Abstract
On recently deposited ground such as reclaimed land, it has been confirmed that liquefied soils contain finer soils than soils liquefied in alluvial ground. Such fine soils liquefied during previous earthquakes have the following characteristics: they are non-plastic, uniform grain size and low clay content. In such cases, according to the present design specification, liquefaction resistance can be expected to increase with increasing fines content. However, there is no evidence of very strong ground motion at sites where fine soil liquefied. To investigate liquefaction resistance of such fine soils, standard penetration tests and liquefaction tests were performed in a laboratory. The results of these investigations indicated that grain size was not the principal determinant of liquefaction resistance under constant relative density, which was newly defined in this paper, and constant SPT N-values.
