In project it is thought that the soil with saturation over 80% is called saturated soil. But the saturation of the sample produced in the indoor experiment reached over 95 %. In fact the dynamic parameter of the latter attained through the test is different from that of the former. In this paper

the cyclic simple shear tests of the saturated soil of saturation 95 %

92 %

88 % and 83 % were carried out under the consolidation pressure of 50 kPa

100 kPa and 200 kPa respectively. Of four different sorts of soil sample under three different consolidation pressures

the maximum dynamic shear modulus Gdmax

the maximum damping ratio Dmax and the dynamic modulus ratio G/Gdmax-?

the damping ratio D/Dmax-? generalized curve were attained and analyzed comparatively. The results show that under the same consolidation pressure

the value of the Gdmax

Dmax

G/Gdmax shrink according to the growth of saturation; but the damping ratio D/Dmax

quite on the contrary

becomes larger with the raise of saturation

with the increasing of the consolidation pressure

the differences among the Gdmax

Dmax and G/Gdmax-? decrease gradually. Finally

this kind of phenomenon and its causes are discussed and analyzed.