PERFORMANCE OF EARTH DAMS DURING EARTHQUAKES

摘要: Particular emphasis is given to dam performance in six major earthquakes—San Francisco (1906); Ojika, Japan (1939); Fallon, Nevada (1954); Kern County, California (1952); Tokachi-Oki, (1967); and San Fernando, (1971). An attempt made determine relationships between embankment characteristics observed performance. It concluded that (1)Hydraulic fill dams on stable foundations can safely withstand accelerations up about 0.2g from Magnitude 6.5 earthquakes; (2)virtually any well-built moderately strong shaking or more with no detrimental effects; (3)dams built of clay soils seem be able extremely large magnitude earthquakes without significant damage; (4)dams may fail 24 hrs after being shaken by an earthquake probably due cracking leading piping erosion; (5)primary concern should constructed saturated sandy sand foundation materials. Prototype cited as a basis for these conclusions.