EFFECTS OF REMEDIAL AGAINST LIQUEFACTION AT 1993 KUSHIRO-OKI EARTHQUAKE(1994)
S.Iai（Port and Harbour Reseach Institute）・Y.Matsunaga（Port and Harbour Reseach Institute）・T.Morita（Port and Harbour Reseach Institute）・M.Miyata（Port and Harbour Reseach Institute）・H.Sakurai（Port and Harbour Reseach Institute）・H.Oishi（NKK Corp）・H.Ogura（GEOTOP）・Y.Ando（FUDO Constraction Co）・Y.Tanaka（Konoike Construction ｃｏ.・Ltd）・M.Kato（Konoike Construction ｃｏ.・Ltd）
During the 1993 Kushiro-Oki Earthquake of magnitude 7・8 , Kushiro Port being located at 15 km from the epicenter was shaken with a peak horizontal acceleration of 0.47g. Many of the quay walls at the Kushiro Port suffered damage due to liquefaction of backfill sand. However, the quay walls having backfill sand compacted as measures against liquefaction survived the earthquakewithout damage. In these quay walls, gravel drains were also used as a part of the liquefaction remediation in the vicinity of the walls. Since the contrast in the performance of those quay walls are of significance in the engineering practice, the present paper is devoted to report the details including the recorded earthquake motions and the ground conditions.