Method and system for constructing relation model containing frozen soil wave velocity and ice saturation and computer equipment

Abstract

The invention provides a frozen soil wave velocity and ice saturation relation model construction method, a frozen soil wave velocity and ice saturation relation model construction system and computer equipment, and aims at obtaining the volume ice content of newly formed ice after the frozen soil is cooled and obtaining the porosity of the frozen soil based on the four-phase composition change before and after the frozen soil is cooled. And calculating the ice saturation according to the volume ice content and the porosity of the newly formed ice. And constructing a correlation curve between the wave velocity containing the frozen soil and the ice saturation, fitting the correlation curve to obtain fitting parameters, and constructing a relation model between the wave velocity containing the frozen soil and the ice saturation based on the fitting parameters. In the scheme, the ice saturation can be accurately calculated based on the four-phase composition change of the frozen soil before and after cooling, so that the relation model between the wave velocity and the ice saturation is constructed, and key reference data is provided for engineering safety and stability.

Description

Technical Field

[0001] This invention relates to the field of frozen soil simulation experiment technology, and more specifically, to a method, system, and computer equipment for constructing a model of the relationship between wave velocity and ice saturation in frozen soil containing ice. Background Technology

[0002] Most common geotechnical engineering problems are unsaturated soil mechanics problems, and commonly used specifications and design calculation theories mostly treat them directly as saturated soil. The variation of unfrozen water content affects the hydrophysical, thermal, and mechanical properties of unsaturated soils. Therefore, the study of the properties, state, variation, and quantity of unfrozen water in soil is an important part of frozen soil research and is of great significance for both theoretical research and engineering practice.

[0003] However, existing technologies only provide theoretical calculation methods for the unfrozen water content of unsaturated soil. The ice saturation of frozen soil, especially ice-containing frozen soil, reflects the ice-containing characteristics of frozen soil and is a key indicator for determining the mechanical properties and engineering classification of frozen soil. Existing technologies cannot determine the ice content and ice saturation of ice-containing frozen soil, and have not established a relationship model between frozen soil wave velocity and ice saturation, making it difficult to provide key reference data for engineering safety and stability. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, and computer device for constructing a model of the relationship between wave velocity and ice saturation in permafrost containing ice, so as to accurately calculate ice saturation and the relationship model between wave velocity and ice saturation.

[0005] In a first aspect, the present invention provides a method for constructing a model relating wave velocity and ice saturation in permafrost containing ice, the method comprising: Based on the changes in the four-phase composition of ice-containing frozen soil before and after cooling, the volumetric ice content of newly formed ice after cooling of ice-containing frozen soil was obtained, and the porosity of ice-containing frozen soil was obtained. The newly formed ice is formed by the condensation of some water in ice-containing frozen soil. The ice saturation is calculated based on the volumetric ice content of the newly formed ice and the porosity. A correlation curve between wave velocity and ice saturation in ice-containing permafrost is constructed, and the correlation curve is fitted to obtain fitting parameters. Based on the fitting parameters, a model relating wave velocity and ice saturation in ice-containing permafrost was constructed.

[0006] In an optional embodiment, the step of obtaining the volumetric ice content of newly formed ice after cooling of ice-containing permafrost includes: Obtain the initial volumetric ice content of the ice-containing permafrost before cooling, and obtain the total volumetric ice content of the ice-containing permafrost after cooling; The volumetric ice content of newly formed ice after the frozen soil is cooled is obtained by subtracting the initial volumetric ice content from the total volumetric ice content.

[0007] In an optional embodiment, the step of obtaining the total volumetric ice content of the ice-containing permafrost after cooling includes: The freezing characteristic curve of frozen soil containing ice was obtained by non-destructive nuclear magnetic resonance testing. The freezing characteristic curve is the curve of the volume content of unfrozen water in frozen soil changing with temperature. The total volumetric ice content is obtained by subtracting the volumetric content of unfrozen water from the initial volumetric water content of the frozen soil containing ice.

[0008] In an optional implementation, the non-destructive nuclear magnetic resonance test includes multiple sets of tests performed on ice-containing permafrost under different initial volume ice contents; The freezing characteristic curves include multiple freezing characteristic curves of frozen soil with different initial volume ice content.

[0009] In an optional embodiment, the four-phase composition of the ice-containing permafrost before cooling includes, from bottom to top, particles, initial ice, water, and air; The four-phase composition of the ice-containing permafrost after cooling, from bottom to top, includes particles, initial ice, newly formed ice formed by the condensation of some water, and air.

[0010] In an optional embodiment, the step of obtaining the porosity of the permafrost includes: Obtain the total volume, initial ice volume, and particle volume of the ice-containing permafrost; Based on the total volume, initial ice volume, and particle volume, the porosity of the ice-containing frozen soil is calculated.

[0011] In an optional implementation, the particle volume of the permafrost is obtained by the following method: Obtain the relative density of soil particles containing frozen soil and the dry density of the soil mass; The particle volume of the frozen soil is obtained based on the relative density of the soil particles, the dry density of the soil, the total volume of the frozen soil containing ice, and the initial ice volume.

[0012] In an optional implementation, the correlation curve between wave velocity and ice saturation of ice-containing permafrost includes multiple correlation curves between wave velocity and ice saturation obtained for ice-containing permafrost under different initial ice contents.

[0013] Secondly, this invention provides a system for constructing a model of the relationship between wave velocity and ice saturation in permafrost containing ice, the system comprising: The module is used to obtain the volumetric ice content of newly formed ice after the freezing of ice-containing frozen soil based on the changes in the four-phase composition before and after cooling, and to obtain the porosity of the ice-containing frozen soil, wherein the newly formed ice is formed by the condensation of some water in the ice-containing frozen soil. The calculation module is used to calculate the ice saturation based on the volumetric ice content of the newly formed ice and the porosity. The fitting module is used to construct a correlation curve between wave velocity and ice saturation in ice-containing permafrost, and to fit the correlation curve to obtain fitting parameters. A construction module is used to construct a model of the relationship between wave velocity and ice saturation in ice-containing permafrost based on the fitting parameters.

[0014] Thirdly, the present invention provides a computer device including a memory and a processor, wherein the memory stores computer-readable instructions, which, when executed by the processor, cause the processor to perform the method as described in any of the foregoing embodiments.

[0015] This invention provides a method, system, and computer equipment for constructing a model relating wave velocity and ice saturation in ice-containing permafrost. Based on the changes in the four-phase composition of ice-containing permafrost before and after cooling, the volumetric ice content of newly formed ice after cooling is obtained, along with the porosity of the ice-containing permafrost. Ice saturation is calculated based on the volumetric ice content and porosity of the newly formed ice. A correlation curve between wave velocity and ice saturation in ice-containing permafrost is constructed, and fitting parameters are obtained from this curve. Based on these fitting parameters, a model relating wave velocity and ice saturation in ice-containing permafrost is constructed. In this scheme, based on the changes in the four-phase composition of ice-containing permafrost before and after cooling, ice saturation can be accurately calculated, thereby constructing a model relating wave velocity and ice saturation, providing crucial reference data for engineering safety and stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating the method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost, as provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the four-phase composition of permafrost before cooling in an embodiment of the present invention; Figure 3 This is a schematic diagram of the four-phase composition of frozen soil after cooling in an embodiment of the present invention; Figure 4 for Figure 1 A flowchart of the sub-steps included in S11; Figure 5 for Figure 1 Another flowchart of the sub-steps included in S11; Figure 6 Freezing characteristic curve of silty clay provided in the embodiments of the present invention; Figure 7 A freezing characteristic curve of silt provided in an embodiment of the present invention; Figure 8 This is a curve showing the change of wave velocity with ice saturation in silty clay provided in an embodiment of the present invention; Figure 9 This is a curve showing the variation of wave velocity in silt with ice saturation provided in an embodiment of the present invention; Figure 10 A schematic diagram of the functional modules of the system for constructing a model of the relationship between wave velocity and ice saturation in ice-containing permafrost provided in an embodiment of the present invention; Figure 11 A structural block diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the present invention will now be described with reference to the accompanying drawings in the embodiments of the present invention.

[0019] Please see Figure 1 This is a flowchart illustrating a method for constructing a model relating wave velocity and ice saturation in icy permafrost, as provided in an embodiment of the present invention. This method can be executed by a system for constructing such a model, which can be implemented in software and / or hardware and can be configured in an electronic device, such as a computer, server, or programmable logic controller. The detailed steps of this method are described below.

[0020] S11. Based on the changes in the four-phase composition of the ice-containing frozen soil before and after cooling, the volumetric ice content of the newly formed ice after cooling is obtained, and the porosity of the ice-containing frozen soil is obtained. The newly formed ice is formed by the condensation of some water in the ice-containing frozen soil. S12, calculate the ice saturation based on the volumetric ice content of the newly formed ice and the porosity; S13, construct the correlation curve between wave velocity and ice saturation of ice-containing permafrost, and fit the correlation curve to obtain fitting parameters; S14. Based on the fitting parameters, a model relating wave velocity and ice saturation in ice-containing permafrost is constructed.

[0021] In this embodiment, the changes in the four-phase composition of ice-containing permafrost at different temperatures are studied, such as... Figure 2 and Figure 3As shown in the diagram, before cooling, the four-phase composition of ice-containing permafrost, from bottom to top, includes particles, initial ice, water, and air. After cooling, the four-phase composition of ice-containing permafrost, from bottom to top, includes particles, initial ice, newly formed ice (composed of some water condensation), and air. That is, as the temperature decreases, some of the liquid water in the soil begins to freeze, forming new ice crystals within the pores, i.e., newly formed ice.

[0022] By analyzing the changes in the four-phase composition of ice-containing frozen soil before and after cooling, the volumetric ice content of newly formed ice after cooling can be obtained, as well as the porosity of the ice-containing frozen soil.

[0023] Ice saturation in ice-bearing permafrost refers to the percentage of newly formed ice volume relative to the pore volume in the permafrost after cooling. It can be converted into the ratio of the volumetric ice content of newly formed ice to the porosity of the ice-bearing permafrost. Therefore, ice saturation can be calculated based on the volumetric ice content of newly formed ice and the porosity.

[0024] Based on this, by establishing the correlation curve between wave velocity and ice saturation in ice-containing permafrost, the parameters in the correlation model between wave velocity and ice saturation can be fitted based on the correlation curve to determine the fitting parameters, and thus the correlation model between wave velocity and ice saturation can be determined.

[0025] The following section will first explain the method for determining ice saturation.

[0026] Please see Figure 4 In this embodiment, the step of obtaining the volumetric ice content of newly formed ice after cooling of ice-containing permafrost can be achieved in the following way: S111, obtain the initial volumetric ice content of the ice-containing frozen soil before cooling, and obtain the total volumetric ice content of the ice-containing frozen soil after cooling; S112, by subtracting the initial volumetric ice content from the total volumetric ice content, the volumetric ice content of newly formed ice after the frozen soil containing ice is cooled is obtained.

[0027] In this embodiment, the initial volumetric ice content of the ice-containing permafrost before cooling can be expressed as: The initial volume ice content can be used as a known quantity, that is, relevant experiments can be performed under different initial volume ice contents.

[0028] The total volumetric ice content of frozen soil after cooling is related to its initial volumetric water content and unfrozen water content. This can be understood as the total volumetric ice content after cooling and the unfrozen water content together constituting the initial volumetric water content. Therefore, to determine the total volumetric ice content after cooling, it is necessary to first determine the unfrozen water content after cooling.

[0029] In this embodiment, the unfrozen water content of the frozen soil after cooling can be determined by using a non-destructive nuclear magnetic resonance (NMR) test to obtain the freezing characteristic curve of the frozen soil. This freezing characteristic curve represents the change in the volume content of unfrozen water in the frozen soil with temperature. Based on this freezing characteristic curve, the unfrozen water content at different temperatures can be determined.

[0030] The non-destructive nuclear magnetic resonance test includes multiple tests performed on frozen soil containing ice under different initial volume ice content conditions.

[0031] The freezing characteristic curves include multiple freezing characteristic curves of frozen soil with different initial volume ice content.

[0032] Based on this, the total volumetric ice content is obtained by subtracting the unfrozen water content from the initial water content of the ice-containing frozen soil.

[0033] The unfrozen water content of permafrost can be expressed as: The corresponding expression for the frozen characteristic curve is as follows:

[0034] Where T represents the temperature value, and a and b represent empirical parameters that can be determined by fitting a frozen characteristic curve.

[0035] The initial water content of frozen soil can be expressed as: The total volumetric ice content is expressed as The formula for calculating the ice content of the total volume of frozen soil after cooling is as follows:

[0036] In addition, please see Figure 5 The steps described above for obtaining the porosity of permafrost can be achieved in the following ways: S113, obtain the total volume, initial ice volume, and particle volume of the ice-containing permafrost; S114. Based on the total volume, initial ice volume, and particle volume, the porosity of the ice-containing frozen soil is calculated.

[0037] Specifically, based on the four-phase composition of ice-containing permafrost, the porosity can be calculated as follows:

[0038] In the formula, n This indicates the porosity (%) of the soil. These represent the total volume, pore volume, initial ice volume, and particle volume (cm³) of the ice-containing permafrost. 3 ).

[0039] The particle volume of frozen soil can be obtained in the following ways: Obtain the relative density of soil particles and the dry density of the soil mass containing frozen soil; based on the relative density of soil particles, the dry density of the soil mass, the total volume of frozen soil containing frozen soil and the initial ice volume, obtain the particle volume of frozen soil containing frozen soil.

[0040] Specifically, the particle volume of frozen soil is calculated as follows:

[0041] in, m s This indicates the dry soil mass (g). G s This represents the relative density of soil particles. For silty clay, the value is 2.70, and for silt, it is 2.65. The dry density of soil (g / cm³) -3 ).

[0042] Substituting the formula for calculating particle volume into the formula for calculating porosity, we obtain the following new method for calculating porosity:

[0043] As shown above, the ice saturation of ice-containing permafrost refers to the percentage of the volume of newly formed ice after the permafrost cools down relative to the pore volume. It can be converted into the ratio between the volume of newly formed ice after cooling and the porosity.

[0044] The volumetric ice content of newly formed ice can be expressed as: The ice content can be determined by the total volume after cooling. The result is obtained by subtracting the initial volume of ice before cooling, i.e. .

[0045] Based on this, the following formula can be obtained for calculating ice saturation:

[0046] If the total volume contains ice Substituting the relationships between initial moisture content and unfrozen water content into the above calculation formula, we can obtain the expression for ice saturation in terms of parameters such as temperature, initial volumetric ice content, soil dry density, and particle specific gravity:

[0047] As shown in the above formula, temperature, initial volumetric ice content, soil dry density, and particle specific gravity all affect the ice saturation of frozen soil containing ice. When the soil porosity is high but the pores are small, it may lead to a higher ice saturation. As the temperature decreases, the unfrozen water in the soil gradually transforms into ice, increasing the volumetric ice content and thus the ice saturation.

[0048] Based on the above, a correlation curve between wave velocity and ice saturation in ice-containing permafrost can be constructed, and the parameters in the relationship model between wave velocity and ice saturation can then be fitted. The correlation curve between wave velocity and ice saturation in ice-containing permafrost includes multiple correlation curves obtained for ice-containing permafrost under different initial ice contents.

[0049] The relationship between wave velocity and ice saturation is represented by the following model:

[0050] In the formula, V p Let represent the wave speed, and p, q, and r represent the fitting parameters to be fitted.

[0051] If we substitute the above expressions for ice saturation with respect to parameters such as temperature, initial volumetric ice content, soil dry density, and particle specific gravity into the relationship model between wave velocity and ice saturation, we can obtain the following relationships between wave velocity and temperature, initial volumetric ice (water) content, dry density, and particle specific gravity in ice-containing frozen soil:

[0052] Dry density, particle specific gravity, and initial volumetric ice content constitute the structural characteristics of ice-bearing frozen soil. Therefore, determining the initial volumetric ice content is crucial for understanding the wave velocity of ice-bearing frozen soil. In this embodiment, based on indoor nuclear magnetic resonance experiments, the freezing characteristic curve of ice-containing permafrost can be obtained, such as... Figure 6 and Figure 7 As shown, in the negative temperature range, the unfrozen water content drops sharply as the temperature decreases. As the temperature drops to 0 °C, the unfrozen water content begins to decrease, and with further temperature decreases, the unfrozen water content decreases drastically, indicating a region of rapid phase transition. The temperature ranges for silty clay and silt are (-5, 0) °C and (-3, 0) °C, respectively. The decrease in unfrozen water volume content in frozen soil with increasing initial volumetric ice content is due to the reduction in initial unfrozen water within the soil. Under the same initial volumetric ice content, the unfrozen water volume content of silty clay is greater than that of silt.

[0053] Using the above formula for calculating unfrozen water content, parameters a and b were fitted, and the fitting parameters of unfrozen water content and temperature for ice-containing frozen soil are shown in Table 1. Except for silt with an initial volume ice content of 73.1%, all the fitting correlation coefficients are greater than 0.90, indicating that the freezing characteristic curve of ice-containing frozen soil described by the above formula for unfrozen water content has good applicability.

[0054] Table 1 Fitting parameters for the freezing characteristic curves of frozen soil containing ice

[0055] also, Figure 8 The relationship between wave velocity and ice saturation in silty clay with different initial ice contents is presented. As temperature decreases, the ice saturation of the ice-containing frozen soil increases, and the wave velocity exhibits a pattern of initially increasing slowly and then rapidly. For a low-ice silty clay with an initial ice content of 12.2%, as the temperature decreases from -1 °C to -20 °C, its ice saturation increases from 64.7% to 86.3%, and the wave velocity increases from 2.055 km / s. -1 Increased to 2.928 km s -1 Ice saturation and wave velocity increased by 33.4% and 42.5%, respectively. With the initial volumetric ice content increasing to 34.3%, the maximum ice saturation and wave velocity of the glacial frozen silty clay reached 85.4% and 3.262 km / s, respectively. -1 These figures represent increases of 44.2% and 37.0% respectively compared to -1 °C. For silty clay containing ice with an ice saturation of 74.7%, the maximum ice saturation and wave velocity are 84.3% and 3.704 km / s, respectively. -1 These figures represent increases of 88.0% and 21.0% respectively compared to -1 °C. The initial volumetric ice content affects the ice saturation and P-wave velocity of ice-bearing permafrost. Compared to low-ice permafrost with an initial volumetric ice content of 12.2%, the ice saturation of ice-bearing silty clay showed little change at temperatures other than -1 °C as the initial volumetric ice content gradually increased to 41.5%. However, as the volumetric ice content continued to increase to 74.7%, the frozen silty clay entered an ice-rich state, especially in the range of -1 °C to -5 °C, where the ice saturation decreased significantly, by as much as 11.2%. These results indicate that as the initial ice content in permafrost increases, the wave velocity increases, but the ice saturation decreases. This is because the initial unfrozen water in the pores is relatively low; as the temperature decreases, the amount of water phase turning into ice decreases, thus reducing the ice saturation. Figure 9 The wave velocity of silt with different initial ice contents varies with ice saturation, and it exhibits a similar variation pattern to that of silty clay.

[0056] The relationship between wave velocity and ice saturation in frozen soil with different initial ice contents is shown in Table 2, with fitting parameters (including p, q, and r). It can be observed that the correlation coefficient (R²) of the fitting is... 2 The values ​​are all greater than 0.9558, with some reaching 0.9952, indicating that the quadratic polynomial fitting of frozen soil wave velocity and ice saturation has a very good effect.

[0057] Table 2 Fitting parameters of wave velocity and ice saturation in permafrost containing ice

[0058] The method for constructing a model relating wave velocity and ice saturation in ice-containing frozen soil provided in this embodiment establishes the relationship between ice saturation and density, temperature, initial volumetric ice content, and soil specific gravity based on the changes in the four-phase components of ice-containing frozen soil before and after cooling. During this process, the freezing characteristic curve of the ice-containing frozen soil is obtained using non-destructive nuclear magnetic resonance (NMR) technology. Based on this, a model relating wave velocity and ice saturation in ice-containing frozen soil is established, providing crucial reference data for engineering safety and stability.

[0059] Based on the same inventive concept, please refer to Figure 10 This invention also provides a functional module diagram of a system for constructing a model of the relationship between wave velocity and ice saturation in permafrost. This embodiment can divide the system into functional modules based on the above-described method embodiments. For example, each function can be divided into its own module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment is illustrative and represents only a logical functional division; other division methods may be used in actual implementation.

[0060] For example, when dividing functional modules according to their respective functions, Figure 10 The illustrated system for constructing a model of the relationship between wave velocity and ice saturation in icy permafrost is only a schematic diagram. This system can include an acquisition module, a calculation module, a fitting module, and a construction module. The functions of each module in this system will be described in detail below.

[0061] The module is used to obtain the volumetric ice content of newly formed ice after the freezing of ice-containing frozen soil based on the changes in the four-phase composition before and after cooling, and to obtain the porosity of the ice-containing frozen soil, wherein the newly formed ice is formed by the condensation of some water in the ice-containing frozen soil. The calculation module is used to calculate the ice saturation based on the volumetric ice content of the newly formed ice and the porosity. The fitting module is used to construct a correlation curve between wave velocity and ice saturation in ice-containing permafrost, and to fit the correlation curve to obtain fitting parameters. A construction module is used to construct a model of the relationship between wave velocity and ice saturation in ice-containing permafrost based on the fitting parameters.

[0062] The system for constructing the relationship model between wave velocity and ice saturation in icy permafrost provided in this embodiment can be used to execute the method for constructing the relationship model between wave velocity and ice saturation in icy permafrost under any of the above embodiments. For details not covered in this embodiment, please refer to the corresponding descriptions in the above embodiments. This embodiment will not elaborate further here.

[0063] Please see Figure 11 This is a structural block diagram of a computer device provided in an embodiment of the present invention. The computer device includes a memory, a processor, and a communication module. The memory, processor, and communication module are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines.

[0064] The memory is used to store computer programs or data. Memory can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc.

[0065] The processor is used to read / write data or programs stored in the memory and execute the method for constructing a model of the relationship between wave velocity and ice saturation in frozen soil provided in any embodiment of the present invention.

[0066] The communication module is used to establish communication connections between computer devices and other communication terminals via a network, and to send and receive data via the network.

[0067] It should be understood that, Figure 11 The structure shown is only a schematic diagram of a computer device; the computer device may also include components that are larger than those shown. Figure 11 The more or fewer components shown, or having the same Figure 11 The different configurations shown.

[0068] Furthermore, embodiments of the present invention also provide a computer-readable storage medium storing machine-executable instructions, which, when executed, implement the method for constructing a model of the relationship between wave velocity and ice saturation in ice-containing permafrost provided in the above embodiments.

[0069] Specifically, the computer-readable storage medium can be a general-purpose storage medium, such as a removable disk or hard disk. When the computer program on the computer-readable storage medium is executed, it can perform the above-mentioned method for constructing the relationship model between wave velocity and ice saturation in permafrost. The processes involved in the execution of the executable instructions on the computer-readable storage medium can be referred to the relevant descriptions in the above method embodiments, and will not be detailed here.

[0070] In the embodiments provided by this invention, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0071] Furthermore, 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.

[0072] Furthermore, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0073] It should be noted that if the functionality is implemented as a software module 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 this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0074] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0075] The above are merely embodiments of the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for constructing a model relating wave velocity and ice saturation in permafrost containing ice, characterized in that, The method includes: Based on the changes in the four-phase composition of ice-containing frozen soil before and after cooling, the volumetric ice content of newly formed ice after cooling of ice-containing frozen soil was obtained, and the porosity of ice-containing frozen soil was obtained. The newly formed ice is formed by the condensation of some water in ice-containing frozen soil. The ice saturation is calculated based on the volumetric ice content of the newly formed ice and the porosity. A correlation curve between wave velocity and ice saturation in ice-containing permafrost is constructed, and the correlation curve is fitted to obtain fitting parameters. Based on the fitting parameters, a model relating wave velocity and ice saturation in ice-containing permafrost was constructed.

2. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 1, characterized in that, The step of obtaining the volumetric ice content of newly formed ice after cooling of ice-containing permafrost includes: Obtain the initial volumetric ice content of the ice-containing permafrost before cooling, and obtain the total volumetric ice content of the ice-containing permafrost after cooling; The volumetric ice content of newly formed ice after the frozen soil is cooled is obtained by subtracting the initial volumetric ice content from the total volumetric ice content.

3. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 2, characterized in that, The step of obtaining the total volume ice content of ice-containing permafrost after cooling includes: The freezing characteristic curve of frozen soil containing ice was obtained by non-destructive nuclear magnetic resonance testing. The freezing characteristic curve is the curve of the volume content of unfrozen water in frozen soil changing with temperature. The total volumetric ice content is obtained by subtracting the volumetric content of unfrozen water from the initial volumetric water content of the frozen soil containing ice.

4. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 3, characterized in that, The non-destructive nuclear magnetic resonance test includes multiple sets of tests performed on ice-containing permafrost soil under different initial volume ice contents; The freezing characteristic curves include multiple freezing characteristic curves of frozen soil with different initial volume ice content.

5. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 1, characterized in that, The four-phase composition of the ice-containing permafrost before cooling, from bottom to top, includes particles, initial ice, water, and air; The four-phase composition of the ice-containing permafrost after cooling, from bottom to top, includes particles, initial ice, newly formed ice formed by the condensation of some water, and air.

6. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 5, characterized in that, The step of obtaining the porosity of the frozen soil includes: Obtain the total volume, initial ice volume, and particle volume of the ice-containing permafrost; Based on the total volume, initial ice volume, and particle volume, the porosity of the ice-containing frozen soil is calculated.

7. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 6, characterized in that, The particle volume of frozen soil was obtained in the following way: Obtain the relative density of soil particles containing frozen soil and the dry density of the soil mass; The particle volume of the frozen soil is obtained based on the relative density of the soil particles, the dry density of the soil, the total volume of the frozen soil containing ice, and the initial ice volume.

8. The method for constructing a model relating wave velocity and ice saturation in ice-containing permafrost according to claim 1, characterized in that, The correlation curves between wave velocity and ice saturation in ice-containing permafrost include multiple correlation curves between wave velocity and ice saturation obtained under different initial ice contents in ice-containing permafrost.

9. A system for constructing a model of the relationship between wave velocity and ice saturation in permafrost containing ice, characterized in that, The system includes: The module is used to obtain the volumetric ice content of newly formed ice after the freezing of ice-containing frozen soil based on the changes in the four-phase composition before and after cooling, and to obtain the porosity of the ice-containing frozen soil, wherein the newly formed ice is formed by the condensation of some water in the ice-containing frozen soil. The calculation module is used to calculate the ice saturation based on the volumetric ice content of the newly formed ice and the porosity. The fitting module is used to construct a correlation curve between wave velocity and ice saturation in ice-containing permafrost, and to fit the correlation curve to obtain fitting parameters. A construction module is used to construct a model of the relationship between wave velocity and ice saturation in ice-containing permafrost based on the fitting parameters.

10. A computer device, characterized in that, The device includes a memory and a processor, wherein the memory stores computer-readable instructions that, when executed by the processor, cause the processor to perform the method as described in any one of claims 1 to 8.

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