INFLUENCE OF A FREEZE AND THAW CYCLE ON LIQUEFACTION RESISTANCE OF SANDY SOILS

概要

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Laboratory tests were conducted on Toyoura sand and the sand mixed with two kinds of fines to investigate the disturbance caused by a freeze and thaw cycle. Specimens whose liquefaction resistance had been increased by pre-straining under drained conditions were frozen unidirectionally. The liquefaction resistances of the specimens after thawing were compared with the resistance before freezing. It was found that : (1) The clean sand sample was not disturbed by a freeze and thaw cycle under drained conditions, if the confining stress during freezing and thawing was higher than 20 kPa; (2) the liquefaction resistances of the samples with fines were affected by the freeze and thaw cycle under drained conditions; and (3) "sample quality index" that indicates the degree of disturbance due to a freeze and thaw cycle was nearly uniquely related with volumetric expansion during freezing.
社団法人地盤工学会の論文
1993-12-15