The purpose of this study is to establish a modified Yin's double-yield-surface model based on the ratio of bioenzyme-based soil stabiliser, which can accurately describe the physical and mechanical properties of the bioenzyme-treated expansive soil. A series of drained triaxial shear tests was carried out to study the evolution laws of stress-strain, the elastic deformation, yield surface shape, dilatant yield surface, and failure line equation relating to the content of bioenzyme. Moreover, the effect of the bioenzyme content on the parameter...
