Finite Element Analyze Of Foundation Of Two Dimension Biot Consolidation Based On Exponential Seepage Model

It is found that not all of the seepage is consistent with Darcy's law in the study of the seepage of pore water in saturated soft clay,the later laboratory experiments and field measurements have also proved the discovery.however,the study of the consolidation of soft clay is mostly based on Darcy's law to describe the seepage in soil,And the settlement value calculated by the consolidation theory based on Darcy's law is often inconsistent with the measured results.Considering that the occurrence of this phenomenon may be caused by non-Darcy seepage,In this paper,the exponential seepage of non-Darcy is introduced into the continuity equation of Biot consolidation theory,then deduce the consolidation control equation as the form of finite element and perform numerical calculations,then analysis and study the results,finally obtain he effect of non-Darcy percolation parameters on the consolidation behavior of saturated soft clay homogeneous soils,the main results are as follows:(1)Obtain the Biot consolidation finite element equation considering the exponential seepage model is deduced according to the principle of weighted residual method,as can be seen from the equation that the influence of hydraulic gradient is considered,and this is more consistent with the actual consolidation of saturated soft clay;(2)Obtain the law of the influence of seepage parameters on the average consolidation degree and pore pressure of single layered homogeneous soil,through comparative analysis the two-dimensional Biot's consolidation behavior of single-layer foundation with exponential seepage model and Darcy model;(3)Taking homogeneous soils with the same soil parameter and different seepage parameters as an example,obtain the variation law of the average consolidation degree with the external load and soil thickness when the seepage parameter values are different through comparative analysis the two-dimensional Biot's consolidation behavior of single-layer foundation with exponential seepage model and Darcy model;(4)Obtain the influence of seepage parameters of different soil layers on the consolidation behavior and settlement through comparative analysis the two-dimensional Biot 's consolidation behavior of single-layer foundation with exponential seepage model and Darcy model.