SEM-based Three-dimensional Analysis and Fractal Dimension Calculation Method for Soil Microstructure
Fractal three-dimensional model has long been used to study soil microstructure.However,the acquisition of parameters necessary for calculating the fractal dimension through conventional geotechnical tests poses challen-ges,thereby limiting the utilization of fractal theory in soil research.To address this issue,a combined approach in-tegrating three-dimensional processing and triangular grid principle is proposed in this study based on the scanning electron microscope(SEM)testing of undisturbed soil samples collected from Dingbian,Shaanxi Province,and Lanzhou,Gansu Province.This approach enables the calculation of surface area and volume values corresponding to various measurement scales of soil particles(or pores),facilitating the determination of fractal dimensions.The ef-fectiveness and reliability of the proposed method are validated by applying fractal theory to analyzing soil-water characteristics.Moreover,the three-dimensional processing technique allows for the determination of other soil mi-crostructure parameters,such as apparent porosity and specific surface area.Consequently,it can be regarded as a novel method for quantitatively investigating soil microstructure.
scanning electron microscope(SEM)microstructurethree-dimensional analysisfractal dimension
万方数据
维普
