LIQUEFACTION RESISTANCE OF TWO ALLUVIAL VOLCANIC SOILS SAMPLED BY IN SITU FREEZING
LIQUEFACTION RESISTANCE OF TWO ALLUVIAL VOLCANIC SOILS SAMPLED BY IN SITU FREEZING
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原位冷冻取样的两种冲积火山土的抗液化能力
DOI：
10.3208/sandf1972.25.3_49
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发表时间：
1985
影响因子：
3.7
通讯作者：
Yoshio Suzuki
中科院分区：
文献类型：
--
作者：
M. Hatanaka;M. Sugimoto;Yoshio Suzuki
两个新的提高效率的原位冻结土壤取样技术被用来获得未受干扰的样品的饱和冲积火山土，当地称为“白苏”，从鹿儿岛市，日本。不排水循环三轴试验进行了原状冲积白须样品从5.4至6.0米的深度在现场A，从8.4至10.5米的深度在现场B，他们已经解冻后。为了研究试样扰动的影响，还对重塑试样进行了不排水循环三轴试验。在室内试验的基础上，对现场抗液化强度进行了估算。结果表明：（1）原位冻结取样技术在现场取得了两项新的进展;（2）与原状土样相比，A区原状土样的抗液化强度约为原状土样的45 ~ 50%，而原状土样的抗液化强度与A区原状土样的抗液化强度基本相同。而位于B地点的再造土样，其相对密度较原状土样高13至20个百分点，约为62至67%。
Two new improved-efficiency techniques for soil sampling by in situ freezing were used to obtain undisturbed samples of saturated alluvial volcanic soils, locally termed "Shirasu", from Kagoshima city, Japan. Undrained cyclic triaxial tests were conducted on the undisturbed alluvial Shirasu samples obtained from a depth of 5.4 to 6.0 m at site A, and from a depth of 8.4 to 10.5 m at site B, after they had been thawed. For studying the effects of sample disturbance, undrained cyclic triaxial tests were also conducted on the reconstituted specimens. The liquefaction resistance in the field was estimated based on the laboratory tests. Based on the above studies it was shown that (1) two new developments in the technique of sampling by in situ freezing were successfully achieved in the field, and (2) compared with the liquefaction resistance of the undisturbed samples, that of the reconstituted samples from site A, all of which had about the same density, was about 45 to 50% of the value for undisturbed samples, and that of the reconstituted samples from site B, with relative density 13 to 20 percentage points higher than that of undisturbed samples was about 62 to 67%.