Abstract
Some sedimentation test on small scale sandy deposits were carried out and the shear resistance of sand layers before and after sedimentation were measured. The experimental result showed that the thickness of sand deposits showing lower shear resistance increases with increasing the vertical distance of possible sedimentation, which indicates the disturbed soil fabric during sedimentaiton. The disturbed soil fabrics formed during the sedimentation of soil particles which moved with the upward flow of water after liquefaction is thus believed to be one of the mechnisms leading to the occurence of re-liquefaction.
