CN101710101A - Ultrasonic testing method for steel pipe void - Google Patents
Ultrasonic testing method for steel pipe void Download PDFInfo
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- CN101710101A CN101710101A CN200910183514A CN200910183514A CN101710101A CN 101710101 A CN101710101 A CN 101710101A CN 200910183514 A CN200910183514 A CN 200910183514A CN 200910183514 A CN200910183514 A CN 200910183514A CN 101710101 A CN101710101 A CN 101710101A
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Abstract
The invention relates to an ultrasonic testing method for steel pipe void, which comprises the following steps of: confirming a tested fracture surface of each steel pipe and arranging a plurality of survey lines on the surface of each steel pipe in a uniform distribution way; knocking each survey line on each fracture surface of arch ribs by a small hammer, preliminarily judging the compaction rate of concretes inside the steel pipe according to the knock, and recording judging results; measuring diameters of the survey lines on each fracture surface by using a tooling scale and recording; coating a coupling agent on the surface of each steel pipe, detecting each survey line by using an ultrasonic detector, and recording parameters of sound time, sound velocity, amplitude and wave form which are displayed in the detector; analyzing and calculating the recorded multi-group data to obtain the uniformity state of the concretes inside the steel pipes; if the uniformity state is favorable, then carrying out a quantitative calculation on inner pipe defects, and working out an inner pipe defect value of each fracture surface through a sound time value detected by the ultrasonic detector; and if the uniformity state is unfavorable, then obtaining a detection conclusion.
Description
Technical field
The invention belongs to the bridge structure field, a kind of ultrasonic testing method for steel pipe void that is specifically related to.
Background technology
The density of CFST Arch Bridge steel pipe inner concrete directly affects the anti-pressure ability of steel tube arch, because the construction technology of concrete filled steel tube, pipe inner concrete after building then is hidden, whether naked eyes can't Direct observation, for existing cavity defect all can not reflect intuitively between concrete and the steel pipe walls.With regard to present nondestructiving detecting means, relatively more commonly used is that hand hammer knocks and ultrasonic method, whether ultrasound examination comes to nothing to concrete and steel pipe inwall exactly, the detection whether inside concrete exists the density quality of space and steel pipe inner concrete to be carried out, existing ultrasonic method, because related specifications and rules are still far from perfect, do not have concrete workflow instructing the carrying out of concrete detection, thereby can make and detect that to be subjected to artificial factor bigger.
Therefore, studying a kind of simple and effective and practical ultrasonic testing method for steel pipe void is the present task of top priority.
Summary of the invention
Content of the present invention is to overcome the defective of prior art, and a kind of simple and effective ultrasonic testing method for steel pipe void is provided.
The technical scheme that realizes the object of the invention is: ultrasonic testing method for steel pipe void may further comprise the steps:
Step 3 is measured the diameter of each section survey line and record with tool ruler;
Step 4 is smeared couplant in steel tube surface, each survey line is carried out surveying with supersonic reflectoscope, and during the sound that shows in the register instrument, the velocity of sound, amplitude, frequency and waveform parameter;
The multi-group data of step 5 pair last step record carries out analytical calculation, draws the even situation of concrete in the pipe;
If step 6 steel pipe inner concrete good uniformity, the quantitative Analysis of defective in then managing by the sound duration that supersonic reflectoscope is measured, calculates the interior defective value of pipe of each section; If steel pipe inner concrete homogeneity is bad, then reach a conclusion, finish detection.
In the described step 5, the determination methods of the even situation of concrete is as follows:
In the data of described step 3 record, select in the above-mentioned steps 2 that t carries out statistical study when knocking the sound that tentatively is judged as closely knit position in the steel pipe, remove singular point, draw average t, regard as the time value of ultrasound wave by the zero defect concrete filled steel tube;
T maximal value, t minimum value and average t with record in the step 3 compares respectively, draws Δ t
1With Δ t
2,, calculate the maximal value h of the steel pipe void defective error that causes owing to concrete homogeneity according to the computing formula h ≈ Δ tVa of defective
1With minimum value h
2, draw Δ h=h
1-h
2In the formula, h is the steel pipe void defective value, and Va is the aerial velocity of sound of ultrasound wave, and Δ t is the mistiming of ultrasonic velocity by zero defect and defectiveness concrete filled steel tube;
Regulation maximal value defective permissible value only has 3mm on the engineering, if the defective that causes owing to concrete homogeneous problem fluctuation error delta h＞3mm judges that then concrete uniformity is very poor; Otherwise, judge that concrete uniformity is better.
Steel pipe void defective value account form in the described step 6 is identical with the computing method in the step 5.
Beneficial effect of the present invention is, be used for the conventional way that steel pipe void detects with respect to existing ultrasonic method, the present invention gathers correlation parameter by Ultrasound Instrument, carry out simple analysis after the detection, with the condition precedent of concrete uniformity as the ultrasonic method detection by quantitative, by ultrasonic when sound to recording out, velocity of sound parameter, computational analysis, draw the homogeneity quality of steel pipe inner concrete, thereby judge that directly this bridge utilizes ultrasonic method detection by quantitative steel pipe void whether feasible, avoid because steel pipe inner concrete homogeneity is poor excessively, ultrasonic method can not play comes to nothing in the detection by quantitative steel pipe and still in a large amount of useless work that continues, thereby saves manpower for detecting, material resources.
Description of drawings
Fig. 1 is the process flow diagram of the embodiment of the invention 1
Fig. 2 is the survey line distribution plan of the embodiment of the invention 1
Embodiment
Be described further below in conjunction with drawings and Examples.
As shown in Figure 1, ultrasonic testing method for steel pipe void may further comprise the steps:
Step 3 is measured the diameter of each section survey line and record with tool ruler;
Step 4 is smeared couplant in steel tube surface, each survey line is carried out surveying with supersonic reflectoscope, and during the sound that shows in the register instrument, the velocity of sound, amplitude, frequency and waveform parameter;
The multi-group data of step 5 pair last step record carries out analytical calculation, draws the even situation of concrete in the pipe.Concrete determination methods is as follows: in the data of described step 3 record, select in the above-mentioned steps 2 that t carries out statistical study when knocking the sound that tentatively is judged as closely knit position in the steel pipe, remove singular point, draw average t, as the time value of ultrasonic velocity by the zero defect concrete filled steel tube;
T maximal value, t minimum value and average t with record in the step 3 compares respectively, draws Δ t
1With Δ t
2,, calculate the maximum cavity defect value of steel pipe h according to the computing formula h ≈ Δ tVa of defective
1With minimum h
2, draw Δ h=h
1-h
2In the formula, h is the steel pipe void defective value, and Va is the aerial velocity of sound of ultrasound wave, and Δ t is the mistiming of ultrasonic velocity by zero defect and defectiveness concrete filled steel tube;
Regulation maximal value defective permissible value only has 3mm on the engineering, if the defective that causes owing to concrete homogeneous problem fluctuation error delta h＞3mm judges that then concrete uniformity is very poor; Otherwise, judge that concrete uniformity is better.
If step 6 steel pipe inner concrete good uniformity, the quantitative Analysis of defective in then managing by the sound duration that supersonic reflectoscope is measured, calculates the interior defective value of pipe of each section; If steel pipe inner concrete homogeneity is bad, then reach a conclusion, finish detection.
The computing formula of defective: h ≈ Δ tVa, in the formula, h is the steel pipe void defective value, and Va is the aerial velocity of sound of ultrasound wave, and Δ t is the mistiming of ultrasonic velocity by zero defect and defectiveness concrete filled steel tube.
Claims (3)
1. ultrasonic testing method for steel pipe void is characterized in that, this method may further comprise the steps:
Step 1 is determined the detection section of every steel pipe, in steel tube surface some surveys line is set, and every survey line is distributed in the two ends of steel pipe cross section diameter, and each survey line evenly distributes in steel tube surface;
Step 2 is knocked each survey line of each section of arch rib with hand hammer, according to knock the concrete compaction degree in the steel pipe is tentatively located to declare, and writes down and sentence the result, declares defective place as the emphasis detected object to locating;
Step 3 is measured the diameter of each section survey line and record with tool ruler;
Step 4 is smeared couplant in steel tube surface, each survey line is carried out surveying with supersonic reflectoscope, and during the sound that shows in the register instrument, the velocity of sound, amplitude, frequency and waveform parameter;
The multi-group data of step 5 pair last step record carries out analytical calculation, draws the even situation of concrete in the pipe;
If step 6 steel pipe inner concrete good uniformity, the quantitative Analysis of defective in then managing by the sound duration that supersonic reflectoscope is measured, calculates the interior defective value of pipe of each section; If steel pipe inner concrete homogeneity is bad, then reach a conclusion, finish detection.
2. supersonic detection method according to claim 1 is characterized in that, in the described step 5, the determination methods of the even situation of concrete is as follows:
In the data of described step 3 record, select in the above-mentioned steps 2 that t carries out statistical study when knocking the sound that tentatively is judged as closely knit position in the steel pipe, remove singular point, draw average t, regard as the time value of ultrasound wave by the zero defect concrete filled steel tube;
T maximal value, t minimum value and average t with record in the step 3 compares respectively, draws Δ t
1With Δ t
2,, calculate the maximal value h of the steel pipe void defective error that causes owing to concrete homogeneity according to the computing formula h ≈ Δ tVa of defective
1With minimum value h
2, draw Δ h=h
1-h
2In the formula, h is the steel pipe void defective value, and Va is the aerial velocity of sound of ultrasound wave, and Δ t is the mistiming of ultrasonic velocity by zero defect and defectiveness concrete filled steel tube;
If the defective fluctuation error delta h＞3mm owing to concrete homogeneous problem causes judges that then concrete uniformity is very poor; Otherwise, judge that concrete uniformity is better.
3. supersonic detection method according to claim 1 is characterized in that, steel pipe void defective value account form in the described step 6 and the computing method in the step 5 are: according to the computing formula h ≈ Δ tVa of defective, calculate the steel pipe void defective value; In the formula, h is the steel pipe void defective value, and Va is the aerial velocity of sound of ultrasound wave, and Δ t is the mistiming of ultrasound wave by zero defect and defectiveness concrete filled steel tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183514A CN101710101A (en) | 2009-09-23 | 2009-09-23 | Ultrasonic testing method for steel pipe void |
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| CN200910183514A CN101710101A (en) | 2009-09-23 | 2009-09-23 | Ultrasonic testing method for steel pipe void |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650617A (en) * | 2012-05-16 | 2012-08-29 | 长江勘测规划设计研究有限责任公司 | Sound wave penetrating through moving unit body detecting method for structural concrete |
| CN105424810A (en) * | 2015-11-11 | 2016-03-23 | 南昌航空大学 | Evaluation method for uniformity of fiber reinforcement ceramic matrix composite |
| CN106053597A (en) * | 2016-05-20 | 2016-10-26 | 湖南科技大学 | Detection method of steel pipe concrete cavity defect extracted on basis of HHT characteristics |
| CN106124632A (en) * | 2016-07-22 | 2016-11-16 | 山东大学 | A kind of concrete density appraisal procedure based on ultrasound wave |
| CN107014901A (en) * | 2017-03-31 | 2017-08-04 | 东北大学 | The device that a kind of use ultrasound examination round steel pipe cooperates with concrete |
| CN109459494A (en) * | 2018-11-22 | 2019-03-12 | 中建四局第六建筑工程有限公司 | A kind of detection method and device for steel pipe inner prop high grade rock sand concrete |
| CN110487827A (en) * | 2019-09-06 | 2019-11-22 | 广西大学 | A kind of detection device and detection method that Long-Span Concrete Filled Steel Tubular Arch Bridges unsticking is come to nothing |
| CN111398429A (en) * | 2020-04-03 | 2020-07-10 | 广西大学 | Method for calculating concrete filled steel tube top void height and area |
| CN111475944A (en) * | 2020-04-03 | 2020-07-31 | 广西大学 | Quantitative analysis method for concrete filled steel tube top void area |
| CN112986385A (en) * | 2021-03-02 | 2021-06-18 | 中国水利水电科学研究院 | Steel shell concrete void detection method by coupling impact mass energy method and neutron method |
| CN113686963A (en) * | 2021-08-31 | 2021-11-23 | 山西二建集团有限公司 | Method for detecting compactness of self-compacting steel pipe concrete special-shaped column |
| CN114324605A (en) * | 2021-12-23 | 2022-04-12 | 陕西省建筑科学研究院有限公司 | Device and method for detecting compactness of steel pipe concrete |
-
2009
- 2009-09-23 CN CN200910183514A patent/CN101710101A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650617A (en) * | 2012-05-16 | 2012-08-29 | 长江勘测规划设计研究有限责任公司 | Sound wave penetrating through moving unit body detecting method for structural concrete |
| CN102650617B (en) * | 2012-05-16 | 2014-03-05 | 长江勘测规划设计研究有限责任公司 | Sound wave penetrating through moving unit body detecting method for structural concrete |
| CN105424810A (en) * | 2015-11-11 | 2016-03-23 | 南昌航空大学 | Evaluation method for uniformity of fiber reinforcement ceramic matrix composite |
| CN106053597A (en) * | 2016-05-20 | 2016-10-26 | 湖南科技大学 | Detection method of steel pipe concrete cavity defect extracted on basis of HHT characteristics |
| CN106124632A (en) * | 2016-07-22 | 2016-11-16 | 山东大学 | A kind of concrete density appraisal procedure based on ultrasound wave |
| CN106124632B (en) * | 2016-07-22 | 2018-05-15 | 山东大学 | A kind of concrete density appraisal procedure based on ultrasonic wave |
| CN107014901A (en) * | 2017-03-31 | 2017-08-04 | 东北大学 | The device that a kind of use ultrasound examination round steel pipe cooperates with concrete |
| CN109459494A (en) * | 2018-11-22 | 2019-03-12 | 中建四局第六建筑工程有限公司 | A kind of detection method and device for steel pipe inner prop high grade rock sand concrete |
| CN110487827A (en) * | 2019-09-06 | 2019-11-22 | 广西大学 | A kind of detection device and detection method that Long-Span Concrete Filled Steel Tubular Arch Bridges unsticking is come to nothing |
| CN111398429A (en) * | 2020-04-03 | 2020-07-10 | 广西大学 | Method for calculating concrete filled steel tube top void height and area |
| CN111475944A (en) * | 2020-04-03 | 2020-07-31 | 广西大学 | Quantitative analysis method for concrete filled steel tube top void area |
| CN111398429B (en) * | 2020-04-03 | 2022-12-06 | 广西大学 | Method for calculating concrete filled steel tube top void height and area |
| CN111475944B (en) * | 2020-04-03 | 2023-03-28 | 广西大学 | Quantitative analysis method for concrete filled steel tube top void area |
| CN112986385A (en) * | 2021-03-02 | 2021-06-18 | 中国水利水电科学研究院 | Steel shell concrete void detection method by coupling impact mass energy method and neutron method |
| CN113686963A (en) * | 2021-08-31 | 2021-11-23 | 山西二建集团有限公司 | Method for detecting compactness of self-compacting steel pipe concrete special-shaped column |
| CN113686963B (en) * | 2021-08-31 | 2023-10-20 | 山西二建集团有限公司 | Method for detecting compactness of self-compacting concrete filled steel tube special-shaped column |
| CN114324605A (en) * | 2021-12-23 | 2022-04-12 | 陕西省建筑科学研究院有限公司 | Device and method for detecting compactness of steel pipe concrete |
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Open date: 20100519 |