�@ Œf�ÚŽGŽ��i˜a�j�F “ú–{’n�k�HŠwƒVƒ“ƒ|ƒWƒEƒ€˜_•¶�W Vol�F 9-1Šª ”N�F 1994”N •Å�F 85-90•Å ’˜ŽÒ�i˜a�j�F ’†‘º�@–L�C�@“ú�‚�@˜a—˜�C�@�¼‰i�@‰ë�s ƒ^ƒCƒgƒ‹�i˜a�j�F �펞”÷“®‚ð—p‚¢‚½�·“y‚Ì’n�k”íŠQ•ª�Í �´˜^�i˜a�j�F
- ƒL�[ƒ��[ƒh�i˜a�j�F - Œf�ÚŽGŽ��i‰p�j�F PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒ�i‰p�j�F Yutaka NAKAMURA, Kazutoshi HIDAKA, Masayuki NISHINAGA ƒ^ƒCƒgƒ‹�i‰p�j�F DAMAGE MECHANISM FOR DAMAGE EXPERIENCED EMBANKMENT ESTIMATED BY MICROTREMOR MEASUREMENT �´˜^�i‰p�j�F
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. ƒL�[ƒ��[ƒh�i‰p�j�F - ‹LŽ–‹æ•ª�F - ‹æ•ª �@�@�@ˆÏˆõ‰ï˜_•¶�W