| The shipping conditions and transport capacity of Yangtze River's middle reaches have improved due to the construction of Three Gorges Project, and also , hydrological and geological conditions of reservoir have changed. The reservoir water level rising make the inundated parts of river slop increased, the maxis change range of reservoir water level will be 30m, this condition will make a extremely negative impact on the stability of slop in reservoir. There are no results about slope stability study under huge level fluctuation in abroad, because of lack of such hydrological conditions. Many domestic scholars have done a lot of analysis about stability of mountain river slop and impact on wharf with the actual situation of reservoir. But the study of this question have no get any results applied to engineering practice, even there are much blank, as the complexity of question, imperfect theory and restrictions on the means of research.The slop of mountain river reservoir is a mixture included modified block by complicated geological conditions and tectonic structures (Faults, fissures and joints), with the specific characteristics of the structure and mechanics, placed in certain geological environment (initial stress, groundwater, the temperature). Usually, the slop exist as saturated or unsaturated condition, include solid, liquid and gas, is a typical porous media. The pore structure component of soil particles make variable-skeleton,its kinematic characteristics of deformation. Fluid is divided into two parts: water placed in rock gaps characterized by hydrostatic pressure, water exist in large mutual connecti-veity cracks to flow characteristics. Therefore, the actual slope stability problems are typical of fluid-structure interaction problems.But the existing research methods, mostly to deal with the problem can be simplified, for example, water simplified into hydrostatic pressure and solid-phase framework for the uniform distribution gap, make there a great differences between results and actual condition. Most of the research of wharf and slop interaction make the factors of structure as main areas(load, vehicle load and ship loading), but neglected the inflation of foundation (slop) stability changes to wharf. There are many limited in theory and practice of guidance of the method, especially under the conditions of complex reservoir mountain rivers and the slope stability analysis on the structure of terminal, traditional method can no longer meet the requirements. In this dissertation, based on research findings at home and abroad on study dynamic of slope stability of the reservoir and the achieved analysis results of porous media fluid-coupling, using methods of theoretical analysis and numerical simulation, the mountain rivers large reservoirs slope stability and structure of terminal were studied. The main work and conclusions in this dissertation are as follows:(1) The research history and analysis method on the Reservoir rock slope stability analysis were reviewed. The main contents and analysis method on stability analysis of rock slop were clarified. Base on stability characteristics of rock slop, with the status Fluid-structure interaction problems, a calculation method of Fluid-structure theory application in reservoir rock slope stability analysis was advanced. At the same time, the study course of slop and wharf structure interaction was reviewed, and also, the characteristics of stability analysis was also reached. Base on this, research method of this question was advanced.(2) The basic theory of Fluid-structure interaction was analysis, with structure characteristics of rock slop and mixed media theory, mathematical model of mixed media interaction analysis was advanced. Analysis methods of rock slop were aggregate, the limit equilibrium analysis method and Finite Element strength reduction method were focused. The characteristics and scope of the two methods were clarified, and rock slope stability analysis model was advanced.(3) Rock slope stability factors and the relationship between the slope stability was comparative analysis with the mature slope stability analysis method—limit equilibrium analysis by analysis software LiZheng. By calculation, vrious factors affecting the process of change in the slope safety factor curve were obtained, its engineering was educed, proved the results were right. And also, the comparative basis for next test was provided.(4) Connected with a natural science project of Chongqing—"Study on the interaction between high pile wharf and slop under complicated condition" and a construction of bulky transport wharf project, using large-scale finite element method software, the stability of high rock slop under different water level variation of the project was analysis. Though test, the relations between water level variation and stability of slop was obtained, therefore, the references for slop reinforcement and impact analysis of wharf were provided.(5) Based on numerical analysis of the stability of slop, the inflation on the wharf by stability of slop variation was analysis. With finite element software—PLAXIS, the changes in the law of wharf structure due to variation of slop stability was obtained, forcing of wharf was neglected during calculation.(6) With the results of slope stability changes and impact on the pier structure, slop reinforcement program was advanced, and also, the terminal system of wharf and slop interaction was analysis after reinforcement, the result was compacted with before. Finally, more reasonable reinforcement program were advanced. |
