Analysis of crack characteristics of expansive soil based on multi-threshold segmentation algorithm

In order to understand the characteristics of expansive soil microstructure,according to the physical principle of CT scanning technology,a multi threshold geometric segmentation algorithm was established,and it was used to divide the soil composition and reconstruct the three-dimensional microstruc...

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Bibliographic Details
Published inHenan Ligong Daxue Xuebao. Ziran Kexue Ban = Journal of Henan Polytechnic University. Natural Science Vol. 42; no. 1; p. 194
Main Authors Jian, Aosong, Xu, Guoyuan
Format Journal Article
LanguageChinese
Published Jiaozuo Henan Polytechnic University 01.01.2023
Subjects
Algorithms
Computed tomography
Cracks
Expansive soils
Ferromanganese
Image segmentation
Loess
Microstructure
Nodules
Nonuniformity
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Summary:In order to understand the characteristics of expansive soil microstructure,according to the physical principle of CT scanning technology,a multi threshold geometric segmentation algorithm was established,and it was used to divide the soil composition and reconstruct the three-dimensional microstructure of the cracks in expansive soil. It could be seen from the test results that the multi-threshold segmentation algorithm could clearly identify the different components in CT images. The intact expansive soil could be divided into four components:Cracks,potential cracks,soil matrix,and loess-doll or ferromanganese nodules.The cracks in the expansive soil were mainly distributed in tubulars and sheets and its distribution had obvious non-uniformity. The gray value or density of the potential cracks was between the cracks and the soil matrix. The potential cracks were distributed in an irregular network and almost taking up the entire soil space,with a high volume content.
ISSN:1673-9787
DOI:10.16186/j.cnki.1673-9787.2021010009