Deformation behavior of concrete face slab having its lower part deeply seated on bedrock |
---|
학술지명 China WaterPower Press
저자 이완호,조성은,임은상,신동훈,박한규
발표일 2009-12-31
|
In designing a CFRD, watertightness, durability and crack control of concrete face slab are the primary concerns for its proper performance during construction, impounding or operation. While it is considered that deformation of concrete face slab depends on the geometry and dimension of foundation rock near plinth, and the stiffness between bedrock and dam body, no evidence of the dependency of deformation on them has been given so far. In this study, large triaxial tests were conducted to determine the strength and deformation properties of gravel and rock fill materials to be used as main fill zones of the dam. Physical modelling(centrifuge test) and numerical analysis were performed to investigate the effects of geometrical conditions, and difference of stiffness between fill materials and bedrock on deformation behavior of the slab. From the results of centrifuge tests and finite element analysis for model CFGD dam, as expected, it was known that during full reservoir, excessive tensile stresses within the slab are mobilized near the shoulder of additionally-excavated slope for plinth, where the foundation rock level intersects the excavation slope |