| Although the stress history of soil has great influence on its compressibility and consolidation behavior, the one-dimensional consolidation theory of Terzaghi's so far widely used cannot take consideration of the effect of stress history. In this thesis, one-dimensional consolidation theory of saturated soil considering the effect of stress history is studied in detail.Firstly, based on semi-analytical method, the computer code ODLCAOS for linear consolidation of saturated soil and ODNCAOS for nonlinear consolidation of saturated soil are developed by Fortran programming considering the effect of stress history of soil.Secondly, to verify the reasonability of the two codes, a comparison is made between the semi-analytical solution of linear consolidation when ae = av and Terzaghi's theory, and the other is made between the semi-analytical solution of nonlinear consolidation when ce = cc = ck and the available analytical one.Finally, by using the two computer codes, a great amount of computation is made through typical numerical examples, and the behavior of one-dimensional linear consolidation and the one of nonlinear consolidation with effect of stress history of soil are illustrated.It has been shown that once the effect of stress history is taken into account, the consolidation behavior of soil differs greatly from that described by Terzaghi's theory, no matter what kind of model is adopted for soil in a consolidation analysis, linear or nonlinear. The magnitude of load, the pre-consolidation pressure of soil, as well as the variations of compressibility and permeability of soil, all has significant influence on the consolidation behavior. |
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