CN109696263A - A kind of device and test method for testing the existing stress of concrete - Google Patents
A kind of device and test method for testing the existing stress of concrete Download PDFInfo
- Publication number
- CN109696263A CN109696263A CN201910129458.XA CN201910129458A CN109696263A CN 109696263 A CN109696263 A CN 109696263A CN 201910129458 A CN201910129458 A CN 201910129458A CN 109696263 A CN109696263 A CN 109696263A
- Authority
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- China
- Prior art keywords
- concrete
- drilling pipe
- fuselage
- fiber
- column
- 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
- 239000004567 concrete Substances 0.000 title claims abstract description 37
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 238000010998 test method Methods 0.000 title claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 2
- 239000011888 foil Substances 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 239000011513 prestressed concrete Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 206010054949 Metaplasia Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 230000002787 reinforcement Effects 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
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- 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
- G01L1/242—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 the material being an optical fibre
- G01L1/246—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 the material being an optical fibre using integrated gratings, e.g. Bragg gratings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of devices and test method for testing the existing stress of concrete, it is connected with column on pedestal and stablizes bolt, fuselage is connect by column up-down rack gear with column, motor, drilling pipe, protection casing is arranged on the fuselage, engine connects driving wheel, driving wheel drives the driven wheel to rotate by belt, driven wheel drives drilling pipe rotation, the lifting that lifting handle controls the fuselage is provided on fuselage, the displacement sensors such as resistance strain gage and fiber grating are located at the concrete surface to drill core position of drilling pipe front end, the data line of sensor exports from fiber grating line protective case and is connected to matched signal demodulation readout instrument.The present apparatus is while drilling pipe core boring sampling, by the foil gauge for being pasted onto core sample surface, the strain variation of concrete component test zone can be measured real-time continuously, when strain stable is in a certain value, the stress in the region is accurately obtained by elasticity modulus, it is accurate to measure the tested existing stress of concrete members.
Description
Technical field
The present invention relates to building builds to foundation engineering and detection fields, more specifically, it relates to a kind of test concrete
The device and test method of existing stress.
Background technique
In concrete structure, prestressing force has played significant role.Especially in highway bridge, prestressed concrete bridge
Beam is most widely used.Show according to statistics in the late three decades, in the built concrete-bridge in China, Prestressed Concrete Bridges account for 75%
More than.The design reference period of highway in China bridges and culverts structure is 100 years at present.It after bridge is built up, is detected, assesses it
Whether design requirement is reached.During bridge operation, due to the long term of natural environment and vehicular load, inevitable real estate
Raw damage accumulation and degradation resistance, structural behaviour generate variation, it is also desirable to periodically effectively be examined to the reliability of these bridges
It surveys and assesses, it is ensured that structure safety.
The assessments of Prestressed Concrete Bridges, maintenance and reinforcement and enhancing precondition, be it needs to be determined that structure in service
Working condition.Existing stress is an important indicator of evaluation structure service state, only passes through design drawing, it then follows corresponding rule
Model theoretically calculates the existing stress determined in prestressed reinforced concrete construction, and meeting and actual conditions generate biggish deviation, until
A kind of modern measurement method with enough accuracy not yet can carry out the existing stress of existing prestressed reinforced concrete construction effective
Measurement and assessment.
In contrast, stress free method is the measurement existing stress more effective method of prestressed concrete beam.This method
Basic principle be to be released the stress of cutting cube using the method for machine cuts the test member with primary stress,
And the strain in cutting front and back release area is tested using test equipment, the stress of component is obtained according to the constitutive relation of material
State.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of dress for testing the existing stress of concrete
It sets and test method, using stress free method as theoretical basis, while drilling pipe core boring sampling, by being pasted onto core sample surface
Foil gauge or sensor measure the strain variation of concrete component test zone real-time continuously, when strain stable is a certain
When value, the stress in the region is accurately obtained by stress-strain Constitutive Relationship by measurement elasticity modulus.
To achieve the above object, the present invention provides the following technical scheme that
It is a kind of test the existing stress of concrete device, including pedestal, column, column up-down rack gear, motor, drilling pipe,
Protect casing, driving wheel, wire-clamping device, fiber grating line protective case, driven wheel, fuselage, lifting handle, resistance strain gage, light
Fiber grating sensor stablizes bolt, signal (FBG) demodulator, signal readout instrument, temperature compensator, concrete component, on the pedestal
Be connected with column and stablize bolt, the fuselage is connect by column up-down rack gear with the column, the motor, drilling pipe,
It protects casing, be arranged on the fuselage, the engine connects the driving wheel, and the driving wheel passes through described in belt drive
Driven wheel rotation, the driven wheel drive the drilling pipe rotation, are provided with lifting handle on the fuselage and control the fuselage
Lifting, the foil gauge or fiber-optic grating sensor are located at the concrete surface to drill core position of drilling pipe front end, the strain
The data line of piece exports from the fiber grating line protective case and is connected to fixed ambient signals (FBG) demodulator by data line, letter
Number (FBG) demodulator is connected with temperature compensator and signal readout instrument, and temperature compensator is used to compensation temperature and brings answering for concrete component
Variation, signal readout instrument are used to read the strain displacement changing value of foil gauge or sensor.
Further, the drilling pipe top is equipped with into water valve.
Further, the fiber grating line protective case is hollow circular section shape, is placed on the location mid-shaft of drilling pipe.
Further, the fiber grating is long gauge length novel sensor.
Further, the thin slice waterproof and heat-insulating that is encapsulated as of the fiber-optic grating sensor and resistance strain gage encapsulates.
Using the test method of the device of the test existing stress of concrete, include the following steps:
(1) pass through pedestal and stablize bolt and machine is stably fixed on tested concrete component；
(2) fiber-optic grating sensor and resistance strain gage are posted in detected concrete component surface, adjust lifting handle,
Make drilling pipe bottom close to tested region；
(3) it opens motor switch and enters water valve, lifting handle is adjusted in core boring sampling, while passing by fiber grating
The inductive transfer of sensor or resistance strain gage gives signal (FBG) demodulator, and temperature compensator can eliminate temperature bring strain variation, letter
Data are transmitted to signal readout instrument again by number (FBG) demodulator, can measure the strain variation value of tested region in real time；
(4) stop drill core when strain is in a certain stationary value, rise lifting handle, close into water valve；
(5) strain data is saved, and takes out core sample and measures core sample concrete strength, stress and intensity can be measured simultaneously.
By using above-mentioned technical proposal, the present apparatus is using stress free method as theoretical basis, in the same of drilling pipe core boring sampling
When, by being pasted onto the foil gauge and fiber-optic grating sensor on core sample surface, concrete component survey can be measured real-time continuously
The strain variation for trying region, it is accurate by stress-strain Constitutive Relationship by measurement elasticity modulus when strain stable is in a certain value
Obtain the stress in the region, accurate measure is tested the existing stress of concrete members, uses convenient for investment engineering and factory is serial
Metaplasia produces.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of invention；
Appended drawing reference in figure: 1. pedestals 2. stablize 3. column of bolt, 4. column up-down rack gear, 5. motor 6. and protect casing 7.
8. driving wheel of drilling pipe, 9. wire-clamping device, 10. 12. fuselage of fiber grating line 11. driven wheel of protective case, 13. lifting handle 14. enters water valve
15. 19. signal (FBG) demodulator of fiber-optic grating sensor 16. resistance strain gage, 17. temperature compensator, 18. signal readout instrument, 20. coagulation
Native component.
Specific embodiment
In order to make those skilled in the art that the present invention may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
The embodiment of the present invention is described further referring to attached drawing 1.
It is a kind of test the existing stress of concrete device, including pedestal 1, stablize bolt 2, column 3, column up-down rack gear 4,
Motor 5, protection casing 6, drilling pipe 7, driving wheel 8, wire-clamping device 9, fiber grating line protective case 10, driven wheel 11, fuselage 12,
Lifting handle 13, fiber-optic grating sensor 15, resistance strain gage 16, temperature compensator 17, signal readout instrument 18, signal (FBG) demodulator
19, concrete component 20 are connected with column 3 on the pedestal 1 and stablize bolt 2, and the fuselage 12 passes through column up-down rack gear 4
It is connect with the column 3, the motor 5, drilling pipe 7, protection casing 6, lifting handle 13 are arranged on the fuselage 12, institute
It states motor 5 and connects the driving wheel 8, the driving wheel 8 drives the driven wheel 11 to rotate by belt, the driven wheel 11
It drives the drilling pipe 7 to rotate, is provided with the lifting that lifting handle 13 controls the fuselage 12, the optical fiber light on the fuselage 12
Gate sensor 15 and resistance strain gage 16 are located at the concrete surface to drill core position of 7 front end of drilling pipe, and the fiber grating passes
The data line of sensor 15 and resistance strain gage 16 is exported from the fiber grating line protective case 10 and is connected to around fixed
Signal (FBG) demodulator 19.
Further, 7 top of drilling pipe is equipped with into water valve 14.
Further, the fiber grating line protective case 10 is hollow circular section shape, is placed on the location mid-shaft of drilling pipe 7.
Further, the fiber-optic grating sensor 15 is long gauge length novel sensor.
Further, the thin slice waterproof and heat-insulating that is encapsulated as of the fiber-optic grating sensor 15 and resistance strain gage 16 encapsulates.
When in use, implementation steps are as follows for the present apparatus:
1, machine is stably fixed on tested concrete component by pedestal and stable bolt.
2, fiber-optic grating sensor and resistance strain gage are posted in detected concrete component surface, adjust lifting handle,
Make drilling pipe bottom close to tested region.
3, it opens motor switch and enters water valve, lifting handle is adjusted in core boring sampling, while passing by fiber grating
The inductive transfer of sensor or resistance strain gage gives signal (FBG) demodulator, and temperature compensator can eliminate temperature bring strain variation, letter
Data are transmitted to signal readout instrument again by number (FBG) demodulator, can measure the strain variation value of tested region in real time.
4, stop drill core when strain is in a certain stationary value, rise lifting handle, close into water valve.
5, strain data is saved, and takes out core sample and measures core sample concrete strength, stress and intensity can be measured simultaneously.
The preferred embodiment of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, several deformations can also be made, improves and substitutes, these belong to this hair
Bright protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (6)
1. a kind of device for testing the existing stress of concrete, which is characterized in that including pedestal (1), stablize bolt (2), column
(3), column up-down rack gear (4), motor (5), protection casing (6), drilling pipe (7), driving wheel (8), wire-clamping device (9), optical fiber
Grid stroke protective case (10), driven wheel (11), fuselage (12), lifting handle (13), fiber-optic grating sensor (15), resistance-strain
Piece (16), temperature compensator (17), signal readout instrument (18), signal (FBG) demodulator (19), concrete component (20), the pedestal
(1) it is connected with column (3) on and stablizes bolt (2), the fuselage (12) passes through column up-down rack gear (4) and the column (3)
Connection, the motor (5), drilling pipe (7), protection casing (6), lifting handle (13) are arranged on the fuselage (12), institute
It states motor (5) and connects the driving wheel (8), the driving wheel (8) drives the driven wheel (11) to rotate by belt, described
Driven wheel (11) drives drilling pipe (7) rotation, is provided with lifting handle (13) on the fuselage (12) and controls the fuselage
(12) lifting, the fiber-optic grating sensor (15) and resistance strain gage (16) be located at drilling pipe (7) front end to drill core position
Concrete surface, the data line of the fiber-optic grating sensor (15) and resistance strain gage (16) protects from the fiber grating line
The signal (FBG) demodulator (19) for exporting and being connected to around fixed in sheath (10).
2. a kind of device for testing the existing stress of concrete according to claim 1, which is characterized in that the drilling pipe (7)
Top is equipped with into water valve (14).
3. a kind of device for testing the existing stress of concrete according to claim 1, which is characterized in that the fiber grating
Line protective case (10) is hollow circular section shape, is placed on the location mid-shaft of drilling pipe (7).
4. a kind of device for testing the existing stress of concrete according to claim 1, which is characterized in that the fiber grating
Sensor (15) is long gauge length novel sensor.
5. a kind of device for testing the existing stress of concrete according to claim 4, which is characterized in that the fiber grating
The thin slice waterproof and heat-insulating that is encapsulated as of sensor (15) and resistance strain gage (16) encapsulates.
6. a kind of test method using the device for testing the existing stress of concrete described in claim 1-5 any one,
It is characterized in that, includes the following steps:
(1) pass through pedestal and stablize bolt and machine is stably fixed on tested concrete component；
(2) fiber-optic grating sensor and resistance strain gage are posted in detected concrete component surface, adjusts lifting handle, makes to bore
Cylinder bottom is close to tested region；
(3) it opens motor switch and enters water valve, lifting handle is adjusted in core boring sampling, while passing through fiber-optic grating sensor
Or the inductive transfer of resistance strain gage gives signal (FBG) demodulator, temperature compensator can eliminate temperature bring strain variation, signal solution
It adjusts instrument that data are transmitted to signal readout instrument again, the strain variation value of tested region can be measured in real time；
(4) stop drill core when strain is in a certain stationary value, rise lifting handle, close into water valve；
(5) strain data is saved, and takes out core sample and measures core sample concrete strength, stress and intensity can be measured simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129458.XA CN109696263A (en) | 2019-02-21 | 2019-02-21 | A kind of device and test method for testing the existing stress of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129458.XA CN109696263A (en) | 2019-02-21 | 2019-02-21 | A kind of device and test method for testing the existing stress of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109696263A true CN109696263A (en) | 2019-04-30 |
Family
ID=66233486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910129458.XA Pending CN109696263A (en) | 2019-02-21 | 2019-02-21 | A kind of device and test method for testing the existing stress of concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109696263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414936A (en) * | 2020-11-10 | 2021-02-26 | 山东大学 | Tunnel mechanical characteristic detection system and method |
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|---|---|---|---|---|
| JPH08304191A (en) * | 1995-04-28 | 1996-11-22 | Sho Bond Constr Co Ltd | Method for measuring existinit stress of structure member |
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| JP2002081999A (en) * | 2000-09-05 | 2002-03-22 | Komiyama Kogyo:Kk | Method for measuring residual strain and residual stress, and stress release device therefor |
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| CN202255999U (en) * | 2011-07-30 | 2012-05-30 | 池州利锋金刚石工具有限公司 | Core sample filler |
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| CN105841853A (en) * | 2016-03-30 | 2016-08-10 | 广西大学 | Novel ring core-based device for testing existing stress of concrete |
| CN107367339A (en) * | 2017-07-07 | 2017-11-21 | 深圳市公路交通工程试验检测中心 | A kind of definitely strain detecting method and special strip style |
| CN209673268U (en) * | 2019-02-21 | 2019-11-22 | 广西大学 | A kind of device for testing the existing stress of concrete |
-
2019
- 2019-02-21 CN CN201910129458.XA patent/CN109696263A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08304191A (en) * | 1995-04-28 | 1996-11-22 | Sho Bond Constr Co Ltd | Method for measuring existinit stress of structure member |
| JP2001004463A (en) * | 1999-06-21 | 2001-01-12 | Taisei Corp | Method for measuring stress acting on structure |
| JP2002081999A (en) * | 2000-09-05 | 2002-03-22 | Komiyama Kogyo:Kk | Method for measuring residual strain and residual stress, and stress release device therefor |
| JP2004101322A (en) * | 2002-09-09 | 2004-04-02 | Zenitaka Corp | Method for measuring strain and current stress of concrete structural member |
| JP2005010122A (en) * | 2003-06-23 | 2005-01-13 | Kajima Corp | Method and apparatus for measuring stress by overcoring type stress analysis method |
| KR20080093616A (en) * | 2007-04-17 | 2008-10-22 | 한국시설안전공단 | Stress measurement techniques for the concrete structures according to measuring displacement due to stress-relief |
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| CN101581642A (en) * | 2009-06-11 | 2009-11-18 | 中国京冶工程技术有限公司 | Detection method of temperature shrinking stress of overlong concrete structure |
| CN102162357A (en) * | 2011-03-31 | 2011-08-24 | 中国矿业大学 | Method for testing in-situ internal stress of vertical shaft wall |
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| CN104729870A (en) * | 2015-04-02 | 2015-06-24 | 天津市市政工程研究院 | Existing-prestress detection method for concrete bridge structure |
| CN105841853A (en) * | 2016-03-30 | 2016-08-10 | 广西大学 | Novel ring core-based device for testing existing stress of concrete |
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| CN112414936A (en) * | 2020-11-10 | 2021-02-26 | 山东大学 | Tunnel mechanical characteristic detection system and method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190430 |