CN104790994A - Anchor rod stress state rapid assessment device and application method thereof - Google Patents
Anchor rod stress state rapid assessment device and application method thereof Download PDFInfo
- Publication number
- CN104790994A CN104790994A CN201510049482.4A CN201510049482A CN104790994A CN 104790994 A CN104790994 A CN 104790994A CN 201510049482 A CN201510049482 A CN 201510049482A CN 104790994 A CN104790994 A CN 104790994A
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- CN
- China
- Prior art keywords
- foam metal
- enamel coating
- anchor rod
- metal plate
- stress state
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- 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.)
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Classifications
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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 discloses an anchor rod stress state rapid assessment device. The anchor rod stress state rapid assessment device is characterized by comprising a foam metal plate and an enamel coating; the material of the foam metal plate is a porous foam metal material; the surface of the upper side of the foam metal plate is coated with the enamel coating; when an anchor rod is installed, the device is installed between a tray and a screw nut of the anchor rod, with the stress received by the anchor rod increases gradually, the enamel coating on the foam metal plate gradually cracks off from interior to exterior, the stress state of the anchor rod is determined rapidly according to the size of the cracking-off range of the enamel coating, and the larger the cracking-off range of the enamel coating is, the more stress the anchor rod bears. By means of the anchor rod stress state rapid assessment device, by the utilization of the deformation characteristics of the foam metal plate, the stress state of the anchor rod is linked with the cracking-off range of the enamel coating, the stress state of the anchor rod can be determined rapidly and visually through observation, and an anchor rod support function rapid assessment method applied to a project site is provided.
Description
Technical field
The present invention relates to underground construction anchor structure health detection field, specifically a kind of device for rapid evaluation rockbolt stress state and application process thereof.
Background technology
In recent years, anchor pole obtains a wide range of applications in underground engineering support field, has played important function 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, generally using anchor axial force as important evaluation index, 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 sensor mensuration and type vibration wire rock bolt extensometer.
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 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 sensor mensuration refers to installs a pressure sensor in advance at anchor rod pallet board place, directly measures anchor axial force by pressure sensor.This method certainty of measurement can ensure, but cost is higher, and the cost of single pressure 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 rock bolt extensometer, 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 object of the present invention is to provide a kind of device for rapid evaluation rockbolt stress state and application process thereof, its technical solution is:
A kind of rockbolt stress state rapid evaluation device, is characterized in that mainly comprising: foam metal plate and enamel coating; Described foam metal plate, material is porous foam metal material, and entirety is slabbed construction, and shape is square or circle, and its center is provided with circular opening, and anchor pole can pass from this hole; Described enamel coating, applies the uper side surface at foam metal plate, and enamel coating surface arranges equidistant annulus or graduation mark etc., for judging the pattern of the spacing of any point and central point on foam metal plate fast.
Application process of the present invention is:
1., during skyhook, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet of anchor pole and nut, then clamp nut;
2. along with rockbolt stress increases gradually, the foam metal plate pressurized near nut starts distortion, and deformed region is expanded laterally gradually; In the process, the avalanche gradually from inside to outside of the enamel coating on foam metal plate;
3. according to the avalanche scope of enamel coating, the stress of anchor pole is determined fast, according to being: enamel coating avalanche scope is larger, and rockbolt stress is larger.
General principle of the present invention is: the deformation characteristic utilizing foam metal plate, the avalanche scope of rockbolt stress state and enamel coating is connected, by observing the stress that can judge anchor pole fast, intuitively, provide a kind of bolt support effect fast evaluation method being applicable to engineering site.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described:
Fig. 1 is the principle schematic of rockbolt stress state rapid evaluation device of the present invention and application process thereof;
Fig. 2 is the one typical case pattern that enamel coating of the present invention surface is arranged.
Detailed description of the invention
By reference to the accompanying drawings 1, a kind of rockbolt stress state rapid evaluation device, is characterized in that mainly comprising: foam metal plate 1 and enamel coating 2; Described foam metal plate 1, material is porous foam metal material, and entirety is slabbed construction, and shape is square or circle, and its center is provided with circular opening, and anchor pole a can pass from this hole; Described enamel coating 2, applies the uper side surface at foam metal plate; As shown in Figure 2, enamel coating surface arranges equidistant annulus pattern, for judging enamel coating avalanche range size fast.
Application process of the present invention is:
1., during skyhook a, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet b of anchor pole and nut c, then clamp nut c;
2. along with rockbolt stress increases gradually, the foam metal plate pressurized near nut c starts distortion, and deformed region is expanded laterally gradually; In the process, the avalanche gradually from inside to outside of the enamel coating on foam metal plate;
3. according to the avalanche scope of enamel coating, the stress of anchor pole can be determined fast, according to being: enamel coating avalanche scope is larger, and rockbolt stress is larger.
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 state rapid evaluation device, is characterized in that mainly comprising: foam metal plate and enamel coating; Described foam metal plate, material is porous foam metal material, and entirety is slabbed construction, and shape is square or circle, and its center is provided with circular opening, and anchor pole can pass from this hole; Described enamel coating, applies the uper side surface at foam metal plate, and enamel coating surface arranges the patterns such as equidistant annulus or graduation mark.
2. the application process of rockbolt stress state rapid evaluation device as claimed in claim 1, is characterized in that comprising the following steps:
1., during skyhook, above-mentioned rockbolt stress state rapid evaluation device is arranged between the pallet of anchor pole and nut, then clamp nut;
2. along with rockbolt stress increases gradually, the foam metal plate pressurized near nut starts distortion, and deformed region is expanded laterally gradually; In the process, the avalanche gradually from inside to outside of the enamel coating on foam metal plate;
3. according to the avalanche scope of enamel coating, the stress of anchor pole is determined fast, according to being: enamel coating avalanche scope is larger, and rockbolt stress is larger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049482.4A CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049482.4A CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104790994A true CN104790994A (en) | 2015-07-22 |
| CN104790994B CN104790994B (en) | 2017-01-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510049482.4A Expired - Fee Related CN104790994B (en) | 2015-02-01 | 2015-02-01 | Rockbolt stress state rapid evaluation device and application process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104790994B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401628A (en) * | 2016-12-02 | 2017-02-15 | 大连理工大学 | Tightness degree test anchor rod and tightness degree test system |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4904122A (en) * | 1987-08-06 | 1990-02-27 | Dyckerhoff & Widmann Aktiengesellschaft | Anchoring device, such as a rock anchor |
| FR2841273A1 (en) * | 2002-06-20 | 2003-12-26 | Astare | Device for placing pre-stress on sealed anchoring rod comprises extension piece screwed onto existing anchoring, spacer and support washer on part to be held and spring washers stacked on extension piece |
| CN200952965Y (en) * | 2006-03-22 | 2007-09-26 | 贾喜荣 | Anchorage cable and roofbolt pretightening force monitor |
| CN103016037A (en) * | 2012-12-28 | 2013-04-03 | 山东大学 | Novel yielding anchor rod elastic round tray for displaying pre-tightening force and use method thereof |
| 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 |
| CN204457829U (en) * | 2015-02-01 | 2015-07-08 | 山东科技大学 | Rockbolt stress state rapid evaluation device |
-
2015
- 2015-02-01 CN CN201510049482.4A patent/CN104790994B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4904122A (en) * | 1987-08-06 | 1990-02-27 | Dyckerhoff & Widmann Aktiengesellschaft | Anchoring device, such as a rock anchor |
| FR2841273A1 (en) * | 2002-06-20 | 2003-12-26 | Astare | Device for placing pre-stress on sealed anchoring rod comprises extension piece screwed onto existing anchoring, spacer and support washer on part to be held and spring washers stacked on extension piece |
| CN200952965Y (en) * | 2006-03-22 | 2007-09-26 | 贾喜荣 | Anchorage cable and roofbolt pretightening force monitor |
| CN103016037A (en) * | 2012-12-28 | 2013-04-03 | 山东大学 | Novel yielding anchor rod elastic round tray for displaying pre-tightening force and use method thereof |
| 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 |
| CN204457829U (en) * | 2015-02-01 | 2015-07-08 | 山东科技大学 | Rockbolt stress state rapid evaluation device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401628A (en) * | 2016-12-02 | 2017-02-15 | 大连理工大学 | Tightness degree test anchor rod and tightness degree test system |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104790994B (en) | 2017-01-04 |
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Granted publication date: 20170104 Termination date: 20170201 |
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