CN107702637A - Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique - Google Patents
Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique Download PDFInfo
- Publication number
- CN107702637A CN107702637A CN201710976452.7A CN201710976452A CN107702637A CN 107702637 A CN107702637 A CN 107702637A CN 201710976452 A CN201710976452 A CN 201710976452A CN 107702637 A CN107702637 A CN 107702637A
- Authority
- CN
- China
- Prior art keywords
- anchor
- anchor pole
- strain
- whole
- rod
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
Abstract
The present invention relates to a kind of whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique, it is characterized in that, comprise the following steps：Two anchor pole valve bodies are printed using 3D printer；Resistance strain plate is axially pasted on the inwall of anchor pole valve body along anchor pole, resistance strain plate one end connection signal transmission cable, is then Anchor Bar by two anchor pole valve body bondings；By signal transmission cable by drawing in anchor pole and being connected with statical strain indicator, statical strain indicator is separately connected with computer, when anchor pole deforms, strain parameter caused by resistance strain plate is gathered by signal transmission cable by statical strain indicator, data after collection are recorded and calculated analysis by computer, finally draw anchor rod body strained situation.Its is simple to operate, reliability is high, eliminates influence of the binding agent to test data accuracy, fundamentally solves the problems, such as that test data deviation existing for whole-length cohesive anchor bolt body of rod strain testing method is big in existing laboratory test, testing cost is high.
Description
Technical field
The present invention relates to anchor pole strain testing field, particularly a kind of whole-length cohesive anchor bolt body of rod based on 3D printing technique
Strain testing method, suitable for laboratory test.
Background technology
One of important support form that whole-length cohesive anchor bolt is reinforced as underground engineering wall rock, had been obtained more next in the last few years
More it is widely applied.But because complicated shear action is influenceed between by anchor rod body and cementing agent, the whole-length cohesive anchor bolt body of rod
Stretching strain is difficult to accurate measurement always, causes the Evolution of body of rod stretching strain to be difficult to analyze, and also causes the anchoring of many engineerings
Design remains in empirically, or is uniformly distributed hypothesis along the body of rod using stress and is designed（This is not inconsistent with actual conditions）.
Laboratory test is one of common method for studying anchor pole strain.The anchor pole strain testing used in testing indoors both at home and abroad at present
Method is mainly resistor straining testing method and fiber grating method of testing.
Resistor straining testing method and fiber grating method of testing refer to that before rockbolt installation axial direction is laid outside the body of rod
Resistance strain plate or grating fibers and its sensor, anchor pole produce certain deformation after stress, can be measured according to deformation
The strain of the body of rod.But the foil gauge, grating fibers and sensor used in both approaches are pasted onto outside anchor pole, with
Binding agent directly or indirectly contacts, and can produce certain shear stress between each other, influences the accuracy of test data, and when viscous
Tie the plasticity of agent compared with it is strong, intensity is larger when, measured data can easy distortion.In addition, grating fibers easily damage, to surrounding
Environmental requirement is higher, and whole cost of testing system is higher.
The content of the invention
The invention aims to provide a kind of simple to operate, high total length bonding based on 3D printing technique of reliability
Anchor rod body strain testing method, influence of the binding agent to test data accuracy is eliminated, fundamentally solves existing indoor examination
Test the problem of test data deviation is big, testing cost is high existing for whole-length cohesive anchor bolt body of rod strain testing method.
The technical scheme is that：
A kind of whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique, it is characterised in that comprise the following steps：
Step 1）, whole-length cohesive anchor bolt is prepared using 3D printing technique, the whole-length cohesive anchor bolt is hollow anchor bar, its by respectively
Formed using two anchor pole valve bodies of 3D printer printing, axial direction is centrally formed in anchor pole when two anchor pole valve bodies merge into a single whole
Cavity and described axial cavity one end are blind end, the other end is opening end；
Step 2）, resistance strain plate is axially pasted on the inwall of one of anchor pole valve body along anchor pole, the resistance-type
Foil gauge one end connects signal transmission cable, is then Anchor Bar by two anchor pole valve bodies bonding, make resistance strain plate and
Signal transmission cable is arranged in axial cavity；
Step 3）, the blind end of Anchor Bar inserted in the drilling of test specimen, and anchor pole and test specimen are fixed as one with binding agent
Body；
Step 4）, by signal transmission cable by anchor pole axial cavity opening end draw and be connected with statical strain indicator, it is described
Statical strain indicator is separately connected with computer, when anchor pole deforms in test process, strain ginseng caused by resistance strain plate
Number is gathered by signal transmission cable by statical strain indicator, and the data after collection are recorded and calculated analysis by computer, most
Anchor rod body strained situation is drawn eventually.
The above-mentioned whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique, the hollow anchor bar it is transversal
Face is shaped as round outside but spuare inside.
The above-mentioned whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique, the resistance strain plate
Quantity is one or more.
The beneficial effects of the invention are as follows：
1st, it is of the invention that resistance strain plate is arranged in inside anchor pole compared with existing measuring technology, when anchor pole deforms
When, strain parameter is gathered by signal transmission cable by statical strain indicator caused by resistance strain plate, and is recorded by computer
And analyze, finally draw body of rod strained situation.Avoid foil gauge to be damaged by external binder, eliminate binding agent to testing number
According to interference, improve the accuracy of test data；
2nd, 3D printing technique have fast and automatically, directly and relatively accurately the threedimensional model designed in computer is converted into
The advantages that products in kind, the making demand to complicated shape anchor pole in laboratory test can be met；
3rd, the printed material for being available for 3D printing technique to select at present has a variety of, can print the particular anchor under a variety of likelihoods ratio
Bar, it is applied widely.
Brief description of the drawings
Fig. 1 is the cross-sectional structure schematic diagram of the whole-length cohesive anchor bolt of the present invention prepared based on 3D printing technique；
Fig. 2 is the test philosophy figure of the present invention.
In figure：1. whole-length cohesive anchor bolt, 1-1. anchor pole valves body I, 1-2. anchor pole valves body II, 2. axial cavities, 3. binding agents,
4. signal transmission cable, 5. resistance strain plates, 6. statical strain indicators, 7. computers, 8. test specimens.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique is somebody's turn to do, including such as
Lower step：
1）, whole-length cohesive anchor bolt is prepared using 3D printing technique, the whole-length cohesive anchor bolt 1 is hollow anchor bar, its by respectively profit
The 1-1 of anchor pole valve body I and the 1-2 of anchor pole valve body II composition printed with 3D printer, the 1-1 of anchor pole valve body I and the 1-2 of anchor pole valve body II are closed
And when being integrated anchor pole be centrally formed axial cavity 2 and the one end of the axial cavity 2 be blind end, the other end be opening end,
In the present embodiment, the shape of cross section of the hollow anchor bar is round outside but spuare inside, the 1-1 of anchor pole valve body I and the 1-2 structures of anchor pole valve body II
Size is identical.
2）, one or more resistance strain plates 5 are axially pasted on the inwall of anchor pole valve body along anchor pole, the resistance
The one end of formula foil gauge 5 connects signal transmission cable 4, is then Anchor Bar by two anchor pole valve body bondings using glue, makes electricity
Resistive foil gauge 5 and signal transmission cable 4 are arranged in axial cavity 2.In the present embodiment, the number of the resistance strain plate 5
Measure as one.
3）, the blind end of Anchor Bar inserted in the drilling of test specimen 8, and with binding agent 3 by miniature whole-length cohesive anchor bolt 1
It is fixed as one with test specimen 8.
4）, by the signal output part of signal transmission cable 4 by anchor pole axial cavity 2 opening end draw and with static state should
Become the signal input part connection of instrument 6, the signal output part of the statical strain indicator 6 is connected with computer 7, when micro- in test process
When type whole-length cohesive anchor bolt 1 deforms, strain parameter is static by signal transmission cable 4 caused by resistance strain plate 5
Deformeter 6 is gathered, and the data after collection are recorded and calculated analysis by computer 7, finally draws anchor rod body strained situation.
Utilize the resistor straining testing method and fiber grating method of testing point mentioned in the method and background technology of the present embodiment
50 groups of data are not tested, contrast situation such as following table：
| The present embodiment | Resistor straining testing method | Fiber grating method of testing | |
| Test data accuracy rate | 90% ± 5% | 70% ± 5% | 80% ± 5% |
| Testing cost | 500 yuan | 300 yuan | 3000 yuan |
Claims (3)
1. a kind of whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique, it is characterised in that including following step
Suddenly：
Step 1）, whole-length cohesive anchor bolt is prepared using 3D printing technique, the whole-length cohesive anchor bolt is hollow anchor bar, its by respectively
Formed using two anchor pole valve bodies of 3D printer printing, axial direction is centrally formed in anchor pole when two anchor pole valve bodies merge into a single whole
Cavity and described axial cavity one end are blind end, the other end is opening end；
Step 2）, resistance strain plate is axially pasted on the inwall of anchor pole valve body along anchor pole, the resistance strain plate one
End connection signal transmission cable, it is then Anchor Bar by two anchor pole valve body bondings, transmits resistance strain plate and signal
Cable is arranged in axial cavity；
Step 3）, the blind end of Anchor Bar inserted in the drilling of test specimen, and anchor pole and test specimen are fixed as one with binding agent
Body；
Step 4）, by signal transmission cable by anchor pole axial cavity opening end draw and be connected with statical strain indicator, it is described
Statical strain indicator is separately connected with computer, when anchor pole deforms in test process, strain ginseng caused by resistance strain plate
Number is gathered by signal transmission cable by statical strain indicator, and the data after collection are recorded and calculated analysis by computer, most
Anchor rod body strained situation is drawn eventually.
2. the whole-length cohesive anchor bolt body of rod strain testing method according to claim 1 based on 3D printing technique, its feature
It is：The shape of cross section of the hollow anchor bar is round outside but spuare inside.
3. the whole-length cohesive anchor bolt body of rod strain testing method according to claim 1 based on 3D printing technique, its feature
It is：The quantity of the resistance strain plate is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976452.7A CN107702637A (en) | 2017-10-19 | 2017-10-19 | Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710976452.7A CN107702637A (en) | 2017-10-19 | 2017-10-19 | Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107702637A true CN107702637A (en) | 2018-02-16 |
Family
ID=61181813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710976452.7A Pending CN107702637A (en) | 2017-10-19 | 2017-10-19 | Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107702637A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414293A (en) * | 2020-10-27 | 2021-02-26 | 西安电子科技大学 | Strain detection method for conduction cooling high-temperature superconducting cable |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3885423A (en) * | 1971-12-07 | 1975-05-27 | Bergwerksverband Gmbh | Method of measuring changes in the area surrounding a mining cavity |
| CN201188041Y (en) * | 2008-03-27 | 2009-01-28 | 山东大学 | Anchor rod for measuring optical fibre and grating |
| CN204591321U (en) * | 2014-10-10 | 2015-08-26 | 安徽理工大学 | A kind of novel stress measurement anchor pole being applied to supporting roadway surrounding rock |
| CN105240037A (en) * | 2015-10-21 | 2016-01-13 | 浙江工业大学 | Information anchor rod with detecting and alarming functions |
| CN106124401A (en) * | 2016-07-26 | 2016-11-16 | 山东科技大学 | Anchor pole bond strength testing method |
| CN106677812A (en) * | 2016-12-02 | 2017-05-17 | 大连理工大学 | Fiber grating force measurement anchor rod |
-
2017
- 2017-10-19 CN CN201710976452.7A patent/CN107702637A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3885423A (en) * | 1971-12-07 | 1975-05-27 | Bergwerksverband Gmbh | Method of measuring changes in the area surrounding a mining cavity |
| CN201188041Y (en) * | 2008-03-27 | 2009-01-28 | 山东大学 | Anchor rod for measuring optical fibre and grating |
| CN204591321U (en) * | 2014-10-10 | 2015-08-26 | 安徽理工大学 | A kind of novel stress measurement anchor pole being applied to supporting roadway surrounding rock |
| CN105240037A (en) * | 2015-10-21 | 2016-01-13 | 浙江工业大学 | Information anchor rod with detecting and alarming functions |
| CN106124401A (en) * | 2016-07-26 | 2016-11-16 | 山东科技大学 | Anchor pole bond strength testing method |
| CN106677812A (en) * | 2016-12-02 | 2017-05-17 | 大连理工大学 | Fiber grating force measurement anchor rod |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414293A (en) * | 2020-10-27 | 2021-02-26 | 西安电子科技大学 | Strain detection method for conduction cooling high-temperature superconducting cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101655432B (en) | uniaxial tension and soil beam bending tester | |
| CN103389247B (en) | Testing system for simulating hydraulic fracture of concrete members under high water pressure | |
| CN104122201A (en) | Device for measuring bond stress and slippage of reinforced concrete | |
| CN104198541B (en) | Solidifying and hardening progress monitoring system for mining cement filling slurry and monitoring method thereof | |
| CN207894799U (en) | A kind of test device of fiber and concrete interface cohesive force | |
| CN203117060U (en) | Stratometer | |
| CN202382726U (en) | Strain testing system of composite beams | |
| CN110208182A (en) | It is a kind of for measuring the measurement sensor and measurement method of bond-slip at fashioned iron and concrete interface | |
| CN206248252U (en) | A kind of anchor pole axial direction dynamometer | |
| CN107882011A (en) | A kind of miniature probe with temperature compensation function | |
| CN105241371A (en) | Resistance strain gauge | |
| CN206531769U (en) | Experiment of building material instrument calibrating installation | |
| CN105277439A (en) | Geotechnical triaxial test sample radial deformation testing device and method | |
| CN206311247U (en) | A kind of sensor device of power and displacement measurement based on distributed fibre optic sensing | |
| CN107702637A (en) | Whole-length cohesive anchor bolt body of rod strain testing method based on 3D printing technique | |
| CN206902781U (en) | The detection means of anchor pole internal force exterior measuring | |
| CN204988170U (en) | Bolt normal strain measuring device | |
| CN107271648B (en) | Consider the shrinkage stress measuring device that concrete creep influences | |
| CN207066755U (en) | The experimental rig of tunnel bottom structure accumulated damage under a kind of cyclic load | |
| CN204575041U (en) | A kind of anchor cable formula instrument of roof separation | |
| CN208606915U (en) | A kind of measuring device of steel tube component twin shaft residual stress | |
| CN201974138U (en) | Wide-range inner diameter measurement dial indicator | |
| CN109458976A (en) | A kind of device and its measuring method of the strain of measurement inside concrete | |
| CN205426502U (en) | Prestressing force strand steering gear mechanical testing device | |
| CN205861031U (en) | Total length binding type anchor pole effective anchorage depth the cannot-harm-detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Shaoquan Inventor after: Dong Longbin Inventor after: Han Tao Inventor after: Liu Zhaosheng Inventor after: Zhou Yu Inventor after: He Xiang Inventor before: Wang Shaoquan Inventor before: Dong Longbin Inventor before: Liu Zhaosheng Inventor before: Zhou Yu Inventor before: He Xiang |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |