Special Issue (Ocean Engineering)Paper
EFFECT OF PLASTICITY AND NON-PLASTICITY MIXING RATIO OF FINES CONTENT ON LIQUEFACTION PREDICTION IN COASTAL AREAS
2023 Volume 79 Issue 18 Article ID: 23-18138
Details
2023 Volume 79 Issue 18 Article ID: 23-18138
Liquefaction prediction and assessment of mixed sandy soil with fines is made from modified N-values based on fines content Fc and the plasticity index IP. In this study, we conducted prototype-scale standard penetration tests and a series of undrained cyclic torsional shear tests, by focusing on the influence of changes in the plasticity, grain size and fraction of fines on the liquefaction prediction and evaluated the correlation between the modified N-value and the liquefaction strength due to the changes in these physical properties of the ground. The results show that the fines content as well as the plasticity/non-plasticity mixing ratio of mixed sandy soil with fines up to Fc=50% affect the accuracy of liquefaction prediction, and the risk of liquefaction is underestimated in cases with Fc>15% and where the plasticity index is less than 10 in the mixed sandy soil with fines.
