CN109470769A - Method and system for detecting grouting fullness of sleeve by ultrasonic reflection method - Google Patents
Method and system for detecting grouting fullness of sleeve by ultrasonic reflection method Download PDFInfo
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- CN109470769A CN109470769A CN201811156641.0A CN201811156641A CN109470769A CN 109470769 A CN109470769 A CN 109470769A CN 201811156641 A CN201811156641 A CN 201811156641A CN 109470769 A CN109470769 A CN 109470769A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001028 reflection method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 239000004567 concrete Substances 0.000 claims abstract description 44
- 239000000463 material Substances 0.000 claims description 45
- 239000011241 protective layer Substances 0.000 claims description 16
- 238000002604 ultrasonography Methods 0.000 claims description 14
- 239000011440 grout Substances 0.000 claims description 11
- 239000008267 milk Substances 0.000 claims description 11
- 210000004080 milk Anatomy 0.000 claims description 11
- 235000013336 milk Nutrition 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 12
- 230000007547 defect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
Classifications
-
- 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
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Abstract
The invention provides a method and a system for detecting grouting fullness of a sleeve by an ultrasonic reflection method. The detection method comprises the steps that a plurality of measuring points are arranged on the outer surface of a concrete member grouting sleeve protection layer along the length direction of the sleeve; arranging an ultrasonic transducer with the functions of exciting ultrasonic waves and receiving the ultrasonic waves at the measuring point; and judging the full grouting condition inside the sleeve according to the intensity of the reflected wave signals received by the ultrasonic transducer at the inner wall of the sleeve. The detection method directly arranges the measuring points on the surface of the concrete member, is simple, convenient and quick, does not need to pre-embed a sensor in advance, and belongs to the nondestructive detection technology.
Description
Technical field
The present invention relates to assembled architecture technical fields, and in particular to a kind of ultrasonic reflection method detection sleeve grouting plumpness
Method and system.
Background technique
Prefabrication, which refers to that some or all of building component and component are produced in precast plant, to be completed, then is transported
Construction site is assembled component using reliable connection type and installation machinery, and formation has design building using function
Build object.With cast-in-place structural construction compared with, prefabricated construction have it is easy for construction, project progress is fast, surrounding environment influence is small,
The advantages that building element quality is easy to get guarantee.Fabricated construction in the industrial building in China using more, nearly ten years
Application is widelyd popularize in civil buildings especially residential housing.
Sleeve grouting connection is one of main connection type of reinforcing bar in current prefabricated assembled concrete structure, and the technology is logical
Cross socket wrench specially adapted for it and realize that reinforcing bar connect with high-intensitive contraction-free grouting concrete, with quick construction, stress is simple, additional stress is small,
The advantages that applied widely, easy absorption construction error.Connector quantity because of the connection type in the same section of component is
100%, and it is typically in the important force part of component, therefore quality of connection is most important, not full, the steel if sleeve inner is in the milk
The estimated performance of design will be not achieved in muscle connection, then may bring serious structure security risk.
In the construction process, sleeve inner spillage, few the case where filling, blocking, happen occasionally, and sleeve connection quality is not met
It is required that engineering problem also reported, grouting plumpness problem is especially paid close attention to when the acceptance of work.Sleeve mainly uses steel
Material, and be embedded in concrete, it is in the milk after reinforcing bar insertion sleeve into sleeve, therefore is filled from concrete surface detection sleeve inner
Slurry defect is the difficult point of detection technique field.The sleeve design slightly difference of different-diameter, different manufacturers, commonly uses barrel bore and fills
Slurry sectional dimension is average in 10mm or so, minimum dimension about 5mm, identifies 10mm grouting defect below to the lossless inspection of concrete
It is extremely challenging for survey technology.
Currently, numerous scholar's researchs pass through ultrasound examination sleeve inner defect in concrete surface, it is contemplated that concrete
Middle aggregate influences, and needs to find balance in ultrasonic frequency and recognizable minimum defect size, high frequency ultrasound wave attenuation quickly,
Ultrasonic wave can not be received；Low-frequency ultrasonic waves can not identify 10mm rank defect below again.Because of the complexity of test object,
The non-destructive testing technology progress for penetrating concrete NDT sleeve inner grouting defect by ultrasonic wave is slow, and on going result is still
It is not able to satisfy engineering requirement.
Above- mentioned information are only used for reinforcing the understanding to background of the invention, therefore it disclosed in the background technology part
It may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of ultrasonic reflection method detection sleeve grouting is provided
The method and system of plumpness can not need pre-buried sensor on the basis of not destroying surface of concrete structure yet, can be quasi-
The really method and system of detection fabricated construction sleeve inner grouting plumpness.
According to an aspect of the present invention, a kind of method of ultrasonic reflection method detection sleeve grouting plumpness is provided, including
Following steps:
Multiple measuring points are arranged along the length direction of the sleeve in the outer surface of concrete component grout sleeve protective layer；
Arrangement has excitation ultrasound wave at the measuring point and the ultrasonic wave energy of reception is integrated or seperated ultrasonic transduction
Device；
After the ultrasonic transducer excitation ultrasound wave, concrete cover and grouting of the ultrasonic wave in the concrete component
It propagates in sleeve, ultrasonic wave is at concrete with bushing interface, sleeve and grouting material interface etc. are reflected, when the set
When there is grouting material in the inside of cylinder, in the inner wall of the sleeve and the interface of grouting material weaker reflection occurs for ultrasonic wave, most of
Ultrasonic wave continues to propagate；When the inside of the sleeve is without grouting material, ultrasonic wave is in the inner wall of the sleeve and the interface of air
Place occurs compared with strong reflection；The ultrasonic transducer receives reflection wave signal；
Judge whether there is grouting in the sleeve at the measuring point according to the signal strength or weakness degree of back wave at sleeve lining
Material, according to whether thering is grouting material to judge the grouting plumpness in the sleeve in the sleeve at multiple measuring points.
Preferably, the frequency of the ultrasonic transducer is between 0.5MHz~2MHz.
Preferably, the signal strength or weakness degree of the back wave includes that the amplitude of the back wave at the sleeve lining is big
It is small.
Preferably, further include following steps:
To the echo amplitude value at identical protective layer and same size model, the closely knit sleeve lining that is in the milk
It is counted, determines the standard amplitude A of the reflection wave signalk, take critical amplitudes A0=KAk, COEFFICIENT K value is greater than 1；It will
The amplitude A and critical amplitudes A of back wave at tested place's sleeve lining0It is compared, when A is greater than A0When, judge the measuring point place
The inside of sleeve is stated without grouting material；Alternatively,
By exchanging the ultrasonic transducer of different frequency, or the transmitting of adjustment ultrasonic wave, reception signal parameter, so that internal
Ultrasonic transducer does not receive the reflection wave signal at the sleeve lining when having grouting material, and when inside is without grouting material receives
Apparent reflection wave signal at the sleeve lining judges the sleeve at the measuring point when there is obvious reflection wave signal
Inside without grouting material.
Preferably, survey line, multiple measuring points are arranged along the length direction of the sleeve in the outer surface of the protective layer
It is sequentially arranged along the survey line in the surface of the protective layer.
Preferably, the spacing between multiple measuring points is 5mm to 20mm.
Preferably, the protective layer with a thickness of 15mm to 50mm.
According to another aspect of the present invention, provide a kind of method of ultrasonic reflection method detection sleeve grouting plumpness is
System, for above-mentioned detection method, comprising:
Concrete component；
Grout sleeve inside concrete component；
With excitation ultrasound wave and the ultrasonic wave energy of reception is integrated or seperated ultrasonic transducer；
Sound wave transmitting and acquisition and analysis device, are connected with the ultrasonic transducer, for controlling ultrasonic transducer transmitting
Sound wave simultaneously acquires data and is analyzed and determined.
Preferably, the protective layer with a thickness of 15mm to 50mm.
As shown from the above technical solution, the advantages and positive effects of the present invention are:
Detection method encounters back wave when being in the milk not full aiming at the shortcomings in the prior art, using ultrasonic wave
Propagation characteristic is directly avoided without pre-buried sensor in advance to concrete cover in the surface layout measuring point of concrete component
Destruction, belong to nondestructiving detecting means, and operating procedure is simple, there is good applicability, testing result is intuitive, reliability
Height can carry out accurate judgement to the grouting plumpness in sleeve.Random inspection can be achieved, be not required to take after detection and appoint
What repairing measures, improves detection efficiency, reduces implementation cost.
Detailed description of the invention
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 concrete component schematic diagram in an embodiment of the present invention detection method；
Fig. 2 is concrete component schematic diagram in another embodiment detection method of the present invention；
Fig. 3 is the schematic top plan view shown when having grouting material inside Fig. 1 detection process middle sleeve；
Fig. 4 is schematic top plan view when showing inside Fig. 2 detection process middle sleeve without grouting material；
Fig. 5 is the arrangement of measuring-line figure of an embodiment of the present invention；
Fig. 6 is the full place's reflection wave signal that is in the milk by detection method test；
Fig. 7 is not to be in the milk to locate reflection wave signal by detection method test；
In figure: 1, ultrasonic transducer；2, sound wave transmitting and acquisition and analysis device；3, sleeve；4, be in the milk mouth；5, grout outlet；
6, upper reinforcement；7, lower rebar；8, concrete component.
Specific embodiment
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 the detailed description that will omit them.
According to existing structure design specification, protective layer thickness is full to the grouting of sleeve generally between 15mm~50mm
The detection of degree can only focus on ultrasonic wave in the propagation characteristic of concrete cover and sleeve range, if recycling ultrasonic reflections letter
Number whether there is grouting material in sleeve to analyze, then ultrasonic wave propagation path is shorter, this has any different lacks in traditional inside concrete
Sunken detection must use low frequency ultrasound transducer, therefore, can be realized by the stimulating frequency of raising ultrasonic transducer to smaller
The identification of defect.
By the propagation characteristic of wave it is found that ultrasonic wave for vertical incidence, pressure reflection ratio:
Wherein, Z1, Z2The respectively acoustical impedance value of the 1st medium and the 2nd medium.
When ultrasonic wave is propagated in the medium, displacement amplitude can be calculated with the decaying of propagation distance according to following formula:
A=A0e-α(x) (2)
Wherein, A indicates to propagate the displacement amplitude after x distance, A0Indicate that initial amplitude, α (x) indicate the decaying system of medium
Number.
In comparison, since the ultrasonic impedances of concrete and steel are closer to, by formula (1) it is found that in coagulation
Soil and steel interface ultrasonic reflections energy are smaller, and most of ultrasonic wave continues to propagate in grout sleeve.If had in sleeve
Closely knit grouting material, since the ultrasonic impedances of steel and grouting material are closer to, then ultrasonic wave is in sleeve lining and grouting material
Interface is still based on transmission；If then surpassed without grouting material since the ultrasonic impedances of steel and air are widely different in sleeve
Sound wave at sleeve lining and Air Interface based on reflecting, energy converter receives at this time back wave Mintrop wave signal propagation path
It is approximately equal to 2 times of the sum of protective layer thickness and sleeve wall thickness.High-frequency ultrasonic is decayed comparatively fast in concrete, and component thickness
It is anti-to receive ultrasonic wave by formula (2) it is found that when sleeve inner has grouting material much larger than thickness of concrete cover for size
The first amplitude for penetrating signal is lower, or even does not receive reflected wave information；When sleeve inner is without grouting material, ultrasonic wave is received
The first amplitude for reflecting signal is higher.
Based on the above principles, referring to Fig. 1 to Fig. 7, embodiment of the present invention discloses a kind of ultrasonic reflection method detection sleeve
The method and system for plumpness of being in the milk.This detection method includes the following steps:
In this example, the sleeve grouting plumpness of ultrasonic reflection method detection fabricated construction, fabricated construction packet are utilized
Concrete component 8 is included, grout sleeve 3 is embedded in concrete component 8.The sleeve 3 injects grouting material from grouting mouth 4, fills
Slurry fills up the inner space of sleeve 3 and connects the upper reinforcement 6 being inserted into sleeve 3 and lower rebar 7 after grouting material solidification
Get up, to realize the reinforcing bar connection in concrete component 9.
According to design drawing shown in fig. 5, the shear wall that production machined the grout sleeve for being embedded with different plumpness is mixed
Solidifying soil component 8.Survey line is arranged along the length direction of sleeve 3 on 8 surface of concrete component.Sleeve 3 in the present embodiment is
Vertically arranged, thus the length direction i.e. vertical direction of the sleeve 3.Each measuring point is successively longitudinally arranged along survey line in sleeve
On 3, ultrasonic transducer 1 is arranged at each measuring point, the spacing between multiple measuring points is 5~20mm, and for example, 5mm both facilitated
Detection, and can ensure that the accuracy of detection.
According to protection thickness and sleeve wall thickness, the high-frequency transducer of different operating frequency, such as working frequency are selected
For the energy converter of 1.5MHz, arrangement has excitation ultrasound wave and receives ultrasonic wave energy and is integrated or seperated at the measuring point
Ultrasonic transducer 1 is convenient for execute-in-place, keeps overall structure simple.
After the 1 excitation ultrasound wave of ultrasonic transducer, ultrasonic wave is propagated in the concrete component 8, high-frequency ultrasonic
Weaker first reflection occurs in the interface of the protective layer and the outer wall of the sleeve 3, rest part is in the sleeve 3
Inside continue to propagate, when there is closely knit grouting material in the inside of the sleeve 3, inner wall and grouting material of the ultrasonic wave in the sleeve 3
Interface weaker the second secondary reflection occurs, rest part continues to propagate, as shown in figures 1 and 3；When the sleeve 3
When inside is without grouting material, ultrasonic wave occurs to receive at this time super compared with strong reflection in the inner wall of the sleeve 3 and the interface of air
The main propagation path that sound wave reflects Mintrop wave signal is equal to 2 times of the sum of grout sleeve wall thickness and protective layer thickness, such as Fig. 2 and figure
Shown in 4.Have grouting material in sleeve inner and without two kinds of grouting material, ultrasonic wave reflected at sleeve lining signal difference compared with
Greatly, therefore it can judge whether there is grouting in the sleeve 3 at the measuring point according to the degree of strength for receiving reflection wave signal
Material.When there is grouting material in sleeve, the reflection signal received at sleeve lining is weaker, as shown in Figure 6；When in sleeve without grouting
When material, the reflection signal received at sleeve lining is stronger, as shown in Figure 7.According to whether having in sleeve 3 described at multiple measuring points
Grouting plumpness in sleeve 3 described in grouting material comprehensive descision.
In the present embodiment, in identical protective layer and being embedded with same size model, closely knit 3 coagulation of sleeve of grouting
Native component surface receives echo amplitude value at sleeve lining and is counted, and determines the standard amplitude A of reflection wave signalk, take
Critical amplitudes A0=1.2Ak.By the echo amplitude A and critical amplitudes A at tested place0It is compared, when A is greater than A0When, judgement
Without grouting material inside sleeve 3 at the measuring point, then judge there is grouting material in sleeve 3 at the measuring point on the contrary.Finally according to multiple measuring points
The plumpness for whether thering is grouting material comprehensive descision sleeve 3 to be in the milk in the sleeve 3 at place.For example, having has grouting material at half measuring point, one
Without grouting material at half measuring point, then judge grouting plumpness for 50%.
Detection method is aiming at the shortcomings in the prior art, as shown in Figures 1 to 4, straight on 8 surface of concrete component
Arrangement detection device is connect, without placement sensor in advance, also avoids the destruction to concrete cover, and operating procedure is simple,
With good applicability, testing result is intuitive, reliability is high, belongs to random lossless detection, can be full to the grouting in sleeve 3
Full scale carries out accurate judgement.It is not required to take any repairing measures after detection, improves detection efficiency, reduce and be implemented as
This.
As shown in Figures 1 to 4, embodiment of the present invention also discloses a kind of ultrasonic reflection method detection fabricated construction sleeve
The system for plumpness of being in the milk, for above-mentioned detection method, which includes:
Precast concrete 8 is internally provided with grout sleeve 3；The concrete cover is located at the diameter of the sleeve 3
Outward；Ultrasonic transducer 1 excitation ultrasound wave but also can receive ultrasonic wave；Sound wave transmitting and acquisition and analysis device 2 and ultrasound
Energy converter 1 is connected, and is analyzed and determined for controlling the transmitting sound wave of ultrasonic transducer 1 and acquiring data.Transmitting and acquisition point
Analysis apparatus 2 is also used to record the waveform of back wave and analyzes the amplitude of determining back wave.
Directly concrete component 8 can be detected in the detection system, without destroying 8 surface of concrete component, also without
Detection position or pre-buried sensor need to be reserved, detection efficiency is improved.And the safety of concrete component 8 and durable is not influenced
Property, it ensure that the globality of structure.
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 (9)
1. a kind of method of ultrasonic reflection method detection sleeve grouting plumpness, which comprises the steps of:
Multiple measuring points are arranged along the length direction of the sleeve in the outer surface of concrete component grout sleeve protective layer；
Arrangement has excitation ultrasound wave and receives the ultrasonic transducer of ultrasonic wave energy at the measuring point；
After the ultrasonic transducer excitation ultrasound wave, concrete cover and grout sleeve of the ultrasonic wave in the concrete component
Interior propagation, ultrasonic wave is at concrete with bushing interface, sleeve and grouting material interface etc. are reflected, when the sleeve
When there is grouting material in inside, in the inner wall of the sleeve and the interface of grouting material weaker reflection, most of ultrasound occur for ultrasonic wave
Wave continues to propagate；When the inside of the sleeve is without grouting material, ultrasonic wave is sent out in the inner wall of the sleeve and the interface of air
Life is compared with strong reflection；The ultrasonic transducer receives reflection wave signal；
Judge whether there is grouting material, root at the measuring point in the sleeve according to the signal strength or weakness degree of back wave at sleeve lining
According to whether thering is grouting material to judge the grouting plumpness in the sleeve in the sleeve at multiple measuring points.
2. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 1, which is characterized in that described super
The frequency of sonic transducer is between 0.5MHz~2MHz.
3. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 1, which is characterized in that described anti-
The signal strength or weakness degree of ejected wave includes the amplitude size of the back wave at the sleeve lining.
4. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 2, which is characterized in that further include
Following steps:
The echo amplitude value at identical protective layer and same size model, the closely knit sleeve lining that is in the milk is carried out
Statistics, determines the standard amplitude A of the reflection wave signalk, take critical amplitudes A0=KAk, COEFFICIENT K value is greater than 1；It will be tested
Locate the amplitude A and critical amplitudes A of the back wave at sleeve lining0It is compared, when A is greater than A0When, judge the set at the measuring point
The inside of cylinder is without grouting material；Alternatively,
By exchanging the ultrasonic transducer of different frequency, or the transmitting of adjustment ultrasonic wave, reception signal parameter, so that there is filling in inside
Ultrasonic transducer does not receive the reflection wave signal at the sleeve lining when slurry, and when inside is without grouting material receive it is described
Apparent reflection wave signal at sleeve lining is judged at the measuring point when there is obvious reflection wave signal in the sleeve
Portion is without grouting material.
5. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 1, which is characterized in that described
The outer surface of protective layer arranges that survey line, multiple measuring points are sequentially arranged along the survey line in institute along the length direction of the sleeve
State the surface of protective layer.
6. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 4, which is characterized in that Duo Gesuo
Stating the spacing between measuring point is 5mm to 20mm.
7. the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 1, which is characterized in that the guarantor
Sheath with a thickness of 15mm to 50mm.
8. a kind of system of the method for ultrasonic reflection method detection sleeve grouting plumpness, for any described in claim 1 to 6
Detection method characterized by comprising
Concrete component；
Grout sleeve inside concrete component；
Ultrasonic transducer with excitation ultrasound wave and the ultrasonic wave energy of reception；
Sound wave transmitting and acquisition and analysis device, are connected with the ultrasonic transducer, for controlling ultrasonic transducer transmitting sound wave
And it acquires data and is analyzed and determined.
9. the system of the method for ultrasonic reflection method detection sleeve grouting plumpness according to claim 7, which is characterized in that
The protective layer with a thickness of 15mm to 50mm.
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| CN201811156641.0A CN109470769B (en) | 2018-09-30 | 2018-09-30 | Method and system for detecting grouting fullness of sleeve by ultrasonic reflection method |
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| CN201811156641.0A CN109470769B (en) | 2018-09-30 | 2018-09-30 | Method and system for detecting grouting fullness of sleeve by ultrasonic reflection method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855811A (en) * | 2020-07-30 | 2020-10-30 | 贵州中建建筑科研设计院有限公司 | Method for testing grouting fullness of prefabricated concrete building component sleeve |
| CN113252774A (en) * | 2021-06-07 | 2021-08-13 | 北京唯恩传感技术有限公司 | Detection system based on ultrasonic transduction |
| CN113589295A (en) * | 2021-07-29 | 2021-11-02 | 浙江大学 | Grouting sleeve monitoring device based on acoustic ranging and using method |
| CN113702504A (en) * | 2020-07-28 | 2021-11-26 | 广州建筑产业研究院有限公司 | Sleeve grouting fullness detection method and computer equipment |
| CN117129497A (en) * | 2023-10-26 | 2023-11-28 | 中铁建设集团有限公司 | Device and method for detecting grouting construction defects of PC (polycarbonate) component |
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| CN113252774A (en) * | 2021-06-07 | 2021-08-13 | 北京唯恩传感技术有限公司 | Detection system based on ultrasonic transduction |
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