Method, device and system for detecting water seepage height of concrete impermeability test

Abstract

The invention relates to the technical field of concrete impermeability detection, in particular to a method, device and system for detecting the water seepage height of a concrete impermeability test. According to the method for detecting the water seepage height of the concrete impermeability test, the water seepage height test is carried out by utilizing the characteristic that the capacitance value can change along with the water seepage height when the concrete water seepage height changes and serves as an interpolar medium of a capacitor. Through the implementation of the device, two tests of a step-by-step pressurization method and a water seepage height method can be completed within one experiment time, full-automatic detection can be completely realized, human intervention is not needed, the test time of the water seepage height method is greatly saved, and the working efficiency and the detection data quality are improved. The defects that in the prior art, a water seepage height method is complex in operation and low in efficiency are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of concrete anti-seepage testing, in particular to a method, a device and a system for testing the water seepage height of a concrete anti-seepage test. Background Art

[0002] Concrete anti-seepage test methods mainly include water seepage height method and step-by-step pressure method, which are used to detect the water penetration resistance of ordinary concrete.

[0003] The preparation of the test specimens of the water seepage height method must follow specific standards, such as the maximum nominal particle size of aggregates, the size of the test specimens, and the flatness of the pressure-bearing surface. The test specimens are required to be cured under standard curing conditions until they reach the specified age. Before the test, the test specimens are sealed, and the sides of the test specimens need to be sealed with melted paraffin and other materials to ensure the accuracy of the test. The test process starts from 0.1MPa, and the water pressure is increased by 0.1MPa every 8 hours until 3 of the 6 test specimens show water seepage, and the test is terminated. The test specimens taken out from the impermeability tester are placed on the press, and a steel pad with a diameter of 6m should be placed at the center of the upper and lower ends of the test specimen along the diameter direction, and they should be ensured to be in the same vertical plane. Then start the press and split the test specimen into two halves along the longitudinal section. After the test specimen is split, the water mark should be drawn with a waterproof pen. Place the trapezoidal plate on the split surface of the specimen, and use a steel ruler to measure the water seepage height at 10 measuring points at equal intervals along the water mark. The reading should be accurate to 1mm. If a measuring point is blocked by aggregate during reading, the arithmetic average of the water seepage heights near both ends of the aggregate can be used as the water seepage height of the measuring point.

[0004] The step-by-step pressurization method is also used to determine the water penetration resistance of ordinary concrete. The specimen preparation, curing and sealing treatment are the same as those of the water seepage height method. The test process starts with low water pressure and gradually increases the water pressure. Each level of pressure is maintained for a certain time until the predetermined pressure is reached or obvious water seepage is observed. The water seepage at each level of pressure and the number of specimens without water seepage are recorded to calculate the concrete's water seepage resistance grade.

[0005] In general, both the seepage height method and the step-by-step pressurization method can evaluate the anti-seepage performance of concrete. After the seepage height method test is completed, the test piece is split into two halves along the longitudinal section using a press, and the seepage height values ​​of 10 measuring points are measured at equal intervals along the water mark using a steel ruler. This can accurately determine the seepage situation of each test piece, which is more reliable than the step-by-step pressurization method.

[0006] However, after the water seepage height test is completed, the specimen is split into two halves along the longitudinal section using a press and then the water seepage situation is evaluated. This is a time-consuming and labor-intensive task, which to a certain extent restricts the large-scale promotion of this method. Summary of the invention

[0007] In order to overcome the defects of the water seepage height method in the above-mentioned prior art, such as complex operation and low efficiency, the present invention proposes a method for detecting the water seepage height of concrete anti-permeability test, which realizes the rapid detection of water seepage height, avoids the cumbersome process of using a press to split the test piece for measurement, effectively saves time and reduces costs.

[0008] The present invention proposes a method for detecting the water seepage height of concrete anti-seepage test. The concrete specimen and the water seepage inside it are regarded as the inter-electrode medium of the capacitor. A capacitive sensor for clamping the concrete specimen is arranged outside the concrete specimen. The capacitive sensor is insulated from the concrete specimen. Then, the water seepage height is calculated according to the capacitance value.

[0009] Preferably, it is suitable for a flat plate capacitor, and during the test, the flat plate capacitor is horizontally arranged up and down to clamp the concrete test piece; The method firstly combines the calibration sample to fit the relationship between the capacitance value and the water seepage height of the concrete specimen, records the water seepage height calculated by combining the known capacitance value and the relationship as the water seepage height fitting value, and records the water seepage height calculated by combining the known capacitance value and the theoretical formula as the water seepage height theoretical value; constructs a ratio change curve of the water seepage height fitting value and the water seepage height theoretical value under different capacitance values ​​on the calibration sample; Then, a flat plate capacitor is used to detect the concrete specimen to obtain the measured capacitance value, the theoretical value of the water seepage height of the concrete specimen to be tested is calculated, and the ratio change curve is found to obtain the target ratio corresponding to the measured capacitance value, and the product of the target ratio and the theoretical value of the water seepage height of the concrete specimen to be tested is calculated as the water seepage height detection result of the concrete specimen to be tested.

[0010] Preferably, the relationship is expressed as: ; where a and b are the parameters to be fitted, C is the capacitance value, h is the water seepage height.

[0011] Preferably, the theoretical formula is expressed as: ; in, is the theoretical value of water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the plate area; C is the capacitance value.

[0012] Preferably, an enveloping capacitor is used to detect the capacitance value of the concrete specimen, and two clamping plates of the enveloping capacitor are arranged symmetrically about the concrete specimen and clamp the concrete specimen; a water seepage height detection model suitable for the enveloping capacitor is: ; in, is the water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the measured capacitance value; is the opening angle of the encircling capacitor; is the correction factor.

[0013] Preferably, the correction coefficient is obtained by fitting on a calibration sample.

[0014] Preferably, the opening angle The value range is [85°,89.5°].

[0015] The present invention proposes a device for detecting water seepage height in a concrete anti-seepage test, comprising a capacitor structure, a capacitance testing instrument and a computer; a water seepage height detection model corresponding to the capacitor structure is stored in the computer, the capacitor structure uses a concrete test piece as a medium, the capacitance testing instrument is used to detect the capacitance value of the capacitor structure, the computer obtains the capacitance value measured by the capacitance testing instrument and substitutes it into the water seepage height detection model to calculate the water seepage height; When the capacitor structure is a flat plate capacitor consisting of two plates, the water seepage height detection model is: ; in, is the water seepage height; Substitute the detection capacitance value into the theoretical model to obtain the theoretical value of water seepage height; C - f s To characterize the ratio of the fitted value to the theoretical value of the water seepage height of concrete specimens under different capacitance values f s Correction function of the relationship; f s,C Represents the correction function C - f s The ratio of the upper detection capacitance value f s ; When the capacitor structure is an enveloping capacitor consisting of two clamping plates, the water seepage height detection model is: ; in, is the water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the measured capacitance value; is the opening angle of the encircling capacitor; is the correction factor.

[0016] The present invention proposes a system for detecting the water seepage height of a concrete anti-permeability test, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is connected to the memory, and the processor is used to execute the computer program to implement the method for detecting the water seepage height of a concrete anti-permeability test.

[0017] The present invention provides a storage medium storing a computer program, which is used to implement the method for detecting the water seepage height of a concrete anti-permeability test when being executed.

[0018] The advantages of the present invention are: The method proposed in this invention is a method for detecting the water seepage height of concrete anti-seepage test. When the concrete water seepage height changes, it acts as the inter-electrode medium of the capacitor, and the capacitance value changes with the water seepage height to test the water seepage height. The implementation of the present invention will enable the step-by-step pressurization method and the water seepage height method to be completed in one experiment, and can fully realize full-automatic detection without human intervention, which will greatly save the test time of the water seepage height method and improve work efficiency and detection data quality.

[0019] The present invention utilizes the characteristic that the concrete test piece can be clamped by the capacitor during the concrete impermeability test to perform capacitance test, which is convenient and quick, does not require the concrete to be split for observation, improves the efficiency of concrete detection, and reduces the operation cost and difficulty.

[0020] The present invention combines the characteristics of concrete specimens that are usually truncated cone-shaped to propose two capacitor structures and capacitance measurement methods, namely, flat-plate capacitors and encircling capacitors, and proposes corresponding water seepage height detection models for different capacitance measurement methods, thereby providing a variety of methods for capacitance detection of concrete specimens, which is convenient for selection according to the environment; at the same time, it is also convenient to verify the detection results through different detection methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flow chart of a method for detecting water seepage height in a concrete anti-seepage test; Figure 2 is a schematic diagram of a flat plate capacitor; Figure 3 It is a schematic diagram of the detection state of the flat plate capacitor; Figure 4 It is a schematic diagram of the detection status of the encircling capacitor; Figure 5 To show the angle; Figure 6 Testing site for plate capacitors; Figure 7It is shown as the fitting function; Figure 8 The detection error shown in Table 2 in Example 1 is shown; Fig. 9 The detection error shown in Table 3 in Example 1 is shown; Fig.10 This is the test site for the ring-type capacitor; Fig.11 The detection error shown in Table 4 in Example 2 is shown; Fig.12 The detection error shown in Table 5 in Example 2 is shown; Fig.13 The detection error shown in Table 6 in Example 2 is displayed. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1 The present invention regards the concrete specimen and the water seepage inside it as the inter-electrode medium of the capacitor, and arranges a special capacitance sensor outside the concrete specimen. When the water seepage height inside the concrete changes, the dielectric constant of the medium between the capacitor electrodes changes, resulting in a change in the capacitance value. After testing, it was found that the change in the capacitance value and the water seepage height show a certain linear change law. Therefore, the water seepage height of the concrete anti-permeability test can be quickly achieved through the scheme of the present invention, avoiding the cumbersome process of using a press to split the specimen for measurement, effectively saving time and reducing costs.

[0024] The present invention provides two capacitor structures.

[0025] The first capacitor structure is composed of plates 1 arranged in parallel with each other, which is referred to as a flat plate capacitor. Figure 3 shown.

[0026] The plate capacitor is a basic and important electronic component, widely used in various circuits. C Several key parameters involved include: relative dielectric constant of inter-electrode insulating medium e ε r , vacuum dielectric constant ε 0. Plate area S And the plate spacing d , please refer to Figure 2; These parameters together determine the capacitance of the capacitor, that is, its ability to store charge. The calculation formula for a flat plate capacitor is: ; From the above formula, we can see that the capacitance of the capacitor is mainly affected by the following factors: 1. Different types of insulating media (such as air, mica, glass, etc.) will affect the dielectric constant; 2. The area of ​​the upper and lower plates of the capacitor; 3. The distance between the upper and lower plates of the capacitor.

[0027] When using a flat plate capacitor to detect the water seepage height of a concrete specimen, the two plates 1 of the flat plate capacitor are arranged up and down on the two end surfaces of the concrete specimen, so that the two plates 1 are arranged horizontally and clamp the concrete specimen 2 up and down. The results are as follows: Figure 3 It is worth noting that the concrete specimen 2 is insulated from the two slabs 1 .

[0028] In this way, the plate area is fixed, and the distance between the plates is the height of the concrete specimen. When water penetrates into the concrete specimen, the comprehensive dielectric constant of the inter-electrode medium is changed. The higher the water penetration height, the greater the water content, the greater the comprehensive dielectric constant of the inter-electrode medium, and the greater the capacitance value of the capacitor. On the contrary, the lower the water penetration height, the smaller the water content, and the smaller the comprehensive dielectric constant of the inter-electrode medium.

[0029] When a flat capacitor is used for water seepage height testing, the water seepage height can be calculated using the water seepage height detection model shown in the following formula (1): ; in, is the water seepage height; is the dielectric constant of permeable concrete, is the dielectric constant of dry concrete; is the height of the concrete specimen; The capacitance value measured for the flat plate capacitor; is the plate area; C - f s It is a correction function that characterizes the ratio between the fitted value and the theoretical value of the water seepage height of concrete specimens under different capacitance values; f s,C Indicates the capacitance value is C Get the value.

[0030] in, and Can be obtained by looking up the table.

[0031] Correction function C - fs The acquisition includes the following steps.

[0032] S11. Construct the testing environment and determine the height of the concrete specimen and the plate area of ​​the parallel capacitor ; A flat plate capacitor is used to measure the capacitance of a concrete specimen under a testing environment; two plates of the flat plate capacitor are arranged horizontally and clamp the concrete specimen up and down, and the plates are insulated from the concrete specimen; S12. Obtain the calibration sample of the concrete specimen ( h , C p ),in h is the water seepage height of the concrete specimen set during calibration, C p The water seepage height of the concrete specimen set for calibration is h The capacitance value at that time; Specifically, the concrete specimen can be firstly measured for capacitance, and then split to measure the water seepage height to obtain the calibration sample ( h , C p ); S13. Fitting water seepage height based on calibration samples h and calibration capacitance C p The relationship is used as the fitting formula for seepage height.

[0033] Specifically, in this embodiment, the water seepage height fitting formula can be set as , thereby fitting parameters a and b based on the calibration samples.

[0034] S14. Calculate the calibration capacitance according to the theoretical calculation formula C p The corresponding theoretical value of the water seepage height of the concrete specimen h s : ; in, is the theoretical value of water seepage height; is the dielectric constant of permeable concrete, is the dielectric constant of dry concrete; is the specimen height; is the plate area; S15. Obtaining correction function C - f s , that is, construct the water seepage height h Theoretical height h s Ratio f s About CapacitorsC p The correlation curve of f s = h / h s .

[0035] The second capacitor structure is an encircling capacitor composed of two clamping plates 3 as electrode plates. The encircling capacitor is arranged on the periphery of the concrete specimen, and the two clamping plates 3 clamp the concrete specimen on the left and right and are insulated from the concrete specimen; a gap is reserved between the two clamping plates 3, and the two clamping plates 3 are arranged symmetrically about the concrete specimen, such as Figure 4 As shown, the dotted line 4 represents the water level.

[0036] The second capacitor structure is equivalent to the first capacitor structure, and its influencing parameters are the same as those of the flat plate capacitor. When the water seepage height of the concrete specimen changes, the comprehensive dielectric constant of the inter-electrode medium between the capacitors changes. The higher the water seepage height, the greater the water content, the greater the comprehensive dielectric constant of the inter-electrode medium, and the greater the capacitance value of the capacitor. On the contrary, the same linear change occurs.

[0037] For cylindrical concrete specimens, the clamping plate 3 is provided with an arc surface structure attached to the circumferential surface of the concrete specimen. At this time, the water seepage height of the concrete specimen can be calculated according to the water seepage height detection model shown in the following formula (2): ; is the water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the measured capacitance value; is the opening angle of the encircling capacitor, as shown in Figure 5; is the correction coefficient, which can be obtained through sample fitting.

[0038] Specifically, the correction factor The fitting method is as follows: first obtain the calibration sample of the concrete specimen ( h , C p ), then let C = C p Substitute the calibration sample into formula (2) to fit the correction coefficient .

[0039] The above-mentioned water seepage height detection model is verified in combination with specific embodiments below.

[0040] Example 1 This embodiment uses a flat plate capacitor for measurement to verify formula (1).

[0041] In this embodiment, a simulated concrete specimen container made of acrylic material is manufactured. The internal volume of the container is consistent with the volume of the standard concrete specimen, with a height of 150 mm, a lower bottom circle diameter of 185 mm, and an upper bottom circle diameter of 175 mm.

[0042] The experimental setup is as follows: Capacitance test instrument: test level is 1V, test frequency is 1kHz; Flat plate capacitor: The plate is made of aluminum sheet with an area of ​​300×300mm and a thickness of 2mm; Medium in container: sand and water; During the experiment, the water level in the container was separated by a film to control the water level, that is, the water seepage height; the part above the film was dry sand, and the part below the film was a sand-water mixture.

[0043] The experimental protocol was carried out in 5 steps.

[0044] Step 1: There is no water in the acrylic specimen container. Use a capacitance tester to test the capacitance value at this time and record it; Step 2: The water level in the acrylic specimen container is 1 / 4 of the height. Use a capacitance tester to test the capacitance value at this time and record it; Step 3: When the water level in the acrylic specimen container reaches 2 / 4 of its built-in volume, use a capacitance tester to test the capacitance value at this time and record it; Step 4: When the water level in the acrylic specimen container reaches 3 / 4 of its built-in volume, use a capacitance tester to test the capacitance value at this time and record it; Step 5: Fill the acrylic specimen container with water, use a capacitance tester to test the capacitance value at this time and record it.

[0045] First, perform a data calibration, repeat the above experiment, record the data twice and take the average, and then perform the formula calculation. Figure 6 This is a scene picture taken at 3 / 4 water level in this implementation.

[0046] The data of this scheme was calibrated and the recorded data were shown in Table 1 below.

[0047] Table 1: Capacitance values ​​at various water levels ; The above calibration data is fitted to obtain: ; Determine the parameters The calibration data and fitting function are as follows: Figure 7 In this embodiment, formula (1-1) is used to calculate different capacitance values. Cp Theoretical water level under different capacitance values C p The ratio of the actual value of the lower water level to the theoretical value, and the correction function is constructed C - f s .

[0048] In this embodiment, two more tests were conducted to collect data, and the water level was back-calculated using the seepage height detection model shown in formula (1). The results are shown in Tables 2, 3 and Figure 8 , Fig. 9 shown.

[0049] Table 2: Statistics of back-calculation errors in the first experiment ; Table 3: Statistics of back-calculation errors in the second experiment ; It can be seen that the error in this embodiment is always less than 3%, which proves the reliability of the method. Example

[0050] This embodiment uses a ring-type capacitor for measurement to verify formula (2).

[0051] The simulated concrete specimen container and capacitance testing instrument in this embodiment are as shown in Example 1. The medium in the container is sand and water. A thin film is set at the water level to isolate water seepage, so that the part above the film is dry sand and the part below the film is a sand-water mixture.

[0052] The clamping plate 3 of the enveloping capacitor is an arc-shaped copper sheet attached to the outer periphery of the simulated concrete specimen container, with an area of ​​150×295mm and a thickness of 0.3mm. It is 89°.

[0053] In this embodiment, first obtain a calibration sample ( h , C p ) is substituted into formula (2), and the fitting correction coefficient is 8.5; then the formula (2) is verified based on the experimentally measured capacitance value.

[0054] The experimental protocol steps are as follows.

[0055] Step 1: There is no water in the acrylic specimen container. Use a capacitance tester to test the capacitance value at this time and record it; Step 2: The water level in the acrylic specimen container is 1 / 4 of the height. Use a capacitance tester to test the capacitance value at this time and record it; Step 3: When the water level in the acrylic specimen container reaches 2 / 4 of its built-in volume, use a capacitance tester to test the capacitance value at this time and record it; Step 4: When the water level in the acrylic specimen container reaches 3 / 4 of its built-in volume, use a capacitance tester to test the capacitance value at this time and record it; Step 5: Fill the acrylic specimen container with water, use a capacitance tester to test the capacitance value at this time and record it.

[0056] Repeat the above experiment, record the data three times, and calculate the water level based on the measured capacitance value combined with formula (2). The results are shown in Tables 4-6 and Figure 11-13 shown.

[0057] Table 4: Statistics of the first detection data of Example 2 ; Table 5: Second test data statistics of Example 2 ; Table 6: Statistics of the third test data of Example 2 ; From the above three test results, it can be seen that the error of the encircling capacitor test is always less than 6%; Figure 11-13 It can be seen that the linear characteristics of the encircling capacitor are more significant and better than those of the flat capacitor. It can be seen that the encircling capacitor is more suitable for practical applications.

[0058] Of course, it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0060] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A method for detecting water seepage height in a concrete anti-seepage test, characterized in that: The concrete specimen and its internal seepage water are regarded as the inter-electrode medium of the capacitor. A capacitive sensor clamping the concrete specimen is arranged outside the concrete specimen. The capacitive sensor is insulated from the concrete specimen. Then the seepage height is calculated based on the capacitance value.

2. The method for detecting water seepage height in concrete anti-seepage test according to claim 1, characterized in that: Applicable to flat plate capacitors. During testing, the flat plate capacitors are arranged horizontally up and down to clamp the concrete test piece; The method firstly combines the calibration sample to fit the relationship between the capacitance value and the water seepage height of the concrete specimen, records the water seepage height calculated by combining the known capacitance value and the relationship as the water seepage height fitting value, and records the water seepage height calculated by combining the known capacitance value and the theoretical formula as the water seepage height theoretical value; constructs a ratio change curve of the water seepage height fitting value and the water seepage height theoretical value under different capacitance values ​​on the calibration sample; Then, a flat plate capacitor is used to detect the concrete specimen to obtain the measured capacitance value, the theoretical value of the water seepage height of the concrete specimen to be tested is calculated, and the ratio change curve is found to obtain the target ratio corresponding to the measured capacitance value, and the product of the target ratio and the theoretical value of the water seepage height of the concrete specimen to be tested is calculated as the water seepage height detection result of the concrete specimen to be tested.

3. The method for detecting water seepage height in concrete anti-seepage test according to claim 2, characterized in that: The relationship is expressed as: ; where a and b are the parameters to be fitted, C is the capacitance value, h is the water seepage height.

4. The method for detecting water seepage height in concrete anti-seepage test according to claim 2, characterized in that: The theoretical formula is expressed as: ； in, is the theoretical value of water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the plate area; C is the capacitance value.

5. The method for detecting water seepage height in concrete anti-seepage test according to claim 1, characterized in that: The capacitance value of the concrete specimen is detected by an enveloping capacitor. The two clamping plates of the enveloping capacitor are arranged symmetrically about the concrete specimen and clamp the concrete specimen. The water seepage height detection model suitable for the enveloping capacitor is: ； in, is the water seepage height; is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the measured capacitance value; is the opening angle of the encircling capacitor; is the correction factor.

6. The method for detecting water seepage height in concrete anti-seepage test according to claim 5, characterized in that: The correction coefficients are obtained by fitting on the calibration samples.

7. The method for detecting water seepage height in concrete anti-seepage test according to claim 5, characterized in that: Opening angle The value range is [85°,89.5°].

8. A device for detecting water seepage height in concrete anti-seepage test, characterized in that: It includes a capacitor structure, a capacitance testing instrument and a computer; the computer stores a water seepage height detection model corresponding to the capacitor structure, the capacitor structure uses a concrete test piece as a medium, the capacitance testing instrument is used to detect the capacitance value of the capacitor structure, the computer obtains the capacitance value measured by the capacitance testing instrument and substitutes it into the water seepage height detection model to calculate the water seepage height; When the capacitor structure is a flat plate capacitor consisting of two plates, the water seepage height detection model is: ； in, is the water seepage height; Substitute the detection capacitance value into the theoretical model to obtain the theoretical value of water seepage height; C - f s To characterize the ratio of the fitted value to the theoretical value of the water seepage height of concrete specimens under different capacitance values f s Correction function of the relationship; f s,C Represents the correction function C - f s The ratio of the upper detection capacitance value f s ; When the capacitor structure is an enveloping capacitor consisting of two clamping plates, the water seepage height detection model is: ； in, is the dielectric constant of permeable concrete; is the dielectric constant of dry concrete; is the specimen height; is the measured capacitance value; is the opening angle of the encircling capacitor; is the correction factor.

9. A system for detecting water seepage height in concrete anti-seepage test, characterized in that: It comprises a memory and a processor, wherein a computer program is stored in the memory, and the processor is connected to the memory, and the processor is used to execute the computer program to implement the method for detecting the water seepage height of the concrete impermeability test as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: A computer program is stored, and when the computer program is executed, it is used to implement the method for detecting the water seepage height of the concrete impermeability test as described in any one of claims 1 to 7.

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