The numerical analysis for the interaction of concrete core and rockfill shell of a dam and the prototype measurement and verification

This paper presents a rockfilled dam with a concrete core of fifty eight meter height serving as upstream cofferdam of Longyang Xia Reservoir. The rockfilled dam began to prevent water in summer of 1980, since then it had worked normally for seven years. It stood a severe test of extreme flood in 1981. The systematical monitoring was performed in the flood and dry period. After that the FEM was used in back analysis for studying the interaction between concrete core and rockfilled shell and comparing with the measuring result. This paper concluded the experience of adopting the concrete core in rockfilled dam according to the FEM analysis and proto-type monitoring.