INFLUENCE OF A FREEZE AND THAW CYCLE ON LIQUEFACTION RESISTANCE OF SANDY SOILS
INFLUENCE OF A FREEZE AND THAW CYCLE ON LIQUEFACTION RESISTANCE OF SANDY SOILS
复制标题
冻融循环对砂土抗液化能力的影响
DOI：
10.3208/sandf1972.33.4_148
复制
发表时间：
1993
影响因子：
3.7
通讯作者：
G. Shigeru
中科院分区：
文献类型：
--
作者：
G. Shigeru
对丰浦砂和掺有两种细粉的丰浦砂进行了冻融循环扰动试验。在排水条件下通过预应变增加抗液化性的试样被单向冷冻。比较了冻融前后试件的抗液化强度。结果发现：（1）在排水条件下，当冻融围压大于20 kPa时，纯砂试样不受冻融循环的影响，（2）排水条件下，冻融循环对细砂试样的抗液化性能有影响;以及（3）“样品质量指数”，其指示由于冻融循环引起的扰动程度与冷冻期间的体积膨胀几乎唯一相关。
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.