INFLUENCE FACTORS ON THE SHEAR MODULUS AND DAMPING OF RECLAIMED SOIL

In this study, the filled soil in Yun-Lin offshore area was adopted as testing samples. A successful hydraulic sand fill simulation method is developed in the laboratory to investigate packing properties of soil aggregates. The influence factors such as fines content, different sample preparation methods, different relative densities and confining pressures are taken into consideration. A series of resonant column tests have been performed to study the shear modulus (G) and damping ratio (D) of the filled soil. The influence of effective confining pressure was discussed by using the K2 value. In order to evaluate the influence of fines content on maximum shear modulus of the filled soil, a fines content influence parameter B is defined. With this parameter and on the basis of the evaluation method, the influence of fines contents, effective confining pressure, void ratios, and shear strain amplitudes on the maximum shear modulus of filled soil are discussed. The predicted results were shown to agree with the experimental results. The newly proposed evaluation method can be used to predict the maximum shear modulus of hydraulic filled soil.