CN104697674A - Anchor rod stress testing device and application method thereof - Google Patents
Anchor rod stress testing device and application method thereof Download PDFInfo
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- CN104697674A CN104697674A CN201510052247.2A CN201510052247A CN104697674A CN 104697674 A CN104697674 A CN 104697674A CN 201510052247 A CN201510052247 A CN 201510052247A CN 104697674 A CN104697674 A CN 104697674A
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- foam metal
- metal plate
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- plate
- anchor pole
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an anchor rod stress testing device. The anchor rod stress testing device is characterized by mainly comprising a foam metal plate, an upper cushion plate, a lower cushion plate, and a space measuring instrument; the foam metal plate is situated between the upper cushion plate and the lower cushion plate, and the foam metal plate, the upper cushion plate and the lower cushion plate are bonded together through binding agent; the foam metal plate is made of foam metal material, and it is a flat plate structure wholly and in the shape of square or circle; the center of the foam metal plate is provided with a circular hole, and the foam metal plate is gradually flattened along with the load that it receives. According to the compression property of the foam metal material, the load measurement is transformed to be the displacement measurement by using the determined relationship between the load that it receives and deformation, and thereby axial force of the anchor rod or the anchor cable is obtained. According to the anchor rod stress testing device, the axial force of the anchor rod is simple and easy to practice, and the measurement cost is greatly reduced.
Description
Technical field
The present invention relates to underground works anchor structure health detection field, specifically a kind of forces testing device for anchor pole or anchor cable and application process thereof.
Background technology
In recent years, anchor pole obtains a wide range of applications in underground engineering support field, has played vital role for reduction support cost and minimizing accident.Because anchor pole is embedded in country rock inside, belong to concealed structure, its Gernral Check-up and support action evaluation comparatively difficult.In order to assess support action and the health status of anchor pole, be generally important evaluation index by the axle masterpiece of anchor pole end outside, but the measurement of anchor axial force is but very difficult.The anchor axial force measuring method adopted both at home and abroad at present mainly comprises: strain measurement method, pressure transducer mensuration and type vibration wire anchor ergometer.
Strain measurement method refers to: before rockbolt installation, in bolt shaft to laying foil gauge or fiber grating, produces certain distortion, can measure the axial strain of anchor pole, according to the axle power of the strain calculation anchor pole recorded after rockbolt stress.The foil gauge adopted in this method and fiber grating very easily damage, and are subject to the impact of external electromagnetic, temperature, require higher to surrounding environment, and measurement result is unstable, and measurement result generally can only be as a reference.In addition, fiber grating strain measuring system cost is higher.
Pressure transducer mensuration refers to: install a piezoelectric transducer at anchor rod pallet board place in advance, measure anchor axial force by piezoelectric sensor.This method measuring accuracy can ensure, but cost is higher, and the cost of single piezoelectric sensor reaches unit up to ten thousand, can cause great waste if do not recycled, and the words of recovery then can cause anchor pole to lose efficacy, and threatens engineering safety.
First bolt deformation is passed to vibratory string by type vibration wire anchor ergometer, thus changes the vibration frequency of vibratory string.The distortion of vibratory string can be obtained by vibratory string frequency detecting, and then obtain the distortion of anchor pole, and then try to achieve the axle power of anchor pole.This method needs to be welded on anchor pole by the two ends of vibratory string in advance, not only complicated operation, and welding quality is difficult to ensure, but also considerably increases the installation difficulty of anchor pole.
Summary of the invention
The anchor axial force proving installation that the object of the present invention is to provide a kind of structure simple, cheap and application process thereof.
Its technical solution is: a kind of rockbolt stress proving installation, it is characterized in that mainly comprising: foam metal plate, upper padding plate, lower bolster and distance measuring instrument, foam metal plate is between upper padding plate and lower bolster, three is bonded together formation compoboard by cementing agent, and three is centrally located on same axis; Described foam metal plate, material is foam metal material, entirety is slab construction, shape is square or circle, and its center is provided with circular opening, and anchor pole or anchor cable can pass from this hole, this foam metal plate has the normal direction bearing capacity of the greatest axis power being not less than anchor pole or anchor cable, along with foam metal plate load increases, it is crushed gradually, has monotonically increasing relation between foam metal plate load and the displacement of generation; Described upper padding plate and lower bolster, be slab construction, and pertusate steel plate is established at center, and anchor pole or anchor cable can pass from hole, and its intensity is much larger than the intensity of foam metal plate; Described distance measuring instrument is for measuring the distance between upper lower bolster.
Application process of the present invention is:
1. compression verification is carried out to described foam metal plate; In normal direction, compression experiment is carried out to it by pressing machine, obtain its curves of stress-strain relationship;
2. skyhook or anchor cable; After the grouted part of anchor pole is fixed on anchor hole by employing conventional method, make the hole that anchor pole or anchor cable are reserved through compoboard, then clamp nut, tightly pushes down compoboard;
3. anchor pole or anchor cable start stressed after, anchor axial force by nut retroaction on compoboard, under pressure foam metal plate produce distortion; Measure the vertical range between upper padding plate and lower bolster by distance measuring instrument, and then according to both raw range, the relative displacement that its pressurized produces can be obtained, and then try to achieve normal strain;
4. according to the curves of stress-strain relationship that 1. step records, and the normal strain that 3. step records, convert and can obtain the stress of foam metal plate, and then try to achieve its load, this load equals the axle power of anchor pole or anchor cable.
Ultimate principle of the present invention is: according to the compression property of foam metal material, utilizes the determination relation between its load and distortion, the measurement of load is converted into the measurement of displacement, and then tries to achieve the axle power of anchor pole or anchor cable.
The invention has the beneficial effects as follows: this device and application process thereof make anchor axial force measurement become simple, greatly reduce measurement cost, the dynamic feedback design of its support for engineering site is significant.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the invention will be further described:
Fig. 1 is the principle schematic of rockbolt stress proving installation of the present invention and application process thereof;
Fig. 2 is the one of the stress-strain curve of described rockbolt stress proving installation.
Embodiment
By reference to the accompanying drawings 1, a kind of rockbolt stress proving installation, it is characterized in that mainly comprising: foam metal plate 1, upper padding plate 2, lower bolster 3 and distance measuring instrument, foam metal plate 1 is between upper padding plate 2 and lower bolster 3, three is bonded together formation compoboard by cementing agent, and three is centrally located on same axis; Described foam metal plate 1, material is foam metal material, entirety is slab construction, shape is square or circle, and its center is provided with circular opening, and anchor pole or anchor cable 4 can pass from this hole, this foam metal plate has the normal direction bearing capacity of the greatest axis power being not less than anchor pole or anchor cable, along with foam metal plate load increases, it is crushed gradually, has monotonically increasing relation between foam metal plate load and the displacement of generation; Described upper padding plate 2 and lower bolster 3, be slab construction, and pertusate steel plate is established at center, and anchor pole or anchor cable can pass from hole, and its intensity is much larger than the intensity of foam metal plate; Described distance measuring instrument is for measuring the distance between upper lower bolster.
Application process of the present invention is:
1. compression verification is carried out to described foam metal plate; In normal direction, compression experiment is carried out to it by pressing machine, obtain its curves of stress-strain relationship, as shown in Figure 2;
2. skyhook or anchor cable 4; After the grouted part of anchor pole is fixed on anchor hole by employing conventional method, make the hole that anchor pole or anchor cable are reserved through compoboard, then clamp nut 5, tightly pushes down compoboard;
3. anchor pole or anchor cable start stressed after, anchor axial force F by nut retroaction on compoboard, under pressure foam metal plate produce distortion; Measure the vertical range L between upper padding plate and lower bolster by distance measuring instrument, and then according to both raw range, the relative displacement that its pressurized produces can be obtained, and then try to achieve normal strain;
4. according to the curves of stress-strain relationship that 1. step records, and the normal strain that 3. step records, convert and can obtain the stress of foam metal plate, and then try to achieve its load, this load equals the axle power of anchor pole or anchor cable.
The above embodiment, the just one of the embodiment that the present invention is more preferably concrete, the usual change that those skilled in the art carries out within the scope of technical solution of the present invention and replacement all should be included in protection scope of the present invention.
Claims (2)
1. a rockbolt stress proving installation, it is characterized in that mainly comprising: foam metal plate, upper padding plate, lower bolster and distance measuring instrument, foam metal plate is between upper padding plate and lower bolster, and three is bonded together formation compoboard by cementing agent, and three is centrally located on same axis; Described foam metal plate, material is foam metal material, entirety is slab construction, shape is square or circle, and its center is provided with circular opening, and anchor pole or anchor cable can pass from this hole, this foam metal plate has the normal direction bearing capacity of the greatest axis power being not less than anchor pole or anchor cable, along with foam metal plate load increases, it is crushed gradually, has monotonically increasing relation between foam metal plate load and the displacement of generation; Described upper padding plate and lower bolster, be slab construction, and pertusate steel plate is established at center, and anchor pole or anchor cable can pass from hole, and its intensity is much larger than the intensity of foam metal plate; Described distance measuring instrument is for measuring the distance between upper lower bolster.
2. the application process of rockbolt stress proving installation as claimed in claim 1, is characterized in that comprising the following steps:
1. compression verification is carried out to described foam metal plate; In normal direction, compression experiment is carried out to it by pressing machine, obtain its curves of stress-strain relationship;
2. skyhook or anchor cable; After the grouted part of anchor pole is fixed on anchor hole by employing conventional method, make the hole that anchor pole or anchor cable are reserved through compoboard, then clamp nut, tightly pushes down compoboard;
3. anchor pole or anchor cable start stressed after, anchor axial force by nut retroaction on compoboard, under pressure foam metal plate produce distortion; Measure the vertical range between upper padding plate and lower bolster by distance measuring instrument, and then according to both raw range, the relative displacement that its pressurized produces can be obtained, and then try to achieve normal strain;
according to the curves of stress-strain relationship that 1. step records, and the normal strain that 3. step records, convert and can obtain the stress of foam metal plate, and then try to achieve its load, this load equals the axle power of anchor pole or anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510052247.2A CN104697674A (en) | 2015-02-01 | 2015-02-01 | Anchor rod stress testing device and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510052247.2A CN104697674A (en) | 2015-02-01 | 2015-02-01 | Anchor rod stress testing device and application method thereof |
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| CN104697674A true CN104697674A (en) | 2015-06-10 |
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| CN201510052247.2A Pending CN104697674A (en) | 2015-02-01 | 2015-02-01 | Anchor rod stress testing device and application method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136346A (en) * | 2015-07-31 | 2015-12-09 | 北京博源天衡科技有限公司 | Novel load sensor |
| CN106768564A (en) * | 2017-03-06 | 2017-05-31 | 山东科技大学 | A kind of multisection type anchor rod force-measuring device and application method |
| CN109458204A (en) * | 2018-09-21 | 2019-03-12 | 北方工业大学 | Anchor rod cable stress measuring device capable of giving out light and giving out early warning |
| CN114352331A (en) * | 2021-11-16 | 2022-04-15 | 重庆大学 | Anti-integrated energy-absorbing impact-resistant anchor rod and impact resistance method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480824Y (en) * | 2001-04-28 | 2002-03-06 | 祝向永 | Pad type optical fibere pressure sensor for rear stretching anchorage cable system |
| CN201000378Y (en) * | 2006-10-17 | 2008-01-02 | 中山盛兴股份有限公司 | Curtain wall tightwire pull force tester |
| CN102706492A (en) * | 2012-06-29 | 2012-10-03 | 山东大学 | Anchor rod dynamometer and dynamometry method for underground engineering model experiment |
| CN103162880A (en) * | 2011-12-19 | 2013-06-19 | 西安金和光学科技有限公司 | Prestressed anchor cable stress monitoring device |
| CN103573279A (en) * | 2013-11-14 | 2014-02-12 | 山东科技大学 | Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof |
| CN104111137A (en) * | 2014-08-11 | 2014-10-22 | 石家庄铁道大学 | Anchor rod bearing capacity prediction method based on cubic polynomial model |
| CN104296896A (en) * | 2014-11-04 | 2015-01-21 | 山东科技大学 | Direct reading type rock bolt dynamometer used for simulation test and working method thereof |
| CN204479217U (en) * | 2015-02-01 | 2015-07-15 | 山东科技大学 | Rockbolt stress proving installation |
-
2015
- 2015-02-01 CN CN201510052247.2A patent/CN104697674A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480824Y (en) * | 2001-04-28 | 2002-03-06 | 祝向永 | Pad type optical fibere pressure sensor for rear stretching anchorage cable system |
| CN201000378Y (en) * | 2006-10-17 | 2008-01-02 | 中山盛兴股份有限公司 | Curtain wall tightwire pull force tester |
| CN103162880A (en) * | 2011-12-19 | 2013-06-19 | 西安金和光学科技有限公司 | Prestressed anchor cable stress monitoring device |
| CN102706492A (en) * | 2012-06-29 | 2012-10-03 | 山东大学 | Anchor rod dynamometer and dynamometry method for underground engineering model experiment |
| CN103573279A (en) * | 2013-11-14 | 2014-02-12 | 山东科技大学 | Mining telescopic energy adsorption anti-impact viscous damping anchor rod and supporting method thereof |
| CN104111137A (en) * | 2014-08-11 | 2014-10-22 | 石家庄铁道大学 | Anchor rod bearing capacity prediction method based on cubic polynomial model |
| CN104296896A (en) * | 2014-11-04 | 2015-01-21 | 山东科技大学 | Direct reading type rock bolt dynamometer used for simulation test and working method thereof |
| CN204479217U (en) * | 2015-02-01 | 2015-07-15 | 山东科技大学 | Rockbolt stress proving installation |
Non-Patent Citations (1)
| Title |
|---|
| 王芳: "《泡沫金属制备、性能及应用》", 30 October 2012, 北京：国防工业出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136346A (en) * | 2015-07-31 | 2015-12-09 | 北京博源天衡科技有限公司 | Novel load sensor |
| CN105136346B (en) * | 2015-07-31 | 2018-11-06 | 北京博源天衡科技有限公司 | A kind of novel load sensor |
| CN106768564A (en) * | 2017-03-06 | 2017-05-31 | 山东科技大学 | A kind of multisection type anchor rod force-measuring device and application method |
| CN109458204A (en) * | 2018-09-21 | 2019-03-12 | 北方工业大学 | Anchor rod cable stress measuring device capable of giving out light and giving out early warning |
| CN114352331A (en) * | 2021-11-16 | 2022-04-15 | 重庆大学 | Anti-integrated energy-absorbing impact-resistant anchor rod and impact resistance method thereof |
| CN114352331B (en) * | 2021-11-16 | 2024-02-09 | 重庆大学 | Anti-integrated energy-absorbing impact-resistant anchor rod and impact-resistant method thereof |
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