The construction interfaces of RCCD have a distinctive influence on the deformation of dams. Based on the theory of damage mechanics, the characters and rules on deformation of construction interfaces were studied and the analytic model of anisotropic creep damage of construction interfaces was built as well. These models can reflect the elastic deformation, the attenuation creep deformation, the irreversible creep deformation and the accelerating creep deformation of interfaces. The example

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... ws that the results of the proposed model can tally with that of monitoring in situ preferably, and verifies the validity of the model. The methods proposed and the analytic models can be generalized and applied to general concrete dams, especially to the analysis on deformation rules of fault and interlayer in dam base.