Methods, apparatus, electronic equipment and media for determining seepage safety of earth-rock dams

Abstract

This invention provides a method, apparatus, electronic device, and medium for determining the seepage safety of earth-rock dams, relating to the field of dam health diagnosis. The method includes: traversing all measurement sections of the dam body and acquiring the original magnetic field data of all measurement points along the length of the dam body in each measurement section; performing a two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to acquire all current density data of each measurement point in each measurement section; and acquiring the wetting surface formed by the current density boundaries of all measurement sections based on the all current density data of each measurement point in each measurement section, so as to determine the seepage safety status of the dam body based on the water level high point of the wetting surface. This invention uses the magnetoresistivity method to determine the real-time wetting surface of the dam body, eliminating the need for drilling holes in the dam body roadway, making the detection process fast and non-destructive, with high accuracy, and enabling real-time and intuitive judgment of the seepage safety status of the dam body.

Description

Technical Field

[0001] This invention relates to the field of health diagnosis of earth-rock dams, and more particularly to a method, apparatus, electronic device and medium for determining the seepage safety of earth-rock dams. Background Technology

[0002] For the safety and health determination of seepage in earth-rock dams, high-density electrical resistivity tomography is usually used. However, due to the high resistance of the grounded cement pavement on the top of the earth-rock dam, the detection error on the top of the dam is relatively large. Summary of the Invention

[0003] This invention provides a method, device, electronic equipment, and medium for determining the seepage safety of earth-rock dams, in order to solve the technical problem of inaccurate detection when using high-density electrical resistivity methods to detect the dam body. This invention uses the magnetoresistivity method to detect the health status of the dam body.

[0004] In a first aspect, the present invention provides a method for determining the seepage safety of earth-rock dams, comprising:

[0005] Traverse all measurement sections of the dam body and obtain the original magnetic field data of all measurement points along the length of the dam body in each measurement section;

[0006] Two-dimensional inversion is performed based on the target magnetic field data of all measurement points in each measurement section to obtain all current density data of each measurement point in each measurement section.

[0007] Based on all current density data at each measurement point in each measurement section, the wetting surface formed by the current density boundary lines of all measurement sections is obtained, so as to determine the seepage safety status of the dam body based on the water level high point of the wetting surface.

[0008] The measured cross section is determined based on the plane formed by the length direction and the depth direction of the dam body;

[0009] The target magnetic field data is the magnetic field component data of the original magnetic field data along the length of the dam body.

[0010] According to the method for determining the seepage safety of earth-rock dams provided by the present invention, the step of obtaining the wetting surface formed by the current density boundary lines of all measurement sections based on all current density data of each measurement point in each measurement section includes:

[0011] The vertical gradient is calculated based on all current density data at any measurement point, and the point with the largest gradient is determined as the point with the largest current change at the measurement point.

[0012] Traverse all measurement points in any measurement section and determine the point of maximum current change among all measurement points in the measurement section.

[0013] Connect the points with the largest current changes at all measurement points to obtain the current density boundary line of the measurement section;

[0014] Traverse all measurement sections and obtain the current density boundary lines for all measurement sections;

[0015] The current density boundary lines of all measured sections are transformed in three dimensions to obtain the saturation surface of the dam body.

[0016] The method for determining the seepage safety of an earth-rock dam according to the present invention includes, before traversing all measurement sections of the dam body:

[0017] Initialize the dam body detection environment, and form a current measurement circuit with the dam body saturation surface as the current transmission medium based on the upstream and downstream electrodes;

[0018] The upstream electrode is spaced apart from the upstream bottom end of the dam body;

[0019] The downstream electrode is spaced apart from the downstream bottom end of the dam body;

[0020] Both the upstream electrode and the downstream electrode are located on the plane at the bottom of the reservoir.

[0021] According to the method for determining the seepage safety of earth-rock dams provided by the present invention, the step of traversing all measurement sections of the dam body and obtaining the original magnetic field data of all measurement points along the length of the dam body in each measurement section includes:

[0022] The dam body is divided according to a first preset interval to obtain all measured profiles;

[0023] The original magnetic field data of all measurement points along the length of the dam body on any measurement profile are collected using magnetic field detection equipment.

[0024] Traverse all measurement sections of the dam body and obtain the original magnetic field data of all measurement points corresponding to each measurement section.

[0025] According to the method for determining the seepage safety of earth-rock dams provided by the present invention, the step of acquiring all current density data at each measurement point in each measurement section includes:

[0026] For any measurement section, acquire all current density data at a specific distance below the dam body from each measurement point in the vertical direction;

[0027] The specific distance is determined based on the elevation difference between the measurement point and the dam's anti-seepage wall.

[0028] According to the method for determining the seepage safety of an earth-rock dam provided by the present invention, the step of determining the seepage safety state of the dam body based on the high water level of the seepage surface includes:

[0029] Obtain the target phreatic line corresponding to each measured profile of the phreatic surface, wherein the measured profile is determined based on the plane formed by the width direction and the depth direction of the dam body;

[0030] If the target infiltration line corresponding to any measurement profile is lower than the warning infiltration line, the measurement profile is determined to be in a safe state.

[0031] If the target infiltration line corresponding to any measurement profile is equal to or higher than the warning infiltration line, and equal to or lower than the danger infiltration line, the measurement profile is determined to be in a state of safety doubt.

[0032] If the target infiltration line corresponding to any measurement profile is higher than the danger infiltration line, the measurement profile is determined to be in a dangerous state.

[0033] The warning infiltration line is determined based on the average of all first surface permeability coefficients. The first surface permeability coefficient is a first preset number of surface permeability coefficients obtained from all measuring points on the dam surface in ascending order of surface permeability coefficient.

[0034] The danger infiltration line is determined based on the average of all second surface permeability coefficients, which are a second preset number of surface permeability coefficients obtained from all measuring points on the dam surface in descending order of surface permeability coefficient.

[0035] According to the method for determining the seepage safety of earth-rock dams provided by the present invention, obtaining the target phreatic line corresponding to each measurement profile of the phreatic surface includes:

[0036] The immersion surface is divided according to the second preset interval to obtain all measurement profiles;

[0037] Obtain all water level high points along the width of the dam in each measurement profile;

[0038] Connect all the high water level points in the measured profile to obtain the target infiltration line corresponding to the measured profile.

[0039] Secondly, the present invention provides a device for measuring the seepage safety of earth-rock dams, comprising:

[0040] First acquisition unit: used to acquire the original magnetic field data of all measurement points along the length of the dam body in each measurement section by traversing all measurement sections of the dam body using magnetic field detection equipment;

[0041] The second acquisition unit is used to perform two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to acquire all current density data of each measurement point in each measurement section of the dam body at different depths.

[0042] Determination Unit: Based on all current density data of each measurement point in each measurement section, obtain the seepage surface formed by the current density boundary lines of all measurement sections, and determine the seepage safety status of the dam body based on the water level high point of the seepage surface.

[0043] The measured cross section is determined based on the plane formed by the length direction and the depth direction of the dam body;

[0044] The target magnetic field data is the magnetic field component data of the original magnetic field data along the length of the dam body.

[0045] Thirdly, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for determining the seepage safety of the earth-rock dam.

[0046] Fourthly, a non-transitory computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements a method for determining the seepage safety of the earth-rock dam.

[0047] This invention proposes a method, device, electronic equipment, and medium for determining the seepage safety of earth-rock dams. By acquiring the original magnetic field data of all measurement points at different measurement sections, and performing two-dimensional inversion based on the target magnetic field data to obtain all current density data, a seepage surface is constructed based on the current density boundary lines of all measurement sections corresponding to all current density data. Finally, the seepage safety state of the dam is determined based on the seepage surface. This invention uses the magnetoresistivity method to determine the real-time seepage surface of the dam, eliminating the need for drilling holes in the dam road, making the detection process fast and non-destructive, with high accuracy, and enabling real-time and intuitive judgment of the seepage safety state of the dam. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is one of the flowcharts illustrating the method for determining the seepage safety of earth-rock dams provided by the present invention;

[0050] Figure 2 This is a schematic diagram of the process for obtaining the wetted surface provided by the present invention;

[0051] Figure 3 This is a schematic diagram of the process for obtaining raw magnetic field data provided by the present invention;

[0052] Figure 4 This is a schematic diagram of the process for determining the seepage safety status of a dam body, provided by the present invention.

[0053] Figure 5 This is a schematic diagram of the process for obtaining the target wetting line provided by the present invention;

[0054] Figure 6 This is a schematic diagram of the seepage line of the two-dimensional cross-section dam body provided by the present invention;

[0055] Figure 7 This is a field schematic diagram of the dam seepage safety measurement provided by the present invention;

[0056] Figure 8 This is a schematic diagram of the measurement cross-section of the dam body provided by the present invention;

[0057] Figure 9 This is a schematic diagram of the structure of the device for measuring the seepage safety of earth-rock dams provided by the present invention;

[0058] Figure 10 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0060] The change in the position of the seepage surface within the dam body is one of the key indicators for diagnosing the health status of earth-rock dams during operation. Traditional methods for determining the seepage surface position involve burying piezometers and permeameters within the dam body to measure water levels. However, most reservoirs with safety risks were not equipped with such devices during construction, or the installation of piezometers and permeameters is inadequate. Furthermore, the failure rate of these devices increases significantly with dam operation time and they are often irreplaceable. Observing the seepage line at the buried section is insufficient to monitor the overall seepage surface of the dam. Therefore, a new, rapid, and non-destructive method for detecting the seepage surface position is urgently needed. To address these technical problems, this invention provides a method, device, electronic equipment, and medium for determining the seepage safety of earth-rock dams. Figure 1 This is one of the flowcharts illustrating the method for determining the seepage safety of earth-rock dams provided by the present invention. The method includes:

[0061] 101. Traverse all measurement sections of the dam body and obtain the original magnetic field data of all measurement points along the length of the dam body in each measurement section;

[0062] 102. Based on the target magnetic field data of all measurement points in each measurement section, perform two-dimensional inversion to obtain all current density data of each measurement point in each measurement section.

[0063] 103. Based on all current density data at each measurement point in each measurement section, obtain the saturation surface formed by the current density boundary lines of all measurement sections, and determine the safety status of the dam body based on the water level high point of the saturation surface.

[0064] The measured cross section is determined based on the plane formed by the length direction and the depth direction of the dam body;

[0065] The target magnetic field data is the magnetic field component data of the original magnetic field data along the length of the dam body.

[0066] In step 101, the present invention divides the dam body along its width direction and sequentially obtains all the measurement sections of the dam body at intervals. Figure 8 This is a schematic diagram of the measurement cross-section of the dam body provided by the present invention, as shown below. Figure 8 As shown, each dashed line represents the position above the dam body at the measurement section. By traversing all measurement sections of the dam body, the original magnetic field data of all measurement points along the length of the dam body in each measurement section are obtained in sequence. Those skilled in the art will understand that by representing the measurement points with the dashed lines, the magnetic field data at each measurement point can be obtained along the length of the dam body using the magnetic field data measurement equipment.

[0067] In step 102, a two-dimensional inversion is performed based on the target magnetic field data of all measurement points in each measurement section to obtain all current density data of each measurement point in each measurement section. The target magnetic field data is obtained from the original magnetic field data. Specifically, the original magnetic field data includes magnetic field component data in the dam length direction, magnetic field component data in the dam width direction, and magnetic field component data in the dam depth direction. Optionally, magnetic field component data in any direction can be used as the target magnetic field data. In an optional embodiment, the magnetic field component data along the dam length direction has the highest signal-to-noise ratio, corresponds most intuitively to the abnormal state, and is the component with the best forward and inverse modeling effect. Therefore, the magnetic field component data along the dam length direction of the original magnetic field data can be used as the target magnetic field data, and a two-dimensional inversion is performed on the magnetic field component of each profile to obtain all current density data of each measurement point in each measurement section, that is, to obtain the current density distribution profile map corresponding to all current density data.

[0068] In step 103, based on all current density data at each measurement point in each measurement section, the wetting surface formed by the current density boundaries of all measurement sections is obtained. Those skilled in the art understand that the wetting surface reflects the interface of abrupt changes in water content within the dam body. Due to these abrupt changes in internal water content, the resistivity of the medium inside the dam also changes; that is, the wetting surface reflects the interface of resistivity of the medium inside the dam. Since the boundary of resistivity of the medium inside the dam can also be reflected by current density, the wetting surface reflects the current density interface. This invention performs vertical gradient calculation on the data in the inverted current density profile. The point with the largest gradient is the point of the largest current change. Connecting all points with the largest current changes determines the current density interface of each measurement section. The wetting surface is formed based on the current density boundaries of all measurement sections. With the wetting surface obtained from real-time monitoring of the dam body, the current water level information can be determined. Based on the water level height of the wetting surface, it can be determined whether the dam body is in a safe state.

[0069] Optionally, before traversing all measured sections of the dam body, the following is included:

[0070] Initialize the dam body detection environment, and form a current measurement circuit with the dam body saturation surface as the current transmission medium based on the upstream and downstream electrodes;

[0071] The upstream electrode is spaced apart from the upstream bottom end of the dam body;

[0072] The downstream electrode is spaced apart from the downstream bottom end of the dam body;

[0073] Both the upstream electrode and the downstream electrode are located on the plane at the bottom of the reservoir.

[0074] like Figure 7 As shown, the left side is the upstream of the dam body and the right side is the downstream of the dam body. The upstream electrode is set at a distance from the dam body, and the downstream electrode is also set at a distance from the dam body. The farther the upstream and downstream electrodes are from the dam body, the higher the altitude position of the current can penetrate through the internal penetration area of ​​the dam body. The present invention can adjust the setting position of the upstream and downstream electrodes so that the current flows through the dam body and can achieve full coverage inside the dam body.

[0075] like Figure 7 As shown, the upper reservoir is the upstream of the reservoir, and the lower reservoir is the downstream of the reservoir. The power supply is on the same plane as the upstream electrode and the downstream electrode, but the power supply equipment can be a generator, which is set away from the upstream electrode and the downstream electrode. The upstream electrode can be the positive electrode, and the downstream electrode can be the negative electrode.

[0076] Because the upstream water level is higher than the downstream water level, the water inside the dam will form an irregularly shaped slope, which is reflected in... Figure 7In this invention, the sloping surface from top to bottom changes with the upstream and downstream water levels. Because the invention includes upstream and downstream electrodes, a directional current is formed between them, using the sloping surface inside the dam as the medium. This current generates a magnetic field. The invention aims to determine the sloping surface by acquiring this magnetic field. Both the upstream and downstream electrodes are located on the plane at the bottom of the reservoir. Compared to the high-density electrical resistivity method used in existing technologies, the magnetoresistivity method used in this invention measures the magnetic field, thus eliminating the need for grounding and making it easier to implement in areas with poor grounding conditions. Furthermore, compared to the high-density electrical resistivity method, the magnetoresistivity measurement method used in this invention has higher sensitivity to conductive targets under medium-to-low resistivity conductive capstan, and the detection is rapid and non-destructive, allowing for quick determination of the dam's seepage safety status.

[0077] Optionally, acquiring all current density data at each measurement point in each measurement section includes:

[0078] For any measurement section, acquire all current density data at a specific distance below the dam body from each measurement point in the vertical direction;

[0079] The specific distance is determined based on the elevation difference between the measurement point and the dam's anti-seepage wall.

[0080] The dam body is typically an earth-rock dam, which is permeable. When a water level difference exists between the upstream and downstream of the dam body, electrodes are placed upstream and downstream of the dam body. Current flows through the wetting surface inside the dam body. Because the medium on the wetting surface is different from that on the non-wetting surface, the current density varies at different locations within the dam body. The current tends to flow towards the medium with lower resistance. To obtain the current density at different depths and locations below the dam body, it is necessary to perform a two-dimensional inversion of the target magnetic field data of all measurement points in each measurement section. This allows the determination of all current density data at a specific distance below the dam body in the vertical direction from each measurement point. The specific distance is determined based on the elevation difference between the measurement point elevation and the elevation of the dam body's anti-seepage wall. This invention assumes that there is no seepage below the anti-seepage wall. The area between the elevation of the measurement point and the elevation of the dam body's anti-seepage wall is considered to be where current flows. This invention converts the magnetic field data into current density in the vertical direction below the measurement point and combines all measurement points to characterize the specific conditions of the wetting surface inside the dam body.

[0081] Those skilled in the art will understand that existing high-density electrical resistivity methods for determining seepage safety in earth-rock dams typically involve measuring the electric field. However, measuring the electric field requires nailing electrodes to the measurement point, which can damage the dam body. In contrast, the magnetoresistivity method in this invention uses a magnetic field measurement method, which eliminates the need to nail electrodes or drill holes in the dam body. Furthermore, since the magnetic field is a penetrating field, its measurement can be performed using any magnetic field acquisition device, and magnetic field data for each measurement point can be obtained by severing the dam body.

[0082] In existing high-density electrical resistivity tomography (EDS) methods for detecting the seepage surface, grounding is usually required. However, poor electrode contact can cause nonlinear drift in the measurement results that is difficult to eliminate. For example, the grounding resistance of the cement pavement on the top of earth-rock dams is usually high, resulting in a large detection error at the top of the dam. Furthermore, high-density EDS is greatly affected by shallow low-resistivity capping layers. When a low-resistivity layer exists in the shallow part, the supply current cannot flow to the deeper part but passes through the shallow part, forming a "short circuit" effect, resulting in a detection blind zone in the deeper part. Moreover, using high-density EDS requires drilling holes in the cement pavement on the top of the dam or the concrete panel of the dam, which can damage the dam. Compared with conventional high-density EDS, this invention avoids the influence of excessively high grounding resistance, has high detection accuracy, is fast and non-destructive, does not require drilling holes in the dam road to insert electrodes, and the detection process will not cause any damage to the dam body. It can provide a clear critical state of the cross-sectional seepage line, which is convenient for directly determining the seepage safety of the dam body.

[0083] This invention proposes a method, device, electronic equipment, and medium for determining the seepage safety of earth-rock dams. By acquiring the original magnetic field data of all measurement points at different measurement sections, and performing two-dimensional inversion based on the target magnetic field data, all current density data are obtained. The wetting surface is constructed based on the current density boundary lines of all measurement sections corresponding to all current density data. Finally, the safety status of the dam is determined based on the wetting surface. This invention uses the magnetoresistivity method to determine the real-time wetting surface of the dam, eliminating the need for drilling holes in the dam road, making the detection process fast and non-destructive, with high accuracy, and enabling real-time and intuitive judgment of the dam's safety status.

[0084] Figure 2 This is a schematic diagram of the process for obtaining the wetting surface provided by the present invention. The step of obtaining the wetting surface formed by the current density boundaries of all measurement sections based on all current density data at each measurement point in each measurement section includes:

[0085] 1031. Calculate the vertical gradient based on all current density data at any measurement point, and determine the point with the largest gradient as the point with the largest current change at the measurement point.

[0086] 1032. Traverse all measurement points in any measurement section and determine the point of maximum current change among all measurement points in the measurement section;

[0087] 1033. Connect the points with the largest current changes at all measurement points to obtain the current density boundary line of the measurement section;

[0088] 1034. Traverse all measurement sections and obtain the current density boundary lines of all measurement sections;

[0089] 1035. The current density boundary lines of all measured sections are transformed in three dimensions to obtain the saturation surface of the dam body.

[0090] In step 1031, the vertical gradient is calculated based on all current density data at any measurement point, and the point with the largest gradient is determined as the point of maximum current change at the measurement point. The gradient point is mathematically the point with the largest derivative. When the resistivity changes the most at a certain point, the gradient at that point is the largest, and this point is taken as the point of abrupt change in current change. At different depths below any measurement point in any measurement section, the current density data are different. By performing two-dimensional inversion on the target magnetic field data, all current density data of each measurement point in each measurement section can be obtained. The all current density data is the current density distribution at all heights vertically downward from the measurement point. The derivative of the current density distribution is then calculated to numerically determine the point with the largest gradient, and the point with the largest gradient is determined as the point of maximum current change at the measurement point.

[0091] In step 1032, all measurement points in any measurement section are traversed to determine the point of maximum current change among all measurement points in the measurement section. After learning the measurement method for determining the point of maximum current change at any measurement point, all measurement points in any measurement section are traversed to determine the point of maximum current change corresponding to each measurement point in the measurement section.

[0092] In step 1033, the point of maximum current change of all measurement points is connected to obtain the current density boundary line of the measurement section. For any measurement section, there are measurement points set along the length of the dam body, and each measurement point corresponds to a point of maximum current change. Connecting the points of maximum current change of all measurement points will form a curve in the plane of the measurement section. The curve is the current density boundary line, which can represent the current density distribution at different measurement points under the current measurement section.

[0093] Those skilled in the art will understand that the resistivity of the medium above the wetting surface is very high, and the current passing through it will be less; below the wetting surface, the water is more saturated, which leads to a lower resistivity of the medium, and the current passing through it is greater. The critical position between the two media is the critical line where the current changes, which is the current density boundary line.

[0094] In step 1034, all measurement sections are traversed to obtain the current density boundary lines of all measurement sections. Since there is more than one measurement section in the dam body, steps 1031 to 1033 are executed for each measurement section to obtain the current density boundary lines of all measurement sections.

[0095] In step 1035, the current density boundary lines of all measured sections are transformed in three dimensions to obtain the wetting surface of the dam body. This invention can transform all current density boundary lines in two-dimensional space through smoothing processing, connecting all current density boundary lines of the measured sections to form the wetting surface of the dam body. Optionally, the points of maximum current change corresponding to all current density boundary lines along the width direction of the dam body in each measured section can be connected sequentially. If the current density boundary lines form a transverse plane, then the points of maximum current change corresponding to all current density boundary lines along the width direction of the dam body in each measured section form a longitudinal plane. The wetting surface of the dam body in three dimensions is determined based on the transverse and longitudinal planes. In another optional embodiment, the wetting surface of the dam body can also be obtained by interpolating the discretized current density boundary lines.

[0096] Figure 3 This is a schematic diagram of the process for obtaining raw magnetic field data provided by the present invention. The step of traversing all measurement sections of the dam body and obtaining the raw magnetic field data of all measurement points along the length of the dam body in each measurement section includes:

[0097] 1011. Divide the dam body according to the first preset interval and obtain all measured profiles;

[0098] 1012. Collect the original magnetic field data of all measuring points along the length of the dam body on any measuring profile using magnetic field detection equipment;

[0099] 1013. Traverse all the measurement sections of the dam body and obtain the original magnetic field data of all measurement points corresponding to each measurement section.

[0100] In step 1011, the first preset interval is 5m, meaning that a measurement point is set every 5m, that is, all measurement sections of the dam are traversed to obtain the original magnetic field data of all measurement points corresponding to each measurement section. The smaller the first preset interval, the more original magnetic field data of the measurement points are obtained, and the more accurate the measurement results will be.

[0101] In step 1012, the present invention can collect the original magnetic field data of all measuring points along the length of the dam body of any measuring profile using a handheld magnetic field detection device, or it can collect the original magnetic field data of all measuring points along the length of the dam body of any measuring profile using an automatic data acquisition vehicle.

[0102] In step 1013, all measurement sections of the dam body are traversed to obtain the original magnetic field data of all measurement points corresponding to each measurement section. For each measurement section of the dam body, step 1012 is executed until the original magnetic field data of all measurement points corresponding to each measurement section is obtained.

[0103] Figure 4 This is a flowchart illustrating the process for determining the seepage safety status of a dam body according to the present invention. The step of determining the seepage safety status of the dam body based on the highest water level point of the seepage surface includes:

[0104] 1036. Obtain the target phreatic line corresponding to each measured profile of the phreatic surface, wherein the measured profile is determined based on the plane formed by the width direction of the dam body and the depth direction of the dam body;

[0105] 1037. If the target wetting line corresponding to any measurement profile is lower than the warning wetting line, the measurement profile is determined to be in a seepage safe state.

[0106] 1038. If the target infiltration line corresponding to any measurement profile is equal to or higher than the warning infiltration line and equal to or lower than the danger infiltration line, the measurement profile is determined to be in a state of safety doubt.

[0107] 1039. If the target infiltration line corresponding to any measurement profile is higher than the danger infiltration line, the measurement profile is determined to be in a dangerous state.

[0108] The warning infiltration line is determined based on the average of all first surface permeability coefficients. The first surface permeability coefficient is a first preset number of surface permeability coefficients obtained from all measuring points on the dam surface in ascending order of surface permeability coefficient.

[0109] The danger infiltration line is determined based on the average of all second surface permeability coefficients, which are a second preset number of surface permeability coefficients obtained from all measuring points on the dam surface in descending order of surface permeability coefficient.

[0110] Figure 6 This is a schematic diagram of the saturation line of a two-dimensional dam body provided by the present invention. Those skilled in the art will understand that the dam body below the saturation line will be saturated with water, while the dam body above the saturation line will not be saturated with water due to the possible presence of air. The saturation line can be an irregular arc surface. Those skilled in the art will understand that the saturation line referred to in the present invention is a two-dimensional plane, while the saturation surface is a three-dimensional solid structure.

[0111] In step 1036, the target phreatic line corresponding to each measurement profile of the phreatic surface is obtained. The measurement profile is determined based on the plane formed by the width direction and the depth direction of the dam body. In this invention, the measurement section is the plane formed by the length direction and the depth direction of the dam body, and the measurement profile is determined based on the plane formed by the width direction and the depth direction of the dam body. That is, the measurement profile is used as the measurement unit, the target phreatic line in the measurement profile is determined, and the measurement result of the target phreatic line is used as the criterion for judging whether the dam body is safe.

[0112] In step 1037, if the target phreatic line corresponding to any measurement profile is lower than the warning phreatic line, the measurement profile is determined to be in a safe state. The warning phreatic line is determined based on the average of all first surface permeability coefficients. The first surface permeability coefficient is a first preset number of surface permeability coefficients obtained from all measuring points on the dam surface in ascending order of surface permeability coefficient. Those skilled in the art will understand that the measurement is different from the measuring point, which is a test point set up to test the dam surface permeability system. This invention can be performed along the maximum cross section or the dangerous section. Multiple measuring points are evenly selected from the upstream and downstream water surfaces to the top of the dam to measure the surface permeability coefficient. After determining all the measured surface permeability systems, the first preset number can be 3, that is, the surface permeability coefficients of 3 obtained in ascending order are selected, the average value is taken to obtain the average value of all first surface permeability coefficients, and then based on the average value parameter of the first surface permeability coefficient, the seepage line of the corresponding cross section is calculated and determined according to the application AutoBank, which is the warning seepage line. If the target seepage line is lower than the warning seepage line, the dam body at the location corresponding to the measured profile is considered safe and the seepage of the profile is safe.

[0113] In step 1038, if the target phreatic line corresponding to any measurement profile is equal to or higher than the warning phreatic line, and equal to or lower than the danger phreatic line, the measurement profile is determined to be in a state of safety doubt. The danger phreatic line is determined based on the average of all second surface permeability coefficients. The second surface permeability coefficient is a second preset number of surface permeability coefficients obtained from all measuring points on the dam surface in descending order of surface permeability coefficient. Those skilled in the art will understand that the present invention can uniformly select multiple surface permeability coefficients along the maximum cross-section or danger section, from the upstream and downstream water surfaces to the dam crest. At each measuring point, the surface permeability coefficient is measured. After determining all the measured surface permeability systems, the second preset number can be 3, that is, the surface permeability coefficients of 3 obtained in descending order are selected, the average value is taken, and then the average value of all second surface permeability coefficients is obtained. Based on the average value parameter of the first surface permeability coefficient, the phreatic line of the corresponding cross section is calculated and determined according to the application AutoBank, which is the danger phreatic line. If the target phreatic line is equal to or higher than the warning phreatic line and equal to or lower than the danger phreatic line, then slope stability analysis needs to be carried out for further safety assessment.

[0114] In step 1039, if the target phreatic line corresponding to any measured profile is higher than the danger phreatic line, the measured profile is determined to be in a dangerous state; if the target phreatic line is higher than the danger phreatic line, the section is considered to be in danger. This invention analyzes the safety status of all measured profiles to assess the overall safety of the dam body, thereby improving the accuracy of dam safety assessment.

[0115] Figure 5 This is a schematic diagram of the process for obtaining the target wetting line provided by the present invention. The process of obtaining the target wetting line corresponding to each measurement profile of the wetting surface includes:

[0116] 10361. Divide the immersion surface according to the second preset interval to obtain all measurement profiles;

[0117] 10362. Obtain all water level high points along the width of the dam in each measurement profile;

[0118] 10363. Connect all the high water level points in the measured profile to obtain the target infiltration line corresponding to the measured profile.

[0119] In step 10361, the second preset spacing may be the same as or different from the first preset spacing. For example, the immersion surface may be divided into segments with a 10-meter interval to obtain all measurement profiles.

[0120] In step 10362, all water level high points along the width of the dam are obtained in each measurement profile. Since the wetting surface reflects the boundary between whether the water below the dam is saturated, all water level high points along the width of the dam can be determined for each measurement profile.

[0121] In step 10363, all high water level points in the measurement profile are connected to obtain the target wetting line corresponding to the measurement profile. Those skilled in the art will understand that the high water level points are the points of maximum current change, i.e., the points of maximum gradient. However, since the test object of the present invention is the wetting surface, and for a three-dimensional entity formed after three-dimensional transformation, there is relative uncertainty and error in all the points of maximum current change. However, the present invention can reduce the first preset spacing to make the constructed wetting surface as accurate as possible, thereby making the final measurement result more accurate.

[0122] Figure 9 This is a schematic diagram of the structure of the seepage safety measuring device for earth-rock dams provided by the present invention, including a first acquisition unit 1: used to acquire the original magnetic field data of all measuring points along the length of the dam body in each measuring section by traversing all measuring sections of the dam body with a magnetic field detection device. The working principle of the first acquisition unit 1 can be referred to the aforementioned step 101, and will not be repeated here.

[0123] The device for measuring the seepage safety of the earth-rock dam also includes a second acquisition unit 2: used to perform two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to obtain all current density data of each measurement point in each measurement section at different depths of the dam body. The working principle of the second acquisition unit 2 can be referred to the aforementioned step 102, and will not be repeated here.

[0124] The device for measuring the seepage safety of the earth-rock dam also includes a determination unit 3: based on all current density data of each measuring point in each measuring section, the wetting surface formed by the current density boundary lines of all measuring sections is obtained, so as to determine the safety status of the dam body based on the water level high point of the wetting surface. The working principle of the determination unit 3 can be referred to the aforementioned step 103, and will not be repeated here.

[0125] The measured cross section is determined based on the plane formed by the length direction and the depth direction of the dam body;

[0126] The target magnetic field data is the magnetic field component data of the original magnetic field data along the length of the dam body.

[0127] This invention proposes a method, device, electronic equipment, and medium for determining the seepage safety of earth-rock dams. By acquiring the original magnetic field data of all measurement points at different measurement sections, and performing two-dimensional inversion based on the target magnetic field data to obtain all current density data, a seepage surface is constructed based on the current density boundary lines of all measurement sections corresponding to all current density data. Finally, the safety status of the dam body is determined based on the seepage surface. This invention uses the magnetoresistivity method to determine the real-time seepage surface of the dam body, eliminating the need for drilling holes in the dam body road, making the detection process fast and non-destructive, with high accuracy, and enabling real-time and intuitive judgment of the seepage safety status of the dam body.

[0128] Figure 10 This is a schematic diagram of the structure of the electronic device provided by the present invention. For example... Figure 10 As shown, the electronic device may include: a processor 110, a communication interface 120, a memory 130, and a communication bus 140, wherein the processor 110, the communication interface 120, and the memory 130 communicate with each other through the communication bus 140. The processor 110 can call logic instructions in the memory 130 to execute a method for determining the seepage safety of an earth-rock dam. This method includes: traversing all measurement sections of the dam body and acquiring the original magnetic field data of all measurement points along the length of the dam body in each measurement section; performing a two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to acquire all current density data of each measurement point in each measurement section; acquiring the phreatic surface formed by the current density boundaries of all measurement sections based on the all current density data of each measurement point in each measurement section, and determining the safety state of the dam body based on the high water level of the phreatic surface; the measurement section is determined by a plane formed by the length direction and depth direction of the dam body; the target magnetic field data is the magnetic field component data of the original magnetic field data along the length direction of the dam body.

[0129] Furthermore, the logical instructions in the aforementioned memory 130 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0130] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute a method for determining the seepage safety of an earth-rock dam provided by the above methods. The method includes: traversing all measurement sections of the dam body and obtaining the original magnetic field data of all measurement points along the length direction of the dam body in each measurement section; performing a two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to obtain all current density data of each measurement point in each measurement section; obtaining the phreatic surface formed by the current density boundary lines of all measurement sections based on the all current density data of each measurement point in each measurement section, so as to determine the safety state of the dam body based on the water level high point of the phreatic surface; the measurement section is determined by a plane formed by the length direction and the depth direction of the dam body; the target magnetic field data is the magnetic field component data of the original magnetic field data along the length direction of the dam body.

[0131] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a method for determining the seepage safety of an earth-rock dam provided by the methods described above. This method includes: traversing all measurement sections of the dam body and acquiring the original magnetic field data of all measurement points along the length of the dam body in each measurement section; performing a two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to acquire all current density data of each measurement point in each measurement section; acquiring the phreatic surface formed by the current density boundaries of all measurement sections based on the all current density data of each measurement point in each measurement section, and determining the safety state of the dam body based on the high water level of the phreatic surface; the measurement section is determined by a plane formed by the length direction and depth direction of the dam body; the target magnetic field data is the magnetic field component data of the original magnetic field data along the length direction of the dam body.

[0132] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0133] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the seepage safety of an earth-rock dam, characterized in that, include: Traverse all measurement sections of the dam body and obtain the original magnetic field data of all measurement points along the length of the dam body in each measurement section; The measured cross section is determined based on the plane formed by the length direction and the depth direction of the dam body; Two-dimensional inversion is performed based on the target magnetic field data of all measurement points in each measurement section to obtain all current density data of each measurement point in each measurement section; the target magnetic field data is the magnetic field component data of the original magnetic field data along the length of the dam body. The vertical gradient is calculated based on all current density data at any measurement point, and the point with the largest gradient is determined as the point with the largest current change at the measurement point. Traverse all measurement points in any measurement section and determine the point of maximum current change among all measurement points in the measurement section. Connect the points with the largest current changes at all measurement points to obtain the current density boundary line of the measurement section; Traverse all measurement sections and obtain the current density boundary lines for all measurement sections; The current density boundary lines of all measured sections are transformed in three dimensions to obtain the wetting surface of the dam body; Obtain the target phreatic line corresponding to each measured profile of the phreatic surface, wherein the measured profile is determined based on the plane formed by the width direction and the depth direction of the dam body; If the target infiltration line corresponding to any measurement profile is lower than the warning infiltration line, the measurement profile is determined to be in a safe state. If the target infiltration line corresponding to any measurement profile is equal to or higher than the warning infiltration line, and equal to or lower than the danger infiltration line, the measurement profile is determined to be in a state of safety doubt. If the target infiltration line corresponding to any measurement profile is higher than the danger infiltration line, the measurement profile is determined to be in a dangerous state. The warning infiltration line is determined based on the average of all first surface permeability coefficients. The first surface permeability coefficient is a first preset number of surface permeability coefficients obtained from all measuring points on the dam surface in ascending order of surface permeability coefficient. The danger infiltration line is determined based on the average of all second surface permeability coefficients, which are a second preset number of surface permeability coefficients obtained from all measuring points on the dam surface in descending order of surface permeability coefficient.

2. The method for determining the seepage safety of earth-rock dams according to claim 1, characterized in that, Before traversing all the measured sections of the dam body, including: Initialize the dam body detection environment, and form a current measurement circuit with the dam body saturation surface as the current transmission medium based on the upstream and downstream electrodes; The upstream electrode is spaced apart from the upstream bottom end of the dam body; The downstream electrode is spaced apart from the downstream bottom end of the dam body; Both the upstream electrode and the downstream electrode are located on the plane at the bottom of the reservoir.

3. The method for determining the seepage safety of earth-rock dams according to claim 1, characterized in that, The process involves traversing all measurement sections of the dam body and acquiring the original magnetic field data of all measurement points along the length of the dam body in each measurement section, including: The dam body is divided according to a first preset interval to obtain all measured profiles; The original magnetic field data of all measurement points along the length of the dam body on any measurement profile are collected using magnetic field detection equipment. Traverse all measurement sections of the dam body and obtain the original magnetic field data of all measurement points corresponding to each measurement section.

4. The method for determining the seepage safety of earth-rock dams according to claim 1, characterized in that, The acquisition of all current density data at each measurement point in each measurement section includes: For any measurement section, acquire all current density data at a specific distance below the dam body from each measurement point in the vertical direction; The specific distance is determined based on the elevation difference between the measurement point and the dam's anti-seepage wall.

5. The method for determining the seepage safety of earth-rock dams according to claim 1, characterized in that, The step of obtaining the target wetting line corresponding to each measurement profile of the wetting surface includes: The immersion surface is divided according to the second preset interval to obtain all measurement profiles; Obtain all water level high points along the width of the dam in each measurement profile; Connect all the high water level points in the measured profile to obtain the target infiltration line corresponding to the measured profile.

6. A device for measuring the seepage safety of an earth-rock dam, characterized in that, include: The first acquisition unit is used to acquire the original magnetic field data of all measurement points along the length of the dam body in each measurement section by traversing all measurement sections of the dam body using a magnetic field detection device; the measurement section is determined based on the plane formed by the length direction and depth direction of the dam body. The second acquisition unit is used to perform two-dimensional inversion based on the target magnetic field data of all measurement points in each measurement section to acquire all current density data of each measurement point in each measurement section at different depths of the dam body; the target magnetic field data is the magnetic field component data of the original magnetic field data along the length direction of the dam body. Determination unit: used to calculate the vertical gradient based on all current density data of any measurement point, and determine the point with the largest gradient as the point with the largest current change of the measurement point; Traverse all measurement points in any measurement section and determine the point of maximum current change among all measurement points in the measurement section. Connect the points with the largest current changes at all measurement points to obtain the current density boundary line of the measurement section; Traverse all measurement sections and obtain the current density boundary lines for all measurement sections; The current density boundary lines of all measured sections are transformed in three dimensions to obtain the wetting surface of the dam body; Obtain the target phreatic line corresponding to each measured profile of the phreatic surface, wherein the measured profile is determined based on the plane formed by the width direction and the depth direction of the dam body; If the target infiltration line corresponding to any measurement profile is lower than the warning infiltration line, the measurement profile is determined to be in a safe state. If the target infiltration line corresponding to any measurement profile is equal to or higher than the warning infiltration line, and equal to or lower than the danger infiltration line, the measurement profile is determined to be in a state of safety doubt. If the target infiltration line corresponding to any measurement profile is higher than the danger infiltration line, the measurement profile is determined to be in a dangerous state. The warning infiltration line is determined based on the average of all first surface permeability coefficients. The first surface permeability coefficient is a first preset number of surface permeability coefficients obtained from all measuring points on the dam surface in ascending order of surface permeability coefficient. The danger infiltration line is determined based on the average of all second surface permeability coefficients, which are a second preset number of surface permeability coefficients obtained from all measuring points on the dam surface in descending order of surface permeability coefficient.

7. An electronic 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 method for determining the seepage safety of earth-rock dams as described in any one of claims 1-5.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for determining the seepage safety of earth-rock dams as described in any one of claims 1-5.

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