Relationship between Water Content and K-G Model Parameters of Unsaturated Clay

Taking the unsaturated clay in a certain iron mine dump site in Liaoning province of China as the object of study, a number of unsaturated clay consolidated-drained triaxle compression tests under different water contents is carried out. The results show that, the water content has a great influence on the strength and volumetric strain of the clay, the higher the initial water content, the lower the strength and the larger the volumetric strain. According to the experimental data, the parameters of K-G model such as K, n, R-f, c, phi, alpha(k) and K-i are obtained with different initial water content by numerical calculation. With the water content increasing, the value of K, R-f, c, phi, alpha(k) and K-i were decreased, while the value of n was increased. The function analogues of the experimental results indicate that each K-G model parameter and water content has a logarithm function relation.