| In order to investigate the creep properties of compacted clay of high-filled embankment, one-dimensional consolidation creep tests were carried out with three different compaction degrees of 90%, 93% and 96% under five different kinds of vertical loads of 100, 200, 400, 600, 800 kPa, respectively. The results show that: 1) The creep deformation of compacted clay presents obvious nonlinearly characteristic. 2)Creep deformation decreases with the increase of effective stress. 3)The sensitivity of creep deformation decreases with the increase of soil compaction. When the data of experimental results is fitted by similar Kelvin Voigt rheological model based on fractional calculus, the parameters of this model are obtained. The relationship between fractional order β and compaction degree K, elastic modulus E0 of ［H］ element and compaction degree K, as well as elastic modulus E1 of ［FC］ element and compaction degree K were analyzed, respectively. The results show that the fractional order β decreases with the increase of compaction degree of clay, but both of the elastic modules E0 and E1 increase. Prediction results are in good agreement with experimental data，and this prove that the parameters of the proposed model based on fractional calculus describe the flow ability of compacted clay reasonably. |
