Consolidation Analysis Of Transversely Isotropic Saturated Soil Under Cyclic Traffic Loadings

The problems of soil behavior under the time-dependent traffic loadings, is of greatimportance in Geotechnical Engineering. One-dimensional consolidation under cyclictraffic loadings has been examined previously by a number of researchers. However, amore realistic consideration would be the coupling between solid and fluid componentsin saturated soil in three-dimensional is regarded as more reasonable. Therefore, thispaper is based on Biot’s consolidation theory; a new model was established withconsideration of the cyclic vertical and horizontal forces caused by moving trafficloading in order to study the long-term settlement of the embankment and thedissipation of the pore water pressure in the soft soil foundation.Firstly, this paper gives the solutions of transversely isotropic consolidation theoryunder both vertical and tangential traffic loadings. Based on Biot’s theory fortransversely isotropic clay, the general solutions have been derived in advance byapplying the Laplace-Hankel Transform. By use of the Inverse Laplace-HankelTransform, pore water pressure and settlement are given at the end. The obtainednumerical results demonstrate that at the early stage of consolidation, the tangentialloading will have the non-negligible influence on the settlement. Moreover, the surfacesettlement under the time-dependent cyclic loading, which is used here to simulate thetraffic loadings, always lags behind the loading period.Secondly, through the application of ABAQUS (finite element analysis software),the transverse isotropic soil consolidation problems have been analyzed. We fit thesolution of ABAQUS to the results obtained by literature, and then we use the elasticmodel and the Cambridge respectively, to analyze. Contrasting pore pressure andsettlement of soil when the different kinds of drainage boundary conditions are presenttransverse isotropic and isotropic are not the same, under both vertical and tangentialtraffic loadings. Load is mainly in the form of vertical and tangential traffic loadings,the vertical load requires a constant load or multi-stage of form of loading. By the end, through the application of ABAQUS (finite element analysis software)to analyze the multilayer transverse isotropic soil consolidation problem, on the basis ofthe soil layer the model will be divided into four layers; then, analysis will be conductedusing the elastic model and Cambridge model, respectively. The main research, shall beinto a four layer soil contrast consolidation situation which exhibits tangential loadingand non-tangential loading to apply load to the soft soil under different soil parameters.And the settlement and pore pressure of four soil layers will be compared with the soil.Load is mainly in the form vertical and tangential traffic loadings, the vertical load forconstant load or multi-stage of loading form.