A method for evaluating the interfacial bonding state of an asphalt pavement layer and a related apparatus

Abstract

The application discloses a method for evaluating the interlayer bonding state of an asphalt pavement and related equipment, and belongs to the technical field of road engineering detection. First, road information is obtained in a nondestructive manner through a ground-penetrating radar, and then an evaluation index of the interlayer bonding state of the road is obtained through radar data. In addition, in the case that the thickness of the poor interlayer bonding is very small, the influence of electromagnetic wave interference coherence on the evaluation index is considered, an auxiliary evaluation index is proposed to comprehensively evaluate the interlayer bonding state, and the accuracy of the evaluation of the interlayer bonding state of the asphalt pavement is improved through the combination of the two indexes.

Description

Technical Field

[0001] This invention belongs to the field of road engineering testing technology, specifically a method and related equipment for evaluating the interlayer bonding state of asphalt pavement. Background Technology

[0002] The bonding condition between pavement layers directly affects the integrity and performance of the pavement structure. Poor bonding prevents the pavement layers from working together effectively, leading to uneven stress distribution and a significant decrease in load-bearing capacity. This accelerates fatigue damage, causing cracks, rutting, and other defects, reducing driving comfort and safety, shortening pavement lifespan, and increasing maintenance costs. Furthermore, poor bonding allows moisture penetration, accelerating structural damage under freeze-thaw cycles.

[0003] Currently, the evaluation of interlayer bond condition in road systems mainly relies on traditional testing methods such as core drilling, peel testing, pull-out testing, and shear testing. These methods evaluate the interlayer bond condition by obtaining interlayer mechanical parameters (interlayer shear strength, interlayer tensile strength, etc.). These traditional methods have significant limitations: they damage the road surface; they have low testing efficiency and limited scope; the results are easily affected by the environment; and they cannot obtain continuous interlayer bond condition information. Summary of the Invention

[0004] This invention provides a method and related equipment for evaluating the interlayer bonding state of asphalt pavement, which solves the problems of traditional testing methods causing damage to the pavement, low testing efficiency, limited range, results being easily affected by the environment, and inability to obtain continuous interlayer state information.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for evaluating the interlayer bond state of asphalt pavement includes:

[0007] Radar data used to collect information about asphalt pavement;

[0008] Preprocess the collected radar data;

[0009] Based on the preprocessed radar data, evaluation indicators of the interlayer bonding state of the road are obtained.

[0010] To obtain the relationship between the two-way travel time of the upper and lower interfaces between layers of asphalt pavement and one cycle of the detected electromagnetic wave;

[0011] The interlayer bonding state of asphalt pavement is evaluated by combining the evaluation index of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the interlayer of asphalt pavement and one cycle of the detection electromagnetic wave.

[0012] Among them, sheet metal was placed at the starting point of the asphalt road surface collection.

[0013] Preferably, when collecting radar data on asphalt pavement information, the pavement should be dry before ground-penetrating radar detection is performed on the asphalt pavement section to be inspected to collect road information.

[0014] Preferably, the preprocessing step for the acquired radar data specifically includes:

[0015] The collected radar data is subjected to the following steps in sequence: interference suppression, inverse short-time Fourier transform, background filtering, data gain, and time zero-point correction.

[0016] Preferably, the evaluation index for the interlayer bonding state of the road, based on the preprocessed radar data, is as follows:

[0017] Based on the total reflection peak at the starting point of the iron plate in the data, the first peak value of the electromagnetic wave entering the road surface and the peak value of the reflection at the interlayer interface are detected at each detection point on the road. Combined with the A-scan waveform characteristics of each detection point, the evaluation index of the interlayer bonding state of the road is obtained.

[0018] Preferably, the calculation formula for the evaluation index is as follows:

[0019]

[0020] in The peak value of the total internal reflection wave at the starting point of the iron plate. The first peak value of the wave entering the road surface at each detection point. For each detection point, the peak value between layers, The distance of the target interface from the ground. This is a depth correction function.

[0021] Preferably, the method for obtaining the depth correction function is as follows:

[0022] Marshall specimens at different heights were fitted with an iron sheet buried in the soil. Radar was used to collect echo data of the iron sheet at different heights, and a depth correction function was fitted.

[0023] Preferably, the evaluation of the interlayer bonding state of asphalt pavement is carried out by combining evaluation indicators of the interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the asphalt pavement and one cycle of the detection electromagnetic wave. Specifically, the evaluation of the interlayer bonding state of asphalt pavement is as follows:

[0024] when Evaluation indicators When the value is ≤a, the interlayer adhesion is good. Evaluation index When it is a, it is generally interlayer bonding;

[0025] when This is defined as poor interlayer adhesion.

[0026] when Furthermore, the presence of two peaks at this location indicates severe interlayer bonding problems.

[0027] in, It serves as an evaluation index for the bonding state between road layers. To detect the time of one cycle of an electromagnetic wave, Let 'a' be the two-way travel time between the upper and lower interfaces of the layers. In 0- The interlayer bonding is good and the limit value is normal.

[0028] A system for evaluating the interlayer bonding state of asphalt pavement.

[0029] Acquisition module: Radar data used to collect information about asphalt pavement;

[0030] Preprocessing module: Used to preprocess the acquired radar data;

[0031] First acquisition module: used to acquire evaluation indicators of the interlayer bonding state of the road based on preprocessed radar data;

[0032] The second acquisition module is used to acquire the relationship between the two-way travel time of the upper and lower interfaces between the layers of the asphalt pavement and one cycle of the detected electromagnetic wave.

[0033] Evaluation module: Used to evaluate the interlayer bonding state of asphalt pavement by combining evaluation indicators of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of asphalt pavement and one cycle of the detection electromagnetic wave.

[0034] Among them, sheet metal was placed at the starting point of the asphalt road surface collection.

[0035] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the steps of a method for evaluating the interlayer bonding state of asphalt pavement.

[0036] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of a method for evaluating the interlayer bond state of asphalt pavement.

[0037] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a method for evaluating the interlayer bonding state of asphalt pavement. First, road information is obtained non-destructively using bottom-penetrating radar. Then, evaluation indicators of the interlayer bonding state of the road are obtained through radar data. Considering the influence of electromagnetic wave interference coherence on the evaluation indicators when the interlayer thickness is very small, auxiliary evaluation indicators are proposed to comprehensively evaluate the interlayer bonding state. The combination of dual indicators improves the accuracy of evaluating the interlayer bonding state of asphalt pavement.

[0038] Furthermore, the evaluation index is based on the principle of reflection coefficient and the propagation process of electromagnetic waves in asphalt pavement. It comprehensively considers the influence of different electromagnetic wave emission intensities and different asphalt pavement material properties, making the evaluation index more universal. Compared with existing technologies, this evaluation index can more accurately reflect the magnitude of the reflection coefficient at the interlayer interface, thus more accurately reflecting the difference in dielectric constant between the upper and lower layers at the interlayer interface.

[0039] A depth correction function is proposed, which effectively solves the problem of the target interface causing problems for the index at different depths. This leads to several issues. By modifying the function, the evaluation results become comparable under different depth conditions, thus improving the applicability of the evaluation method. Attached Figure Description

[0040] Figure 1 This is a flowchart of a method for evaluating the interlayer bonding state of asphalt pavement according to the present invention;

[0041] Figure 2 This is a system block diagram for evaluating the interlayer bonding state of asphalt pavement according to the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the present invention provides a method for evaluating the interlayer bonding state of asphalt pavement, comprising:

[0047] S101 collects radar data on asphalt pavement road information;

[0048] S102 preprocesses the collected radar data;

[0049] S103 obtains evaluation indicators of the interlayer bonding state of the road based on preprocessed radar data;

[0050] S104 obtains the relationship between the two-way travel time of the upper and lower interfaces between the layers of asphalt pavement and one cycle of the detected electromagnetic wave.

[0051] S105 evaluates the interlayer bonding state of asphalt pavement by combining the evaluation index of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the interlayer of asphalt pavement and one cycle of the detection electromagnetic wave.

[0052] Among them, sheet metal was placed at the starting point of the asphalt road surface collection.

[0053] The detailed steps are as follows:

[0054] Step 1: On-site data collection

[0055] Before data collection, ensure that the road section to be tested is dry and that there has been no rain in the area in the past few days.

[0056] At the starting point of the test section, a metal plate is placed to mark the starting point in order to obtain the total internal reflection wave from the antenna. Then, ground-penetrating radar is used to detect the asphalt pavement section to collect road information.

[0057] Step 2: Data Preprocessing

[0058] On the radar data processing software, the acquired raw data undergoes a series of steps including interference suppression, inverse short-time Fourier transform, background filtering, data gain, and time zero-point correction to eliminate clutter and ensure the standardization and validity of the data.

[0059] Step 3: Calculation of evaluation indicators

[0060] Export the processed radar data from the radar data processing software. Record the total internal reflection peak at the starting point (the iron plate) as A0. Record the first peak value of the electromagnetic wave entering the road surface at each detection point as A1 for that point. Record the peak value of the reflection at the interlayer interface as A2 for that point. Calculate the evaluation index r for that point based on these echo data. (Time difference between the upper and lower interfaces of the layers), and at the same time, combined with the A-scan waveform characteristics of each detection point, the bonding state between the road surface layers is comprehensively evaluated.

[0061] Core evaluation indicators The calculation formula is as follows:

[0062]

[0063] in The peak value of the total internal reflection wave at the starting point of the iron plate. The first peak value of the wave entering the road surface at each detection point. For each detection point, the peak value between layers, The distance of the target interface from the ground. This is a depth correction function.

[0064] The theoretical derivation process of this evaluation index is as follows:

[0065] In actual testing, to ensure a safe distance between the equipment and the ground, the antenna is usually placed at a certain height. Let's assume the antenna is at a certain height above the ground. The interlayer locations that need to be inspected are on the road surface. The depth. Because the dielectric constant of asphalt mixtures does not fluctuate much under dry conditions, the asphalt surface layer is assumed to be a homogeneous medium, and the attenuation constant in the asphalt mixture is assumed to be... The attenuation constant in air is Considering electromagnetic waves in The attenuation within the upper air layer, through energy conservation, allows us to obtain the incident wave energy of the electromagnetic wave entering the road surface as follows:

[0066]

[0067] Then passed When the attenuation in the thick asphalt mixture reaches the target interface, the energy of the electromagnetic wave is:

[0068]

[0069] Assume the reflectivity of the target interface is After reflection from the target interface, the electromagnetic wave energy is:

[0070]

[0071] Then the electromagnetic waves passed through The attenuation within the asphalt mixture reaches the ground and then is transmitted back out. Let's assume the transmittance coefficient of the asphalt mixture to air is... The energy of the electromagnetic waves transmitted to the ground at this time is:

[0072]

[0073] Final Process The attenuation in the air due to distance becomes what the radar receiver receives. In other words:

[0074]

[0075] Here we can calculate the reflection coefficient at the interlayer location based on the echo data we collected:

[0076]

[0077] Considering that actual radar data undergoes gain processing during the processing stage, let's assume its gain function is... ,in Let be the propagation time of the electromagnetic wave from the moment it enters the road surface. Then, the actual reflection coefficient is:

[0078]

[0079] Since we assume the asphalt surface layer is a homogeneous medium, we can convert the gain function to... , For depth, Let be the velocity of the electromagnetic wave within the asphalt mixture, then the reflection coefficient here is:

[0080]

[0081] Because the dielectric constant of asphalt mixtures is relatively stable under dry conditions, the refractive index here... and It can also be approximated as a constant, so the latter part of the above formula can be approximated as a constant. The relevant functions are simplified to Therefore, this index directly reflects the magnitude of the reflection coefficient at the defective interlayer interface, which in turn reflects the difference in dielectric constant between the target interfaces. A larger value indicates a greater difference in dielectric constant between the interlayer and the asphalt layer, and thus a worse interlayer bonding state at that location.

[0082]

[0083] Evaluation index correction function This is used to eliminate the influence of depth on the evaluation results, ensuring that the evaluation metrics are applicable to any depth. This is because The value is not only affected by the reflection coefficient of the target interface, but also by the combined effects of electromagnetic wave attenuation and data processing gain due to changes in interface depth, leading to variations in the measured value. This function needs to be obtained through indoor or field experiments. Specifically, a Marshall specimen at different heights is placed with an iron plate buried in the soil below it. Radar scanning is used to collect the echo data of the iron plate at different heights, and the function is then fitted. .

[0084] Step 4: Evaluation Indicators and waveform characteristics

[0085] Since the thickness of actual interlayer bonding defects is usually quite small, we have observed that when the vertical spacing between the defects is very small, electromagnetic waves will exhibit interference coherence during propagation between the layers. The index is not only related to the difference in dielectric constant between the upper and lower layers, but is also affected by the thickness of the interlayer defect. Therefore, another evaluation index is proposed here. This refers to the two-way travel time at the upper and lower interfaces between layers, which also corresponds to the distance between the two negative peaks in the waveform, ensuring the accuracy of the evaluation method. The following uses... The value is one period of the radar detection center frequency, and the calculation formula is as follows:

[0086]

[0087] in To detect the time of one cycle of an electromagnetic wave, To detect the center frequency of electromagnetic waves.

[0088] (1) When

[0089] As the thickness of the thin layer increases, the path difference increases, and the superimposed reflected waves gradually produce a certain phase difference, but... Before reaching half a cycle, coherent interferometry still dominates, and the echo data increases, affecting evaluation indicators. Increase, and The interlayer thickness has not yet reached the critical overlap frequency, so this interval... The sum of the waves does not increase with increasing thickness; it remains stable. Nearby. At this point, the interlayer waveform characteristic has a distinct peak, and the peak value increases with the increase of the interlayer defect thickness. However, the distance between the two negative peaks corresponding to the upper and lower interfaces is also... It won't change.

[0090] (2) When

[0091] As the thickness of the air layer continues to increase ( When the thickness exceeds half a period but is less than one period, the phase difference between reflected waves further increases; as the thickness increases, the path difference gradually approaches one wavelength, at which point the phases of the reflected waves gradually tend to superimpose again. However, due to the periodic change in phase, some reflected signals will undergo destructive interference. In this stage, the evaluation index... Instead, it decreases with increasing thickness, and this value decreases to a minimum when the upper and lower layers separate, because phase interference causes partial cancellation of reflected signal energy. The value increases with increasing thickness. At this point, the interlayer waveform characteristic still has a distinct peak, and as the thickness of the interlayer defect increases, the value of the peak decreases, while the distance between the two negative peaks increases.

[0092] (3) When

[0093] Evaluation indicators Initially, there will be a slight upward trend, which will eventually stabilize as the thickness increases. At this point, you can see the obvious single peak gradually transform into a double peak until the interface completely separates.

[0094] Step 5: Evaluation System

[0095] Interlayer defects can manifest in various complex ways, but good interlayer conditions are relatively simple and straightforward: there are no impurities between the layers, or the layers only contain substances related to interlayer bonding. The relevant indicators are as follows: and The value of a is less than 'a'. The value of 'a' is related to the testing equipment and data processing method. The method to obtain the value of 'a' for your own equipment can be obtained through indoor testing and on-site verification. That is, by measuring a certain number of core samples with good and poor interlayer conditions in indoor testing to determine the value of 'a', or by selecting a certain number of points located at the boundary between good and poor interlayer conditions based on waveform characteristics in actual test road section data to verify and determine the value of 'a'.

[0096] Based on the two evaluation indicators mentioned above, the following evaluation system is proposed:

[0097] The collected data will be processed according to... The size of the data is divided into three categories according to the following intervals.

[0098] when

[0099] Evaluation indicators When the value is ≤a, the interlayer adhesion is good. Evaluation index When >a, it is generally interlayer bonding.

[0100] when

[0101] Defined as poor interlayer adhesion

[0102] when Furthermore, there are two peaks at this location:

[0103] Directly defined as severe interlayer adhesion problems

[0104] like Figure 2 As shown, the present invention provides a system for evaluating the interlayer bonding state of asphalt pavement, comprising:

[0105] Acquisition module: Radar data used to collect information about asphalt pavement;

[0106] Preprocessing module: Used to preprocess the acquired radar data;

[0107] First acquisition module: used to acquire evaluation indicators of the interlayer bonding state of the road based on preprocessed radar data;

[0108] The second acquisition module is used to acquire the relationship between the two-way travel time of the upper and lower interfaces between the layers of the asphalt pavement and one cycle of the detected electromagnetic wave.

[0109] Evaluation module: Used to evaluate the interlayer bonding state of asphalt pavement by combining evaluation indicators of road interlayer bonding state with the relationship between the two-way travel time of the upper and lower interfaces of the asphalt pavement interlayers and one cycle of the detection electromagnetic wave.

[0110] Among them, sheet metal was placed at the starting point of the asphalt road surface collection.

[0111] An embodiment of the present invention provides a terminal device. This terminal device includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps in the various method embodiments described above. Alternatively, when the processor executes the computer program, it implements the functions of each module / unit in the various device embodiments described above.

[0112] The computer program can be divided into one or more modules / units, which are stored in the memory and executed by the processor to complete the present invention.

[0113] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0114] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0115] The memory can be used to store the computer program and / or module. The processor implements various functions of the terminal device by running or executing the computer program and / or module stored in the memory and calling the data stored in the memory.

[0116] If the modules / units integrated into the terminal device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0117] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. A method for evaluating the interlayer bonding state of asphalt pavement, characterized in that, include: Radar data used to collect information about asphalt pavement; Preprocess the collected radar data; Based on the preprocessed radar data, evaluation indicators of the interlayer bonding state of the road are obtained. To obtain the relationship between the two-way travel time of the upper and lower interfaces between layers of asphalt pavement and one cycle of the detected electromagnetic wave; The interlayer bonding state of asphalt pavement is evaluated by combining the evaluation index of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the interlayer of asphalt pavement and one cycle of the detection electromagnetic wave. Among them, sheet metal was placed at the starting point of the asphalt road surface collection; Based on the preprocessed radar data, the evaluation indicators for the interlayer bonding state of the road are as follows: Based on the total reflection peak at the starting point of the iron plate in the data, the first peak value of the electromagnetic wave entering the road surface and the peak value of the reflection at the interlayer interface are detected at each detection point on the road. Combined with the A-scan waveform characteristics of each detection point, the evaluation index of the interlayer bonding state of the road is obtained. The formula for calculating the evaluation indicators is: in The peak value of the total internal reflection wave at the starting point of the iron plate. The first peak value of the wave entering the road surface at each detection point. For each detection point, the peak value between layers, The distance of the target interface from the ground. This is a depth correction function; The method for obtaining the depth correction function is as follows: Marshall specimens at different heights were buried in the soil with an iron sheet underneath them. Radar was used to collect echo data of the iron sheet at different heights, and a depth correction function was fitted. The evaluation of the interlayer bonding state of asphalt pavement is specifically based on the evaluation indicators of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the interlayers and one cycle of the detection electromagnetic wave: when Evaluation indicators When the value is ≤a, the interlayer adhesion is good. Evaluation index When it is a, it is generally interlayer bonding; when This is defined as poor interlayer adhesion. when Furthermore, the presence of two peaks at the test location indicates severe interlayer adhesion problems. in, It serves as an evaluation index for the bonding state between road layers. To detect the time of one cycle of an electromagnetic wave, Let 'a' be the two-way travel time between the upper and lower interfaces of the layers. In 0- The interlayer bonding is good and the limit value is normal.

2. The method for evaluating the interlayer bonding state of asphalt pavement according to claim 1, characterized in that, When collecting radar data on asphalt pavement, ensure the pavement is dry before conducting ground-penetrating radar detection on the asphalt pavement section to be inspected to collect road information.

3. The method for evaluating the interlayer bonding state of asphalt pavement according to claim 1, characterized in that, The specific steps for preprocessing the collected radar data are as follows: The collected radar data is subjected to the following steps in sequence: interference suppression, inverse short-time Fourier transform, background filtering, data gain, and time zero-point correction.

4. A system for evaluating the interlayer bonding state of asphalt pavement, characterized in that, include: Acquisition module: Radar data used to collect information about asphalt pavement; Preprocessing module: Used to preprocess the acquired radar data; First acquisition module: used to acquire evaluation indicators of the interlayer bonding state of the road based on preprocessed radar data; The second acquisition module is used to acquire the relationship between the two-way travel time of the upper and lower interfaces between the layers of the asphalt pavement and one cycle of the detected electromagnetic wave. Evaluation module: Used to evaluate the interlayer bonding state of asphalt pavement by combining evaluation indicators of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of asphalt pavement and one cycle of the detection electromagnetic wave. Among them, sheet metal was placed at the starting point of the asphalt road surface collection; Based on the preprocessed radar data, the evaluation indicators for the interlayer bonding state of the road are as follows: Based on the total reflection peak at the starting point of the iron plate in the data, the first peak value of the electromagnetic wave entering the road surface and the peak value of the reflection at the interlayer interface are detected at each detection point on the road. Combined with the A-scan waveform characteristics of each detection point, the evaluation index of the interlayer bonding state of the road is obtained. The formula for calculating the evaluation indicators is: in The peak value of the total internal reflection wave at the starting point of the iron plate. The first peak value of the wave entering the road surface at each detection point. For each detection point, the peak value between layers, The distance of the target interface from the ground. This is a depth correction function; The method for obtaining the depth correction function is as follows: Marshall specimens at different heights were buried in the soil with an iron sheet underneath them. Radar was used to collect echo data of the iron sheet at different heights, and a depth correction function was fitted. The evaluation of the interlayer bonding state of asphalt pavement is specifically based on the evaluation indicators of road interlayer bonding state and the relationship between the two-way travel time of the upper and lower interfaces of the interlayers and one cycle of the detection electromagnetic wave: when Evaluation indicators When the value is ≤a, the interlayer adhesion is good. Evaluation index When it is a, it is generally interlayer bonding; when This is defined as poor interlayer adhesion. when Furthermore, the presence of two peaks at the test location indicates severe interlayer adhesion problems. in, It serves as an evaluation index for the bonding state between road layers. To detect the time of one cycle of an electromagnetic wave, Let 'a' be the two-way travel time between the upper and lower interfaces of the layers. In 0- The interlayer bonding is good and the limit value is normal.

5. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for evaluating the interlayer bonding state of asphalt pavement as described in any one of claims 1 to 3.

6. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for evaluating the interlayer bonding state of asphalt pavement as described in any one of claims 1 to 3.

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