Abstract
To investigate the mechanism of long-term settlement of rock-fill dam, an analytical study on the behaviour of impervious zone of a center-core type rock fill dam have been done. Factors affecting the long-term settlement were divided into five, consolidation settlement before reservoiring, secondary consolidation, settlement by reservoiring load, collapse settlement by reservoiring, settlement accompanying the draw down of water level. Next, quantitative study using finite element method, settlement prediction by past laboratory test results, and multiple-regression method was examined. Estimated and measured settlement showed comparatively good agreement, and the validity of supposed mechanism of long-term settlement was confirmed.
