CN102589418A - Method for detecting positions of concrete crack and reinforcing steel bar of reinforced concrete member - Google Patents
Method for detecting positions of concrete crack and reinforcing steel bar of reinforced concrete member Download PDFInfo
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- CN102589418A CN102589418A CN2011100029487A CN201110002948A CN102589418A CN 102589418 A CN102589418 A CN 102589418A CN 2011100029487 A CN2011100029487 A CN 2011100029487A CN 201110002948 A CN201110002948 A CN 201110002948A CN 102589418 A CN102589418 A CN 102589418A
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- reinforced concrete
- concrete member
- distress
- reinforcement location
- thermal imaging
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Abstract
The invention discloses a method for detecting the positions of a concrete crack and a reinforcing steel bar of a reinforced concrete member. The method provided by the invention for detecting positions of the concrete crack and the reinforcing steel bar of the reinforced concrete member is simple and safe to operate, not easy to be influenced and quick in detection speed. The method of the invention is realized through the flowing technical scheme: a thermal imager is used to pick up the images of the reinforced concrete member which needs to be detected at night; the reinforced steel bar in the reinforced concrete member is heated to certain temperature and then is cooled to the original temperature by itself; the entire process is shoot and recorded by the thermal imager; and the positions of the crack and the reinforced steel bar can be obtained by analyzing the images.
Description
Technical field
The present invention relates to a kind of method that detects concrete component.The present invention be more particularly directed to a kind of detection method of using thermal imaging.
Background technology
At present, known distress in concrete detection method is to use the magnifier naked-eye observation, and the detection of reinforcement location then is to beat with ultrasonic, radiowave learning after the bounce-back on the reinforcing bar.
The weak point that detects distress in concrete with the method for magnifier naked-eye observation has labor intensity of operating staff big, be near the surface of concrete component, and sometimes also can danger close (like the girder bottom surface of bridge).Measurement result is difficult for record, and the tendency in crack and width are all wanted manual record, and precision is low.Can't detect the degree of depth in crack, the inside tendency in crack is also not clear.
The weak point that detects reinforcement location with the method for ultrasonic, radiowave has easily by the interference measurement results of concrete own, can't confirm that the reinforcing bar that is detected is lengthways main steel bar or stirrup.
More than two kinds of detections instrument of specialty separately all, can not use a cover instrument detecting.
Summary of the invention
The present invention has overcome shortcoming of the prior art, and a kind of safety simple to operate is provided, and difficult quilt disturbs, the detection reinforced concrete member distress in concrete that measuring speed is fast and the method for reinforcement location.
In order to solve the problems of the technologies described above; The present invention realizes through following technical scheme: the reinforced concrete member shooting that with thermal imaging system needs is detected at night; Reinforcing bar in the heating reinforced concrete member stops after uniform temperature, lets it oneself cool to original temperature.Whole process is taken record with thermal imaging system.Image is analyzed the situation that just can obtain crack and reinforcement location.
Described thermal imaging system is preferably the thermal imaging system of high sensitivity, is preferably the night that temperature is lower than 15 degree described night, and described heating uniform temperature is preferably than about high 10 degree of temperature.The most handy reinforcing bar external wire energising of described heating reinforcing bar is heated or is made steel bars in concrete produce current flow heats with the variation magnetic field that coil produces.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
In the lower night of temperature such as the evening in winter, the thermal imaging system of high sensitivity is placed in takes the place that needs to detect the position.The method of steel bars in concrete generation current flow heats is heated to reinforcing bar than about high 10 degree of temperature slowly.Stop heating then, let its natural cooling.Take overall process with the thermal imaging system peace.Analyze the image of taking, the place that temperature is high is a reinforcing bar position, and it is the crack that temperature has sudden change and uneven place, and inhomogeneous degree with sudden change is the width and the degree of depth in crack.Analytic process can be done the thermal imaging figure comparative analysis then of standard element earlier.Can obtain the distress in concrete and the reinforcing bar position of reinforced concrete member through above-mentioned method.
Claims (5)
1. method that detects reinforced concrete member distress in concrete and reinforcement location; Method is described below: the reinforced concrete member shooting that with thermal imaging system needs is detected at night; Reinforcing bar in the heating reinforced concrete member stops after uniform temperature; Let it oneself cool to original temperature, whole process is taken record with thermal imaging system, the image of gained is analyzed the situation that just can obtain crack and reinforcement location.
2. the method for detection reinforced concrete member distress in concrete according to claim 1 and reinforcement location is characterized in that described thermal imaging system is preferably the thermal imaging system of high sensitivity.
3. the method for detection reinforced concrete member distress in concrete according to claim 1 and reinforcement location is characterized in that, be the night that temperature is lower than 15 degree described night.
4. the method for detection reinforced concrete member distress in concrete according to claim 1 and reinforcement location is characterized in that, described heating uniform temperature is than about high 10 degree of temperature.
5. the method for detection reinforced concrete member distress in concrete according to claim 1 and reinforcement location; It is characterized in that described heating reinforcing bar makes steel bars in concrete produce current flow heats with reinforcing bar external wire energising heating or with the variation magnetic field that coil produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100029487A CN102589418A (en) | 2011-01-08 | 2011-01-08 | Method for detecting positions of concrete crack and reinforcing steel bar of reinforced concrete member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100029487A CN102589418A (en) | 2011-01-08 | 2011-01-08 | Method for detecting positions of concrete crack and reinforcing steel bar of reinforced concrete member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102589418A true CN102589418A (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100029487A Pending CN102589418A (en) | 2011-01-08 | 2011-01-08 | Method for detecting positions of concrete crack and reinforcing steel bar of reinforced concrete member |
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| CN (1) | CN102589418A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743776A (en) * | 2014-01-02 | 2014-04-23 | 四川省建筑科学研究院 | In-concrete steel bar detection method based on induction heating and infrared thermography |
| CN104502352A (en) * | 2014-12-12 | 2015-04-08 | 中国建筑第八工程局有限公司 | Method for monitoring compactness of concrete filled steel tube |
| CN104677943A (en) * | 2015-03-12 | 2015-06-03 | 重庆交通大学 | Method for detecting corrosion degree of steel bars inside concrete based on infrared thermal imaging |
| CN110220783A (en) * | 2019-06-28 | 2019-09-10 | 北京工业大学 | A kind of apparatus and method of observation armored concrete drawing process internal fissure development |
| CN111765845A (en) * | 2020-05-22 | 2020-10-13 | 南京方园建设工程材料检测中心 | Method for detecting steel bar anchoring length of assembled concrete grouting sleeve based on infrared imaging principle |
| CN111780665A (en) * | 2020-07-17 | 2020-10-16 | 江苏远荣智能装备有限公司 | Method for positioning reinforcing mesh |
| CN112013783A (en) * | 2020-10-20 | 2020-12-01 | 湖南大学 | Bridge crack depth detection method, device and system |
| CN114413773A (en) * | 2020-10-28 | 2022-04-29 | 北京中富华仪科技有限公司 | Reinforcing bar scanner system with wide function is surveyed to crack |
-
2011
- 2011-01-08 CN CN2011100029487A patent/CN102589418A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743776A (en) * | 2014-01-02 | 2014-04-23 | 四川省建筑科学研究院 | In-concrete steel bar detection method based on induction heating and infrared thermography |
| CN104502352A (en) * | 2014-12-12 | 2015-04-08 | 中国建筑第八工程局有限公司 | Method for monitoring compactness of concrete filled steel tube |
| CN104677943A (en) * | 2015-03-12 | 2015-06-03 | 重庆交通大学 | Method for detecting corrosion degree of steel bars inside concrete based on infrared thermal imaging |
| CN104677943B (en) * | 2015-03-12 | 2017-05-17 | 重庆交通大学 | Method for detecting corrosion degree of steel bars inside concrete based on infrared thermal imaging |
| CN110220783A (en) * | 2019-06-28 | 2019-09-10 | 北京工业大学 | A kind of apparatus and method of observation armored concrete drawing process internal fissure development |
| CN111765845A (en) * | 2020-05-22 | 2020-10-13 | 南京方园建设工程材料检测中心 | Method for detecting steel bar anchoring length of assembled concrete grouting sleeve based on infrared imaging principle |
| CN111780665A (en) * | 2020-07-17 | 2020-10-16 | 江苏远荣智能装备有限公司 | Method for positioning reinforcing mesh |
| CN112013783A (en) * | 2020-10-20 | 2020-12-01 | 湖南大学 | Bridge crack depth detection method, device and system |
| CN114413773A (en) * | 2020-10-28 | 2022-04-29 | 北京中富华仪科技有限公司 | Reinforcing bar scanner system with wide function is surveyed to crack |
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Application publication date: 20120718 |