STUDY ON THE EFFECT OF DEFORMATION CONTROL FOR EMBANKMENT DURING LIQUEFACTION BY USING GEOSYNTHETIC SANDWICHED BETWEEN GRAVEL

Abstract

Centrifuge model tests and dynamic effective stress FEM analyses were carried out to evaluate the effect of deformation control method for embankment by using geosynthetic sandwiched between gravel. The cases carried out were 1)no counter measure, 2)geosynthetic, 3)this new method. The settlement of shoulder of the slope decreased nearly 35% by using this new method compare to no counter measure case. Case2) showed only 15% decreased. Horizontal expansion between the toes of slope also decreased about 70%. In addition, measured acceleration of embankment after liquefaction in all case decreased significantly. By using dynamic stress analysis, general tendency of this deformation control effect could be simulated. This new counter measure is expected as a promising candidate to keep the embankment robust during liquefaction.