A complete set of methods and equipment for nondestructive testing of pit measurement parameters at the same point of earth-rockfill dam filling quality

Abstract

The present invention relates to the field of geophysical exploration and provides a complete method and apparatus for non-destructive testing of earth-rockfill dam fill quality parameters at the same point. The method comprises: acquiring radar spectra and surface images collected simultaneously in the area to be tested; obtaining measuring points in the area to be tested based on the radar spectra and surface images; and testing dam material parameters at the measuring points to determine the test results of the dam material parameters at the measuring points. The dam material parameters include the gradation of the rockfill, the density of the rockfill, and the permeability coefficient of the rockfill. In this way, by combining the surface images and radar spectra, measuring points suspected of quality hazards are selected, greatly reducing the uncertainty and missed detection caused by subjective selection of measuring points. This enables multi-parameter testing at the same measuring point, thereby more accurately determining whether the measuring point meets design specifications.

Description

[0001] This case claims the priority of a patent application with an application date of May 29, 2024, application number 2024106801011, and invention name “A complete set of methods and devices for non-destructive testing of pit measurement parameters of earth-rockfill dam filling quality at the same point”. Technical Field

[0002] The present invention relates to the field of geophysical exploration technology, in particular to a complete method and device for same-point non-destructive testing of pit measurement parameters of earth-rock dam filling quality. Background Art

[0003] Earth-rock dams are the most widely used water-retaining structures in water conservancy and hydropower projects. The types of earth-rock dams are generally divided into face dams and core dams. Its main structure is mainly composed of rockfill. During the construction of an earth-rock dam, the material site is first selected, and blasting is carried out to mine the rockfill blasting material. Then, an on-site compaction test is carried out to determine whether the dam material parameters meet the design requirements. The blasting process is then adjusted until the dam material compaction parameters meet the design requirements. During the dam construction process, the dam is built using a layer-by-layer compaction method until it is filled to the specified elevation. During the on-site compaction test and dam body filling process of the earth-rock dam, the dam material parameters of the compacted rockfill body are tested to see if they meet the design indicators, and then the compaction quality is judged. Therefore, an important part of the dam body filling quality inspection during the construction period of the earth-rock dam is the parameter inspection of the compacted dam material.

[0004] The conventional method for determining density and gradation parameters is pit testing. This involves manually digging pits at designated test points, weighing, and screening the rockfill after a specified number of vibratory roller compactions. Because the test points are randomly selected, it is difficult to effectively identify areas with dam quality risks, resulting in low detection efficiency. Furthermore, testing requires a large number of personnel, is costly, and significantly disrupts construction operations.

[0005] The conventional method for testing permeability coefficients is single-ring or double-ring water injection. This involves digging a pit and injecting water using single-ring or double-ring permeability coefficient measurement equipment. The permeability coefficient is then measured by measuring the relationship between the injection volume and time. Due to limitations in the testing method and equipment, permeability coefficient testing requires re-locating the measurement point for testing.

[0006] However, in actual testing, it is impossible to obtain the density, gradation, and permeability coefficient parameters of a single measurement point simultaneously. This makes it difficult to determine whether multiple dam material parameters such as density, gradation, and permeability coefficient at the same measurement point meet the design specifications. Summary of the Invention

[0007] The embodiment of the present invention provides a complete method and device for non-destructive testing of earth-rockfill dam filling quality pit measurement parameters at the same point, which solves the problem in the prior art that it is difficult to simultaneously obtain density, gradation and permeability coefficient parameter information at a measuring point.

[0008] An embodiment of the present invention provides a complete method for nondestructive testing of earth-rockfill dam fill quality parameters at the same point, which is applied to an image acquisition device. The image acquisition device includes a radar device and a video detection device. The video detection device is installed on a handrail of the radar device and includes:

[0009] Acquire a radar spectrum and an apparent image collected synchronously in the area to be measured, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0010] Based on the radar map and the surface image, obtaining measuring points in the area to be measured, wherein the measuring points include a rock mass concentration area and / or an overhead area;

[0011] Performing dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0012] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0013] According to a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention, the gradation of the rockfill body at the measuring point is obtained by the following method:

[0014] Based on the apparent image of the measuring point, determining the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point by an image segmentation algorithm;

[0015] Based on the radar spectrum and a standard radar spectrum corresponding to the preset internal particle group, determining the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point through an image comparison algorithm; the particle size of the preset internal particle group is larger than the particle size of the apparent particle group;

[0016] determining the gradation of the rockfill body at the measuring point based on the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point and the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point;

[0017] The standard radar spectrum is obtained by the following method:

[0018] preparing a model field, and filling each area of ​​the model field with stones of corresponding preset internal particle groups;

[0019] The model field is scanned by radar equipment, and a standard radar map corresponding to the preset internal particle group is prepared in combination with the regional positions of the stones of the preset internal particle group.

[0020] According to a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention, the density of the rockfill body at the measuring point is obtained by the following method:

[0021] determining the stiffness and parametric mass of the rockfill body at the measuring point by an added mass method;

[0022] Based on the stiffness and parametric mass of the rockfill body at the measuring point, the wet density and dry density of the rockfill body at the measuring point are determined.

[0023] According to a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention, the permeability coefficient of the rockfill body at the measuring point is obtained by the following method:

[0024] determining the porosity ratio of the rockfill body at the measuring point;

[0025] inputting the porosity ratio of the rockfill body at the measuring point and the gradation of the rockfill body at the measuring point into a permeability coefficient prediction model, and obtaining the permeability coefficient of the rockfill body at the measuring point output by the permeability coefficient prediction model;

[0026] The permeability coefficient prediction model is obtained by training a CNN convolutional neural network using permeability coefficient training data, wherein the permeability coefficient training data includes the gradation, porosity and permeability parameters of the rockfill sample;

[0027] The gradation, porosity and permeability parameters of the rockfill sample are obtained by:

[0028] Constructing a gradation curve of the on-site dam material according to the gradation of the on-site dam material;

[0029] Determining the gradation of the indoor test dam material based on a preset gradation scale and the gradation curve of the on-site dam material;

[0030] configuring indoor test dam materials based on the gradation information of the indoor dam materials and the on-site dam materials;

[0031] placing the indoor test dam material into a rigid mold and rolling and compacting it until the design index is reached, thereby obtaining a rockfill sample, and obtaining a gradation curve of the rockfill sample;

[0032] Based on the gradation curve of the rockfill sample, a three-dimensional simulation model is reconstructed using a particle flow program PFC;

[0033] Based on the three-dimensional simulation model, obtaining the gradation and porosity ratio of the rockfill sample;

[0034] The permeability parameters of the rockfill sample are tested by a constant head permeability method.

[0035] According to a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention, determining the test results of the dam material parameters at the measuring points also includes:

[0036] When the density of the rockfill body at the measuring point does not meet the preset density index requirement, pit measurement is performed on the density of the rockfill body at the measuring point.

[0037] According to a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention, determining the test results of the dam material parameters at the measuring points also includes:

[0038] When the gradation of the rockfill body at the measuring point does not meet the preset gradation index requirement, pit measurement is performed on the gradation of the rockfill body at the measuring point.

[0039] The present invention also provides a complete set of equipment for non-destructive testing of earth-rockfill dam filling quality pit measurement parameters at the same point, which is applied to an image acquisition device. The image acquisition device includes a radar device and a video detection device. The video detection device is installed on the handrail of the radar device and includes:

[0040] A first same-point nondestructive testing module is configured to obtain a radar spectrum and an apparent image collected synchronously in the test area, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0041] A second same-point non-destructive testing module is configured to obtain measurement points in the area to be tested based on the radar spectrum and the surface image, wherein the measurement points include a rock mass concentration area and / or an overhead area;

[0042] a third same-point non-destructive testing module, configured to perform dam material parameter detection on the measuring point and determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0043] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0044] An embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, it implements a complete method for non-destructive testing of pit measurement parameters of earth-rockfill dam filling quality at the same point.

[0045] An embodiment of the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for performing the same-point non-destructive testing of pit measurement parameters of earth-rockfill dam filling quality is implemented.

[0046] An embodiment of the present invention further provides a computer program product, which, when executed by a processor, implements a complete method for non-destructive testing of pit-measured parameters of earth-rockfill dam filling quality at the same point.

[0047] The present invention provides a complete method for nondestructive testing of earth-rockfill dam fill quality parameters at the same point. The method is applied to an image acquisition device, which includes a radar device and a video detection device. The video detection device is mounted on the handrail of the radar device. The method acquires radar images and surface images from the test area simultaneously. The radar images are acquired by the radar device, and the surface images are acquired by the video detection device. The radar and video detection devices acquire images at the same time. Based on the radar images and surface images, a measuring point in the test area is determined. The measuring point includes a concentrated rock mass area and / or an overhead area. Dam material parameters are then tested at the measuring point to determine the test results of the dam material parameters at the measuring point. The dam material parameters include the gradation of the rockfill mass, the density of the rockfill mass, and the permeability coefficient of the rockfill mass. The method uses the image acquisition device to select measuring points suspected of quality problems based on a table-based combination of the surface images acquired by the video detection device in the image acquisition device and the radar images acquired by the radar device. This method significantly reduces the uncertainty and missed detections caused by subjective selection of measuring points. This method enables multi-parameter testing at the same measuring point, thereby more accurately determining whether the measuring point meets design specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 is a structural diagram of an image acquisition device provided by an embodiment of the present invention;

[0050] Figure 2 This is a flow chart of a complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention;

[0051] Figure 3 1 is a schematic diagram comparing a conventional measuring point selection method provided in one embodiment of the present invention and a measuring point selection method provided in this embodiment;

[0052] Figure 4 1 is a schematic diagram of a flow chart for density measurement of a rockfill body according to an embodiment of the present invention;

[0053] Figure 5 This is a schematic structural diagram of a complete set of equipment for non-destructive testing of earth-rockfill dam filling quality parameters at the same point provided by one embodiment of the present invention;

[0054] Figure 6 It is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0056] The present invention provides a complete set of methods for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point. The complete set of methods for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point is applied to image acquisition equipment, such as Figure 1 As shown, the image acquisition device includes a radar device 10 and a video detection device 20 , and the video detection device 20 is installed on the handrail 11 of the radar device 10 .

[0057] The image acquisition device combines radar detection technology with visual inspection technology. By installing a video detection device 20 on the handrail 11 of the radar device 10, it can simultaneously capture both the apparent image of the target area and the internal radar map during detection. Specifically, while the radar device 10 is detecting, the video detection device 20 simultaneously captures the apparent image of the target area, thereby obtaining detailed information about the target area's appearance. Simultaneously, the radar device 10 also obtains a radar map of the target's interior, which contains data on the target's internal structure and characteristics.

[0058] Specifically, refer to Figure 2 As shown in the figure, the complete method for non-destructive testing of earth-rockfill dam fill quality parameters at the same point in the pit includes the following steps:

[0059] Step 101: Acquire a radar spectrum and an apparent image collected synchronously in the area to be measured, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0060] Radar equipment sends electromagnetic waves and receives reflected signals, generating a radar map that provides information about the location, size, and other characteristics of target objects (such as rocks).

[0061] Video detection devices capture visible light images, i.e., apparent images, which provide visual information of the area to be detected, such as texture and shape.

[0062] In this step, the image acquisition times of the two sensors (radar device and video detection device) are set to be the same or very close to ensure data synchronization.

[0063] Step 102: acquiring measuring points in the area to be measured based on the radar map and the surface image, wherein the measuring points include a rock mass concentration area and / or an overhead area;

[0064] The information in the radar image can be used to identify the location and range of target objects such as rocks in the interior area. At the same time, the surface image provides detailed visual information about the surface of the area to be measured.

[0065] By combining information from radar maps and surface images, measuring points in the area to be measured can be accurately determined. These measuring points may include rock-concentrated areas (i.e., places where a large number of rocks are gathered) or overhead areas (i.e., open areas with no or few objects).

[0066] In this embodiment, the area to be measured includes four types of areas: rockfill area, transition area, cushion layer and anti-seepage layer. It should be understood that different areas have different characteristics and importance, and the arrangement density of measurement points will also be different. In this embodiment, it is set that every 2000m in the rockfill area 2 Arrange at least one measuring point every 500m in the transition zone 2 Arrange at least one measuring point every 200m in the cushion layer and anti-seepage layer. 2 Arrange at least 1 measuring point.

[0067] Step 103 : Detecting dam material parameters at the measuring point to determine the detection result of the dam material parameters at the measuring point. The dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body.

[0068] In this embodiment, reference Figure 3As shown, based on the measurement points selected in this embodiment, multi-parameter detection can be achieved at the same measurement point, that is, the gradation, density and permeability coefficient of the rockfill body at the same measurement point can be tested.

[0069] The gradation of a rockfill refers to the distribution of particles of different sizes within the rockfill (or other granular material). The density of a rockfill refers to its mass per unit volume. The permeability of a rockfill is a parameter that indicates how easily fluids (such as water) can pass through the pore structure of the rockfill.

[0070] The present invention provides a complete method for nondestructive testing of earth-rockfill dam fill quality parameters at the same point. The method involves acquiring radar maps and surface images simultaneously collected within the test area. The radar maps are acquired by radar equipment, and the surface images are acquired by a video detection device, with the radar equipment and video detection device acquiring images at the same time. Based on the radar maps and surface images, measuring points within the test area are identified, including areas with concentrated rock mass and / or overhead areas. Dam material parameters are then tested at the measuring points to determine the test results for the dam material parameters at the measuring points. The dam material parameters include the gradation of the rockfill, the density of the rockfill, and the permeability coefficient of the rockfill. The present invention uses an image acquisition device to select measuring points suspected of quality hazards based on a table-based combination of surface images captured by the video detection device in the image acquisition device and radar maps captured by the radar equipment. This significantly reduces the uncertainty and missed detections caused by subjective selection of measuring points. This enables multi-parameter testing at the same measuring point, allowing for more accurate determination of whether the measuring point meets design specifications.

[0071] Based on the above embodiment, the gradation of the rockfill body at the measuring point is obtained by the following method:

[0072] Based on the apparent image of the measuring point, determining the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point by an image segmentation algorithm;

[0073] Based on the radar spectrum and a standard radar spectrum corresponding to the preset internal particle group, determining the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point through an image comparison algorithm; the particle size of the preset internal particle group is larger than the particle size of the apparent particle group;

[0074] The gradation of the rockfill body at the measuring point is determined based on the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point and the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point.

[0075] In this embodiment, an image segmentation algorithm is used to determine the mass percentage of visible particles (i.e., apparent particle groups) in the rockfill based on the apparent image at the measurement point. The image segmentation algorithm can identify different apparent particle groups in the image, calculate the number of particles in these apparent particle groups, and ultimately determine the mass percentage of the particles in each apparent particle group.

[0076] In this embodiment, the preset internal particle group refers to particles that are larger than the apparent particle group, are located inside the rockfill, and are invisible or obscured in the apparent image. To determine the mass percentage of these particles, radar images are used in this embodiment.

[0077] Specifically, by using an image comparison algorithm to compare the radar pattern at a measurement point with a standard radar pattern corresponding to a predetermined internal particle group, the particle mass percentage of the predetermined internal particle group can be estimated. Here, the standard radar pattern is a pre-acquired radar pattern template that represents the distribution of a specific particle group.

[0078] After obtaining the apparent particle size of the rockfill body at the measuring point and the particle mass content percentage of the preset internal particle size, the gradation of the rockfill body can be determined by combining these two pieces of information.

[0079] Specifically, in this embodiment, the standard radar spectrum is obtained by the following method:

[0080] preparing a model field, and filling each area of ​​the model field with stones of corresponding preset internal particle groups;

[0081] The model field is scanned by radar equipment, and a standard radar map corresponding to the preset internal particle group is prepared in combination with the regional positions of the stones of the preset internal particle group.

[0082] Here, a model field with a certain length, width and depth can be prepared according to actual needs. The model field is divided into different areas, which will be used to fill stones with different preset internal particle groups. According to the distribution of the preset internal particle groups, stones of corresponding sizes (such as 200mm, 300mm, 400mm, 600mm, 800mm) are filled into each layer of the model field. These stones will simulate the distribution of stones in actual geology. In the process of filling stones, it is also necessary to create overhead areas and stone gaps. The overhead area is the space without stones, and the stone gap is the space between the stones that is not filled with other substances.

[0083] After the model field is prepared, the model field is scanned using radar equipment, and the processed data is plotted into a standard radar map based on the regional locations of the stones in the preset internal particle groups. This standard radar map can characterize the radar response characteristic information of the stones in each preset internal particle group in the radar map.

[0084] Compared with the traditional surface image recognition method, this embodiment can effectively realize the rapid and nondestructive detection of large-size boulders on site by combining surface images with radar maps.

[0085] Based on the above embodiment, the density of the rockfill body at the measuring point is obtained by:

[0086] determining the stiffness and parametric mass of the rockfill body at the measuring point by an added mass method;

[0087] The wet density and dry density of the rockfill body at the measuring point are determined based on the stiffness and parametric mass of the rockfill body at the measuring point; and the dry density of the rockfill body at the measuring point is determined based on the parametric mass of the rockfill body at the measuring point.

[0088] It should be noted that the added mass method is to select a measuring point on the rockfill body, establish a vibration system consisting of an added mass block, a bearing plate, and a foundation dam body, and use the added mass method to measure the corresponding rockfill stiffness and parametric mass of the vibration system. Specifically, the parameters can be collected through the added mass method instrument.

[0089] Here, we can use known rockfill material properties and experimental data to establish a mathematical model for stiffness, wet density, dry density, and wet density. Then, using the measured stiffness and parametric mass, we can combine this model to estimate the wet and dry densities of the rockfill at the measurement point.

[0090] For example, in one example, based on the parametric mass, stiffness, wet density, parametric volume, dry density, and moisture content of each measuring point on the rockfill body in historical engineering test data, a parametric volume straight line graph in a wet density-parametric mass coordinate system and a moisture content straight line graph in a wet density-dry density coordinate system can be established. A parameter equivalence relationship between rockfill stiffness and wet density can be established, and the parametric volume straight line graph and the moisture content straight line graph can be grid-overlaid to obtain an added mass method theoretical quantity plate with wet density and rockfill stiffness as the abscissa and parametric mass and dry density as the ordinate. The corresponding parametric volume and moisture content can then be matched on the added mass method theoretical quantity plate, and the wet density and dry density of the rockfill body can be obtained based on the parametric volume and moisture content.

[0091] In this embodiment, the density of the rockfill body is measured non-destructively through the above method.

[0092] Based on the above embodiment, the permeability coefficient of the rockfill body at the measuring point is obtained by the following method:

[0093] determining the porosity ratio of the rockfill body at the measuring point;

[0094] inputting the porosity ratio of the rockfill body at the measuring point and the gradation of the rockfill body at the measuring point into a permeability coefficient prediction model, and obtaining the permeability coefficient of the rockfill body at the measuring point output by the permeability coefficient prediction model;

[0095] The permeability coefficient prediction model is obtained by training a CNN convolutional neural network using permeability coefficient training data, wherein the permeability coefficient training data includes the gradation, porosity and permeability parameters of the rockfill sample;

[0096] The gradation, porosity and permeability parameters of the rockfill sample are obtained by:

[0097] Constructing a gradation curve of the on-site dam material according to the gradation of the on-site dam material;

[0098] Determining the gradation of the indoor test dam material based on a preset gradation scale and the gradation curve of the on-site dam material;

[0099] Prepare indoor test dam materials based on the gradation of the indoor test dam materials and the on-site dam materials;

[0100] placing the indoor test dam material into a rigid mold and rolling and compacting it until the designed density is reached to obtain a rockfill sample, and obtaining a gradation curve of the rockfill sample;

[0101] Based on the gradation curve of the rockfill sample, a three-dimensional simulation model is reconstructed using a particle flow program PFC;

[0102] Based on the three-dimensional simulation model, obtaining the gradation and porosity ratio of the rockfill sample;

[0103] The permeability parameters of the rockfill sample are tested by a constant head permeability method.

[0104] Here, the porosity ratio of the rockfill body at the measuring point can be calculated based on the specific gravity and dry density of the rockfill body at the measuring point.

[0105] The specific gravity of the rockfill body is the relative density of the rockfill body, that is, the ratio of the density of the rockfill body to the density of pure water at standard atmospheric pressure and 3.98°C.

[0106] In this embodiment, the specific gravity and mass content percentage of two particle piles of different particle sizes can be measured to calculate the specific gravity of the entire rockfill mass at the measuring point. Specifically, a reference specific gravity of the particle pile of the first particle size is calculated based on the specific gravity and mass content percentage of the particle pile of the first particle size. A reference specific gravity of the particle pile of the second particle size is calculated based on the specific gravity and mass content percentage of the particle pile of the second particle size. Finally, the specific gravity of the entire rockfill mass at the measuring point is calculated based on the reference specific gravity of the particle pile of the first particle size and the particle pile of the second particle size.

[0107] Then, the porosity ratio of the rockfill is calculated based on the specific gravity and dry density of the rockfill. The porosity ratio is the ratio of the pore volume in the soil to the volume of its solid particles.

[0108] Then, the calculated porosity ratio of the rockfill body and the previously measured gradation of the rockfill body at the measuring point are input into the permeability coefficient prediction model, and the permeability coefficient of the rockfill body at the measuring point output by the permeability coefficient prediction model can be obtained.

[0109] In this embodiment, reference Figure 4 The permeability coefficient prediction model is based on the CNN convolutional neural network model, which is trained using the gradation, porosity and permeability parameters of the rockfill sample. The CNN convolutional neural network is divided into a three-layer structure: input layer, hidden layer and output layer, where the hidden layer includes convolution layer, pooling layer and fully connected layer.

[0110] In one example, you can first use the imageInput function to create the neural network input layer, use the convolution2d function to build the convolution layer, and use the relu function as the excitation function to perform nonlinear mapping on the convolution layer output. Then, use the maxPooling2d function to build the pooling layer, add a convolution layer after the pooling, and finally build the fully connected layer and output layer to construct the desired CNN convolutional neural network.

[0111] During the training process, the gradation and porosity of the rockfill sample are used as input parameters to obtain the permeability coefficient prediction results output by the CNN convolutional neural network. A loss function is constructed based on the root mean square error between the permeability coefficient prediction results and the permeability parameters of the rockfill sample. The CNN convolutional neural network is iteratively trained. The SGDM optimization algorithm can be used to accelerate the convergence process. After reaching the preset number of iterative training iterations, the trained permeability coefficient prediction model is obtained.

[0112] Here, the permeability coefficient training data can be obtained in the following way:

[0113] First, on-site dam materials (i.e., rock samples collected from actual construction sites or geological surveys) are collected and their gradation information is measured. Based on this information, a gradation curve is drawn, which shows the percentages of particles of different sizes. Next, the test dam material gradation to be used under laboratory conditions is determined based on the pre-set gradation scale and the on-site gradation curve.

[0114] Through screening, particles of each particle group with a certain mass are obtained. According to the gradation information of the indoor test dam material determined in the previous step, the stone mass required for the corresponding gradation particles is selected to configure the indoor test dam material.

[0115] The indoor test dam material is then placed in a rigid mold and compacted until the density reaches the design index, simulating the compaction or deposition process of rock in actual engineering projects. This gives a rockfill sample similar to the on-site rockfill. The gradation of this rockfill sample is then analyzed and its gradation curve is drawn.

[0116] Here, a 3D simulation model was reconstructed in a computer using the particle flow program PFC based on the gradation curve of the rockfill specimen. This 3D simulation model can simulate the physical and mechanical behavior of an actual rockfill. Specifically, based on the gradation curve of the given rockfill specimen, particles of the corresponding gradation are randomly generated within the generative domain constructed in the particle flow program PFC to fill the space. Gravity is then applied to these particles, causing them to experience downward gravitational acceleration, thereby simulating the likely arrangement of the rockfill specimen in real life. By analyzing the 3D simulation model, parameters such as the gradation and porosity of the simulated rockfill specimen can be obtained.

[0117] In this embodiment, the permeability parameters of the rockfill sample are tested using the constant head infiltration method. Specifically, the rockfill sample is placed in a permeability testing instrument. After the rockfill sample is installed, a water supply pipe and a regulating pipe are connected. Water is introduced into the regulating pipe, and the water stop clamp is slightly opened to gradually saturate the rockfill sample. The regulating pipe is raised to a level higher than the overflow hole. The regulating pipe is then separated from the water supply pipe and placed in a metal cylinder. The water stop clamp is opened to allow water to flow into the cylinder from the top. After the water level stabilizes, the seepage rate of the rockfill sample's seepage path and the head height at different measuring points are recorded. The seepage velocity is calculated based on the seepage rate and the cross-sectional area of ​​the seepage path. The hydraulic gradient is calculated based on the head height at different measuring points. Finally, the permeability coefficient is calculated based on the seepage velocity and the hydraulic gradient.

[0118] In this embodiment, the above method is used to achieve non-destructive measurement of the permeability coefficient of the rockfill body.

[0119] Based on the above embodiment, determining the dam material parameter detection result at the measuring point further includes:

[0120] When the density of the rockfill body at the measuring point does not meet the preset density index requirement, the density of the rockfill body at the measuring point is pit-measured; or when the gradation of the rockfill body at the measuring point does not meet the preset gradation index requirement, the gradation of the rockfill body at the measuring point is pit-measured.

[0121] In this embodiment, when the density or gradation of the rockfill body does not meet the preset index requirements, the density or gradation of the measuring point is tested using the pit test method.

[0122] The pit test method involves manually digging pits, weighing, and screening at designated measuring points after vibratory rolling for a specified number of times to obtain the mass content percentage of each particle group, i.e., the gradation of the rockfill body. The volume of the test pit is then measured by laying plastic film and filling with water, thereby obtaining the density of the rockfill body.

[0123] In this embodiment, based on the rapid non-destructive measurement point detection by combining the surface image with the radar map, unqualified measurement points are verified by digging holes, which greatly reduces the number of digging holes and improves the detection efficiency.

[0124] The following describes a complete set of equipment for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point provided by an embodiment of the present invention. The complete set of equipment for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point described below and the complete set of methods for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point described above can be referenced to each other.

[0125] The complete set of equipment for non-destructive testing of the same-point pit measurement parameters of the earth-rock dam filling quality is also applicable to the above-mentioned image acquisition equipment, which will not be described in detail here.

[0126] like Figure 5 As shown in the figure, the complete set of equipment for non-destructive testing of earth-rockfill dam filling quality parameters at the same point includes:

[0127] A first same-point nondestructive testing module 510 is configured to obtain a radar spectrum and an apparent image collected synchronously in the test area, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0128] A second same-point non-destructive testing module 520 is configured to obtain measurement points in the area to be tested based on the radar spectrum and the surface image, wherein the measurement points include a rock mass concentration area and / or an overhead area;

[0129] A third same-point non-destructive testing module 530 is configured to perform dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0130] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0131] The present invention provides a complete set of equipment for nondestructive testing of earth-rockfill dam fill quality parameters at the same point. The equipment acquires radar images and surface images simultaneously within the test area. The radar images are acquired by radar equipment, and the surface images are acquired by a video detection device, with the radar equipment and video detection device acquiring images at the same time. Based on the radar images and surface images, measuring points within the test area are identified, including areas with concentrated rock mass and / or overhead areas. Dam material parameters are then tested at the measuring points to determine the test results for the dam material parameters at the measuring points. The dam material parameters include the gradation of the rockfill, the density of the rockfill, and the permeability coefficient of the rockfill. The present invention uses an image acquisition device to select measuring points suspected of quality hazards based on a table-based combination of surface images acquired by the video detection device in the image acquisition device and radar images acquired by the radar equipment. This significantly reduces the uncertainty and missed detections caused by subjective selection of measuring points. This enables multi-parameter testing at the same measuring point, allowing for more accurate determination of whether the measuring point meets design specifications.

[0132] Figure 6 An example of a physical structure diagram of an electronic device is shown below. Figure 6 As shown, the electronic device may include: a processor 610, a communication interface 620, a memory 630, and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other via the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the complete method for the same-point non-destructive testing of the earth-rockfill dam fill quality pit measurement parameters, including:

[0133] Acquire a radar spectrum and an apparent image collected synchronously in the area to be measured, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0134] Based on the radar map and the surface image, obtaining measuring points in the area to be measured, wherein the measuring points include a rock mass concentration area and / or an overhead area;

[0135] Performing dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0136] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0137] It should be noted that the electronic device in this embodiment can be a server, a PC, or other devices in specific implementation, as long as its structure includes the following: Figure 6 The processor 610, communication interface 620, memory 630, and communication bus 640 are shown, wherein the processor 610, communication interface 620, and memory 630 communicate with each other via the communication bus 640, and the processor 610 can call the logic instructions in the memory 630 to execute the above method. This embodiment does not limit the specific implementation form of the electronic device.

[0138] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0139] Furthermore, an embodiment of the present invention discloses a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium. The computer program comprises program instructions. When the program instructions are executed by a computer, the computer is capable of executing the complete method for non-destructive testing of earth-rockfill dam fill quality parameters at the same point in a pit measurement, as provided in the above-mentioned method embodiments. The complete method for non-destructive testing of earth-rockfill dam fill quality parameters at the same point in a pit measurement, comprises:

[0140] Acquire a radar spectrum and an apparent image collected synchronously in the area to be measured, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same;

[0141] Based on the radar map and the surface image, obtaining measuring points in the area to be measured, wherein the measuring points include a rock mass concentration area and / or an overhead area;

[0142] Performing dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0143] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0144] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to perform the complete method for the same-point non-destructive testing of pit-measured parameters of earth-rockfill dam fill quality provided in each of the above embodiments. The complete method for the same-point non-destructive testing of pit-measured parameters of earth-rockfill dam fill quality provided in each of the above embodiments comprises: obtaining a radar spectrum and an apparent image collected synchronously in the test area, the radar spectrum being collected by the radar device, and the apparent image being collected by the video detection device, the image collection time of the radar device and the image collection time of the video detection device being the same;

[0145] Based on the radar map and the surface image, obtaining measuring points in the area to be measured, wherein the measuring points include a rock mass concentration area and / or an overhead area;

[0146] Performing dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body;

[0147] The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

[0148] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0149] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A complete method for non-destructive testing of earth-rockfill dam fill quality parameters at the same point, applied to an image acquisition device, the image acquisition device comprising a radar device and a video detection device, the video detection device being mounted on a handrail of the radar device, characterized in that: include: Acquire a radar spectrum and an apparent image collected synchronously in the area to be measured, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same; Based on the radar map and the surface image, obtaining measuring points in the area to be measured, wherein the measuring points include a rock mass concentration area and / or an overhead area; Performing dam material parameter detection on the measuring point to determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body; The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

2. The complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point according to claim 1 is characterized in that: The gradation of the rockfill body at the measuring point is obtained in the following way: Based on the apparent image of the measuring point, determining the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point by an image segmentation algorithm; Based on the radar spectrum and a standard radar spectrum corresponding to the preset internal particle group, determining the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point through an image comparison algorithm; the particle size of the preset internal particle group is larger than the particle size of the apparent particle group; determining the gradation of the rockfill body at the measuring point based on the particle mass content percentage of the apparent particle group of the rockfill body at the measuring point and the particle mass content percentage of the preset internal particle group of the rockfill body at the measuring point; The standard radar spectrum is obtained by the following method: preparing a model field, and filling each area of ​​the model field with stones of corresponding preset internal particle groups; The model field is scanned by radar equipment, and a standard radar map is prepared in combination with the regional positions of the stones of the preset internal particle group.

3. The complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point according to claim 1 is characterized in that: The density of the rockfill body at the measuring point is obtained in the following way: determining the stiffness and parametric mass of the rockfill body at the measuring point by an added mass method; Based on the stiffness and parametric mass of the rockfill body at the measuring point, the wet density and dry density of the rockfill body at the measuring point are determined.

4. The complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point according to claim 1 is characterized in that: The permeability coefficient of the rockfill body at the measuring point is obtained in the following way: determining the porosity ratio of the rockfill body at the measuring point; inputting the porosity ratio of the rockfill body at the measuring point and the gradation of the rockfill body at the measuring point into a permeability coefficient prediction model, and obtaining the permeability coefficient of the rockfill body at the measuring point output by the permeability coefficient prediction model; The permeability coefficient prediction model is obtained by training a CNN convolutional neural network using permeability coefficient training data, wherein the permeability coefficient training data includes the gradation, porosity and permeability parameters of the rockfill sample; The gradation, porosity and permeability parameters of the rockfill sample are obtained by the following method: Constructing a gradation curve of the on-site dam material according to the gradation of the on-site dam material; Determining the gradation of the indoor test dam material based on a preset gradation scale and the gradation curve of the on-site dam material; Prepare indoor test dam materials based on the gradation of the indoor test dam materials and the on-site dam materials; placing the indoor test dam material into a rigid mold and rolling and compacting it until the density reaches the design index, thereby obtaining a rockfill sample, and obtaining a gradation curve of the rockfill sample; Based on the gradation curve of the rockfill sample, a three-dimensional simulation model is reconstructed using a particle flow program PFC; Based on the three-dimensional simulation model, obtaining the gradation and porosity ratio of the rockfill sample; The permeability parameters of the rockfill sample are tested by a constant head permeability method.

5. The complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point according to claim 1 is characterized in that: The determining of the dam material parameter detection result at the measuring point further includes: When the density of the rockfill body at the measuring point does not meet the preset density index requirement, pit measurement is performed on the density of the rockfill body at the measuring point.

6. The complete method for non-destructive testing of earth-rockfill dam filling quality parameters at the same point according to claim 1 is characterized in that: The determining of the dam material parameter detection result at the measuring point further includes: When the gradation of the rockfill body at the measuring point does not meet the preset gradation index requirement, pit measurement is performed on the gradation of the rockfill body at the measuring point.

7. A complete set of equipment for non-destructive testing of earth-rockfill dam filling quality parameters at the same point, applied to an image acquisition device, the image acquisition device comprising a radar device and a video detection device, the video detection device being mounted on a handrail of the radar device, characterized in that: include: A first same-point nondestructive testing module is configured to obtain a radar spectrum and an apparent image collected synchronously in the test area, wherein the radar spectrum is collected by the radar device, and the apparent image is collected by the video detection device, and the image collection time of the radar device and the video detection device is the same; A second same-point non-destructive testing module is configured to obtain measurement points in the area to be tested based on the radar spectrum and the surface image, wherein the measurement points include a rock mass concentration area and / or an overhead area; a third same-point non-destructive testing module, configured to perform dam material parameter detection on the measuring point and determine the dam material parameter detection result at the measuring point, wherein the dam material parameters include the gradation of the rockfill body, the density of the rockfill body, and the permeability coefficient of the rockfill body; The area to be tested includes the rockfill area, transition area, cushion layer and anti-seepage layer; every 2000m 2 Arrange at least one measuring point every 500m in the transition zone. 2 Arrange at least one measuring point for every 200m in the cushion layer and the anti-seepage layer. 2 Arrange at least 1 measuring point.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for non-destructive testing of earth-rock dam filling quality pit measurement parameters at the same point as described in any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the complete method for same-point non-destructive testing of pit measurement parameters of earth-rockfill dam filling quality as described in any one of claims 1 to 6.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for non-destructive testing of earth-rockfill dam filling quality pit measurement parameters at the same point as described in any one of claims 1 to 6 is implemented.

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