Abstract
ABSTRACT The dams which were damaged during the Tokachioki earthquake of 1968 are small earth dams of volcanic sandy loam founded on soft sandy loam of an average thickness of 3 m. These dams were constructed before around 1920 according to the technical standards of those days. On the basis of investigations of 93 damaged dams, the damage features are classified into the following five types, and discussed from the viewpoint of earth dam design: (a) Sliding resulting in complete failure of dam (b) Sliding of upstream slope (c) Sliding of downstream slope (d) Cracking in the dam body (e) Damage to appurtenant structures
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