CN109030561A - A kind of pumping of prostressed duct compactness detection device and detection method based on distributed fiberoptic sensor - Google Patents
A kind of pumping of prostressed duct compactness detection device and detection method based on distributed fiberoptic sensor Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000005086 pumping Methods 0.000 title claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000007547 defect Effects 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 8
- 230000002950 deficient Effects 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 26
- 210000005239 tubule Anatomy 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000007689 inspection Methods 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000013480 data collection Methods 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 238000001069 Raman spectroscopy Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 1
- 239000011513 prestressed concrete Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000253 optical time-domain reflectometry Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004861 thermometry Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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Abstract
A kind of pumping of prostressed duct compactness detection device and detection method based on distributed fiberoptic sensor, belongs to engineering structure detection technique field.The detection device combines sensor fibre with heater strip, is fabricated to sensor；Sensor is fixed on steel strand wires by line card, then steel strand wires are penetrated in prestress pipe, realizes sensor in prestress pipe along Cheng Bushe；In data acquisition, heater strip energization is heated by temperature-adjusting device, in prestress pipe at mud jacking defective locations temperature can with along journey other positions temperature have notable difference, pipeline is read using data acquisition instrument along journey temperature value and to be analyzed, it can judge the closely knit situation of pumping of prostressed duct, identify the parameters such as the position of mud jacking defect and length, the cross-sectional area of mud jacking defect.This detection device and detection method can realize seamless interfacing with existing prestressed concrete construction technique, have easy to operate, low-cost advantage.
Description
Technical field
The pumping of prostressed duct compactness detection device and inspection that the present invention relates to a kind of based on distributed fiberoptic sensor
Survey method belongs to engineering structure detection technique field, is specifically existed using the structure or component of utilizing prestressing force post tensioning method construction
After pumping of prostressed duct, a kind of its grouting result is evaluated using distributed fiberoptic sensor thermometry method.
Background technique
The construction method of prestressed concrete engineering is broadly divided into pre-tensioning system and two kinds of post stretching, and pre-tensioning system is suitable for across footpath
Lesser engineering；It applies more widely for post stretching, including long-span continuous beam bridge, continuous rigid frame and prestressed concrete
Cable-stayed bridge etc..Post-stressed concrete structure to be applied the pre-buried prestress pipe in prestressed position in construction,
After concreting terminates and reaches design strength, by prestress wire pass through prestress pipe and carry out tensioning (can also be first
Penetrate steel strand wires, after-pouring concrete), cement slurry protection steel strand wires are finally filled into prestress pipe, guarantee prestress steel
Twisted wire is in uncorruptible environment, and keeps steel strand wires integral with concrete binding.During practical slip casting, due to slurry
The position setting for matching unreasonable, gas vent and bleeding hole is improper etc., and often will lead to mud jacking, there are uncompacted phenomenons.
In the past few decades, because mud jacking leakiness, causes presstressed reinforcing steel to be corroded, entire concrete knot is in turn resulted in
The accident that structure collapses is not within minority.The Ynys-y-Gwas bridge in Britain south Wales is on December 4th, 1985 in the feelings for having no sign
The main reason for collapsing suddenly under condition, investigating discovery accident is that the bridge presstressed reinforcing steel is seriously rotten in concrete segment connecting portion
Erosion.In addition to this, there are also Belgian Melle Bridge bridges, the Bickton Meadows foot bridge and beauty of Hampshire, Britain
Lowe ' the s Motor Speedway foot bridge of state was because major accident occurred for mud jacking leakiness.Therefore, to prestress pipe
Mud jacking compactness detected very it is necessary to.
Existing pumping of prostressed duct compactness inspection method mainly has drilling core examination method, Impact echo, surpasses
Sound wave transmission method and Ground Penetrating Radar method etc..But inside the buried concrete structure of prestress pipe, and prestress pipe will
In managing cement and it is extraneous obstruct, therefore detected using these methods, will receive concrete layer thickness, around prestress pipe
The interference of reinforcing bar and prestress pipe itself material, it tends to be difficult to reach relatively good testing result, and mostly need to be to quilt
Geodesic structure carries out point by point scanning, and detection efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of pumping of prostressed duct compactness inspection based on distributed fiberoptic sensor
Hot type distributed fiberoptic sensor is laid in inside prestress pipe by device and detection method, is realized and is passed in control pipeline
The temperature of photosensitive fibre and the acquisition of temperature data, to achieve the purpose that assess pumping of prostressed duct compactness.
The technical solution adopted by the present invention is that: a kind of pumping of prostressed duct compactness based on distributed fiberoptic sensor
Detection device, it includes fibre optical sensor, temperature-adjusting device and detection data acquisition instrument, it further includes prestress pipe,
The fibre optical sensor uses and heater strip is combined to the hot type distributed fiberoptic sensor being fabricated with sensor fibre, will
Hot type distributed fiberoptic sensor is along prestress pipe along Cheng Bushe；The prestress pipe is embedded in prestressed concrete knot
The inside of structure, prestress pipe top are stretched out outside concrete, are answered in advance at interval of a distance arranging exhaust air hole, gas vent top
Arrange that an appropriate number of steel strand wires, line card are bonded at the top of steel strand wires at interval of a distance inside hydraulic piping, hot type distribution
Formula fibre optical sensor is fixed together by line card and steel strand wires, and is drawn out to outside concrete by gas vent, prestressed pipe
Other positions filling concrete slurry, the sensor fibre being drawn out in the hot type distributed fiberoptic sensor outside concrete inside road
It is connected with data acquisition instrument, heater strip is connected with temperature-adjusting device.
There are two types of type, the first seed types directly to twine in sensor fibre external spiral for the hot type distributed fiberoptic sensor
Around heater strip, it is fabricated to a kind of easy hot type distributed fiberoptic sensor, sensor fibre is placed in tubule by second of type
It is interior, heater strip then is wound in tubule external spiral, outermost layer wraps up plastic sheath, forms another hot type distribution type fiber-optic and passes
Sensor；The sensor fibre includes single mode and multimode sensor fibre, the type of sensor fibre, size and whether armouring needs root
It is selected according to the type for the hot type distributed fiberoptic sensor to be made；The heater strip includes the heating of carbon fiber and alloy
Silk, the type of heater strip, size, material, whether there is or not insulating sheaths need to be according to the hot type distributed fiberoptic sensor to be made
Type selection；The tubule is the tubule of polyfluortetraethylene pipe and other materials.
The prestress pipe includes plastic film capicitor and metal bellows.
The detection data acquisition instrument includes suitable for single mode and multimode sensor fibre based on Brillouin scattering, Raman
The various distribution type fiber-optic data acquisition instruments of scattering and Rayleigh scattering；The temperature-adjusting device includes to adjust heater strip fever
The pressure regulator of efficiency.
A kind of pumping of prostressed duct compactness inspection method based on distributed fiberoptic sensor is using following
Step:
Sensor fibre, is placed in tubule by the production of the first step, hot type distributed fiberoptic sensor first, then outside tubule
Spiral winding heater strip, outermost layer wrap up plastic sheath；
Second step, mold, stirrup installation fix prestress pipe, the gas vent at the top of prestressed pipeline；
Line card is bonded in steel according to setting interval using seccotine by the fixation of third step, hot type distributed fiberoptic sensor
At the top of twisted wire, hot type distributed fiberoptic sensor is fixed together by line card and steel strand wires, but to allow hot type to be distributed
Formula fibre optical sensor slides in line card；
The laying of 4th step, hot type distributed fiberoptic sensor twists the steel for being fixed with hot type distributed fiberoptic sensor
Line penetrates in prestress pipe, while hot type distributed fiberoptic sensor being drawn from gas vent；
The concrete of 5th step, casting prestressed pipeline external；
6th step, curing concrete, intensity reach 80% or more, and tension steel strand, sealing off and covering anchorage is protected；
7th step is pressed into cement slurry into prestress pipe；
8th step, cement slurry is conserved to final set in pipe, and heater strip is connect with temperature-adjusting device, and adjustment temperature adjusts dress
It sets to suitable gear, hot type distributed fiberoptic sensor is connect with data acquisition instrument, is ready for compactness inspection；
Hot type distributed fiberoptic sensor is heated in 9th step, temperature-adjusting device energization, and after a period of time, power-off makes
Hot type distributed fiberoptic sensor Temperature fall, hot type distribution type fiber-optic in this time of Usage data collection apparatus measures
The temperature data of sensor；
Hot type distributed fiberoptic sensor judges temperature number along the temperature data of journey during tenth step, analysis heating, cooling
Be the position of mud jacking defect according to obvious abnormal position, additionally by defective locations heating reach maximum temperature, reach highest
Temperature required time and heating, cooling rate, length, the cross-sectional area parameter of qualitative recognition mud jacking defect.
The hot type distributed fiberoptic sensor is temperature sensor.
The beneficial effects of the present invention are: this pumping of prostressed duct compactness inspection based on distributed fiberoptic sensor
Device and detection method, three kinds of production, laying and data collection and analysis including hot type distributed fiberoptic sensor etc.
Concrete measure；Sensor fibre is combined with heater strip, is fabricated to hot type distributed fiberoptic sensor, reaches control sense light
The purpose of fine surface temperature；Hot type distributed fiberoptic sensor is fixed on steel strand wires by line card, then steel strand wires are worn
Enter in prestress pipe, realizes hot type distributed fiberoptic sensor in prestress pipe along Cheng Bushe；Data acquisition
In, heater strip energization is heated by temperature-adjusting device, temperature can be with edge at mud jacking defective locations in prestress pipe
Temperature has notable difference at journey other positions, reads pipeline using data acquisition instrument and along journey temperature value and is analyzed
To judge the closely knit situation of pumping of prostressed duct, position and length, cross-sectional area of mud jacking defect of mud jacking defect etc. are identified
Parameter.This detection device and detection method can realize seamless interfacing with existing prestressed concrete construction technique, have
Easy to operate, low-cost advantage.
Detailed description of the invention
Fig. 1 is detection device vertical section and instrument connection schematic diagram.
Fig. 2 is detection device drawing in side sectional elevation.
Fig. 3 is hot type distributing optical fiber sensing and steel strand wires attachment device schematic diagram.
Fig. 4 is the first seed type hot type distributed fiberoptic sensor schematic diagram.
Fig. 5 is second of type hot type distributed fiberoptic sensor schematic diagram.
Fig. 6 is hot type distributed fiberoptic sensor along journey temperature data schematic diagram.
In figure: 1, sensor fibre, 2, heater strip, 3, hot type distributed fiberoptic sensor, 4, prestress pipe, 5, temperature
Regulating device, 6, data acquisition instrument, 7, gas vent, 8, concrete, 9, steel strand wires, 10, line card, 11, cement slurry, 12, tubule,
13, plastic sheath.
Specific embodiment
Fig. 1 to Fig. 5 illustrates a kind of pumping of prostressed duct compactness detection device based on distributed fiberoptic sensor
Schematic diagram.In figure, this pumping of prostressed duct compactness detection device based on distributed fiberoptic sensor includes that will heat
Silk 2 combines the hot type distributed fiberoptic sensor 3 being fabricated with sensor fibre 1, by hot type distributing optical fiber sensing
Device 3 is along prestress pipe 4 along the fixation device 5 of Cheng Bushe, hot type distributed fiberoptic sensor temperature-adjusting device 5 and detection
Data acquisition instrument 6.It is characterized in that, prestress pipe 4 is embedded in the inside of prestressed reinforced concrete construction, prestress pipe 4
Top is stretched out outside concrete eight, is arranged inside prestress pipe 4 at interval of a distance arranging exhaust air hole 7,7 top of gas vent
A certain number of steel strand wires 9, line card 10 are bonded in 9 top of steel strand wires, hot type distributing optical fiber sensing at interval of a distance
Device 3 is fixed together by line card 10 with steel strand wires 9, and is drawn out to outside concrete eight by gas vent 7, in prestress pipe 4
Portion's other positions filling concrete slurry, the sensor fibre 1 being drawn out in the hot type distributed fiberoptic sensor 3 outside concrete eight
It is connected with data acquisition instrument 6, heater strip 2 is connected with temperature-adjusting device 5.The hot type distributed fiberoptic sensor 3 has
Two types, the first seed type directly wind heater strip 2 in 1 external spiral of sensor fibre, and it is distributed to be fabricated to easy hot type
Fibre optical sensor, production method is simple, is suitable for artificial production, short-range structure detection, the production method of second of type
It is that sensor fibre 1 is placed in tubule 12 first, then winds heater strip 2 in 12 external spiral of tubule, outermost layer wraps up plastic protective
Set 13 forms hot type distributed fiberoptic sensor 3, and production method comparison system is conducive to produce in batches, is suitable for practical work
Journey long range structure detection, wherein tubule 12 is used to achieve the purpose that protect sensor fibre 1, and heater strip 2 has to sensor fibre 1
The effect of armouring enhancing protection and heating, plastic sheath 13 play protection and insulation, and the sensor fibre 1 includes various types of
The single mode and multimode sensor fibre of type, the type of sensor fibre 1, size (diameter, whether armouring) need to be according to being made
Hot type distributed fiberoptic sensor 3 type selection, the heater strip 2 include carbon fiber and alloy etc. it is various types of plus
Heated filament, type, the size (material, diameter, whether there is or not insulating sheaths) of heater strip 2 need to be according to the hot type distribution light to be made
The type of fiber sensor 3 selects, and the tubule 12 can be the tubule of polyfluortetraethylene pipe and other materials；The prestress pipe
4 include plastic film capicitor and metal bellows；The detection data acquisition instrument 6 includes being suitable for single mode and multimode sensor fibre
The 1 various distributions based on Brillouin scattering (BOTDA, BOTDR), Raman scattering (ROTDR) and Rayleigh scattering (OTDR) etc.
Fiber data acquisition instrument is connect when acquiring data with sensor fibre 1；The hot type distributed fiberoptic sensor temperature is adjusted
Device 5, pressure regulator or other devices including various adjustable 2 heating efficiencies of heater strip, connect use with heater strip 2, leads to
Adjustment gear is crossed, the accessible maximum temperature in 3 surface of hot type distributed fiberoptic sensor can be set.
This pumping of prostressed duct compactness inspection method based on distributed fiberoptic sensor uses the following steps:
Sensor fibre 1 is placed in tubule 12, then thin by the production of the first step, hot type distributed fiberoptic sensor 3 first
12 external spiral of pipe winds heater strip 2, and outermost layer wraps up plastic sheath 13, and wherein tubule 12 is used to reach protection sensor fibre 1
Purpose, heater strip 2 have the function of simultaneously to 1 armouring of sensor fibre enhance protection and heating, plastic sheath 13 rise protection and absolutely
The effect of edge；
Second step, mold, stirrup installation, fixed prestress pipe 4, the gas vent 7 at 4 top of prestressed pipeline；
Line card 10 is bonded in by the fixation of third step, hot type distributed fiberoptic sensor 3 using seccotine according to certain intervals
Hot type distributed fiberoptic sensor 3 is fixed together by line card 10 with steel strand wires 9, but to guarantee to add by 9 top of steel strand wires
Heat type distributed fiberoptic sensor 3 can slide in line card 10, in order to damage hot type when subsequent tension steel strand 9
Distributed fiberoptic sensor 3；
The laying of 4th step, hot type distributed fiberoptic sensor 3 will be fixed with the steel of hot type distributed fiberoptic sensor 3
Twisted wire 9 penetrates in prestress pipe 4, while hot type distributed fiberoptic sensor 3 being drawn from gas vent 7；
Concrete eight outside 5th step, casting prestressed pipeline 4；
6th step, maintenance to concrete eight intensity reach 80% or more, and tension steel strand 9, sealing off and covering anchorage is protected；
Cement slurry 11 is pressed into 7th step, prestress pipe 4；
In 8th step, pipe after the maintenance to final set of cement slurry 11, heater strip 2 is connect with temperature-adjusting device 5, adjustment temperature is adjusted
Hot type distributed fiberoptic sensor 3 connect with data acquisition instrument 6 to suitable gear, is ready for compactness by device 5
Detection；
Hot type distributed fiberoptic sensor 3 is heated in 9th step, the energization of temperature-adjusting device 5, after a period of time, power-off
Make 3 Temperature fall of hot type distributed fiberoptic sensor, it is distributed that Usage data collection instrument 6 measures hot type in this time
The temperature data of fibre optical sensor 3；
Hot type distributed fiberoptic sensor 3 judges temperature along the temperature data of journey during tenth step, analysis heating, cooling
Obvious abnormal 14 positions of data are the position of mud jacking defect, and the maximum temperature reached additionally by defective locations heating reaches
The time required to maximum temperature and heating, cooling rate, can qualitative recognition mud jacking defect the parameters such as length, cross-sectional area.
The hot type distributed fiberoptic sensor 3 is temperature sensor.
The hot type distributed fiberoptic sensor has by the way of by 2 spiral winding of heater strip to biography
Photosensitive fine 1 armouring enhancing protection and the effect for improving heating efficiency, reduce the outer diameter of hot type distributed fiberoptic sensor 3, separately
Outside, the heater strip (such as corronil heater strip) 3 for selecting suitable material may be implemented to add the efficient of long-distance sensing optical fiber 1
Heat.
Pumping of prostressed duct compactness detection device proposed by the invention and detection method, are heated by autonomous Design
Type distributed fiberoptic sensor is simultaneously laid in inside prestress pipe, and sensor fibre is along Cheng Wen degree after collection analysis heating
According to can accurately identify the closely knit situation of pumping of prostressed duct, solve that traditional detection method detection speed is slow, result precision is low
The problem of, effective guarantee is provided for construction of prestressed concrete structure.
Claims (6)
1. a kind of pumping of prostressed duct compactness detection device based on distributed fiberoptic sensor, it includes Fibre Optical Sensor
Device, temperature-adjusting device (5) and detection data acquisition instrument (6), which is characterized in that it further includes prestress pipe (4), described
Fibre optical sensor, which is used, combines the hot type distributed fiberoptic sensor being fabricated with sensor fibre (1) for heater strip (2)
(3), by hot type distributed fiberoptic sensor (3) along prestress pipe (4) along Cheng Bushe；The prestress pipe (4) is embedded
In the inside of prestressed reinforced concrete construction, prestress pipe (4) top is at interval of a distance arranging exhaust air hole (7), gas vent
(7) concrete (8) outside is stretched out on top, and an appropriate number of steel strand wires (9) are arranged inside prestress pipe (4), and line card (10) is every
It is spaced a distance and is bonded at the top of steel strand wires (9), hot type distributed fiberoptic sensor (3) passes through line card (10) and steel strand wires
(9) it is fixed together, and is drawn out to concrete (8) outside by gas vent (7), the internal other positions of prestress pipe (4) are filled out
Water-filling mud (11), be drawn out to sensor fibre (1) in the external hot type distributed fiberoptic sensor (3) of concrete (8) with
Data acquisition instrument (6) is connected, and heater strip (2) is connected with temperature-adjusting device (5).
2. a kind of pumping of prostressed duct compactness inspection dress based on distributed fiberoptic sensor according to claim 1
It sets, it is characterised in that: there are two types of types for the hot type distributed fiberoptic sensor (3), and the first seed type is directly in sense light
Fine (1) external spiral winding heater strip (2) is fabricated to a kind of easy hot type distributed fiberoptic sensor, and second of type will
Sensor fibre (1) is placed in tubule (12), then winds heater strip (2) in tubule (12) external spiral, outermost layer wraps up plastic protective
It covers (13), forms another hot type distributed fiberoptic sensor；The sensor fibre (1) includes single mode and multimode sense light
Fibre, the type of sensor fibre (1), size and whether armouring need to be according to the hot type distributed fiberoptic sensor to be made
(3) type selection；The heater strip (2) includes the heater strip of carbon fiber and alloy, type, the size, material of heater strip (2)
Matter, whether there is or not insulating sheaths to be selected according to the type for the hot type distributed fiberoptic sensor (3) to be made；The tubule
It (12) is the tubule of polyfluortetraethylene pipe and other materials.
3. a kind of pumping of prostressed duct compactness inspection dress based on distributed fiberoptic sensor according to claim 1
It sets, it is characterised in that: the prestress pipe (4) includes plastic film capicitor and metal bellows.
4. a kind of pumping of prostressed duct compactness inspection dress based on distributed fiberoptic sensor according to claim 1
It sets, it is characterised in that: the detection data acquisition instrument (6) includes suitable for single mode and multimode sensor fibre (1) based on cloth
In deep pool scattering, Raman scattering and Rayleigh scattering various distribution type fiber-optic data acquisition instruments；Temperature-adjusting device (5) packet
Containing the pressure regulator for adjusting heater strip (2) heating efficiency.
5. a kind of pumping of prostressed duct compactness inspection side based on distributed fiberoptic sensor according to claim 1
Method, it is characterised in that: use the following steps:
Sensor fibre (1) is placed in tubule (12), so by the production of the first step, hot type distributed fiberoptic sensor (3) first
Heater strip (2) are wound in tubule (12) external spiral afterwards, outermost layer wraps up plastic sheath (13)；
Second step, mold, stirrup installation are fixed prestress pipe (4), the gas vent (7) at the top of prestressed pipeline (4)；
The fixation of third step, hot type distributed fiberoptic sensor (3), it is using seccotine that line card (10) is viscous according to setting interval
It ties at the top of steel strand wires (9), hot type distributed fiberoptic sensor (3) is fixed on one by line card (10) and steel strand wires (9)
It rises, but hot type distributed fiberoptic sensor (3) to be allowed to slide in line card (10)；
The laying of 4th step, hot type distributed fiberoptic sensor (3) will be fixed with hot type distributed fiberoptic sensor (3)
Steel strand wires (9) penetrate in prestress pipe (4), while hot type distributed fiberoptic sensor (3) being drawn from gas vent (7)
Out；
The external concrete (8) of 5th step, casting prestressed pipeline (4)；
6th step, curing concrete (8), intensity reach 80% or more, and tension steel strand (9), sealing off and covering anchorage is protected；
7th step is pressed into cement slurry (11) into prestress pipe (4)；
8th step after cement slurry (11) maintenance to final set, heater strip (2) is connect with temperature-adjusting device (5), is adjusted in pipe
Hot type distributed fiberoptic sensor (3) is connect to suitable gear by temperature-adjusting device (5) with data acquisition instrument (6),
It is ready for compactness inspection；
Hot type distributed fiberoptic sensor (3) is heated in 9th step, temperature-adjusting device (5) energization, after a period of time,
Power-off makes hot type distributed fiberoptic sensor (3) Temperature fall, and Usage data collection instrument (6) measures heating in this time
The temperature data of type distributed fiberoptic sensor (3)；
Hot type distributed fiberoptic sensor (3) judges temperature along the temperature data of journey during tenth step, analysis heating, cooling
Degree is the position of mud jacking defect according to obvious abnormal position, and the maximum temperature that reaches additionally by defective locations heating reaches
Maximum temperature required time and heating, cooling rate, length, the cross-sectional area parameter of qualitative recognition mud jacking defect.
6. a kind of pumping of prostressed duct compactness inspection side based on distributed fiberoptic sensor according to claim 5
Method, it is characterised in that: the hot type distributed fiberoptic sensor (3) is temperature sensor.
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| CN201810743169.4A CN109030561B (en) | 2018-07-09 | 2018-07-09 | Prestressed pipeline grouting compactness detection device and method based on distributed optical fiber sensor |
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| CN201810743169.4A CN109030561B (en) | 2018-07-09 | 2018-07-09 | Prestressed pipeline grouting compactness detection device and method based on distributed optical fiber sensor |
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| CN109632961A (en) * | 2019-01-22 | 2019-04-16 | 铜仁学院 | A kind of novel method for nondestructive detection of prestressing force and its device |
| CN110579249A (en) * | 2019-09-17 | 2019-12-17 | 西北大学 | Co-doped multimode fiber bragg grating based hot-wire flow sensor and manufacturing method thereof |
| CN110696179A (en) * | 2019-10-22 | 2020-01-17 | 上海中兴思秸通讯有限公司 | Method for laying concrete sensing optical fiber |
| CN111351771A (en) * | 2020-03-09 | 2020-06-30 | 苏交科集团股份有限公司 | Prefabricated pier sleeve connection grouting compactness monitoring system and method |
| CN111795994A (en) * | 2020-04-30 | 2020-10-20 | 中山市精量光电子科技有限公司 | Plug-in fiber bragg grating water seepage monitoring sensor |
| CN115128122A (en) * | 2022-06-08 | 2022-09-30 | 中国电建集团华东勘测设计研究院有限公司 | Detection device and detection method for internal grouting defect of concrete-filled steel tube arch bridge |
| CN115990557A (en) * | 2023-03-15 | 2023-04-21 | 连云港市大正水泥制品有限公司 | Detection maintenance device for reinforced concrete drain pipe and application method thereof |
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