CN108802188A - Grouting fullness detection method and system based on sleeve surface excitation - Google Patents
Grouting fullness detection method and system based on sleeve surface excitation Download PDFInfo
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- CN108802188A CN108802188A CN201810878464.0A CN201810878464A CN108802188A CN 108802188 A CN108802188 A CN 108802188A CN 201810878464 A CN201810878464 A CN 201810878464A CN 108802188 A CN108802188 A CN 108802188A
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 230000005284 excitation Effects 0.000 title abstract description 4
- 238000007689 inspection Methods 0.000 claims abstract description 47
- 230000001133 acceleration Effects 0.000 claims abstract description 29
- 238000004458 analytical method Methods 0.000 claims abstract description 14
- 230000007547 defect Effects 0.000 claims abstract description 7
- 239000011440 grout Substances 0.000 claims description 76
- 235000013336 milk Nutrition 0.000 claims description 13
- 239000008267 milk Substances 0.000 claims description 13
- 210000004080 milk Anatomy 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000005266 casting Methods 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
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- 238000012360 testing method Methods 0.000 abstract description 12
- 230000004044 response Effects 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 21
- 238000010276 construction Methods 0.000 description 10
- 239000002002 slurry Substances 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
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- 239000010959 steel Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000001066 destructive effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification 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
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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Abstract
The invention provides a grouting fullness detection method and a grouting fullness detection system based on sleeve surface excitation, wherein the detection method comprises the following steps: reserving an inspection opening on the prefabricated part or removing a concrete protective layer to form an inspection opening, wherein the inspection opening can expose the outer surface of the grouting sleeve; arranging an acceleration sensor and a vibration exciter on the outer surface of the grouting sleeve, and connecting the acceleration sensor with a signal acquisition and analysis device; starting a vibration exciter to perform instantaneous vibration excitation, and acquiring acceleration response data of the outer surface of the grouting sleeve; and analyzing and judging the defect condition of grouting inside the grouting sleeve through the acceleration response data. The detection method provided by the invention avoids the interference of the concrete protective layer on the test signal by setting the form of the inspection opening, greatly improves the detection accuracy, is simple in operation step, has good applicability, and has visual detection result and high reliability.
Description
Technical field
The present invention relates to assembled architecture technical fields, and in particular to the grouting plumpness detection based on sleeve surface exciting
Method and system.
Background technology
For a long time, Building Trade in China mainly use cast-in-place construction mode, from set up scaffold, supporting module, binding steel
Muscle largely works and all completes at the construction field (site) to concreting, and labor intensity is big, and construction site is chaotic, and construction material disappears
Consumption is big, and scene generation building waste is more, larger to surrounding environment influence.As labor cost rises steadily, with cheap
The site operation mode of production based on the price of labour power is just increasingly subject to challenge, prefabricated assembled form of construction work increasingly by
The concern of industry.
Sleeve grouting connection is one of the major way of bar connecting in prefabricated concrete structure, because it has construction letter
Just it, connects the advantages that reliable and is widely used.The principle of sleeve grouting connection is to utilize grout sleeve interior key, and Reperfu- sion is high
Intensity contraction-free grouting concrete realizes bar connecting by the synergistic effect of grouting material, reinforcing bar and grout sleeve.Grouting material is being in the milk
Turgor in sleeve is not full phenomenon of being in the milk there are sleeve in engineering an important factor for influencing bar connecting performance,
Therefore fabricated construction construction and installation need mating grouting plumpness detection method.
Existing sleeve grouting plumpness detection method includes mainly three categories：Pre-buried detection method, lossless detection method,
Local damage detection method.
Pre-buried detection method need to during grouting construction pre-buried auxiliary device, such as pre-buried sensor, pre-buried drawn steel wire
Pass through the test to pre-embedded device in, later stage, evaluates internal situation of being in the milk.It is influenced by reinforcement location, when reinforcing bar is close to be in the milk
When sleeve lining, pre-embedded device possibly can not stretch into inside grout sleeve；When spillage occurs again after slurry wraps up sensor, in advance
Bury possibility of the sensor, method there is also erroneous judgement；In addition, pre-buried sensor cannot be reused, therefore pre-buried sensor method
Testing cost is relatively high.
Lossless detection method is not take any pre-buried measure in advance, directly passes through ultrasonic wave, impact in concrete surface
Elastic wave, X-ray etc. detect internal flaw.It is suitable for scantling, and when grout sleeve is arranged in single or plum blossom-shaped,
The detection result of X-ray method is relatively good, because it has radioactivity, in building-site using there are certain limitations.Due to detection
The complexity of object is detected in concrete surface in grout sleeve using lossless detection methods such as ultrasonic wave, impact elasticity waves
Portion be in the milk defect it is difficult.
Local damage detection method is typically to suspecting that there are the grout sleeves of internal flaw to carry out core boring sampling, directly cutting
Disconnected grout sleeve checks that internal flaw, this method destroy bar connecting, and the detection position later stage also needs that reinforcement and strengthening is taken to arrange
It applies, is seldom used in engineering, only can just consider destructive when construction quality has dispute and can be used without other effective ways
Detection.
Above- mentioned information is only used for reinforcing the understanding of the background to the present invention, therefore it disclosed in the background technology part
May include the information not constituted to the prior art known to persons of ordinary skill in the art.
Invention content
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, provide it is a kind of based on sleeve surface exciting can
The detection method and detecting system of grouting situation inside the grout sleeve of accurate detection fabricated construction.
According to an aspect of the present invention, providing a kind of grouting plumpness detection method based on sleeve surface exciting includes
Following steps：
Inspection socket is set on prefabricated components, which can expose the outer surface of grout sleeve；
Acceleration transducer and vibrator are arranged on the outer surface of the grout sleeve, and by acceleration transducer and are believed
The connection of number acquisition and analysis device；
Start vibrator and carry out instantaneous exciting, and acquires the acceleration responsive data of the grout sleeve outer surface；
The defect situation for judging to be in the milk inside the grout sleeve by the acceleration responsive data analysis.
Preferably, two parallel surveys line are arranged along the length direction of grout sleeve in the outer surface of grout sleeve, and along perpendicular
To the multiple measuring points of arrangement of measuring-line, two surveys line are respectively used to arrangement vibrator and acceleration transducer；Judge inside grout sleeve
When the defect situation of grouting, the data-signal acquired is handled, analysis calculate vibration duration at each measuring point and
According to abnormal parameters situation or threshold value of coming to nothing judgement is identified to sleeve grouting plumpness, if having not in spectral characteristic parameter
Full situation, analysis provide not full range.
Preferably, the spacing between multiple measuring points is 5~20mm.
Preferably, the inspection socket can be reserved inspection socket, which leads to before prefabricated components casting concrete
Pre-buried separable cushion block is crossed to obtain.
Preferably, the pad thickness of the cushion block is equal to the sum of thickness of concrete cover and sleeve radius, and/or, institute
The width for stating cushion block is equal with the diameter of grout sleeve.
Preferably, the inspection socket can also be picked chisel concrete cover to grout sleeve outer surface by tool and be obtained.
Preferably, the threshold value of coming to nothing is to the full grout sleeve samples of multiple grouting by carrying out excitings, and according to shaking
The statistical value of dynamic duration or vibration frequency obtains.
According to another aspect of the present invention, a kind of grouting plumpness detecting system based on sleeve surface exciting is provided,
For above-mentioned detection method, including：
Prefabricated components are internally provided with grout sleeve, and the prefabricated components are equipped with inspection socket, and the inspection socket can reveal
Go out the outer surface of grout sleeve；
Vibrator is used for the outer surface of exciting grout sleeve；
Acceleration transducer, the acceleration responsive data for acquiring grout sleeve outer surface；
Signal processing and analysis device, for analyzing the vibration duration and spectral characteristic ginseng that calculate grout sleeve outer surface
Number.
Preferably, the inspection socket can be reserved inspection socket, which leads to before prefabricated components casting concrete
Pre-buried separable cushion block is crossed to obtain.
Preferably, the inspection socket can also be picked chisel concrete cover to grout sleeve outer surface by tool and be obtained.
As shown from the above technical solution, the advantages and positive effects of the present invention are：
Detection method is avoided concrete cover and is done to test signal by the form of setting inspection socket
It disturbs, greatly improves detection accuracy, and operating procedure is simple, there is good applicability, testing result is intuitive, reliability
Height can carry out accurate judgement to the grouting situation in grout sleeve.Moreover, this detection method will not violence damage prefabricated components
Structure, inspection socket is filled up again after detection, will not be to prefabricated components under the premise of ensureing detection accuracy
Performance impact.
Description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the schematic diagram of grout sleeve in an embodiment of the present invention detection method；
Fig. 2 is the schematic diagram of pre-buried cushion block in Fig. 1；
Fig. 3 is the schematic diagram that inspection socket is arranged and is detected；
Fig. 4 is the schematic top plan view shown when having slurry in Fig. 3 detection process inside grout sleeve；
Fig. 5 is schematic top plan view when showing in Fig. 3 detection process inside grout sleeve without slurry；
Fig. 6 is test signal time-histories figure when having slurry in typical grout sleeve；
Test signal time-histories figure when Fig. 7 is in typical grout sleeve without slurry；
Fig. 8 is test signal spectrogram when having slurry in typical grout sleeve；
Test signal spectrogram when Fig. 9 is in typical grout sleeve without slurry.
In figure：1, cushion block；2, vibrator；3, acceleration transducer；4, signal processing and analysis device；5, grout sleeve；6,
Be in the milk mouth；7, grout outlet；8, upper reinforcement；9, lower rebar；10, prefabricated components；11, inspection socket.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus will omit their detailed description.
As shown in Figures 1 to 9, embodiment of the present invention discloses a kind of grouting plumpness inspection based on sleeve surface exciting
Survey method.This detection method includes the following steps：
Inspection socket is set on prefabricated components, which can expose the outer surface of grout sleeve；
Acceleration transducer and vibrator are arranged on the outer surface of the grout sleeve, and by acceleration transducer and are believed
The connection of number acquisition and analysis device；
Start vibrator and carry out instantaneous exciting, and acquires the acceleration responsive data of the grout sleeve outer surface；
The full situation for judging to be in the milk inside the grout sleeve by the acceleration responsive data analysis.
When carrying out instantaneous excitation to object, it is equivalent to and momentum is applied to itFor the object that quality is m
Body, the momentum obtained areWhereinIndicate the velocity variations caused by impacting.By
It after exciting, is excited object and carries out free vibration, identify that Acceleration time course expression formula is at certain point by acceleration transducerAs it can be seen that object vibration characteristic and its quality, rigidity and
Damped coefficient is closely related.
Mechanical exciting, grout sleeve surface partial vibrations, the vibration of institute's detection position are carried out to grout sleeve surface
The vibration characteristics such as frequency, duration are related with the material of grout sleeve, wall thickness and the internal grouting material that whether is full of, and work as grouting
When sleeve material and constant wall thickness, whether the difference of vibration characteristics is mainly related full of grouting material with inside.When in grout sleeve
When wall lacks the support of hardening grouting material, grout sleeve local vibration characteristic will change, and judge examined part interior accordingly
Whether the grouting material that is full of is had.In a specific embodiment, it is vibrated with the grout sleeve full of grouting material under the conditions of special
Property parameter be standard value, when there are when notable difference, can determine whether that this position is in the milk for the vibration characteristics of institute's detection position and standard value
Sleeve inner underfill grouting material；Pointwise test is axially carried out along grout sleeve, according to vibration characteristics along length sleeve direction
Otherness is distributed, and can further judge the not full range of sleeve grouting.
As shown in Figure 1, the grout sleeve 5 of prefabricated components 10 injects grouting material in grouting mouth 6, these slurries fill up grouting set
5 inner spaces of cylinder, the upper reinforcement 8 being inserted into grout sleeve 5 and lower rebar 9 are connected, prefabricated components 10 are realized
In bar connecting.
Inspection socket 11 is set on prefabricated components 10, cushion block can be reserved when prefabricated components produce and obtains inspection socket 11, or
Person's later stage picks chisel concrete cover to the outer surface of grout sleeve 5 by tool and obtains inspection socket 11.In the present embodiment,
The inspection socket 11 is reserved inspection socket, which passes through pre-buried separable pad before 10 casting concrete of prefabricated components
Block 1 obtains.After removing cushion block 1, the groove formed on prefabricated components 10 is inspection socket 11.
The specific size of cushion block 1 can be selected according to demand.Preferably, the pad thickness is equal to concrete protective thickness
The sum of degree and sleeve radius, and/or, the width of the cushion block is equal with the diameter of grout sleeve.The thickness of the cushion block refers to Fig. 2
The distance between upper vertex and lower vertex of middle cushion block, that is to say, that the thickness of cushion block is equal to 1 ecto-entad of cushion block along water
Square to the depth capacity be inserted into when being inserted into inspection socket.The width of the cushion block be in Fig. 2 at left and right sides of cushion block between surface away from
From being to measure gained in the horizontal direction when cushion block 2 is inserted into inspection socket.
In the embodiment example of this detection method, in the outer surface of grout sleeve 5 along the length direction of grout sleeve 5
Two parallel surveys line, and the vertically multiple measuring points of arrangement of measuring-line are set, and two surveys line are respectively used to arrangement vibrator 2 and acceleration
Sensor 3.Spacing between multiple measuring points can be 5~20mm, and measuring point spacing is 5mm in present embodiment.In present embodiment
In grout sleeve 5 be vertically arranged, thus the length direction i.e. vertical direction of the grout sleeve 5.In these measuring points
Starting measuring point be located at the top or bottom in all measuring points.When judging the defect situation being in the milk inside grout sleeve,
The data-signal acquired is handled, analysis calculates vibration duration and spectral characteristic parameter at each measuring point, comprehensive
Judgement is identified to sleeve grouting plumpness, if having not full in the exception for considering vibration duration and main frequency of vibration parameter
Situation, according to the distribution of abnormal point, analysis provides not full range of being in the milk.
In present embodiment example, chooses vibration of the sleeve inner without grouting material and two measuring points for having grouting material and continue
Time and frequency spectrum calculate as a result, referring to Fig. 6 to Fig. 9.
Pass through collected vibration time-history curves in Fig. 6 and Fig. 7, it may be determined that amplitude decaying when institute to a certain extent at measuring point
Need the time undergone.In order to better illustrate sleeve inner without grouting material and the shadow for having grouting material to vibration duration
It rings, in present embodiment example, determines vibration duration t0So that t0The amplitude and its subsequent amplitude A (t) at moment are full
Sufficient A (t)≤kAmax(t >=t in formula0), wherein AmaxFor peak swing, k is amplitude damping factor, k value ranges are 0.1~
0.5.In present embodiment example, k=0.5 is taken, is calculated according to the method described above, sleeve inner has the measuring point of grouting material to shake
Dynamic duration t0For 0.6ms；Measuring point vibration duration t of the sleeve inner without grouting material0For 2.6ms, it is seen then that sleeve inner
Whether there is or not grouting materials to vibration duration t0Influence it is notable.
Fig. 8 and Fig. 9 is the spectrogram of above-mentioned TIME HISTORY SIGNAL respectively.As can be seen that present embodiment example from spectrogram
There is the dominant frequency of grouting material to be less than the internal dominant frequency without grouting material inside middle sleeve, it is consistent with vibration response.Therefore, by adopting
With the vibration duration and main frequency of vibration at this method analysis sleeve surface measuring point, it can accurately differentiate in sleeve that whether there is or not grouting
Material, then integrate the test result of each measuring point, it may be determined that grouting plumpness.
This detection method is directed to deficiency in the prior art, by the way that the form of inspection socket is arranged, avoids concrete protective
Interference of the layer to test signal, greatly improves detection accuracy, and operating procedure is simple, has good applicability, detection
Visual result, reliability are high, can carry out accurate judgement to the grouting situation in grout sleeve.Moreover, this detection method will not
The structure of violence damage prefabricated components fills up inspection socket after detection again, in the premise for ensureing detection accuracy
Under, the performance of prefabricated components will not be impacted.
As shown in Figures 1 to 5, embodiment of the present invention also discloses a kind of grouting plumpness based on sleeve surface exciting
Detecting system, is used for above-mentioned detection method, which includes：
Prefabricated components 10, are internally provided with grout sleeve 5, and the prefabricated components 10 are equipped with inspection socket, the inspection socket
The outer surface of grout sleeve can be exposed；
Vibrator 2 is used for the outer surface of exciting grout sleeve；
Acceleration transducer 3, the acceleration responsive data for acquiring grout sleeve outer surface；
Signal processing and analysis device 4 is connected with the acceleration transducer 3, and grout sleeve appearance is calculated for analyzing
The vibration duration and spectral characteristic parameter in face.The inspection socket is reserved inspection socket, and the reserved inspection socket is in prefabricated components
It is obtained by pre-buried separable cushion block before casting concrete.Alternatively, inspection socket picks chisel concrete cover to grouting by tool
Sleeve outer surface obtains.
It is particularly shown and described exemplary embodiments of the present invention above.It should be understood that the present invention is not limited to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising various modifications in the spirit and scope of the appended claims
And equivalent arrangements.
Claims (10)
1. a kind of grouting plumpness detection method based on sleeve surface exciting, which is characterized in that include the following steps：
Inspection socket is set on prefabricated components, which can expose the outer surface of grout sleeve；
Acceleration transducer and vibrator are arranged on the outer surface of the grout sleeve, and acceleration transducer and signal are adopted
Set analysis device connects；
Start vibrator and carry out instantaneous exciting, and acquires the acceleration responsive data of the grout sleeve outer surface；
The defect situation for judging to be in the milk inside the grout sleeve by the acceleration responsive data analysis.
2. detection method according to claim 1, which is characterized in that in the outer surface of grout sleeve along the length of grout sleeve
Spend direction and arrange two parallel surveys line, and vertically multiple measuring points of arrangement of measuring-line, two surveys line be respectively used to arrangement vibrator and
Acceleration transducer；And/or
When judging the defect situation being in the milk inside grout sleeve, the data-signal acquired is handled, described in analysis calculating
The vibration duration and spectral characteristic parameter of grout sleeve outer surface, according to abnormal parameters situation or threshold value of coming to nothing, to set
Cylinder grouting plumpness is judged.
3. detection method according to claim 2, which is characterized in that the spacing between multiple measuring points is 5~20mm.
4. detection method according to claim 1, which is characterized in that the inspection socket is reserved inspection socket, the reserved inspection
Mouth is looked into obtain by pre-buried separable cushion block before prefabricated components casting concrete.
5. detection method according to claim 4, which is characterized in that the pad thickness of the cushion block is equal to concrete protective
The sum of layer thickness and sleeve radius, and/or, the width of the cushion block is equal with the diameter of grout sleeve.
6. detection method according to claim 1, which is characterized in that the inspection socket picks chisel concrete cover by tool
It is obtained to grout sleeve outer surface.
7. detection method according to claim 2, which is characterized in that the threshold value of coming to nothing passes through full to multiple grouting
Grout sleeve sample carries out exciting, and is obtained according to the statistical value of vibration duration or vibration frequency.
8. a kind of grouting plumpness detecting system based on sleeve surface exciting, for any inspection in claim 1 to 7
Survey method, which is characterized in that including：
Prefabricated components are internally provided with grout sleeve, and the prefabricated components are equipped with inspection socket, and the inspection socket can expose filling
Starch the outer surface of sleeve；
Vibrator is used for the outer surface of exciting grout sleeve；
Acceleration transducer, the acceleration responsive data for acquiring grout sleeve outer surface；
Signal processing and analysis device, for analyzing the vibration duration and spectral characteristic parameter that calculate grout sleeve outer surface.
9. detecting system according to claim 8, which is characterized in that the inspection socket is reserved inspection socket, the reserved inspection
Mouth is looked into obtain by pre-buried separable cushion block before prefabricated components casting concrete.
10. detecting system according to claim 8, which is characterized in that the inspection socket picks chisel concrete protective by tool
Layer to grout sleeve outer surface obtains.
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| CN201810878464.0A CN108802188B (en) | 2018-08-03 | 2018-08-03 | Grouting fullness detection method and system based on sleeve surface excitation |
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| CN201810878464.0A CN108802188B (en) | 2018-08-03 | 2018-08-03 | Grouting fullness detection method and system based on sleeve surface excitation |
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| CN108802188B CN108802188B (en) | 2021-04-16 |
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Cited By (3)
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| CN110045016A (en) * | 2019-04-24 | 2019-07-23 | 四川升拓检测技术股份有限公司 | A kind of tunnel-liner lossless detection method based on audio analysis |
| CN111562312A (en) * | 2020-05-18 | 2020-08-21 | 中国矿业大学 | Detection system and method for evaluating damage condition of rock and gel material |
| US20210293676A1 (en) * | 2018-12-25 | 2021-09-23 | Zhejiang University | Device and method for detecting grout compactness of splice sleeve |
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