LONG TIME EFFECT OF EARTH DAM ACCOUNTING FOR THE DEGRADATION OF PHYSICAL AND MECHANICAL PROPERTIES OF EARTH MATERIALS

摘要

Although earth dam is widely used in dam engineering, the evaluation method for its long effect at present is immature. In this paper, the physical and mechanical properties of the original dam materials in Yunleng reservoir were compared with those of the materials bored after 20-year-operation.As a result,an evaluation model of long time effect was proposed,and the evaluation method is established.