APPLICABILITY OF MLT METHOD FOR LIQUEFACTION SUPPRESSION: PRELIMINARY STUDY ON RELATIVE DENSITY INCREASE CAUSED BY BOREHOLE EXPANSION

Abstract

 This study focuses on space dilatation by using MLT method as a countermeasure of liquefaction. Relative density of sand layer is increased by space dilatation by using MLT method. First, increase of the relative density of sand layer was theoretically estimated by space dilatation theory. Then laboratory tests were conducted by a model auger screw and sand box. The results of laboratory tests showed good agreement with our estimation and increase of relative density of sand layer was verified. A field test was also conducted. The increase of relative density was not clear in clay layers but clear in sand layers a little.