Abstract
Saturated undrained cyclic triaxial tests were performed to validate liquefaction counter measure on relative density Dr:65%, Dr:65% cement grouted and Dr:90% well compacted Ninohe Shirasu soil, under confining pressure of 90-100kPa. Cement grouted and Dr:90% soil generated positive dilatancy and effective stress recovered to initial value due to negative pore water pressure. And each cement grouted soil and Dr:90% soil liquefaction resistance increased 2.5 times and 3.3 times greater than Dr:65% soil. By referencing cyclic tests results, soil-water coupled FEM-FDM code material parameter set could be decided, and each earthquake behavior of Dr:65% and Dr:90% Shirasu ground was verified. The behavior of well compacted Dr:90% ground was better performance than Dr:65% one .
