ON THE BEHAVIOUR OF LONG-TERM SETTLEMENT OF IMPERVIOUS ZONE IN ROCK-FILL DAM

Abstract

To investigate the mechanism of long-term settlement of rock-fill dam, the field observations of impervious zone of a center-core type rock-fill dam were carried out. As a result of observation, the long-term settlement, occurred by some factors, is found distributed ununiformly in the core zone related to the scattering properties of fill materials, and is also increased when the water level draws down significantly. By these results, five factors which cause the long-term settlement were clarified.