To evaluate the effect of geosynthetic reinforcement on the embankment, designed by the geosynthetic reinforcing method, the method used as a countermeasure against liquefaction, shaking table tests, slip circular stability analyses and two-dimensional seismic deformation analyses have been carried out. From the results of these tests and analyses, it is clarified that the fatal destruction of embankments could be mitigated to some degree, with the maintenance of the function of embankment. And easy and efficient restoration works can be achieved.
Based on these results, the seismic design procedure for geosynthetic reinforced embankments on a foundation with liquefaction characteristics is proposed using slip circular method. In that it is clarified that the required reinforcement tends to increase in the case of effective stress method and it tends to decrease in the case of total stress method. Finally the deformation mode due to the tensile force distribution at the geosynthetic reinforcement and future problematic issues on the design method in combination with other design methods against liquefaction were described in this report.