CN109632948B - A method of along pulp duct unilateral side ultrasound checking sleeve grouting full weight - Google Patents
A method of along pulp duct unilateral side ultrasound checking sleeve grouting full weight Download PDFInfo
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- CN109632948B CN109632948B CN201811533201.2A CN201811533201A CN109632948B CN 109632948 B CN109632948 B CN 109632948B CN 201811533201 A CN201811533201 A CN 201811533201A CN 109632948 B CN109632948 B CN 109632948B
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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
- G01N29/02—Analysing fluids
Abstract
The invention discloses a kind of methods along pulp duct unilateral side ultrasound checking sleeve grouting full weight, grouting material end face in pulp duct close to prefabricated components surface side is arranged to ultrasound detection face, ultrasound detection face has even curface and is vertically arranged with pulp duct；Include following detecting step: ultrasound detection face arrange ultrasonic transducer, ultrasonic transducer can simultaneously excitation ultrasound wave and receive ultrasonic wave；After ultrasonic transducer excitation ultrasound wave, ultrasonic wave is propagated along pulp duct to the prefabricated components back side, and when sleeve grouting is full, ultrasonic wave reflects at the prefabricated components back side, when sleeve grouting is not full, ultrasonic wave is scattered in pulp duct close to the grouting material defect end of sleeve side；The echo-signal of ultrasonic transducer reception ultrasonic wave；Can be according to whether there is apparent echo-signal judgement grouting full weight in the corresponding regional scope in pulp duct.Whether the present invention can lossless, rapidly and effectively detect sleeve grouting full.
Description
Technical field
The present invention relates to assembled architecture technical fields, and in particular to one kind is along pulp duct unilateral side ultrasound checking set
The method of cylinder grouting full weight.
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.
Grout sleeve connection is one of main connection type of reinforcing bar in current prefabricated assembled concrete structure, and the technology is logical
Cross dedicated grout sleeve and realize that reinforcing bar connect with high-intensitive contraction-free grouting concrete, have quick construction, stress simply, additional stress
The advantages that small, 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, if being in the milk insatiable hunger inside grout sleeve
Full, the estimated performance of design will be not achieved in reinforcing bar connection, then may bring serious structure security risk.
In the construction process, spillage, few the case where filling, blocking, happen occasionally inside grout sleeve, and grout sleeve connects matter
It measures undesirable engineering problem also to be reported, grouting plumpness problem especially be paid close attention to when the acceptance of work.Due to reinforcing bar
Sleeve grouting connecting structure is complicated to belong to concealed work again, and grouting plumpness detection is problem generally acknowledged both at home and abroad.
Currently, existing sleeve grouting plumpness detection method mainly includes three categories: pre-buried detection method, non-destructive testing
Method, local damage detection method.
Built-in fitting is arranged during grouting construction in pre-buried detection method needs, as pre-buried sensor method, pre-buried steel wire are drawn
Pull out method, by detection insertion sleeve grout outlet in built-in fitting whether by grouting material cladding come judge be in the milk full weight.By reinforcing bar
The influence of position, when reinforcing bar biases and is close to the inner wall of sleeve grout outlet side, built-in fitting can not protrude into barrel bore；It is pre-buried
The built-in fitting higher cost of sensor method can not recycle after pre-buried, and after overfall, remain slurry on Sensor core element
Hardening may cause erroneous judgement；Pre-buried steel wire hubbing is because indwelling is too long outside prefabricated components surface for steel wire drawing section, before detection
Vulnerable to scene disturbance or destroy.In addition, the greatest problem of pre-buried detection method is can not to carry out random sampling detection to engineering,
Cause the position that built-in fitting is set that can finely be constructed, and the quality at remaining position is easier to adverse consequences out of control.
Lossless detection method is not take any pre-buried measure in advance, is directly tested on prefabricated components surface, is such as rushed
Hit echo method, x-ray method, ultrasound computed tomography method, conventional ultrasound method.Impact echo can be found that grouting is not full to a certain extent
The case where, but there are errors with actual conditions for quantitative result, and it is still immature in general；X-ray method is limited to Portable X-ray
The penetration capacity of machine is only applicable to sleeve between two parties at present or the 200mm thickness precast shear wall sleeve grouting of quincuncial pile arrangement is full
Degree detection, and personnel must be carried out in radiation scope when detection and cleared out a gathering place；Though ultrasound computed tomography method can conveniently and efficiently qualitative detection, if
There are small to come to nothing between sleeve and outer concrete or between sleeve and internal grouting material, will lead to judge by accident, will be in the milk
Full sleeve is surveyed into empty set；Conventional ultrasound method is that the concrete surface in prefabricated components two sides carries out ultrasound to survey, due to
It is influenced by various factors couplings such as concrete, reinforcing bar, sleeve, grouting material, insulating layers, especially ultrasonic wave is most probably along sleeve wall
It detours and does not enter sleeve inner, cause this non-destructive testing technology to be made slow progress, on going result, which is not able to satisfy engineering still, to be made
With requiring.
Local damage detection method is carried out again after rejecting concrete cover on the outside of sleeve or all around stems concrete
Detection, researcher proposes local damage X-ray detection method for the limitation of lossless detection method in succession, sleeve surface surpasses
Sound and sleeve surface excitation method.Local damage X-ray detection method is that the sleeve back side is enable to place imaging plate, picks chisel concrete
Range is big, and scene should not operate, and other limitations of x-ray method still have；Sleeve surface ultrasound and sleeve surface exciting
Method needs the sleeve for different size model to do preparatory rating test, and efficiency is lower, and manual operation factor is affected.
Therefore, need to research and develop it is a kind of can be quickly and effectively detected sleeve grouting whether full lossless detection method.
Summary of the invention
It is in the milk and satisfies along pulp duct unilateral side ultrasound checking sleeve the technical problem to be solved in the present invention is to provide one kind
Whether full the method for full property can lossless, rapidly and effectively detect sleeve grouting.
In order to solve the above-mentioned technical problems, the present invention provides one kind to fill along pulp duct unilateral side ultrasound checking sleeve
The method for starching full weight, is provided with pulp duct between sleeve grout outlet and prefabricated components surface grout outlet, by pulp duct
The grouting material end face of interior close prefabricated components surface side is arranged to ultrasound detection face, and the ultrasound detection face has smooth table
Face, the pulp duct are vertically arranged with ultrasound detection face；
Include following detecting step:
Arrange that ultrasonic transducer, the ultrasonic transducer can excite simultaneously on ultrasound detection face on ultrasound detection face
Ultrasonic wave and reception ultrasonic wave；
After ultrasonic transducer excitation ultrasound wave, ultrasonic wave is propagated along pulp duct to the prefabricated components back side, when sleeve fills
When starching full, without cavity zone within the scope of the propagation path of ultrasonic wave, ultrasonic wave reflects at the prefabricated components back side, works as sleeve
When being in the milk not full, there is cavity zone within the scope of the propagation path of ultrasonic wave, ultrasonic wave is in pulp duct close to sleeve side
Grouting material defect end scatter；The ultrasonic transducer receives the echo-signal of ultrasonic wave；
Full weight of being in the milk is judged according to whether having apparent echo-signal in the corresponding regional scope in pulp duct.
Further, the pulp duct is vertical with prefabricated components surface, and the pulp duct prepares shape by the hard straight tube of PVC
At in prefabricated components manufacturing process, by adding pulp duct positioning mold, pulp duct positioning mould above sleeve
The tool positioning hard straight tube of PVC, by pulp duct and prefabricated components surface vertical calibration.
Further, the ultrasound detection face is located at the inside of prefabricated components surface grout outlet, smooth ultrasound detection face
It obtains in the following manner:
Before grouting terminates, capable closure is filled in by blocking in prefabricated components surface grout outlet, blocks to fill in be located at and fills in end one
The surface of side should be plane, and the plug that blocks is the mold for forming smooth ultrasound detection face.
Further, the ultrasonic transducer diameter is less than or equal to 15 ㎜, and length is more than or equal to 10 ㎜, and frequency is less than or equal to
1MHz。
Further, the obvious degree of the echo-signal includes the amplitude size of the echo-signal, is being gone out when detection
It starches in the corresponding regional scope in duct, apparent echo-signal occurs, and the position is made an uproar when the amplitude of echo-signal is more than empty survey
2 times of sound amplitude, i.e. grouting material defect end of the judgement ultrasonic wave in pulp duct close to sleeve side scatter, thus
Obtain being in the milk not full conclusion.
Further, echo-signal is shown by waveform display screen, pulp in reference axis when the sound of waveform display screen
The corresponding regional scope in duct is determined by following steps:
Burial place of the step 1) according to sleeve in prefabricated components determines the length L in pulp duct1；
Step 2) uses gage measuring ultrasound detection face to the vertical range L on prefabricated components surface2；
Step 3) calculates the critical length of pulp duct entoplasm body when sleeve is in the milk not full according to step 1) and step 2)
L, wherein L=L1-L2；
The reference velocity of sound v and velocity of sound variation coefficient β that step 4) is propagated in grouting material according to ultrasonic wave convert；
When sleeve grouting is not full, ultrasonic wave is sent out by the grouting material defect end in pulp duct close to sleeve side
Raw scattering, after scattering, ultrasonic transducer receives echo-signal, time t needed for the slurry under the round-trip critical length of ultrasonic wave
=2L/ (β v), when β takes the minimum value β in its variation rangeminWhen, the corresponding velocity of sound is minimum, the round-trip critical length of ultrasonic wave
Under slurry needed for it is most loud when:
tmax=2L/ (βmin·v)；
When the sound of waveform display screen in reference axis noise range starting point to tmaxThe as corresponding regional scope in pulp duct.
Further, before detection, the grouting material condensation hardening in sleeve is more than or equal to 3 days.
Further, when determining that grouting is not full, it is quantitative that grouting plumpness is carried out using 3 D stereo measurement endoscope
It examines, steps are as follows:
Step 1) is drilled using drilling device along pulp duct, production detection duct；
Step 2) 20 ㎜ -30 ㎜ of every advance, pausing operation, using cleaning equipment to detection duct in grouting material debris and
Powder is cleared up；
Step 3) slows down rate of penetration when apart from sleeve grout outlet less than 20 ㎜, 3 ㎜ -5 ㎜ of every advance, pausing operation,
Using cleaning equipment in sense channel grouting material debris and powder clear up, observation drilling situation, until detection duct
Run through；
The side view of 3 D stereo measurement endoscope is measured camera lens and seen down from detection duct feeding barrel bore by step 4)
It surveys, measures the length of grouting defect area, convert to obtain grouting plumpness further according to the length of grouting defect area.
Beneficial effects of the present invention:
1, the present invention is emitting ultrasonic wave along pulp duct and in such a way that launch point receives ultrasonic echo, in sleeve
Under the not full operating condition of being in the milk, the media environment in ultrasonic wave propagation path is simplified as single grouting material, is believed according to echo
Number position and power judge full weight of being in the milk, not by the interference of other media in prefabricated components, fill supercritical ultrasonics technology detection
Slurry full weight is from being very unlikely to become possibility.
2, detection method of the invention is not limited by prefabricated components spatial position, sleeve arrangement, as long as there is unilateral side
Operating surface, can be detected, solve the puzzlement that exterior wall is difficult to detect, and it is fast, high-efficient to detect speed；
3, detection method of the invention is a kind of lossless detection method, will not be damaged to component connecting portion, and is gone out
Slurry mouth, which blocks plug, can also serve as the molding die in ultrasound detection face, not will increase any testing cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reinforced bar sleeve grouting connection of the present invention；
Fig. 2 is the full state ultrasound detection schematic diagram of present invention grouting；
Fig. 3 is the not full state ultrasound detection schematic diagram of present invention grouting；
Fig. 4 is that A when ultrasonic transducer sky of the present invention is surveyed sweeps waveform diagram；
Fig. 5 is that present invention A of ultrasonic transducer test when being in the milk not full sweeps waveform diagram；
Fig. 6 is that present invention A of ultrasonic transducer test when being in the milk full sweeps waveform diagram.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Fig. 1 gives the structural schematic diagram of reinforced bar sleeve grouting connection, including prefabricated components 1, is embedded in prefabricated components
Sleeve 2, the upper and lower side of sleeve is inserted into upper reinforcement and lower rebar respectively, goes out in sleeve grout outlet 3 and prefabricated components surface
It is provided with pulp duct 5 between slurry mouth 4, is in the milk between mouth 6 and prefabricated components grout surface mouth 7 in sleeve and is provided with grouting duct
8, when carrying out grouting connection, high-intensitive contraction-free grouting concrete 9 is poured by duct 8 of being in the milk, grouting material undetermined is flowed from pulp duct
Stop grouting after out, the connection of upper reinforcement and lower rebar is realized after grouting material condensation hardening, grouting material is full in sleeve
Bonding strength of the Degree of Accord Relation to upper reinforcement and lower rebar；In this application, close to prefabricated components surface in pulp duct
The grouting material end face of side is ultrasound detection face 10.
Referring to shown in Fig. 2 and Fig. 3, the side of the invention along pulp duct unilateral side ultrasound checking sleeve grouting full weight
Grouting material end face in pulp duct close to prefabricated components surface side is arranged to ultrasound detection face, surpassed by one embodiment of method
Sound detection face has even curface, convenient for the abutting of ultrasonic transducer end, so that being had using ultrasonic energy after couplant
Effect penetrates grouting material；Wherein, pulp duct is vertically arranged with ultrasound detection face, by keeping vertical angle, so that ultrasound is changed
The ultrasonic wave that energy device issues is sent along the axial direction in pulp duct, to guarantee that the echo of ultrasonic wave also can be returned axially
It passes；
Before detection, the grouting material condensation in general sleeve hardens and reaches some strength and needs to be more than or equal to 3 days, guarantees
The speed that ultrasonic wave is propagated in grouting material is about 4000m/s with reference to velocity of sound v close to velocity of sound v is referred to.
Specifically, including following detecting step:
Ultrasonic transducer 11 is first arranged on ultrasound detection face, ultrasonic transducer has transmitting and receive capabilities, i.e., super
On sound detection face can simultaneously excitation ultrasound wave and receive ultrasonic wave；
After ultrasonic transducer excitation ultrasound wave, ultrasonic wave is propagated along pulp duct to the prefabricated components back side, when sleeve fills
When starching full, without cavity zone within the scope of the propagation path of ultrasonic wave, ultrasonic wave reflects at the prefabricated components back side 12, works as set
When cylinder grouting is not full, there is cavity zone 13 within the scope of the propagation path of ultrasonic wave, ultrasonic wave is in pulp duct close to sleeve
The grouting material defect end 14 of side scatters；The echo-signal of ultrasonic transducer reception ultrasonic wave；
Full weight of being in the milk is judged according to whether having apparent echo-signal in the corresponding regional scope in pulp duct；Its
In, when sleeve grouting it is not full when, ultrasonic wave can only in pulp duct grouting material at the terminal surface of barrel bore side
It scatters, apparent echo-signal can be generated；When sleeve grouting is full, grouting ultrasonic wave is propagated to the prefabricated components back side
And during through prefabricated components backside reflection returning to ultrasound detection face, supersonic sounding is longer propagate in addition on the way through grouting material with
Multiple Scattering and reflection occur for reinforcing bar interface, grouting material and socket interface, sleeve and concrete interface, and the energy of ultrasonic wave declines
Subtracting causes echo-signal weaker.Therefore grouting full weight can determine to the judgement of echo-signal.
Wherein, the obvious degree of echo-signal includes the amplitude size of the echo-signal, when detection in pulp duct pair
In the regional scope answered, there is apparent echo-signal, and the amplitude of echo-signal is more than 2 of position noise amplitude when sky is surveyed
Times when, i.e. judgement ultrasonic wave scatters in pulp duct close to the grouting material defect end of sleeve side, is thus filled
Starch not full conclusion.
With the precast shear wall of 200 ㎜ thickness, for the sleeve of certain brand GTZQ416 model, sleeve radius is 24 ㎜, sleeve
It is arranged in prefabricated components at quincuncial pile, pulp duct is vertically arranged with prefabricated components surface, and surveyed sleeve is located at ultrasound detection
The positive distal end of the prefabricated components of face side, 55 ㎜ of vertical range at the bushing core linear distance prefabricated components back side.
Echo-signal mainly passes through waveform display screen and is shown, pulp duct pair in reference axis when the sound of waveform display screen
The regional scope answered is determined by following steps:
According to burial place of the sleeve in prefabricated components, the length L in pulp duct can be calculated1=200-55-24
=121 ㎜, vertical range L of the ultrasound detection identity distance from prefabricated components surface211 ㎜ are tested to be, then when sleeve grouting is not full
The critical length L=L of pulp duct entoplasm body1-L2=121-11=110 ㎜, the reference velocity of sound that ultrasonic wave is propagated in grouting material
V=4000m/s, the value range of sonic velocity change factor beta is 0.9-1.1 under normal conditions, when β takes the minimum in its variation range
Value βminWhen=0.9, the corresponding velocity of sound is minimum, t when most loud needed for the slurry under the round-trip critical length of ultrasonic wavemax=2L/
(βminV)=(2 × 0.11)/(0.9 × 4000) 106=61 μ s, noise range starting point in reference axis when the sound of waveform display screen
It is the corresponding regional scope in pulp duct to 61 μ s.
Wherein, referring to shown in Fig. 4, A when surveying for ultrasonic transducer sky sweeps waveform, can be clearly seen that the fluctuation of waveform
Amplitude very little, and it is relatively stable.Referring to Figure 5, it can be seen that the interior reference axis in sound of the corresponding regional scope in pulp duct
There is apparent echo-signal in the upper position 33 μ s, and the amplitude of echo-signal is more than 2 times of position noise amplitude when sky is surveyed,
Therefore, it is determined that not full to be in the milk.Further, it is possible to which the reference velocity of sound propagated in grouting material according to ultrasonic wave calculates sleeve
The physical length L of pulp duct entoplasm body when being in the milk not full3, L3=(4000 × 3310-6)/2=0.066m, i.e. slurry outlet
The physical length of slurry is about 66mm in road, the critical length 110mm of pulp duct entoplasm body when not full less than sleeve grouting,
Illustrate when in sleeve grouting material occur spillage without it is full when, the grouting material in pulp duct can be also partly refluxed in sleeve
Chamber.
Referring to shown in Fig. 6, do not occur apparent echo-signal, and other regions in the corresponding regional scope in pulp duct
(61 μ s right area in reference axis when sound) does not find that apparent echo-signal occurs yet, therefore, it is determined that it is full to be in the milk, and by
This explanation when being in the milk full, propagating to the prefabricated components back side and returning to ultrasound detection through prefabricated components backside reflection by ultrasonic wave
During face, supersonic sounding is longer to be propagated on the way in addition through grouting material and reinforcing bar interface, grouting material and socket interface, sleeve
Multiple Scattering and reflection occurs with concrete interface, the energy attenuation of ultrasonic wave causes echo-signal weaker.
In one embodiment, in face of production ultrasound detection, first by pulp duct and prefabricated components surface relative position tune
Section is vertical, and pulp duct is prepared by the hard straight tube of PVC and formed, in prefabricated components manufacturing process, by adding out above sleeve
Duct positioning mold is starched, pulp duct positioning mold positions the hard straight tube of PVC, by pulp duct school vertical with prefabricated components surface
It is quasi-.
Main, ultrasound detection face is located at the inside of prefabricated components surface grout outlet, smooth ultrasound detection face by with
Under type obtains: before grouting terminates, the grout outlet on prefabricated components surface fills in capable closure by blocking, and closure plug, which is located at, to be filled in
The surface of end side should be plane, and blocking plug is the mold for forming smooth ultrasound detection face, and the plane and grouting material for blocking plug are supported
It connects, condenses the ultrasound detection face needed for hardening is formed to grouting material.
Since ultrasound detection face is located at the inside of prefabricated components surface grout outlet, and the internal diameter in pulp duct is typically small,
Therefore restrictions made to the parameter of ultrasonic transducer, diameter is less than or equal to 15 ㎜, and length is more than or equal to 10 ㎜, frequency less than etc.
In 1MHz, to meet the detection needs of conventional sleeve model.
In one embodiment, when determining that grouting is not full, it is full grouting can be carried out using 3 D stereo measurement endoscope
Full scale quantitative testing, steps are as follows:
It is drilled using drilling device along pulp duct, production detection duct；
First slightly bored, every drilling advance 20 ㎜ -30 ㎜ when, pausing operation, using cleaning equipment in detection duct
Grouting material debris and powder are cleared up；
When apart from sleeve grout outlet less than 20 ㎜, smart brill is carried out, slows down rate of penetration, when every 3 ㎜ -5 ㎜ of drilling advance,
Pausing operation, using cleaning equipment in sense channel grouting material debris and powder clear up, observation drilling situation, until
Detection duct is run through；It can be avoided in such a way that essence is bored and be largely in the milk material debris in the case of thick bore and powder enters sleeve cavity
In area, to cause difficulty to subsequent grouting plumpness quantitative detection；
After drilling, it is past from detection duct feeding barrel bore that the side view of 3 D stereo measurement endoscope is measured into camera lens
The length of grouting defect area is measured in lower observation, converts to obtain grouting plumpness further according to the length of grouting defect area.
Above embodiments are only to absolutely prove preferred embodiment that is of the invention and being lifted, and protection scope of the present invention is not
It is limited to this.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in guarantor of the invention
Within the scope of shield.Protection scope of the present invention is subject to claims.
Claims (8)
1. a kind of method along pulp duct unilateral side ultrasound checking sleeve grouting full weight, in sleeve grout outlet and prefabricated structure
Pulp duct is provided between the grout outlet of part surface, which is characterized in that by prefabricated components surface side close in pulp duct
Grouting material end face is arranged to ultrasound detection face, and the ultrasound detection face has even curface, and the pulp duct and ultrasound are examined
Survey face is vertically arranged；
Include following detecting step:
Arrange ultrasonic transducer on ultrasound detection face, the ultrasonic transducer being capable of excitation ultrasound simultaneously on ultrasound detection face
Wave and reception ultrasonic wave；
After ultrasonic transducer excitation ultrasound wave, ultrasonic wave is propagated along pulp duct to the prefabricated components back side, when sleeve grouting is full
Man Shi, without cavity zone within the scope of the propagation path of ultrasonic wave, ultrasonic wave reflects at the prefabricated components back side, when sleeve is in the milk
When not full, there is cavity zone within the scope of the propagation path of ultrasonic wave, ultrasonic wave is in pulp duct close to the filling of sleeve side
Slurry defect end scatters；The ultrasonic transducer receives the echo-signal of ultrasonic wave；
Full weight of being in the milk: the echo is judged according to whether having apparent echo-signal in the corresponding regional scope in pulp duct
Signal shown by waveform display screen, and the obvious degree of echo-signal includes the amplitude size of the echo-signal, when detection,
In the sound of waveform display screen in reference axis in the corresponding regional scope in pulp duct, the amplitude of the echo-signal of any position is super
2 times of position noise amplitude when crossing empty survey, i.e., judgement ultrasonic wave is in pulp duct close to the grouting material defect of sleeve side
End scatters, and thus obtain being in the milk not full conclusion.
2. as described in claim 1 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, the pulp duct is vertical with prefabricated components surface.
3. as claimed in claim 2 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, the pulp duct is prepared by the hard straight tube of PVC and formed, in prefabricated components manufacturing process, by adding above sleeve
Pulp duct positioning mold, pulp duct positioning mold position the hard straight tube of PVC, pulp duct and prefabricated components surface are hung down
Straight calibration.
4. as described in claim 1 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, the ultrasound detection face is located at the inside of prefabricated components surface grout outlet, and smooth ultrasound detection face is in the following manner
It obtains:
Before grouting terminates, capable closure is filled in by blocking in prefabricated components surface grout outlet, blocks to fill in be located at and fills in end side
Surface should be plane, and the plug that blocks is the mold for forming smooth ultrasound detection face.
5. as described in claim 1 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, the ultrasonic transducer diameter is less than or equal to 15 ㎜, and length is more than or equal to 10 ㎜, and frequency is less than or equal to 1MHz.
6. as claimed in claim 2 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, the corresponding regional scope in pulp duct is determined by following steps in reference axis when the sound of waveform display screen:
Burial place of the step 1) according to sleeve in prefabricated components determines the length L in pulp duct1；
Step 2) uses gage measuring ultrasound detection face to the vertical range L on prefabricated components surface2；
Step 3) calculates the critical length L of pulp duct entoplasm body when sleeve is in the milk not full according to step 1) and step 2),
Middle L=L1-L2；
The reference velocity of sound v and velocity of sound variation coefficient β that step 4) is propagated in grouting material according to ultrasonic wave convert；
When sleeve grouting is not full, ultrasonic wave occurs to dissipate by the grouting material defect end in pulp duct close to sleeve side
It penetrates, after scattering, ultrasonic transducer receives echo-signal, time t=2L/ needed for the slurry under the round-trip critical length of ultrasonic wave
(β v), when β takes the minimum value β in its variation rangeminWhen, the corresponding velocity of sound is minimum, the slurry under the round-trip critical length of ultrasonic wave
When most loud needed for body:
tmax=2L/ (βmin·v)；
When the sound of waveform display screen in reference axis noise range starting point to tmaxThe as corresponding regional scope in pulp duct.
7. as described in claim 1 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, before detection, the grouting material condensation hardening in sleeve is more than or equal to 3 days.
8. as described in claim 1 along the method for pulp duct unilateral side ultrasound checking sleeve grouting full weight, feature
It is, when determining that grouting is not full, grouting plumpness quantitative testing is carried out using 3 D stereo measurement endoscope, uses drilling
Equipment drills along pulp duct, and production detection duct, steps are as follows:
Step 1) 20 ㎜ -30 ㎜ of every advance, pausing operation, using cleaning equipment to the grouting material debris and powder in detection duct
It is cleared up；
Step 2) slows down rate of penetration, 3 ㎜ -5 ㎜ of every advance when apart from sleeve grout outlet less than 20 ㎜, and pausing operation uses
Cleaning equipment in sense channel grouting material debris and powder clear up, observation drilling situation, until detection duct run through；
The side view of 3 D stereo measurement endoscope is measured camera lens and observed down from detection duct feeding barrel bore by step 3), is surveyed
The length of grouting defect area out converts to obtain grouting plumpness further according to the length of grouting defect area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811533201.2A CN109632948B (en) | 2018-12-14 | 2018-12-14 | A method of along pulp duct unilateral side ultrasound checking sleeve grouting full weight |
| PCT/CN2019/121539 WO2020119468A1 (en) | 2018-12-14 | 2019-11-28 | Method for detecting grout plumpness of sleeve cylinder with single-sided ultrasound detection along grout outlet channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811533201.2A CN109632948B (en) | 2018-12-14 | 2018-12-14 | A method of along pulp duct unilateral side ultrasound checking sleeve grouting full weight |
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| CN109632948B true CN109632948B (en) | 2019-11-26 |
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| CN109632948B (en) * | 2018-12-14 | 2019-11-26 | 昆山市建设工程质量检测中心 | A method of along pulp duct unilateral side ultrasound checking sleeve grouting full weight |
| CN113702504B (en) * | 2020-07-28 | 2023-06-20 | 广州建筑产业研究院有限公司 | Sleeve grouting fullness detection method and computer equipment |
| CN112098514B (en) * | 2020-09-15 | 2021-06-18 | 交通运输部公路科学研究所 | Method for quantitatively judging grouting condition of prestressed pipeline based on three levels of dotted line body |
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