SHAKING TABLE TESTING OF LIQUEFIABLE GROUND IMPROVED BY MULTI-LAYER SOIL IMPROVEMENT

Abstract

The multi-layer soil improvement method which permitting partial softening and liquefaction of the ground involves placing multiple plate-like layers of improved soil in a liquefiable layer was proposed. In this study, different soil improvement methods including the proposed method were tested using shaking tables while the percentage of layers of improved soil in the ground was varied. The effectiveness for attenuating seismic ground motions and for controlling settlement was examined to assess soil improvement effects of different methods. As a result, it was found that the multi-layer soil improvement was effective for attenuating seismic motions and repression of settlement.