Study On Coupling Of Seepage Field And Stress Field Of Soil

The unsaturated seepage problem and the interaction and coupling between seepage field and stress field are the importance study contents in geo-technical engineering. Many engineering problems are related with unsaturated seepage Considering the theory problem and engineering appliance, it is very significant for us to make a systematic study. Seepage field and stress field of rock and soil medium are interactive,. The interaction between seepage field and stress field of rock and soil medium embody the coupling relation between two fields. Considering two fields as a system, it is essential to study and discuss the coupling problem between seepage field and stress field.Being based on summarizing the predecessor's research results, this thesis mostly covers the Finite-Element Modeling of the saturated-unsaturated seepage, the interaction and coupling between seepage field and stress field.; programming for the finite element method of saturated-unsaturated seepage and coupling between seepage field and stress field.:1 .This thesis first expatiate upon soil moisture potential theory, then study and discuss the basic unsaturated seepage theory, the relation of soil-water's characteristic curve and seepage coefficient..2. Proceeding from basic seepage theory, the thesis deduces the 3D saturated-unsaturated seepage differential equation of porous media and the finite element equation regarding pressure water head and total head as basic unknown quantities. In the finite element method of the saturated-unsaturated seepage field, both the seepage in the saturated region and the effect in the unsaturated area are considered, unifying saturated-unsaturated seepage field and applying uniform derivative governing equations in the wholly seepage field... 3. Applying the saturated-unsaturated the finite element method program that are written by the Finite Element Program Generator to calculate one earth dam example, the change of the pressure head and the driving process of free surface in the dam when water level rises are discussed., meanwhile, the thesis validates the program by using business software seep/w ,the results show that the program is rational..4. Based on the Darcy law and conservation of mass, the thesis deduces differential and...