In order to study the dynamic characteristics of sands in Xiamen city
a series of dynamic triaxial tests were conducted for the medium-coarse sand and the thin-fine sand at Jinqiuhaoyuan site
and 4 resonant column tests were performed for the medium sand with slurry inclusion. According to the research results
the liquefaction curve and the constitutive relationship for the medium-coarse sand and the thin-fine sand were established; and a model of pore water pressure for the two kinds of sands was proposed. The change regularities of dynamic shear modulus and damping ratio for the medium sand with slurry inclusion were obtained.