CN102720515A - Fiber bragg grating prestress measurement anchor rod and application method thereof - Google Patents
Fiber bragg grating prestress measurement anchor rod and application method thereof Download PDFInfo
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- CN102720515A CN102720515A CN2012102228047A CN201210222804A CN102720515A CN 102720515 A CN102720515 A CN 102720515A CN 2012102228047 A CN2012102228047 A CN 2012102228047A CN 201210222804 A CN201210222804 A CN 201210222804A CN 102720515 A CN102720515 A CN 102720515A
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- fiber
- bragg grating
- anchor rod
- fiber bragg
- test interface
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
Abstract
The invention relates to a fiber bragg grating prestress measurement anchor rod and an application method thereof. The fiber bragg grating prestress measurement anchor rod comprises an anchor rod body, a tray and a nut, wherein a test interface is arranged on a tip of an end, which is provided with the nut, of the anchor rod body, a longitudinal groove which penetrates through the whole rod body is respectively arranged on two sides of the anchor rod body, a plurality of fiber bragg grating strain sensors are arranged in each of the grooves, and fiber bragg grating strain sensors are connected with the test interface through optical fibers. The test interface is connected with a fiber bragg grating data acquisition system, the anchor rod body is installed inside a drilling hole and is fixed in a rock mass through an anchoring agent, then the nut is rotated to prestress the anchor rod body to a design value, strain change values of fiber bragg grating sensors during construction are obtained through the data acquisition system, and finally load changes of the anchor rod body during construction are obtained according to laboratory calibration results. The anchor rod is simple in structure, simple to install and easy to operate, and sensors are high in anti-jamming capability, high in measurement precision, safe and reliable.
Description
Technical field
The present invention relates to a kind of device for measuring force, particularly a kind of fiber grating prestressing force force-measuring anchor stock and method for using thereof are used for isolith geotechnique journey field, mine.
Background technology
Force-measuring anchor stock is a kind of engineering device for measuring force of developing in order to study problem such as the mechanism of action and the stressing conditions of anchor pole in coal roadway support, slope reinforcement, tunnel support isolith geotechnique journey; At present; Force-measuring anchor stock mainly contains resistance-strain type and steel chord type, and wherein, the resistance-strain type of dynamometer anchor pole is used comparatively extensive; But the antijamming capability of the sensor of its use is not strong, stability is not high, and sensitivity is low, certainty of measurement is not high.Fiber grating sensing technology is a kind of brand-new sensing technology that emerges along with the development of fiber grating manufacturing technology; Its sensor has advantages such as anti-electromagnetic interference, anticorrosive, electric insulation, high sensitivity; And high temperature resistant, high pressure, safe and reliable, have broad application prospects.Fiber grating sensing technology does not have the application precedent as yet at the force-measuring anchor stock technical elements at present.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, a kind of fiber grating prestressing force force-measuring anchor stock and method for using thereof are provided, this anchor pole antijamming capability is strong, certainty of measurement is high, can apply prestressing force safely and reliably.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
Fiber grating prestressing force force-measuring anchor stock; Comprise anchor pole, pallet, nut; The termination of one end of anchor pole band nut is provided with test interface; The anchor pole both sides are respectively equipped with the longitudinal fluting that runs through the whole body of rod together, are provided with a plurality of fiber Bragg grating strain sensors in the per pass groove, and fiber Bragg grating strain sensor connects test interface through optical fiber.
Described fiber Bragg grating strain sensor is evenly distributed in the longitudinal fluting of anchor rod body, and the corresponding test interface of each fiber Bragg grating strain sensor.
Described test interface is fixed in the containment vessel, and containment vessel is welded on the anchor pole.
On the described containment vessel end cap is arranged.
Described test interface is connected with the fiber grating data collecting system through optical fiber.
It is threaded that described anchor pole is equipped with the shank portion of nut and pallet.
The anchor pole model is selected according to the engineering actual conditions, and used anchor pole model is consistent in itself and the engineering.
The method for using of fiber grating prestressing force force-measuring anchor stock is: test interface is connected with the fiber grating data collecting system; Anchor pole is installed in the boring and through the anchoring agent and is fixed in the rock mass; Rotating nut applies prestressing force to design load to anchor pole then; Obtain the strain variation value of fiber-optic grating sensor in the work progress through data collecting system,, finally obtain the magnitude of load of anchor pole in work progress and change again according to the laboratory calibration result.
The present invention has the following advantages:
(1) simple in structure, simple installation, and easy operating;
(2) the sensor antijamming capability is strong, certainty of measurement is high, safe and reliable, can under conditions such as high temperature, high pressure, work;
(3) can be widely used in underground engineering field such as water conservancy, traffic, mine.
Description of drawings
Fig. 1 is the overall structure sketch map of fiber grating prestressing force force-measuring anchor stock of the present invention;
Fig. 2 is the use sketch map of fiber grating prestressing force force-measuring anchor stock of the present invention;
Wherein: 1-anchor pole; 2-nut; 3-pallet; 4-fiber Bragg grating strain sensor; 5-optical fiber; 6-test interface; 7-containment vessel; 8-end cap; 9-fiber grating data collecting system; 10-anchoring agent; 11-boring.
The specific embodiment
Embodiment below in conjunction with in the accompanying drawing explains further details to the present invention.
Like accompanying drawing 1; Fiber grating prestressing force force-measuring anchor stock; Comprise anchor pole 1, pallet 3, nut 2, the termination of an end of anchor pole 1 band nut 2 is provided with test interface 6, and anchor pole 1 both sides are respectively equipped with the longitudinal fluting that runs through the whole body of rod together; Be provided with a plurality of fiber Bragg grating strain sensors 4 in the per pass groove, fiber Bragg grating strain sensor 4 connects test interface 6 through optical fiber 5.
Described fiber Bragg grating strain sensor is evenly distributed in the longitudinal fluting of anchor rod body, and the corresponding test interface of each fiber Bragg grating strain sensor.Test interface 6 is fixed in the containment vessel 7, and containment vessel 7 is welded on the anchor pole 1, and end cap 8 is arranged on the containment vessel 7, and test interface 6 is connected with fiber grating data collecting system 9 through optical fiber 5.It is threaded that anchor pole 1 is equipped with the shank portion of nut 2 and pallet 3.
Like accompanying drawing 2; When the present invention used, test interface 6 was connected with fiber grating data collecting system 9, and anchor pole 1 is installed in the boring 11 and through anchoring agent 10 and is fixed in the rock mass; 2 pairs of anchor poles 1 of rotating nut apply prestressing force to design load then; Obtain the strain variation value of fiber Bragg grating strain sensor 4 in the work progress through fiber grating data collecting system 9,, finally obtain the magnitude of load of force-measuring anchor stock in work progress and change again according to the laboratory calibration result.
Can know that by technological general knowledge the present invention can realize through other the embodiment that does not break away from its spirit or essential feature.Therefore, with regard to each side, all just illustrating, is not only.All within the scope of the present invention or the change in being equal to scope of the present invention all comprised by the present invention.
Claims (6)
1. fiber grating prestressing force force-measuring anchor stock; Comprise anchor pole, pallet, nut; It is characterized in that the termination of an end of anchor pole band nut is provided with test interface, the anchor pole both sides are respectively equipped with the longitudinal fluting that runs through the whole body of rod together; Be provided with a plurality of fiber Bragg grating strain sensors in the per pass groove, fiber Bragg grating strain sensor connects test interface through optical fiber.
2. fiber grating prestressing force force-measuring anchor stock according to claim 1 is characterized in that described fiber Bragg grating strain sensor is evenly distributed in the longitudinal fluting of anchor rod body, and the corresponding test interface of each fiber Bragg grating strain sensor.
3. fiber grating prestressing force force-measuring anchor stock according to claim 1 is characterized in that described test interface is fixed in the containment vessel, and containment vessel is welded on the anchor pole.
4. fiber grating prestressing force force-measuring anchor stock according to claim 3 is characterized in that on the described containment vessel end cap being arranged.
5. fiber grating prestressing force force-measuring anchor stock according to claim 1 is characterized in that, described test interface is connected with the fiber grating data collecting system through optical fiber.
6. the method for using of the described fiber grating prestressing force of claim 1 force-measuring anchor stock; It is characterized in that test interface is connected with the fiber grating data collecting system, and anchor pole is installed in the boring and through the anchoring agent and is fixed in the rock mass; Rotating nut applies prestressing force to design load to anchor pole then; Obtain the strain variation value of fiber-optic grating sensor in the work progress through data collecting system,, finally obtain the magnitude of load of anchor pole in work progress and change again according to the laboratory calibration result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102228047A CN102720515A (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating prestress measurement anchor rod and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102228047A CN102720515A (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating prestress measurement anchor rod and application method thereof |
Publications (1)
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| CN102720515A true CN102720515A (en) | 2012-10-10 |
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| CN2012102228047A Pending CN102720515A (en) | 2012-06-29 | 2012-06-29 | Fiber bragg grating prestress measurement anchor rod and application method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362552A (en) * | 2013-06-26 | 2013-10-23 | 中国矿业大学 | Distributed optical fiber grating anchor rod group stress monitoring system for coal mine roadway |
| CN103912027A (en) * | 2014-04-24 | 2014-07-09 | 中国科学院武汉岩土力学研究所 | Site anchoring test manufacturing, installing and automatic data collection method |
| CN105240037A (en) * | 2015-10-21 | 2016-01-13 | 浙江工业大学 | Information anchor rod with detecting and alarming functions |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
| CN106441660A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Anchor bolt pad force measuring device |
| CN106677812A (en) * | 2016-12-02 | 2017-05-17 | 大连理工大学 | Fiber grating force measurement anchor rod |
| CN106679856A (en) * | 2016-12-02 | 2017-05-17 | 西南交通大学 | Testing device for stress on base plate of anchor rod |
| CN106703030A (en) * | 2016-11-18 | 2017-05-24 | 苏州市能工基础工程有限责任公司 | Hot-melt anchor head |
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| CN110595606A (en) * | 2019-09-25 | 2019-12-20 | 武汉理工大学 | Device of long-term monitoring hydraulic tunnel lining cutting vibration characteristic |
| WO2020169356A1 (en) * | 2019-02-19 | 2020-08-27 | Montanuniversität Leoben | Rock bolt having sensor for measuring mechanical tension |
| CN112031845A (en) * | 2020-08-07 | 2020-12-04 | 太原理工大学 | Coal rock interface stability measuring device of fiber grating composite construction |
| CN115467345A (en) * | 2022-09-15 | 2022-12-13 | 甘肃省交通规划勘察设计院股份有限公司 | Novel assembled highway side slope anchor structure with stress monitoring function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102999A (en) * | 1996-10-02 | 1998-04-21 | Yasutoshi Suzuki | Ground tightening bolt with function to check driven length |
| EP0934454A1 (en) * | 1996-10-25 | 1999-08-11 | Geoforschungszentrum Potsdam | Anchoring device with strain measurement system |
| DE19913113A1 (en) * | 1999-03-23 | 2000-10-12 | Geso Ges Fuer Sensorik Geotech | Deformation measuring device for anchor bars in mining has fibre grating sensors with fibre windings having twist angles based on compensation conditions for simultaneous linear extension and transversal contraction |
| CN101900532A (en) * | 2009-05-06 | 2010-12-01 | 中山大学 | Perturbation-fiber bragg grating coupling method-based technology for monitoring stability of rock-soil body |
| CN201753610U (en) * | 2009-09-10 | 2011-03-02 | 中国科学院水利部成都山地灾害与环境研究所 | Connecting anchor bolt |
| CN102140796A (en) * | 2010-12-24 | 2011-08-03 | 大连理工大学 | Intelligent fiber reinforced plastic (FRP) anchor rod |
| CN202033138U (en) * | 2010-11-08 | 2011-11-09 | 昆明理工大学 | Fiber Bragg grating distributed anchor pole force cell sensor |
| CN202693170U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Fiber Bragg grating pre-stressed force-measuring rock bolt |
-
2012
- 2012-06-29 CN CN2012102228047A patent/CN102720515A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102999A (en) * | 1996-10-02 | 1998-04-21 | Yasutoshi Suzuki | Ground tightening bolt with function to check driven length |
| EP0934454A1 (en) * | 1996-10-25 | 1999-08-11 | Geoforschungszentrum Potsdam | Anchoring device with strain measurement system |
| EP0934454B1 (en) * | 1996-10-25 | 2001-05-30 | Geoforschungszentrum Potsdam | Anchoring device with strain measurement system |
| DE19913113A1 (en) * | 1999-03-23 | 2000-10-12 | Geso Ges Fuer Sensorik Geotech | Deformation measuring device for anchor bars in mining has fibre grating sensors with fibre windings having twist angles based on compensation conditions for simultaneous linear extension and transversal contraction |
| CN101900532A (en) * | 2009-05-06 | 2010-12-01 | 中山大学 | Perturbation-fiber bragg grating coupling method-based technology for monitoring stability of rock-soil body |
| CN201753610U (en) * | 2009-09-10 | 2011-03-02 | 中国科学院水利部成都山地灾害与环境研究所 | Connecting anchor bolt |
| CN202033138U (en) * | 2010-11-08 | 2011-11-09 | 昆明理工大学 | Fiber Bragg grating distributed anchor pole force cell sensor |
| CN102140796A (en) * | 2010-12-24 | 2011-08-03 | 大连理工大学 | Intelligent fiber reinforced plastic (FRP) anchor rod |
| CN202693170U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Fiber Bragg grating pre-stressed force-measuring rock bolt |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103362552A (en) * | 2013-06-26 | 2013-10-23 | 中国矿业大学 | Distributed optical fiber grating anchor rod group stress monitoring system for coal mine roadway |
| CN103362552B (en) * | 2013-06-26 | 2015-06-10 | 中国矿业大学 | Distributed optical fiber grating anchor rod group stress monitoring system for coal mine roadway |
| CN103912027A (en) * | 2014-04-24 | 2014-07-09 | 中国科学院武汉岩土力学研究所 | Site anchoring test manufacturing, installing and automatic data collection method |
| CN103912027B (en) * | 2014-04-24 | 2015-10-21 | 中国科学院武汉岩土力学研究所 | A kind of fabrication and installation of anchored in situ test and automatic data collection method |
| CN105240037A (en) * | 2015-10-21 | 2016-01-13 | 浙江工业大学 | Information anchor rod with detecting and alarming functions |
| CN106703030B (en) * | 2016-11-18 | 2018-06-05 | 苏州市能工基础工程有限责任公司 | Heat anchor head |
| CN106703030A (en) * | 2016-11-18 | 2017-05-24 | 苏州市能工基础工程有限责任公司 | Hot-melt anchor head |
| WO2018090599A1 (en) * | 2016-11-18 | 2018-05-24 | 苏州市能工基础工程有限责任公司 | Hot-melt anchor head |
| CN106441660A (en) * | 2016-12-02 | 2017-02-22 | 西南交通大学 | Anchor bolt pad force measuring device |
| CN106677812A (en) * | 2016-12-02 | 2017-05-17 | 大连理工大学 | Fiber grating force measurement anchor rod |
| CN106679856A (en) * | 2016-12-02 | 2017-05-17 | 西南交通大学 | Testing device for stress on base plate of anchor rod |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| WO2020169356A1 (en) * | 2019-02-19 | 2020-08-27 | Montanuniversität Leoben | Rock bolt having sensor for measuring mechanical tension |
| US11946375B2 (en) | 2019-02-19 | 2024-04-02 | Montanuniversität Leoben | Rock anchor with sensor for measuring a mechanical tension |
| CN110595606A (en) * | 2019-09-25 | 2019-12-20 | 武汉理工大学 | Device of long-term monitoring hydraulic tunnel lining cutting vibration characteristic |
| CN112031845A (en) * | 2020-08-07 | 2020-12-04 | 太原理工大学 | Coal rock interface stability measuring device of fiber grating composite construction |
| CN115467345A (en) * | 2022-09-15 | 2022-12-13 | 甘肃省交通规划勘察设计院股份有限公司 | Novel assembled highway side slope anchor structure with stress monitoring function |
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Application publication date: 20121010 |