Concrete frost resistance grade prediction method and system for alpine region implementing digital power grid

Abstract

The application provides a kind of implementation digital power grid's high-cold area concrete frost resistance grade prediction method and system, related to power grid engineering construction and digital state evaluation technical field.The method obtains the environmental basic parameters of transmission line tower site and laboratory fast freezing parameters;Combined with temperature parameters and tower site area characteristics, the number of regional annual natural freeze-thaw cycles is calculated;Introducing moisture related parameters and cooling rate difference for multi-factor correction, the approximate real equivalent freeze-thaw cycle number is obtained;Then the on-site frost resistance grade and the minimum concrete strength requirement for guiding construction are calculated;Finally, through condition comparison, it is evaluated whether the initial design of the project meets the on-site compliance requirements.The application breaks through the limitations of traditional experience evaluation, accurately quantifies the freeze-thaw damage based on multi-dimensional micro-meteorological data, scientifically guides the concrete proportioning and maintenance construction, effectively prevents early frost damage and erosion, and thus ensures the high-quality construction and long-term safe operation of high-cold power grid infrastructure in extreme environment.

Description

Technical Field

[0001] This invention relates to the field of power grid engineering construction and digital condition assessment technology, and more specifically, to a method and system for predicting the frost resistance level of concrete in cold regions for digital power grids. Background Technology

[0002] As a crucial physical support structure for the entire power grid system, transmission line foundations play a vital role in transmitting tower loads and maintaining the spatial orientation of the lines. Their construction quality and long-term durability directly impact the absolute safety of power grid operation. As power grid construction extends into high-altitude and frigid regions, the natural environment surrounding transmission line foundations becomes increasingly harsh. In these regions, frequent wet-dry cycles and extreme diurnal temperature variations expose concrete structures to severe freeze-thaw cycles. When ambient temperatures drop below freezing, water seeping into the micropores of the concrete freezes and expands, generating significant expansion stress on the pore walls. When temperatures rise and the ice melts, water further penetrates the concrete. This continuous freeze-thaw cycle leads to the continuous initiation and expansion of microcracks within the concrete, resulting in severe macroscopic defects such as surface cracking, spalling, and pitting, causing a sharp decline in the load-bearing capacity and durability of the foundation structure.

[0003] Facing the complex environmental challenges of high-altitude and cold regions, the existing design and construction processes for the frost resistance of transmission line foundation concrete still face significant technical bottlenecks. Currently, the engineering community mainly relies on macroscopic standard experience or laboratory standard rapid freezing tests to evaluate the frost resistance of concrete. However, laboratory standard rapid freezing conditions often employ fixed cooling rates and ideal water saturation states, which differ greatly from the actual cooling rates, real relative humidity environments, and complex precipitation conditions experienced at construction sites in high-altitude and cold regions. Because the microclimates of different tower locations vary in high-altitude and cold regions, construction sites typically lack the conditions for long-term freeze-thaw level measurements. Traditional one-size-fits-all experience cannot accurately reflect the actual freeze-thaw damage experienced by concrete in specific areas. This disconnect between the laboratory environment and the complex on-site conditions results in a lack of scientific and precise data support for concrete mix design.

[0004] Due to the lack of precise freeze-thaw prediction methods for the on-site microenvironment, current engineering practices often face a dilemma: either blindly increasing the freeze-thaw resistance of concrete in pursuit of absolute safety, leading to a huge waste of building materials and an unnecessary increase in project costs; or underestimating the severity of the on-site freeze-thaw environment, resulting in severe freeze-thaw erosion damage to the poured concrete foundations shortly after commissioning. These early defects not only significantly increase the later operation, maintenance, and reinforcement costs of the power grid, but also create hidden dangers of structural instability, posing a serious challenge to the long-term life-cycle management of the power grid. Therefore, there is an urgent need in this field for a technical solution that breaks away from the reliance on ideal parameters and subjective experience in traditional laboratories. A digital prediction method is needed that can deeply couple various actual environmental factors such as real-time weather temperature, precipitation probability, cooling rate, and humidity characteristics to accurately calculate freeze-thaw cycle assessment indicators equivalent to those on-site. This would scientifically guide the design, construction, and maintenance of the freeze-thaw resistance of transmission line foundation concrete, fundamentally ensuring the high-quality construction and long-term safe operation of power grid infrastructure in high-altitude and cold regions. Summary of the Invention

[0005] The present invention aims to solve at least one of the aforementioned technical problems existing in the prior art.

[0006] Therefore, the first aspect of the present invention provides a method for predicting the frost resistance level of concrete in cold regions for realizing digital power grids.

[0007] The second aspect of this invention provides a system for predicting the frost resistance level of concrete in cold regions to realize digital power grids.

[0008] This invention provides a method for predicting the frost resistance grade of concrete in high-altitude and cold regions for digital power grids, comprising: S1. Obtain basic environmental parameters and laboratory rapid freezing parameters for the area where the transmission line tower is located; S2. Based on the temperature parameter in the environmental basic parameters and the regional characteristics of the tower location, select the corresponding regional freeze-thaw cycle calculation criteria and calculate the average annual number of natural freeze-thaw cycles in the region. S3. Based on the moisture-related parameters, cooling rate parameters and laboratory rapid freezing parameters in the environmental basic parameters, the annual average number of natural freeze-thaw cycles in the region is corrected by multiple factors to obtain the on-site equivalent number of freeze-thaw cycles. S4. Based on the equivalent freeze-thaw cycle number and the design service life of the transmission line, calculate the freeze-thaw resistance grade of the concrete on site and the minimum concrete strength required to meet the site requirements. S5. Obtain the design frost resistance grade and design concrete strength, and compare them with the frost resistance grade of the on-site concrete and the minimum concrete strength, respectively, to assess whether the current design conditions meet the on-site requirements.

[0009] The method for predicting the frost resistance level of concrete in high-altitude and cold regions according to the above-described technical solution of the present invention may also have the following additional technical features: In the above technical solution, the regional freeze-thaw cycle calculation criteria include: When the tower is located in a plain area with temperatures below 0°C, the calculation methods for the average annual number of natural freeze-thaw cycles in the area include:

[0010] When the tower is located in a plain area with a temperature above 0°C, the calculation methods for the average annual number of natural freeze-thaw cycles in the area include:

[0011] in, This indicates the average number of natural freeze-thaw cycles per year in the region; This indicates the average temperature of the coldest month in the area related to the route.

[0012] In the above technical solution, the regional freeze-thaw cycle calculation criterion also includes: When the tower is located in a plateau region, the methods for calculating the average annual number of natural freeze-thaw cycles in the region include:

[0013] in, This indicates the average number of natural freeze-thaw cycles per year in the region; This indicates the average temperature of the coldest month in the area related to the route.

[0014] In the above technical solution, the method for calculating the on-site equivalent freeze-thaw cycle number includes:

[0015] in, Indicates the equivalent number of freeze-thaw cycles on-site; This represents the regional concrete saturation time ratio coefficient, which is the frequency of the number of days with precipitation greater than or equal to a set threshold during the freeze-thaw cycle. This indicates the average relative humidity during the on-site freeze-thaw cycle. This represents the average relative humidity over the time of the freeze-thaw cycle in the region; The cooling rate under standard laboratory rapid freezing conditions; The average annual cooling rate during a freeze-thaw cycle at the site; This indicates the average number of natural freeze-thaw cycles per year in the region.

[0016] In the above technical solution, the calculation method for the frost resistance grade of the on-site concrete includes:

[0017] Where F represents the freeze-thaw resistance grade of the concrete on site; Indicates the equivalent number of freeze-thaw cycles on-site; This indicates the design service life of the transmission line.

[0018] In the above technical solution, the method for calculating the minimum concrete strength required to meet site conditions includes: The minimum concrete strength required to meet on-site requirements is determined based on the frost resistance grade of the concrete at the site.

[0019] in, This indicates the minimum concrete strength required to meet on-site freeze-thaw resistance requirements.

[0020] In the above technical solution, the assessment of whether the current design conditions meet the site requirements includes: Determine whether the design freeze resistance rating is met:

[0021] Determine whether the designed concrete strength meets the requirements:

[0022] Where F represents the freeze-thaw resistance grade of the concrete on site; Indicates the design freeze resistance rating; Indicates the design concrete strength; This indicates the minimum concrete strength required to meet on-site frost resistance requirements; If both the design frost resistance grade and the design concrete strength meet the requirements, then the design conditions are deemed to meet the site requirements; otherwise, the design conditions are deemed not to meet the site requirements.

[0023] The above technical solution, after completing the evaluation of the current design conditions, also includes: The evaluation results based on the design conditions will output a prediction result report, which will be in electronic document format.

[0024] This invention provides a system for predicting the frost resistance level of concrete in high-altitude and cold regions for implementing digital power grids, used to achieve the method described in any of the above technical solutions, the system comprising: An environmental information database is used to store regional environmental parameters; Design information database, used to store line design parameters; The Concrete Freeze-Thaw Resistance Grade Prediction Center is used to call upon the criterion library and perform calculations and evaluations of freeze-thaw resistance grade and strength. A regional freeze-thaw cycle calculation criterion library is used to provide the calculation logic for natural freeze-thaw cycles; A database of on-site frost resistance rating assessment criteria is provided to offer equivalent cycles and strength conversion logic. A GUI window is used to display evaluation results and color warnings; The output terminal is used to generate and export prediction report files.

[0025] In the above technical solution, the concrete frost resistance level prediction center reads data from the environmental information database and the design information database, calls the regional freeze-thaw cycle calculation criterion database and the on-site frost resistance level assessment criterion database, calculates the frost resistance level and minimum concrete strength requirements of the on-site concrete, and generates corresponding concrete mix design requirements and curing measures suggestions based on the calculation results.

[0026] In summary, due to the adoption of the above-mentioned technical features, the beneficial effects of the present invention are: This invention overcomes the limitations of existing engineering practices that heavily rely on macroscopic subjective experience or ideal parameters from a single laboratory setting, and innovatively proposes a multi-factor coupled freeze-thaw cycle prediction model. By comprehensively acquiring multi-dimensional basic meteorological data such as the actual meteorological temperature, water saturation time ratio, ambient humidity, and actual cooling rate of the area where the transmission line tower is located, and comparing and correcting these data with standard laboratory rapid freezing conditions, this invention achieves a precise mapping from macroscopic regional natural freeze-thaw cycles to microscopic equivalent freeze-thaw cycles on-site. This quantitative calculation method based on the real physical environment on-site can deeply reproduce the complex alternation of dry and wet conditions and the real dramatic temperature changes in high-altitude and cold regions, thereby significantly improving the scientific rigor and accuracy of predicting the freeze-thaw resistance level of transmission line concrete foundations.

[0027] Furthermore, based on accurate predictions of the equivalent freeze-thaw cycle count in the field, this invention can directly derive the required freeze-thaw resistance grade and minimum strength requirements for concrete in the field, providing reliable data support for the concrete mix design, construction, and maintenance of power transmission foundations in cold regions. This quantitative evaluation mechanism effectively avoids the waste of building materials and cost increases caused by blindly increasing the grade in traditional one-size-fits-all designs, while also mitigating the risk of early freeze-thaw damage such as surface cracking and spalling due to insufficient design. This method fundamentally reduces the later operation, maintenance, and reinforcement costs of the power grid, significantly improving the durability and absolute safety of the power grid foundation structure under extreme climate conditions throughout its life cycle.

[0028] Furthermore, this invention provides a highly integrated digital assessment system. By fusing underlying data from environmental and design information databases, combined with efficient automatic calculations in the back-end prediction center and intuitive color-coded warnings in the front-end GUI interface, it automates and visualizes the entire process of reviewing compliance with freeze-thaw resistance design standards. The system can ultimately export standardized electronic document prediction reports with a single click, significantly reducing the complex calculation burden on engineering technicians and the probability of human error. It also significantly improves the response speed of on-site construction technical briefings and the efficiency of engineering design, providing a powerful technical tool to ensure the high-quality and refined construction of digital power grids in high-altitude and cold regions.

[0029] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart of a method for predicting the frost resistance level of concrete in high-altitude and cold regions according to an embodiment of the present invention; Figure 2 A schematic diagram of the execution logic of a system for predicting the frost resistance level of concrete in high-altitude and cold regions, based on an embodiment of the present invention. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0033] The following reference Figure 1 and Figure 2 This invention describes a method and system for predicting the frost resistance level of concrete in cold regions to realize digital power grids, provided by some embodiments of the present invention.

[0034] Some embodiments of this application provide a method for predicting the frost resistance level of concrete in cold regions for realizing digital power grids.

[0035] The first embodiment of this invention proposes a method for predicting the frost resistance level of concrete in high-altitude and cold regions for digital power grids. The core technical concept of this method lies in deeply integrating real micro-meteorological environmental elements at transmission line tower sites with standardized laboratory test parameters through digital means. This constructs a multi-factor coupled prediction mechanism that can accurately reflect the actual degree of frost damage to concrete foundations under high-altitude and cold conditions. Addressing the problem that traditional empirical methods or single ideal test conditions cannot reproduce the complex alternating stresses such as alternating wet and dry conditions, drastic temperature and humidity fluctuations, and actual cooling rates at specific tower sites, this method comprehensively collects and digitally quantifies key physical environmental quantities such as temperature, humidity, precipitation frequency, and the rate of thermal alternation in a specific tower site area. It also introduces a multivariate correction model that includes water time, temperature-humidity ratio, and differences in cooling rates. This accurately converts macroscopic natural freeze-thaw damage into quantitative indicators corresponding to the equivalent damage characteristics at specific sites, thereby achieving a scientific assessment of frost resistance level and minimum strength requirements. This digital, compliant closed-loop verification directly guides the on-site mix design, curing construction, and life-cycle durability management of concrete.

[0036] Specifically, such as Figure 1 As shown, the method includes the following steps S1-S5.

[0037] S1. Obtain basic environmental parameters and laboratory rapid freezing parameters for the area where the transmission line tower is located; S2. Based on the temperature parameter in the environmental basic parameters and the regional characteristics of the tower location, select the corresponding regional freeze-thaw cycle calculation criteria and calculate the average annual number of natural freeze-thaw cycles in the region. S3. Based on the moisture-related parameters, cooling rate parameters and laboratory rapid freezing parameters in the environmental basic parameters, the annual average number of natural freeze-thaw cycles in the region is corrected by multiple factors to obtain the on-site equivalent number of freeze-thaw cycles. S4. Based on the equivalent freeze-thaw cycle number and the design service life of the transmission line, calculate the freeze-thaw resistance grade of the concrete on site and the minimum concrete strength required to meet the site requirements. S5. Obtain the design frost resistance grade and design concrete strength, and compare them with the frost resistance grade of the on-site concrete and the minimum concrete strength, respectively, to assess whether the current design conditions meet the on-site requirements.

[0038] Regarding the process of obtaining the basic environmental parameters and laboratory rapid freezing parameters of the area where the transmission line tower is located in step S1, in some embodiments, in order to comprehensively and realistically reflect the potential impact of the complex micro-meteorological environment of high-altitude and cold regions on concrete structures, the basic environmental parameters obtained specifically cover multiple dimensions of meteorological and environmental characteristics.

[0039] Specifically, the environmental baseline parameters include the average temperature of the coldest month in the region related to the transmission line and the average relative humidity during the freeze-thaw cycle, which characterize the macro-climate of the region. They also include the average relative humidity during the freeze-thaw cycle and the average annual cooling rate during freeze-thaw cycles at the transmission line tower sites, which characterize the local micro-environment of the area. Additionally, specific precipitation data characterize the water saturation state of the concrete in the region. Furthermore, the laboratory rapid freezing parameters mainly refer to the cooling rate under standard laboratory rapid freezing conditions. These parameters are typically obtained through on-site measurements in a standard curing laboratory, aiming to provide a standardized comparative reference benchmark for subsequent on-site equivalent assessments.

[0040] In one specific embodiment, regarding the acquisition of the aforementioned parameters, engineers can obtain long-term regional-level temperature, humidity, and precipitation background data by retrieving historical meteorological statistics from the local meteorological station. Simultaneously, they can combine this with on-site measurements of microenvironmental characteristics collected from meteorological monitoring terminals deployed at each specific tower location along the transmission line. This step, through the collection and integration of multi-source data, constructs a fundamental data input pool reflecting the actual temperature fluctuations and humidity changes at the engineering site. This lays the necessary data foundation for subsequent accurate quantification of the equivalent freeze-thaw cycle damage, effectively avoiding the engineering technical shortcomings of traditional experience-based methods, which often suffer from single-dimensional parameter acquisition and significant detachment from the actual on-site environment.

[0041] Regarding step S2, which involves selecting the corresponding regional freeze-thaw cycle calculation criteria based on the temperature parameters in the environmental baseline parameters and the characteristics of the area where the tower is located, and calculating the average annual number of natural freeze-thaw cycles in the region, in some embodiments, considering the significant differences in meteorological evolution patterns and freeze-thaw mechanisms at different geographical locations and altitudes in high-altitude and cold regions, this invention refines the matching of different calculation models by comprehensively judging the geographical characteristics and environmental temperature parameters of the area where the tower is located. To avoid overlapping numerical ranges when applying calculation models to different climate zones and to accurately characterize the natural freeze-thaw damage patterns under various typical terrains, this invention clearly divides the area where the tower is located into plains below 0℃, plains above 0℃, and plateau areas, and assigns targeted regional freeze-thaw cycle calculation criteria to each.

[0042] In one specific embodiment, the temperature parameter among the environmental baseline parameters is specifically selected as the average temperature of the coldest month in the relevant area of ​​the line. When it is determined that the area where the tower is located is a plain area with a temperature below 0°C, the system or calculation logic selects the first calculation criterion, and the specific calculation formula for the average annual number of natural freeze-thaw cycles in the area is as follows:

[0043] When it is determined that the area where the tower is located is a plain area with a temperature above 0°C, the second calculation criterion is selected. The specific formula for calculating the average annual number of natural freeze-thaw cycles in the area is as follows:

[0044] When it is confirmed that the area where the tower is located is a plateau region (specifically encompassing typical high-altitude areas such as western Sichuan, Tibet, and the Qinghai-Tibet Plateau), the third calculation criterion is selected. The specific formula for calculating the average annual number of natural freeze-thaw cycles in the region is as follows:

[0045] In the above formula, This indicates the average number of natural freeze-thaw cycles per year in the region, expressed in cycles. This indicates the average temperature of the coldest month in the area related to the route, expressed in °C.

[0046] Through the aforementioned targeted calculation mechanism based on different regions and temperature ranges, this scheme effectively overcomes the drawbacks of traditional assessment methods that blindly apply a "one-size-fits-all" approach due to a lack of differentiation in altitude and topographical features. This calculation criterion, based on both specific locational characteristics and the average temperature of the coldest month, not only eliminates assessment biases caused by overlapping model applicability ranges but also more objectively and accurately quantifies the annual average freeze-thaw cycle baseline under macroscopic natural conditions in the target tower location area. This lays a solid quantitative benchmark for subsequently introducing on-site microenvironment correction factors and obtaining accurate on-site equivalent freeze-thaw cycle numbers.

[0047] The process in step S3 involves multi-factor correction of the annual average number of natural freeze-thaw cycles in the region based on the environmental baseline parameters, including moisture-related parameters, cooling rate parameters, and laboratory rapid freezing parameters, to obtain the equivalent number of freeze-thaw cycles on-site. In some embodiments, considering the complex microclimate characteristics of high-altitude and cold regions, the base number of natural freeze-thaw cycles calculated solely based on temperature parameters cannot fully and accurately reflect the actual damage caused to the concrete foundation by alternating wet and dry conditions and drastic temperature changes on-site. Moisture is the material basis for frost heave damage, while the severity of cooling directly affects the accumulation and release of internal freezing stress. Therefore, this embodiment constructs a comprehensive correction model that includes the proportion of saturated time, relative humidity ratio, and differences in cooling rate. Moisture conditions and the severity of cooling are used as core correction factors in the calculation, scientifically correcting the macroscopic natural freeze-thaw cycle through multiple factors to most accurately approximate the actual physical damage conditions at the transmission tower site.

[0048] In one specific embodiment, the method for calculating the on-site equivalent freeze-thaw cycle count is as follows:

[0049] in, represents the number of on-site equivalent freeze-thaw cycles obtained after correction calculation, the unit is cycles; represents the proportional coefficient of saturated water time of regional concrete, whose value is the frequency of precipitation days with precipitation greater than or equal to the set threshold during the freeze-thaw cycle. Its physical significance is to reflect the frequency probability that environmental precipitation promotes concrete to reach a high water-saturated state susceptible to freeze-thaw damage, and the specific value is the frequency of precipitation days with precipitation greater than or equal to the set threshold during the freeze-thaw cycle. As a preferred embodiment, the set threshold is 0.1 mm; represents the average relative humidity during the on-site freeze-thaw cycle; represents the average relative humidity during the regional freeze-thaw cycle; is the cooling rate under the standard rapid freezing condition in the laboratory, which is usually measured and obtained by the on-site standard curing laboratory supporting the project under standard operation, with the unit of ℃ / h; is the annual average cooling rate when freeze-thaw cycles occur on site, with the unit of ℃ / h; represents the annual average number of natural freeze-thaw cycles in the region calculated through the preceding step S2.

[0050] By introducing the nonlinear ratio feature composed of on-site measured cooling rate and laboratory standard cooling rate, as well as the ratio feature of on-site and regional humidity, this calculation formula accurately quantifies the coupled amplification or reduction effect of on-site precipitation frequency and temperature mutation on the frost heave stress inside the concrete structure, thereby providing equivalent cycle index support closest to the on-site in-situ environment for the subsequent accurate assessment of frost resistance grade and material strength.

[0051] Directed at the process of step S4 of calculating the frost resistance grade of on-site concrete and the minimum concrete strength meeting on-site requirements according to the number of on-site equivalent freeze-thaw cycles and the designed service life of the transmission line. In some embodiments, the frost resistance durability of engineering facilities depends not only on the annual environmental damage degree, but also is closely related to the expected service life of the overall structure. After obtaining the number of equivalent freeze-thaw cycles that accurately reflect the characteristics of the on-site microenvironment, this embodiment cumulatively calculates it and the service life of the line in the time dimension, aiming to objectively quantify the total frost heave damage that the foundation structure needs to withstand during the entire life cycle, and then scientifically map it to the frost resistance grade and strength index in engineering materials.

[0052] In a specific embodiment, the calculation method of the frost resistance grade of the on-site concrete specifically adopts the following formula:

[0053] Wherein, F represents the frost resistance grade of the on-site concrete; represents the number of on-site equivalent freeze-thaw cycles; This indicates the design service life of a transmission line, expressed in years. In actual power grid construction, to ensure the long-term safety of the backbone network, this design service life parameter is usually set to no less than 50 years.

[0054] Furthermore, since the frost resistance of concrete structures exhibits a significant positive correlation with their density and compressive strength, this disclosure, after obtaining the frost resistance grade, further derives the corresponding minimum strength. The specific formula for calculating the minimum concrete strength required to meet site conditions is as follows:

[0055] in, This indicates the minimum concrete strength required to meet on-site frost resistance requirements, expressed in MPa.

[0056] Through the aforementioned explicit quantitative conversion mechanism, this embodiment transforms the equivalent cycle number from meteorological and environmental perspectives into material design indicators directly applicable in civil engineering construction. It should be noted that after obtaining the minimum concrete strength and frost resistance grade indicators derived from the above scientific calculations, further work based on these strength indicators, such as adjusting the concrete water-cement ratio, optimizing admixtures, and formulating on-site insulation and curing measures, is all work that can be performed by those skilled in the art based on existing professional knowledge. The implementation of this step provides an objective and accurate benchmark for subsequently determining the compliance of engineering design parameters, completely breaking down the technical barriers between high-altitude microclimate environment prediction and actual engineering material performance requirements.

[0057] Step S5 involves obtaining the design frost resistance grade and design concrete strength, and then comparing them with the frost resistance grade of the on-site concrete and the minimum concrete strength to assess whether the current design conditions meet the on-site requirements. In some embodiments, to achieve closed-loop verification of frost resistance design compliance and to provide intuitive guidance for on-site engineering construction, this method introduces a rigorous condition comparison and dual evaluation mechanism. The core of this evaluation process is to examine whether the initial material design parameters in the early stages of the power transmission project can adequately encompass and withstand the extreme working conditions of the high-altitude and cold-weather site scientifically calculated in the aforementioned steps, thereby theoretically avoiding potential construction hazards.

[0058] In one specific embodiment, the evaluation of whether the current design conditions meet the site requirements specifically includes the following determination logic: Obtain the design frost resistance level and design concrete strength proposed in the early stages of the power transmission line project.

[0059] Determine whether the designed frost resistance rating meets the formula:

[0060] Simultaneously, determine whether the designed concrete strength meets the formula:

[0061] In the above judgment formula, F represents the frost resistance grade of the on-site concrete obtained through multi-factor correction calculation; This indicates the pre-defined design frost resistance level for the project; This indicates the pre-defined design concrete strength for the project; This represents the minimum concrete strength calculated to meet on-site frost resistance requirements. After the above comparison, if both the design frost resistance grade and the design concrete strength meet the requirements of the above two formulas, the system determines that the current design conditions have sufficient safety margin, that is, the design conditions meet the on-site requirements; otherwise, if any one of them is not met, the system determines that the current design conditions do not meet the on-site requirements, and thus prompts the engineering designers to upgrade the design grade of the foundation concrete or to re-verify the mix proportion.

[0062] In some embodiments, after completing the assessment of the current design conditions, the method further includes a process of generating and outputting a prediction result report based on the assessment results of the design conditions. Specifically, the method can display the assessment compliance status in an intuitive color-coded alert format through a graphical user interface. For example, a green status is triggered for assessment results that meet the on-site requirements, while a red status is triggered for assessment results that do not meet the on-site requirements, thus achieving a prominent engineering alert. Subsequently, the various equivalent calculation data streams generated during the assessment process are summarized with the final comparison conclusions, and the report is exported in the form of an electronic document. As a preferred implementation, the prediction result report can be automatically formatted into a standardized electronic file such as .pdf or .doc that is easy to view and archive.

[0063] Other embodiments of the present invention provide a system for predicting the frost resistance level of concrete in high-altitude and cold regions to realize digital power grids, mainly used to implement the prediction method described in any of the foregoing embodiments. For example... Figure 2 As shown, the prediction system mainly consists of seven parts, including an environmental information database, a design information database, a concrete frost resistance prediction center, a regional freeze-thaw cycle calculation criterion database, an on-site frost resistance assessment criterion database, a GUI window, and an output terminal. The various modules of the system are interconnected via a data bus or communication interface, together forming a digital infrastructure supporting the refined design of concrete structures in high-altitude and cold regions.

[0064] In the system's specific operation, the environmental information database is mainly used to acquire and store basic parameters such as the regional meteorological temperature, on-site temperature, average annual cooling rate, and cooling rate under standard laboratory rapid freezing conditions for determining the location of transmission line towers. The design information database is simultaneously used to receive and store line design parameters from the early stages of the project. To achieve seamless integration with commonly used engineering software, this relevant basic data is preferably imported directly into the environmental and design information databases in .xls or .xlsx spreadsheet file formats. These two databases constitute the underlying data input for the system's subsequent automated calculations.

[0065] As the core processing hub of the entire prediction system, the concrete frost resistance grade prediction center, after reading relevant information from the environmental and design information databases, initiates a request to the backend criterion library. The freeze-thaw calculation criterion library at the system logic level encompasses two functional sub-modules: regional freeze-thaw cycle calculation criteria and on-site frost resistance grade assessment criteria. Based on the invoked physical conversion logic, the prediction center calculates the frost resistance grade and minimum concrete strength requirements of the on-site concrete. Furthermore, relying on its internally pre-set expert rule library, it can directly propose corresponding concrete mix design requirements and on-site curing measures based on the actually calculated frost resistance grade.

[0066] After obtaining the scientifically calculated benchmark indicators, the Concrete Freeze-Thaw Resistance Prediction Center further conducts a compliance comparison and evaluation of the pre-input design freeze-thaw resistance grade and design concrete strength for the project. The subsequent evaluation results are sent to the front-end graphical user interface. If the system determines that all evaluation conditions are met, the GUI window displays confirmation that the design conditions meet the site requirements and triggers a "green" indicator to indicate approval; if any condition does not meet the formula requirements, the GUI window displays a warning message that the design conditions do not meet the site requirements and triggers a "red" warning status.

[0067] Finally, the GUI window outputs the entire data stream, including assessment conclusions and early warning status, to the system's output terminal. The data output terminal has a file encapsulation function, which documents the received calculation process and judgment results, ultimately generating a .pdf or .doc file format for a prediction report on the frost resistance level of concrete in high-altitude and cold regions. This finished file can be directly distributed to the project department for easy access and use by on-site construction personnel and technical supervisors. The automated operation of the entire system greatly avoids the tediousness and error risks of manual calculations, providing an efficient and reliable assessment tool for the construction of digital power grids in extreme high-altitude and cold environments.

[0068] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention shall be included within the scope of protection of this invention.

Claims

1. A method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids, characterized in that, include: S1. Obtain basic environmental parameters and laboratory rapid freezing parameters for the area where the transmission line tower is located; S2. Based on the temperature parameter in the environmental basic parameters and the regional characteristics of the tower location, select the corresponding regional freeze-thaw cycle calculation criteria and calculate the average annual number of natural freeze-thaw cycles in the region. S3. Based on the moisture-related parameters, cooling rate parameters and laboratory rapid freezing parameters in the environmental basic parameters, the annual average number of natural freeze-thaw cycles in the region is corrected by multiple factors to obtain the on-site equivalent number of freeze-thaw cycles. S4. Based on the equivalent freeze-thaw cycle number and the design service life of the transmission line, calculate the freeze-thaw resistance grade of the concrete on site and the minimum concrete strength required to meet the site requirements. S5. Obtain the design frost resistance grade and design concrete strength, and compare them with the frost resistance grade of the on-site concrete and the minimum concrete strength, respectively, to assess whether the current design conditions meet the on-site requirements.

2. The method for predicting the frost resistance level of concrete in high-altitude and cold regions for realizing digital power grids according to claim 1, characterized in that, The criteria for calculating the regional freeze-thaw cycle include: When the tower is located in a plain area with temperatures below 0°C, the calculation methods for the average annual number of natural freeze-thaw cycles in the area include: When the tower is located in a plain area with a temperature above 0°C, the calculation methods for the average annual number of natural freeze-thaw cycles in the area include: in, This indicates the average number of natural freeze-thaw cycles per year in the region; This indicates the average temperature of the coldest month in the area related to the route.

3. The method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids according to claim 2, characterized in that, The regional freeze-thaw cycle calculation criteria also include: When the tower is located in a plateau region, the methods for calculating the average annual number of natural freeze-thaw cycles in the region include: in, This indicates the average number of natural freeze-thaw cycles per year in the region; This indicates the average temperature of the coldest month in the area related to the route.

4. The method for predicting the frost resistance level of concrete in high-altitude and cold regions for realizing digital power grids according to claim 1, characterized in that, The method for calculating the equivalent number of freeze-thaw cycles in the field includes: in, Indicates the equivalent number of freeze-thaw cycles on-site; This represents the regional concrete saturation time ratio coefficient, which is the frequency of the number of days with precipitation greater than or equal to a set threshold during the freeze-thaw cycle. This indicates the average relative humidity during the on-site freeze-thaw cycle. This represents the average relative humidity over the time of the freeze-thaw cycle in the region; The cooling rate under standard laboratory rapid freezing conditions; The average annual cooling rate during a freeze-thaw cycle at the site; This indicates the average number of natural freeze-thaw cycles per year in the region.

5. The method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids according to claim 1, characterized in that, The calculation method for the frost resistance grade of the on-site concrete includes: Where F represents the freeze-thaw resistance grade of the concrete on site; Indicates the equivalent number of freeze-thaw cycles on-site; This indicates the design service life of the transmission line.

6. The method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids according to claim 5, characterized in that, The calculation method for the minimum concrete strength required to meet site conditions includes: The minimum concrete strength required to meet on-site requirements is determined based on the frost resistance grade of the concrete at the site. in, This indicates the minimum concrete strength required to meet on-site freeze-thaw resistance requirements.

7. The method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids according to claim 1, characterized in that, The assessment of whether the current design conditions meet the site requirements includes: Determine whether the design freeze resistance rating is met: Determine whether the designed concrete strength meets the requirements: Where F represents the freeze-thaw resistance grade of the concrete on site; Indicates the design freeze resistance rating; Indicates the design concrete strength; This indicates the minimum concrete strength required to meet on-site frost resistance requirements; If both the design frost resistance grade and the design concrete strength meet the requirements, then the design conditions are deemed to meet the site requirements; otherwise, the design conditions are deemed not to meet the site requirements.

8. The method for predicting the frost resistance grade of concrete in high-altitude and cold regions for realizing digital power grids according to claim 1, characterized in that, After completing the assessment of the current design conditions, the following also includes: The evaluation results based on the design conditions will output a prediction result report, which will be in electronic document format.

9. A system for predicting the frost resistance level of concrete in high-altitude and cold regions to realize digital power grids, characterized in that, The system for implementing the method as described in any one of claims 1 to 8 comprises: An environmental information database is used to store regional environmental parameters; Design information database, used to store circuit design parameters; The Concrete Freeze-Thaw Resistance Grade Prediction Center is used to call upon the criterion library and perform calculations and evaluations of freeze-thaw resistance grade and strength. A regional freeze-thaw cycle calculation criterion library is used to provide the calculation logic for natural freeze-thaw cycles; A database of on-site frost resistance rating assessment criteria is provided to offer equivalent cycles and strength conversion logic. A GUI window is used to display evaluation results and color warnings; The output terminal is used to generate and export prediction report files.

10. The system for predicting the frost resistance level of concrete in high-altitude and cold regions according to claim 9, characterized in that, The concrete frost resistance prediction center reads data from the environmental information database and the design information database, calls the regional freeze-thaw cycle calculation criterion database and the on-site frost resistance evaluation criterion database, calculates the frost resistance grade and minimum concrete strength requirements of the on-site concrete, and generates corresponding concrete mix design requirements and curing measures suggestions based on the calculation results.

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