Rockfill Dam Stress Deformation Characteristics Of Study

Concrete faced rockfilll dam (CFRD) is the most competitive dam type that with great potential in dam engineering. In the early stage of the CFRD development, the design was mainly based on engineer's experience. Lesser systematic research works were carried out. In recent years, with the progress of CFRD technology, the design and construction of CFRD is gradually shift from the experience based method to the more scientific based method which is mainly guided by theoretic analysis and laboratory test.Fro concrete faced rockfill dam, the stress and deformation properties of the dam are the most important issues that vital to dam safety and operation. Although great progresses have been achieved in China's CFRD construction, there are also several failure cases. The breach of the Gouhou CFRD, the concrete slab collapse of the Zhushuqiao CFRD and the structure cracks in slabs of the Tianshengqiao No 1 CFRD remind us to pay much more attentions on the stress and deformation properties of CFRD. With the rising dam height of CFRD and more and more complex topographic and geologic conditions at dam site, the requirements for analysis method will be higher and higher. For high CFRD, how to predict its deformation trends, how to optimize dam design and to keep a smooth stress status of concrete slabs have become the key issues of the design. Though there are certain achievements in past research, it still lack of comprehensive and systematic study on the stress and deformation properties of CFRD. The research on this aspect will not only has important academic significance, but also has great practical values in engineering application.Focuses on stress and deformation properties of CFRD, the dissertation conduct a systematic research in this field. Stress and deformation status of CFRD under different conditions were calculated and the related influential factors were analyzed. In the research, besides the numerical analysis method, centrifuge modeling test was applied as well. Based on this research, a method of combining numerical analysis and physical modeling test to perform stress and deformation analysis was further developed.The substantial progresses and the main innovation works of the dissertation include:(1) Based on systematic summarization of the engineering properties of rockfill material, the related influential factors and constitutive models were investigated.