One-dimensional Nonlinear Consolidation Analysis of Soft Soil Considering Variable Load and Non-Darcy Seepage
To investigate the nonlinear consolidation behavior of soft soil under varying loads in one dimension,we introduce a novel one-dimensional nonlinear compression model to establish the one-dimensional nonlinear consoli-dation equation in consideration of non-Darcy flow for saturated soft soil subjected to variable loads.The equation is solved using the finite difference method.The excellent agreement between the obtained results and the analytical solution confirms the validity and reliability of the equation.Based on the solution of the consolidation equation,we thoroughly examine the effects of non-Darcy seepage parameters(represented by m and i1),the initial compressi-bility coefficient of the soil,the ratio of compression index to permeability index,as well as the rate and form of ex-ternal load,on soil consolidation.The results demonstrate that an increase in the non-Darcy parameters(m and i1)and the ratio of compression index to permeability index leads to a decrease in the consolidation rate of the soil.Mo-reover,a higher initial compression coefficient or larger loading rate results in a faster consolidation rate.In compar-ison with existing models,the established model in this study eliminates the need for measuring the initial effective stress of the soil.Consequently,it can be more easily applied to engineering.
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