Problems Of Consolidation And Wave Scattering In The Graded Saturated Soil

The consolidation and the elastic wave scattering of the graded saturated soil are the most important research topics in the field of hydraulic and hydroelectric and geotechnical engineering.The consolidation is widely utilized to calculated the settlement of founda-tion and the the loading limit of the foundation. The scattering of wave bears the impor-tant significance in the most engineering projects such as nondestructive evaluation and earthquake engineering. To complement the research of the consolidation and the wave scattering in the graded saturated soil, this dissertation gives a systematically study on the consolidation and the scattering on the basis of the boundary elements methods. The main work are made as followsIn the first chapter, the advance of the consolidation and the elastic wave scattering is reviewed in details. The conception and property of the saturated soil is given by analyzing the mechanical properties of the new materials. The necessity of the study on the consolidation of the graded saturated soil is explained according to an overview of a classic consolidation’s theory.The research methods of the elastic wave scattering are shown on the basis of reviewing the literature. It is illustrated that the boundary element method is the most effective means to solve the problem of consolidation and scattering by an overview of numerical methods.Finally, the main contents of the paper are given.In the second chapter, the basic equations to control the consolidation and wave scattering in the graded saturated soil is given by using some fundamental assumptions, penatration theory and elastic knowledge on basis of the porous media and Biot theory. In these equations, the parameters are varying with position coordinates in graded saturated soil compared with classic materials.One-dimensional consolidation problems of the graded saturated soil are solved in the third chapter. Firstly, the consolidation in the graded sphere sample subjected to con-stant loading all round the surface is studied by use of integral transform and numerical methods. Secondly, the consolidation in the graded layer subjected to the constant load-ing is studied by using separating variables and orthogonal functions in both free drained at top and bottom and drained at top and impermeable at bottom. Finally.the consolida-tion in the layer subjected to the varying loading is solved through the boundary element methods.The SH wave scattering by the defects in the orthotropic graded saturated soil in the f(?)rth chapter. Firstly, the scattering by a crack is solved by constant boundary elements (?) the boundary element methods. The displacements in both fields of the incident and The ideas and the empirical formulas to predict and calculate the foundation set-tlement are shown in the fifth chapter. The data fitting is executed by three kinds of serv(?) In sixth chapter, the main contents of the thesis are summarized and analyzed. The:ies work in the future is outlooked by analyzing the inadequacies of the disserta-The original work are male as follo.1、As on of the non-uniforms turated soil, the graded satura(?) soil’s conception xplained by combined with the functionally graded materials and saturated porous.-consolidation and elastic wave scattering in the graded saturated soil is studied.2、The Green function in the graded saturated soil is obtained by strictly Mathe-and analysis are executed by3、The relationship between the double-integral and curves-integral is explained by the most simple method.The derivation of the boundary integral equation is given by the Green’s formula.