CN106501368A - A kind of sound detecting pipe buckling phenomenon recognition methodss for pile detection sound wave transmission method - Google Patents
A kind of sound detecting pipe buckling phenomenon recognition methodss for pile detection sound wave transmission method Download PDFInfo
- Publication number
- CN106501368A CN106501368A CN201611251975.7A CN201611251975A CN106501368A CN 106501368 A CN106501368 A CN 106501368A CN 201611251975 A CN201611251975 A CN 201611251975A CN 106501368 A CN106501368 A CN 106501368A
- Authority
- CN
- China
- Prior art keywords
- wave
- section face
- complete section
- velocity
- acoustic signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time 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
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/011—Velocity or travel time
-
- 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
- G01N2291/023—Solids
-
- 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
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
Abstract
The invention belongs to engineering survey field, discloses a kind of sound detecting pipe buckling phenomenon recognition methodss for pile detection sound wave transmission method, including：Using low pass collection, broadband response and reception technique, the real-time acoustic signals of measurement longitudinal profile each point, obtain complete section face velocity of wave variation diagram successively；The acoustic signals are carried out with Fourier transformation, complete section face acoustic signals frequency domain figure is obtained；Each point is calculated according to the velocity of wave variation diagram and design stake footpath and estimates characteristic frequency；Each tested point is found in the complete section face acoustic signals frequency domain figure and estimates the actual characteristic frequency near characteristic frequency；If certain region actual measurement velocity of wave deviates considerably from normal value in the section velocity of wave variation diagram, and characteristic frequency still and is estimated characteristic frequency and is close in the acoustic signals frequency domain figure, then the region is sound detecting pipe bending, unrelated with pile quality；The inventive method efficiently solves the problems, such as that the insoluble bend pipe effect of traditional acoustic transmission beam method causes, it is to avoid the loss that erroneous judgement misjudgement is likely to result in engineering.
Description
Technical field
The invention belongs to engineering survey field, more particularly, to a kind of sounding for pile detection sound wave transmission method
Pipe buckling phenomenon recognition methodss.
Background technology
During ultrasound wave passes through concrete medium, medium performance itself and structure can be to the various acoustics of acoustic signals
Parameter produces impact.At this stage, in RC axial loading column, the general parameters,acoustic that investigates has velocity of wave, amplitude, frequency and ripple
Shape.
The change of acoustic velocity：The speed that sound wave is propagated in the different concrete of material is different.Generally, coagulation
The internal structure of soil-structure interactions is finer and close, and elastic modelling quantity is higher, and porosity is lower, then the intensity of the velocity of wave and concrete of sound wave
Higher；Sound wave is propagated in inside concrete, when running into defect (cavity, concrete disintegration, necking down, locally loose etc.), received wave
It is more than normal portions during sound.
The change of sonic wave amplitude：As the follow-up ripple of received wave is disturbed by superposition ripple, meeting impact analysis result, because
This, sonic wave amplitude is often referred to the amplitude of Mintrop wave.The amplitude of received wave is related through the energy attenuation after concrete medium to sound wave,
And the size for decaying can reflect the intensity of concrete in certain degree.The wave amplitude of received wave is lower, and sound wave passes through concrete
Attenuation degree more serious.When ultrasound wave is propagated in inside concrete, defect (cavity, concrete disintegration, necking down, office is run into
Portion is loose etc.), amplitude declines.Wave amplitude directly can be observed in the oscillogram of received wave very much, ceased with the quality of concrete
Manner of breathing is closed, and is also stronger to the sensing of concrete defect, and therefore wave amplitude is to judge the critically important parameter of concrete defect.
The change of pulse domain frequency：It is the multifrequency containing a lot of different frequency compositions that impulse wave in ultrasound examination is
Ripple., through after concrete medium, the wave attenuation degree of different frequency composition is different, and frequency is higher for this multifrequency ripple, and decay journey
Degree is bigger.As the increase of sonic propagation distance, the amount of HFS are fewer and feweri, the basic frequency of received wave is caused to reduce.When
So, in addition to propagation distance, when sound wave runs into defect in communication process, the decay aggravation of ripple causes the dominant frequency of received wave
Rate can also be remarkably decreased.
The change of acoustic waveform：Impulse wave propagate in concrete run into defect can reflect in the interface of defect,
Refraction and diffraction etc., a variety of ripples are different due to the propagation path different times for reaching receive transducer, cause not homophase
The ripple of position and frequency is superimposed, so that the wave distortion of received wave.So, the waveform change of received wave is also to judge coagulation
The foundation of native defect.
Sound wave transmission method detection technique is used for the integrity for detecting cast-in-place concrete pile.Before foundation pile pore-forming, coagulation pile,
Inside pile body, pre-buried several sound detecting pipes are used as acoustic emission and the lower channel of receive transducer, after concrete strength is up to standard
Start to detect, detected with determining deviation pointwise from bottom to top with longitudinal direction of the sonic wave detector along stake.By passing through to sound wave
Process, the analysis of the waveform and parameters,acoustic in each section of pile body, so as to infer the integrity of pile concrete, determines defect
Position, scope, degree.But the pile body integrity field of sound wave transmission method detection instantly, sound detecting pipe when bending phenomenon occurs with mixed
Often there is identical test signal when there are quality problems in solidifying soil pile body, is difficult to differentiate between in analysis.
Content of the invention
Disadvantages described above or Improvement requirement for prior art, the invention provides a kind of be based on pile detection acoustic wave transmission
The sound detecting pipe buckling phenomenon recognition methodss of method, thus solve the problems, such as None- identified sound detecting pipe buckling phenomenon in prior art.
The invention provides a kind of sound detecting pipe buckling phenomenon recognition methodss based on pile detection sound wave transmission method, the side
Method includes：
Using the low pass acquisition technique and broadband reception technique of sonic apparatus, complete section face obtains transmitting transducer and connects successively
The 500Hz of transducer place plane survey line is received with super band acoustic signals, complete section face actual measurement acoustic signals are obtained；
Acoustic signals are surveyed for the complete section face, real-time acoustic velocity is calculated, while the average velocity of wave in complete section face is obtained, and
Obtain complete section face velocity of wave variation diagram；
Fourier transformation is carried out for complete section face actual measurement acoustic signals, complete section face acoustic signals spectrogram is obtained；
According to the average velocity of wave in Known designs stake footpath and the complete section face, the characteristic frequency of estimating of each point is calculated, and using quarter
Degree is continuously identified in the complete section face acoustic signals spectrogram automatically；
According to the complete section face acoustic signals spectrogram, find near characteristic frequency the corresponding reality of resonance peak in described estimating
Border characteristic frequency, the mark that is automatically performed described in modification form actual characteristic Frequency Identification figure；
Velocity of wave abnormal area in the complete section face velocity of wave variation diagram is extracted, and is carried out with the actual characteristic Frequency Identification figure
Compare, distinguish bend pipe effect and pile defect.
In one embodiment of the present of invention, the sonic apparatus and receive transducer can receive the sound wave letter of more than 500Hz
Number.
In one embodiment of the present of invention, for guaranteeing broadband response and receiving ability, transmitting transducer used and reception
Transducer can not adopt identical resonance peak, and transmitting transducer resonance peak must not be higher than the three of receive transducer resonance peak frequency values
/ bis-.
In one embodiment of the present of invention, acoustic signals are surveyed for the complete section face, calculate real-time velocity of wave, obtain complete section
Face velocity of wave variation diagram, and the average velocity of wave in complete section face is calculated, specially：
Acoustic signals are surveyed for the complete section face, according to then with sound detecting pipe tube pitch, calculate real-time acoustic velocity, root
The average velocity of wave in complete section face is obtained according to the real-time velocity of wave average computation of each tested point, while obtaining complete section face velocity of wave variation diagram.
In one embodiment of the present of invention, Fourier transformation is carried out for complete section face actual measurement acoustic signals, obtained complete
Section acoustic signals spectrogram, specially：
The real-time acoustic signals in complete section face are obtained using sonic apparatus, and carries out complete section face Fourier transformation, obtain complete section face each
Tested point acoustic signals spectrogram.
In one embodiment of the present of invention, calculated according to the average velocity of wave in complete section face sound wave complete section face and design stake footpath each to be measured
That put estimates characteristic frequency, and is continuously identified in the complete section face acoustic signals spectrogram automatically using scale, specifically
For：
Using formula fm=kca/2DdThat asked for estimates characteristic frequency, wherein fmCharacteristic frequency value is estimated for asked for, k is
Correction factor takes, k=1.0, CaFor the average velocity of wave in complete section face, DdFor Known designs stake footpath；
Characteristic frequency is estimated according to described, sequentially in the complete section face acoustic signals spectrogram, pointwise mark is carried out automatically
Know.
In one embodiment of the present of invention, according to the complete section face acoustic signals spectrogram, characteristic frequency is estimated described
Value nearby finds actual characteristic frequency values, the modification mark being automatically performed, formation actual characteristic Frequency Identification figure, specifically
For：
In the complete section face acoustic signals spectrogram, search near characteristic frequency resonance peak in described estimating, obtain true
Positive characteristic frequency is simultaneously identified, and forms actual characteristic Frequency Identification figure.
In one embodiment of the present of invention, extract velocity of wave abnormal area in the complete section face velocity of wave variation diagram, and with described
Actual characteristic Frequency Identification figure is compared, and distinguishes bend pipe effect and pile defect, specially：
Compare the complete section face velocity of wave variation diagram and the actual characteristic Frequency Identification figure, if anomaly of wave velocity region reality
Characteristic frequency is normal, then belong to bend pipe effect, and its anomaly of wave velocity is unrelated with pile quality；If the low region actual characteristic frequency of velocity of wave
Rate estimates characteristic frequency more than 10% described in being higher by simultaneously, then the low region of the velocity of wave has pile quality.
In general, as cast-in-place concrete pile is due to underground construction factor, it is impossible to observe, its pile quality must pass through
Test determines that, relative to other method of testings existing, the accuracy of sound wave transmission method is higher.For due to appearance in test
The abnormal signal caused because of sound detecting pipe bend pipe or concrete pile body quality problems is difficult to differentiate between；Test result often because
People and different, with very big anthropic factor, cause inevitably dispute unavoidably, or even also occur erroneous judgement.The method profit
Problem present in test instantly is largely solved with frequency-domain analysis method so that due to sound detecting pipe bend pipe or mixed
The abnormal signal that solidifying soil pile quality problem is caused is more easy to analysis and judges, with higher Feasible degree, so as to advantageously ensure that work
Cheng Zhiliang and promote the development of industry.
Description of the drawings
Fig. 1 is the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method in the embodiment of the present invention；
Fig. 2 is the conventional principle schematic to surveying method in the embodiment of the present invention；
Fig. 3 is a kind of structural representation of sonic wave detector in the embodiment of the present invention；
Fig. 4 is a kind of structural representation of circular ring type radial transducer in the embodiment of the present invention；
Fig. 5 is the structural representation for testing Model No.1 bored concrete pile in the embodiment of the present invention；
Fig. 6 is the structural representation of No. 2 bored concrete piles of test model in the embodiment of the present invention；
Fig. 7 is sound detecting pipe bend pipe and defect schematic diagram in the embodiment of the present invention；
Fig. 8 is test tube actual measurement velocity of wave-depth curve synoptic diagram to be measured in the embodiment of the present invention；
Fig. 9 is that test tube calculates stake footpath-depth curve synoptic diagram to be measured in the embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and
It is not used in the restriction present invention.As long as additionally, involved technical characteristic in invention described below each embodiment
Do not constitute conflict each other can just be mutually combined.
As shown in figure 1, in order to solve the above problems, embodiments providing a kind of based on pile detection acoustic wave transmission
The sound detecting pipe buckling phenomenon recognition methodss of method, when substantially exception is in other normal values of wave speed for the velocity of wave of certain measurement position, meter
That calculates the measurement position estimates characteristic frequency value, and according to estimating characteristic frequency and acoustic signals frequency domain figure judges, if
There is bend pipe or pile defect.Methods described comprises the steps：
Using the low pass acquisition technique and broadband reception technique of sonic apparatus, complete section face obtains transmitting transducer and connects successively
The 500Hz of transducer place plane survey line is received with super band acoustic signals, complete section face actual measurement acoustic signals are obtained；
Acoustic signals are surveyed for the complete section face, real-time acoustic velocity is calculated, while the average velocity of wave in complete section face is obtained, and
Obtain complete section face velocity of wave variation diagram；
Fourier transformation is carried out for complete section face actual measurement acoustic signals, complete section face acoustic signals spectrogram is obtained；
According to the average velocity of wave in Known designs stake footpath and the complete section face, the characteristic frequency of estimating of each point is calculated, and using quarter
Degree is continuously identified in the complete section face acoustic signals spectrogram automatically；
According to the complete section face acoustic signals spectrogram, find near characteristic frequency the corresponding reality of resonance peak in described estimating
Border characteristic frequency, the mark that is automatically performed described in modification form actual characteristic Frequency Identification figure；
Velocity of wave abnormal area in the complete section face velocity of wave variation diagram is extracted, and is carried out with the actual characteristic Frequency Identification figure
Compare, distinguish bend pipe effect and pile defect.
Test method in the embodiment of the present invention be as shown in Figure 2 conventional to survey method, specifically：
A) apparatus selection and parameter setting
Using the low pass acquisition technique and broadband reception technique of sonic apparatus, complete section face obtains transmitting transducer and connects successively
The 500Hz of transducer place plane survey line is received with super band acoustic signals, complete section face actual measurement acoustic signals are obtained；
Test the use of instrument is nonmetal ultrasonic detector as shown in Figure 3, be furnished with circular ring type footpath as shown in Figure 4
To transducer, transmitting transducer dominant frequency is respectively 40kHz, 60kHz, and receive transducer dominant frequency is 60kHz.Measured signal by
1#, 2# circle stake (as shown in Figure 5, Figure 6) sound wave transmission method detection is obtained.Instrument parameter is set to：Sampling pace is 10cm, sampling
Count as 2048, the sampling interval is 3 μ s, passband is set to 10Hz-60kHz, time delay 0 μ s, emitting voltage 500v, letter
Number post processing uses ultrasonic analysiss systems soft ware.
Wherein, the sonic apparatus and receive transducer, can receive the acoustic signals of more than 500Hz.In addition, being to guarantee width
Frequency response and receiving ability, transmitting transducer used and receive transducer can not adopt identical resonance peak, transmitting transducer
Resonance peak must not be higher than 2/3rds of receive transducer resonance peak frequency values.
(B) experimental technique
Acoustic signals are surveyed for the complete section face, real-time acoustic velocity is calculated, while the average velocity of wave in complete section face is obtained, and
Obtain complete section face velocity of wave variation diagram；
Conventional to surveying, the transducer that dominant frequency is respectively adopted for 40kHz, 60kHz is launched, and dominant frequency is that the transducer of 60kHz connects
Receive, gather two groups of stimulus.
(C) data processing
A judges whether velocity of wave occurs exception
Fourier transformation is carried out for complete section face actual measurement acoustic signals, complete section face acoustic signals spectrogram is obtained；
Acoustic signals are surveyed for the complete section face, according to then with sound detecting pipe tube pitch, calculate real-time acoustic velocity, obtain
Complete section face acoustic velocity variation diagram is obtained, judges that velocity of wave compares place experience velocity of wave and whether other actual measurement velocities of wave occur exception.
Specifically, acoustic signals are surveyed for the complete section face, according to then with sound detecting pipe tube pitch, calculate real-time sound wave
Velocity of wave, obtains the average velocity of wave in complete section face according to the real-time velocity of wave average computation of each tested point, while obtaining complete section face velocity of wave variation diagram.
Characteristic frequency is estimated in b determinations
According to the average velocity of wave in Known designs stake footpath and the complete section face, the characteristic frequency of estimating of each point is calculated, and using quarter
Degree is continuously identified in the complete section face acoustic signals spectrogram automatically；
Specifically, measuring point is calculated by formula estimate characteristic frequency fm=kca/2Dd, DdFor intended diameter, wherein fmFor asking for
Estimate characteristic frequency value, k takes k=1.0, c for correction factoraFor the average velocity of wave in complete section face；Characteristic frequency is estimated according to described,
Pointwise mark is sequentially carried out in the spectrogram of the complete section face automatically.
C determines actual characteristic frequency
According to the complete section face acoustic signals spectrogram, find near characteristic frequency the corresponding reality of resonance peak in described estimating
Border characteristic frequency, the mark that is automatically performed described in modification form actual characteristic Frequency Identification figure；
Particularly, in described complete section face high accuracy spectrogram, search resonance peak described near estimating characteristic frequency, obtain Real characteristic frequency is taken, and is identified.
D recognizes sound detecting pipe buckling phenomenon
The region anomaly of wave velocity, and the actual characteristic frequency is not changed substantially, then the anomaly of wave velocity belongs to
In bend pipe effect, unrelated with pile quality；The region velocity of wave is low, and at the same time, the actual characteristic frequency is higher by setting
Threshold value, then belong to pile quality problem.
Velocity of wave abnormal area in the complete section face velocity of wave variation diagram is extracted, and is carried out with the actual characteristic Frequency Identification figure
Compare, distinguish bend pipe effect and pile defect.
As shown in fig. 7, occurring the situation of defect for pile concrete, defect includes cavity, concrete disintegration, necking down, office
Portion is loose etc..Sound detecting pipe bend pipe be then in terms of the design or construction due to, cause sound detecting pipe with section steel reinforcement cage middle position
Put the relative skew of appearance.Strictly speaking the signal that sound detecting pipe bend pipe not defect, but pipe bent position is detected often shows
The feature of rejected region, pipe bent position cause sound wave then to increase due to the increase of measuring point spacing, are now asked using default tube pitch
The velocity of wave for going out can undoubtedly reduce, and when tube pitch is normal but pile body inside existing defects when equally also occur velocity of wave decline feelings
Condition, the two measured signal respectively have the similarities and differences, want to accurately distinguish certain difficulty.Suddenly subtract for occurring velocity of wave in Practical Project
How little situation, now judge that pile body inner case always is engineering emphasis and difficult point.Frequency domain analysises can be very good to solve
Determine this engineering roadblock.
Specifically, the complete section face velocity of wave variation diagram and the actual characteristic Frequency Identification figure are compared, if anomaly of wave velocity
Region actual characteristic frequency is normal, then belong to bend pipe effect, and its anomaly of wave velocity is unrelated with pile quality；If the low region reality of velocity of wave
Height is higher by threshold value to border characteristic frequency simultaneously, then belong to pile quality problem.Specifically, this threshold value can be set according to practical situation
Fixed, here is not specifically limited.
10% for example could be arranged to, when the frequency domain value of the peak point of frequency domain appearance estimates characteristic frequency domain value phase with described
To error within 10% (including 10%), it can be determined that for sound detecting pipe bend pipe, the frequency domain value of the peak point occurred when frequency domain with
Described estimates characteristic frequency domain value relative error more than 10%, judges that defect occurs in pile concrete.
The method that the present invention judges bend pipe effect based on sound wave transmission method characteristic frequency domain is described below in conjunction with specific embodiment.
Frequency-domain analysis method engineer applied 2- distinguishes cast-in-place concrete pile bend pipe and defect
Judge step：
A reads the real-time wave velocity C ' very little that instrument measures certain position to be measured, the normal C of remainder velocity of wave.
B substitutes into design stake footpath DdGo out to estimate characteristic frequency value f with normal wave velocity C backwards calculationm.
C carries out frequency domain conversion to time-domain signal, if estimating characteristic frequency value fmNearby there is peak point and then illustrate occur
Bend pipe, pile quality have no problem to need to treat location and put velocity of wave and carry out bend pipe correction.If there are exception and characteristic peaks in frequency domain
Point fm' be much larger than discreet value, then existing defects inside pile body are described.
By taking No. 2 bored concrete piles as an example, the " U "-shaped bending of its 3-4 section actual measurement velocity of wave-to be measured depth curve, such as Fig. 8 institutes
Show.Position and speed to be measured constantly declines and recovers normally, only to sentence with time-domain signal
The phenomenon of breaking is caused by bend pipe or defect.Spectrum transformation is carried out to measured time-domain signal and is entered according to above-mentioned 3 steps
Row judgement, uniformly extracts part position to be measured at a certain distance along depth direction.Characteristic frequency is read in figure and calculates stake
Footpath, its result are as shown in table 1.
1 section 3-4 of table position calculation results to be measured
In the case where stake footpath is constant, signal frequency domain is not affected by location gap to be measured, if in other words under 3-4 sections velocity of wave
Drop is caused away from increase (bend pipe) by pipe, then which receives signal frequency domain and answers normal and feature value stabilization in a certain frequency or so.
Otherwise there are existing defects inside abnormal then explanation pile body in frequency-region signal.
It is placed at 3.9m according to No. 2 stake design drawing baffle plates, comparative test result is understood when depth to be measured is less than 3.9m
Velocity of wave, frequency domain and to calculate stake footpath normal (such as depth 2.1m to be measured), velocity of wave when depth to be measured is more than 3.9m, frequently
Domain and calculating stake footpath exception, calculate footpath-depth curve such as Fig. 8.Recorded with site operation according to Model Pile design drawing, No. 2
Stake sound detecting pipe be to be welded and fixed with inner steel bar cage, it is impossible to there is bend pipe, thus must be at pile crown arrange baffle plate and
Sandbag hinders filling concrete and causes bottom defect.Comprehensive descision is carried out according to frequency domain information and can learn appearance inside pile body
Defect rather than bend pipe, constantly reduction more demonstrates this saying to Fig. 9 result of calculations effective pile diameter.It is easy to using conventional method
It is judged as bend pipe and then carries out speed correction finally failing to judge defect by the signal, it is seen that sound wave transmission method frequency domain analysises can be effective
Distinguish defect and bend pipe.
As it will be easily appreciated by one skilled in the art that the foregoing is only presently preferred embodiments of the present invention, not in order to
The present invention, all any modification, equivalent and improvement that is made within the spirit and principles in the present invention etc. is limited, all should be included
Within protection scope of the present invention.
Claims (8)
1. a kind of sound detecting pipe buckling phenomenon recognition methodss for pile detection sound wave transmission method, it is characterised in that methods described
Including：
Using the low pass acquisition technique and broadband reception technique of sonic apparatus, complete section face obtains transmitting transducer and reception is changed successively
The 500Hz of energy device place plane survey line obtains complete section face actual measurement acoustic signals with super band acoustic signals；
Acoustic signals are surveyed for the complete section face, real-time velocity of wave is calculated, while obtaining the average velocity of wave in complete section face, and is obtained complete section
Face velocity of wave variation diagram；
Fourier transformation is carried out for complete section face actual measurement acoustic signals, complete section face acoustic signals spectrogram is obtained；
According to the average velocity of wave in Known designs stake footpath and the complete section face, calculate each point estimates characteristic frequency, and is existed using scale
Automatically continuously identified in the complete section face acoustic signals spectrogram；
According to the complete section face acoustic signals spectrogram, find near characteristic frequency the corresponding actual spy of resonance peak in described estimating
Levy frequency, the mark being automatically performed described in modification forms complete section face actual characteristic Frequency Identification figure；
Velocity of wave abnormal area in the complete section face velocity of wave variation diagram is extracted, and is entered with the complete section face actual characteristic Frequency Identification figure
Row is compared, and distinguishes bend pipe effect and pile defect.
2. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1, its feature
It is that the sonic apparatus and receive transducer can receive the acoustic signals of more than 500Hz.
3. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, for guaranteeing that broadband response and receiving ability, transmitting transducer used and receive transducer can not adopt identical humorous
Shake peak, and transmitting transducer resonance peak must not be higher than 2/3rds of receive transducer resonance peak frequency values.
4. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, acoustic signals are surveyed for the complete section face, calculate real-time velocity of wave, obtain complete section face velocity of wave variation diagram, and calculate
The average velocity of wave in complete section face is arrived, specially：
Acoustic signals are surveyed for the complete section face, according to then with sound detecting pipe tube pitch, calculate real-time velocity of wave, according to each to be measured
The real-time velocity of wave average computation of point obtains the average velocity of wave in complete section face, while obtaining complete section face velocity of wave variation diagram.
5. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, Fourier transformation is carried out for complete section face actual measurement acoustic signals, obtain complete section face acoustic signals spectrogram, specifically
For：
The real-time acoustic signals in complete section face are obtained using the sonic apparatus, and carries out complete section face Fourier transformation, obtain complete section face each
Tested point acoustic signals spectrogram.
6. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, according to the characteristic frequency of estimating that the average velocity of wave in complete section face and design stake footpath calculate each tested point, and using scale in institute
State and continuously identified in the acoustic signals spectrogram of complete section face automatically, specially：
Using formula fm=kca/2DdThat asked for estimates characteristic frequency, wherein fmCharacteristic frequency value is estimated for asked for, k is correction
Coefficient takes, k=1.0, caFor the average velocity of wave in complete section face, DdFor Known designs stake footpath.
7. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, according to the complete section face acoustic signals spectrogram, actual characteristic frequency is found near characteristic frequency value in described estimating
It is worth, the mark being automatically performed described in modification forms actual characteristic Frequency Identification figure, specially：
In the complete section face acoustic signals spectrogram, search near characteristic frequency resonance peak in described estimating, obtain real
Characteristic frequency is simultaneously identified, and forms complete section face actual characteristic Frequency Identification figure.
8. the sound detecting pipe buckling phenomenon recognition methodss for being used for pile detection sound wave transmission method as claimed in claim 1 or 2, which is special
Levy and be, extract velocity of wave abnormal area in the complete section face velocity of wave variation diagram, and with the complete section face actual characteristic Frequency Identification
Figure is compared, and distinguishes bend pipe effect and pile defect, specially：
Compare the complete section face velocity of wave variation diagram and the complete section face actual characteristic Frequency Identification figure, if anomaly of wave velocity region reality
Border characteristic frequency is normal, then belong to bend pipe effect, and its anomaly of wave velocity is unrelated with pile quality；If the low region actual characteristic of velocity of wave
Frequency estimates characteristic frequency more than 10% described in being generally higher by, then the low region of the velocity of wave has pile quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251975.7A CN106501368B (en) | 2016-12-30 | 2016-12-30 | A kind of sound detecting pipe buckling phenomenon recognition methods for pile detection sound wave transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611251975.7A CN106501368B (en) | 2016-12-30 | 2016-12-30 | A kind of sound detecting pipe buckling phenomenon recognition methods for pile detection sound wave transmission method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106501368A true CN106501368A (en) | 2017-03-15 |
| CN106501368B CN106501368B (en) | 2019-09-10 |
Family
ID=58334690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611251975.7A Expired - Fee Related CN106501368B (en) | 2016-12-30 | 2016-12-30 | A kind of sound detecting pipe buckling phenomenon recognition methods for pile detection sound wave transmission method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106501368B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115884A (en) * | 2018-09-27 | 2019-01-01 | 广州市建筑科学研究院有限公司 | A kind of foundation pile integrity detection system based on sound wave transmission method |
| CN113076817A (en) * | 2021-03-17 | 2021-07-06 | 上海展湾信息科技有限公司 | Weld pore defect real-time detection method and system |
| CN113431107A (en) * | 2021-07-27 | 2021-09-24 | 陈皋 | Method for detecting cast-in-place pile by correcting distance between sound measuring tubes in cast-in-place pile through vector model |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002181951A (en) * | 2000-12-13 | 2002-06-26 | Shimizu Corp | Method for non-destructively inspecting foundation pile |
| CN102313778A (en) * | 2011-07-27 | 2012-01-11 | 北京市康科瑞工程检测技术有限责任公司 | Apparatus for detecting integrity of foundation pile by using acoustic transmission method and detection method used therein |
| CN104264718A (en) * | 2014-08-29 | 2015-01-07 | 汕头大学 | Pile foundation integrality detection method |
-
2016
- 2016-12-30 CN CN201611251975.7A patent/CN106501368B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002181951A (en) * | 2000-12-13 | 2002-06-26 | Shimizu Corp | Method for non-destructively inspecting foundation pile |
| CN102313778A (en) * | 2011-07-27 | 2012-01-11 | 北京市康科瑞工程检测技术有限责任公司 | Apparatus for detecting integrity of foundation pile by using acoustic transmission method and detection method used therein |
| CN104264718A (en) * | 2014-08-29 | 2015-01-07 | 汕头大学 | Pile foundation integrality detection method |
Non-Patent Citations (2)
| Title |
|---|
| 朱正: "基桩超声波检测频域分析的应用研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 胡在良等: "时域频域法联合判定桩身完整性的应用研究", 《铁道建筑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115884A (en) * | 2018-09-27 | 2019-01-01 | 广州市建筑科学研究院有限公司 | A kind of foundation pile integrity detection system based on sound wave transmission method |
| CN113076817A (en) * | 2021-03-17 | 2021-07-06 | 上海展湾信息科技有限公司 | Weld pore defect real-time detection method and system |
| CN113431107A (en) * | 2021-07-27 | 2021-09-24 | 陈皋 | Method for detecting cast-in-place pile by correcting distance between sound measuring tubes in cast-in-place pile through vector model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106501368B (en) | 2019-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10253615B2 (en) | Method and a system for ultrasonic inspection of well bores | |
| CN103344288B (en) | A kind of transit-time ultrasonic flow meter measuring method analyzed based on zero point | |
| CN100395547C (en) | System for testing quality of cast in place concrete pile | |
| CN105805563B (en) | Based on the supersonic detection device and method with road spy pipe leakage and blocking | |
| CN109190272B (en) | Concrete structure defect detection method based on elastic waves and machine learning | |
| CN104360046B (en) | Comprehensive geophysical-prospecting combined diagnosis method for hidden danger inside wharf concrete structure | |
| CN106501368B (en) | A kind of sound detecting pipe buckling phenomenon recognition methods for pile detection sound wave transmission method | |
| CN110455917B (en) | Concrete crack repair quality detection method | |
| CN110954033A (en) | Concrete crack depth detection method and system | |
| CN111487315A (en) | Audio frequency nondestructive testing method for tunnel lining thickness and void | |
| CN109958432B (en) | Method and device for evaluating cementing quality of well cementation II interface by utilizing ultrasonic echo logging | |
| CN106770668B (en) | Method for detecting quality of single-hole foundation pile by acoustic transmission method | |
| CN210621786U (en) | Improved structure of foundation pile guide wheel by ultrasonic transmission method | |
| CN106767583B (en) | Longitudinal profile Equivalent Pile diameter calculation method for pile detection sound wave transmission method | |
| CN106546661A (en) | A kind of paired inside concrete imaging method of interference ultrasonic synthetic aperture | |
| JP5815921B2 (en) | Defect evaluation apparatus for underground structure, defect evaluation method for underground structure, and defect evaluation program for underground structure | |
| CN205352653U (en) | Accurate ranging system of supersound in low speed wind tunnel | |
| CN110886329A (en) | Device for detecting perpendicularity of pile foundation and application method thereof | |
| CN110750863B (en) | Foundation pile wave impedance inversion analysis method based on cubic B spline interpolation function | |
| JP2008070388A (en) | Liquid level detection method by means of sound and its device | |
| JP5612535B2 (en) | Material judgment method of laying cast iron pipe and laying cast iron pipe material judgment system | |
| JP5335182B2 (en) | Broadband ultrasonic exploration method for concrete underground power pole based on macroscopic exploration theory | |
| CN209821382U (en) | Dynamic plane height measurement sensor and height measurement system | |
| CN111399038B (en) | Slope parameter extraction method and device and computer readable storage medium | |
| CN105300654A (en) | Ultrasonic precise range finding system in low speed wind tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20191230 |