Pore character statistics method of microscopic pore model on basis of improved maximum ball method

Abstract

The invention discloses a pore character statistics method of a microscopic pore model on the basis of an improved maximum ball method, and belongs to the technical field of geotechnical engineering.The method comprises the following steps that S01, a particle accumulation module is built, and accumulated particle information is output; S02, a pore space of the particle accumulation module is filled with voxel particles; S03, the improved maximum ball method is adopted, a pore of the pore space is reasonably divided; S04, pore characters are counted, wherein the pore characters comprise the pore size, the throat radius and the pore coordination number; S05, pore visualization is conducted, and the pore structure model is generated. According to the pore character statistics method of themicroscopic pore model on the basis of the improved maximum ball method, compared with a test method, numerical simulation has the advantages of being high in repeatability, unlimited to instrument size, low in cost and capable of comprehensively counting various pore characters.

Description

Technical field [0001] The invention relates to a statistical method for pore characteristics of a microscopic pore model based on an improved maximum sphere method, in particular to a statistical method for pore characteristics of a PFC3D particle accumulation model based on an improved maximum sphere method, belonging to the technical field of geotechnical engineering. Background technique [0002] The microstructure characteristics of soil determine its macro-engineering properties. Understanding and understanding the internal structural characteristics of soil from a microscopic point of view is of great significance for understanding and analyzing the macro-engineering properties and behavior characteristics of soil from the mechanism. Rock and soil are natural porous loose materials, which contain a large number of irregular pores. The size and distribution of these pores have a direct impact on the permeability, water holding characteristics, deformation and strength chara...

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Problems solved by technology

This method requires great care in sample preparation, try to avoid the disturbance of the sample, pay attention to the integrity of the slice surface and the distance between two adjacent slices should not be too large to avoid spatial discontinuity, so the time cost of this test method Higher, and higher requirements for sample preparation operations

CT scanning is a non-destructive imaging technology, which can obtain images of the microscopic pore structure of the soil, transmit the images to the computer, set a certain threshold through the image processing software, convert the image into a binary image, and obtain the number of pores, Size, shape, position and other information, this method will not destroy the pore structure and skeleton of the sample, and can easily obtain micron-scale non-destructive pore structure, but the test equipment is expensive and the higher the resolution requirement, the higher the instrument cost

However, image scanning is greatly affected by sample preparation quality and test equipment, and the scanned image is limited by image processing technology, and the test cost is too high

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