CN102721494B - Anchor rod forcemeter for testing underground engineering model - Google Patents
Anchor rod forcemeter for testing underground engineering model Download PDFInfo
- Publication number
- CN102721494B CN102721494B CN201210223232.4A CN201210223232A CN102721494B CN 102721494 B CN102721494 B CN 102721494B CN 201210223232 A CN201210223232 A CN 201210223232A CN 102721494 B CN102721494 B CN 102721494B
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- cylindric
- fiber
- compo pipe
- strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
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, particularly relate to a kind of underground project model test anchor ergometer.
Background technology
Geomechanical model test according to similarity theory, Practical Project is converted to indoor model to carry out test simulation, it is conducive to outstanding principal contradiction in the process of the test of complexity, be convenient to the inner link holding, find phenomenon, wherein, underground project model test carries out analogue simulation to the underground works such as tunnel, coal road, instructs a kind of effective ways and the means of underground engineering design and construction.In underground project model test, after cavern excavation, need the supporting of simulating cavern as simulation bolt supporting, at present, in model test, the analogue technique of anchor pole is tending towards ripe gradually, but effective means is lacked for the load-bearing monitor of anchor pole, is difficult to carry out deep analysis to the supporting situation of bolt supporting component in model test construction simulation process.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of underground project model test anchor ergometer, this dynamometer structure is simple, easy to use, to solve the load-bearing monitor problem of anchor pole in model test.
For achieving the above object, the present invention adopts following technical proposals:
A kind of underground project model test anchor ergometer, comprise the cylindric compo pipe between two pallets, two pallets, cylindric compo pipe tube wall there are two boltholes that anchor pole is passed perpendicularly through, the tube wall of cylindric compo pipe is fixed with fiber Bragg grating strain sensor, and fiber Bragg grating strain sensor receives fiber grating data acquisition system (DAS) by optical fiber.
Described fiber Bragg grating strain sensor is located on the outer tube wall between cylindric compo pipe two boltholes, and it scribbles protective rubber.
Described pallet is plane pallet.
Described cylindric compo pipe according to the stressed size of anchor pole in model test than material selection, and when selected metal material can ensure that dynamometer uses compo pipe distortion do not exceed elastic stage.
The using method of above-mentioned underground project model test anchor ergometer, comprises step as follows:
(1) demarcation draws relation curve: bolthole anchor pole being inserted underground project model test anchor ergometer, two pallets contact with cylindric compo pipe, anchor pole lower end is inserted in the circular hole of the steel platform of band circular hole, fiber Bragg grating strain sensor is received in fiber grating data acquisition system (DAS) by optical fiber, make anchor pole lower end by a certain size pulling force and progressively increase, obtain the corresponding strain value of fiber Bragg grating strain sensor by the measurement of fiber grating data acquisition system (DAS) simultaneously, finally obtain the relation curve of rockbolt stress-dynamometer strain;
(2) practical measurement: the anchor pole of the underground project model test anchor ergometer assembled is squeezed in model to be measured, one of them pallet contacts with model surface to be measured, another pallet is fixed by nut, cylindric compo pipe is squeezed and produces strain, obtain its strain value by fiber grating data acquisition system (DAS), then contrast is demarcated rockbolt stress-dynamometer strain curve of obtaining thus obtains rockbolt stress.
Pulling force suffered by anchor pole controls within the specific limits, ensures that the distortion of dynamometer alloy pipe does not exceed elastic stage;
The invention solves the problem of rockbolt stress monitoring in model test, have the following advantages:
(1) make simply, cost is low, can meet the requirement that model test batch production uses;
(2) easy to use, measuring accuracy is high, really can carry out survey test to the stressed change of anchor pole in model test process;
(3) the present invention can be widely used in the geomechanical model test research of the underground engineering field such as water conservancy, traffic, mine.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is the side view of Fig. 1.
Schematic diagram when Fig. 3 is rating test of the present invention.
Fig. 4 is use schematic diagram of the present invention;
Wherein: 1, cylindric compo pipe; 2, fiber Bragg grating strain sensor; 3, optical fiber; 4, protective rubber; 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 described in further details.
A kind of underground project model test anchor ergometer, comprise two pallets 7, a cylindrical section shape compo pipe 1 is provided with between two pallets 7, cylindric compo pipe 1 tube wall there are two boltholes 5 that anchor pole 6 is passed perpendicularly through, the tube wall of cylindric compo pipe 1 is fixed with fiber Bragg grating strain sensor 2, and fiber Bragg grating strain sensor 2 receives fiber grating data acquisition system (DAS) 9 by optical fiber 3.
Fiber Bragg grating strain sensor 2 is located on the outer tube wall between cylindric compo pipe 1 two boltholes 5, and it scribbles protective rubber 4.Pallet 7 is plane pallet.Cylindric compo pipe 1 is according to the stressed size of anchor pole in model test than material selection, and when selected metal material can ensure that dynamometer uses, compo pipe is out of shape and does not exceed elastic stage.
The using method of above-mentioned underground project model test anchor ergometer, comprises step as follows:
(1) demarcation draws relation curve: inserted anchor pole 6 lower end of underground project model test anchor ergometer in the circular hole 11 of the steel platform 10 of band circular hole 11, two pallets 7 contact with cylindric compo pipe 1, fiber Bragg grating strain sensor 2 is received in fiber grating data acquisition system (DAS) 9 by optical fiber 3, make anchor pole 6 lower end by a certain size pulling force and progressively increase, measured by fiber grating data acquisition system (DAS) 9 simultaneously and obtain the corresponding strain value of fiber Bragg grating strain sensor 2, finally obtain the relation curve of rockbolt stress-dynamometer strain;
(2) practical measurement: the anchor pole 6 of the underground project model test anchor ergometer assembled is squeezed in model 12 to be measured, one of them pallet 7 and model 12 surface contact to be measured, another pallet 7 is fixed by nut 8, cylindric compo pipe 1 is squeezed and produces strain, obtain its strain value by fiber grating data acquisition system (DAS) 9, then contrast is demarcated rockbolt stress-dynamometer strain curve of obtaining thus obtains rockbolt stress.
As known by the technical knowledge, the present invention can be realized by other the embodiment not departing from its Spirit Essence or essential feature.Therefore, with regard to each side, all just illustrating, is not only.Within the scope of the present invention all or be all included in the invention being equal to the change in scope of the present invention.
Claims (1)
1. the using method of a underground project model test anchor ergometer, it is characterized in that, dynamometer comprises the cylindric compo pipe between two pallets, two pallets, cylindric compo pipe tube wall there are two boltholes that anchor pole is passed perpendicularly through, the tube wall of cylindric compo pipe is fixed with fiber Bragg grating strain sensor, and fiber Bragg grating strain sensor receives fiber grating data acquisition system (DAS) by optical fiber;
Described fiber Bragg grating strain sensor is located on the outer tube wall between cylindric compo pipe two boltholes, and it scribbles protective rubber;
Described pallet is plane pallet; Comprise step as follows:
(1) demarcation draws relation curve: bolthole anchor pole being inserted underground project model test anchor ergometer, two pallets contact with cylindric compo pipe, anchor pole lower end is inserted in the circular hole of the steel platform of band circular hole, fiber Bragg grating strain sensor is received in fiber grating data acquisition system (DAS) by optical fiber, make anchor pole lower end by a certain size pulling force and progressively increase, obtain the corresponding strain value of fiber Bragg grating strain sensor by the measurement of fiber grating data acquisition system (DAS) simultaneously, finally obtain the relation curve of rockbolt stress-dynamometer strain;
(2) practical measurement: the anchor pole of the underground project model test anchor ergometer assembled is squeezed in model to be measured, one of them pallet contacts with model surface to be measured, another pallet is fixed by nut, cylindric compo pipe is squeezed and produces strain, obtain its strain value by fiber grating data acquisition system (DAS), then contrast is demarcated rockbolt stress-dynamometer strain curve of obtaining thus obtains rockbolt stress.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102721494A CN102721494A (en) | 2012-10-10 |
| CN102721494B true CN102721494B (en) | 2015-04-22 |
Family
ID=46947319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210223232.4A Expired - Fee Related CN102721494B (en) | 2012-06-29 | 2012-06-29 | Anchor rod forcemeter for testing underground engineering model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721494B (en) |
Citations (6)
| 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 |
| CN202693169U (en) * | 2012-06-29 | 2013-01-23 | 山东大学 | Rock bolt extensometer for underground engineering model test |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2696782C (en) * | 2007-09-06 | 2016-11-15 | Shell Internationale Research Maatschappij B.V. | High spatial resolution distributed temperature sensing system |
-
2012
- 2012-06-29 CN CN201210223232.4A patent/CN102721494B/en not_active Expired - Fee Related
Patent Citations (6)
| 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102721494A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102183410B (en) | Brazilian split method for measuring elastic parameter of rock under extension condition | |
| CN205120490U (en) | Geotechnique's type test piece tensile test load anchor clamps | |
| CN106767668B (en) | Device and method for measuring pressure bearing and deformation of roadway roof | |
| CN106289711B (en) | A kind of force test in wind tunnel method suitable for lattice round steel pipe power transmission tower | |
| CN104034585B (en) | A kind of method measuring anchoring property | |
| CN101344382B (en) | Flexible transmission type built-in miniature multi-point displacement test system used for model experiment | |
| CN103499268A (en) | Space relative deformation measuring device for upper disc and lower disc of in-situ rock joint plane | |
| CN102720515A (en) | Fiber bragg grating prestress measurement anchor rod and application method thereof | |
| CN105258664A (en) | Power transmission line equivalence icing thickness acquisition method | |
| CN103217282A (en) | Fatigue test method of blade scaling model of horizontal axis wind turbine based on equal-service-life principle | |
| CN109211390B (en) | Safety test and evaluation method for vibration and strength of power transmission tower | |
| CN104167076A (en) | Ice-coated electric transmission line weak link early warning method | |
| CN202075181U (en) | Anchor bolt strength testing device | |
| CN102680151B (en) | Anchor rod torque testing device and method | |
| CN109733641A (en) | A kind of aircraft full size structure part multiaxle fatigue experimental method | |
| CN205138791U (en) | Gas turbine engine axial force test sensor confined state detection device | |
| CN203310698U (en) | Coal mine tunnel coal-rock mass anchoring performance testing device | |
| CN202693170U (en) | Fiber Bragg grating pre-stressed force-measuring rock bolt | |
| CN102706492A (en) | Anchor rod dynamometer and dynamometry method for underground engineering model experiment | |
| CN202693169U (en) | Rock bolt extensometer for underground engineering model test | |
| CN102721494B (en) | Anchor rod forcemeter for testing underground engineering model | |
| CN202693167U (en) | Rock bolt extensometer for underground engineering model test | |
| CN103104272B (en) | Lossless dynamic detection device of anchor stock preload and detection method thereof | |
| CN202693419U (en) | Multi-load coupling rock breaking device | |
| CN108981814B (en) | Device and method for monitoring real-time parameters of roadway surrounding rock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20210629 |