A Study On One Dimensional Consolidation Of Gibson Soils

On the basis of the work so far available,this paper makes a further study of one-dimensional consolidation problem of Gibson soils.Firstly,by the method of Laplace transform,one dimensional consolidation of one-layer Gibson soils under time-depend loading is studied and the analytical solutions in frequency domain are obtained. On the basis of the solutions obtained and the computation through programming,the influence of some parameters and loading conditions on the consolidation behavior under trapezoidal,triangular and rectangular cyclic loading,is investigated.Secondly,one-dimensional consolidation of one-layered Gibson soils with semi-pervious boundaries is studied in this paper,and according to numerical examples,some characters of consolidation such as the effective stress and settlement in the soils under arbitrary loading are found.Finally,by the method of Laplace transform and matrix transform,one-dimensional consolidation of layered Gibson soils under arbitrary loading is studies and the analytic solution in frequency domain are obtained. On the basis of this research,the one-dimensional consolidation of layered Gibson soils with semi-pervious boundaries is investigated in this paper. According the numerical examples,the characters of one-dimensional consolidation of multi-layered Gibson soils are found.It has been shown that the consolidation of Gibson soils differ with Terzaghi's theory. And under cyclic loading,the effective stress in soil is not synchronously changed with loading but is developed in a delayed way. The farther from drainage surface the soil mass,the more significant the phenomenon of the delay.