Abstract
Sand compaction is a useful method to mitigate liquefaction. In actual design procedure, there is a need to determine an adequate compaction depth and width. Unlike the compaction depth, it is relatively difficult, however, to determine the suitable width of compaction area.This paper investigates the effects of the width of the compaction area, the width of the structure, and the height-to-width ratio of the structure on the settlement of the structure due to sand liquefaction.A series of shaking table tests on saturated sand bed-model structure system was conducted to take into account the above three variables. A special method was developed for preparing model ground with densified area. It can be concluded from the shaking table test results that the settlement of the structure decreases with increasing width either of the densified area or of the structure, and with decreasing height-to-width ratio of the structure.
