CN110512608A - Concrete anticracking apparatus and method based on distribution type fiber-optic - Google Patents
Concrete anticracking apparatus and method based on distribution type fiber-optic Download PDFInfo
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- CN110512608A CN110512608A CN201910878919.3A CN201910878919A CN110512608A CN 110512608 A CN110512608 A CN 110512608A CN 201910878919 A CN201910878919 A CN 201910878919A CN 110512608 A CN110512608 A CN 110512608A
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- 239000004567 concrete Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims description 118
- 239000011241 protective layer Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000005336 cracking Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011253 protective coating Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0082—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a rise in temperature, e.g. caused by an exothermic reaction
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
- G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
- G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
- G01K1/143—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations for measuring surface temperatures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
- G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
-
- 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
- G01L1/247—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 using distributed sensing elements, e.g. microcapsules
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The concrete anticracking apparatus and method based on distribution type fiber-optic that the present invention provides a kind of, the present invention can in real time, reliably acquire temperature and stress in concrete, real-time monitoring inside concrete stress variation, it is subsequent can be based on the temperature and the stress regulation and control inside concrete temperature difference in collected concrete, reduce concrete own temperature stress, it can be effectively prevent the crack generated due to temperature stress, improve construction quality and safety.
Description
Technical field
The concrete anticracking apparatus and method based on distribution type fiber-optic that the present invention relates to a kind of.
Background technique
Often it is related to mass concrete construction in modern architecture, such as high-rise building basis, large equipment base, water conservancy
Dam etc..Its main feature has that volume is big, surface coefficient is small, hydration heat of cement release is concentrated, internal quick heating etc..Work as coagulation
When native internal-external temperature difference is larger, concrete can be made to generate thermal cracking, influence structure safety and normal use.Mass concrete is split
The traditional method of seam control is to reduce hydration heat of concrete, fixed point thermometric, be laid with thermal insulation material etc., and disadvantage is that quality controls energy
Power is poor, comprehensively control concrete temperature difference scarce capacity, can not predict the damage of crack in advance and occurs etc..
Summary of the invention
The concrete anticracking apparatus and method based on distribution type fiber-optic that the purpose of the present invention is to provide a kind of.
To solve the above problems, the present invention provides a kind of concrete anticracking device based on distribution type fiber-optic, comprising:
It is arranged at intervals at more hot type distributed temperature measuring optical fiber of the nearly upper and lower surfaces of concrete；
It is arranged at intervals at the more distributed temperature measuring optical fiber at the intermediate position of the concrete；
It is arranged at intervals at the nearly upper and lower surfaces of the concrete and the more distributed survey ess-strain light at intermediate position
It is fine；
The DTS Acquisition Instrument being connect respectively with each hot type distributed temperature measuring optical fiber and distributed temperature measuring optical fiber；
The BOTDR Acquisition Instrument being connect respectively with each distributed survey ess-strain optical fiber.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, every hot type distributed temperature measuring
Optical fiber is U-shaped；Every distributed temperature measuring optical fiber is U-shaped；Every distributed survey ess-strain optical fiber is U-shaped.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, each hot type distributed temperature measuring
The mutual horizontal interval 500mm~1000mm of optical fiber, each hot type distributed temperature measuring optical fiber away from the lower surface of concrete 100mm~
150mm, or upper surface 100mm~150mm away from concrete.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, each distributed temperature measuring optical fiber phase
Mutual horizontal interval 500mm~1000mm, hot type distributed temperature measuring optical fiber are spaced apart with distributed temperature measuring optical fiber.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, each distributed survey ess-strain
Optical fiber, mutual horizontal space 500mm~1500mm, and the thickness layered arrangement according to the concrete.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, the survey ess-strain optical fiber with
Distributed temperature measuring optical fiber or hot type distributed temperature measuring optical fiber arranged for interval.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, the hot type distributed temperature measuring
Optical fiber includes temperature-measuring optical fiber and the first protective layer for being coated on outside the temperature-measuring optical fiber；
The distributed ess-strain optical fiber of surveying includes surveying ess-strain optical fiber and being coated on to survey outside ess-strain optical fiber
4th protective layer.
Further, in the concrete anticracking device above-mentioned based on distribution type fiber-optic, the distributed temperature measuring optical fiber packet
It includes:
Temperature-measuring optical fiber；
The protective coating being coated on outside the temperature-measuring optical fiber；
The heater strip being distributed in around the temperature-measuring optical fiber；
The second protective layer being coated on outside the protective coating and heater strip；
The metal armour being coated on outside second protective layer；
The third protective layer being coated on outside the metal armour
Another side according to the present invention, also provide a kind of agent on crack resistance of concrete cracking method using it is described in any of the above embodiments based on point
The concrete anticracking device of cloth optical fiber, which comprises
Intelligent comprehensive control system passes sequentially through the upper and lower surfaces of DTS Acquisition Instrument, distributed temperature measuring collecting fiber concrete
With the temperature of medium position；
When the temperature difference of the upper and lower surfaces of concrete and medium position is more than 5 DEG C, the control heating of intelligent comprehensive control system
Type distributed temperature measuring optical fiber heats the temperature difference region of concrete, while being added by hot type distributed temperature measuring optical fiber monitoring
Hot temperature is small by the upper and lower surfaces temperature and the central temperature temperature difference of hot type distributed temperature measuring optical fiber dynamic adjustment concrete
In 5 DEG C.
Further, in above-mentioned agent on crack resistance of concrete cracking method, the intelligent comprehensive control system passes sequentially through BOTDR acquisition
Instrument, the distributed stress for surveying ess-strain collecting fiber inside concrete, when the stress in inside concrete region is greater than setting
When value, corresponding alarm is issued.
Compared with prior art, the present invention can in real time, reliably acquire the temperature and stress in concrete, and real-time monitoring is mixed
Solidifying soil internal stress variation, it is subsequent can based on the temperature and the stress regulation and control inside concrete temperature difference in collected concrete,
Reduce concrete own temperature stress, the crack generated due to temperature stress can be effectively prevent, improve construction quality and safety
Property.
Detailed description of the invention
Fig. 1 is the fiber arrangement schematic diagram of the concrete anticracking device based on distribution type fiber-optic of one embodiment of the invention；
Fig. 2 is the section arrangement schematic diagram of the concrete anticracking device based on distribution type fiber-optic of one embodiment of the invention；
Fig. 3 is the monitoring system schematic of one embodiment of the invention；
Fig. 4 is the schematic diagram of the distributed temperature measuring optical fiber of one embodiment of the invention；
Fig. 5 is the schematic diagram of the heat type distributed temperature measuring optical fiber of one embodiment of the invention；
Fig. 6 is the distributed schematic diagram for surveying ess-strain optical fiber of one embodiment of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
As shown in Figure 1, the present invention provides a kind of concrete anticracking device based on distribution type fiber-optic, comprising:
It is arranged at intervals at more hot type distributed temperature measuring optical fiber of the nearly upper and lower surfaces of concrete；
It is arranged at intervals at the more distributed temperature measuring optical fiber at the intermediate position of the concrete；
Here, being different from hot type distributed temperature measuring optical fiber, distributed temperature measuring optical fiber here is that non-heated type is distributed
Temperature-measuring optical fiber；
It is arranged at intervals at the nearly upper and lower surfaces of the concrete and the more distributed survey ess-strain light at intermediate position
It is fine；
The DTS Acquisition Instrument being connect respectively with each hot type distributed temperature measuring optical fiber and distributed temperature measuring optical fiber；
The BOTDR Acquisition Instrument being connect respectively with each distributed survey ess-strain optical fiber.
Here, the present invention can in real time, reliably acquire temperature and stress in concrete, real-time monitoring inside concrete is answered
Power variation, it is subsequent concrete to be reduced based on the temperature and the stress regulation and control inside concrete temperature difference in collected concrete
Own temperature stress can effectively prevent the crack generated due to temperature stress, improve construction quality and safety.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, every hot type distributed temperature measuring
Optical fiber is U-shaped.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, every distributed temperature measuring optical fiber is in
U-shaped.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, every distributed survey ess-strain
Optical fiber is U-shaped.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, each hot type distributed temperature measuring
The mutual horizontal interval 500mm~1000mm of optical fiber, each hot type distributed temperature measuring optical fiber away from the lower surface of concrete 100mm~
150mm, or upper surface 100mm~150mm away from concrete.
Here, as shown in Figure 1, 2, each hot type distributed temperature measuring optical fiber is U-shaped, each hot type distributed temperature measuring
The mutual horizontal interval 500mm~1000mm of optical fiber, each hot type distributed temperature measuring optical fiber away from the lower surface of concrete 100mm~
150mm, or upper surface 100mm~150mm away from concrete.
Distributed temperature measuring fiber deployment measures center temperature when mass concrete hydration heat in the middle part of pre-cast concrete
Degree, hot type distributed temperature measuring optical fiber should be arranged in concrete upper surface, lower surface and temperature measuring type optical fiber and be spaced apart.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, each distributed temperature measuring optical fiber phase
Mutual horizontal interval 500mm~1000mm, hot type distributed temperature measuring optical fiber are spaced apart with distributed temperature measuring optical fiber.
Here, as shown in Figure 1, 2, laying reinforcing bar in mass concrete and being laid with optical fiber, each distributed temperature measuring light simultaneously
U-shaped, the mutual horizontal interval 500mm~1000mm of each distributed temperature measuring optical fiber of fibre is arranged in position among concrete.Cloth
If when it is ensured that fiber position fixes and sets eye-catching mark, it is ensured that shift position is not damaged in casting process.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, each distributed survey ess-strain
Optical fiber, mutual horizontal space 500mm~1500mm, and the thickness layered arrangement according to the concrete.
Here, as shown in Figure 1, 2, each survey ess-strain optical fiber is U-shaped, mutual horizontal space 500mm~1500mm,
According to the on-demand layered arrangement of practical concrete thickness.
In one embodiment of concrete anticracking device based on distribution type fiber-optic of the invention, the survey ess-strain optical fiber with
Distributed temperature measuring optical fiber or hot type distributed temperature measuring optical fiber arranged for interval.
Here, surveying ess-strain optical fiber and distributed temperature measuring optical fiber or hot type distributed temperature measuring optical fiber arranged for interval, In
Concrete middle part, upper surface, lower surface are evenly arranged.
As shown in figure 4, in concrete anticracking device one embodiment of the invention based on distribution type fiber-optic, the distribution
Temperature-measuring optical fiber includes temperature-measuring optical fiber 11 and the first protective layer 12 for being coated on outside the temperature-measuring optical fiber.
As shown in figure 5, in concrete anticracking device one embodiment of the invention based on distribution type fiber-optic, the hot type
Distributed temperature measuring optical fiber includes:
Temperature-measuring optical fiber 21；
The protective coating 22 being coated on outside the temperature-measuring optical fiber 21；
The heater strip 23 being distributed in around the temperature-measuring optical fiber 21；
The second protective layer 24 being coated on outside the protective coating 22 and heater strip 23；
The metal armour 25 being coated on outside second protective layer 24；
The third protective layer 26 being coated on outside the metal armour 25.
Here, distributed temperature measuring optical fiber of the invention makes heating efficiency under conditions of optical fiber is not influenced by extraneous factor
It is maximum and safely controllable.
As shown in fig. 6, in concrete anticracking device one embodiment of the invention based on distribution type fiber-optic, the distribution
Surveying ess-strain optical fiber includes the 4th protective layer 32 surveying ess-strain optical fiber 31 and being coated on outside survey ess-strain optical fiber 32.
As shown in figure 3, another side according to the present invention, also provides a kind of agent on crack resistance of concrete cracking method, it is based on dividing using above-mentioned
The concrete anticracking device of cloth optical fiber, which comprises
Intelligent comprehensive control system passes sequentially through the upper and lower surfaces of DTS Acquisition Instrument, distributed temperature measuring collecting fiber concrete
With the temperature of medium position；
When the temperature difference of the upper and lower surfaces of concrete and medium position is more than 5 DEG C, the control heating of intelligent comprehensive control system
Type distributed temperature measuring optical fiber heats the temperature difference region of concrete, while being added by hot type distributed temperature measuring optical fiber monitoring
Hot temperature is small by the upper and lower surfaces temperature and the central temperature temperature difference of hot type distributed temperature measuring optical fiber dynamic adjustment concrete
In 5 DEG C.
Here, monitoring concrete different zones temperature using based on DTS (temperature-measuring system of distributed fibers) Fiber Optic Pyrometer
Degree variation carries out temperature-compensating in time, comprising: DTS Acquisition Instrument, hot type distributed temperature measuring optical fiber, distributed temperature measuring optical fiber；
Ess-strain technology real-time monitoring inside concrete is surveyed based on BOTDR (Brillouin light time domain reflection technology) optical fiber to answer
Power variation, including BOTDR Acquisition Instrument, distributed survey ess-strain optical fiber；
In one embodiment of agent on crack resistance of concrete cracking method of the invention, further includes:
The intelligent comprehensive control system passes sequentially through BOTDR Acquisition Instrument, distributed survey ess-strain collecting fiber coagulation
Stress inside soil issues corresponding alarm when the stress in inside concrete region is greater than the set value.
Here, BOTDR host real-time monitoring inside concrete ess-strain changes, intelligent control system is sent the data to
System, when the stress in inside concrete region is greater than the set value (with specific reference to concrete anticracking standard), system issues corresponding
Alarm is to computer, and prompting operator to correspond to, inside concrete regional stress is excessive, and adopting an effective measure prevents stress into one
Step increases.
Intelligence based on DTS (temperature-measuring system of distributed fibers), BOTDR (Brillouin light time domain reflection technology) optical fiber technology
Complex control system, including integrated temperature monitoring and dynamic compensation function, real-time temperature difference monitoring feedback function, ess-strain monitoring
And warning function.
The solution of the present invention is more intelligent, can the Effective Regulation inside concrete temperature difference in real time, reduce concrete itself temperature
Stress is spent, can accomplish giving warning in advance for crack generation with real-time monitoring inside concrete stress variation.After concreting
Temperature collection, stress data are monitored in real time using pre-buried distribution type fiber-optic system, are then carried out intellectual analysis and are carried out in time
Temperature-compensating simultaneously shows stress large area, can effectively prevent due to temperature stress generate crack, improve construction quality and
Safety.
In conclusion the present invention has the advantage that
1, the temperature point of different zones inside mass concrete can accurately be measured comprehensively based on DTS distribution type fiber-optic technology
Cloth.
2, hot type distribution type fiber-optic technology quickly and effectively can carry out temperature-compensating heating to temperature difference large area.
3, hot type distribution type fiber-optic during heating can each position heating temperature of real-time monitoring concrete, and by comprehensive
Control system feedback dynamic adjustment heating temperature is closed, process safety is efficiently controllable.
4, mass concrete internal stress can be monitored in real time based on BODTR distribution type fiber-optic technology.
5, mass concrete is completed from maintenance is poured into, whole process by system to the inside concrete temperature difference and stress into
Row real time monitoring, dynamic regulation compensate temperature difference large area.
6, have harmful cracks warning function, once there is local stress to increase extremely, alarm can be made in advance, taken earlier
Effective measures control harmful cracks and generate.
7, optical fiber is cheap, does not influence vulnerable to extraneous factor, and spatial resolution is 5cm~10cm, temperature measurement accuracy reaches
0.3 DEG C, negligible for the structure effect of mass concrete, applicable elements are wide.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (10)
1. a kind of concrete anticracking device based on distribution type fiber-optic characterized by comprising
It is arranged at intervals at more hot type distributed temperature measuring optical fiber of the nearly upper and lower surfaces of concrete；
It is arranged at intervals at the more distributed temperature measuring optical fiber at the intermediate position of the concrete；
It is arranged at intervals at the nearly upper and lower surfaces of the concrete and the more distributed survey ess-strain optical fiber at intermediate position；
The DTS Acquisition Instrument being connect respectively with each hot type distributed temperature measuring optical fiber and distributed temperature measuring optical fiber；
The BOTDR Acquisition Instrument being connect respectively with each distributed survey ess-strain optical fiber.
2. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that every hot type point
Cloth temperature-measuring optical fiber is U-shaped；Every distributed temperature measuring optical fiber is U-shaped；Every distributed ess-strain optical fiber of surveying is in U-shaped
Type.
3. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that each hot type point
The mutual horizontal interval 500mm~1000mm of cloth temperature-measuring optical fiber, each following table of the hot type distributed temperature measuring optical fiber away from concrete
Face 100mm~150mm, or upper surface 100mm~150mm away from concrete.
4. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that each distributed survey
The warm mutual horizontal interval 500mm~1000mm of optical fiber, hot type distributed temperature measuring optical fiber are spaced apart with distributed temperature measuring optical fiber.
5. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that each distributed survey
Ess-strain optical fiber, mutual horizontal space 500mm~1500mm, and the thickness layered arrangement according to the concrete.
6. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that the survey stress is answered
Darkening fibre and distributed temperature measuring optical fiber or hot type distributed temperature measuring optical fiber arranged for interval.
7. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that the hot type point
Cloth temperature-measuring optical fiber includes temperature-measuring optical fiber and the first protective layer for being coated on outside the temperature-measuring optical fiber；
The distributed ess-strain optical fiber of surveying includes the 4th for surveying ess-strain optical fiber and being coated on outside survey ess-strain optical fiber
Protective layer.
8. the concrete anticracking device based on distribution type fiber-optic as described in claim 1, which is characterized in that the distributed survey
Warm optical fiber includes:
Temperature-measuring optical fiber；
The protective coating being coated on outside the temperature-measuring optical fiber；
The heater strip being distributed in around the temperature-measuring optical fiber；
The second protective layer being coated on outside the protective coating and heater strip；
The metal armour being coated on outside second protective layer；
The third protective layer being coated on outside the metal armour.
9. a kind of agent on crack resistance of concrete cracking method, which is characterized in that using as described in any one of claims 1 to 8 based on distribution
The concrete anticracking device of optical fiber, which comprises
Intelligent comprehensive control system passes sequentially through the upper and lower surfaces of DTS Acquisition Instrument, distributed temperature measuring collecting fiber concrete in
The temperature of portion position；
When the temperature difference of the upper and lower surfaces of concrete and medium position is more than 5 DEG C, intelligent comprehensive control system controls hot type point
Cloth temperature-measuring optical fiber heats the temperature difference region of concrete, while passing through hot type distributed temperature measuring optical fiber monitoring heating temperature
Degree, by the upper and lower surfaces temperature and the central temperature temperature difference of hot type distributed temperature measuring optical fiber dynamic adjustment concrete less than 5
℃。
10. agent on crack resistance of concrete cracking method as claimed in claim 9, which is characterized in that the intelligent comprehensive control system is successively led to
BOTDR Acquisition Instrument, the distributed stress for surveying ess-strain collecting fiber inside concrete are crossed, when answering for inside concrete region
When power is greater than the set value, corresponding alarm is issued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878919.3A CN110512608A (en) | 2019-09-18 | 2019-09-18 | Concrete anticracking apparatus and method based on distribution type fiber-optic |
Applications Claiming Priority (1)
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