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he damage to p 孟 1e丘)undations of high・ rise apartment buildings 血 at tnted large 亙 y towards south 孟 n a liquef Σ ed area du頁ng the 1995 Hyogoken − Nambu earthquake is investiga 耄ed ， The bui工 dings ， designed 壬 md constrllct¢ d in early 1980s， were supportcd on bored pre −cast conc 祀 te piles 500 in diameter and 26 m ( 13m＋ 13m)long ． An 8 − m 踊 。k layer 。f reclaimed fi11 caps a marine deposit of Holo 。。ne soll which is underlain ， at 24 − m dep畄． by a stiff layer of Pleistocen 。 sand ha舳 g N −values gr 已ater 出 an 40．凸 e 齟 肛 e and d。forrnation patterns of the p ま 1es above and below the excavated ground are observed d廿eot 達 y and with a plumb bob ， and wi 止 aborehole camera and an inc 賎nometer both 孟 nserted 至 nto the hoUow spaces ofthe piles ． respecUvely ．跏 e pile heads are fbund to have bcen displaced westwards by 40 cm ． with fa 且ures and cracks near the pile heads and around 孟 0 ・ m depth at all pnes as well as wi 血 severe outofB at about 5−m depth except fbr 血e piles in the no 曲 row 、 the dete 。ted 制 塒 e and de飾matl 。 n rnodes would be induced by the inertia force and ground displaeement in the west direction ， togeth 已r with the southward ground movem 已nt that occurred on the south 已m pa 貢 Qfthe site．

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