CN102721494A - Anchor rod forcemeter for testing underground engineering model - Google Patents
Anchor rod forcemeter for testing underground engineering model Download PDFInfo
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- CN102721494A CN102721494A CN2012102232324A CN201210223232A CN102721494A CN 102721494 A CN102721494 A CN 102721494A CN 2012102232324 A CN2012102232324 A CN 2012102232324A CN 201210223232 A CN201210223232 A CN 201210223232A CN 102721494 A CN102721494 A CN 102721494A
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- anchor rod
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Abstract
The invention relates to an anchor rod forcemeter for testing an underground engineering model. The anchor rod forcemeter comprises two trays and a cylindrical alloy pipe arranged between the two trays, wherein two anchor rod holes for enabling an anchor rod to penetrate through vertically are formed in the pipe wall of the cylindrical alloy pipe, an optical fiber grating strain sensor is fixedly arranged on the pipe wall of the cylindrical alloy pipe, and the optical fiber grating strain sensor is connected to an optical fiber grating data acquisition system through an optical fiber. When in use, the anchor rod is inserted into the anchor rod holes of the anchor rod forcemeter for testing the underground engineering model, the two trays are in contact with the cylindrical alloy pipe, external force is firstly applied for measuring an external force-strain curve, then the anchor rod is further driven into the model to be tested for measuring the actual strain, and the stress of the anchor rod is further obtained by comparing with the curve. The anchor rod forcemeter disclosed by the invention has the advantages of simple structure and convenience in use.
Description
Technical field
The present invention relates to a kind of anchor ergometer, relate in particular to a kind of underground project model test and use anchor ergometer.
Background technology
Geomechanical model test is to convert actual engineering into the indoor model simulation that makes an experiment according to similarity theory; It helps outstanding principal contradiction in the process of the test of complicacy; Be convenient to hold, find the inner link of phenomenon; Wherein, underground project model test is that underground workss such as tunnel, coal road are carried out analogue simulation, instructs a kind of effective ways and the means of underground works design and construction.In underground project model test; Behind the cavern excavation; The supporting that needs the simulation cavern is like the simulation bolt supporting, and at present, the analogue technique of anchor pole is tending towards ripe gradually in the model test; But the stressed monitoring for anchor pole lacks effective means, is difficult to the supporting situation of bolt supporting member in the model test construction simulation process is carried out deep analysis.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned prior art, provide a kind of underground project model test to use anchor ergometer, this dynamometer is simple in structure, easy to use, to solve the stressed monitoring problem of anchor pole in the model test.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of underground project model test is used anchor ergometer; Comprise the cylindric compo pipe between two pallets, two pallets; Two boltholes that anchor pole is vertically passed are arranged on the cylindric compo pipe tube wall; Be fixed with fiber Bragg grating strain sensor on the tube wall of cylindric compo pipe, fiber Bragg grating strain sensor is received the fiber grating data acquisition system (DAS) through optical fiber.
Described fiber Bragg grating strain sensor is located on the outer tube wall between two boltholes of cylindric compo pipe, and scribbles protection glue on it.
Described pallet is the plane pallet.
Said cylindric compo pipe according to the stressed size of anchor pole in the model test than selection material, and selected metal material can guarantee that dynamometer uses the time compo pipe distortion do not exceed elastic stage.
Above-mentioned underground project model test comprises that with the method for application of anchor ergometer step is following:
(1) demarcation draws relation curve: anchor pole is inserted the bolthole of underground project model test with anchor ergometer; Two pallets contact with cylindric compo pipe; Insert in the circular hole of the steel platform of being with circular hole the anchor pole lower end; Fiber Bragg grating strain sensor is received on the fiber grating data acquisition system (DAS) through optical fiber; Make the anchor pole lower end receive a certain size pulling force and progressively increase, measure the corresponding strain value of fiber Bragg grating strain sensor through the fiber grating data acquisition system (DAS) simultaneously, finally obtain anchor pole stressed-relation curve of dynamometer strain;
(2) practical measurement: the underground project model test that will assemble is squeezed in the model to be measured with the anchor pole of anchor ergometer; One of them pallet contacts with model surface to be measured; Another pallet is fixed through nut; The generation strain that is squeezed of cylindric compo pipe obtains its strain value through the fiber grating data acquisition system (DAS), thus again contrast demarcate the anchor pole that obtains stressed-that the dynamometer strain curve obtains anchor pole is stressed.
The suffered pulling force control of anchor pole guarantees that the distortion of dynamometer alloy pipe does not exceed elastic stage within the specific limits;
The invention solves the stressed problems of monitoring of anchor pole in the model test, have the following advantages:
(1) make simply, cost is low, can satisfy model test and produce the requirement of using in batches;
(2) easy to use, measuring accuracy is high, can really survey test to the stressed variation of anchor pole in the model test process;
(3) the present invention can be widely used in the geomechanical model test research of underground engineering field such as water conservancy, traffic, mine.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is the side view of Fig. 1.
The synoptic diagram of Fig. 3 during for rating test of the present invention.
Fig. 4 is a use synoptic diagram of the present invention;
Wherein: 1, cylindric compo pipe; 2, fiber Bragg grating strain sensor; 3, optical fiber; 4, protection glue; 5, bolthole; 6, anchor pole; 7, pallet; 8, nut; 9, fiber grating data acquisition system (DAS); 10, steel platform; 11, circular hole; 12, model to be measured.
Embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
A kind of underground project model test is used anchor ergometer; Comprise two pallets 7; Two 7 on pallets are provided with a cylindrical section shape compo pipe 1; Have two boltholes 5 that anchor pole 6 is vertically passed on cylindric compo pipe 1 tube wall, be fixed with fiber Bragg grating strain sensor 2 on the tube wall of cylindric compo pipe 1, fiber Bragg grating strain sensor 2 is received fiber grating data acquisition system (DAS) 9 through optical fiber 3.
Fiber Bragg grating strain sensor 2 is located on the outer tube wall between 1 two boltholes 5 of cylindric compo pipe, and scribbles protection glue 4 on it.Pallet 7 is the plane pallet.Cylindric compo pipe 1 according to the stressed size of anchor pole in the model test than selection material, and selected metal material can guarantee that dynamometer uses the time compo pipe distortion do not exceed elastic stage.
Above-mentioned underground project model test comprises that with the method for application of anchor ergometer step is following:
(1) demarcation draws relation curve: underground project model test is inserted in the circular hole 11 of the steel platform 10 of being with circular hole 11 with anchor pole 6 lower ends of anchor ergometer; Two pallets 7 contact with cylindric compo pipe 1; Fiber Bragg grating strain sensor 2 is received on the fiber grating data acquisition system (DAS) 9 through optical fiber 3; Make anchor pole 6 lower ends receive a certain size pulling force and progressively increase; Measure fiber Bragg grating strain sensor 2 corresponding strain values through fiber grating data acquisition system (DAS) 9 simultaneously, finally obtain anchor pole stressed-relation curve of dynamometer strain;
(2) practical measurement: the underground project model test that will assemble is squeezed in the model 12 to be measured with the anchor pole 6 of anchor ergometer; One of them pallet 7 contacts with model to be measured 12 surfaces; Another pallet 7 is fixing through nut 8; The generation strain that is squeezed of cylindric compo pipe 1 obtains its strain value through fiber grating data acquisition system (DAS) 9, thus again contrast demarcate the anchor pole that obtains stressed-that the dynamometer strain curve obtains anchor pole is stressed.
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 (4)
1. a underground project model test is used anchor ergometer; Comprise the cylindric compo pipe between two pallets, two pallets; Two boltholes that anchor pole is vertically passed are arranged on the cylindric compo pipe tube wall; Be fixed with fiber Bragg grating strain sensor on the tube wall of cylindric compo pipe, fiber Bragg grating strain sensor is received the fiber grating data acquisition system (DAS) through optical fiber.
2. underground project model test according to claim 1 is used anchor ergometer, it is characterized in that, described fiber Bragg grating strain sensor is located on the outer tube wall between two boltholes of cylindric compo pipe, and scribbles protection glue on it.
3. underground project model test according to claim 1 is used anchor ergometer, it is characterized in that, described pallet is the plane pallet.
4. the described underground project model test of claim 1 is characterized in that with the method for application of anchor ergometer, comprises that step is following:
(1) demarcation draws relation curve: anchor pole is inserted the bolthole of underground project model test with anchor ergometer; Two pallets contact with cylindric compo pipe; Insert in the circular hole of the steel platform of being with circular hole the anchor pole lower end; Fiber Bragg grating strain sensor is received on the fiber grating data acquisition system (DAS) through optical fiber; Make the anchor pole lower end receive a certain size pulling force and progressively increase, measure the corresponding strain value of fiber Bragg grating strain sensor through the fiber grating data acquisition system (DAS) simultaneously, finally obtain anchor pole stressed-relation curve of dynamometer strain;
(2) practical measurement: the underground project model test that will assemble is squeezed in the model to be measured with the anchor pole of anchor ergometer; One of them pallet contacts with model surface to be measured; Another pallet is fixed through nut; The generation strain that is squeezed of cylindric compo pipe obtains its strain value through the fiber grating data acquisition system (DAS), thus again contrast demarcate the anchor pole that obtains stressed-that the dynamometer strain curve obtains anchor pole is stressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210223232.4A CN102721494B (en) | 2012-06-29 | 2012-06-29 | Anchor rod forcemeter for testing underground engineering model |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210223232.4A CN102721494B (en) | 2012-06-29 | 2012-06-29 | Anchor rod forcemeter for testing underground engineering model |
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| CN102721494A true CN102721494A (en) | 2012-10-10 |
| CN102721494B CN102721494B (en) | 2015-04-22 |
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| CN201210223232.4A Expired - Fee Related CN102721494B (en) | 2012-06-29 | 2012-06-29 | Anchor rod forcemeter for testing underground engineering model |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864202A1 (en) * | 2003-12-22 | 2005-06-24 | Commissariat Energie Atomique | Instrumented tubular device for transporting fluid under pressure, using Bragg network optical gauges to monitor temperature, pressure and pressure fluctuations and thus cumulative fatigue |
| CN101358886A (en) * | 2008-09-25 | 2009-02-04 | 西安科技大学 | Grating anchor rod force-measuring device and method for monitoring anchor rod stress variation |
| CN101397904A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring downhole casing strain by using optical fibre sensor |
| ES2329752A1 (en) * | 2008-05-29 | 2009-11-30 | Universidad Politecnica De Valencia | Optical sensor for structural monitoring |
| CN101793573A (en) * | 2010-03-26 | 2010-08-04 | 昆明理工大学 | FBG on-line monitoring method of pressure pipeline |
| US20100254650A1 (en) * | 2007-09-06 | 2010-10-07 | Frederick Henry Kreisler Rambow | High spatial resolution distributed temperature sensing system |
| CN202693169U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Rock bolt extensometer for underground engineering model test |
-
2012
- 2012-06-29 CN CN201210223232.4A patent/CN102721494B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864202A1 (en) * | 2003-12-22 | 2005-06-24 | Commissariat Energie Atomique | Instrumented tubular device for transporting fluid under pressure, using Bragg network optical gauges to monitor temperature, pressure and pressure fluctuations and thus cumulative fatigue |
| US20100254650A1 (en) * | 2007-09-06 | 2010-10-07 | Frederick Henry Kreisler Rambow | High spatial resolution distributed temperature sensing system |
| ES2329752A1 (en) * | 2008-05-29 | 2009-11-30 | Universidad Politecnica De Valencia | Optical sensor for structural monitoring |
| CN101358886A (en) * | 2008-09-25 | 2009-02-04 | 西安科技大学 | Grating anchor rod force-measuring device and method for monitoring anchor rod stress variation |
| CN101397904A (en) * | 2008-11-05 | 2009-04-01 | 大庆油田有限责任公司 | Method for monitoring downhole casing strain by using optical fibre sensor |
| CN101793573A (en) * | 2010-03-26 | 2010-08-04 | 昆明理工大学 | FBG on-line monitoring method of pressure pipeline |
| CN202693169U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Rock bolt extensometer for underground engineering model test |
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| CN102721494B (en) | 2015-04-22 |
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