Comparison And Verification Of Computational Model Of Deformation In High Core-Wall Rockfill Dam

The core-wall rockfill dam has many virtues, such as using local materials, better adaptability to the foundation deformation, making a agile selection in construction methods, simple structure, and so on. It is the most popular kind of dam in the world. Especially in China, the core-wall rockfill dam developed quickly. A large number of high dams came forth in the past twenty years. At the same time there are many technologic problems to solve. One of the most important problems is how to forecast and control the deformation of the high core-wall rockfill dam.After 1960s, the nonlinear finite element method developed quickly, and it is very useful to calculate the deformation of the earth and rockfill dam. So many people began to research the computational model of soil deformation, including constitutive model, wetting model and rheological model. These models were used in practical projects, and so many problems were solved. But the verifications of these models are not enough up to the present. So it is difficulty to choose the right model in practical projects and it is very important to compare and verify these models.After a comprehensive literature review, two kinds of constitutive models i.e. Duncan and Zhang's EB Model, Shen's double yield surfaces Model and improved Shen's wetting Model and Shen's rheological Model were chosen as my studing objects. Combining with the prototype observation data of Xiaolangdi dam which is the highest core-wall rockfill dam, I comprared these models systematically with theoretical analysis, experimental verification and calculating results of engineering examples.