CN114109072A - Comprehensive quantitative detection and repair process for surface cracks of underground structure - Google Patents
Comprehensive quantitative detection and repair process for surface cracks of underground structure Download PDFInfo
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Abstract
The invention discloses a comprehensive quantitative detection and repair process for surface cracks of an underground structure, belonging to the technical field of disease treatment of underground structures and comprising the following steps: dividing underground structures intonA detection section for obtainingImage data of a surface of the subsurface structure; performing image processing, extracting surface crack data, and measuring corresponding crack parameters; obtaining a disease index, establishing a comprehensive quantitative evaluation index of the surface cracks of the underground structure, comparing the comprehensive quantitative evaluation index with an index allowable value, quantitatively evaluating the disease degree of the surface cracks of the underground structure, and identifying a detection section needing repair and treatment; repairing and treating the surface cracks, and providing a repairing process and a repairing effect evaluation method; the method can effectively and scientifically detect, evaluate and repair the crack disease problem on the surface of the structure in the whole life cycle of underground structure construction-operation, and solves the problem that the prior surface crack detection and treatment technology is difficult to scientifically count, classify, identify and quantitatively evaluate the characteristics and the degree of the complicated crack disease.
Description
Technical Field
The invention relates to the technical field of disease treatment of underground structures, in particular to a comprehensive quantitative detection and repair process for surface cracks of an underground structure.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Various underground structures such as tunnels (holes), underground stations, underground chambers and underground comprehensive pipe galleries are buried underground, belong to underground concealed engineering, and can inevitably pass through complex geological conditions to influence strata, such as stratum environments of high ground stress, weak strata, collapsible loess strata, fault fracture zones, strong rich water or high confined water, or influenced and limited by design parameters, concrete construction quality, construction technical level, external environment load disturbance and other various factors, and the underground structures generally have surface cracking and are easy to induce diseases such as water leakage in the construction and operation stages. For example, in the field of current traffic tunnels, a 'ten-tunnel nine-leakage' statement generally exists. The potential safety hazard of the underground structure is greatly increased by the crack damage and the water leakage disease of the underground structure, and certain adverse effects are generated on the safe use and the healthy operation of the underground structure. Therefore, the method is one of the key problems to be solved in the field of underground engineering at present, and is used for accurately evaluating the health state of the underground structure, effectively treating the serious part with the crack diseases and preventing the further deterioration of the diseases.
The inventor finds that the following defects exist in the aspects of detection evaluation and repair treatment of the surface crack diseases of the conventional underground structure at present:
(1) due to the fact that surface cracks are generated on an underground structure, the reasons for generating the surface cracks are complex, and the generation positions, direction angles and the number of the cracks are random, so that the problems of different characteristic crack diseases are difficult to scientifically and statistically identify and quantitatively evaluate by the conventional technical means, and a corresponding crack classification standard and a classification index or quantitative basis for scientifically and reasonably describing the degrees of the different types of crack diseases are lacked;
(2) for the surface crack diseases of the underground structure, as the crack characteristics are complicated and intricate, parameters for describing the crack disease characteristics, such as length, angle, width and the like, also contain multiple influences, the effective comprehensive evaluation of the crack disease degree and the integral health state of the whole underground structure section is difficult to carry out by utilizing the prior art, and corresponding multiple evaluation indexes are lacked, which are the root cause mainly depending on qualitative evaluation at present, and the disease degree is scientifically represented by a system evaluation theory based on multiple influence factors, so that the scientific prevention and control of the diseases can be effectively guided;
(3) in the aspect of underground structure crack detection means, the method is carried out by using a conventional crack meter, an angle ruler or manual visiting statistics and the like, so that the problems of low detection efficiency, high detection labor intensity, poor accuracy and the like exist, even if some non-destructive detection means exist in the market at present, the method is generally immature, and a complete set of effective process method is not formed to guide engineering practice;
(4) in the aspect of underground structure crack treatment, the crack characteristics generated due to different reasons are different, so that the repair treatment methods of different types of cracks have certain difference, but the existing crack repair treatment generally depends on an experience analogy mode for construction, and a set of complete repair treatment process aiming at different types of underground structure cracks is not formed;
(5) after the underground structure crack is repaired by the conventional technology, the repair is considered to be finished, and a quantitative detection and evaluation method for the crack repair treatment effect in the operation and maintenance whole life cycle is lacked, so that the problem of cracking and damage after repair is easily caused again, and therefore, the method is also an important content for crack repair treatment for long-term scientific evaluation of the repair treatment effect, and is very important for long-term safety and healthy operation and maintenance of the underground structure.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a comprehensive quantitative detection and repair process for surface cracks of an underground structure, the three-dimensional image of the inner surface of the underground structure can be obtained through the image, the information of the number, the length, the width and the like of the cracks can be obtained, the cracks are divided into three types of axial, oblique and annular, and an axial crack disease index, an oblique crack disease index, an annular crack disease index and a comprehensive quantitative evaluation index of crack diseases are established, a complete set method for repairing and treating surface cracks and a quantitative evaluation method for repairing and treating effects are provided, and the problems that the conventional underground structure surface crack detection and treatment technology is difficult to scientifically count, classify, identify and quantitatively evaluate the characteristics and the degree of complicated crack diseases, is difficult to guide scientific repairing and treating of different types of cracks, and is difficult to accurately control the whole health of the underground structure are effectively solved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a comprehensive quantitative detection and repair process for surface cracks of an underground structure, which comprises the following steps:
Step 4, establishing any one of the second
A detection section (
) Surface axial crack disease index of underground structure
Disease index of diagonal cracks
And circumferential crack disease index
；
Step 5, establishing any one of the second
A detection section (
) Comprehensive quantitative evaluation index for surface cracks of underground structure
And is combined with the index allowable value
Comparing, quantitatively judging the degree of the surface crack disease of the underground structure of each detection section, and identifying the detection section needing to be repaired and treated;
step 6, carrying out surface crack repair treatment on the underground structure of the section to be repaired by using a plastering method, a spray coating method, an external adhesion method or a grouting method;
step 7, after the restoration treatment is finished, establishing comprehensive quantitative evaluation indexes of surface cracks of the underground structure of the restored section
And are combined with
And comparing, and quantitatively judging the repairing and treating effect of the crack diseases on the surface of the underground structure of the section.
The beneficial effects of the invention are as follows:
(1) according to the underground structure trend, surface cracks are divided into three types of cracks of axial direction, oblique crossing and annular direction, an axial crack disease index, an oblique crossing crack disease index and an annular crack disease index are further provided, each crack disease index calculation formula comprises characterization parameters such as the number, the length and the width of the cracks, all crack disease degrees can be reflected integrally, meanwhile, all cracks are classified based on the underground structure trend, long and narrow structural characteristics and stress characteristics of the underground structure can be reflected, and the evaluation process and the result are more scientific.
(2) The invention utilizes the basic theory of multivariate influence factor systematic evaluation, establishes the comprehensive quantitative evaluation index of the cracks, the index comprises various crack disease indexes and is matched with the weight influence factor, the evaluation process is more comprehensive and scientific, not only can quantitatively describe the degree of the crack diseases on the surface of the underground structure in the detection section, but also can comprehensively reflect the influence degree of different types of crack diseases on the integral health state of the underground structure, overcomes the defects of qualitative or empirical evaluation of the conventional technical means, also overcomes the defect that the influence factor of the crack diseases of the integral structure is complex and is difficult to comprehensively evaluate, and provides more scientific representation and evaluation support for the crack diseases of the underground structure.
(3) The invention uses nondestructive testing means such as a three-dimensional laser scanner or an industrial camera to scan and test the interior of the underground structure, can quickly obtain the three-dimensional image of the inner surface of the underground structure and acquire the information such as the number, the length, the width and the like of cracks, saves manpower and material resources, can avoid unnecessary damage to the underground structure, can randomly detect the crack diseases on the surface of the underground structure for a long time, and effectively monitors the problem of secondary cracking after repair.
(4) The invention provides a complete set of crack repairing and treating methods such as a plastering method, a spray layer method, an external adhesion method, a grouting method and the like, which can meet the repairing and treating of common cracks of different types in an underground structure; meanwhile, a quantitative evaluation index of the surface crack repair treatment effect is established, a specific effect evaluation method is provided, the long-term treatment effect and the long-term quantitative evaluation of the crack repair treatment effect can be realized, the repeated occurrence of crack damage diseases of the structure is avoided, and the underground structure crack repair treatment is more scientific and effective.
(5) The invention provides a complete process for detecting and repairing cracks in the whole life cycle of underground structure construction-operation and maintenance, which can make up the defects of single detection content, single detection means, single detection time period and the like commonly existing in the conventional detection and treatment technology, has comprehensive and high-efficiency detection process, can run through any time node of the whole life cycle of the underground structure operation and maintenance, accords with the concept of whole life cycle health control, and effectively improves the informatization and technical management level of the underground structure operation and maintenance detection.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic flow diagram of a comprehensive quantitative detection and remediation process for subsurface fractures in accordance with the present invention;
FIG. 2 is a diagram of a subsurface structure analyzed by three-dimensional laser scanner scan testing in accordance with the present inventionnA schematic representation of a three-dimensional image of the surface within each inspection section;
FIG. 3 is a schematic representation of axial fractures in the surface of a subterranean formation according to the present invention;
FIG. 4 is a schematic representation of a subsurface diagonal fracture of the present invention;
FIG. 5 is a schematic representation of circumferential fractures in the surface of a subterranean formation according to the present invention;
FIG. 6 is a schematic view of a process for repairing surface cracks of a subterranean structure by a plastering method according to the present invention;
FIG. 7 is a schematic illustration of a process for repairing cracks in the surface of a subterranean structure by a layer-blasting method according to the present invention;
FIG. 8 is a schematic illustration of the process of the present invention for repairing surface cracks in a subterranean structure by external bonding;
FIG. 9 is a schematic illustration of a process for repairing a fracture in a surface of a subterranean structure using a grouting method according to the present invention;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1, axial crack; 2. oblique fracture; 3. annular cracks; 4. cement mortar or epoxy resin mortar; 5. early strength concrete or fiber concrete; 6. a binder; 7. high-strength carbon fiber cloth; 8. cement mortar; 9. and (4) grouting holes.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As introduced in the background art, the surface cracks generated on the underground structure are influenced by complex and intricate reasons, and the generation positions, direction angles and the number of the cracks are random, so that the problems of the crack diseases are difficult to scientifically count, classify, identify and quantitatively evaluate by the conventional technical means, the whole health of the underground structure is difficult to accurately control, and further the scientific treatment of the cracks cannot be guided.
Example 1:
in an exemplary embodiment of the present invention, as shown in fig. 1-9, a comprehensive quantitative detection and repair process for surface cracks of a subsurface structure is provided, and for the convenience of understanding, this embodiment is exemplified by a long and narrow subsurface structure which comprises a plurality of subsurface structuresnThe quantitative detection and repair process comprises the following steps:
step 1: after the construction of the underground structure is completed, the underground structure is divided intonA detection section (nIs a positive integer);
in step 1, when the underground structure detection section is divided, the division position is the underground structure deformation joint, and the corresponding detection section isnAnd (4) respectively.
It is understood that in other embodiments, the division may be performed according to the location of the change of the section size or shape of the underground structure, the change of the formation condition, the change of the surrounding environment condition or the load, and the like, and the specific division form is not limited too much.
Step 2: at a certain time t1Scanning and testing the interior of the underground structure of each detection section by using a three-dimensional laser scanner or an industrial camera, and acquiring image data of the surface of the underground structure of each detection section;
the interior of the underground structure is subjected to scanning test by utilizing nondestructive testing means such as a three-dimensional laser scanner or an industrial camera, so that a three-dimensional image of the inner surface of the underground structure can be quickly obtained, manpower and material resources are saved, and unnecessary damage to the underground structure can be avoided.
And step 3: according to the image data obtained in the step 2, image processing analysis is carried out on the image data by using image analysis software, the surface crack data of the underground structure is identified and extracted, and the surface cracks are divided into three types, namely axial cracks 1, oblique cracks 2, annular cracks 3 and the like;
in step 2 and step 3, when the three-dimensional laser scanner is used for scanning test analysis, the method specifically comprises the following steps:
step a: scanning the interior of the underground structure of each detection section by using a three-dimensional laser scanner to obtain point cloud data of the surface of the underground structure of each detection section;
step b: importing the point cloud data into image analysis software of a three-dimensional laser scanner to generate and obtain a three-dimensional image of the underground structure surface of each detection section, wherein the effect schematic diagram is shown in fig. 2;
it is understood that in other embodiments, the point cloud data in step a may be stored in other formats, and imported into other image analysis software, such as 3d media, TopoDOT, TRW, TBC, etc., to be processed and generate a three-dimensional image, which is not limited herein.
Step c: b, according to the three-dimensional image of the surface of the underground structure obtained in the step b, processing and analyzing the image by using image analysis software, such as removing noise, enhancing, restoring, segmenting, extracting characteristics and the like, and identifying and extracting the image data of the surface crack of the underground structure shown in the figure 2;
step d: and c, identifying the extracted crack image data according to the step c, counting and measuring to obtain information such as the position, the number, the angle, the length, the width and the like of the surface crack of the underground structure of each detection section, and dividing the crack into three crack types of an axial crack 1, an oblique crack 2 and an annular crack 3 shown in the figures 3-5 according to the size of an included angle between the trend of the crack and the axial direction of the underground structure.
When an industrial camera is used for scanning test analysis, the method specifically comprises the following steps:
step a': carrying out image acquisition on the surface of the underground structure by utilizing an industrial camera in the underground structure of each detection section;
step b': introducing the collected surface image of the underground structure into image analysis software, such as software of Hexsight, Halcon, CkVision and the like, performing processing analysis on the image such as noise removal, enhancement, restoration, segmentation, feature extraction and the like, and identifying and extracting the surface crack image data of the underground structure;
step c': identifying the extracted crack image data according to the step b', counting and measuring to obtain information such as the position, the number, the angle, the length, the width and the like of the surface crack of the underground structure of each detection section, and dividing the crack into three crack categories of an axial crack 1, an oblique crack 2 and an annular crack 3 shown in the figures 3-5 according to the size of an included angle between the trend of the crack and the axial direction of the underground structure;
in this embodiment, the axial crack 1 is a crack having an angle between the crack direction and the axial direction of the underground structure in a range of [0 ° and 30 °), the oblique crack 2 is a crack having an angle between the crack direction and the axial direction of the underground structure in a range of [30 ° and 60 °), and the circumferential crack 3 is a crack having an angle between the crack direction and the axial direction of the underground structure in a range of [60 ° and 90 °.
And 4, step 4: based on step 3, statistical measurementsTo obtain any one of
A detection section (
) Number of axial cracks 1 in the surface of the underground structure
Average length of
Average width of
(ii) a Number of diagonal cracks 2
Average length of
Average width of
(ii) a Number of circumferential cracks 3
Average length of
Average width of
；
The specific calculation process is as follows: in any one of the second
A detection section (
) Inner and underground knotMean length of axial cracks 1 in the structure surface
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
Detecting the total length of the axial cracks 1 on the surface of the underground structure of the section; mean width of axial cracks 1 in the surface of the underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
Detecting the total width of the axial cracks 1 on the surface of the underground structure of the section;
in any one of the second
A detection section (
) Average length of internal and underground structure surface oblique crack 2
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
Detecting the total length of the oblique cracks 2 on the surface of the underground structure of the section; average width of subsurface structure surface diagonal crack 2
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
Detecting the total width of the oblique cracks 2 on the surface of the underground structure of the section;
in any one of the second
A detection section (
) Average length of circumferential cracks 3 on surface of internal and underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
Detecting the total length of the annular cracks 3 on the surface of the underground structure of the section; average width of circumferential cracks 3 on surface of underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
is as follows
The total width of the circumferential crack 3 on the surface of the underground structure of the section is detected.
And 5: based on step 4, respectively establishing any one of the second
A detection section (
) Disease index of axial crack 1 on surface of underground structure
Disease index of diagonal crack 2
And circumferential crack 3 disease index
；
Specifically, the axial crack 1 disease index
The calculation formula of (2) is as follows:
(ii) a Disease index of diagonal crack 2
The calculation formula of (2) is as follows:
(ii) a Circumferential crack 3 disease index
The calculation formula of (2) is as follows:
。
the method divides the surface cracks of the underground structure into three types of cracks of axial direction, oblique crossing and annular direction based on the trend of the underground structure, further provides an axial crack disease index, an oblique crossing crack disease index and an annular crack disease index, and each crack disease index calculation formula comprises characterization parameters such as the number, the length and the width of cracks, can reflect various crack disease degrees integrally, can reflect the long and narrow structural characteristics and the stress characteristics of the underground structure, and is scientific in evaluation process and result.
Step 6: establishing any one of the first and second disease indexes based on the disease indexes of the surface cracks of the underground structure of each detection section obtained in the step 5
A detection section (
) Comprehensive quantitative evaluation index for surface cracks of underground structure
；
Comprehensive quantitative evaluation index for surface cracks of underground structure
The calculation formula of (2) is as follows:
(ii) a Wherein the content of the first and second substances,
、
、
respectively representing the index sizes of the axial crack 1 disease, the oblique crack 2 disease and the annular crack 3 disease and the influence ratio factors of the index sizes on the influence degree of the underground structure on the healthy operation and the safe use, wherein the sizes of the index sizes meet the requirement of the influence ratio factors on the health operation and the safe use of the underground structure
And comprehensive determination can be carried out according to the safe operation and use requirements of the underground structure. For example, if each disease index
、
、
Respectively A, B, C, A + B + C reflects the total disease index value and the ratio factor of each disease influence
、
、
The sizes can be A/(A + B + C), B/(A + B + C) and C/(A + B + C). On the basis, the influence ratio factor can be used for judging and determining which type of crack is more critical to the safety influence of the underground structure by combining with engineering experience according to the characteristics of specific underground structure types, section sizes, external stratum environment conditions and the like, and further, the size of a certain type of ratio factor is properly adjusted.
And 7: the comprehensive quantitative evaluation index in the step 6
And the allowable value of the index
Comparing, quantitatively judging the degree of surface crack diseases of the underground structure of each detection section, identifying the detection section needing to be repaired and treated, and further realizing comprehensive quantitative evaluation on the health and safe use state of the underground structure;
in this example, the allowable value of the quantitative evaluation index was integrated
The crack disease characteristic limit value is comprehensively determined by the aspects of underground structure burial depth, structure type, section shape and size, safe use function and the like.
Comprehensive quantitative evaluation index
And the allowable value of the index
When making a comparison, if
The detection result shows that the degree of surface crack damage of the underground structure in the detection area is slight, the influence degree on the structure safety and normal use is small, and repair and treatment are not needed; if it is
The method proves that the damage degree of the surface cracks of the underground structure in the detection area is serious, the influence degree on the safety and the normal use of the structure is large, and the restoration and the treatment are needed.
Comprehensive quantitative evaluation index of surface cracks
Is established by using a basic theory of multivariate influence factor system evaluation, and the index comprises various cracksThe disease index is matched with the weight influence factor, the evaluation process is more comprehensive and scientific, the degree of the surface crack diseases of the underground structure in the detection section can be quantitatively described, the influence degree of different types of crack diseases on the integral health state of the underground structure can be comprehensively reflected, and more scientific representation and evaluation support is provided for the crack diseases of the underground structure.
And 8: according to the detection zone needing crack disease repair determined in the step 7, surface crack repair treatment is carried out on the underground structure of the detection zone by using a plastering method, a spraying method, an external adhesion method or a grouting method and the like;
as shown in fig. 6 to 9, this embodiment provides schematic process diagrams for repairing surface cracks of an underground structure by using a plastering method, a spray coating method, an external adhesion method, and a grouting method.
Specifically, the plastering method (fig. 6) is to roughen and clean the periphery of the crack to be treated, and then use cement mortar or epoxy resin mortar 4 to paint and level the crack, so as to repair and treat the crack.
The layer spraying method (fig. 7) is to perform the repair and treatment of the crack by roughening the periphery of the crack to be treated and cleaning the periphery, and then spraying early strength concrete or fiber concrete 5.
The external adhesion method (fig. 8) is that the periphery of the crack to be treated is cleaned, the surface of the crack is coated with the adhesive 6, and then the high-strength carbon fiber cloth 7 is adhered to the crack to repair and treat the crack.
The grouting method (fig. 9) is that the surface concrete of the crack to be treated is roughened, cement mortar 8 is coated to seal the surface concrete, then grouting holes 9 are obliquely drilled in the peripheral area of the crack until the deep part of the crack is formed, and finally, the crack is pressure-poured by using cement slurry or chemical slurry to realize the repair and treatment of the crack part.
The embodiment provides a complete set of fracture repairing and treating methods such as a plastering method, a spray layer method, an external adhesion method, a grouting method and the like, and can meet the repairing and treating of common different types of fractures of an underground structure. For example, the cracks can be divided into a first level, a second level and a third level (the first level has the highest influence degree, and the third level has the lowest influence degree) according to the influence degree of different types of cracks needing to be repaired and treated on the safety and the use of the structure. The primary cracks with the highest importance can be treated by adopting an external bonding method and a grouting method in a combined way, the secondary cracks with the second importance can be treated by adopting one of the external bonding method and the grouting method, and the tertiary cracks with the lowest importance can be directly treated by adopting a plastering method or a spray coating method.
And step 9: a certain time t after the repair and treatment of the crack disease of the underground structure are finished2Repeating the steps 2 to 6 to obtain the comprehensive quantitative evaluation index of the surface crack of the underground structure of the repaired section
；
The method constructs a quantitative evaluation index of the surface crack repairing and treating effect, provides a specific effect evaluation method, can realize the quantitative evaluation of the long-term treating effect and the long-term state after crack repairing, avoids the repeated occurrence of crack damage diseases of the structure, and enables the repairing and treating of the cracks of the underground structure to be more scientific and effective.
Specifically, if the number of crack disease repair sections is as follows
After the repair and treatment of the crack disease of the underground structure are finished, at a certain momentiIn the section, a three-dimensional laser scanner or an industrial camera can be used for scanning and testing the interior of the underground structure of the detection section, image data of the surface of the underground structure of the detection section is acquired and obtained, image analysis software is used for carrying out image processing analysis on the image data, and the repaired surface crack data of the underground structure is identified and extracted;
further statistically measuring to obtain any of the repaired
A detection section (
) Number of axial cracks 1 in the surface of the underground structure
Average length of
Average width of
(ii) a Number of diagonal cracks 2
Average length of
Average width of
(ii) a Number of circumferential cracks 3
Average length of
Average width of
；
The specific calculation process of the repaired surface crack data is as follows: any one after repair
A detection section (
) Average length of axial cracks 1 on surface of underground structure after internal and external repair
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting the total length of the axial cracks 1 on the surface of the underground structure of the section; average width of axial cracks 1 on surface of repaired underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting the total width of the axial cracks 1 on the surface of the underground structure of the section;
any one after repair
A detection section (
) Average length of internal and external repaired underground structure surface oblique crack 2
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting subsurface structure surface skew in a zoneThe total length of the crack 2; average width of 2 diagonal cracks on surface of repaired underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting the total width of the oblique cracks 2 on the surface of the underground structure of the section;
any one after repair
A detection section (
) Average length of circumferential cracks 3 on surface of underground structure after internal and external repair
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting the total length of the annular cracks 3 on the surface of the underground structure of the section; average width of circumferential cracks 3 on surface of repaired underground structure
The calculation formula of (2) is as follows:
wherein, in the step (A),
to be repaired the first
Detecting the total width of the circumferential cracks 3 on the surface of the underground structure of the section;
thirdly, any one of the repaired second one is respectively established
A detection section (
) Disease index of axial crack 1 on surface of underground structure
Disease index of diagonal crack 2
And circumferential crack 3 disease index
；
Wherein, the repaired axial crack 1 disease index
The calculation formula of (2) is as follows:
(ii) a Disease index of repaired oblique crossing crack 2
The calculation formula of (2) is as follows:
(ii) a Disease index of repaired annular crack 3
The calculation formula of (2) is as follows:
；
establishing any one of the repaired first and second disease indexes based on the obtained disease indexes of the surface cracks of the underground structure of the repaired detection zone
A detection section (
) Comprehensive quantitative evaluation index for surface cracks of underground structure
；
Wherein, the repaired surface crack of the underground structure is comprehensively and quantitatively evaluated
The calculation formula of (2) is as follows:
；
、
、
respectively reflecting the influence degrees of axial crack 1 diseases, oblique crack 2 diseases and annular crack 3 diseases on the healthy operation and safe use of the underground structure, and the sizes of the influence factors meet the requirement
And comprehensively determining according to the safe operation and use requirements of the underground structure.
Step 10: will be repairedComprehensive quantitative evaluation index
And the allowable value of the index
And comparing and quantitatively judging the repairing and treating effect of the crack diseases on the surface of the underground structure of the section.
In step 10, when
In time, the repair treatment effect is good, and repeated repair is not needed; when in use
And (3) when the repairing and treating effect is poor, repeating the steps 8-10 until the repairing and treating effect is good.
The embodiment provides a complete process for detecting and repairing cracks in the underground structure construction-operation and maintenance full life cycle, can make up the defects of single detection content, single detection means, single detection time period and the like commonly existing in the conventional detection and treatment technology, is comprehensive and efficient in detection process, can run through any time node of the underground structure operation and maintenance full life cycle, accords with the concept of full life cycle health control, and effectively improves the informatization and technical management level of the underground structure operation and maintenance detection.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A comprehensive quantitative detection and repair process for surface cracks of an underground structure is characterized by comprising the following steps:
step 1, dividing an underground structure to be detected intonA detection section for acquiring eachDetecting image data of a surface of a regional subsurface structure;
step 2, carrying out image processing analysis, identifying and extracting surface crack data of the underground structure, and dividing the surface crack into an axial crack, an oblique crack and an annular crack;
step 3, obtaining any one of the first and second data by statistical measurement
A detection section (
) Number of axial cracks in the surface of the underground structure
Average length of
Average width of
Number of diagonal cracks
Average length of
Average width of
Number of circumferential cracks
Average length of
Average width of
；
Step 4, establishing any one of the second
A detection section (
) Surface axial crack disease index of underground structure
Disease index of diagonal cracks
And circumferential crack disease index
；
Step 5, establishing any one of the second
A detection section (
) Comprehensive quantitative evaluation index for surface cracks of underground structure
And is combined with the index allowable value
Comparing, quantitatively judging the degree of the surface crack disease of the underground structure of each detection section, and identifying the detection section needing to be repaired and treated;
step 6, carrying out surface crack repair treatment on the underground structure of the section to be repaired by using a plastering method, a spray coating method, an external adhesion method or a grouting method;
step 7, after the repair and treatment is finishedAnd establishing comprehensive quantitative evaluation index of surface cracks of repaired underground structure
And are combined with
And comparing, and quantitatively judging the repairing and treating effect of the crack diseases on the surface of the underground structure of the section.
2. The process according to claim 1, wherein in step 1, the underground structure is divided into sections, including but not limited to, the size or shape of the underground structure, deformation joints, formation conditions, ambient conditions or load, and the like.
3. The comprehensive quantitative detection and repair process for surface cracks of underground structures as claimed in claim 1, wherein in step 1 and step 2, the process of acquiring image data and performing image processing analysis comprises:
scanning and testing the interior of the underground structure of each detection section by using a three-dimensional laser scanner or an industrial camera to obtain image data of the surface of the underground structure of each detection section; carrying out image processing analysis of removing noise, enhancing, restoring, segmenting and extracting features on the underground structure by using image analysis software, and identifying and extracting image data of the surface cracks of the underground structure; counting and measuring to obtain the position, number, angle, length and width information of the surface crack of the underground structure of each detection section, and dividing the crack into an axial crack, an oblique crack and an annular crack according to the size of an included angle between the crack trend and the axial direction of the underground structure;
the axial crack is a crack with an included angle between the crack trend and the axial direction of the underground structure within a range of [0 degrees and 30 degrees ], the oblique crack is a crack with an included angle between the crack trend and the axial direction of the underground structure within a range of [30 degrees and 60 degrees, and the circumferential crack is a crack with an included angle between the crack trend and the axial direction of the underground structure within a range of [60 degrees and 90 degrees ].
4. A comprehensive quantitative detection and remediation process for surface fractures of subterranean structures according to claim 1 or 3 characterised in that in step 3, the mean axial fracture length
The calculation formula of (2) is as follows:
，
is as follows
Detecting the total length of axial cracks on the surface of the underground structure of the section; mean width of axial crack
The calculation formula of (2) is as follows:
，
is as follows
Detecting the total width of axial cracks on the surface of the underground structure of the section;
average length of diagonal cracks
The calculation formula of (2) is as follows:
，
is as follows
Detecting the total length of the surface diagonal cracks of the underground structure of the section; average width of diagonal crack
The calculation formula of (2) is as follows:
，
is as follows
Detecting the total width of the oblique cracks on the surface of the underground structure of the section;
mean length of circumferential crack
The calculation formula of (2) is as follows:
，
is as follows
Detecting the total length of the annular cracks on the surface of the underground structure of the section; mean width of circumferential crack
The calculation formula of (2) is as follows:
，
is as follows
And detecting the total width of the annular cracks on the surface of the underground structure of the section.
5. The process according to claim 1, wherein in step 4, the axial crack damage index is
The calculation formula of (2) is as follows:
(ii) a Disease index of diagonal crack
The calculation formula of (2) is as follows:
(ii) a Circumferential crack defect index
The calculation formula of (2) is as follows:
。
6. the process according to claim 5, wherein in step 5, the index for comprehensive quantitative evaluation of surface cracks of the underground structure
Is calculated by the formula：
(ii) a Wherein the content of the first and second substances,
、
、
respectively reflecting the sizes of axial crack diseases, oblique crack diseases and annular crack diseases and the influence ratio factors on the influence degree of the healthy operation and the safe use of the underground structure, wherein the sizes of the influence ratio factors meet the requirement
。
7. The process of claim 1, wherein in step 5, if the determination is made, the method further comprises
The detection result shows that the degree of surface crack damage of the underground structure in the detection area is slight, the influence degree on the structure safety and normal use is small, and repair and treatment are not needed; if it is
The method proves that the damage degree of the surface cracks of the underground structure in the detection area is serious, the influence degree on the safety and the normal use of the structure is large, and the restoration and the treatment are needed.
8. A comprehensive quantitative detection and repair process for subsurface structure surface cracks as claimed in claim 1 or 7, wherein in step 6, the plastering method comprises the steps of: firstly, chiseling and cleaning the periphery of a crack to be treated, and then smearing and leveling by using cement mortar or epoxy resin mortar to realize repair and treatment of the crack;
the spraying method comprises the following steps: firstly, chiseling and cleaning the periphery of a crack to be treated, and then spraying early-strength concrete or fiber concrete to realize repair and treatment of the crack;
the external bonding method comprises the following steps: cleaning the periphery of a crack to be treated, coating an adhesive on the surface of the crack, and sticking the high-strength carbon fiber cloth on the crack to repair and treat the crack;
the grouting method comprises the following steps: the method comprises the steps of firstly chiseling surface concrete of a crack to be treated, smearing cement mortar to seal the surface concrete, then obliquely drilling holes in the peripheral area of the crack until the deep part of the crack is formed, and finally carrying out pressure pouring on the crack by using cement slurry or chemical slurry to realize repair and treatment on the crack part.
9. The process according to claim 1, wherein in step 7, the index for comprehensive quantitative evaluation of surface cracks of the underground structure in the zone after repair
The establishing process and the comprehensive quantitative evaluation index of the surface cracks of the underground structure in the step 5
The establishing processes are consistent, and specifically comprise the following steps:
after the repair and treatment of the underground structure crack diseases are finished, acquiring the image data of the surface of the underground structure of the repair and treatment section again, performing image processing analysis to obtain various cracks and crack data, further acquiring various disease indexes, and establishing comprehensive quantitative evaluation indexes of the surface cracks of the underground structure of the section after repair
。
10. The process of claim 9 for the integrated quantitative detection and remediation of surface cracks in subterranean structures if
The repairing and treating effect is good; if it is
And (4) explaining that the repairing treatment effect is poor, repairing is required to be carried out again until the repairing treatment effect is good.
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