Using triaxial rheological apparatus, a series of tests on triaxial stress relaxation properties of Nanning expansive soil under different constant strain were carried out by step loading.The change laws of stress relaxation characteristics and relaxation modulus of the expansive soil under different constant strain levels were discussed.Moreover, according to the features of isochronous stress-strain curves, the stress relaxation characteristics of the expansive soil were studied under triaxial compression.Based on the analysis of the experimental results, an empirical model was established t...
