Method for detecting and repairing interlayer bubbles of glue filling layer

Abstract

The present application relates to a method for detecting and repairing glue layer interlayer bubbles, comprising: laying an electrode net on a concrete base, the electrode net being composed of a plurality of metal strips or metal wires arranged in a crisscross manner; applying conductive glue on the concrete base and the electrode net, the glue layer covering the electrode net, the thickness of the glue layer being greater than the height of the electrode net, and the end of the metal strip or metal wire being able to extend out of the glue layer; covering a steel plate above the glue layer and performing pressure fixation to make the glue layer solidify; connecting and measuring the resistance value of each two metal strips or between each two metal strips using a resistance measuring device; processing and analyzing the resistance value data using a scalar field visualization algorithm to obtain a resistance value distribution cloud diagram of the glue layer; the position with a resistance value greater than a threshold value in the cloud diagram being a bubble; after locating the bubble through the cloud diagram, drilling a hole in the steel plate above the bubble, and then punching the conductive glue into the bubble to fill the bubble and also fill the corresponding hole in the steel plate.

Description

Technical Field

[0001] This invention belongs to the field of detection and repair technology of air bubbles in adhesive layers of civil engineering structures, and specifically relates to a method for detecting and repairing air bubbles between adhesive layers. Background Technology

[0002] In the field of civil engineering, such as when bonding steel plates, air bubbles inevitably form between the glue layers. The presence of air bubbles affects the quality of the glue layer. There is no glue inside the air bubbles, the air bubbles are of different sizes, and the air bubbles appear randomly, resulting in uneven bonding force on the overall steel plate bonding surface. Traditional air bubble detection methods mainly include: (1) Manual tapping method: tapping the surface of the steel plate with a small hammer and judging the density of the glue layer based on the sound. This method is simple to operate, but the detection accuracy is low and it cannot accurately locate the air bubble. (2) Sampling detection method: sampling the steel plate, removing a part of the steel plate, and directly observing the glue layer. This method has high accuracy but destroys the adhesive structure, has low detection coverage, and cannot achieve comprehensive detection. (3) Scanner detection technology: it can detect the thickness of the glue layer and some defects, but the equipment is bulky, the operation is complicated, and the detection capability for small air bubbles is limited. (4) Infrared thermal imaging detection: identifying glue layer defects through thermal imaging technology, but it is easily affected by the ambient temperature, the detection accuracy is unstable, and the cost is high. As can be seen from the above, existing methods and technologies for detecting air bubbles in adhesive layers generally suffer from problems such as low detection accuracy, high false negative rate, poor small bubble recognition rate, low detection coverage, and destructive testing.

[0003] Furthermore, existing testing technologies lack organic integration with the adhesive layer material itself, failing to form an integrated testing and repair system. Typically, after bubbles are discovered, extensive dismantling of steel plates is required for repair, resulting in long construction periods, high costs, and significant structural damage. How to implement comprehensive non-destructive testing and repair without damaging the adhesive layer is a challenge faced by those skilled in the art. Summary of the Invention

[0004] To address the above problems, this invention provides a method for detecting and repairing air bubbles between adhesive layers, including: S1: Lay an electrode mesh on a concrete base surface. The electrode mesh is composed of several metal strips or wires that are crisscrossed. S2: Apply conductive adhesive to the concrete substrate and the electrode mesh. The adhesive layer covers the electrode mesh, and the thickness of the adhesive layer is greater than the height of the electrode mesh. The ends of the metal strips or wires can extend out of the adhesive layer. S3: Cover the adhesive layer with a steel plate and apply pressure to fix it, so that the adhesive layer can cure. S4: Use a resistance measuring device to connect and measure the resistance between every two metal strips or every two metal wires; S5: Use the scalar field visualization algorithm to process and analyze the resistance data to obtain a resistance distribution cloud map of the adhesive layer; locations in the cloud map where the resistance value is greater than the threshold are bubbles. S6: After locating the bubble using the cloud map, drill a hole in the steel plate above the bubble, then inject conductive adhesive into the bubble to fill it, and at the same time fill the corresponding drilled hole in the steel plate.

[0005] This invention utilizes a uniformly distributed electrode mesh to fully contact the conductive adhesive layer, effectively creating a uniform sensing network within the adhesive layer. After the adhesive layer cures, it bonds the steel plate, electrode mesh, and concrete substrate together. For subsequent testing, each metal strip or wire acts as an electrode. A DC voltage is applied to each electrode of the resistance measuring device, measuring the resistance between every two metal strips or wires. Since the conductive adhesive layer between each pair of metal strips or wires has a relatively low resistance, the resistance increases if air bubbles are present within the adhesive layer. Larger bubbles result in higher resistance, allowing for the determination of the approximate location and size of the bubbles. This invention establishes a connection between resistance value and bubble detection, enabling non-destructive detection of bubbles throughout the conductive adhesive layer. The detection is convenient and rapid, covering the entire adhesive layer area with an extremely low false negative rate, high recognition rate, and good accuracy. After locating the bubbles, targeted adhesive replenishment and bubble removal are performed, achieving targeted non-destructive repair.

[0006] Optionally, the longitudinal section of the metal strips of the electrode mesh is T-shaped. The metal strips include two slender strip plates with a certain width, which are perpendicular to each other to form a T-shape. The vertical strip plate is used to connect the concrete base surface, and the horizontal strip plate is located inside the adhesive layer. The two metal strips are connected to form a cross shape at the intersection, and the longitudinal section of each metal strip still maintains the T-shape.

[0007] Optionally, the adhesive layer is provided with a skeleton mesh, which includes a number of crisscrossing skeleton rods to form a matrix grid. The grid of the skeleton mesh corresponds one-to-one with the grid of the electrode mesh, and the skeleton rods of the skeleton mesh correspond one-to-one with the metal strips of the electrode mesh. The frame rod consists of two separate protective plates, which are symmetrically arranged with the corresponding vertical strip plate as the center line. The two protective plates correspond to the two sides of the horizontal strip plate respectively.

[0008] Further optionally, the material of the protective plate is a rigid insulating material, which does not affect the resistance measurement of the adhesive layer between the metal strips; the upper middle part of the protective plate is curved and protrudes in a direction away from the corresponding other protective plate, and the bottom of the protective plate is vertical, which facilitates connection to the concrete base surface; The upper middle part of the guard plate has a perforated slit, allowing one end of the horizontal strip to pass through the slit; the perforated slit of the guard plate is parallel to the horizontal strip, and the length of the perforated slit is less than the length of the guard plate.

[0009] Optionally, the lower surface of the steel plate is provided with a downwardly extending fixing mesh. The fixing mesh consists of several steel sheets arranged in a crisscross pattern to form a matrix grid. The grid of the fixing mesh corresponds one-to-one with the grid of the electrode mesh, and the steel sheets of the fixing mesh correspond one-to-one with the metal strips of the electrode mesh. The steel sheets are vertically arranged, with their tops fixedly connected to the lower surface of the steel plate and their bottoms extending downwards to between the two guard plates of the corresponding frame rod. When the steel plate is bonded to the adhesive layer, the steel sheet and the corresponding metal strip are on the same vertical plane, but the bottom end of the steel sheet does not contact the metal strip to avoid the metal strip from electrically connecting to the steel plate and causing a short circuit.

[0010] Optionally, in step S1, the concrete substrate is a horizontal and flat surface. When the electrode mesh is composed of metal wires, the electrode mesh is first flattened. After the concrete substrate is completely cured, the electrode mesh is laid flat on the upper surface of the concrete substrate, so that the lower surface of the electrode mesh is in uniform contact with the upper surface of the concrete substrate, which facilitates the uniform application of adhesive in step S2.

[0011] Optionally, in step S1, the concrete base surface is a horizontal and flat surface. When the electrode mesh is composed of T-shaped metal strips, before the concrete base surface is completely cured, the various protective plates of the skeleton mesh are first inserted and installed with the corresponding metal strips of the electrode mesh, and the corresponding hollow gaps are passed through the two sides of the horizontal strip plate respectively. Then, the bottom of each vertical strip plate and the vertical bottom of each guard plate are embedded into the upper surface of the concrete base until the concrete base is completely cured, and the bottom of the electrode mesh and the skeleton mesh are fixed to the concrete base.

[0012] Optionally, in step S3, the steel sheet below the steel plate is inserted into the corresponding skeleton rod, and the colloid inside the skeleton rod covers the steel sheet, with the bottom end of the steel sheet not contacting the corresponding horizontal strip plate below.

[0013] Optionally, in step S4, the resistance measuring device applies the same voltage, such as a 5V DC voltage, between every two metal bars or every two metal wires. The resistance measuring device is connected to a processing and analysis terminal (e.g., a computer) to transmit the real-time resistance value data to the terminal's data analysis software.

[0014] Optionally, in step S5, the data analysis software performs scalar field visualization algorithm processing and analysis on the resistance value data, where the scalar is the resistance value. Then, with the help of image processing technology, a resistance value distribution cloud map of the adhesive layer is obtained. This cloud map corresponds to the entire adhesive layer. In this cloud map, the position where the resistance value is less than 1Ω indicates that there are no air bubbles, and the position where the resistance value is greater than 8Ω indicates that there are air bubbles. The scalar field visualization algorithm can also be used to identify and locate bubble coordinates and bubble size, making it easier to control the amount of glue applied during repair.

[0015] In step S6, a hole is drilled in the steel plate above the center of the bubble. The hole is perpendicular to the steel plate and penetrates through it. Then, the adhesive is injected into the hole and the bubble cavity using a pneumatic adhesive injection device until the adhesive is flush with the upper surface of the steel plate. After the adhesive has cured, it can naturally seal the hole. After all bubbles have been repaired, repeat step S4. If all resistance values ​​are below 1Ω, it means there are no bubbles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the principle and structure of a method for detecting and repairing air bubbles between adhesive layers. Figure 2 A schematic diagram of an electrode mesh composed of metal wires; Figure 3 A schematic diagram of the electrode mesh and the skeleton mesh; Figure 4 This is a top view of the electrode mesh and the skeleton mesh at the network nodes.

[0017] Among them, 1-concrete base surface, 2-electrode mesh, 3-metal wire, 4-metal strip, 5-adhesive layer, 6-steel plate, 7-drill hole, 8-vertical strip plate, 9-horizontal strip plate, 10-protective plate, 11-steel sheet. Detailed Implementation

[0018] This embodiment provides a method for detecting and repairing air bubbles between adhesive layers, such as... Figures 1-4 As shown, it includes: S1: An electrode mesh 2 is laid on a concrete base surface 1. The electrode mesh 2 is composed of several metal strips 4 or metal wires 3 arranged in a crisscross pattern. S2: Apply conductive adhesive to the concrete base 1 and the electrode mesh 2. The adhesive layer 5 covers the electrode mesh 2. The thickness of the adhesive layer 5 is greater than the height of the electrode mesh 2. The end of the metal strip 4 or the metal wire 3 can extend out of the adhesive layer 5. S3: Cover the adhesive layer 5 with a steel plate 6 and apply pressure to fix it, so that the adhesive layer 5 can be cured; S4: Use a resistance measuring device to connect and measure the resistance between every two metal strips 4 or every two metal wires 3; S5: The resistance data is processed and analyzed using a scalar field visualization algorithm to obtain a resistance distribution cloud map of adhesive layer 5; locations in the cloud map where the resistance value is greater than the threshold are bubbles; S6: After locating the bubble using the cloud map, drill a hole in the steel plate 6 above the bubble, then inject conductive adhesive into the bubble to fill it, and at the same time fill the corresponding drilled hole 7 on the steel plate 6.

[0019] Optionally, the interlaced metal wires 3 of the electrode mesh 2 form a matrix grid.

[0020] Optionally, the metal strips 4 of the electrode mesh 2 have a T-shaped longitudinal section. Each metal strip 4 comprises two slender strips of a certain width, perpendicular to each other to form a T-shape. The vertical strip 8 connects to the concrete base surface 1, and the horizontal strip 9 is located inside the adhesive layer 5. The two metal strips 4 intersect to form a cross shape, and the longitudinal section of each metal strip 4 maintains a T-shape. The two metal strips 4 can be integrally formed or welded together.

[0021] Optionally, the adhesive layer 5 is provided with a skeleton mesh inside. The skeleton mesh includes several skeleton rods that are crisscrossed to form a matrix grid. The grid of the skeleton mesh corresponds one-to-one with the grid of the electrode mesh 2, and the skeleton rods of the skeleton mesh correspond one-to-one with the metal strips 4 of the electrode mesh 2. The frame rod includes two separate protective plates 10. The two protective plates 10 are symmetrically arranged with the corresponding vertical strip plate 8 as the center line. The two protective plates 10 correspond to the two sides of the horizontal strip plate 9 respectively.

[0022] Further optionally, the material of the protective plate 10 is a rigid insulating material, such as rigid plastic, which does not affect the resistance measurement of the adhesive layer 5 between the metal strips 4; the upper middle part of the protective plate 10 has an arc and protrudes in a direction away from the corresponding other protective plate; the bottom of the protective plate 10 is vertical, which facilitates connection to the concrete base surface 1. The upper middle part of the guard plate 10 has a perforated slit, allowing one end of the horizontal strip plate 9 to pass through the slit; the perforated slit of the guard plate is parallel to the horizontal strip plate 9, and the length of the perforated slit is less than the length of the guard plate.

[0023] The horizontal and vertical frame rods intersect to form a hollow cross shape, which internally surrounds the cross-shaped area where two metal strips 4 intersect. The connecting guard plate 10 of the two frame rods can be integrally formed or plugged in. The overall frame mesh can be divided into upper and lower parts. The upper part is integrally formed, and the lower part is integrally formed. The dividing line between the upper and lower parts is the hollow gap of each guard plate, and the connecting part between the upper and lower parts is the end of each guard plate.

[0024] In one specific implementation, a metal strip 4 is correspondingly set with the guard plates on both sides. Specifically, the bottom of the vertical strip plate 8 is inserted into the concrete base 1 to fix the metal strip 4; a guard plate is set on each of the left and right sides of the metal strip 4, with the protruding side of the guard plate 10 facing outward; the bottom of the guard plate 10 is inserted into the concrete base 1 to fix the guard plate; the horizontal strip plates 9 at both ends of the metal strip 4 correspond to the positions where there are no perforations at the ends of the guard plates, and the width of the horizontal strip plates 9 at both ends of the metal strip 4 is smaller than the width of the horizontal strip plates 9 corresponding to the perforations of the guard plates, so that the horizontal strip plates 9 at both ends of the metal strip 4 are located between the two guard plates, and this position is the end of the guard plate without any perforations.

[0025] Optionally, the lower surface of the steel plate 6 is provided with a downwardly extending fixing mesh. The fixing mesh includes several steel sheets 11 arranged in a crisscross pattern to form a matrix grid. The grid of the fixing mesh corresponds one-to-one with the grid of the electrode mesh 2, and the steel sheets 11 of the fixing mesh correspond one-to-one with the metal strips 4 of the electrode mesh 2. The steel sheets 11 are vertically arranged, with their tops fixedly connected to the lower surface of the steel plate 6, and their bottoms extending downwards to between the two guard plates of the corresponding skeleton rod. When the steel plate 6 is bonded to the adhesive layer 5, the steel sheet 11 and the vertical strip plate 8 of the corresponding metal strip 4 are on the same vertical plane, but the bottom end of the steel sheet 11 does not contact the metal strip 4 to avoid the metal strip 4 being electrically connected to the steel plate 6 and causing a short circuit.

[0026] Optionally, in step S1, the concrete base surface 1 is a horizontal and flat surface. When the electrode mesh 2 is composed of metal wires 3, the electrode mesh 2 is first flattened. After the concrete base surface 1 is completely cured, the electrode mesh 2 is laid flat on the upper surface of the concrete base surface 1, so that the lower surface of the electrode mesh 2 is in uniform contact with the upper surface of the concrete base surface 1, which facilitates the uniform application of adhesive in step S2.

[0027] Optionally, in step S1, the concrete base surface 1 is a horizontal and flat surface. When the electrode mesh 2 is composed of T-shaped metal strips 4, before the concrete base surface 1 is completely cured, the various protective plates of the skeleton mesh are first inserted and installed with the corresponding metal strips 4 of the electrode mesh 2, and the corresponding hollow gaps are respectively passed through the two sides of the horizontal strip plate 9. Then, the bottom of each vertical strip plate 8 and the vertical bottom of each protective plate are embedded into the upper surface of the concrete base 1 until the concrete base 1 is completely cured, and the bottom of the electrode mesh 2 and the skeleton mesh are fixed on the concrete base 1.

[0028] In step S2, adhesive is applied according to existing technology. The traditional technique is to apply adhesive directly to the concrete substrate 1 and then directly bond the steel plate 6. Generally, the steel plate 6 has a large area (e.g., tens of square meters). The thickness of the adhesive layer 5 on a large surface is not easy to control, and uneven thickness is likely to occur. After bonding the steel plate 6, air bubbles are more likely to appear.

[0029] The electrode mesh 2, composed of metal wires 3, has a certain thickness (e.g., the outer diameter of the metal wires 3 is 1-2 mm). It can form a certain height of isolation mesh on the concrete substrate 1, constraining the adhesive layer 5 to some extent. However, the height of the metal wires 3 is relatively low, resulting in a weak constraint on the adhesive layer 5. Furthermore, the method provided by this invention requires that the electrode mesh 2 not contact the steel plate 6. The conductivity of the steel plate 6 is superior to that of the conductive adhesive layer 5. If the electrode mesh 2 contacts the steel plate 6, a sudden drop in resistance will occur after energization, making this invention impossible to implement. The electrode mesh 2, consisting solely of metal wires 3, relies solely on the adhesive layer 5 to support the steel plate 6. When the area and weight of the steel plate 6 are large, it is not easy to control. Therefore, this invention also proposes a form where T-shaped metal strips 4 are combined with a skeleton mesh.

[0030] The electrode mesh 2, composed of T-shaped metal strips 4, has higher strength and can be embedded within the concrete substrate 1. The electrode mesh 2 itself exhibits good stability and is not easily displaced, providing a solid foundation for the accuracy of subsequent resistance value distribution cloud maps and making bubble positioning more accurate. The bottom of the protective plate is embedded within the concrete substrate 1, further enhancing the stability of the skeleton mesh and preventing it from being affected by the flow of the adhesive layer 5. This is equivalent to having a skeleton layer inside the adhesive layer 5, increasing its strength. Traditional technologies only have one adhesive layer 5, which gradually ages in the external environment over long-term use, affecting its adhesion to the concrete substrate 1 and the steel plate 6. In this invention, the adhesive layer 5 has a composite network skeleton composed of the electrode mesh 2 and the skeleton mesh. This composite network skeleton connects the concrete substrate 1 and the adhesive layer 5, improving the connection performance between the adhesive layer 5 and the concrete substrate 1, as well as the strength of the adhesive layer 5 itself.

[0031] The horizontal strip plate 9 extends from both ends of the side guard plates, thus contacting the conductive adhesive layer 5 to establish the basis for electrical connection. The horizontal strip plate 9 is located at the lower part of the arc-shaped portion of the guard plate, and the top of the guard plate may contact the lower surface of the steel plate 6 to support the steel plate 6, or it may not.

[0032] In step S2, the grids of the composite network skeleton and the internal spaces of the skeleton rods can be filled one by one first. Using the composite network skeleton as a reference and mold, it is easier to control the thickness of the adhesive layer 5 at various points on the concrete base surface 1, making the adhesive layer 5 easier to control. The length of the metal strip 4 of the electrode mesh 2 is greater than the length and width of the concrete base surface 1, so that the end of the metal strip 4 can extend out of the adhesive layer 5, which is convenient for connecting the resistance measuring device. After the resistance value is completely measured, the metal strip 4 outside the adhesive layer 5 can be cut off.

[0033] Optionally, in step S3, the steel plate is fixed above the adhesive layer using existing technology, such as by using an inverted suspension technique, or by using sticks and wooden boards for support, or by using anchor bolts to partially connect to the concrete base. The steel sheet 11 below the steel plate 6 is inserted into the corresponding skeleton rod. The colloid inside the skeleton rod covers the steel sheet 11, and the bottom end of the steel sheet 11 does not contact the corresponding horizontal strip plate 9 below.

[0034] If the lower surface of steel plate 6 contacts the top of the frame rod, the frame rod provides support, supporting steel plate 6 and steel sheet 11 and preventing steel sheet 11 from contacting the horizontal strip plate 9. Steel sheet 11 is vertical and inserted into the adhesive layer 5. This increases point contact bonding between steel sheet 11 and adhesive layer 5, improving the connection stability, in addition to the surface contact bonding between steel plate 6 and adhesive layer 5. Furthermore, two protective plates on both sides of steel sheet 11 limit misalignment between steel plate 6 and adhesive layer 5.

[0035] In step S6, when repairing air bubbles, holes need to be drilled at the corresponding positions on the steel plate 6. Drilling itself will cause significant vibration to the steel plate 6 and the adhesive layer 5, which is not conducive to the bonding stability of the steel plate 6 and the adhesive layer 5. The setting of inserting the steel sheet 11 into the adhesive layer 5 can anchor the vibrating steel plate 6 and reduce the overall negative impact of vibration on the steel plate 6 and the adhesive layer 5.

[0036] Optionally, in step S4, the resistance measuring device applies the same voltage, such as a 5V DC voltage, between every two metal bars 4. The resistance measuring device is connected to a processing and analysis terminal (e.g., a computer) to transmit the real-time resistance value data to the terminal's data analysis software.

[0037] Optionally, in step S5, the data analysis software performs scalar field visualization algorithm processing and analysis on the resistance value data, where the scalar is the resistance value. Then, with the help of image processing technology, a resistance value distribution cloud map of the adhesive layer 5 is obtained. This cloud map corresponds to the entire adhesive layer 5. In this cloud map, the position where the resistance value is less than 1Ω indicates that there is no bubble, and the position where the resistance value is greater than 8Ω indicates that there is a bubble. The scalar field visualization algorithm can also identify and locate the bubble coordinates and bubble size, which is convenient for controlling the amount of adhesive applied during repair.

[0038] In step S6, a hole is drilled in the steel plate 6 above the center of the bubble. The hole is perpendicular to and penetrates the steel plate 6. Then, a pneumatic glue injection device is used to inject glue into the drilled hole and the bubble cavity until the glue is flush with the upper surface of the steel plate 6. After the glue cures, it can naturally seal the drilled hole. After all the bubbles are repaired, step S4 is repeated. If all resistance values ​​are less than 1Ω, it means that there are no bubbles.

[0039] The data analysis software, scalar field visualization algorithms, and image processing techniques mentioned above are all existing technologies, or can be implemented using existing programming methods.

Claims

1. A method for detecting and repairing air bubbles between adhesive layers, characterized in that, include: S1: Lay an electrode mesh on a concrete base surface. The electrode mesh is composed of several metal strips or wires that are crisscrossed. S2: Apply conductive adhesive to the concrete substrate and the electrode mesh. The adhesive layer covers the electrode mesh, and the thickness of the adhesive layer is greater than the height of the electrode mesh. The ends of the metal strips or wires can extend out of the adhesive layer. S3: Cover the adhesive layer with a steel plate and apply pressure to fix it, so that the adhesive layer can cure. S4: Use a resistance measuring device to connect and measure the resistance between every two metal strips or every two metal wires; S5: Use the scalar field visualization algorithm to process and analyze the resistance data to obtain a resistance distribution cloud map of the adhesive layer; locations in the cloud map where the resistance value is greater than the threshold are bubbles. S6: After locating the bubble using the cloud map, drill a hole in the steel plate above the bubble, then inject conductive adhesive into the bubble to fill it, and at the same time fill the corresponding drilled hole in the steel plate.

2. The detection and repair method according to claim 1, characterized in that, The longitudinal section of the metal strip is T-shaped. The metal strip includes two slender strip plates, which are perpendicular to each other to form a T-shape. The vertical strip plate is used to connect the concrete base surface, and the horizontal strip plate is located inside the adhesive layer. The two metal strips, one horizontal and one vertical, are connected at their intersection to form a cross shape, while the longitudinal section of each metal strip still maintains a T-shape.

3. The detection and repair method according to claim 2, characterized in that, The adhesive layer has a skeleton mesh inside, which includes several crisscrossing skeleton rods to form a matrix grid. The grid of the skeleton mesh corresponds one-to-one with the grid of the electrode mesh, and the skeleton rods of the skeleton mesh correspond one-to-one with the metal strips of the electrode mesh. The frame rod consists of two separate protective plates, which are symmetrically arranged with the corresponding vertical strip plate as the center line. The two protective plates correspond to the two sides of the horizontal strip plate respectively.

4. The detection and repair method according to claim 3, characterized in that, The protective plate is made of rigid insulating material, which does not affect the resistance measurement of the adhesive layer between the metal strips; the upper middle part of the protective plate is curved and protrudes in the direction away from the corresponding other protective plate; the bottom of the protective plate is vertical, which facilitates connection to the concrete base surface. The upper middle part of the guard plate has a perforated slit, allowing one end of the horizontal strip to pass through the slit; the perforated slit of the guard plate is parallel to the horizontal strip, and the length of the perforated slit is less than the length of the guard plate.

5. The detection and repair method according to claim 4, characterized in that, The lower surface of the steel plate is provided with a downwardly extending fixing mesh, which consists of several steel sheets arranged in a crisscross pattern to form a matrix grid. The grid of the fixing mesh corresponds one-to-one with the grid of the electrode mesh, and the steel sheets correspond one-to-one with the metal strips. The steel sheets are vertically arranged, with their tops fixedly connected to the lower surface of the steel plate and their bottoms extending downwards to between the two guard plates of the corresponding skeleton rod. When the steel plate is bonded to the adhesive layer, the steel sheet and the corresponding metal strip are on the same vertical plane, but the bottom end of the steel sheet does not contact the metal strip to avoid the metal strip from electrically connecting to the steel plate.

6. The detection and repair method according to claim 1, characterized in that, In step S1, the concrete base surface is a horizontal and flat surface. When the electrode mesh is composed of metal wires, the electrode mesh is first flattened. After the concrete base surface is completely cured, the electrode mesh is laid flat on the upper surface of the concrete base surface, so that the lower surface of the electrode mesh is in uniform contact with the upper surface of the concrete base surface, which facilitates the uniform application of adhesive in step S2.

7. The detection and repair method according to claim 4, characterized in that, In step S1, the concrete base is a horizontal and flat surface. When the electrode mesh is composed of T-shaped metal strips, before the concrete base is completely cured, the various protective plates of the skeleton mesh are first inserted and installed with the corresponding metal strips, and the corresponding hollow gaps are passed through the two sides of the horizontal strip plate respectively. Then, the bottom of each vertical strip plate and the vertical bottom of each guard plate are embedded into the upper surface of the concrete base until the concrete base is completely cured, and the bottom of the electrode mesh and the skeleton mesh are fixed to the concrete base.

8. The detection and repair method according to claim 5, characterized in that, In step S3, the steel sheet below the steel plate is inserted into the corresponding skeleton rod, and the colloid inside the skeleton rod covers the steel sheet, with the bottom end of the steel sheet not contacting the corresponding horizontal strip plate below.

9. The detection and repair method according to claim 1, characterized in that, In step S6, a hole is drilled in the steel plate above the center of the bubble. The hole is perpendicular to the steel plate and penetrates through it. Then, the adhesive is injected into the hole and the bubble cavity using a pneumatic adhesive injection device until the adhesive is flush with the upper surface of the steel plate. After the adhesive has cured, it can naturally seal the hole. After all bubbles have been repaired, repeat step S4. If all resistance values ​​are below 1Ω, it means there are no bubbles.

Images