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LIQUEFACTION-INDUCED GROUND DISPLACEMENT TRIGGERED BY QUAYWALL MOVEMENT

1998; Volume: 38; Issue: Special Linguagem: Inglês

10.3208/sandf.38.special_85

1341-7452

Masanori Hamada, Kazue Wakamatsu,

Geotechnical Engineering and Soil Mechanics

Liquefaction-induced large ground displacement triggered by quaywall movement is investigated by case studies on the 1995 Hyogoken-Nambu and the 1964 Niigata earthquakes, and by a shaking table experiment on model ground. Permanent ground strain is dicussed, as is its relationship with the damage rate to buried water and sewage pipes. The followings are obtained by summarizing the results of the case studies and the experiment : (1) the magnitude of the ground displacement 200-300 m away from the quaywall is still governed by the quaywall movement; (2) the damage rate of buried pipes for water and sewage has a close correlation with the tensile ground strain in the axial direction; (3) the behavior of the liquefied soil due to a boundary movement varied greatly depending on the magnitude of the boundary movement. The liquefied soil behaves as a solid body when the boundary movement is large. On the contrary, it behaves as a liquid when the boundary movement is small.