A method for identifying a structure weakening area of residual soil based on CT images

Abstract

The present application relates to the field of geotechnical engineering and computer image processing technology, and particularly relates to a residual soil structure weakening area identification method based on CT images. The method comprises the following steps: constructing a distance field map for the residual soil CT image; segmenting independent particle objects based on the distance field map, and establishing a particle instance index map; identifying a contact connection area based on the particle instance index map; extracting the effective neck width of the contact connection area according to the distance field map, and correlatively calculating the equivalent geometric diameters of the particle objects on both sides of the contact connection area to construct a contact feature data set; and calculating the area contact bottleneck coefficient of the contact connection area based on the contact feature data set. The present application quantifies the geometric bottleneck features of the particle connection and analyzes the local topological stability, realizes the quantitative identification and spatial visual positioning of the weak areas in the internal structure of the residual soil, and effectively identifies the particle connection structure which is geometrically connected but mechanically unstable.

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