CN107218900B - A kind of PCCP strain testing method based on fiber grating strain detection technology - Google Patents
A kind of PCCP strain testing method based on fiber grating strain detection technology Download PDFInfo
- Publication number
- CN107218900B CN107218900B CN201710432262.9A CN201710432262A CN107218900B CN 107218900 B CN107218900 B CN 107218900B CN 201710432262 A CN201710432262 A CN 201710432262A CN 107218900 B CN107218900 B CN 107218900B
- Authority
- CN
- China
- Prior art keywords
- fiber grating
- steel cylinder
- grating strain
- fiber
- wall
- 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.)
- Expired - Fee Related
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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
Prestressed concrete cylinder pipe (PCCP) strain testing method based on fiber grating strain detection technology that the present invention relates to a kind of; include the following steps: S1: measuring point is laid; fiber Bragg grating strain sensor is laid on steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder outboard tube core concrete, compressor wire and protective layer mortar; using wide range patch type strain gauge; and cascaded fiber grating strain meter; wherein, the fiber grating strain meter on steel cylinder inside tube core concrete inner wall and steel cylinder outer wall realizes series connection by laying optical fiber lead；S2: fiber-optic wire route integrates, and whole fiber-optic wire ends is introduced into the terminal box of Prestressed concrete cylinder pipe (PCCP), carries out measurement circuit and integrates, and integrated fiber-optic wire extraction PCCP is external；S3: terminal box is lived in glue encapsulating, carries out water-proofing treatment.The present invention has the characteristics that electromagnetism interference, durability are good, precision is high.
Description
Technical field
The present invention relates to hydraulic engineering the field of test technology, and in particular to a kind of based on fiber grating strain detection technology
Prestressed concrete cylinder pipe (PCCP) strain testing method.
Background technique
Prestressed concrete cylinder pipe (PCCP pipe) is by concrete tube core, steel cylinder, compressor wire and protective layer mortar group
At.PCCP pipe have bearing capacity it is strong, it is substantially water-tight, be not easy that burn into fast and convenient can be installed, water passing capacity is strong, right
Ground has the advantages that good adaptability, shock resistance are strong, have accessory abundant and shape tube, in municipal works, nuclear power, water power
And it is used widely in the pressure water conveyer pipe engineering of long-distance large-caliber.
The intensity of PCCP pipe depends on the compressor wire being wrapped on tube core, and compressor wire produces on concrete tube core
Raw uniform prestressing force can be compensated for by the tensile stress of internal pressure and external load generation.
For the bearing mechanism and destructive characteristics under research PCCP inner pipe water pressure or external loads effect, need to manage PCCP
Carry out prototype test.Strain of each layer structure under internal pressure or external loads continuous action is managed to PCCP by test to connect
Continuous test obtains the test data of concrete tube core, protective layer mortar, steel cylinder and compressor wire under different load actions,
By furtheing investigate test data, grasps PCCP and manage the loaded response pattern of each layer structure under pressure, determine that tube body is each
Layer material cracking and yield load.
It is at present by being surveyed in steel cylinder, steel cylinder for Prestressed concrete cylinder pipe (PCCP) prototype test measuring technology
Tube core concrete, steel cylinder outboard tube core concrete, compressor wire, adhering resistance formula foil gauge carries out on protective layer mortar.So
And resistance strain plate is easy to damage during PCCP pipe manufactures, and have stability difference and easily occur zero float etc. can not gram
The defect of clothes.
Summary of the invention
To solve the deficiencies in the prior art, a kind of test method of PCCP pipe that durability is good is provided, the present invention provides
A kind of PCCP strain testing method based on fiber grating detection technology, includes the following steps:
S1: measuring point is laid, in steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder outboard tube core concrete appearance
Fiber Bragg grating strain sensor is laid on face, compressor wire and protective layer mortar, selects wide range patch type strain gauge,
And cascaded fiber grating strain meter, wherein the fiber grating strain on steel cylinder inside tube core concrete inner wall and steel cylinder outer wall
Meter realizes series connection by laying optical fiber lead；
S2: fiber-optic wire route is integrated, and whole fiber-optic wire ends is introduced into the terminal box of PCCP tube body, carries out
Fiber-optic wire route is integrated, and integrated fiber-optic wire extraction PCCP is external；
S3: terminal box is lived in glue encapsulating, carries out water-proofing treatment.
Wherein, in the step S1, the fiber grating strain meter takes four vertical sections, the circumferential method cloth laid
If.
Wherein, in the step S1, the tube core on the outside of the steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder
6-10 test section is respectively chosen on concrete, compressor wire and protective layer mortar, lays installation on each test section
Four fiber grating strain meters；Wherein, in the steel cylinder inside tube core concrete inner wall and each test section of steel cylinder outer wall
On also lay a fiber-optic wire, based on cascaded fiber grating strain.
Wherein, the fiber grating strain meter on each layer test section is laid in cruciform symmetry.
Wherein, it is described test section number be 7, be located at PCCP tube length 0-20%, 20%-35%m,
At 35%-45%m, 45%-60%, 60%-70%, 70%-90% and 90%-100%.
Wherein, laying optical fiber grating strain meter and optical fiber on the steel cylinder inside tube core concrete inner wall or steel cylinder outer wall
When lead, the step S1 includes:
S11: laying optical fiber grating strain meter is shown the need in steel cylinder inside tube core concrete inner wall or steel cylinder outer wall subscript
Test point and corresponding fiber-optic wire route；
S12: test point and corresponding fiber-optic wire route are polished smooth；
S13: use alcohol by test point and corresponding fiber-optic wire route wiped clean；
S14:, will be in one of transverse direction along steel cylinder inside tube core concrete inner wall or steel cylinder outer wall longitudinal direction
Fiber grating strain meter is fixed in dispensing in test point, then along the fixed fiber-optic wire of the same direction dispensing；
S15: gluing protection is carried out to the fiber grating strain meter and fiber-optic wire fixed；
S16: paper self-adhesive tape is pasted in the fiber grating strain meter and fiber-optic wire surface fixed；
After S17:12 hours, PCCP tube body is overturn, the behaviour of step S14- step S16 is carried out in another transverse direction
Make, to complete the cloth of fiber grating strain meter and fiber-optic wire on entire steel cylinder inside tube core concrete inner wall or steel cylinder outer wall
If.
Wherein, in laying optical fiber grating strain meter on the steel cylinder outer wall and fiber-optic wire, the step S1 further include:
S18: tail optical fiber protection processing welds the round steel pipe perpendicular to steel cylinder surface on the outside of steel cylinder, will be close to circular steel
Fiber-optic wire changing-over at pipe is linked into reserved protection outside steel cylinder at armoring lead wire.
Wherein, the laying optical fiber grating strain timing on the steel cylinder outboard tube core concrete and compressor wire, it is described
Step S1 includes:
S11: the test point of laying optical fiber grating strain meter is shown the need in steel cylinder outboard tube core concrete outer wall subscript；
S12: scheduled skylight is chiseled in test point position, removing mortar makes tube core coagulation on the outside of compressor wire and steel cylinder
Soil is exposed；
S13: exposed steel cylinder outboard tube core concrete and compressor wire surface are polished smooth；
S14: fiber grating strain meter is fitted in steel cylinder outboard tube core concrete and compressor wire surface；
S15: it smears resin and covers fiber grating strain meter；
S16: fiber grating strain meter is connected.
Wherein, the laying optical fiber grating strain timing on the protective layer mortar, the step S1 include:
S11: the test point of laying optical fiber grating strain meter is shown the need in the protective layer mortar outer wall subscript；
S12: protective layer mortar test point position is polished smooth；
S13: fiber grating strain meter is fitted in the protective layer mortar surface polished smooth；
S14: it smears resin and covers fiber grating strain meter；
S15: fiber grating strain meter is connected.
Wherein, further includes:
S4: the laying optical fiber grating osmometer on steel cylinder inside tube core concrete inner wall, to realize hydraulic pressure of satisfying in pipe simultaneously
Power test.
PCCP strain testing method provided by the invention based on fiber grating strain is with fiber grating sensing technology
Basis has the characteristics that electromagnetism interference, durability are good, precision is high.
Detailed description of the invention
Fig. 1 a: the transverse sectional view that tube body fiber grating strain meter of the invention is laid；
Fig. 1 b: the longitudinal cross-section schematic diagram that tube body fiber grating strain meter of the invention is laid；
Fig. 1 c: the circumferential expanded schematic diagram that tube body fiber grating strain meter of the invention is laid；
Fig. 2 a: the integrated transverse sectional view of tube body fiber grating strain measurement line route of the invention；
Fig. 2 b: the integrated longitudinal cross-section schematic diagram of tube body fiber grating strain measurement line route of the invention；
Fig. 2 c: the integrated circumferential expanded schematic diagram of tube body fiber grating strain measurement line route of the invention；
Fig. 3: fiber-optic wire route of the invention integrates test schematic diagram；
Fig. 4: steel cylinder fiber grating strain meter layout diagram of the invention.
Description of symbols
1 fiber grating strain meter
2 fiber-optic wires
3 terminal boxes
4 flange holes
5 multicore communications optical cables
6 optical fiber demodulating apparatus
7 steel pipes.
Specific embodiment
In order to have further understanding to technical solution of the present invention and beneficial effect, attached drawing is cooperated to be described in detail below
Technical solution of the present invention and its beneficial effect of generation.
Fig. 1-Fig. 2 is respectively PCCP tube body fiber grating strain meter and tube body fiber grating strain measurement line line of the invention
Road integrates schematic diagram, wherein Fig. 1 a is the transverse sectional view that tube body fiber grating strain meter of the invention is laid, and Fig. 1 b is
The longitudinal cross-section schematic diagram that tube body fiber grating strain meter of the invention is laid, Fig. 1 c are tube body fiber grating strain of the invention
Count the circumferential expanded schematic diagram laid；Fig. 2 a is that tube body fiber grating strain of the invention measures the integrated transversal cross-section of line route
Schematic diagram, Fig. 2 b are that tube body fiber grating strain of the invention measures the integrated longitudinal cross-section schematic diagram of line route, and Fig. 2 c is this
The integrated circumferential expanded schematic diagram of the tube body fiber grating strain measurement line route of invention.
As Figure 1-Figure 2, the present invention provides a kind of PCCP strain testings based on fiber grating strain detection technology
Method includes the following steps:
S1: measuring point is laid, and in steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder outboard tube core concrete, is in advance answered
Fiber grating strain meter 1, and cascaded fiber grating strain meter 1 are laid on power steel wire and protective layer mortar, wherein steel cylinder
Fiber grating strain meter 1 on inside tube core concrete inner wall and steel cylinder outer wall realizes series connection by laying optical fiber lead 2；
S2: fiber-optic wire route is integrated, and whole 2 ends of fiber-optic wire is introduced into the terminal box 3 of PCCP tube body, into
Row fiber-optic wire route is integrated, and the integrated extraction of fiber-optic wire 2 PCCP is external；
S3: terminal box 3 is lived in glue encapsulating, carries out water-proofing treatment.
Therefore, the present invention is for Prestressed concrete cylinder pipe (PCCP pipe) prototype test, the new survey of one kind of proposition
Examination technology.New technology be based on fiber grating (FBG) sensing technology, by steel cylinder inside tube core concrete inner wall, steel cylinder outer wall,
Fiber grating strain meter 1 is implanted on steel cylinder outboard tube core concrete, compressor wire and protective layer mortar, using fiber grating
The continual acquisition strain data of (FBG) demodulator realizes the test to straining during the prototype tube internal pressure bearing capacity of the scene PCCP.Light
Fine grating is to induce its light sensitivity that its refractive index generating period is made permanently to change manufactured width using laser explosure doped fiber
Narrow filter, fiber grating as it is a kind of by carrier, optical fiber of light be the New Sensing Technology of medium, have electromagnetism interference,
The features such as durability is good, precision is high is very suitable to the test of PCCP prototype test.
The present invention in the specific implementation, in combination with PCCP load-bearing deformation, fracture of wire deformation etc. various workings during
PCCP structural strain data select a variety of different types of fiber gratings to answer in conjunction with the material characteristics of structural bodies various in PCCP
Become meter, be implanted in PCCP, test the strain size of each structural body of PCCP, such as can choose bare optical fibers and bare optical gratings strain gauge,
Diameter is 0.125mm, very thin small, is easily implantable, and intensity can be increased by smearing epoxide-resin glue on it, improve survival rate and
Measurement accuracy also can choose as other fiber grating strain meters, and the present invention is without restriction.
It should be noted that Fig. 1-schematic diagram shown in Fig. 2 of the present invention, is the institute by taking tube length is the PCCP of 6m as an example
The test section of selection is located at 0.75m, 1.75m, 2.5m, 3.0m, 3.5m, 4.25m and 5.25m of concrete tube body,
But in the specific implementation, it is not limited with this numerical value.
Fig. 3 is that fibre circuit integration testing schematic diagram of the invention can lead to as shown, the present invention is in the specific implementation
Multicore communications optical cable 5 is crossed by 2 welding of fiber-optic wire in terminal box 3 and connects circuit, is reserved from concrete tube body upper top cover
Flange hole 4 draws multicore communications optical cable 5, to connect with corresponding optical fiber demodulating apparatus 6.
The present invention lives terminal box 3 in the specific implementation, using epoxide-resin glue encapsulating, to carry out water-proofing treatment.
Preferably, please continue to refer to shown in Fig. 1-Fig. 2, in the step S1, the fiber grating strain meter 1 takes four
Vertical section, the circumferential method laid are laid.
Preferably, please continue to refer to shown in Fig. 1-Fig. 2, in the step S1, in the steel cylinder inside tube core concrete
6-10 are respectively chosen on wall, steel cylinder outer wall, steel cylinder outboard tube core concrete, compressor wire and protective layer mortar (with 7 in figure
For a) section is tested, four fiber grating strain meters 1 of installation are laid on each test section；Wherein, on the inside of the steel cylinder
A fiber-optic wire 2 is also laid on each test section of tube core concrete inner wall and steel cylinder outer wall, is used for cascaded fiber grating
Strain gauge 1.
Preferably, please continue to refer to shown in Fig. 1-Fig. 2, the fiber grating strain meter 1 on each layer test section is in ten
Word is symmetrically laid, that is, the fiber grating strain meter 1 on each layer test section is on four vertical sections along horizontal vertical cross pair
The mode of title is laid, on the direction around concrete tube body, four fiber grating strain meters 1 be located at 0 °, 90 °, 180 °,
At 270 ° of positions.
Preferably, the number of the test section is 7, is located at 0-20%, 20%-35% of pipe of concrete body length
M, at 35%-45%m, 45%-60%, 60%-70%, 70%-90% and 90%-100%.
When it is implemented, the laying optical fiber grating strain meter on the steel cylinder inside tube core concrete inner wall or steel cylinder outer wall
1 and when fiber-optic wire 2, the step S1 includes:
S11: laying optical fiber grating strain meter 1 is shown the need in steel cylinder inside tube core concrete inner wall or steel cylinder outer wall subscript
Test point and corresponding fiber-optic wire route；
S12: test point and corresponding fiber-optic wire route are polished smooth；Hand electric polisher progress can be used；For
The concrete tube body of a length of 6m, such as width about 5mm can be polished on steel cylinder outer wall, it is about the shiny surface of 6cm, so as to the later period
Fixed fiber grating strain meter 1；
S13: it using alcohol by test point and corresponding fiber-optic wire route wiped clean, influences to lay to avoid greasy dirt；
S14:, will be in one of transverse direction along steel cylinder inside tube core concrete inner wall or steel cylinder outer wall longitudinal direction
Fiber grating strain meter 1 is fixed in dispensing in test point, then along the fixed fiber-optic wire 2 of the same direction dispensing；(according to design side
Every fiber-optic wire route can have been inscribed in advance fiber grating string by case, guarantee the quantity of every fiber-optic wire line test point
It is certain with distance)；
In this step, can pass through for the fixation of fiber grating strain meter 1 in steel cylinder inside tube core concrete inner wall
Fiber grating strain meter 1 is fixed on steel cylinder inside tube core concrete inner wall by Instant cement；In steel cylinder outer wall, can fiber grating answer
Become meter 1 to be laid in polishing point, and is fixed on steel cylinder outer wall in terms of fiber grating strain 1 in the way of " fixed point " with electric welding machine
On；And it is directed to the fixation of fiber-optic wire 2, it can be realized by Instant cement；
S15: gluing protection is carried out to the fiber grating strain meter 1 and fiber-optic wire 2 fixed；
Specifically can by epoxide-resin glue by " paste " mode comprehensively by the fiber grating strain fixed in terms of 1 and optical fiber draw
Line 2 is covered comprehensively, reuses hair drier thermalization colloid, smears homogeneous colloids using hairbrush；
S16: paper self-adhesive tape is pasted in the fiber grating strain meter 1 and 2 surface of fiber-optic wire fixed；That is, by paper self-adhesive tape
It pastes in epoxy resin surface, avoids epoxy resin flows；
After S17:12 hours, PCCP tube body is overturn, the behaviour of step S14- step S16 is carried out in another transverse direction
Make, to complete fiber grating strain meter 1 and fiber-optic wire 2 on entire steel cylinder inside tube core concrete inner wall or steel cylinder outer wall
It lays.
Preferably, it please refers to shown in Fig. 4, the stereochemical structure signal laid for steel cylinder fiber grating strain meter of the invention
Figure, in laying optical fiber grating strain meter 1 on the steel cylinder outer wall and fiber-optic wire 2, the step S1 further include:
S18: tail optical fiber protection processing welds the round steel pipe 7 perpendicular to steel cylinder surface on the outside of steel cylinder, will be close to circular steel
2 changing-over of fiber-optic wire that (may be selected at distance about 10cm) at pipe 7 is linked into reserved protection outside steel cylinder at armoring lead wire, with
It avoids tube core concrete (including steel cylinder inside tube core concrete and steel cylinder outboard tube core concrete) from pouring and destroys fiber-optic wire 2.
When it is implemented, the laying optical fiber grating strain meter 1 on the steel cylinder outboard tube core concrete and compressor wire
When, the step S1 includes:
S11: the test point of laying optical fiber grating strain meter 1 is shown the need in steel cylinder outboard tube core concrete outer wall subscript；
S12: scheduled skylight (such as can be 10cm for length and width) be chiseled in test point position, removing mortar makes pre- answer
Power steel wire and steel cylinder outboard tube core concrete are exposed；
S13: exposed steel cylinder outboard tube core concrete and compressor wire surface are polished smooth；
S14: fiber grating strain meter 1 is fitted in steel cylinder outboard tube core concrete and compressor wire surface；
S15: it smears resin and covers fiber grating strain meter 1；In the present invention, epoxy resin may be selected, and smear uniform；
S16: fiber grating strain meter 1 is connected.
The present invention in the specific implementation, can be by heat sealing machine by the fiber grating strain meter 1 of laying in the step S16
Circumferential direction is connected into 3-4 route and is tested.
Protective layer mortar is in PCCP outermost layer, and tube core is mixed on the outside of the installation technics and steel cylinder of fiber grating strain meter 1
Solidifying soil and compressor wire are consistent, that is, in laying optical fiber grating strain meter 1 on the protective layer mortar, the step
S1 includes:
S11: the test point of laying optical fiber grating strain meter 1 is shown the need in the protective layer mortar outer wall subscript；
S12: protective layer mortar test point position is polished smooth；
S13: fiber grating strain meter is fitted in the protective layer mortar surface polished smooth；
S14: it smears resin and covers fiber grating strain meter 1；
S15: fiber grating strain meter 1 is connected.
The present invention in the specific implementation, can also on steel cylinder inside tube core concrete inner wall laying optical fiber grating osmometer,
To realize water pressure test of satisfying in pipe simultaneously.
Specifically, 2-3 fiber bragg grating osmometer can be laid in steel cylinder inside tube core concrete inner wall, full water in pipe is realized
Pressure real-time testing.Using epoxide-resin glue, osmometer is pasted to the upper, middle and lower position for being fixed on steel cylinder inside tube core concrete
Place, to test PCCP internal water pressure size.
Similar to fiber grating strain meter 1, fiber bragg grating osmometer can also be connected in series, and finally by fiber grating osmotic pressure
Meter lead is introduced into terminal box 3, and it is integrated to carry out route.
It is provided by the invention based on fiber grating strain 1 PCCP strain testing method, with fiber grating sensing technology
Based on, have the characteristics that electromagnetism interference, durability are good, precision is high.
Although the present invention is illustrated using above-mentioned preferred embodiment, the protection model that however, it is not to limit the invention
It encloses, anyone skilled in the art are not departing within the spirit and scope of the present invention, and opposite above-described embodiment carries out various changes
It is dynamic still to belong to the range that the present invention is protected with modification, therefore protection scope of the present invention subjects to the definition of the claims.
Claims (9)
1. a kind of PCCP strain testing method based on fiber grating strain detection technology, which is characterized in that include the following steps:
S1: measuring point is laid, in steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder outboard tube core concrete, prestress steel
Fiber Bragg grating strain sensor is laid on silk and protective layer mortar, selects wide range patch type strain gauge, and light of connecting
Fiber grating strain meter, wherein the fiber grating strain meter on steel cylinder inside tube core concrete inner wall and steel cylinder outer wall passes through laying
Fiber-optic wire realizes series connection,
Specifically, laying optical fiber grating strain meter and optical fiber draw on the steel cylinder inside tube core concrete inner wall or steel cylinder outer wall
When line, the step S1 includes:
S11: the survey of laying optical fiber grating strain meter is shown the need in steel cylinder inside tube core concrete inner wall or steel cylinder outer wall subscript
Pilot and corresponding fiber-optic wire route；
S12: test point and corresponding fiber-optic wire route are polished smooth；
S13: use alcohol by test point and corresponding fiber-optic wire route wiped clean；
S14: along steel cylinder inside tube core concrete inner wall or steel cylinder outer wall longitudinal direction, by the test in one of transverse direction
Fiber grating strain meter is fixed in dispensing on point, then along the fixed fiber-optic wire of the same direction dispensing；
S15: gluing protection is carried out to the fiber grating strain meter and fiber-optic wire fixed；
S16: paper self-adhesive tape is pasted in the fiber grating strain meter and fiber-optic wire surface fixed；
After S17:12 hours, PCCP tube body is overturn, the operation of step S14- step S16 is carried out in another transverse direction, from
And complete the laying of fiber grating strain meter and fiber-optic wire on entire steel cylinder inside tube core concrete inner wall or steel cylinder outer wall；
S2: fiber-optic wire route is integrated, and whole fiber-optic wire ends is introduced into the terminal box of PCCP, carries out fiber-optic wire
Route is integrated, and integrated fiber-optic wire extraction PCCP is external；
S3: terminal box is lived in glue encapsulating, carries out water-proofing treatment.
2. as described in claim 1 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
In the step S1, the fiber grating strain meter takes four vertical sections, the circumferential method laid to lay.
3. as claimed in claim 2 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
In the step S1, in the steel cylinder inside tube core concrete inner wall, steel cylinder outer wall, steel cylinder outboard tube core concrete, prestressing force
6-10 test section is respectively chosen on steel wire and protective layer mortar, and four fiber gratings of installation are laid on each test section and are answered
Become meter；Wherein, a light is also laid on each test section of the steel cylinder inside tube core concrete inner wall and steel cylinder outer wall
Fine lead, based on cascaded fiber grating strain.
4. as claimed in claim 3 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
The fiber grating strain meter on each layer test section is laid in cruciform symmetry.
5. as claimed in claim 3 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
The number of the test section is 7, is located at 0-20%, 20%-35%m, 35%-45%m, 45%- of PCCP tube length
60%, at 60%-70%, 70%-90% and 90%-100%.
6. as described in claim 1 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
In laying optical fiber grating strain meter on the steel cylinder outer wall and fiber-optic wire, the step S1 further include:
S18: tail optical fiber protection processing is welded the round steel pipe perpendicular to steel cylinder surface on the outside of steel cylinder, be will be close at round steel pipe
Fiber-optic wire changing-over at armoring lead wire, be linked into reserved protection outside steel cylinder.
7. as described in claim 1 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
The laying optical fiber grating strain timing on the steel cylinder outboard tube core concrete and compressor wire, the step S1 include:
S11: the test point of laying optical fiber grating strain meter is shown the need in steel cylinder outboard tube core concrete outer wall subscript；
S12: scheduled skylight is chiseled on test point surface, removing mortar makes outside compressor wire and steel cylinder outboard tube core concrete
Dew；
S13: exposed steel cylinder outboard tube core concrete and compressor wire surface are polished smooth；
S14: fiber grating strain meter is fitted in steel cylinder outboard tube core concrete and compressor wire surface；
S15: it smears resin and covers fiber grating strain meter；
S16: fiber grating strain meter is connected.
8. as described in claim 1 based on the PCCP strain testing method of fiber grating strain detection technology, it is characterised in that:
The laying optical fiber grating strain timing on the protective layer mortar, the step S1 include:
S11: the test point of laying optical fiber grating strain meter is shown the need in the protective layer mortar outer wall subscript；
S12: it is polished smooth at protective layer mortar test point；
S13: fiber grating strain meter is fitted in the protective layer mortar surface polished smooth；
S14: it smears resin and covers fiber grating strain meter；
S15: fiber grating strain meter is connected.
9. as described in claim 1 based on the PCCP strain testing method of fiber grating strain detection technology, which is characterized in that
Further include:
S4: the laying optical fiber grating osmometer on steel cylinder inside tube core concrete inner wall, to realize that water pressure of satisfying in pipe is surveyed simultaneously
Examination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432262.9A CN107218900B (en) | 2017-06-09 | 2017-06-09 | A kind of PCCP strain testing method based on fiber grating strain detection technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432262.9A CN107218900B (en) | 2017-06-09 | 2017-06-09 | A kind of PCCP strain testing method based on fiber grating strain detection technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107218900A CN107218900A (en) | 2017-09-29 |
| CN107218900B true CN107218900B (en) | 2019-10-11 |
Family
ID=59947351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710432262.9A Expired - Fee Related CN107218900B (en) | 2017-06-09 | 2017-06-09 | A kind of PCCP strain testing method based on fiber grating strain detection technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107218900B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027436B (en) * | 2018-09-13 | 2021-07-27 | 上海万朗水务科技集团有限公司 | Intelligent pipeline and manufacturing method thereof |
| CN109443231B (en) * | 2018-12-22 | 2021-05-28 | 中国地质大学（武汉） | Stress-free meter based on optical fiber sensing |
| CN111521126B (en) * | 2020-04-28 | 2022-01-28 | 兰州大学 | Fiber grating sensing monitoring method for three-dimensional reconstruction of submarine pipeline |
| CN111912338B (en) * | 2020-06-29 | 2021-05-14 | 山西大学 | Displacement measurement device and method based on electromagnetic induction transparent atomic grating |
| CN113124770A (en) * | 2021-04-23 | 2021-07-16 | 贵州桥梁建设集团有限责任公司 | Concrete filled steel tube debonding and empty comprehensive judgment method based on real-time monitoring data |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202795684U (en) * | 2012-08-31 | 2013-03-13 | 天津市誉航润铭科技发展有限公司 | Operation security early-warning system of single-host distributed optical fiber prestressed pipeline |
| CN203686594U (en) * | 2014-01-14 | 2014-07-02 | 天津市誉航润铭科技发展有限公司 | Lining installation pipe for laying pipeline optical fiber |
| CN104374433A (en) * | 2014-12-12 | 2015-02-25 | 东南大学 | Tunnel structure monitoring system and tunnel structure monitoring method based on distributed long-gauge fiber bragg grating |
| CN104613885A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Tunnel pipeline monitoring and early warning system |
| CN204514373U (en) * | 2015-03-17 | 2015-07-29 | 中国电建集团昆明勘测设计研究院有限公司 | The dynamic monitoring system of the syndeton of a kind of concrete dam and earth and rockfill dam |
-
2017
- 2017-06-09 CN CN201710432262.9A patent/CN107218900B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202795684U (en) * | 2012-08-31 | 2013-03-13 | 天津市誉航润铭科技发展有限公司 | Operation security early-warning system of single-host distributed optical fiber prestressed pipeline |
| CN104613885A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Tunnel pipeline monitoring and early warning system |
| CN203686594U (en) * | 2014-01-14 | 2014-07-02 | 天津市誉航润铭科技发展有限公司 | Lining installation pipe for laying pipeline optical fiber |
| CN104374433A (en) * | 2014-12-12 | 2015-02-25 | 东南大学 | Tunnel structure monitoring system and tunnel structure monitoring method based on distributed long-gauge fiber bragg grating |
| CN204514373U (en) * | 2015-03-17 | 2015-07-29 | 中国电建集团昆明勘测设计研究院有限公司 | The dynamic monitoring system of the syndeton of a kind of concrete dam and earth and rockfill dam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107218900A (en) | 2017-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107218900B (en) | A kind of PCCP strain testing method based on fiber grating strain detection technology | |
| CN101858796B (en) | Seawater temperature profile measurement method based on fiber grating principle | |
| CN103669429B (en) | Based on the circular solids concrete pile pile strain monitoring method of FBG sensor | |
| CN201765351U (en) | Seawater temperature profile measuring optical cable based on FBG (fiber bragg grating) principle | |
| CN102735996A (en) | Exact locating method for fault points of submarine cable | |
| CN107121158B (en) | A kind of internal enclosed cantilever beam fiber-optic grating sensor | |
| CN201780103U (en) | Long-gauge optical fiber sensor for bending deformation measurement | |
| CN109655007A (en) | A kind of interior pipe inner concrete deformation monitoring method being perfused of grand bridge tubular arch | |
| CN105890829B (en) | A kind of device and test method of comparison tunnel force-measuring locking foot anchor tube test performance | |
| CN103323385A (en) | Fiber anchor pole corrosion sensor | |
| CN108612058B (en) | Concrete dam distributed temperature measurement optical fiber double-strand Z-shaped through warehouse burying construction method | |
| CN101625273B (en) | Fiber bragg grating osmometer | |
| CN102023061A (en) | Double-channel Brillouin optical fiber cable sensor | |
| CN109300605A (en) | Wisdom cable | |
| CN107558508A (en) | A kind of method that the monitoring of friction pile solidification stages hydration heat temperature is carried out based on BOTDA distributed optical fiber temperature measurements technology | |
| CN203259452U (en) | Fiber anchor rod corrosion sensor | |
| CN2706739Y (en) | Pre-stretching optical fiber raster big-scalar range strain sensor | |
| CN209087448U (en) | Wisdom cable | |
| Weng et al. | Application of fiber bragg grating strain sensors to a centrifuge model of a jacked pile in collapsible loess | |
| CN208254423U (en) | A kind of monitoring concrete entirety freeze thawing expansion strain sensor | |
| CN101923057B (en) | BOTDR (Brillouin Optical Time-Domain Reflectometer) fiber optical corrosive sensor | |
| CN103774702B (en) | Based on the cast-in-place X-type concrete pile pile strain monitoring method of FBG sensor | |
| CN209310749U (en) | A kind of monitoring concrete entirety freeze thawing expansion strain sensor | |
| CN105091920A (en) | Clustered fiber Bragg grating sensor | |
| CN202720372U (en) | Tight sleeve fiber bragg grating string sensing fiber cable |
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: Dou Tiesheng Inventor after: Wang Dongli Inventor after: Liu Jiangning Inventor after: Mu Peng Inventor after: Sang Liang Inventor after: Zhao Xiaofang Inventor after: Sun Yuelin Inventor after: Li Rong Inventor after: Feng Qi Inventor after: Dong Xiaonong Inventor after: Zhao Xiaolu Inventor after: Xia Shifa Inventor after: Yan Jiaqi Inventor after: Wu Hongxu Inventor after: Chen Xin Inventor after: Li Shouhui Inventor after: Shi Weixin Inventor after: Yang Jinxin Inventor after: Zhang Qi Inventor after: Cheng Bingqing Inventor after: Hu He Inventor after: Zhao Lijun Inventor after: Lv Yisheng Inventor before: Dou Tiesheng Inventor before: Zhang Qi Inventor before: Wang Jingjing Inventor before: Wu Hongxu Inventor before: Liu Jiangning Inventor before: Sun Yuelin Inventor before: Hu He Inventor before: Cheng Bingqing Inventor before: Li Shouhui Inventor before: Xia Shifa Inventor before: Shi Weixin Inventor before: Feng Qi Inventor before: Yang Jinxin Inventor before: Mu Peng Inventor before: Zheng Yanxia Inventor before: Wang Dongli Inventor before: Li Rong |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191011 Termination date: 20200609 |