Deformation Characterization of Remodeled Mixed Soils in Triaxial Photographic Test
MU Chunmei
YANG Jin
LI Yanxia
ZHANG Bo
Abstract：To investigate the full-process deformation characteristics of remolded mixed soils with different coarse-to-fine ratios,photogrammetry technology was employed to improve the conventional triaxial test.Three-dimensional models of remolded mixed soil samples of quartz sand-red clay at various deformation stages were constructed.The axial strain,radial strain,and stress-strain curves of the samples were obtained.The results reveal that the axial strain,radial strain,and deviatoric stress of mixed soils with different coarse-to-fine ratios increase with the rise in quartz sand mass fraction.Compared to the conventional triaxial tests,smaller axial strains and larger radial strains can be detected.Fluctuating growth in radial deformation is observed in the upper and lower regions of the mixed soil samples after the axial displacement reaches 8 mm.Conversely,a higher linear growth trend is noted in the middle region after the axial displacement reaches 4 mm.Deviatoric stress of remolded mixed soils with coarse-to-fine ratios of 3∶7,4∶6,and 5∶5 are found to stabilize at an axial strain of 6％.In contrast,strain-softening behavior is observed in soils with ratios of 6∶4,7∶3,and 8∶2.
Keywords：remodeled mixed soildeformation of soil sampledigital image processing technologytriaxial photographic test
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 62-68 )