Abstract
Detailed soil investigations were conducted by means of the standard penetration test and Dutch cone penetration test, together with sampling by means of the large diameter sampler and Osterberg type piston sampler at two sites in the city of Niigata, Japan ; one where liquefaction type failure had occurred, and the other where liquefaction type failure had not occurred during the 1964 earthquake. Undisturbed loose samples of sand were tested in the laboratory using the cyclic triaxial test apparatus. The cyclic strength thus determined at each depth of the deposits at the two sites was incorporated into the simple liquefaction analysis which was carried out on the basis of the ground surface acceleration records obtained at the basement of a nearby apartment building during the 1964 earthquake. The results of the analysis indicated the behaviors of two sites that were in accord with the actual performances observed at the time of the earthquake.
