CN109470770A - A method of detecting concrete structure continuously a plurality of diagonal crack - Google Patents
A method of detecting concrete structure continuously a plurality of diagonal crack Download PDFInfo
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- CN109470770A CN109470770A CN201811342317.8A CN201811342317A CN109470770A CN 109470770 A CN109470770 A CN 109470770A CN 201811342317 A CN201811342317 A CN 201811342317A CN 109470770 A CN109470770 A CN 109470770A
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- G—PHYSICS
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- 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
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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
- G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
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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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4472—Mathematical theories or simulation
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- G01—MEASURING; TESTING
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- G—PHYSICS
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- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02854—Length, thickness
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- 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
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Abstract
The invention discloses the present invention disclose a kind of method for detecting the continuous a plurality of diagonal crack of concrete structure, ultrasonic detector is measured first in the velocity of sound in concrete structure and the distance between each crack, functional relation when then by establishing sound that ultrasonic detector transmitting terminal, each diagonal crack and receiving end the distance between successively, repeatedly measure between the angle depth of each diagonal crack, the numerical value measured every time is brought into and is calculated, the angle and depth of each diagonal crack can be acquired.The problems such as this method is able to solve can not carry out the measurement of a plurality of diagonal crack in the prior art, existing bielliptic(al) method survey calculation intricate operation and error are big measures simple and convenient, and precision is high, and workload is small.
Description
Technical field
The present invention relates to concrete structure diagonal crack detection fields, especially a kind of to use coagulation in concrete structural surface
The method of the nonmetallic detector test concrete structure of soil continuously a plurality of diagonal crack angle and depth, specifically a kind of detection
The method of the continuous a plurality of diagonal crack of concrete structure.
Background technique
Concrete surface crack is that one of the most common type is damaged in concrete material, it can reduce the durable of concrete structure
Property and safety.The destruction of many concrete structures is also all since crack.In practical projects, concrete structural surface
Fractue spacing, fracture width etc. be readily inspected and measure, but the angle in crack and depth due to inside concrete and with
Machine is big, can only be detected by the method without damaged or local damage.
In the prior art, the flat survey method in inside concrete crack mainly has the flat survey method of vertical fracture single side and diagonal crack double
Oval positioning mode.Wherein, due under virtual condition distress in concrete be all substantially diagonal crack, vertical fracture belongs to the one of diagonal crack
The extremely special situation of kind, so it is impossible to meet want for the application range of the flat survey method of vertical fracture single side and the effect of measurement
It asks.In real work, middle technical staff mainly uses bielliptic(al) positioning mode to measure the angle and depth of diagonal crack.
Bielliptic(al) positioning mode is primarily present three problems:
1, it when calculating diagonal crack angle and depth using this method, needs to draw ellipse on graph paper, then carry out again
It calculates, step is comparatively laborious, and workload is bigger.
If 2, ultrasonic wave transmitting probe and receive probe inset spacing is excessive for the depth of diagonal crack or mistake
Small, then calculated resultant error is bigger.
3, bielliptic(al) method is commonly used to calculate the depth and angle in monocline crack, the case where for continuous multiple diagonal cracks but
It can not calculate, limit bigger.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to above-mentioned state of the art, and providing can be in concrete structure
Continuous a plurality of diagonal crack measures calculating, and measurement accuracy is high, a kind of simple detection concrete structure of method is continuously more
The method of diagonal crack.
The technical scheme of the invention to solve the technical problem is:
A method of the continuous a plurality of diagonal crack of detection concrete structure, including the ultrasonic detector for measurement,
Be characterized in: the ultrasonic detector is by emitting ultrasonic wave to a plurality of diagonal crack present in concrete structure while carrying out
Measurement；The method the following steps are included:
A), first with ultrasonic detector, the complete area in the concrete structure measure not across seam, in terms of
Calculate velocity of sound v of the ultrasonic wave of ultrasonic detector transmitting in the concrete complete area；
B), determine a plurality of diagonal crack for needing to measure, the transmitting terminal of ultrasonic detector is then placed on concrete knot
The side for a plurality of diagonal crack that structure surface needs to measure, the receiving end of ultrasonic detector, which is placed on concrete structural surface, to be needed
Transmitting terminal, first diagonal crack, Article 2 oblique segmentation are successively recorded in the other side for a plurality of diagonal crack to be measured in order
Seam ... nth diagonal crack and receiving end the distance between successively, are denoted as a respectively11,a2,a3...,an,a10；It is at this time first
Beginning state；N is the natural number more than or equal to 2；
C), start ultrasonic detector, record original state when sound when；
D), same straight line is in position and the initial position of the transmitting terminal and receiving end that keep ultrasonic detector
Under the premise of upper, mobile 2n transmitting terminal and receiving end, when record moves each time, transmitting terminal is at a distance from first diagonal crack
ai1, the last one diagonal crack and receiving end distance ai0And measure sound when ti, wherein i represents mobile number, initial rank
Duan Wei 1 time；Since the distance between each diagonal crack is constant, i.e. a2,a3...,anFor constant；If desired multiple measurement results
It is verified, moves 2n+1 times, can be obtained 2n measurement result, can be used for Comparative result or verifying；
E), by the distance between each diagonal crack a2,a3...,an, each time it is mobile when ai1And ai0Value and each time shifting
T when sound when dynamici, substitute into and contain each diagonal crack angle, θnWith depth lnIn the 2n member equation group of unknown quantity, each oblique segmentation can be acquired
Stitch angle, θnWith depth ln；Wherein, θnRefer to that nth diagonal crack is rotated clockwise past around concrete structural surface cracking point
Transmitting terminal angle experienced, lnRefer to the depth of nth diagonal crack.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
The establishment process of above-mentioned 2n member equation group is as follows:
A), the transmitting terminal of ultrasonic detector and the linear distance on first diagonal crack vertex are calculated, if distance is Ai1,
Then distance
B), the receiving end of ultrasonic detector and the linear distance on the last item diagonal crack vertex are calculated, if distance is Ai0,
Then distance
C), the linear distance between the (n-1)th crack vertex and nth crack vertex is calculated, if linear distance is An, then
Distance
D), 2n member equation group is established are as follows:
E), special case works as n=1 when only single diagonal crack, need to only move transmitting terminal and the receiving of ultrasonic detector
End twice, when recording each sound t and it is mobile every time when ai1And ai0, the angle and depth of the diagonal crack can be calculated；
2 yuan of equations at this time are as follows:
The realization condition of the above method are as follows:
1), the crack in concrete structure is extended in one direction, and angle is single；
2), in concrete structure diagonal crack depth be much larger than diagonal crack width.
Compared with prior art, it is cumbersome to can solve concrete structure single diagonal crack survey calculation in the prior art by the present invention
The problem of, and the problem of be unable to measure in concrete structure continuous a plurality of diagonal crack angle and depth.Compared to current pair
Oval positioning mode, the present invention have the characteristics that measurement accuracy is high, method is easy, measurement result can be calculated by formula and to survey
It measures result and carries out proving and comparisom, reduce the workload of people's measurement.
Detailed description of the invention
Fig. 1 is the schematic illustration of bielliptic(al) method in the prior art；
Fig. 2 is the schematic illustration of detection method.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Fig. 2 is the schematic illustration of detection method, in figure: T is the transmitting terminal of ultrasonic detector, R is ultrasound
The receiving end of wave detector.
Ultrasonic wave direction as shown in arrow in Fig. 2 of the invention of transmitting terminal T transmitting carries out shortest path transmitting arrival and connects
Receiving end R.The a length of vt in entire path passed through at this timei。
Traditional technical method can only measure calculating to the single diagonal crack in concrete structure, and the present invention then can
Single diagonal crack in concrete structure measures calculating, also can to the continuous a plurality of diagonal crack in concrete structure simultaneously into
Row survey calculation.The present invention detects concrete structure, and continuously measuring tool used by the method for a plurality of diagonal crack is that ultrasonic wave is examined
Instrument detection is surveyed, a plurality of diagonal crack present in concrete structure is surveyed simultaneously using the ultrasonic wave of ultrasonic detector transmitting
Amount；It is assumed here that a plurality of diagonal crack in concrete structure is n item, n is the natural number more than or equal to 2.It is then of the invention
Steps are as follows for measurement method:
A), first with ultrasonic detector, the complete area in the concrete structure measure not across seam, in terms of
Calculate velocity of sound v of the ultrasonic wave of ultrasonic detector transmitting in the concrete complete area；
B), determine a plurality of diagonal crack for needing to measure, the transmitting terminal T of ultrasonic detector is then placed on concrete knot
The side for a plurality of diagonal crack that structure surface needs to measure, is placed on concrete structural surface for the receiving end R of ultrasonic detector
Transmitting terminal T, first diagonal crack, Article 2 oblique segmentation are successively recorded in the other side for a plurality of diagonal crack for needing to measure in order
Seam ... nth diagonal crack and receiving end R the distance between successively, are denoted as a respectively11,a2,a3...,an,a10；It is at this time
Original state.
I.e. in the initial state, the distance between transmitting terminal T and first diagonal crack are denoted as a11, first article of diagonal crack and
The distance between two diagonal cracks are denoted as a2, the distance between Article 2 diagonal crack and Article 3 diagonal crack are denoted as a3, and so on
The distance between (n-1)th diagonal crack and nth diagonal crack are denoted as an, the distance between n-th diagonal crack and receiving end R note
For a10.Mandatory declaration a herein11" 11 " in be located at front " 1 " and a10" 10 " in be located at front " 1 ", represent
Meaning is the meaning of initial first time.
Such as when initially placing transmitting terminal T for the first time, the distance between transmitting terminal T and first diagonal crack are denoted as a11, when
When second of mobile placement transmitting terminal T, the distance between transmitting terminal T and first diagonal crack are denoted as a21, when third time movement is put
When setting transmitting terminal T, the distance between transmitting terminal T and first diagonal crack are denoted as a31, and so on.
C), start ultrasonic detector, record original state when sound when；
D), straight in same when keeping position and the initial position of transmitting terminal T and receiving end R of ultrasonic detector
Under the premise of on line, mobile 2n transmitting terminal T and receiving end R, when record moves each time, transmitting terminal T and first diagonal crack
Distance ai1, the last one diagonal crack and receiving end R distance ai0And measure sound when ti, wherein i represents mobile time
Number, initial stage are the 1st time；Since the distance between each diagonal crack is constant, i.e. a2,a3...,anFor constant；If desired multiple
Measurement result is verified, and is moved 2n+1 times, be can be obtained 2n measurement result, can be used for Comparative result or verifying；
E), by the distance between each diagonal crack a2,a3...,an, each time it is mobile when ai1And ai0Value and each time shifting
T when sound when dynamici(being known numeric value) substitutes into and contains each diagonal crack angle, θnWith depth lnIn the 2n member equation group of unknown quantity,
Each diagonal crack angle, θ can be acquirednWith depth ln；Wherein, θnRefer to that nth diagonal crack cracks around concrete structural surface
Point rotates clockwise past transmitting terminal angle experienced, lnRefer to the depth of nth diagonal crack.
The method of the continuous a plurality of diagonal crack of detection concrete structure of the invention measures ultrasonic detector mixed first
The distance between velocity of sound and each crack in Xtah Crude Clay structure, it is then oblique by establishing ultrasonic detector transmitting terminal, each item
Crack and receiving end the distance between successively, the sound that repeatedly measures when and the angle depth of each diagonal crack between function close
System, brings the numerical value measured every time into 2n member equation group and calculates, can acquire the angle and depth of each diagonal crack.
The establishment process of 2n member equation group of the invention is as follows:
A), the transmitting terminal of ultrasonic detector and the linear distance on first diagonal crack vertex are calculated, if distance is Ai1,
Then distance
B), the receiving end of ultrasonic detector and the linear distance on the last item diagonal crack vertex are calculated, if distance is Ai0,
Then distance
C), the linear distance between the (n-1)th crack vertex and nth crack vertex is calculated, if linear distance is An, then
Distance
D), 2n member equation group is established are as follows:
E), special case works as n=1 when only single diagonal crack, need to only move transmitting terminal and the receiving of ultrasonic detector
End twice, when recording each sound t and it is mobile every time when ai1And ai0, the angle and depth of the diagonal crack can be calculated；
2 yuan of equations at this time are as follows:
The realization condition of the method for the present invention are as follows:
1), the crack in concrete structure is extended in one direction, and angle is single；
2), in concrete structure diagonal crack depth be much larger than diagonal crack width.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, any ripe
Professional and technical personnel is known, without departing from the scope of the present invention, according to the technical essence of the invention, to the above reality
Any simple modifications, equivalent substitutions and improvements etc. made by example are applied, it is fallen within the scope of protection of the technical scheme of the present invention
It is interior.
Claims (3)
1. a kind of method of the continuous a plurality of diagonal crack of detection concrete structure, special including the ultrasonic detector for measurement
Sign is: the ultrasonic detector to a plurality of diagonal crack present in concrete structure while being surveyed by emitting ultrasonic wave
Amount；The method the following steps are included:
A), first with ultrasonic detector, the complete area in the concrete structure measure not across seam, to calculate
Velocity of sound v of the ultrasonic wave of ultrasonic detector transmitting in the concrete complete area；
B), determine a plurality of diagonal crack for needing to measure, the transmitting terminal of ultrasonic detector (T) is then placed on concrete structure
The side for a plurality of diagonal crack that surface needs to measure, is placed on concrete structural surface for the receiving end (R) of ultrasonic detector
It is oblique successively to record transmitting terminal (T), first diagonal crack, Article 2 in order for the other side for a plurality of diagonal crack for needing to measure
Crack ... nth diagonal crack and receiving end (R) the distance between successively, are denoted as a respectively11, a2, a3..., an, a10；
It is at this time original state；N is the natural number more than or equal to 2；
C), start ultrasonic detector, record original state when sound when；
D), straight in same in position and the initial position of the transmitting terminal (T) and receiving end (R) that keep ultrasonic detector
Under the premise of on line, mobile 2n transmitting terminal (T) and receiving end (R) are recorded when moving each time, transmitting terminal (T) and first
The distance a of diagonal cracki1, the last one diagonal crack and receiving end (R) distance ai0And measure sound when ti, wherein i, which is represented, to be moved
Dynamic number, initial stage are the 1st time；Since the distance between each diagonal crack is constant, i.e. a2, a3..., anFor constant；If needing
It wants multiple measurement results to be verified, moves 2n+1 times, can be obtained 2n measurement result, can be used for Comparative result or test
Card；
E), by the distance between each diagonal crack a2, a3..., an, each time it is mobile when ai1And ai0Value and each time it is mobile when
T when soundi, substitute into and contain each diagonal crack angle, θnWith depth lnIn the 2n member equation group of unknown quantity, each diagonal crack angle can be acquired
Spend θnWith depth ln；Wherein, θnRefer to that nth diagonal crack rotates clockwise past transmitting around concrete structural surface cracking point
Hold angle experienced, lnRefer to the depth of nth diagonal crack.
2. the method for a kind of continuous a plurality of diagonal crack of detection concrete structure according to claim 1, it is characterized in that: described
2n member equation group establishment process it is as follows:
A), the transmitting terminal of ultrasonic detector and the linear distance on first diagonal crack vertex are calculated, if distance is Ai1, then distance
B), the receiving end of ultrasonic detector and the linear distance on the last item diagonal crack vertex are calculated, if distance is Ai0, then away from
From
C), the linear distance between the (n-1)th crack vertex and nth crack vertex is calculated, if linear distance is An, then distance
D), 2n member equation group is established are as follows:
E), special case works as n=1 when only single diagonal crack, need to only move the transmitting terminal and receiving terminal two of ultrasonic detector
It is secondary, when recording each sound t and it is mobile every time when ai1And ai0, the angle and depth of the diagonal crack can be calculated；At this time
2 yuan of equations are as follows:
3. a kind of method of the continuous a plurality of diagonal crack of detection concrete structure according to claim 1, feature
It is: the realization condition of the method are as follows:
1), the crack in concrete structure is extended in one direction, and angle is single；
2), in concrete structure diagonal crack depth be much larger than diagonal crack width.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115290409A (en) * | 2022-08-03 | 2022-11-04 | 燕山大学 | Method for inducing and quantitatively characterizing cracks of reinforced concrete test piece |
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