Experimental Study on the Mechanical Behavior and Destructured Process of Artificially Structured Soils in Triaxial Compression

摘要

The study of natural or cemented soils is of significant interest to geotechnical engineers. This paper presents a study on the stress-strain-strength behavior and the destructured process of artificially cemented soils under different loading conditions. The cemented soils are produced by mixing the silty clay, kaolin and silicate cement and salt grains with different contents so that the bonding strength and big pore fabric can be formed. Isotropically consolidated drained triaxial tests and consolidated undrained triaxial tests under different stress paths were conducted on the artificial cemented soils to investigate the deformation and strength behavior and the destructured processes. The test results show that the shear strength envelope of structured soils is nonlinear, which can not be predicted by linear Mohr-Coulomb criterion and the shear strength varies with the change of consolidated pressures.