CN105841860A - Quantum dot crustal stress testing device, and preparation method and using method thereof - Google Patents
Quantum dot crustal stress testing device, and preparation method and using method thereof Download PDFInfo
- Publication number
- CN105841860A CN105841860A CN201610278341.4A CN201610278341A CN105841860A CN 105841860 A CN105841860 A CN 105841860A CN 201610278341 A CN201610278341 A CN 201610278341A CN 105841860 A CN105841860 A CN 105841860A
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- China
- Prior art keywords
- quantum dot
- natural rubber
- face
- crack
- testing device
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Links
- 239000002096 quantum dot Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000009662 stress testing Methods 0.000 title abstract 2
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 claims abstract description 23
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 23
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 19
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 19
- 229920001194 natural rubber Polymers 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims abstract description 12
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 15
- 239000010409 thin film Substances 0.000 claims description 7
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000010408 film Substances 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract 2
- 238000005553 drilling Methods 0.000 abstract 1
- 239000013307 optical fiber Substances 0.000 abstract 1
- 238000001291 vacuum drying Methods 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a quantum dot crustal stress testing device, and a preparation method and using method thereof. The testing device includes a natural rubber cylinder (1). The top face (3) of the natural rubber cylinder is provided with a micro crack (4) with a known width. The surface layer of the top face (3) is coated with a quantum dot epoxy resin film (2). The preparation method includes adding quantum dots dissolved in chloroform after mixing the epoxy resin and a curing agent; pasting the quantum dot epoxy resin on the top face of the natural rubber cylinder and performing vacuum drying for more than 5 hours. The using method includes placing the testing device into a drilling hole and performing grouting, enabling the top face of the testing device to be flush with a rock body; using a field camera telescope to take pictures of the surface layer crack in the top face of the testing device; using a portable optical fiber spectrograph for collecting fluorescence intensity of the crack position and non-crack positions in field; obtaining a relation between crack change amount and stress through computer operation. The invention has advantages that repeated use is achieved and the measurement precision is improved distinctively.
Description
Technical field
The invention belongs to Geotechnical Engineering stress test technical field, be specifically related to the method that this device of detecting earth stress device, preparation method and use of a kind of quantum dot implements detecting earth stress.
Background technology
Crustal stress is the basic active force causing underground engineering rock mass deformation and destruction, accurately obtains crustal stress vector value and determines that engineering rock mass mechanical attribute, carries out Stability Analysis of The Surrounding Rock, it is achieved Underground Engineering Excavation design of its support and the prerequisite of the scientification of decision-making.
At present, the method for test crustal stress has a lot, such as hydraulic fracturing, stress relief method, acoustic-emission, flat jack method, BWSRM method etc. both at home and abroad.Yet with problems such as the limitation such as precision, the scope of application and engineering rock mass particularitys, detecting earth stress method the most frequently used in current engineering practice is mainly hydraulic fracturing and stress relief method.Hydraulic fracturing is mainly by insulating a bit of boring in the borehole, injects water to packing section, and carrys out stress definitely by the spalling of hole wall rock mass.Stress relief method is mainly by solving de-stress, and core deforms upon, by recording strain and stress definitely.But, there is nonrepeatability in these methods, the problem such as the degree of accuracy of measurement data is the highest.
Summary of the invention
The problem existed for prior art, the technical problem to be solved is just to provide the detecting earth stress device of a kind of quantum dot, and it can reuse test, and can improve the degree of accuracy of measurement data.Also provide for a kind of method preparing this device.Reoffering a kind of method using this test device to implement detecting earth stress, the method more intuitively can obtain measurement data easily, and the data of collection are the finest.
In order to solve above-mentioned technical problem, the detecting earth stress device of a kind of quantum dot that the present invention provides, including natural rubber cylinder, the cylindrical end face of natural rubber is provided with the micro-crack of a known width, scribbles quantum dot epoxy resin film on the top layer of the cylindrical end face of natural rubber.
The preparation method of a kind of said apparatus that the present invention provides: after epoxy resin mixes with firming agent, add the quantum dot being dissolved in chloroform, obtain quantum dot ring epoxy resins after agitated, quantum dot ring epoxy resins is coated in the cylindrical end face of natural rubber, is vacuum dried more than 5 hours.
A kind of method implementing detecting earth stress for above-mentioned test device that the present invention provides, comprises the following steps:
Step 1, boring at rock mass tested point, and hole wall is cleared up；
Step 2, being placed in boring by above-mentioned test device and slip casting, the end face of test device is concordant with rock mass；
Step 3, use ultraviolet lighting shot-light irradiate the quantum dot epoxy resin thin film of test device end face, and use high-precision On-site photo microscope to take pictures the top layer crackle of test device end face；Use the fluorescence intensity signals of portable fiber-optic spectrometer collection in worksite cracks and non-cracks simultaneously；
Step 4, the photo of all collections and fluorescence intensity signals are transmitted to computer, by these data are processed, accurately measure top layer crack width；
Step 5, variable quantity according to crack width, by above-mentioned test device by indoor true triaxial experimental calibration, and binding isotherm is derived and numerical simulation, draws the relational expression between crackle variable quantity and stress by Computing.
Owing to the test device of the present invention is made up of natural rubber, good springiness, intensity is high, the micro-crack that end face top layer is made after device pressurized, cracks can spread.After device places a period of time, use On-site photo microscope and portable fiber-optic spectrometer that crack width is determined, then send data to computer terminal, draw crustal stress size by software for calculation.After testing the crustal stress of this point, device can take out, because natural rubber good springiness, the crackle of extension, after device takes out, can recover as before, and device can be reused.
Quantum dot ring epoxy resins is coated in device end face top layer, forming quantum dot epoxy resin thin film, irradiate quantum dot epoxy resin thin film with ultraviolet lighting shot-light, quantum dot produces fluorescence, received fluoroscopic image by the probe of portable fiber-optic spectrometer again, be stored in and take in formula fiber spectrometer.Along with the extension of crackle, the fluorescence of quantum dot epoxy resin thin film can strengthen, and the fluorescence of cracks is significantly different with non-cracks fluorescence intensity.Using On-site photo microscope to measure after the top layer crackle shooting of device end face, certainty of measurement can reach μm；Use the fluorescence intensity signals of portable fiber-optic spectrometer harvester end face cracks and non-cracks simultaneously, and be accurately obtained the width of crackle by analysis of fluorescence intensity.Therefore, On-site photo microscope is used in combination with portable fiber-optic spectrometer, more accurately draws the top layer crackle variable quantity of test device end face.
The present invention use this high resiliency of natural rubber, high intensity material as beaer, after making device stress, crackle can extend, and simultaneously also enables devices to reuse.Use quantum dot epoxy resin film, the change of crackle μm level can be made all to measure accurately, make certainty of measurement improve.Compared with prior art, the invention have the advantage that and can reuse, certainty of measurement significantly improves.
Accompanying drawing explanation
The accompanying drawing of the present invention is described as follows:
Fig. 1 is the structural representation of the test device of the present invention；
Fig. 2 be the present invention test device install and use schematic diagram.
In figure: 1. natural rubber cylinder；2. quantum dot epoxy resin thin film；3. end face；4. micro-crack；5. portable fiber-optic spectrometer；6. On-site photo microscope；7. ultraviolet lighting shot-light；8. boring；9. slip casting.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
As it is shown in figure 1, the inventive system comprises natural rubber cylinder 1, the cylindrical end face of natural rubber 3 is provided with the micro-crack 4 of a known width, scribbles quantum dot epoxy resin film 2 on the top layer of the cylindrical end face of natural rubber 3.
The preparation method of apparatus of the present invention is: after epoxy resin mixes with firming agent, adds the quantum dot being dissolved in chloroform after cleaning, and the quantum dot ring epoxy resins after stirring is coated in the cylindrical end face of natural rubber, is vacuum dried more than 5 hours.
As in figure 2 it is shown, use the present invention to test the method that device implements detecting earth stress, comprise the following steps:
Step 1, boring at rock mass tested point, and hole wall is cleared up；
Step 2, above-mentioned test device is placed into boring 8 in, the present invention test device and boring 8 gap between have slip casting 9, the end face of device is concordant with rock mass；
Step 3, use ultraviolet lighting shot-light 7 irradiate the quantum dot epoxy resin thin film of test device end face, and use high-precision On-site photo microscope 6 to take pictures the top layer crackle of test device end face；Use the fluorescence intensity signals of portable fiber-optic spectrometer 5 collection in worksite cracks and non-cracks simultaneously；
Step 4, the photo of all collections and fluorescence intensity signals are transmitted to computer, by these data are processed, accurately measure top layer crack width；
Step 5, variable quantity according to crack width, by above-mentioned test device by indoor true triaxial experimental calibration, and binding isotherm is derived and numerical simulation, draws the relational expression between crackle variable quantity and stress by Computing.
The principle of calibration experiment, with Brazilian disc is tested, first arranges micro-crack at sample, is then loaded onto destruction by charger, obtains the stress of its crackle--crackle change curve, thus obtain crack width with the relation between stress.
Claims (3)
1. the detecting earth stress device of a quantum dot, it is characterized in that: include natural rubber cylinder (1), the cylindrical end face of natural rubber (3) is provided with the micro-crack (4) of a known width, scribbles quantum dot epoxy resin film (2) on the top layer of the cylindrical end face of natural rubber (3).
2. prepare the method testing device described in claim 1 for one kind, it is characterized in that: after epoxy resin mixes with firming agent, add the quantum dot being dissolved in chloroform, quantum dot ring epoxy resins is obtained after agitated, quantum dot ring epoxy resins is coated in the cylindrical end face of natural rubber, is vacuum dried more than 5 hours.
3. use the method that device implements detecting earth stress of testing described in claim 1, it is characterized in that, comprise the following steps:
Step 1, boring at rock mass tested point, and hole wall is cleared up；
Step 2, being placed in boring by described test device and slip casting, the end face of test device is concordant with rock mass；
Step 3, use ultraviolet lighting shot-light irradiate the quantum dot epoxy resin thin film of test device end face, and use high-precision On-site photo microscope to take pictures the top layer crackle of test device end face；Use the fluorescence intensity signals of portable fiber-optic spectrometer collection in worksite cracks and non-cracks simultaneously；
Step 4, the photo of all collections and fluorescence intensity signals are transmitted to computer, by these data are processed, accurately measure top layer crack width；
Step 5, variable quantity according to crack width, by described test device by indoor true triaxial experimental calibration, and binding isotherm is derived and numerical simulation, draws the relational expression between crackle variable quantity and stress by Computing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278341.4A CN105841860A (en) | 2016-04-29 | 2016-04-29 | Quantum dot crustal stress testing device, and preparation method and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610278341.4A CN105841860A (en) | 2016-04-29 | 2016-04-29 | Quantum dot crustal stress testing device, and preparation method and using method thereof |
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|---|---|
| CN105841860A true CN105841860A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610278341.4A Pending CN105841860A (en) | 2016-04-29 | 2016-04-29 | Quantum dot crustal stress testing device, and preparation method and using method thereof |
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| CN (1) | CN105841860A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680288A (en) * | 2018-03-27 | 2018-10-19 | 天津大学 | A method of utilizing the mechanical response of organic mechanoluminescence material tests mechanical part |
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| CN101520317A (en) * | 2009-04-10 | 2009-09-02 | 山东大学 | Rock deforming and cracking three-dimensional dynamic testing system based on fiber strain sensing |
| CN102095677A (en) * | 2010-12-01 | 2011-06-15 | 浙江大学 | Method for monitoring corrosion cracks of reinforced concrete and sensor |
| CN102175366A (en) * | 2011-03-05 | 2011-09-07 | 河南理工大学 | Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state |
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Application publication date: 20160810 |