Experimental Study on Induced Anisotropies of Remolded Loess in Cold Region

To improve the understanding of the influence of induced anisotropy on the strength and deformation characteristics of loess, a series of directional HCA tests under consolidated-drained condition were conducted. The test results indicated that the remolded loess showed a pronounced anisotropy in stress-strain relationship, strength, and deformation. The maximum difference in shear strength due to directional effect was 25% in the range of major principal stress orientation. Induced anisotropy has a great influence on the stress-strain relationship of soil, which is the essence of soil properties. In some engineering practices, the results of stress-strain analysis of soil have great influences. Approximately, isotropic remolded loess substantially eliminates its inherent anisotropy. The soil studied in this experiment is from the permafrost region of Qinghai. With the increase of engineering constructions, the geotechnical engineering problems here are becoming more and more significant. Therefore, this experiment will provide a good reference for the further study of soil anisotropy under complicated stress paths such as principal stress axis rotation.