Test method, test system, and computer equipment for slurry penetration consolidation rate

Abstract

The present invention discloses a method, system, and computer device for testing the permeability and consolidation rate of slurry. The method comprises: S1. pouring standard sand into a cylindrical testing device, leveling the surface of the standard sand in the cylindrical testing device, and measuring the height H of the standard sand in the cylindrical testing device; S2. slowly pouring a volume of slurry #imgabs0# into the cylindrical testing device; S3. placing the cylindrical testing device into a steel sleeve, blocking the opening of the cylindrical testing device with an airbag, and applying pressure to the cylindrical testing device through a pressurizing device. The mixture of standard sand and slurry is pressurized to p, and the pressure is maintained for a time t, allowing the slurry to fully penetrate the standard sand; S4. removing the pressurizing device, measuring the overall height h of the mixture of slurry and standard sand after complete penetration, and calculating the pressure permeability consolidation rate index #imgabs1#. Using the pressure permeability consolidation rate index as an evaluation indicator, accurate quantitative evaluation of the permeability and consolidation performance of slurry in formations can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of measurement and testing technology, and in particular to a testing method, a testing system and a computer device for slurry penetration and consolidation rate. Background Art

[0002] Grouting technology is widely used in geotechnical reinforcement, crack filling, and anti-seepage projects. Its core objective is to determine whether the grout can effectively penetrate the target pores and consolidate to form a stable structure. Grout permeability and consolidation performance are essential research topics in geotechnical engineering, particularly in civil engineering, mine reinforcement, and underground space development. Grout permeability directly determines its filling effectiveness, while consolidation performance is a key factor in ensuring ultimate strength and stability. Therefore, effective evaluation of grout permeability and consolidation performance is a pressing issue in current engineering construction.

[0003] Currently, the main methods for evaluating the permeability and consolidation properties of slurries include fluidity testing, simulated formation experiments, and microscopic model observations. While these methods provide a reference for evaluating slurry properties to a certain extent, they suffer from numerous technical deficiencies, making it impossible to accurately and comprehensively characterize the performance of slurries in actual engineering applications.

[0004] Disadvantages of liquidity testing:

[0005] Fluidity testing typically indirectly characterizes the slurry's permeability through parameters such as Marsh funnel viscosity and fluidity. This testing method primarily focuses on the fluidity of the slurry. However, fluidity cannot directly reflect the actual permeability behavior of the slurry in porous media, especially under varying pressure conditions. Conventional fluidity testing often ignores the synergistic effects of permeation and consolidation, leading to the following problems:

[0006] (1) Underestimation of the potential of high-viscosity slurries: Some high-viscosity slurries may enhance permeability through shear thinning or compression of pore gas under pressure, but experiments under normal pressure may misjudge them as “unusable”.

[0007] (2) Overestimation of the performance of low-viscosity slurries: Low-viscosity slurries are easy to penetrate under normal pressure, but under pressurized conditions, they may destroy the consolidated structure due to turbulent erosion. Existing test methods cannot effectively predict such risks.

[0008] This fragmented evaluation system results in the slurry that performs well in the laboratory to suffer from problems such as voiding and leakage in actual engineering due to the failure of the synergistic infiltration-consolidation.

[0009] Disadvantages of simulated formation experiments:

[0010] The simulated formation experiment simulates the actual formation through natural sand or artificial proportioned soil to test the diffusion radius and consolidation strength of the slurry. Although this method can reflect the permeability of the slurry to a certain extent, the natural sand gradation fluctuates greatly, the repeatability of the test results is poor, and it is difficult to establish a unified evaluation standard between different experiments. The experimental results under different formation conditions vary greatly, affecting the accuracy and comparability of the slurry performance evaluation. Secondly, the simulated formation experiment is difficult to truly reproduce the pressurized environment in the project and can usually only be carried out under normal pressure, which is quite different from the high-pressure conditions in the actual grouting process.

[0011] In addition, some researchers use the method of accurately weighing the quality of natural sand or artificial proportioned soil before and after the test. After the slurry is injected and consolidated, the consolidated body is taken out and the unconsolidated part is removed by screening, dissolving the unconsolidated part, etc., and the standard sand mass after consolidation is weighed. , and use this to calculate the consolidation rate: However, it is obviously difficult to accurately separate the unconsolidated part, especially the solidified body of chemical slurry, which has low strength. Different people have very different separation techniques. Even for the same slurry, the results of different people's operations may be very different. It is not practical at all in actual work, and the results are not comparable.

[0012] Shortcomings of microscopic model observations:

[0013] The microscopic model observation method utilizes a transparent pore model combined with image analysis technology to track the slurry's permeation process. While this method can theoretically accurately observe the slurry's permeation behavior, in practice, the equipment is complex and costly, theoretical calculations are impossible, and the consolidation effect cannot be effectively quantified. Therefore, while it can provide some experimental data, it remains difficult to fully evaluate the slurry's permeability and consolidation properties. Furthermore, microscopic observation techniques cannot fully assess the slurry's consolidation performance, especially under high-pressure environments.

[0014] In summary, the existing slurry permeability and consolidation performance evaluation methods have significant limitations and cannot provide standardized performance indicators, resulting in large deviations in the applicability evaluation of different slurries in engineering applications. Summary of the Invention

[0015] The technical problem to be solved by the present invention is that existing methods for evaluating the permeability and consolidation performance of slurries have significant limitations and fail to provide standardized performance indicators, resulting in large deviations in the evaluation of the suitability of different slurries for engineering applications. To this end, the present invention provides a method, testing system, and computer equipment for testing the permeability and consolidation rate of slurries.

[0016] The technical solution adopted by the present invention to solve its technical problem is:

[0017] In a first aspect, a method for testing the slurry permeability consolidation rate comprises the following steps:

[0018] S1. Pour standard sand into a cylindrical test device with a radius of The porosity of the standard sand poured in is , with a weight of M, after adjusting the surface of the standard sand in the cylindrical test device to a horizontal level, measure the height H of the standard sand in the cylindrical test device;

[0019] S2, take the volume The slurry is slowly poured into the cylindrical test device, and the slurry gradually penetrates into the gaps of the standard sand;

[0020] S3. Place the cylindrical test device into a steel sleeve, so that the cylindrical test device fits against the inner wall of the steel sleeve. Use an airbag to block the opening of the cylindrical test device and apply pressure to the cylindrical test device through a pressurizing device. Pressurize the mixture of standard sand and slurry to p and hold the pressure for a time t, so that the slurry can fully penetrate the standard sand.

[0021] S4. Remove the pressure device, measure the overall height h of the mixture of slurry and standard sand after complete penetration, and calculate the pressure permeability consolidation rate index .

[0022] Furthermore, the pressure permeability consolidation rate index The calculation formula is:

[0023] ,

[0024] It represents the apparent density of the whole formed by standard sand and slurry after penetration consolidation;

[0025] It represents the maximum apparent density of the whole formed by standard sand and slurry after penetration consolidation;

[0026] Indicates the volume The weight of the slurry;

[0027] Indicates the shrinkage of the slurry at the end of the test;

[0028] The size of is related to the applied pressure p.

[0029] Furthermore, if the slurry solidification time is ≥30 minutes, the shrinkage rate =0; if the slurry solidification time is less than 30 minutes, the shrinkage rate shall be determined according to the slurry technical manual The value of .

[0030] Furthermore, the porosity of standard sand The calculation formula is:

[0031] ,

[0032] Indicates the bulk density of standard sand;

[0033] Indicates the particle density of standard sand.

[0034] Furthermore, the standard sand adopts sand that meets the ISO679:2009 standard.

[0035] In a second aspect, a slurry permeability and consolidation rate testing system is provided, which uses the slurry permeability and consolidation rate testing method described above, and the testing system includes:

[0036] A cylindrical test device, the cylindrical test device is used to carry standard sand and slurry, and the slurry will gradually penetrate into the pores of the standard sand;

[0037] A pressurizing device is used to install the cylindrical test device into a steel sleeve, and then use an air bag to block the opening of the cylindrical test device. The pressurizing device is used to apply pressure to the cylindrical test device so that the slurry can fully penetrate into the standard sand;

[0038] Calculation module for calculating pressure permeability consolidation index .

[0039] According to a third aspect, a computer device includes:

[0040] processor;

[0041] a memory for storing executable instructions;

[0042] The processor is used to read the executable instructions from the memory and execute the executable instructions to implement the test method of slurry permeability consolidation rate.

[0043] The beneficial effect of the present invention is that the testing method, testing system, and computer equipment for the slurry permeability consolidation rate of the present invention innovatively propose a "pressure permeability consolidation rate index" as an evaluation indicator, which can unify the evaluation standards; and a pressurizing device is added during the test process to simulate different pressure environments, which can break through the limitations of normal pressure experiments, simulate different pressure environments, and realize accurate quantitative evaluation of the permeability and solidification performance of the slurry in the formation.

[0044] The use of this evaluation index can overcome the limitations of traditional methods in the evaluation of slurry permeability and consolidation performance, and can more comprehensively and truly reflect the permeability and consolidation behavior of slurry in actual engineering. Under specific pressure or different pressure conditions, the pressure permeability consolidation rate index It can quantify the penetration and consolidation effect of slurry in standard sand medium, especially in the test of high viscosity or low viscosity slurry, the pressure penetration consolidation rate index It can more realistically reflect the performance of the slurry under actual construction conditions. It can not only test the penetration performance of the slurry under normal pressure, but also test the penetration performance of the slurry under pressure, providing an effective basis for the selection and application of the slurry in actual construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below with reference to the accompanying drawings and examples.

[0046] Figure 1 It is a flow chart of the testing method of the slurry penetration consolidation rate of the present invention.

[0047] Figure 2 It is a schematic diagram of the slurry penetration consolidation rate testing process of the present invention. DETAILED DESCRIPTION

[0048] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] Example 1

[0052] like Figures 1 to 2 As shown, the test method for slurry permeability consolidation rate provided in this embodiment includes the following steps:

[0053] S1. Pour standard sand into a cylindrical test device with a radius of The porosity of the standard sand poured in is , weight is M, after adjusting the surface of the standard sand in the cylindrical test device to be horizontal, measure the height H of the standard sand in the cylindrical test device.

[0054] S2, take the volume The slurry is slowly poured into the cylindrical test device, and the slurry will gradually penetrate into the gaps of the standard sand.

[0055] S3. Place the cylindrical test device into the steel sleeve so that the cylindrical test device fits the inner wall of the steel sleeve. Use an airbag to block the opening of the cylindrical test device and apply pressure to the cylindrical test device through a pressure device. Pressurize the mixture of standard sand and slurry to p and maintain the pressure for t so that the slurry can fully penetrate into the standard sand.

[0056] S4. Remove the pressure device, measure the overall height h of the mixture of slurry and standard sand after complete penetration, and calculate the pressure permeability consolidation rate index .

[0057] It should be noted that this embodiment innovatively proposes the "pressure permeability consolidation rate index" as an evaluation indicator, which can unify the evaluation standards; and adds a pressurizing device to simulate different pressure environments during the test process, which can break through the limitations of normal pressure experiments and realize accurate quantitative evaluation of the permeability and solidification performance of slurry in the formation.

[0058] Specifically, the pressure permeability consolidation rate index of this embodiment is The calculation formula is: ,in, It represents the apparent density of the whole formed by standard sand and slurry after penetration consolidation; It represents the maximum apparent density of the whole formed by standard sand and slurry after penetration consolidation; Indicates the volume The weight of the slurry; Indicates the shrinkage of the slurry at the end of the test; The magnitude of is related to the applied pressure p. That is, the value of the pressure permeability solidification rate index of this embodiment is related to H, h, The value of h is related to the pressure applied by the pressure device and the permeability of the slurry itself. The value range of is 0 to 1. Using this index as an evaluation indicator can overcome the limitations of the existing technology. For example, this embodiment can test the penetration consolidation performance of slurries with different viscosities under a specific pressure, different pressures, and different conditions.

[0059] In addition, the pressure permeability consolidation rate index of this embodiment is The shrinkage of the slurry is also taken into account. When the slurry is poured into the standard sand, it takes a while to solidify. Sometimes the test may end but the slurry has not yet completely solidified. In this case, if the permeability consolidation rate is directly calculated, the result will be inaccurate. For example, the setting time of acrylate is very short, but it will shrink or expand, which will affect the value of h. Therefore, in this embodiment, the pressure permeability consolidation rate index is Shrinkage rate is added To make corrections. Take the end of the test as the time node and record the shrinkage rate of the slurry If the slurry is in a contracted state, then Take the positive value, if the slurry is in the expansion state, then Take the negative. If the slurry solidification time is ≥30 minutes, the shrinkage rate =0; if the slurry solidification time is less than 30 minutes, the shrinkage rate shall be determined according to the slurry technical manual The value of .

[0060] In this embodiment, the standard sand used is sand that complies with ISO679:2009 standard. The production and porosity of this standard sand are relatively stable, which can improve the problem of discretization of the test medium. The calculation formula is: , Indicates the bulk density of standard sand; Indicates the particle density of standard sand.

[0061] This embodiment innovatively proposes the pressure permeability consolidation rate index The use of this evaluation index can overcome the limitations of traditional methods in the evaluation of slurry permeability and consolidation performance, and can more comprehensively and truly reflect the permeability and consolidation behavior of slurry in actual engineering. Under specific pressure or different pressure conditions, the pressure permeability consolidation rate index It can quantify the penetration and consolidation effect of slurry in standard sand medium, especially in the test of high viscosity or low viscosity slurry, the pressure penetration consolidation rate index It can more realistically reflect the performance of the slurry under actual construction conditions. It can not only test the penetration performance of the slurry under normal pressure, but also test the penetration performance of the slurry under pressure, providing an effective basis for the selection and application of the slurry in actual construction.

[0062] Pressure permeability consolidation index As an evaluation index, it can accurately evaluate the permeability and consolidation performance of slurry under different pressure conditions, which is very important for actual construction, especially in underground engineering, mine reinforcement and other scenarios. The permeability and consolidation performance of slurry directly affects the stability and long-term reliability of the project. The staff can choose more suitable grouting materials to avoid structural instability or permeability problems caused by improper slurry selection. For different slurries, the pressure permeability consolidation rate index It can also provide a standardized evaluation index, allowing for quantitative comparison of the permeability and consolidation performance of slurries under different concentrations, viscosities, and pressures, thereby avoiding the simple correlation between viscosity and permeability in fluid testing and ensuring that the evaluation results are more in line with actual engineering needs. It provides a standardized basis for evaluating the penetration and consolidation performance of slurry. Workers can optimize the penetration and consolidation effect of slurry by adjusting the slurry concentration, viscosity and applied pressure to adapt to different engineering needs.

[0063] Example 2

[0064] The slurry permeability consolidation rate test system of this embodiment adopts the slurry permeability consolidation rate test method. The test system includes: a cylindrical test device, which is used to carry standard sand and slurry, and the slurry will gradually penetrate into the pores of the standard sand; a pressure device, which is used to install the cylindrical test device into a steel sleeve, and then use an air bag to block the opening of the cylindrical test device, and use the pressure device to apply pressure to the cylindrical test device so that the slurry can fully penetrate into the standard sand; a calculation module, which is used to calculate the pressure permeability consolidation rate index .

[0065] Example 3

[0066] The computer device of this embodiment includes: a processor; a memory for storing executable instructions; wherein the processor is used to read the executable instructions from the memory and execute the executable instructions to implement a test method for slurry permeability consolidation rate.

[0067] In summary, the testing method, testing system, and computer equipment for the slurry permeability consolidation rate of the present invention innovatively propose a "pressure permeability consolidation rate index" as an evaluation indicator, which can unify the evaluation standards; and add a pressurizing device to simulate different pressure environments during the test process, which can break through the limitations of normal pressure experiments, simulate different pressure environments, and realize accurate quantitative evaluation of the permeability and solidification performance of slurry in the formation.

[0068] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical spirit of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for testing the permeability and consolidation rate of slurry, characterized in that: The following steps are involved: S1. Pour standard sand into a cylindrical test device with a radius of The porosity of the standard sand poured in is , with a weight of M, after adjusting the surface of the standard sand in the cylindrical test device to a horizontal level, measure the height H of the standard sand in the cylindrical test device; S2, take the volume The slurry is slowly poured into the cylindrical test device, and the slurry gradually penetrates into the gaps of the standard sand; S3. Place the cylindrical test device into a steel sleeve, so that the cylindrical test device fits against the inner wall of the steel sleeve. Use an airbag to block the opening of the cylindrical test device and apply pressure to the cylindrical test device through a pressurizing device. Pressurize the mixture of standard sand and slurry to p and hold the pressure for a time t, so that the slurry can fully penetrate the standard sand. S4. Remove the pressure device, measure the overall height h of the mixture of slurry and standard sand after complete penetration, and calculate the pressure permeability consolidation rate index ; The pressure permeability consolidation index The calculation formula is: ， It represents the apparent density of the whole formed by standard sand and slurry after penetration consolidation; It represents the maximum apparent density of the whole formed by standard sand and slurry after penetration consolidation; Indicates the volume The weight of the slurry; Indicates the shrinkage of the slurry at the end of the test; The size of is related to the applied pressure p; If the slurry solidification time is ≥30 minutes, the shrinkage rate =0; If the slurry setting and curing time is less than 30 minutes, the shrinkage rate shall be determined according to the slurry technical manual. The value of .

2. The method for testing the slurry permeability consolidation rate according to claim 1, wherein: Porosity of standard sand The calculation formula is: ， Indicates the bulk density of standard sand; Indicates the particle density of standard sand.

3. The method for testing the slurry permeability consolidation rate according to claim 1, wherein: The standard sand is sand that meets the ISO679:2009 standard.

4. A slurry permeability consolidation rate testing system, characterized in that: The method for testing the slurry permeability consolidation rate according to any one of claims 1 to 3 is adopted, and the testing system includes: A cylindrical test device, the cylindrical test device is used to carry standard sand and slurry, and the slurry will gradually penetrate into the pores of the standard sand; A pressurizing device is used to install the cylindrical test device into a steel sleeve, and then use an air bag to block the opening of the cylindrical test device. The pressurizing device is used to apply pressure to the cylindrical test device so that the slurry can fully penetrate into the standard sand; Calculation module for calculating pressure permeability consolidation index .

5. A computer device, characterized in that: include: processor; a memory for storing executable instructions; The processor is configured to read the executable instructions from the memory and execute the executable instructions to implement the slurry permeability consolidation rate testing method according to any one of claims 1 to 3.

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