Tower pile foundation impact grounding resistance determination method, system, equipment, medium and product

Abstract

The invention relates to the technical field of electric power systems, and discloses a tower pile foundation impact grounding resistance determination method, system, device, medium and product, and the method comprises the steps: constructing a tower pile foundation grounding simulation model, and combining simulation conditions in a vertical placement scene and a horizontal placement scene to determine the tower pile foundation impact grounding resistance. Impact grounding resistance characteristics in a vertical placement scene and a horizontal placement scene are accurately simulated through a correction coefficient, a function relationship between the correction coefficient and the soil resistivity is established through data fitting, and the actual soil resistivity of the current to-be-measured tower pile foundation and the actual impact grounding resistance value in the horizontal placement scene are combined based on the fitting function relationship, so that the current to-be-measured tower pile foundation can be accurately measured. And the actual impact grounding resistance value of the current to-be-tested tower pile foundation in the vertical placement scene is obtained, so that the accurate equivalent evaluation of the impact grounding resistance under the vertical working condition is realized by using the convenience of the horizontal placement test.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a method, system, equipment, medium and product for determining the impulse grounding resistance of pole and tower foundations. Background Technology

[0002] In power transmission networks, pole and tower foundations not only serve as the structural support for overhead lines, but their buried portions also constitute a crucial part of the transmission system's grounding system. Proper grounding is essential for ensuring the safe and stable operation of the power system, preventing damage from lightning strikes and short-circuit currents, and protecting equipment and personnel. Therefore, accurately measuring the grounding resistance of pole and tower foundations is a vital and routine test in power engineering construction and operation.

[0003] Currently, the industry standard methods and theoretical models for measuring the grounding resistance of pole foundations are all based on their actual working state of being vertically buried in the soil. Traditional measurement techniques, such as the three-electrode method (potential drop method), assume that the pile foundation is a conductor that diffuses current vertically into the ground in terms of electrode arrangement, current field distribution model, and result interpretation. However, in actual testing, especially during the production, factory inspection, or random inspection of pile foundations after delivery to the construction site, vertically placing pile foundations several meters to over ten meters long and creating a soil environment that meets the measurement requirements presents significant challenges. This necessitates digging huge vertical tunnels or using specially designed test wells, resulting in stringent test site requirements, cumbersome configuration processes, low efficiency, and high costs. Summary of the Invention

[0004] In view of this, in order to solve the above-mentioned technical problems, the present invention provides a method, system, equipment, medium and product for determining the impact grounding resistance of tower pile foundations.

[0005] The first aspect of this invention provides a method for determining the impulse grounding resistance of a tower pile foundation, comprising:

[0006] Based on the geometric parameters of the tower and pile foundation and the soil environmental parameters, a grounding simulation model of the tower and pile foundation is constructed.

[0007] By combining the simulation conditions under vertical and horizontal placement scenarios, the boundary conditions of the pole pile foundation grounding simulation model are set respectively to obtain the simulation models under vertical and horizontal placement scenarios.

[0008] Based on the preset soil resistivity of each group, simulation calculations are performed on the simulation models under the vertical placement scenario and the horizontal placement scenario respectively to obtain the impact grounding resistance value of the tower pile foundation under the vertical placement scenario and the impact grounding resistance value under the horizontal placement scenario.

[0009] Numerical fitting was performed on the impact grounding resistance values ​​of pole and tower foundations under vertical and horizontal placement scenarios with multiple sets of soil resistivity to obtain a fitting function relationship between the correction coefficient and soil resistivity; wherein, the correction coefficient is the ratio of the impact grounding resistance value of the pole and tower foundation under vertical placement scenario to the impact grounding resistance value under horizontal placement scenario.

[0010] Based on the fitted function relationship, and combined with the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation under test under the vertical placement scenario is obtained.

[0011] Preferably, the construction of the grounding simulation model for the tower pile foundation based on the geometric parameters and soil environmental parameters of the tower pile foundation includes:

[0012] Based on the geometric dimensions, material properties, and soil environmental parameters of the tower and pile foundation, a three-dimensional geometric model of the tower and pile foundation is constructed.

[0013] Initial boundary conditions and mesh generation are set for the three-dimensional geometric model to obtain the simulation model of the tower pile foundation grounding.

[0014] Preferably, the boundary condition of the simulation model of the pole and pile foundation grounding in the vertical placement scenario is set to the resistivity of the overall pile foundation of the three-dimensional geometric model of the pole and pile foundation as the soil resistivity.

[0015] Preferably, the boundary conditions of the simulation model of the grounding of the pole and pile foundation in the horizontal placement scenario are set as follows: the conductivity of the upper half of the pile foundation in the three-dimensional geometric model of the pole and pile foundation is zero, the resistivity of the lower half of the pile foundation in the three-dimensional geometric model of the pole and pile foundation is soil resistivity, and the same infinite element boundary conditions are set around it.

[0016] Preferably, the step of performing simulation calculations on the simulation models for the vertical and horizontal placement scenarios based on each set of preset soil resistivity to obtain the impulse grounding resistance values ​​of the tower pile foundation in the vertical placement scenario and the impulse grounding resistance values ​​in the horizontal placement scenario includes:

[0017] For each set of preset soil resistivity, the preset soil resistivity is updated in the simulation models of the vertical placement scenario and the horizontal placement scenario, respectively.

[0018] Using a preset standard impulse current waveform as the excitation source, transient electromagnetic simulations were performed on the updated simulation models for both vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in both scenarios.

[0019] Preferably, the step of obtaining the actual impulse grounding resistance value of the current tower pile foundation under test in a vertical placement scenario based on the fitted function relationship, combined with the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value under a horizontal placement scenario, includes:

[0020] Based on the fitted function relationship and combined with the actual soil resistivity of the current tower pile foundation to be tested, the correction coefficient of the current tower pile foundation to be tested is determined;

[0021] Based on the correction coefficient of the current tower pile foundation to be tested and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation to be tested under the vertical placement scenario is determined.

[0022] Secondly, the present invention also provides a system for determining the impulse grounding resistance of tower pile foundations, comprising:

[0023] The simulation model building module is used to construct a grounding simulation model of the tower and pile foundation based on the geometric parameters and soil environmental parameters of the tower and pile foundation.

[0024] The boundary setting module is used to set the boundary conditions of the pole pile foundation grounding simulation model by combining the simulation conditions under the vertical placement scenario and the horizontal placement scenario, so as to obtain the simulation model under the vertical placement scenario and the horizontal placement scenario.

[0025] The resistance simulation calculation module is used to perform simulation calculations on the simulation models under the vertical placement scenario and the horizontal placement scenario based on each set of preset soil resistivity, so as to obtain the impact grounding resistance value of the tower pile foundation under the vertical placement scenario and the impact grounding resistance value under the horizontal placement scenario.

[0026] The function fitting module is used to perform numerical fitting on the impact grounding resistance values ​​of pole and pile foundations under vertical and horizontal placement scenarios based on multiple sets of soil resistivity, to obtain a fitting function relationship between the correction coefficient and the soil resistivity; wherein, the correction coefficient is the ratio of the impact grounding resistance value of the pole and pile foundation under vertical placement scenario to the impact grounding resistance value under horizontal placement scenario.

[0027] The grounding resistance calculation module is used to obtain the actual impact grounding resistance value of the current tower pile foundation under test in the vertical placement scenario based on the fitted function relationship, combined with the actual soil resistivity of the current tower pile foundation under test and the actual impact grounding resistance value under the horizontal placement scenario.

[0028] Thirdly, the present invention also provides an electronic device, the electronic device including a memory and a processor, the memory storing a computer program, the computer program being executed by the processor causing the processor to perform the steps of the method for determining the impact grounding resistance of pole pile foundations as described in the first aspect.

[0029] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed, implements the steps of the method for determining the impulse grounding resistance of tower pile foundations as described in the first aspect.

[0030] Fifthly, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, wherein when the program instructions are executed by a computer, the computer performs the steps of the method for determining the impact grounding resistance of a tower pile foundation as described in the first aspect.

[0031] As can be seen from the above technical solutions, this invention constructs a simulation model of the grounding of tower pile foundations and combines simulation conditions under vertical and horizontal placement scenarios to accurately simulate the impulse grounding resistance characteristics under both scenarios. Furthermore, it establishes a functional relationship between the correction coefficient and soil resistivity through data fitting. Based on this fitted functional relationship, and combining the actual soil resistivity of the tower pile foundation under test with the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the tower pile foundation under test under the vertical placement scenario is obtained. This leverages the convenience of horizontal placement testing to achieve an accurate equivalent evaluation of the impulse grounding resistance under vertical conditions, solving the limitations of vertical testing of long-sized pile foundations and the problem of distorted horizontal test results. It enables a convenient and accurate evaluation of the grounding performance of power system towers, thereby ensuring the stable and safe operation of the power system. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an application environment diagram of a method for determining the impulse grounding resistance of a tower pile foundation provided in an embodiment of the present invention;

[0034] Figure 2 A flowchart illustrating a method for determining the impulse grounding resistance of a tower pile foundation, provided in an embodiment of the present invention;

[0035] Figure 3 The simulation results of the vertical placement scenario provided in the embodiments of the present invention are shown in the figure.

[0036] Figure 4 The simulation results of a horizontally placed scenario provided in an embodiment of the present invention are shown in the figure.

[0037] Figure 5 Schematic diagrams of simulation results for various soil resistivity parameters provided in embodiments of the present invention;

[0038] Figure 6 This is a schematic diagram of the relational fitting results provided in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of a system for determining the impulse grounding resistance of a tower pile foundation, provided in an embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The method for determining the impulse grounding resistance of tower pile foundations provided in this application embodiment can be applied to, for example... Figure 1The application environment shown is illustrated. Terminal 101 communicates with server 102 via a network. A data storage system can store the data that server 102 needs to process. The data storage system can be integrated onto server 102, or it can be located in the cloud or on another network server. Terminal 101 or server 102 constructs a grounding simulation model of the tower pile foundation based on the geometric parameters and soil environmental parameters of the tower pile foundation. Combining the simulation conditions for vertical and horizontal placement scenarios, the boundary conditions of the grounding simulation model are set to obtain simulation models for both scenarios. Based on each set of preset soil resistivity, simulation calculations are performed on the simulation models for both scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in the vertical and horizontal placement scenarios. Numerical fitting is performed on the impulse grounding resistance values ​​of the tower pile foundation in the vertical and horizontal placement scenarios under multiple sets of different soil resistivity to obtain a fitting function relationship between the correction coefficient and the soil resistivity. The correction coefficient is the ratio of the impulse grounding resistance value of the tower pile foundation in the vertical placement scenario to the impulse grounding resistance value in the horizontal placement scenario. Based on the fitting function relationship, combined with the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value in the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation under test in the vertical placement scenario is obtained.

[0043] Terminal 101 can be, but is not limited to, various personal computers, laptops, smartphones, and tablets.

[0044] Server 102 can be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server that provides cloud computing services.

[0045] like Figure 2 As shown in the embodiments of this application, a method for determining the impulse grounding resistance of tower pile foundations is provided, which is then applied to... Figure 1 Taking terminal 101 or server 102 as an example, the explanation includes the following steps S1 to S5. Wherein:

[0046] Step S1: Based on the geometric parameters of the tower pile foundation and the soil environmental parameters, construct a grounding simulation model of the tower pile foundation.

[0047] The geometric parameters of the tower pile foundation include length, diameter, and burial depth, while the soil environmental parameters include soil resistivity and soil stratification. Finite element simulation software is used to model the electromagnetic environment of the tower pile foundation to ensure the model accurately reflects the actual working conditions. The soil resistivity is adjustable to accommodate simulation requirements under different geological conditions.

[0048] Step S2: Combining the simulation conditions under the vertical and horizontal placement scenarios, set the boundary conditions of the pole pile foundation grounding simulation model to obtain the simulation models under the vertical and horizontal placement scenarios.

[0049] In the vertical placement scenario, the pile foundation is completely buried in the soil along the vertical direction, and the current can be evenly distributed from its entire outer surface in all directions. In the horizontal placement scenario, the pile foundation is placed flat on the ground surface, with only the lower half in contact with the soil. The current distribution area is limited by the contact arc surface, and the upper half is exposed to the air, forming an insulating boundary. The difference in boundary conditions between the two scenarios leads to significantly different current field distributions, requiring precise setting of the boundary conditions for the tower pile foundation grounding simulation model.

[0050] Among them, the boundary condition of the simulation model of the grounding of the pole and pile foundation in the vertical placement scenario is set to the overall resistivity of the three-dimensional geometric model of the pole and pile foundation as the soil resistivity, so as to ensure that the current is evenly distributed from the pile foundation surface to the surrounding soil, simulating its vertical burial state under actual working conditions.

[0051] The boundary conditions of the simulation model of the grounding of the pole and pile foundation in the horizontal placement scenario are set as follows: the conductivity of the upper half of the three-dimensional geometric model of the pole and pile foundation is zero, and the resistivity of the lower half of the three-dimensional geometric model of the pole and pile foundation is the soil resistivity. The same infinite element boundary conditions are set around it to simulate the physical condition that the current only flows through the contact area between the lower half and the soil when the pile foundation is placed horizontally, so as to ensure that the simulation results truly reflect the current field distribution characteristics under the horizontal test state.

[0052] For example, with the earth's surface as the interface, the upper part is defined as the air medium (approximately insulating, with a minimum electrical conductivity), and the lower part is defined as the soil medium (with a resistivity of ρ).

[0053] In the scenario of horizontally placed pile foundations, the geometric position of the pile is set so that the upper half of the pile is located in the air domain and the lower half is located in the soil domain (in engineering implementation, this corresponds to the physical state of "semi-buried in shallow trench"). An insulating / no current normal outflow boundary is applied to the outer surface of the pile in contact with the air, and the current is allowed to continuously diffuse in the part of the pile in contact with the soil. The remaining outer boundaries are set with far-field / infinite domain equivalents to reduce the boundary influence.

[0054] In the scenario where the pile foundation is placed vertically, only the soil domain is set (resistivity is ρ), and the pile foundation axis is vertical; the outer surface of the pile (the part embedded in the soil) and the soil meet the current continuity condition, and the current flows to the surrounding soil.

[0055] Step S3: Based on the preset soil resistivity of each group, perform simulation calculations on the simulation models under the vertical placement scenario and the horizontal placement scenario respectively to obtain the impact grounding resistance value of the tower pile foundation under the vertical placement scenario and the impact grounding resistance value under the horizontal placement scenario.

[0056] Among them, soil resistivity is set as a variable parameter, such as the range of soil resistivity ρ from 50Ω·m to 2000Ω·m, covering typical geological conditions from low resistivity to high resistivity, for example: 50~150 Ω·m: clay / silty soil with high water content, moist cultivated soil, etc.; 150~500Ω·m: general silt, loam, moist sand / gravel soil; 500~1200Ω·m: relatively dry sand, gravelly sand, soil with thin weathering layer or low water content; 1200~2000Ω·m: dry gravel, strongly weathered rock and soil, shallow mountain surface with thin overburden, etc.

[0057] Through multiple simulation calculations under different soil resistivity conditions, a standard impulse current waveform (e.g., 8 / 20μs lightning current waveform) is applied to the pile foundation conductor. The impulse current flowing through the pile foundation and the pile foundation potential rise are calculated using the software's transient solver. Thus, the impulse grounding resistance values ​​of the pile foundation in the vertical placement scenario and the impulse grounding resistance values ​​in the horizontal placement scenario are obtained respectively.

[0058] Step S4: Based on multiple sets of impact grounding resistance values ​​of pole and tower foundations under different soil resistivity in vertical and horizontal placement scenarios, numerical fitting is performed to obtain the fitting function relationship between the correction coefficient and soil resistivity; where the correction coefficient is the ratio of the impact grounding resistance value of the pole and tower foundation in vertical placement scenario to the impact grounding resistance value in horizontal placement scenario.

[0059] Here, it is assumed that there are M sets of simulation data under different soil resistivity, with Represents the soil resistivity of the i-th group, in... This represents the correction coefficient corresponding to the soil resistivity of the i-th group. The calculation formula is:

[0060]

[0061] in, and Let represent the simulated impulse grounding resistance values ​​perpendicular to the horizontal under the i-th soil resistivity. Then, the correction coefficient... With soil resistivity The functional relationship can be expressed as:

[0062]

[0063] Using the least squares method, etc. Curve fitting was performed on the data set to obtain the relational expression. .

[0064] For example, such as Figures 3-4As shown, by applying a standard impulse current (8 / 20μs lightning current waveform) to the pile foundation conductor, the impulse current flowing through the pile foundation and the pile foundation potential rise are calculated using the transient solver of the software. This allows for the determination of the impulse grounding resistance of the pile foundation in a vertically placed state. and impulse grounding resistance in horizontal placement .

[0065] Simulations were conducted on different geological and soil environments with varying soil resistivity to obtain multiple sets of data. (See [link to relevant documentation]). Figure 5 The data was fitted, and the fitting results are as follows: Figure 6 As shown, the correction coefficient K after fitting is expressed as:

[0066]

[0067] Among them, such as Figure 6 As shown, the black squares represent the discrete data obtained from the simulation, the red solid line represents the cubic polynomial fitting curve, and the light red and dark red bands represent the 95% confidence interval and the 95% prediction interval, respectively. The fitting curve is... Effective within the range, goodness of fit , As can be seen from the figure. Follow There are slight nonlinear variations, but the range of variation is small and the fitting confidence interval is narrow, indicating that the calculation method of the correction coefficient after fitting has good engineering applicability.

[0068] Step S5: Based on the fitted function relationship, and combining the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation under test under the vertical placement scenario is obtained.

[0069] Specifically, based on the fitted function relationship and combined with the actual soil resistivity of the current tower pile foundation, the correction coefficient of the current tower pile foundation is determined; based on the correction coefficient of the current tower pile foundation and the actual impulse grounding resistance value in the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation in the vertical placement scenario is determined.

[0070] For example, the actual soil resistivity of the current tower pile foundation to be tested is substituted into the correction coefficient expression K to calculate the correction coefficient under the corresponding soil resistivity; the correction coefficient is multiplied by the impact grounding resistance value measured on site under the horizontal placement condition to obtain the impact grounding resistance value equivalent to that under the vertical installation condition, so as to achieve an accurate equivalent evaluation of the actual working condition.

[0071] For example, the measured value R of its horizontal impulse grounding resistance is measured through field engineering testing. h =50.394Ω, soil resistivity ρ site=1200, ρ site Substitute into the functional relationship model In the process, the specific correction coefficient K is calculated. site =0.722952713, obtained through the formula R v = K site × R h The corrected predicted value R of the impulse grounding resistance, equivalent to that in the vertical placement state, was calculated. v = 36.43247903. The actual measured impulse grounding resistance value when placed vertically is 36.253Ω. The correction value is basically consistent with the actual value, with an error of less than 1%.

[0072] It should be noted that this application embodiment constructs a simulation model of the grounding of the tower pile foundation and combines simulation conditions under vertical and horizontal placement scenarios to accurately simulate the impulse grounding resistance characteristics under vertical and horizontal placement scenarios. Then, a functional relationship between the correction coefficient and soil resistivity is established through data fitting. Based on the fitted functional relationship, combined with the actual soil resistivity of the tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the tower pile foundation under test under the vertical placement scenario is obtained. Thus, the convenience of horizontal placement testing is used to achieve an accurate equivalent evaluation of the impulse grounding resistance under vertical conditions, solving the limitations of vertical testing of long-sized pile foundations and the problem of distortion of horizontal test results. It can conveniently and accurately evaluate the grounding performance of power system towers, thereby ensuring the stable and safe operation of the power system.

[0073] In some embodiments, a grounding simulation model of the tower pile foundation is constructed based on the geometric parameters of the tower pile foundation and the soil environmental parameters, including: constructing a three-dimensional geometric model of the tower pile foundation based on the geometric structural dimensions, material properties and soil environmental parameters of the tower pile foundation; setting initial boundary conditions and meshing for the three-dimensional geometric model to obtain the grounding simulation model of the tower pile foundation.

[0074] The initial boundary conditions include infinite ground boundary conditions and symmetry boundary constraints. The excitation source is set as a standard lightning current waveform of 8 / 20μs. The electromagnetic field control equation is solved by the finite element method to realize the transient response simulation of the pile foundation in vertical and horizontal placement states, and to accurately extract the dynamic characteristics of the grounding resistance.

[0075] In some embodiments, based on each set of preset soil resistivity, simulation calculations are performed on simulation models for vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in the vertical placement scenario and the impulse grounding resistance values ​​in the horizontal placement scenario. This includes: updating the preset soil resistivity to the simulation models for vertical and horizontal placement scenarios for each set of preset soil resistivity; and running transient electromagnetic simulations based on a preset standard impulse current waveform as an excitation source in the updated simulation models for vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in the vertical and horizontal placement scenarios, respectively.

[0076] In this process, each set of preset soil resistivity is substituted into the simulation model, and the range of soil resistivity variation is systematically traversed to obtain multiple sets of corresponding vertical and horizontal impulse grounding resistance data, providing a complete data foundation for the subsequent quantitative analysis of correction coefficients.

[0077] Based on the simulation model of the tower pile foundation, the amplitude of the landmine current is assumed to be... The voltage amplitude it generates at the entry point is small. When current flows through the grounding electrode of the pile foundation, its corresponding potential equation can be expressed as:

[0078]

[0079] In the formula, , These are the currents flowing into the concrete pile foundation and the external grounding electrode, respectively. , These are the potentials generated by the current flowing through the concrete pile foundation and the external grounding electrode, respectively. , These are the self-impedances of the concrete pile foundation and the external grounding electrode, respectively. , These are the mutual impedances of the concrete pile foundation and the external grounding electrode, respectively. Generally, the mutual impedances are usually equal.

[0080] Calculation of power frequency grounding resistance for a single pile foundation The calculation formula is:

[0081]

[0082] In the formula, Soil resistivity; The resistivity of concrete; The length of the concrete deep well and the excavated pile foundation; The diameter of the concrete deep well and the excavated pile foundation; The diameter is the equivalent steel cylinder.

[0083] For a vertical grounding electrode with its top flush with the ground, the concrete pile foundation provides a self-resistance to the grounding electrode, which serves as a downward flow channel. The calculation formula is:

[0084]

[0085] In the formula, The length of the grounding electrode; The diameter of the vertical grounding electrode; This refers to soil resistivity.

[0086] In the numerical calculation of grounding resistance, the mutual impedance when current is dispersed between two conductor segments can be calculated using the Galerkin method of moments to replace the potential of the entire conductor segment with the average potential of each conductor segment. The mutual impedance between the two conductor segments can be expressed as:

[0087]

[0088] In the formula, Let be the mutual resistance coefficient. Assume that both the concrete pile foundation and the grounding electrode are in a uniform soil medium and are parallel. Establish a three-dimensional coordinate system with the top of the concrete pile foundation as the origin, and let the coordinates of the top endpoint of the grounding electrode be... mutual resistance coefficient It can be represented as:

[0089]

[0090] In summary, the grounding resistance of the pile foundation grounding electrode can be simplified as follows:

[0091]

[0092] In the formula, R is the grounding resistance of the pile foundation grounding body.

[0093] Based on the same inventive concept, this application also provides a system for determining the impulse grounding resistance of tower pile foundations to implement the above-mentioned method for determining the impulse grounding resistance of tower pile foundations.

[0094] The solution provided by this system is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the system for determining the impulse grounding resistance of tower pile foundations provided below can be found in the limitations of the method for determining the impulse grounding resistance of tower pile foundations described above, and will not be repeated here.

[0095] like Figure 7 As shown in the figure, this application provides a system for determining the impulse grounding resistance of tower pile foundations, including:

[0096] The simulation model construction module 100 is used to construct a grounding simulation model of the tower and pile foundation based on the geometric parameters and soil environmental parameters of the tower and pile foundation.

[0097] The boundary setting module 200 is used to set the boundary conditions of the pole pile foundation grounding simulation model by combining the simulation conditions under the vertical placement scenario and the horizontal placement scenario, so as to obtain the simulation model under the vertical placement scenario and the horizontal placement scenario.

[0098] The resistance simulation calculation module 300 is used to perform simulation calculations on the simulation models under vertical and horizontal placement scenarios based on each set of preset soil resistivity, and to obtain the impact grounding resistance value of the tower pile foundation under vertical placement scenario and the impact grounding resistance value under horizontal placement scenario.

[0099] The function fitting module 400 is used to perform numerical fitting on the impact grounding resistance values ​​of the tower pile foundation under vertical placement scenario and horizontal placement scenario based on multiple sets of different soil resistivity, and obtain the fitting function relationship between the correction coefficient and the soil resistivity; wherein, the correction coefficient is the ratio of the impact grounding resistance value of the tower pile foundation under vertical placement scenario to the impact grounding resistance value under horizontal placement scenario.

[0100] The grounding resistance calculation module 500 is used to obtain the actual impact grounding resistance value of the current tower pile foundation under test in the vertical placement scenario based on the fitted function relationship, combined with the actual soil resistivity of the current tower pile foundation under test and the actual impact grounding resistance value under the horizontal placement scenario.

[0101] In some embodiments, the simulation model building module 100 is used for:

[0102] Based on the geometric dimensions, material properties, and soil environmental parameters of the tower and pile foundation, a three-dimensional geometric model of the tower and pile foundation is constructed.

[0103] Initial boundary conditions and mesh generation were set for the three-dimensional geometric model to obtain the simulation model of the tower pile foundation grounding.

[0104] In some embodiments, the boundary condition of the simulation model of the grounding of the pole and pile foundation in a vertically placed scenario is set to the overall pile resistivity of the three-dimensional geometric model of the pole and pile foundation as the soil resistivity.

[0105] In some embodiments, the boundary conditions of the simulation model of the grounding of the pole and pile foundation in a horizontally placed scenario are set to have a preset upper half of the pile foundation with zero conductivity and a preset lower half of the pile foundation with soil resistivity, and the same infinite element boundary conditions are set around it.

[0106] In some embodiments, the resistance simulation calculation module 300 is used for:

[0107] For each set of preset soil resistivity, the preset soil resistivity is updated in the simulation models for both vertical and horizontal placement scenarios.

[0108] Using a preset standard impulse current waveform as the excitation source, transient electromagnetic simulations were performed on the updated simulation models for both vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in both scenarios.

[0109] In some embodiments, the grounding resistance calculation module 500 is used for:

[0110] Based on the fitted function relationship and combined with the actual soil resistivity of the current tower pile foundation, the correction coefficient of the current tower pile foundation is determined.

[0111] Based on the correction coefficient of the current tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, determine the actual impulse grounding resistance value of the current tower pile foundation under test under the vertical placement scenario.

[0112] like Figure 8 As shown, this application provides an electronic device. The electronic device 10 includes a memory 20 and a processor 30. The memory 20 stores a computer program. When the computer program is executed by the processor 30, the processor 30 performs the steps of the method for determining the impact grounding resistance of the tower pile foundation as described in the above embodiment.

[0113] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed, implements the steps of the method for determining the impulse grounding resistance of tower pile foundations as described in the above embodiments.

[0114] This application provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer performs the steps of the method for determining the impact grounding resistance of tower pile foundations as described in the above embodiments.

[0115] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, electronic devices, computer storage media, and computer program products described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0116] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0117] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0118] In the several embodiments provided by this invention, it should be understood that the disclosed systems, electronic devices, computer storage media, computer program products, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between devices or units, and may be electrical, mechanical, or other forms.

[0119] 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 units can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0121] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or 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 for executing all or part of the steps of the methods described in the various embodiments of the present invention through a computer device (which may be a personal computer, a server, or a network device, etc.). The aforementioned storage medium includes: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media capable of storing program code.

[0122] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. 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. Such 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 impulse grounding resistance of a tower pile foundation, characterized in that, include: Based on the geometric parameters of the tower and pile foundation and the soil environmental parameters, a grounding simulation model of the tower and pile foundation is constructed. By combining the simulation conditions under vertical and horizontal placement scenarios, the boundary conditions of the pole pile foundation grounding simulation model are set respectively to obtain the simulation models under vertical and horizontal placement scenarios. Based on the preset soil resistivity of each group, simulation calculations are performed on the simulation models under the vertical placement scenario and the horizontal placement scenario respectively to obtain the impact grounding resistance value of the tower pile foundation under the vertical placement scenario and the impact grounding resistance value under the horizontal placement scenario. Numerical fitting was performed on the impact grounding resistance values ​​of pole and tower foundations under vertical and horizontal placement scenarios with multiple sets of soil resistivity to obtain a fitting function relationship between the correction coefficient and soil resistivity; wherein, the correction coefficient is the ratio of the impact grounding resistance value of the pole and tower foundation under vertical placement scenario to the impact grounding resistance value under horizontal placement scenario. Based on the fitted function relationship, and combined with the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation under test under the vertical placement scenario is obtained.

2. The method for determining the impulse grounding resistance of tower pile foundations according to claim 1, characterized in that, The grounding simulation model of the tower pile foundation is constructed based on the geometric parameters and soil environmental parameters of the tower pile foundation, including: Based on the geometric dimensions, material properties, and soil environmental parameters of the tower and pile foundation, a three-dimensional geometric model of the tower and pile foundation is constructed. Initial boundary conditions and mesh generation are set for the three-dimensional geometric model to obtain the simulation model of the tower pile foundation grounding.

3. The method for determining the impulse grounding resistance of tower pile foundations according to claim 1, characterized in that, The boundary condition of the simulation model of the grounding of the pole and pile foundation in the vertical placement scenario is set as the resistivity of the overall pile foundation of the three-dimensional geometric model of the pole and pile foundation and the soil resistivity.

4. The method for determining the impulse grounding resistance of tower pile foundations according to claim 1, characterized in that, The boundary conditions of the simulation model of the grounding of the pole and pile foundation in the horizontal placement scenario are set as follows: the conductivity of the upper half of the pile foundation in the three-dimensional geometric model of the pole and pile foundation is zero, the resistivity of the lower half of the pile foundation in the three-dimensional geometric model of the pole and pile foundation is soil resistivity, and the same infinite element boundary conditions are set around it.

5. The method for determining the impulse grounding resistance of tower pile foundations according to claim 1, characterized in that, Based on the preset soil resistivity for each group, simulation calculations are performed on the simulation models for both vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in the vertical placement scenario and the impulse grounding resistance values ​​in the horizontal placement scenario, including: For each set of preset soil resistivity, the preset soil resistivity is updated in the simulation models of the vertical placement scenario and the horizontal placement scenario, respectively. Using a preset standard impulse current waveform as the excitation source, transient electromagnetic simulations were performed on the updated simulation models for both vertical and horizontal placement scenarios to obtain the impulse grounding resistance values ​​of the tower pile foundation in both scenarios.

6. The method for determining the impulse grounding resistance of tower pile foundations according to claim 1, characterized in that, Based on the fitted function relationship, and combining the actual soil resistivity of the current tower pile foundation under test and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation under test under the vertical placement scenario is obtained, including: Based on the fitted function relationship and combined with the actual soil resistivity of the current tower pile foundation to be tested, the correction coefficient of the current tower pile foundation to be tested is determined; Based on the correction coefficient of the current tower pile foundation to be tested and the actual impulse grounding resistance value under the horizontal placement scenario, the actual impulse grounding resistance value of the current tower pile foundation to be tested under the vertical placement scenario is determined.

7. A system for determining the impulse grounding resistance of tower pile foundations, characterized in that, include: The simulation model building module is used to construct a grounding simulation model of the tower and pile foundation based on the geometric parameters and soil environmental parameters of the tower and pile foundation. The boundary setting module is used to set the boundary conditions of the pole pile foundation grounding simulation model by combining the simulation conditions under the vertical placement scenario and the horizontal placement scenario, so as to obtain the simulation model under the vertical placement scenario and the horizontal placement scenario. The resistance simulation calculation module is used to perform simulation calculations on the simulation models under the vertical placement scenario and the horizontal placement scenario based on each set of preset soil resistivity, so as to obtain the impact grounding resistance value of the tower pile foundation under the vertical placement scenario and the impact grounding resistance value under the horizontal placement scenario. The function fitting module is used to perform numerical fitting on the impact grounding resistance values ​​of pole and pile foundations under vertical and horizontal placement scenarios based on multiple sets of soil resistivity, to obtain a fitting function relationship between the correction coefficient and the soil resistivity; wherein, the correction coefficient is the ratio of the impact grounding resistance value of the pole and pile foundation under vertical placement scenario to the impact grounding resistance value under horizontal placement scenario. The grounding resistance calculation module is used to obtain the actual impact grounding resistance value of the current tower pile foundation under test in the vertical placement scenario based on the fitted function relationship, combined with the actual soil resistivity of the current tower pile foundation under test and the actual impact grounding resistance value under the horizontal placement scenario.

8. An electronic device, characterized in that, The electronic device includes a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor performs the steps of the method for determining the impact grounding resistance of pole pile foundations as described in any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed, it implements the steps of the method for determining the impact grounding resistance of pole and tower foundations as described in any one of claims 1-6.

10. A computer program product, characterized in that, The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, wherein when the program instructions are executed by a computer, the computer performs the steps of the method for determining the impact grounding resistance of a tower pile foundation as described in any one of claims 1-6.

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