SEISMIC SLOPE STEBILITY ANALYSIS OF JOINTED ROCK MASSES ON THE NORTHERN ABUTMENT OF GOTVAND DAM, IRAN

摘要

Gotvand Dam is one of the largest rockfill dams in Iran that is now under construction that the height is 178m.There is a dislocated rock mass formed of conglomerate in the right abutment of the dam which has several sets of joints and it seems to have a considerable potential of instability. A discontinuum modeling approach is to be more appropriate to analyze the problem of a rock slope with multiple joint sets which could control the mechanism of failure. In this study, the distinct element UDEC code has been used to analyze the stability of the rock mass subjected to dynamic earthquake loading. It is expected that the slope will be stable after earthquake shaking,despite of considerable sliding movements of rock layers which may take place during strong ground motion.