CN112834401A - Method for rapidly predicting sidewall leakage of underground continuous wall based on infrared technology - Google Patents
Method for rapidly predicting sidewall leakage of underground continuous wall based on infrared technology Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005516 engineering process Methods 0.000 title claims abstract description 29
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000001931 thermography Methods 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims description 15
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- 241001085205 Prenanthella exigua Species 0.000 claims description 4
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- 230000008595 infiltration Effects 0.000 description 1
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Abstract
The invention discloses a method for rapidly predicting the leakage of a side wall of an underground continuous wall based on an infrared technology, which belongs to the technical field of construction safety detection and comprises the following steps: s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range; s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning; s3, determining a side wall leakage source of the underground diaphragm wall; s4, constructing a judgment model of the underground continuous wall side wall leakage and the infrared thermal field image; s5 determining the cause of the leakage and the water seepage area of the side wall of the underground diaphragm wall. According to the method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology, the infrared thermal imager is arranged, infrared rays are used for carrying out large-area detection on the underground continuous wall side wall in a non-contact mode, the detection result can be directly seen in an image mode, a thermograph can be recorded and displayed in a direct visual mode, and the detection result can be analyzed in a high-precision mode through analyzing the thermograph.
Description
Technical Field
The invention belongs to the technical field of construction safety detection, and particularly relates to a method for rapidly predicting the side wall leakage of an underground continuous wall based on an infrared technology.
Background
The underground continuous wall can be used as an enclosing structure for retaining soil and stopping water in a foundation excavation stage, can also be used as an outer wall of a basement structure, and is one of effective means for deep foundation support. Due to a plurality of uncertain factors existing in the construction process and the construction process, if the side wall of the underground continuous wall leaks water, the normal construction of the foundation pit is influenced, and the risk is increased.
In the prior art, when the side wall side leakage detection is carried out on the underground diaphragm wall, the current domestic detection methods mainly comprise drilling coring, sound wave transmission methods and the like. The core drilling method needs to drill holes on the underground continuous wall body, extract concrete core samples and judge whether the underground continuous wall has the defects of leakage and the like by observing the apparent characteristics of the concrete core samples. According to the sound wave transmission principle, before concrete pouring of the ground wall, relevant measuring pipes are embedded in weak structural positions, which are likely to leak, of the ground wall, after the concrete pouring, a sound energy emitter and a sound energy receiver are respectively arranged in the two sound measuring pipes, and whether the ground wall has the defect of leakage or not is judged according to the measured sound wave speed and amplitude. The two methods can not detect the whole underground diaphragm wall, wherein the drilling coring belongs to a destructive detection method, the wall body structure is damaged, and the large-area detection is impossible: the acoustic transmission method needs to embed the measuring pipe in advance, which can increase the construction cost and influence the construction period.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for rapidly predicting the leakage of the side wall of the underground continuous wall based on an infrared technology, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology comprises the following steps:
s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range;
s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning;
s3, performing infrared thermal imaging detection on the wall body side wall corresponding to the suspicious part, and determining the underground continuous wall side wall leakage source;
s4, establishing a geometric relationship between the side wall leakage of the underground continuous wall and the infrared thermal imaging technical image, and establishing a judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image;
and S5, analyzing by using the judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image, and determining the reason of the side wall leakage of the underground continuous wall and the water seepage area.
Further optimizing the technical scheme, in the step S1, the cause of the leakage of the side wall of the underground continuous wall and the water seepage area of the side wall of the underground continuous wall are determined by using the temperature distribution of the thermal field image of the thermal infrared imager, and the cause and the water seepage area are used for predicting the problem of the leakage of the side wall of the underground continuous wall.
The technical scheme is further optimized, the thermal infrared imager utilizes an infrared detector and an optical imaging objective lens to receive the infrared radiation energy distribution pattern of the detected target and reflects the infrared radiation energy distribution pattern on a photosensitive element of the infrared detector so as to obtain a thermal field image, the thermal field image corresponds to the thermal distribution field on the surface of the object, different colors on the thermal field image represent different temperatures of the detected object, warm colors and cold colors are used for representing the temperature, or bright white is used for representing the temperature, and dark black is used for representing the temperature.
Further optimize this technical scheme, the reason of underground continuous wall lateral wall seepage includes the wet stain of underground continuous wall lateral wall, the infiltration capacity of underground continuous wall lateral wall, the water clock of underground continuous wall lateral wall and the silt of carrying of underground continuous wall lateral wall.
Further optimizing the technical solution, in S3, if there are multiple leakage sources coexisting, each suspected leakage source may be detected by an elimination method, and the leakage source is accurately detected through comparative analysis.
Further optimizing the technical scheme, in the step S5, a suspected leakage position is found, instrument color difference is further adjusted, the suspected position is more obvious, and the leakage position is finally determined.
Further optimizing the technical scheme, in S5, the infrared grayscale image collected by the infrared thermal imaging technology is subjected to gaussian filtering to form a noise reduction map, the binary image after thresholding is subjected to edge processing to form a low-temperature region extraction map, and the determination model is used to analyze the reason for the sidewall leakage of the underground diaphragm wall and calculate the area of the water seepage region.
Further optimizing the technical scheme, in the step S5, since the heat capacity of water is larger than that of the building material, under the same heat radiation condition, the heat capacity of the leaking part is increased due to the presence of water, and the temperature rise of the leaking part is small, so that a "cold spot" is formed on the infrared thermal field image and is used for effectively detecting the leakage source.
Compared with the prior art, the invention provides a method for rapidly predicting the leakage of the side wall of the underground continuous wall based on the infrared technology, which has the following beneficial effects:
this method of underground continuous wall lateral wall seepage of fast prediction based on infrared technology, through setting up thermal infrared imager, the infrared ray carries out large tracts of land detection to underground continuous wall lateral wall through non-contact ground, and can directly see the testing result with the form of image, the usable direct visual mode of thermal image is recorded, is shown, high accuracy analysis can be carried out through analytic thermal image to the testing result, accomplish the detection task of large tracts of land in short time, high work efficiency, save the cost, only need a small amount of staff just to accomplish.
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Fig. 1 is a schematic flow chart of a method for rapidly predicting the sidewall leakage of an underground diaphragm wall based on infrared technology according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology comprises the following steps:
s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range;
s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning;
s3, performing infrared thermal imaging detection on the wall body side wall corresponding to the suspicious part, and determining the underground continuous wall side wall leakage source;
s4, establishing a geometric relationship between the side wall leakage of the underground continuous wall and the infrared thermal imaging technical image, and establishing a judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image;
and S5, analyzing by using the judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image, and determining the reason of the side wall leakage of the underground continuous wall and the water seepage area.
Specifically, in S1, the cause of the sidewall leakage of the underground continuous wall and the water seepage area of the sidewall of the underground continuous wall are determined by using the temperature distribution of the thermal field image of the thermal infrared imager, so as to predict the problem of the sidewall leakage of the underground continuous wall.
Specifically, the thermal infrared imager uses an infrared detector and an optical imaging objective to receive an infrared radiation energy distribution pattern of a detected target and reflects the infrared radiation energy distribution pattern onto a photosensitive element of the infrared detector, so as to obtain a thermal field image, the thermal field image corresponds to a thermal distribution field on the surface of an object, different colors on the thermal field image represent different temperatures of the detected object, warm colors and cold colors represent the temperature, or bright white represents the temperature, and dark black represents the temperature.
Specifically, the reasons for the leakage of the side wall of the underground continuous wall include wet stain on the side wall of the underground continuous wall, the water seepage amount of the side wall of the underground continuous wall, water leakage of the side wall of the underground continuous wall and sand carried by the side wall of the underground continuous wall.
Specifically, in S3, if multiple leakage sources coexist, each suspected leakage source may be detected by an elimination method, and the leakage source is accurately detected through comparative analysis.
Specifically, in S5, a suspected leaking area is found, instrument color difference is further adjusted to make the suspected leaking area more obvious, and the leaking area is finally determined.
Specifically, in S5, the infrared grayscale image acquired by the infrared thermal imaging technique is subjected to gaussian filtering to form a noise reduction map, the binary image after thresholding is subjected to edge processing to form a low-temperature region extraction map, and the determination model analyzes the cause of the sidewall leakage of the underground diaphragm wall and calculates the area of the water seepage region.
Specifically, in S5, since the heat capacity of water is greater than that of the building material, under the same heat radiation condition, the heat capacity of the leakage part is increased due to the presence of water, and the temperature rise is small, so that a "cold spot" is formed on the infrared thermal field image for effective detection of the leakage source.
Example two:
a method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology comprises the following steps:
s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range;
s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning;
s3, performing infrared thermal imaging detection on the wall body side wall corresponding to the suspicious part, and determining the underground continuous wall side wall leakage source;
s4, establishing a geometric relationship between the side wall leakage of the underground continuous wall and the infrared thermal imaging technical image, and establishing a judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image;
and S5, analyzing by using the judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image, and determining the reason of the side wall leakage of the underground continuous wall and the water seepage area.
Specifically, in S1, the cause of the sidewall leakage of the underground continuous wall and the water seepage area of the sidewall of the underground continuous wall are determined by using the temperature distribution of the thermal field image of the thermal infrared imager, so as to predict the problem of the sidewall leakage of the underground continuous wall.
Specifically, the thermal infrared imager uses an infrared detector and an optical imaging objective to receive an infrared radiation energy distribution pattern of a detected target and reflects the infrared radiation energy distribution pattern onto a photosensitive element of the infrared detector, so as to obtain a thermal field image, the thermal field image corresponds to a thermal distribution field on the surface of an object, different colors on the thermal field image represent different temperatures of the detected object, and warm colors and cold colors represent the temperature.
Specifically, the reasons for the leakage of the side wall of the underground continuous wall include wet stain on the side wall of the underground continuous wall, the water seepage amount of the side wall of the underground continuous wall, water leakage of the side wall of the underground continuous wall and sand carried by the side wall of the underground continuous wall.
Specifically, in S3, if multiple leakage sources coexist, each suspected leakage source may be detected by an elimination method, and the leakage source is accurately detected through comparative analysis.
Specifically, in S5, a suspected leaking area is found, instrument color difference is further adjusted to make the suspected leaking area more obvious, and the leaking area is finally determined.
Specifically, in S5, the infrared grayscale image acquired by the infrared thermal imaging technique is subjected to gaussian filtering to form a noise reduction map, the binary image after thresholding is subjected to edge processing to form a low-temperature region extraction map, and the determination model analyzes the cause of the sidewall leakage of the underground diaphragm wall and calculates the area of the water seepage region.
Specifically, in S5, since the heat capacity of water is greater than that of the building material, under the same heat radiation condition, the heat capacity of the leakage part is increased due to the presence of water, and the temperature rise is small, so that a "cold spot" is formed on the infrared thermal field image for effective detection of the leakage source.
Example three:
a method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology comprises the following steps:
s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range;
s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning;
s3, performing infrared thermal imaging detection on the wall body side wall corresponding to the suspicious part, and determining the underground continuous wall side wall leakage source;
s4, establishing a geometric relationship between the side wall leakage of the underground continuous wall and the infrared thermal imaging technical image, and establishing a judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image;
and S5, analyzing by using the judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image, and determining the reason of the side wall leakage of the underground continuous wall and the water seepage area.
Specifically, in S1, the cause of the sidewall leakage of the underground continuous wall and the water seepage area of the sidewall of the underground continuous wall are determined by using the temperature distribution of the thermal field image of the thermal infrared imager, so as to predict the problem of the sidewall leakage of the underground continuous wall.
Specifically, the thermal infrared imager uses an infrared detector and an optical imaging objective to receive an infrared radiation energy distribution pattern of a detected target and reflects the infrared radiation energy distribution pattern onto a photosensitive element of the infrared detector, so as to obtain a thermal field image, the thermal field image corresponds to a thermal distribution field on the surface of an object, different colors on the thermal field image represent different temperatures of the detected object, the temperature is represented by bright white, and the temperature is represented by dark black.
Specifically, the reasons for the leakage of the side wall of the underground continuous wall include wet stain on the side wall of the underground continuous wall, the water seepage amount of the side wall of the underground continuous wall, water leakage of the side wall of the underground continuous wall and sand carried by the side wall of the underground continuous wall.
Specifically, in S3, if multiple leakage sources coexist, each suspected leakage source may be detected by an elimination method, and the leakage source is accurately detected through comparative analysis.
Specifically, in S5, a suspected leaking area is found, instrument color difference is further adjusted to make the suspected leaking area more obvious, and the leaking area is finally determined.
Specifically, in S5, the infrared grayscale image acquired by the infrared thermal imaging technique is subjected to gaussian filtering to form a noise reduction map, the binary image after thresholding is subjected to edge processing to form a low-temperature region extraction map, and the determination model analyzes the cause of the sidewall leakage of the underground diaphragm wall and calculates the area of the water seepage region.
Specifically, in S5, since the heat capacity of water is greater than that of the building material, under the same heat radiation condition, the heat capacity of the leakage part is increased due to the presence of water, and the temperature rise is small, so that a "cold spot" is formed on the infrared thermal field image for effective detection of the leakage source.
The invention has the beneficial effects that: this method based on infrared technology's underground continuous wall lateral wall seepage of fast prediction, through setting up thermal infrared imager, the infrared ray carries out large tracts of land detection to underground continuous wall lateral wall through non-contact ground to can directly see the testing result with the form of image, the usable direct visual mode of thermal image is recorded, is shown, high accuracy analysis can be carried out through analytic thermal image to the testing result, accomplish the detection task of large tracts of land in short time, high work efficiency, only need a small amount of staff just to accomplish.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for rapidly predicting the leakage of the underground continuous wall side wall based on the infrared technology is characterized by comprising the following steps:
s1, utilizing a thermal infrared imager to scan the side wall of the underground continuous wall in a large range;
s2, determining suspicious parts by adopting an infrared thermal imaging technology through large-range scanning;
s3, performing infrared thermal imaging detection on the wall body side wall corresponding to the suspicious part, and determining the underground continuous wall side wall leakage source;
s4, establishing a geometric relationship between the side wall leakage of the underground continuous wall and the infrared thermal imaging technical image, and establishing a judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image;
and S5, analyzing by using the judgment model of the side wall leakage of the underground continuous wall and the infrared thermal field image, and determining the reason of the side wall leakage of the underground continuous wall and the water seepage area.
2. The method for rapidly predicting the sidewall leakage of the underground continuous wall based on the infrared technology as claimed in claim 1, wherein in the step S1, the cause of the sidewall leakage of the underground continuous wall and the water seepage area of the sidewall of the underground continuous wall are determined by using the temperature distribution of the thermal field image of the thermal infrared imager, so as to predict the problem of the sidewall leakage of the underground continuous wall.
3. The method for rapidly predicting the sidewall leakage of the underground diaphragm wall based on the infrared technology as claimed in claim 2, wherein the thermal infrared imager uses an infrared detector and an optical imaging objective to receive the infrared radiation energy distribution pattern of the measured object and reflect the infrared radiation energy distribution pattern on a photosensitive element of the infrared detector, so as to obtain a thermal field image, the thermal field image corresponds to the thermal distribution field of the surface of the object, different colors on the thermal field image represent different temperatures of the measured object, and warm colors and cold colors represent temperature high, or bright white represents temperature high, and dark black represents temperature low.
4. The method of claim 2, wherein the causes of the underground diaphragm wall side wall leakage include wet soil of the underground diaphragm wall side wall, water seepage of the underground diaphragm wall side wall, water dripping of the underground diaphragm wall side wall, and sand entrainment of the underground diaphragm wall side wall.
5. The method for rapidly predicting the sidewall leakage of the underground diaphragm wall based on the infrared technology as claimed in claim 1, wherein in S3, if there are multiple leakage sources coexisting, each suspected leakage source is detected by an exclusion method, and the leakage source is accurately detected by a comparative analysis.
6. The infrared-technology-based method for rapidly predicting the sidewall leakage of the underground continuous wall according to claim 1, wherein in step S5, a suspected leakage position is found, instrument color difference is further adjusted to make the suspected leakage position more obvious, and the leakage position is finally determined.
7. The method for rapidly predicting the sidewall leakage of the underground diaphragm wall based on the infrared technology as claimed in claim 1, wherein in S5, the infrared gray scale image collected by the infrared thermal imaging technology is gaussian-filtered to form a noise reduction map, the binary map after thresholding is subjected to edge processing to form a low-temperature region extraction map, and the determination model is used to analyze the cause of the sidewall leakage of the underground diaphragm wall and calculate the area of the water seepage region.
8. The infrared-based method for rapidly predicting sidewall leakage of underground diaphragm wall in claim 1, wherein in S5, since the heat capacity of water is larger than that of building material, under the same thermal radiation condition, the leakage part has increased heat capacity due to the presence of water and its temperature is raised less, so as to form "cold spot" on the infrared thermal field image for effectively detecting the leakage source.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636313A (en) * | 2012-04-11 | 2012-08-15 | 浙江工业大学 | Leakage source detecting device based on infrared thermal imaging processing |
| CN102776904A (en) * | 2012-07-19 | 2012-11-14 | 同济大学 | Method for fast predicting side wall leakage of underground diaphragm wall using infrared thermal fields |
| CN103882891A (en) * | 2014-01-16 | 2014-06-25 | 同济大学 | Method for utilizing infrared thermal fields to quickly predict side wall leakage of underground continuous wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636313A (en) * | 2012-04-11 | 2012-08-15 | 浙江工业大学 | Leakage source detecting device based on infrared thermal imaging processing |
| CN102776904A (en) * | 2012-07-19 | 2012-11-14 | 同济大学 | Method for fast predicting side wall leakage of underground diaphragm wall using infrared thermal fields |
| CN103882891A (en) * | 2014-01-16 | 2014-06-25 | 同济大学 | Method for utilizing infrared thermal fields to quickly predict side wall leakage of underground continuous wall |
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