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Calculation method of three-dimensional porosity of soil

A three-dimensional pore and calculation method technology, which is applied in the fields of permeability/surface area analysis, suspension and porous material analysis, instruments, etc., can solve problems such as low accuracy and complicated operation, and achieve high accuracy of measurement results and simple measurement process , the effect of improving the calculation efficiency

Active Publication Date: 2020-09-25
SHIJIAZHUANG TIEDAO UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the three-dimensional porosity of soil, so as to solve the technical problem of complicated operation and low precision of the microscopic observation method of soil pores in the prior art

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  • Calculation method of three-dimensional porosity of soil
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  • Calculation method of three-dimensional porosity of soil

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specific Embodiment approach

[0090] Further, as a specific implementation of the soil three-dimensional porosity calculation method provided by the present invention, the preparation of soil samples includes:

[0091] Prepare and obtain original soil samples according to preset soil porosity and compaction;

[0092] Cut the original soil sample to obtain multiple semi-soil samples with cross-sections;

[0093] The floating particles on the section of semi-finished soil samples were removed separately to obtain multiple finished soil samples.

[0094] A soil sample is usually truncated into two sections, and then two sections are obtained. During the test, the average value of the scanning data on the two sections is taken as the scanning calculation porosity of the local sample, which can basically avoid damage to the original soil during the truncation process. The test error caused by the inhomogeneity caused by the sample surface.

[0095] Further, as a specific implementation of the method for calcu...

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Abstract

The invention provides a method for calculating the three-dimensional porosity of soil, which belongs to the field of indoor soil porosity testing, including preparing soil samples; obtaining images of soil sample sections by scanning electron microscopy; The binarization threshold in the threshold sequence performs binarization processing on the image respectively, and obtains the gray area in the image after binarization processing; fits the gray level according to the binarization threshold and the gray area corresponding to the binarization threshold The curve of the area changing with the binarization threshold; integrate the curve equation of the gray area changing with the binarization threshold to obtain the pore volume of the soil surface microstructure in the image; obtain the overall volume of the soil surface particles and pores in the image; Calculate the porosity. The error of the method for calculating the three-dimensional porosity of the soil provided by the invention can be limited within a reasonable error range, the accuracy of the measurement result is high, and the measurement process is simple, which is conducive to improving the measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of indoor soil porosity testing, and more specifically relates to a method for calculating the three-dimensional porosity of soil. Background technique [0002] Soil is a multiphase medium with complex structural features such as pores, soil skeleton, soil particles, and moisture. In terms of explaining the macroscopic properties of soil, it is a scientific and effective means to study the macroscopic properties of soil from the microscopic structure of soil. The size and distribution of soil pores are one of the main reasons for soil deformation. For example, foundation settlement and slope instability are all related to the change of soil pore structure or the interaction between pores and water and other media. Therefore, observing soil The pore distribution characteristics of the body are particularly important. [0003] At present, the research on the change of soil porosity is mostly carried out thro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/088G01N2015/0846
Inventor 冯怀平马德良常建梅张伏光林延杰刘启塬
Owner SHIJIAZHUANG TIEDAO UNIV
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