Macro-micro test system and method suitable for analyzing static intermittent settling behavior

Abstract

This invention belongs to the field of solid-liquid two-phase flow testing technology, and provides a macro- and micro-scale testing system and method suitable for analyzing static intermittent sedimentation behavior. The system includes an integral model cylinder, several segmented assembled model cylinders, an intelligent real-time micro-monitoring system, a macro-testing system, and a data analysis system. The intelligent real-time micro-monitoring system performs online real-time monitoring of the microstructural characteristics of the samples in the integral and segmented assembled model cylinders. The macro-testing system performs physical and mechanical property tests on the samples in the integral and segmented assembled model cylinders. The data analysis system processes and analyzes the acquired data. This invention achieves real-time monitoring of macro-scale test data and micro-structural characteristics during static intermittent sedimentation behavior tests, enabling the analysis of intermittent sedimentation behavior of solid-liquid two-phase flow samples through a combined macro- and micro-scale approach, and establishing macro- and micro-scale evaluation criteria for the stable state of static intermittent sedimentation.

Description

Technical Field

[0001] This invention belongs to the field of solid-liquid two-phase flow test technology, specifically relating to a macroscopic and microscopic test method and system suitable for analyzing static intermittent sedimentation behavior. Background Technology

[0002] In fields such as marine science, water conservancy, civil engineering, environment, energy, and chemical engineering, research on solid-liquid two-phase flow generally only analyzes the static intermittent sedimentation behavior from a macroscopic perspective. Current technologies do not provide real-time testing and analysis of the sedimentation behavior of solid-liquid two-phase flow that combines macroscopic and microscopic perspectives, thus hindering in-depth research on related scientific issues in fields such as marine science and water conservancy. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a macro-micro experimental system suitable for analyzing static intermittent sedimentation behavior.

[0004] Another objective of this invention is to provide a macro- and micro-scale experimental method suitable for analyzing static intermittent sedimentation behavior.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A macro-micro experimental system suitable for analyzing static intermittent settlement behavior includes an integral model cylinder for establishing a steady-state evaluation standard for static intermittent settlement, several segmented assembled model cylinders for obtaining physical and mechanical indicators during static intermittent settlement, an intelligent real-time micro-monitoring system for tracking and monitoring the micro-structural characteristics of the sample, a macro-experimental system for obtaining the macro-physical and mechanical indicators of the sample, and a data analysis system.

[0007] The intelligent real-time microscopic monitoring system performs online real-time monitoring of the microstructural characteristics of the samples in the integral model cylinder and several segmented assembled model cylinders, and transmits the monitored data to the data analysis system.

[0008] The macroscopic testing system performs physical and mechanical property tests on the samples in the integral model cylinder and several segmented assembled model cylinders, and transmits the obtained data to the data analysis system.

[0009] The data analysis system processes and analyzes the acquired data.

[0010] Preferably, the intelligent real-time microscopic monitoring system includes a host, an imaging probe, and a supporting software system; when performing online real-time monitoring of the sample in the integral model cylinder, the imaging probe is positioned at the central axis of the inner cavity of the integral model cylinder.

[0011] Preferably, the macroscopic testing system includes a physical and mechanical index testing device, a consolidation apparatus, and a shear apparatus.

[0012] Preferably, the segmented assembly model cylinder includes multiple cylinders, which are spliced ​​together in a vertical direction to form the segmented assembly model cylinder, and the multiple cylinders are connected by loose flanges.

[0013] Preferably, the outer surface of the integral model cylinder is provided with graduations. The interfacial distance between the clarified liquid and the settled solids is periodically read according to the graduations on the integral model cylinder in order to plot a curve showing the change in interfacial sedimentation over time.

[0014] Macro- and micro-scale experimental methods applicable to the analysis of static intermittent settlement behavior include the following steps:

[0015] S1. Load the solid-liquid two-phase flow sample into the integral model cylinder, process the solid-liquid two-phase flow sample to form a typical sample, and start the static intermittent sedimentation test.

[0016] S2. Conduct interfacial sedimentation tracking tests between the clear liquid and the settled solids in a typical sample in an integral model cylinder to obtain the curve of interfacial sedimentation changing over time; use an intelligent real-time microscopic monitoring system to track and analyze the microscopic structural characteristics of the solid phase evolution in the typical sample in real time to obtain the curve of the microscopic structural characteristics changing over time; use a macroscopic experimental system to detect and analyze the physical and mechanical properties of the solid phase evolution in the typical sample to obtain the curve of the physical and mechanical properties changing over time.

[0017] S3. Combining the curves of interface sedimentation over time, the curves of microstructural characteristics over time, and the curves of physical and mechanical properties over time, analyze and determine whether the typical sample has reached a stable state of static intermittent sedimentation, and record multiple typical sedimentation times of the typical sample during the static intermittent sedimentation test.

[0018] Once the typical sample in the monolithic model cylinder reaches a stable state of static intermittent settling, proceed to step S4.

[0019] S4. Obtain a steady-state sample that has reached a stable settling state in the integral model cylinder, and test the steady-state sample using the physical and mechanical index testing device in the macroscopic test system to obtain the physical and mechanical index of the steady-state sample.

[0020] S5. Based on the physical and mechanical properties of the steady-state sample, and the curves of interface settlement changing with time, microstructural features changing with time, and physical and mechanical properties changing with time when the static intermittent settlement steady state is reached in step S3, establish macro- and micro-evaluation standards for typical samples reaching the static intermittent settlement steady state.

[0021] S6. Make multiple sets of segmented assembly model cylinders, load the same solid-liquid two-phase flow sample into each of the multiple sets of segmented assembly model cylinders, process the solid-liquid two-phase flow sample, form a test sample in each set of segmented assembly model cylinders, and start the static intermittent sedimentation test.

[0022] The height settings of the multiple cylinders in each set of segmented assembled model cylinders are designed according to the curve of interface settlement changing with time when the static intermittent settlement stabilization state is reached in step S3.

[0023] S7. Based on the multiple typical sedimentation times recorded in step S3, the physical and mechanical index testing devices of the intelligent real-time micro-monitoring system and macro-experimental system are used to monitor the micro-structure characteristics and detect the physical and mechanical indexes of the test samples in multiple sets of segmented assembled model cylinders, and obtain the typical micro-structure characteristic data and typical physical and mechanical index data of the test samples during the static intermittent sedimentation process.

[0024] S8. Based on the macro- and micro-evaluation criteria of the static intermittent sedimentation stability state obtained in step S5, and combined with the data obtained in step S7, summarize and analyze the macro- and micro-behavior of the static intermittent sedimentation of the solid-liquid two-phase flow sample.

[0025] Preferably, in step S7, the intelligent real-time microscopic monitoring system monitors the microstructural characteristics of the test sample in the segmented assembled model cylinder, including the average chord length, average porosity, and average fractal dimension.

[0026] Preferably, step S7 also includes an in-situ vane shear test; based on the macro- and micro-evaluation criteria of multiple typical sedimentation times recorded in step S3 and the static intermittent settling stability state in step S5, an in-situ testing test is conducted on test samples at different heights in the segmented assembled model cylinder using a shear tester to obtain shear strength data.

[0027] Preferably, step S7 further includes a consolidation compression test; based on the macro- and micro-evaluation criteria of multiple typical deposition times recorded in step S3 and the static intermittent settlement stability state in step S5, a consolidation instrument is used to obtain test samples in the segmented assembled model cylinder in the intermittent settlement stability state for consolidation compression test to obtain consolidation deformation characteristic data.

[0028] Preferably, in step S7, the physical and mechanical index testing device of the macroscopic test system detects the physical and mechanical indexes of the test sample in the segmented assembled model cylinder, including particle specific gravity, moisture content, density, liquid limit and plastic limit, and particle composition.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] The macro-micro experimental system of the present invention enables the detection of macroscopic experimental data and real-time monitoring of microstructural characteristics during static intermittent sedimentation behavior tests, so as to analyze the intermittent sedimentation behavior of solid-liquid two-phase flow samples through a combination of macro- and micro-scale methods.

[0031] The macro- and micro-scale experimental method of this invention utilizes a segmented assembled model cylinder, which solves the problems of in-situ testing and sampling difficulties in the integral model cylinder test method, and is conducive to obtaining accurate results of relevant tests at different depths in a targeted manner. In addition, the macro- and micro-scale evaluation criteria for static intermittent settlement stability during the test process are based on a unified theoretical judgment expression established by macro- and micro-scale indicators such as the curve of interface settlement changing with time, the curve of micro-structure characteristics changing with time, and the physical and mechanical indicators of steady-state samples. This solves the long-standing problem that has plagued scholars: "the traditional method of judging solely based on the curve characteristics of interface settlement changing with time leads to the one-sidedness of the conclusions due to the inability to unify and theorize." Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the macro-microscopic experimental system of the present invention, which is suitable for analyzing static intermittent sedimentation behavior.

[0034] Figure 2 This is a graph showing the variation of mud surface settlement value with deposition time when establishing macro- and micro-evaluation criteria for a static intermittent settlement steady state.

[0035] Figure 3 This is a graph showing the variation of average water content with sedimentation time when establishing macro- and micro-level evaluation criteria for a static intermittent sedimentation steady state.

[0036] Figure 4 This is a graph showing the variation of average wet density with sedimentation time when establishing macro- and micro-evaluation criteria for a static intermittent sedimentation steady state.

[0037] Figure 5 This is a graph showing the variation of average porosity with deposition time when establishing macro- and micro-evaluation criteria for a static intermittent settling steady state.

[0038] Figure 6 This is a graph showing the relationship between mud surface settlement and average void ratio when establishing macro- and micro-evaluation criteria for static intermittent settlement stability.

[0039] Figure 7 This is a graph showing the relationship between average water content and average void ratio when establishing macro- and micro-level evaluation criteria for static intermittent settling stability.

[0040] Figure 8 This is a graph showing the relationship between average wet density and average void ratio when establishing macro- and micro-evaluation criteria for static intermittent settlement stability.

[0041] Figure 9 The curves show the relationship between the cumulative change rate of porosity and deposition time under different conditions.

[0042] in:

[0043] 1-Data analysis system, 2-Intelligent real-time microscopic monitoring system, 3-Integral model cylinder, 4-Segmented assembly model cylinder, 41-Cylinder body, 42-Loose flange. Detailed Implementation

[0044] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be 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 this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0046] Example 1

[0047] See Figure 1This embodiment discloses a macro-microscopic experimental system suitable for analyzing static intermittent settlement behavior, including an integral model cylinder 3 for establishing a steady-state evaluation standard for static intermittent settlement, several segmented assembled model cylinders 4 for acquiring physical and mechanical indicators during static intermittent settlement, an intelligent real-time microscopic monitoring system 2 for tracking and monitoring the microstructural characteristics of samples, a macroscopic experimental system for acquiring macroscopic physical and mechanical indicators of samples, and a data analysis system 1. The intelligent real-time microscopic monitoring system 2 performs online real-time monitoring of the microstructural characteristics of samples in the integral model cylinder 3 and several segmented assembled model cylinders 4, and transmits the monitored data to the data analysis system 1. The macroscopic experimental system performs physical and mechanical indicator tests on samples in the integral model cylinder 3 and several segmented assembled model cylinders 4, and transmits the detected data to the data analysis system 1. The data analysis system 1 processes and analyzes the acquired data. The data analysis system 1 includes a computer and a data post-processing analysis system, which includes a professional post-processing software system corresponding to the intelligent real-time microscopic monitoring system 2 and a professional post-processing software system corresponding to the macroscopic experimental system.

[0048] Furthermore, the intelligent real-time microscopic monitoring system 2 includes a host, an imaging probe, and supporting software system. When performing online real-time monitoring of the sample in the integral model cylinder 3, the imaging probe is positioned at the central axis of the inner cavity of the integral model cylinder 3, and the imaging probe is 20 cm away from the bottom of the inner cavity of the integral model cylinder 3. Specifically, the intelligent real-time microscopic monitoring system 2 of this embodiment employs PVM particle microscopy technology, a miniaturized probe-type microscopy technique. The PVM probe can be directly placed in a solid-liquid two-phase flow to perform real-time online monitoring of the microstructure of solid or liquid particles, obtaining microscopic images of the shape, size changes, and polymerization / breakage phenomena of the research object, without requiring sampling, dilution, or sample preparation of the observed object.

[0049] Furthermore, the macroscopic testing system includes a physical and mechanical property testing device, a consolidation apparatus, and a shear apparatus. The physical and mechanical property testing device includes specific gravity testing equipment, moisture content testing equipment, density testing equipment, particle size analysis testing equipment, and limit moisture content testing equipment as specified in the "Standard for Geotechnical Testing Methods" (GB T 50123-2019).

[0050] See Figure 1The segmented assembly model cylinder 4 includes multiple cylinders 41, which are assembled vertically to form the segmented assembly model cylinder 4. The multiple cylinders 41 are connected by loose flanges 42. Specifically, in this embodiment, the splicing ends of the cylinders 41 are provided with radially extending flanges, and sealing rings are provided between the splicing end faces of two cylinders 41 to improve the sealing effect and prevent leakage. There are four cylinders 41, forming four segments in the height direction of the segmented assembly model cylinder 4. Further, the dimensions of the segmented assembly model cylinder 4 are φ25cm×130cm, and the cylinder wall has graduated scales.

[0051] In this embodiment, the outer surface of the integral model cylinder 3 is provided with graduations. Based on the graduations on the integral model cylinder 3, the interfacial distance between the clarified liquid and the settled solids is read periodically to plot a curve showing the change in interfacial sedimentation over time. Specifically, the integral model cylinder 3 is made of acrylic sheet with dimensions of φ25cm × 130cm.

[0052] This embodiment also discloses a macro- and micro-scale experimental method suitable for analyzing static intermittent settlement behavior, including the following steps:

[0053] S1. Load the solid-liquid two-phase flow sample into the integral model cylinder, process the solid-liquid two-phase flow sample to form a typical sample, and start the static intermittent sedimentation test.

[0054] S2. Conduct interfacial sedimentation tracking tests between the clear liquid and the settled solids in a typical sample in an integral model cylinder to obtain the curve of interfacial sedimentation changing over time; use an intelligent real-time microscopic monitoring system to track and analyze the microscopic structural characteristics of the solid phase evolution in the typical sample in real time to obtain the curve of the microscopic structural characteristics changing over time; use a macroscopic experimental system to detect and analyze the physical and mechanical properties of the solid phase evolution in the typical sample to obtain the curve of the physical and mechanical properties changing over time.

[0055] S3. Combining the curves of interface settlement over time, microstructural features over time, and physical and mechanical properties over time, analyze and determine whether the typical sample has reached a stable state of static intermittent settlement, and record multiple typical deposition times of the typical sample during the static intermittent settlement test; and provide data support for the height of each loose flange section in the segmented assembled model cylinder of the static intermittent settlement test.

[0056] Once the typical sample in the monolithic model cylinder reaches a stable state of static intermittent settling, proceed to step S4.

[0057] S4. Obtain a steady-state sample that has reached a stable settling state in the integral model cylinder, and test the steady-state sample using the physical and mechanical index testing device in the macroscopic test system to obtain the physical and mechanical index of the steady-state sample.

[0058] S5. Based on the physical and mechanical properties of the steady-state sample, and the curves of interface settlement changing with time, microstructural characteristics changing with time, and physical and mechanical properties changing with time when reaching the static intermittent settlement steady state in step S3, establish macro- and micro-evaluation standards for typical samples reaching the static intermittent settlement steady state; preferably, in this embodiment, the cumulative change rate of average porosity is used as one of the evaluation indicators in the macro- and micro-evaluation standards for reaching the static intermittent settlement steady state (see below for detailed analysis).

[0059] S6. Fabricate multiple sets of segmented assembled model cylinders, and load the same solid-liquid two-phase flow sample into each of the multiple sets of segmented assembled model cylinders. Process the solid-liquid two-phase flow sample to form a test sample in each set of segmented assembled model cylinders, and start the static intermittent sedimentation test. In this step, the height of the multiple cylinders of each set of segmented assembled model cylinders is designed according to the curve of interface sedimentation changing with time when the static intermittent sedimentation steady state is reached in step S3.

[0060] S7. Based on the multiple typical sedimentation times recorded in step S3, the physical and mechanical index testing devices of the intelligent real-time micro-monitoring system and macro-experimental system are used to monitor the micro-structure characteristics and detect the physical and mechanical indexes of the test samples in multiple sets of segmented assembled model cylinders, and obtain the typical micro-structure characteristic data and typical physical and mechanical index data of the test samples during the static intermittent sedimentation process.

[0061] Simultaneously, based on the macro- and micro-evaluation criteria of multiple typical deposition times recorded in step S3 and the static intermittent settlement stability state in step S5, in-situ vane shear tests and consolidation compression tests are conducted. In the in-situ vane shear test, a shearing instrument is used to conduct in-situ testing on test samples at different heights in the segmented assembled model cylinder to obtain shear strength data. In the consolidation compression test, a consolidation instrument is used to obtain test samples in the segmented assembled model cylinder in the intermittent settlement stability state to conduct consolidation compression tests and obtain consolidation deformation characteristic data.

[0062] S8. Based on the macro- and micro-evaluation criteria of the static intermittent settling stability state obtained in step S5, and combined with the data obtained in step S7 (typical microstructure characteristics data, typical physical and mechanical index data, shear strength data, and consolidation deformation characteristics data, etc.), summarize and analyze the macro- and micro-behavior of the static intermittent settling of the solid-liquid two-phase flow sample.

[0063] Specifically, in step S8, the intelligent real-time microscopic monitoring system monitors the microstructural characteristics of the test sample in the segmented assembled model cylinder, including the average chord length, average porosity, and average fractal dimension. The physical and mechanical index testing device of the macroscopic test system detects the physical and mechanical indexes of the test sample in the segmented assembled model cylinder, including particle specific gravity, moisture content, density, liquid limit, and particle composition.

[0064] In steps S1 and S6 of this embodiment, the configuration of typical samples and test samples can be referred to the following steps: (1) Obtain silt from typical engineering projects in the marine field; (2) Use brine containing about 3% salt instead of seawater as indoor dilution water to prepare solid-liquid two-phase flow (floating mud) samples; (3) Seal the samples for 24 hours to allow the solid particles to be fully wetted; (4) Stir evenly using a motorized stirrer.

[0065] In step S3 of this embodiment, multiple typical sedimentation times can be flexibly selected according to actual conditions, such as based on the variation in the amplitude of interface settlement. Furthermore, in step S3, the final settlement amount of the mud surface is determined based on the curve of interface settlement changing over time, and the steady-state mud surface height under stable settlement conditions is calculated based on the final settlement amount. This steady-state mud surface height is used as the position of one of the loose flanges. Subsequently, based on specific experimental conditions, the curve of interface settlement changing over time, and the height value desired by the experimenters, the positions of other loose flanges are flexibly set, ultimately determining the height of all cylinders accordingly.

[0066] In the consolidation compression test of step S7 in this embodiment, a self-made large-scale mud consolidation apparatus is used to conduct a consolidation test under ultra-low load on the test samples in the segmented assembled model cylinder that have reached intermittent settlement stability. The water content, density, void ratio, and vane shear strength of each test sample in the current consolidation state are tested during the consolidation process to analyze its consolidation deformation characteristics. The consolidation compression test scheme is detailed in the table below. The loading times for each level in the table are based on the time required for a 2cm height specimen in the Geotechnical Testing Procedure SL 237-1999. Loading levels 1 to 4 are to ensure that the soil sample is not crushed.

[0067]

[0068] To provide a specific macro- and micro-level evaluation standard for the stable state of static intermittent settlement, this embodiment discloses a test method for recently reclaimed silt samples from Nansha and Huizhou. Specifically, see [link to relevant documentation]. Figures 2-5It can be observed that after 30 days of self-weight deposition, the various indicators (mud surface settlement, average soil moisture content, average soil wet density, and average soil void ratio) of the Group I Nansha samples generally stabilized, while the Group II Huizhou samples required 91 days of self-weight deposition for these indicators to stabilize. The main reason for this is that the clay content in the Group II Huizhou samples is much higher than that in the Group I Nansha samples. This directly leads to a slower self-weight deposition rate in the Group II Huizhou samples, and the average soil moisture content and average soil void ratio after deposition stabilization are approximately twice that of the Group I Nansha samples. Therefore, considering other physical and mechanical indicators and microstructural characteristics, the above indicators (including deposition time) should not be directly used as a unified evaluation standard for the self-weight deposition stability of newly filled silt from different geographical locations.

[0069] Further, see Figures 6-8 It can be observed that the mud surface settlement, average moisture content, and average wet density of Group I Nansha samples and Group II Huizhou samples are basically linearly related to the average void ratio. Considering that void ratio can be used to evaluate the compactness of soil structure, this embodiment uses the "average void ratio" physical and mechanical index as the core evaluation index for the self-weight deposition stability of newly filled silt in different geographical locations.

[0070] However, the origins of recently reclaimed silt from different geographical locations can vary significantly, often resulting in substantial differences in their average porosity. Therefore, this embodiment introduces the "cumulative change rate of average porosity" as a dimensionless index for evaluating the gravity sedimentation stability of recently reclaimed silt from different geographical locations. Since the gravity sedimentation stability of recently reclaimed silt is influenced by various factors, such as the sedimentation environment (seawater and freshwater), sedimentation space dimensions (diameter and height of the indoor sedimentation tube), initial mud density, initial clay content, initial water content, and initial porosity, the cumulative change rate of porosity during indoor settling of recently reclaimed silt under different conditions was statistically analyzed. The statistical results are shown in [link to statistical data]. Figure 9 As shown in the figure, the cumulative change rate of the average porosity after the self-weight deposition of recently filled silt in different geographical locations ranged from 39.6% to 75.5%. Furthermore, previous studies have indicated that the larger the cross-sectional size of the sedimentation chamber, the less the viscous resistance between the mud and the container wall affects the self-weight deposition of recently filled silt. Therefore, the size of the sedimentation space, especially the cross-sectional size (such as the diameter), is one of the important factors affecting the stability of the self-weight deposition of recently filled silt. In view of this, based on the experimental results of Group I Nansha samples and Group II Huizhou samples in this embodiment, this embodiment uses a cumulative change rate of the average porosity of 60%–70% as one of the unified evaluation indicators for the stability of the self-weight deposition of recently filled silt in different geographical locations.

[0071] The evaluation criteria for the static intermittent settling behavior of other physical and mechanical indicators and microstructural features in this embodiment can be found in the method described above. Based on the relevant data of typical samples in the monolithic model cylinder when they reach a stable state, appropriate physical and mechanical indicators and microstructural features are selected as evaluation indicators. Multiple evaluation indicators constitute the macro- and micro-evaluation criteria for reaching a stable static intermittent settling state, so as to conduct subsequent evaluations of the static intermittent settling macro- and micro-evaluation behavior of test samples in the segmented assembled model cylinder. For example, the clay content in the physical and mechanical indicators can be used as one of the evaluation indicators; specifically, a larger value can be taken when the clay content is less than 50%, and a smaller value can be taken when the clay content is greater than 50%. The average fractal dimension in the microstructural features can be used as one of the evaluation indicators. Combining the three evaluation indicators proposed in this embodiment (cumulative change rate of average porosity, clay content, and average fractal dimension), a macro- and micro-evaluation criteria for the stable static intermittent settling state is thus constituted.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. Macro-micro test method suitable for the analysis of static intermittent settling behaviour, characterised in that, A macro-micro test system suitable for analyzing static intermittent sedimentation behavior is adopted, wherein the macro-micro test system comprises a whole model cylinder for establishing a static intermittent sedimentation steady state evaluation standard, a plurality of sectional assembly model cylinders for obtaining physical and mechanical indexes in a static intermittent sedimentation process, an intelligent real-time micro-monitoring system for tracking and monitoring microstructure characteristics of a sample, a macro test system for obtaining macro physical and mechanical indexes of a sample, and a data analysis system; The intelligent real-time micro-monitoring system performs online real-time microstructure characteristic monitoring on the sample in the whole model cylinder and the plurality of sectional assembly model cylinders, and transmits the monitored data to the data analysis system; The macro test system performs physical and mechanical index testing on the sample in the whole model cylinder and the plurality of sectional assembly model cylinders, and transmits the detected data to the data analysis system; The data analysis system processes and analyzes the obtained data; The macro-micro test method comprises the following steps: S1, loading a solid-liquid two-phase flow sample into the whole model cylinder, processing the solid-liquid two-phase flow sample, forming a typical sample, and starting a static intermittent sedimentation test; S2, performing interface sedimentation tracking test on the typical sample in the whole model cylinder, obtaining an interface sedimentation curve changing with time; tracking and analyzing the microstructure characteristics of the solid phase evolution of the typical sample in real time through the intelligent real-time micro-monitoring system, obtaining a microstructure characteristic curve changing with time; detecting and analyzing the physical and mechanical indexes of the solid phase evolution of the typical sample through the macro test system, and obtaining a physical and mechanical index curve changing with time; S3, combining the interface sedimentation curve changing with time, the microstructure characteristic curve changing with time, and the physical and mechanical index curve changing with time, analyzing and judging whether the typical sample reaches a static intermittent sedimentation steady state, and recording a plurality of typical deposition times of the typical sample in the static intermittent sedimentation test process; When the typical sample in the whole model cylinder reaches the static intermittent sedimentation steady state, step S4 is performed; S4, obtaining a steady state sample reaching the sedimentation steady state in the whole model cylinder, testing the steady state sample through the physical and mechanical index testing device in the macro test system, and obtaining the physical and mechanical indexes of the steady state sample; S5, establishing a macro-micro evaluation standard for the typical sample reaching the static intermittent sedimentation steady state according to the physical and mechanical indexes of the steady state sample, and the interface sedimentation curve changing with time, the microstructure characteristic curve changing with time, and the physical and mechanical index curve changing with time when reaching the static intermittent sedimentation steady state in step S3; one of the evaluation indexes of the macro-micro evaluation standard is an average cumulative change rate of the pore ratio; S6, making a plurality of sectional assembly model cylinders, respectively loading the same solid-liquid two-phase flow sample into the plurality of sectional assembly model cylinders, processing the solid-liquid two-phase flow sample, forming a test sample in each sectional assembly model cylinder, and starting a static intermittent sedimentation test; The height of the plurality of cylinders of each of the segmented assembly type model cylinders is set according to the curve of the interface settlement changing over time when the static intermittent sedimentation reaches the stable state in step S3. S7, based on the plurality of typical deposition times recorded in step S3, using the physical and mechanical index testing device of the intelligent real-time microstructure monitoring system and the macroscopic test system to monitor the microstructure characteristics and detect the physical and mechanical indexes of the test samples in the plurality of segmented assembly type model cylinders, to obtain the typical microstructure characteristic data and the typical physical and mechanical index data of the test samples in the static intermittent sedimentation process; S8, based on the macro-microscopic evaluation standard of the static intermittent sedimentation stable state in step S5, and combined with the data obtained in step S7, the static intermittent sedimentation macro-microscopic behavior of the solid-liquid two-phase flow sample is summarized and analyzed. In step S7, the intelligent real-time microstructure monitoring system monitors the microstructure characteristics of the test samples in the segmented assembly type model cylinder, including average chord length, average porosity, and average fractal dimension.

2. The meso-microscale test method suitable for analyzing static intermittent settling behavior according to claim 1, characterized in that, The intelligent real-time microstructure monitoring system includes a host computer, an imaging probe, and a supporting software system; when the test sample in the integral type model cylinder is monitored online in real time, the imaging probe is arranged at the central axis position of the inner cavity of the integral type model cylinder.

3. The meso-microscale testing method suitable for analyzing static intermittent settling behavior according to claim 1, characterized in that, The macroscopic test system includes a physical and mechanical index testing device, a consolidation instrument, and a shear instrument.

4. The meso-microscale testing method suitable for analyzing static intermittent settling behavior according to claim 1, characterized in that, The segmented assembly type model cylinder includes a plurality of cylinders, and the plurality of cylinders are vertically spliced and combined to form the segmented assembly type model cylinder, and the plurality of cylinders are connected through a live flange.

5. The meso-microscale testing method suitable for analyzing static intermittent settling behavior according to claim 1, characterized in that, The outer surface of the integral type model cylinder is provided with a scale.

6. The meso-microscale testing method suitable for analyzing static intermittent settling behavior according to claim 1, characterized in that, In step S7, it also includes an in-situ vane shear test; based on the plurality of typical deposition times recorded in step S3 and the macro-microscopic evaluation standard of the static intermittent sedimentation stable state in step S5, the shear instrument of the macroscopic test system is used to perform in-situ test on the test samples at different heights in the segmented assembly type model cylinder, to obtain the shear strength data.

7. The meso-microscale testing method suitable for analyzing static intermittent settling behavior according to claim 6, characterized in that, In step S7, it also includes a consolidation compression test; based on the plurality of typical deposition times recorded in step S3 and the macro-microscopic evaluation standard of the static intermittent sedimentation stable state in step S5, the consolidation instrument of the macroscopic test system is used to perform a consolidation compression test on the test samples in the intermittent sedimentation stable state in the segmented assembly type model cylinder, to obtain the consolidation deformation characteristic data.

8. The meso-microscale test method suitable for analyzing static intermittent settling behavior according to claim 7, characterized in that, In step S7, the physical and mechanical index testing device of the macroscopic test system detects the physical and mechanical indexes of the test samples in the segmented assembly type model cylinder, which also includes particle specific gravity, water content, density, liquid plastic limit, and particle composition.

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