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9-1Šª
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1994”N
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85-90•Å
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Œf�ÚŽGŽ��i‰p�j�F
PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
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Yutaka NAKAMURA, Kazutoshi HIDAKA, Masayuki NISHINAGA
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DAMAGE MECHANISM FOR DAMAGE EXPERIENCED EMBANKMENT ESTIMATED BY MICROTREMOR MEASUREMENT
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Many embankments were damaged by the 1993 Kushiro-Oki Earthquake and the 1993 Hokkaido Nansei-Oki Earthquake. We measured microtremors on and near the damaged experienced embankments. In this paper the measurements of a rather heavily damaged embankments are described. Main results are as follows: (1)Indexes K�¡, K�¡, and K, proposed by Nakamura et al.�¡, are useful for the damage estimation of the embankment and the foundation ground. (2)The value of K�¡, K�¡ and K become higher at the damage parts of the embankment and of the ground, corresponding to the estimated strain of 10�¡ or over.
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