arrangement; Roller is installed on the turning rolls, and the axis of two relative pull bars of roller is symmetric arrangement.Pallet can move along pull bar under external force, and simultaneously roller rolls along the outline of cuitellate cam, and main spring and auxilliary spring remain unchanged to the synthetic pretightning force that pallet produces basically in the moving process of pallet, promptly keep 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 symmetric arrangement.
When country rock deformed, pallet can outwards move along the pull bar on-load and let pressures, and discharging stress, and pallet moves at on-load and can keep constant force when letting pressure.After the country rock release was accomplished, pallet is the travelling backwards reinforcement under the effect of main spring and auxilliary spring, realized the second consolidation to country rock.Because stress disturbance when deforming repeatedly, pallet on-load once more moves outward to let and presses and travelling backwards, forms " letting-Zhi-let " circulation supporting and the flexible support to country rock at country rock.The present invention designs ingenious, compact conformation, and the pallet shift motion is big, has not only solved the problem that existing anchor pole can not adapt to dynamic pressure soft-rock tunnel aximal deformation value, and except that anchor bar body, recycles after all detachable, practices thrift cost.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of pallet.
Among Fig. 1: 1 anchor bar body; 2 pallets; 3 pull bars; 4 pretensions are regulated bolt; 5 main springs; 6 bearing pins; 7 cuitellate cams; 8 auxilliary springs; 9 anchorage head frameworks; 10 rollers; 11 turning rollss; 12 nuts; 13 anchoring agent.
Among 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 purpose and effect and be easy to understand and understand, below in conjunction with specific embodiment and diagram, further set forth the present invention.
As shown in Figure 1; A kind of dynamic pressure soft-rock tunnel is regulated bolt 4, main spring 5, bearing pin 6, cuitellate cam 7, auxilliary spring 8, anchorage head framework 9, roller 10, turning rolls 11 and nut 12 by anchor bar body 1, pallet 2, pull bar 3, pretension and is formed with scalable constant force pressure-relieving achor bar.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 and pull bar 3 are connected through screw thread; Pallet 2 is enclosed within on the pull bar 3, and is connected with anchorage head framework 9 through 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 the pull bar 3, and between turning rolls 11 and pallet 2; The axis of two cuitellate cam 7 relative pull bars 3 is symmetric arrangement, and an end of cuitellate cam 7 is connected with anchorage head framework 9 through 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 auxilliary spring 8 is fixed on the anchorage head framework 9, and its other end is connected with cuitellate cam 7, and the axis of two auxilliary spring 8 relative pull bars 3 is symmetric arrangement; Roller 10 is installed on the turning rolls 11, and the axis of two roller 10 relative pull bars 3 is symmetric arrangement.Pallet 2 can move along pull bar 3 under external force, and roller 10 rolls along the outline of cuitellate cam 7 simultaneously, and main spring 5 remains unchanged with the synthetic pretightning force that 8 pairs of pallets of auxilliary spring 2 produce basically in the moving process of pallet 2, promptly 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 symmetric arrangement.
During use; In boring good anchor hole, inject anchoring agent 13 earlier; Insert anchor bar body 1 then rapidly; On near the country rock the afterbody of anchor bar body 1, hang up anchor net (or anchor cable), the pallet 2 that will install pretension adjusting bolt 4 again is enclosed within on the pull bar 3, and then the head with pull bar 3 is connected through screw thread with the afterbody of anchor bar body 1.After anchoring agent 13 solidifies, require adjusting nut 12 and then the pretightning force of regulating anchor pole according to actual condition.
When the country rock of dynamic pressure soft-rock tunnel deformed, anchor bar body 1 was drawn with pallet 2.Form an integral body owing to the effect of the anchored force between anchor bar body 1 and the rock mass with rock mass; Pallet 2 is just letting pressure along with outwards moving along pull bar 3 on-loads under surrouding rock deformation and its action of pulling stress that is produced; Discharging stress, and pallet 2 moves to let at on-load and can keep constant force when pressing.After the country rock release was accomplished, pallet 2 travelling backwards reinforcement under the effect of main spring 5 and auxilliary spring 8 realized the second consolidation to country rock.Because stress disturbance when deforming repeatedly, pallet on-load once more moves outward to let and presses and travelling backwards, forms " letting-Zhi-let " circulation supporting and the flexible support to country rock at country rock.The present invention designs ingenious, compact conformation, and the pallet shift motion is big, except that anchor bar body, recycles after all detachable, practices thrift cost.
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 describes in the foregoing description and the manual just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (2)
1. a dynamic pressure soft-rock tunnel is with scalable constant force pressure-relieving achor bar; Regulating bolt, main spring, bearing pin, cuitellate cam, auxilliary spring, anchorage head framework, roller, turning rolls and nut by anchor bar body, pallet, pull bar, pretension forms; 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 through screw thread with pull bar; Tray sleeve and is regulated bolt and nut is connected with the anchorage head framework through pretension on pull bar; Turning rolls is fixed on the afterbody of pull bar, and main spring is enclosed within on the pull bar, and between turning rolls and pallet; The axis of two relative pull bars of cuitellate cam is symmetric arrangement, and an end of cuitellate cam is connected with the anchorage head framework through bearing pin, and can rotate around bearing pin, and the other end and the roller of cuitellate cam remain contact condition; One end of auxilliary spring is fixed on the anchorage head framework, and its other end is connected with cuitellate cam, and the axis of two relative pull bars of auxilliary spring is symmetric arrangement; Roller is installed on the turning rolls, and the axis of two relative pull bars of roller is symmetric arrangement.
2. a kind of dynamic pressure soft-rock tunnel according to claim 1 is characterized in that with scalable constant force pressure-relieving achor bar: described pallet is provided with a centre bore and two bolts hole, and the axis of two relative centre bores of bolt hole is symmetric arrangement.
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 |
|---|---|---|---|
| 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 true CN102536283A (en) | 2012-07-04 |
| CN102536283B 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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Cited By (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 |
| CN107083980A (en) * | 2017-06-15 | 2017-08-22 | 湖南科技大学 | The country rock disaster alarm method and anchoring prior-warning device of a kind of roadway supported by bolt |
| CN107421588A (en) * | 2017-08-25 | 2017-12-01 | 吉林建筑大学 | Optical fiber grating sensing safety monitoring system in mine using novel anchor rod as sensing media |
| CN109798141A (en) * | 2019-01-25 | 2019-05-24 | 武汉科技大学 | A kind of inclined-plane anchor rod pallet board of adjustable angle |
| 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 |
| CN113294187A (en) * | 2021-05-24 | 2021-08-24 | 上海应用技术大学 | Telescopic anchor rod and construction method thereof |
| CN115520742A (en) * | 2022-10-27 | 2022-12-27 | 中国城市建设研究院有限公司 | Constant force device, connecting equipment and building |
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| 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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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Cited By (12)
| 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 |
| CN107083980A (en) * | 2017-06-15 | 2017-08-22 | 湖南科技大学 | The country rock disaster alarm method and anchoring prior-warning device of a kind of roadway supported by bolt |
| 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 |
| CN107421588A (en) * | 2017-08-25 | 2017-12-01 | 吉林建筑大学 | Optical fiber grating sensing safety monitoring system in mine using novel anchor rod as sensing media |
| 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 |
| CN109798141A (en) * | 2019-01-25 | 2019-05-24 | 武汉科技大学 | A kind of inclined-plane anchor rod pallet board of adjustable angle |
| 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 |
| CN113294187A (en) * | 2021-05-24 | 2021-08-24 | 上海应用技术大学 | Telescopic anchor rod and construction method thereof |
| CN113294187B (en) * | 2021-05-24 | 2023-08-04 | 上海应用技术大学 | Telescopic anchor rod and construction method thereof |
| CN115520742A (en) * | 2022-10-27 | 2022-12-27 | 中国城市建设研究院有限公司 | Constant force device, connecting equipment and building |
| CN115520742B (en) * | 2022-10-27 | 2023-08-18 | 中国城市建设研究院有限公司 | Building |
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| CN102536283B (en) | 2014-03-05 |
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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 |