It is an important topic to predict the settlement

especially post construction settlement

of high fill foundations

which is encountered more and more often in the mountainous areas in western China. However

both the calculation model and calculation method are to be studied further. The characteristics

application scope and parameter values of the hyperbolic model are discussed first; and then the creep mechanism of rockfills is also discussed in depth

especially the reason that creep under laboratory test conditions always finishes in a shorter period than that under filled conditions is explained. After that

a simplified calculation method is proposed to calculate the creep deformation for high fill foundation with uniform thickness in a large area

in which load variations during creep can be properly considered. The rationality and feasibility of the proposed method is demonstrated through numerical comparisons. Besides

by analyzing the results of laboratory tests

the significant relationship between dry-wet cycle deformation and cycle numbers is found

on the basis of which a simplified coupling calculation method that can simultaneously compute the creep deformation and dry-wet cycle deformation is also proposed. Finally

the post construction settlement of a practical engineering project is predicted by the proposed method.