Strong adsorption water content test method, device, medium and electronic equipment
By using nuclear magnetic resonance (NMR) technology to detect the pore water characteristics of soil and rock masses and to calculate the thickness and content of strongly adsorbed water layers, the problem of inaccurate and time-consuming measurements in existing technologies has been solved, enabling rapid and accurate measurement of the content of strongly adsorbed water.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2022-12-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies are insufficient for accurately and quickly measuring the content of strongly adsorbed water in soil and rock masses, and conventional methods are destructive to the samples and time-consuming.
Using nuclear magnetic resonance (NMR) technology, the thickness and content of strongly adsorbed water layers were calculated by detecting the longitudinal relaxation time, pore surface area, and pore volume of pore water in the soil, combined with NMR variable field experiments.
It enables rapid and accurate measurement of the content of strongly adsorbed water, improving measurement efficiency and accuracy while avoiding destructive effects on the sample.
Smart Images
Figure CN116087258B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of geotechnical engineering technology, and in particular to methods, apparatus, media, and electronic equipment for testing the content of strongly adsorbed water. Background Technology
[0002] Liquid water in soil refers to water within the pores of the soil. Based on its state, properties, and flow pattern, it can be classified into adsorbed water, capillary water, and gravitational water. Adsorbed water can be further divided into strongly adsorbed water and weakly adsorbed water. Strongly adsorbed water, as a type of pore water in direct contact with the surface of soil particles, has a significant impact on the engineering mechanics and seepage characteristics of soil, especially cohesive soils. Strongly adsorbed water is even considered a separate phase within the soil, distinct from soil particles and water itself.
[0003] Currently, the main methods for direct measurement of adsorbed water in soil and rock include X-ray diffraction, pressurized drainage, centrifugation, hygroscopic method, volumetric flask method, electrochemical method, ion exchange method, nuclear magnetic resonance method, and thermogravimetric analysis. However, most of these methods are based on monodisperse, rigid, spherical, dilute dispersion systems, which are inconvenient to apply in practice. Some of these methods are destructive to the sample, and the measurement results are inaccurate and time-consuming.
[0004] Therefore, there is an urgent need for a method to directly test the content of strongly adsorbed water and improve the accuracy of strongly adsorbed water measurement. Summary of the Invention
[0005] The embodiments of this application provide a method, apparatus, medium, and electronic equipment for testing the content of strongly adsorbed water, which can directly measure the content of strongly adsorbed water with good measurement results.
[0006] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.
[0007] According to a first aspect of the embodiments of this application, a method for testing the content of strongly adsorbed water is provided, comprising:
[0008] Obtain the water density;
[0009] By testing the soil, we can obtain the pore surface area, pore volume, and specific surface area of the soil where pore water is located.
[0010] The longitudinal relaxation time of pore water was obtained by examining the soil using nuclear magnetic resonance (NMR) spectrometry.
[0011] Nuclear magnetic resonance variable field experiments were conducted on soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles.
[0012] The longitudinal relaxation rate is obtained based on the longitudinal relaxation time of pore water, the pore surface area where the pore water is located, and the pore volume where the pore water is located.
[0013] The thickness of the strongly adsorbed water layer on the surface of soil particles is obtained based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles.
[0014] The content of strongly adsorbed water in the soil is obtained based on the specific surface area of the soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density.
[0015] In some embodiments of this application, based on the foregoing scheme, obtaining the longitudinal relaxation rate according to the longitudinal relaxation time of pore water, the pore surface area where the pore water is located, and the pore volume where the pore water is located includes:
[0016] The longitudinal relaxation rate is obtained using the following formula:
[0017]
[0018] Where ρ1 is the longitudinal relaxation rate, V is the pore volume where the pore water is located, T1 is the longitudinal relaxation time of the pore water, and S is the pore surface area where the pore water is located.
[0019] Specifically, based on macroscopic nuclear magnetic resonance theory, pore water in soil is usually in a rapid diffusion region, and its longitudinal relaxation time can be expressed by the following formula:
[0020]
[0021] Where T1 is the longitudinal relaxation time of the pore water, T 1B Let ρ be the relaxation time of free water, ρ1 be the longitudinal relaxation rate, S be the pore surface area where the pore water is located, V be the pore volume where the pore water is located, and T be the relaxation time of free water. 1s λ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles, and λ is the thickness of the strongly adsorbed water layer on the surface of soil particles.
[0022] In the above formula, since T 1B Much greater than T 1s Therefore, T 1B The effect on T1 is negligible, and the above formula can be simplified to the following formula:
[0023]
[0024] Where T1 is the longitudinal relaxation time of pore water, ρ1 is the longitudinal relaxation rate, S is the pore surface area where the pore water is located, V is the pore volume where the pore water is located, and T 1s λ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles, and λ is the thickness of the strongly adsorbed water layer on the surface of soil particles.
[0025] The formula for calculating ρ1 can be obtained from the above formula.
[0026] In some embodiments of this application, based on the foregoing scheme, obtaining the thickness of the strongly adsorbed water layer on the surface of soil particles according to the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles includes:
[0027] The thickness of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula:
[0028] λ=ρ1T 1s
[0029] Where λ is the thickness of the strongly adsorbed water layer on the surface of soil particles, ρ1 is the longitudinal relaxation rate, and T 1s The relaxation time is the time when the water layer on the surface of soil particles is strongly adsorbed.
[0030] In some embodiments of this application, based on the foregoing scheme, obtaining the strongly adsorbed water content of the soil according to the specific surface area of the soil, the thickness of the strongly adsorbed water layer on the surface of the soil particles, and the water density includes:
[0031] The content of strongly adsorbed water in soil is obtained using the following formula:
[0032]
[0033] Where w is the content of strongly adsorbed water in the soil, λ is the thickness of the strongly adsorbed water layer on the surface of soil particles, SSA is the specific surface area of the soil, and ρ w This is the density of water.
[0034] In some embodiments of this application, based on the foregoing scheme, the step of conducting nuclear magnetic resonance variable field experiments on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles includes:
[0035] The relaxation time of the strongly adsorbed water layer on the surface of soil particles was obtained based on the Korb model.
[0036] In some embodiments of this application, based on the foregoing scheme, obtaining the relaxation time of the strongly adsorbed water layer on the surface of soil particles according to the Korb model includes:
[0037] The soil was analyzed to obtain the Larmor angular velocity of the protons.
[0038] Inductively coupled plasma mass spectrometry was used to test soil particles and obtain the paramagnetic ion surface density of the soil particle surface.
[0039] The relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained based on the Larmor angular velocity of the proton and the surface density of paramagnetic ions on the soil particle surface.
[0040] In some embodiments of this application, based on the foregoing scheme, the step of detecting the soil and obtaining the Larmor angular velocity of the proton includes:
[0041] Obtain the magnetic field strength when the nuclear magnetic resonance spectrometer is used to examine soil;
[0042] The Larmor angular velocity of the proton is obtained using the following formula:
[0043] ω I =γ I B
[0044] , where ω I γ is the Larmor angular velocity of the proton. I denoted as the gyromagnetic ratio of the proton, and B is the magnetic field strength when the nuclear magnetic resonance spectrometer detects soil.
[0045] In some embodiments of this application, based on the foregoing scheme, obtaining the relaxation time of the strongly adsorbed water layer on the surface of soil particles according to the Larmor angular velocity of the proton and the paramagnetic ion surface density on the surface of the soil particles includes:
[0046] Nuclear magnetic resonance variable field experiments were conducted on the soil to obtain the surface diffusion time and the residence time of water molecules on the pore surface;
[0047] The relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula:
[0048]
[0049] , among which, T 1s σ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles. s The surface density of paramagnetic ions on the soil particle surface is δ = 0.27 nm, γ I γ is the gyromagnetic ratio of the proton. S The gyromagnetic ratio of surface ions. To reduce Planck's constant, S is the spin quantum number of the paramagnetic center, τ m τ is the surface diffusion time. S ω represents the residence time of water molecules on the pore surface. I Let be the Larmor angular velocity of the proton.
[0050] Specifically, the reduced Planck constant is obtained using the following formula:
[0051]
[0052] ,in, Let h be the Planck constant, which is a reduced Planck constant.
[0053] In some embodiments of this application, a nuclear magnetic resonance spectrometer is used to detect soil particles to obtain the longitudinal relaxation time of pore water. A nuclear magnetic field variation experiment is performed on the soil particles to obtain the surface diffusion time and the residence time of water molecules on the pore surface. The pore surface area, pore volume, relaxation time of the strongly adsorbed water layer on the surface of soil particles, specific surface area and water density of the soil are obtained using existing technology. Thus, the content of strongly adsorbed water can be quickly tested with high testing efficiency.
[0054] According to a second aspect of the embodiments of this application, a device for testing the content of strongly adsorbed water is provided, the device comprising:
[0055] The detection unit obtains water density, detects soil, and obtains the pore surface area, pore volume, and specific surface area of the soil where pore water is located. The soil is detected using a nuclear magnetic resonance spectrometer to obtain the longitudinal relaxation time of pore water. A nuclear magnetic resonance variable field experiment is performed on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles.
[0056] The calculation unit obtains the longitudinal relaxation rate based on the longitudinal relaxation time of pore water, the pore surface area where pore water is located, and the pore volume where pore water is located. Based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles, the thickness of the strongly adsorbed water layer on the surface of soil particles is obtained. Based on the specific surface area of soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density, the content of strongly adsorbed water in soil is obtained.
[0057] According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored, the computer program including executable instructions that, when executed by a processor, implement the method described in any of the embodiments of the first aspect.
[0058] According to a fourth aspect of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors cause the one or more processors to implement the method described in any embodiment of the first aspect above.
[0059] The beneficial effects of the embodiments of the second to fourth aspects described above can be referred to the beneficial effects of the first aspect and the embodiments of the first aspect described above, and will not be repeated here.
[0060] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0061] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:
[0062] Figure 1 A flowchart of the method for measuring the content of strongly adsorbed water in an embodiment of this application is shown;
[0063] Figure 2 A block diagram of the strongly adsorbed water content testing device in an embodiment of this application is shown;
[0064] Figure 3 A schematic diagram of a computer-readable storage medium in an embodiment of this application is shown;
[0065] Figure 4 A schematic diagram of the system structure of an electronic device in an embodiment of this application is shown. Detailed Implementation
[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0067] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.
[0068] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0069] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0070] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.
[0071] Figure 1 A flowchart of a method for measuring the content of strongly adsorbed water according to an embodiment of this application is shown. This method can be performed by a device with computational processing capabilities.
[0072] Reference Figure 1 As shown, this method for measuring the content of strongly adsorbed water includes at least steps S1 to S4, which are described in detail below:
[0073] In step S1, the water density is obtained;
[0074] The soil was tested to obtain the pore surface area, pore volume, and specific surface area of the soil containing pore water. The soil was tested using a nuclear magnetic resonance spectrometer to obtain the longitudinal relaxation time of the pore water. A nuclear magnetic resonance variable field experiment was performed on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of the soil particles.
[0075] In this application, the specific surface area of the soil can be measured by the methylene blue method, thereby obtaining the pore surface area where the pore water is located. The pore volume where the pore water is located can be obtained by drying the soil. Specifically, after drying the soil, the weight of the pore water in the soil is obtained, and the quotient of the weight of the pore water and the density of the water is the pore volume where the pore water is located.
[0076] In this application, the longitudinal relaxation time of pore water obtained by detecting soil using a nuclear magnetic resonance spectrometer can be accomplished using the following method:
[0077] Several soil samples are placed in a nuclear magnetic resonance (NMR) spectrometer, and an IR sequence is applied to the soil samples to obtain longitudinal recovery curves. The NMR spectrometer inverts the longitudinal recovery curves to obtain the longitudinal NMR relaxation time distribution curves of the pore water in the soil samples. The peak value is found on the longitudinal NMR relaxation time distribution curves, and this peak value is the longitudinal relaxation time of the pore water in the soil samples.
[0078] In step S2, the longitudinal relaxation rate is obtained based on the longitudinal relaxation time of the pore water, the pore surface area where the pore water is located, and the pore volume where the pore water is located.
[0079] In this application, the longitudinal relaxation rate can be obtained using the following formula:
[0080]
[0081] Where ρ1 is the longitudinal relaxation rate, V is the pore volume where the pore water is located, T1 is the longitudinal relaxation time of the pore water, and S is the pore surface area where the pore water is located.
[0082] The specific derivation process is as follows:
[0083] Based on macroscopic nuclear magnetic resonance theory, pore water in soil is usually in a rapid diffusion region, and its longitudinal relaxation time can be expressed by the following formula:
[0084]
[0085] Where T1 is the longitudinal relaxation time of the pore water, T 1B Let ρ be the relaxation time of free water, ρ1 be the longitudinal relaxation rate, S be the pore surface area where the pore water is located, V be the pore volume where the pore water is located, and T be the relaxation time of free water. 1s λ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles, and λ is the thickness of the strongly adsorbed water layer on the surface of soil particles.
[0086] In the above formula, since T 1B Much greater than T 1s Therefore, T 1B The effect on T1 is negligible, and the above formula can be simplified to the following formula:
[0087]
[0088] Where T1 is the longitudinal relaxation time of pore water, ρ1 is the longitudinal relaxation rate, S is the pore surface area where the pore water is located, V is the pore volume where the pore water is located, and T 1s λ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles, and λ is the thickness of the strongly adsorbed water layer on the surface of soil particles.
[0089] The formula for calculating ρ1 can be obtained from the above formula.
[0090] In step S3, the thickness of the strongly adsorbed water layer on the surface of the soil particles is obtained based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the soil particle surface.
[0091] In this application, the thickness of the strongly adsorbed water layer on the surface of soil particles can be obtained using the following formula:
[0092] λ=ρ1T 1s
[0093] Where λ is the thickness of the strongly adsorbed water layer on the surface of soil particles, ρ1 is the longitudinal relaxation rate, and T 1s The relaxation time is the time when the water layer on the surface of soil particles is strongly adsorbed.
[0094] In step S4, the content of strongly adsorbed water in the soil is obtained based on the specific surface area of the soil, the thickness of the strongly adsorbed water layer on the surface of the soil particles, and the water density.
[0095] In this application, the content of strongly adsorbed water in soil can be obtained using the following formula:
[0096]
[0097] Where w is the content of strongly adsorbed water in the soil, λ is the thickness of the strongly adsorbed water layer on the surface of soil particles, SSA is the specific surface area of the soil, and ρ w This is the density of water.
[0098] In this application, nuclear magnetic resonance variable field experiments were conducted on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles, including:
[0099] (1) The soil was tested to obtain the Larmor angular velocity of the protons, as detailed below:
[0100] Obtain the magnetic field strength when the nuclear magnetic resonance spectrometer is used to examine soil;
[0101] The Larmor angular velocity of the proton is obtained using the following formula:
[0102] ω I =γ I B
[0103] , where ω I γ is the Larmor angular velocity of the proton. I denoted as the gyromagnetic ratio of the proton, and B is the magnetic field strength when the nuclear magnetic resonance spectrometer detects soil.
[0104] (2) The surface density of paramagnetic ions on the surface of soil particles was obtained by using an inductively coupled plasma mass spectrometer.
[0105] (3) Nuclear magnetic resonance variable field experiments were conducted on the soil to obtain the surface diffusion time and the residence time of water molecules on the pore surface.
[0106] (4) Based on the Korb model, the relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained, including:
[0107] The relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula:
[0108]
[0109] , among which, T 1s σ is the relaxation time of the strongly adsorbed water layer on the surface of soil particles. s The surface density of paramagnetic ions on the soil particle surface is δ = 0.27 nm, γ I γ is the gyromagnetic ratio of the proton. S The gyromagnetic ratio of surface ions. To reduce Planck's constant, S is the spin quantum number of the paramagnetic center, τ m τ is the surface diffusion time. S ω represents the residence time of water molecules on the pore surface. I Let be the Larmor angular velocity of the proton.
[0110] The reduced Planck constant is obtained using the following formula:
[0111]
[0112] ,in, Let h be the Planck constant, which is a reduced Planck constant.
[0113] γ I γ S S is a constant.
[0114] See Figure 2 The diagram shows a block diagram of the strongly adsorbed water content testing device in an embodiment of this application.
[0115] like Figure 2 As shown, based on the same inventive concept, the second aspect of this application also provides a strong adsorption water content testing device 100, including: a detection unit 101 and a calculation unit 102.
[0116] Among them, the detection unit 101 obtains the water density, detects the soil, and obtains the pore surface area, pore volume and specific surface area of the soil where the pore water is located. It uses a nuclear magnetic resonance spectrometer to detect the soil and obtains the longitudinal relaxation time of the pore water. It also conducts a nuclear magnetic resonance variable field experiment on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of the soil particles.
[0117] The calculation unit 102 obtains the longitudinal relaxation rate based on the longitudinal relaxation time of pore water, the pore surface area where pore water is located, and the pore volume where pore water is located. Based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles, the thickness of the strongly adsorbed water layer on the surface of soil particles is obtained. Based on the specific surface area of soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density, the content of strongly adsorbed water in soil is obtained.
[0118] Based on the same inventive concept, a third aspect of this application also provides, as another aspect, a computer-readable storage medium storing a program product capable of implementing the above-described method for testing the content of strongly adsorbed water. In some possible implementations, various aspects of this application can also be implemented as a program product including program code, which, when run on a terminal device, causes the terminal device to perform the steps described in the "Exemplary Methods" section of this specification according to various exemplary embodiments of this application.
[0119] refer to Figure 3 As shown, a program product 200 for implementing the above-described method according to an embodiment of this application is described. It may employ a portable compact disc read-only memory (CD-ROM) and include program code, and can run on a terminal device, such as a personal computer. However, the program product of this application is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.
[0120] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.
[0121] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting programs for use by or in conjunction with an instruction execution system, apparatus, or device.
[0122] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.
[0123] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java and C++, and conventional procedural programming languages such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).
[0124] In another respect, this application also provides an electronic device capable of implementing the above-described method.
[0125] Those skilled in the art will understand that various aspects of this application can be implemented as a system, method, or program product. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "system."
[0126] The following reference Figure 4 To describe an electronic device 300 according to this embodiment of the present application. Figure 4 The electronic device 300 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.
[0127] like Figure 4 As shown, the electronic device 300 is manifested in the form of a general-purpose computing device. The components of the electronic device 300 may include, but are not limited to: at least one processing unit 310, at least one storage unit 320, and a bus 330 connecting different system components (including storage unit 320 and processing unit 310).
[0128] The storage unit stores program code that can be executed by the processing unit 310, causing the processing unit 310 to perform the steps described in the "Embodiment Methods" section above according to various exemplary embodiments of this application.
[0129] Storage unit 320 may include readable media in the form of volatile storage units, such as random access memory (RAM) 321 and / or cache memory 322, and may further include read-only memory (ROM) 323.
[0130] Storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.
[0131] Bus 330 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.
[0132] Electronic device 300 can also communicate with one or more external devices 400 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 300, and / or with any device that enables electronic device 300 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 350. Furthermore, electronic device 300 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 360. As shown, network adapter 360 communicates with other modules of electronic device 300 via bus 330. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.
[0133] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit.
[0134] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.
[0135] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.
[0136] 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 this application, 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.
[0137] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A method for testing the content of strongly adsorbed water, characterized in that, include: Obtain the water density; By testing the soil, we can obtain the pore surface area, pore volume, and specific surface area of the soil where pore water is located. The longitudinal relaxation time of pore water was obtained by examining the soil using nuclear magnetic resonance (NMR) spectrometry. Nuclear magnetic resonance variable field experiments were conducted on soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles. The longitudinal relaxation rate is obtained based on the longitudinal relaxation time of pore water, the pore surface area where the pore water is located, and the pore volume where the pore water is located. The thickness of the strongly adsorbed water layer on the surface of soil particles is obtained based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles. The content of strongly adsorbed water in the soil is obtained based on the specific surface area of the soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density. The method of obtaining the thickness of the strongly adsorbed water layer on the surface of soil particles based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles includes: The thickness of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula: in, The thickness of the strongly adsorbed water layer on the surface of soil particles. The longitudinal relaxation rate, The relaxation time is the time when the water layer on the surface of soil particles is strongly adsorbed.
2. The method according to claim 1, characterized in that, The longitudinal relaxation rate is obtained based on the longitudinal relaxation time of pore water, the pore surface area where the pore water is located, and the pore volume where the pore water is located, including: The longitudinal relaxation rate is obtained using the following formula: in, The longitudinal relaxation rate, The pore volume where the pore water is located. The longitudinal relaxation time of pore water. This represents the pore surface area where the pore water is located.
3. The method according to claim 1, characterized in that, The method of determining the strongly adsorbed water content of soil based on the specific surface area of the soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density includes: The content of strongly adsorbed water in soil is obtained using the following formula: in, The soil has a high water adsorption capacity. The thickness of the strongly adsorbed water layer on the surface of soil particles. The specific surface area of the soil. This is the density of water.
4. The method according to claim 1, characterized in that, The nuclear magnetic resonance variable field experiment on the soil, to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles, includes: The relaxation time of the strongly adsorbed water layer on the surface of soil particles was obtained based on the Korb model.
5. The method according to claim 4, characterized in that, The relaxation time of the strongly adsorbed water layer on the surface of soil particles, obtained according to the Korb model, includes: The soil was analyzed to obtain the Larmor angular velocity of the protons. Inductively coupled plasma mass spectrometry was used to test soil particles and obtain the paramagnetic ion surface density of the soil particle surface. The relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained based on the Larmor angular velocity of the proton and the surface density of paramagnetic ions on the soil particle surface.
6. The method according to claim 5, characterized in that, The tested soil mass yields the Larmor angular velocity of the protons, including: Obtain the magnetic field strength when the nuclear magnetic resonance spectrometer is used to examine soil; The Larmor angular velocity of the proton is obtained using the following formula: in, The Larmor angular velocity of the proton. The gyromagnetic ratio of the proton. The magnetic field strength when detecting soil with a nuclear magnetic resonance spectrometer.
7. The method according to claim 4, characterized in that, The relaxation time of the strongly adsorbed water layer on the surface of soil particles, obtained based on the Larmor angular velocity of protons and the paramagnetic ion surface density on the soil particle surface, includes: Nuclear magnetic resonance variable field experiments were conducted on the soil to obtain the surface diffusion time and the residence time of water molecules on the pore surface; The relaxation time of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula: in, The relaxation time of the strongly adsorbed water layer on the surface of soil particles. The surface density of paramagnetic ions on the soil particle surface. =0.27nm, The gyromagnetic ratio of the proton. The gyromagnetic ratio of surface ions. To reduce Planck's constant, The spin quantum number of the paramagnetic center. For surface diffusion time, The residence time of water molecules on the pore surface. Let be the Larmor angular velocity of the proton.
8. A device for testing the water content of strong adsorption, characterized in that, The device includes: The detection unit obtains water density, detects soil, and obtains the pore surface area, pore volume, and specific surface area of the soil where pore water is located. The soil is detected using a nuclear magnetic resonance spectrometer to obtain the longitudinal relaxation time of pore water. A nuclear magnetic resonance variable field experiment is performed on the soil to obtain the relaxation time of the strongly adsorbed water layer on the surface of soil particles. The calculation unit obtains the longitudinal relaxation rate based on the longitudinal relaxation time of pore water, the pore surface area where pore water is located, and the pore volume where pore water is located. Based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles, the thickness of the strongly adsorbed water layer on the surface of soil particles is obtained. Based on the specific surface area of soil, the thickness of the strongly adsorbed water layer on the surface of soil particles, and the water density, the content of strongly adsorbed water in soil is obtained. The method of obtaining the thickness of the strongly adsorbed water layer on the surface of soil particles based on the longitudinal relaxation rate and the relaxation time of the strongly adsorbed water layer on the surface of soil particles includes: The thickness of the strongly adsorbed water layer on the surface of soil particles is obtained using the following formula: in, The thickness of the strongly adsorbed water layer on the surface of soil particles. The longitudinal relaxation rate, The relaxation time is the time when the water layer on the surface of soil particles is strongly adsorbed.
9. A computer-readable storage medium having a computer program stored thereon, the computer program including executable instructions that, when executed by a processor, implement the method as claimed in any one of claims 1-7.