CN112767353A - Tunnel lining crack disease evaluation method and equipment - Google Patents
Tunnel lining crack disease evaluation method and equipment Download PDFInfo
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Abstract
The invention provides a tunnel lining crack disease evaluation method and equipment. The method comprises the following steps: acquiring an image of a tunnel lining crack, and superposing the image to obtain a tunnel lining crack distribution plane image; simplifying the cracks into approximate triangular prisms by combining the depth information of the cracks, and generating three-dimensional images of the tunnel lining crack triangular prisms by processing the image of the tunnel lining crack distribution plane images; obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and dividing the disease grade of the tunnel lining cracks according to the fractal dimension. The method can simply and conveniently evaluate the grade of the tunnel lining crack, does not depend on subjective assignment or expert experience in the evaluation process, and has objective and accurate evaluation results.
Description
Technical Field
The embodiment of the invention relates to the field of tunnel structure health diagnosis, in particular to a method and equipment for evaluating tunnel lining crack diseases.
Background
The tunnel can be influenced by various structural diseases in the operation stage, if the tunnel is not timely and effectively evaluated and measures are taken, economic loss can be caused, and serious diseases can be caused to the life and property safety of people. The cracks are one of the most common and serious defects of tunnel lining, and the tunnel lining cracks not only reduce the lining safety and destroy the stability of the tunnel, but also cause other defects such as water leakage and the like to influence the normal use of the tunnel. At present, two evaluation methods for tunnel lining crack diseases are mainly used, wherein one evaluation method is to carry out fuzzy comprehensive evaluation and health classification on a tunnel according to crack characteristic indexes and corresponding judgment standards; and the other method is to establish a tunnel mechanical model containing cracks and then carry out numerical simulation and stability analysis. The method I has wider engineering application, but depends on subjective assignment or expert experience and is greatly influenced by human factors; the method has higher requirements on two pairs of mechanical modeling and parameter acquisition, and is not beneficial to the practical operation and application of engineering. Therefore, the current related technology has certain limitations for the health diagnosis of the tunnel lining crack diseases. Therefore, the development of a method for evaluating a tunnel lining crack disease can effectively overcome the defects in the related technologies, and is an urgent technical problem to be solved in the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a tunnel lining crack disease evaluation method and equipment.
In a first aspect, an embodiment of the present invention provides a method for evaluating a tunnel lining crack disease, including: acquiring an image of a tunnel lining crack, and superposing the image to obtain a tunnel lining crack distribution plane image; processing the image of the tunnel lining crack distribution plane image to generate a tunnel lining crack triangular prism three-dimensional image; obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
On the basis of the content of the embodiment of the method, the method for evaluating the crack disease of the tunnel lining, provided by the embodiment of the invention, for obtaining the image of the crack of the tunnel lining comprises the following steps: dividing the tunnel lining containing the cracks into a plurality of sections, and carrying out block shooting on the section lining at the center of the pavement of each section to obtain a block image of the cracks of the tunnel lining of the section.
On the basis of the content of the embodiment of the method, the method for evaluating the crack damage of the tunnel lining, provided by the embodiment of the invention, for superposing the images to obtain a planar image of the crack distribution of the tunnel lining, comprises the following steps of: carrying out curvature modification on the block image to obtain a block image with the same radian as the tunnel lining; superposing the block images to obtain a tunnel lining crack image with radian; and carrying out UV decomposition on the tunnel lining crack image with the radian, and unfolding according to the arc surface angle of the tunnel lining to obtain a tunnel lining crack distribution plane image.
On the basis of the content of the embodiment of the method, the method for evaluating the tunnel lining crack diseases, which is provided by the embodiment of the invention, for obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory comprises the following steps of: covering the three-dimensional image of the tunnel lining crack triangular prism by using orthocubes with different side lengths, and recording the side lengths of the orthocubes and the corresponding number of the orthocubes covering the crack triangular prism in the three-dimensional image of the tunnel lining crack triangular prism; performing least square fitting on the logarithm of the side length and the logarithm of the number of the orthocubes; and obtaining the slope of the straight line after least square fitting, wherein the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism is the absolute value of the slope of the straight line.
On the basis of the content of the embodiment of the method, the method for evaluating the disease of the tunnel lining cracks, provided by the embodiment of the invention, comprises the following steps of dividing the disease grade of the tunnel lining cracks according to the fractal dimension: and calculating the fractal dimension and the health value of the crack diseases by using a box-in-box method and a fuzzy mathematical method respectively, and establishing grade division of the crack diseases based on the fractal dimension according to the corresponding relation between the fractal dimension and the health value to obtain the range of fractal dimension intervals corresponding to different disease grades.
On the basis of the content of the embodiment of the method, the method for evaluating the crack damage of the tunnel lining provided by the embodiment of the invention further comprises the following steps after the disease grade of the crack of the tunnel lining is divided: and acquiring the fractal dimension of the field tunnel lining crack in real time, and if the fractal dimension of the field tunnel lining crack falls into an interval range of the fractal dimension interval range, determining the disease grade of the field tunnel lining crack as one grade of the disease grades corresponding to the fractal dimension interval range.
In a second aspect, an embodiment of the present invention provides a tunnel lining crack damage evaluation device, including: the planar image module is used for acquiring images of the tunnel lining cracks, and superposing the images to obtain planar images of the distribution of the tunnel lining cracks; the crack three-dimensional image module is used for processing the tunnel lining crack distribution plane image to obtain a triangular prism three-dimensional image of the tunnel lining crack distribution; the fractal dimension module is used for obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and the disease grading module is used for dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
In a third aspect, an embodiment of the present invention provides an electronic device, including:
at least one processor; and at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, and the processor calls the program instructions to execute the method for evaluating the tunnel lining crack damage provided by any one of the various implementation manners of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause a computer to execute the method for evaluating a tunnel lining crack damage provided in any one of the various implementation manners of the first aspect.
According to the method and the device for evaluating the tunnel lining crack diseases, provided by the embodiment of the invention, the fractal dimension of the tunnel lining cracks is calculated by collecting and identifying the image of the tunnel lining cracks, a crack disease evaluation mechanism based on the fractal dimension is constructed according to the relation between the fractal dimension and the health value, the grade evaluation of the tunnel lining crack diseases can be carried out relatively simply and conveniently, the evaluation process does not depend on subjective assignment or expert experience, and the evaluation result is objective and accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below to the drawings required for the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a tunnel lining crack disease evaluation method provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a tunnel lining crack disease evaluation device provided by an embodiment of the invention;
fig. 3 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating an image acquisition principle of a tunnel lining crack according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a principle of obtaining a planar image of a distribution of cracks of a tunnel lining by superposition according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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. In addition, technical features of various embodiments or individual embodiments provided by the present invention may be arbitrarily combined with each other to form a feasible technical solution, and such combination is not limited by the sequence of steps and/or the structural composition mode, but must be realized by a person skilled in the art, and when the technical solution combination is contradictory or cannot be realized, such a technical solution combination should not be considered to exist and is not within the protection scope of the present invention.
The embodiment of the invention provides a tunnel lining crack disease evaluation method, and referring to fig. 1, the method comprises the following steps: acquiring an image of a tunnel lining crack, and superposing the image to obtain a tunnel lining crack distribution plane image; processing the image of the tunnel lining crack distribution plane image to generate a tunnel lining crack triangular prism three-dimensional image; obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
Based on the content of the above method embodiment, as an optional embodiment, the method for evaluating a tunnel lining crack disease provided in the embodiment of the present invention includes: dividing the tunnel lining containing the cracks into a plurality of sections, and carrying out block shooting on the section lining at the center of the pavement of each section to obtain a block image of the cracks of the tunnel lining of the section. Referring specifically to fig. 4, a section of the tunnel lining 1 containing the cracks is photographed in blocks, generally, four blocks are obtained, and marks are made at the blocks, as shown at point A, B, C in fig. 4. And then shooting each block of the tunnel wall at the center of the road surface in the tunnel by adopting a high-definition camera 2 on a supporting base 3.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for evaluating a tunnel lining crack defect provided in the embodiment of the present invention, where the image is superimposed to obtain a tunnel lining crack distribution plane image, includes: carrying out curvature modification on the block image to obtain a block image with the same radian as the tunnel lining; superposing the block images to obtain a tunnel lining crack image with radian; and carrying out UV decomposition on the tunnel lining crack image with the radian, and unfolding according to the arc surface angle of the tunnel lining to obtain a tunnel lining crack distribution plane image. Specifically, referring to fig. 5, 3Dmax is adopted to increase the number of blocks for each block image (for example, the first layer from top in fig. 5), add a curvature modifier, and properly adjust axial and angular parameters, so as to obtain four block images (for example, the second layer from top in fig. 5) with the same radian as the tunnel lining; superposing the four cambered block images according to the positions of the block marking points A, B, C, thereby obtaining a cambered complete tunnel lining crack image (such as the third layer from the top in fig. 5); and (3) decomposing the complete tunnel lining crack image with radian into a plane image through UV (namely decomposing the complete tunnel lining crack image with radian into the plane image from a stereo image), and unfolding the image according to the cambered surface angle of the lining to obtain a lining crack distribution plane image (such as the fourth layer from the top in the figure 5).
Based on the content of the method embodiment, as an optional embodiment, the method for evaluating the tunnel lining crack disease provided in the embodiment of the present invention, where the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism is obtained by using a box counting method of a three-dimensional fractal theory, includes: covering the three-dimensional image of the tunnel lining crack triangular prism by using orthocubes with different side lengths, and recording the side lengths of the orthocubes and the corresponding number of the orthocubes covering the crack triangular prism in the three-dimensional image of the tunnel lining crack triangular prism; performing least square fitting on the logarithm of the side length and the logarithm of the number of the orthocubes; and obtaining the slope of the straight line after least square fitting, wherein the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism is the absolute value of the slope of the straight line. Specifically, a three-dimensional image of a tunnel lining crack triangular prism is subjected to orthocubic division, the side length r of a cube and the number N (r) of cubes required by the orthocubic with the side length r to cover all cracks are obtained, and data points (lgr, lgN (r)) are fitted by a least square method; and (3) whether the data points (lgr, lgN (r)) are linearly related, if not, the calculation is interrupted, if so, the slope k of a straight line fitted by the data points is calculated, and the fractal dimension D of the crack is further calculated to be | k |.
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for evaluating a tunnel lining crack disease provided in the embodiment of the present invention, where dividing the disease grade of the tunnel lining crack according to the fractal dimension includes: and calculating the fractal dimension and the health value of the crack diseases by using a box-in-box method and a fuzzy mathematical method respectively, and establishing grade division of the crack diseases based on the fractal dimension according to the corresponding relation between the fractal dimension and the health value to obtain the range of fractal dimension intervals corresponding to different disease grades. Specifically, the fractal dimension D of different tunnel lining crack diseases and the tunnel lining crack health value H are respectively solved; establishing a D-H scatter diagram by taking D as an abscissa and H as an ordinate; dividing the ordinate H into four grades according to the disease degree from light to heavy, and dividing an evaluation interval corresponding to the ordinate interval according to the abscissa D; disease grades of tunnel lining cracks divided according to fractal dimension are established, and are shown in table 1.
TABLE 1
| Crack disease rating | B | 1A | 2A | 3A |
| Degree of fracture damage | Light and slight | In general | Is more serious | Severe severity of disease |
| Fractal dimension D | 2.0-2.05 | 2.05-2.6 | 2.6-2.75 | 2.75-3.0 |
Based on the content of the foregoing method embodiment, as an optional embodiment, the method for evaluating a tunnel lining crack damage provided in the embodiment of the present invention, after dividing the damage grade of the tunnel lining crack, further includes: and acquiring the fractal dimension of the field tunnel lining crack in real time, and if the fractal dimension of the field tunnel lining crack falls into an interval range of the fractal dimension interval range, determining the disease grade of the field tunnel lining crack as one grade of the disease grades corresponding to the fractal dimension interval range.
According to the method for evaluating the tunnel lining crack diseases, provided by the embodiment of the invention, the fractal dimension of the tunnel lining cracks is calculated by collecting and identifying the image of the tunnel lining cracks, the crack disease evaluation mechanism based on the fractal dimension is constructed according to the relation between the fractal dimension and the health value, the grade evaluation can be carried out on the diseases of the tunnel lining cracks relatively simply and conveniently, the evaluation process does not depend on subjective assignment or expert experience, and the evaluation result is objective and accurate.
The implementation basis of the various embodiments of the present invention is realized by programmed processing performed by a device having a processor function. Therefore, in engineering practice, the technical solutions and functions thereof of the embodiments of the present invention can be packaged into various modules. Based on this reality, on the basis of the above embodiments, embodiments of the present invention provide a tunnel lining crack damage evaluation device for performing the tunnel lining crack damage evaluation method in the above method embodiments. Referring to fig. 2, the apparatus includes: the planar image module is used for acquiring images of the tunnel lining cracks, and superposing the images to obtain planar images of the distribution of the tunnel lining cracks; the crack three-dimensional image module is used for processing the tunnel lining crack distribution plane image to obtain a triangular prism three-dimensional image of the tunnel lining crack distribution; the fractal dimension module is used for obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and the disease grading module is used for dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
The device for evaluating the tunnel lining crack diseases adopts various modules in the figure 2, collects and identifies the tunnel lining crack image, calculates the fractal dimension of the tunnel lining crack, constructs a crack disease evaluation mechanism based on the fractal dimension according to the relationship between the fractal dimension and the health value, can evaluate the grade of the tunnel lining crack diseases more simply and conveniently, does not depend on subjective assignment or expert experience in the evaluation process, and has objective and accurate evaluation results.
It should be noted that, the apparatus in the apparatus embodiment provided by the present invention may be used for implementing methods in other method embodiments provided by the present invention, except that corresponding function modules are provided, and the principle of the apparatus embodiment provided by the present invention is basically the same as that of the apparatus embodiment provided by the present invention, so long as a person skilled in the art obtains corresponding technical means by combining technical features on the basis of the apparatus embodiment described above, and obtains a technical solution formed by these technical means, on the premise of ensuring that the technical solution has practicability, the apparatus in the apparatus embodiment described above may be modified, so as to obtain a corresponding apparatus class embodiment, which is used for implementing methods in other method class embodiments. For example:
based on the content of the above device embodiment, as an optional embodiment, the device for evaluating a tunnel lining crack damage provided in the embodiment of the present invention further includes: a second module for implementing the acquiring of the image of the tunnel lining crack, comprising: dividing the tunnel lining containing the cracks into a plurality of sections, and carrying out block shooting on the section lining at the center of the pavement of each section to obtain a block image of the cracks of the tunnel lining of the section.
Based on the content of the above device embodiment, as an optional embodiment, the device for evaluating a tunnel lining crack damage provided in the embodiment of the present invention further includes: a third module, configured to superimpose the images to obtain a planar image of a tunnel lining crack distribution, including: carrying out curvature modification on the block image to obtain a block image with the same radian as the tunnel lining; superposing the block images to obtain a tunnel lining crack image with radian; and carrying out UV decomposition on the tunnel lining crack image with the radian, and unfolding according to the arc surface angle of the tunnel lining to obtain a tunnel lining crack distribution plane image.
Based on the content of the above device embodiment, as an optional embodiment, the device for evaluating a tunnel lining crack damage provided in the embodiment of the present invention further includes: a fifth module, configured to obtain a fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by using a box counting method of a three-dimensional fractal theory, where the module includes: covering the three-dimensional image of the tunnel lining crack triangular prism by using orthocubes with different side lengths, and recording the side lengths of the orthocubes and the corresponding number of the orthocubes covering the crack triangular prism in the three-dimensional image of the tunnel lining crack triangular prism; performing least square fitting on the logarithm of the side length and the logarithm of the number of the orthocubes; and obtaining the slope of the straight line after least square fitting, wherein the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism is the absolute value of the slope of the straight line.
Based on the content of the above device embodiment, as an optional embodiment, the device for evaluating a tunnel lining crack damage provided in the embodiment of the present invention further includes: a sixth module, configured to implement the dividing of the disease grade of the tunnel lining crack according to the fractal dimension, including: and calculating the fractal dimension and the health value of the crack diseases by using a box-in-box method and a fuzzy mathematical method respectively, and establishing grade division of the crack diseases based on the fractal dimension according to the corresponding relation between the fractal dimension and the health value to obtain the range of fractal dimension intervals corresponding to different disease grades.
Based on the content of the above device embodiment, as an optional embodiment, the device for evaluating a tunnel lining crack damage provided in the embodiment of the present invention further includes: a seventh module, configured to implement after the disease grade of dividing the tunnel lining cracks, further include: and acquiring the fractal dimension of the field tunnel lining crack in real time, and if the fractal dimension of the field tunnel lining crack falls into an interval range of the fractal dimension interval range, determining the disease grade of the field tunnel lining crack as one grade of the disease grades corresponding to the fractal dimension interval range.
The method of the embodiment of the invention is realized by depending on the electronic equipment, so that the related electronic equipment is necessarily introduced. To this end, an embodiment of the present invention provides an electronic apparatus, as shown in fig. 3, including: at least one processor (processor)301, a communication Interface (Communications Interface)304, at least one memory (memory)302 and a communication bus 303, wherein the at least one processor 301, the communication Interface 304 and the at least one memory 302 are configured to communicate with each other via the communication bus 303. The at least one processor 301 may invoke logic instructions in the at least one memory 302 to perform all or a portion of the steps of the methods provided by the various method embodiments described above.
Furthermore, the logic instructions in the at least one memory 302 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the method embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. Based on this recognition, each block in the flowchart or block diagrams may represent a module, a program segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In this patent, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A tunnel lining crack disease evaluation method is characterized by comprising the following steps: acquiring an image of a tunnel lining crack, and superposing the image to obtain a tunnel lining crack distribution plane image; processing the image of the tunnel lining crack distribution plane image to generate a tunnel lining crack triangular prism three-dimensional image; obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
2. The method for evaluating the tunnel lining crack disease according to claim 1, wherein the step of obtaining the image of the tunnel lining crack comprises the following steps: dividing the tunnel lining containing the cracks into a plurality of sections, and carrying out block shooting on the section lining at the center of the pavement of each section to obtain a block image of the cracks of the tunnel lining of the section.
3. The method for evaluating the tunnel lining crack damage according to claim 2, wherein the step of superposing the images to obtain a tunnel lining crack distribution plane image comprises the steps of: carrying out curvature modification on the block image to obtain a block image with the same radian as the tunnel lining; superposing the block images to obtain a tunnel lining crack image with radian; and carrying out UV decomposition on the tunnel lining crack image with the radian, and unfolding according to the arc surface angle of the tunnel lining to obtain a tunnel lining crack distribution plane image.
4. The method for evaluating the tunnel lining crack disease according to claim 3, wherein the step of obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by using a box counting method of a three-dimensional fractal theory comprises the following steps: covering the three-dimensional image of the tunnel lining crack triangular prism by using orthocubes with different side lengths, and recording the side lengths of the orthocubes and the corresponding number of the orthocubes covering the crack triangular prism in the three-dimensional image of the tunnel lining crack triangular prism; performing least square fitting on the logarithm of the side length and the logarithm of the number of the orthocubes; and obtaining the slope of the straight line after least square fitting, wherein the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism is the absolute value of the slope of the straight line.
5. The method for evaluating the tunnel lining crack disease according to claim 4, wherein the step of dividing the disease grade of the tunnel lining crack according to the fractal dimension comprises the following steps: and calculating the fractal dimension and the health value of the crack diseases by using a box-in-box method and a fuzzy mathematical method respectively, and establishing grade division of the crack diseases based on the fractal dimension according to the corresponding relation between the fractal dimension and the health value to obtain the range of fractal dimension intervals corresponding to different disease grades.
6. The method for evaluating the tunnel lining crack damage according to claim 5, wherein after the classification of the tunnel lining crack damage, the method further comprises the following steps: and acquiring the fractal dimension of the field tunnel lining crack in real time, and if the fractal dimension of the field tunnel lining crack falls into an interval range of the fractal dimension interval range, determining the disease grade of the field tunnel lining crack as one grade of the disease grades corresponding to the fractal dimension interval range.
7. A tunnel lining crack disease evaluation device is characterized by comprising:
the planar image module is used for acquiring images of the tunnel lining cracks, and superposing the images to obtain planar images of the distribution of the tunnel lining cracks; the crack three-dimensional image module is used for processing the tunnel lining crack distribution plane image to obtain a triangular prism three-dimensional image of the tunnel lining crack distribution; the fractal dimension module is used for obtaining the fractal dimension of the three-dimensional image of the tunnel lining crack triangular prism by adopting a box counting method of a three-dimensional fractal theory; and the disease grading module is used for dividing the disease grade of the tunnel lining cracks according to the fractal dimension.
8. An electronic device, comprising:
at least one processor, at least one memory, and a communication interface; wherein the content of the first and second substances,
the processor, the memory and the communication interface are communicated with each other;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 6.
9. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1 to 6.
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