Numerical Simulation Study On The Consolidation Of High Fill Saturated Foundation With Dynamic Compaction Method

As an economical and effective method in the consolidation of soil, dynamic compaction is been applied more and more effectively in capital construction. The range of application which comes down to the saturated soil by thick fill with dynamic compaction method is larger and larger. By now, there have been many successful practices and experiences in consolidation of saturated soil by thick fill with dynamic compaction method, but the theory study lag the engineering practices at all times. So, at present, the designs of dynamic compaction are depended in the experiences and experimentation to a great degree.In order to promote the development of theory and application study on dynamic compaction deeply, based on synthetical analysis of relevant information of consolidating the saturated foundation with dynamic compation method, considering the powerful bond action between liquid and solid, nonlinear character of material and geometry in consolidation of saturated soil, and using porous media model based on theory of mixtures, dynamic balance equation on finite element method is educed. In this paper, the dynamic load is change into triangular load, the programmed of elastoplastic dynamic analyze is compiled by the writer to calculate soil's displacement, stress, pore water pressure and velocity of water at every time of day. These data is disposed to photo and flash by software of Tecplot and Excel to analyses the complicated microcosmic dynamo movement and macroscopically transfiguration characteristic of the foundation soil under the dynamic compaction. The probability of applying the numerical simulation method to make certain the construction parameter is also discussed deeply in this paper. Such as: make certain the optimal rammer times according to the varying curve of the increament of pore water pressure along with the rammer times; make certain the effective consoliation depth according to soil's vertical deformation along with depth; make certain the consolidation range of dynamic compation according to soil's vertical deformation along with horizontal direction.