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- Title
FEATURES OF THE MORPHOLOGY OF THE SHEAR FAILURE SURFACES OF COARSE-GRAINED SLIP ZONE SOILS.
- Authors
Zechuang Li; Qiyuan Cai; Di Liu
- Abstract
Analyzing the change in the roughness of the shear failure surface under different particle composition is important to reveal the mesoscopic mechanism of strength change of coarse-grained slip zone soil. Slip zone soils were grouped according to different particle gradations and coarse particle contents for experiments. To collect shear surface coordinate data points, the customized shear surface measurement mold was examined to measure the shear surface. Then, the measured 3D elevation data are drawn into a 3D surface map by using the Surfer software to show the actual situation of the shear surface. The shear surfaces were analyzed by using box plots and ice crystal flower plots. Finally, the roughness of the shear surface was quantified by the root mean square of the relative undulation (Z2). Findings indicate that the shear surface undulation characteristics of coarse-grained slip zone soil are obviously correlated with the proportion of particles with a size between 5--20 mm. Moreover, whether the gradation is good or poor has a significant effect on the shear surface characteristics. The well-graded shear surface is rougher and more undulated, whereas the poorly graded shear surface is the opposite. As the normal pressure increases, the roughness of the shear surface decrease. As the content of coarse particles increases, the roughness of the shear surface increases, and Z2 has a highly positive linear correlation with the coarse particle content.
- Subjects
SURFACE roughness; ROOT-mean-squares; ICE crystals
- Publication
Civil Engineering Journal, 2022, Vol 31, Issue 2, p302
- ISSN
1805-2576
- Publication type
Article
- DOI
10.14311/CEJ.2022.02.0023