Abstract This study reports data and findings from shake table tests performed on loosely compacted unsaturated well graded materials containing a wide range of particle sizes and significant fines contents of 18 to 28%. The results are useful for understanding the fundamental cyclic liquefaction behaviour of these unsaturated well graded materials when subjected to vertical cyclic loading conditions relevant to repetitive transport loading or during bulk cargo shipping transportation. Liquefaction was observed in all the shake table tests performed on the well-graded materials, which were prepared at relative densities of 50 to 60% and degrees of saturation ranging from 50 to 70%. Large settlements were also observed in the columns of the well-graded materials, which resulted in significant increases in the degree of saturation towards fully saturated states. Migration of fines throughout the well-graded materials was also observed, which also contributed to settlement and resulted in different local densities and fines contents throughout the column. The resulting build-up in pore pressures, settlements and accompanying increases in degree of saturation and movement of moisture throughout are presented and compared with shake table tests performed on columns of partially saturated clean sand for which liquefaction was not observed.

中文翻译：

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研究部分饱和松散非塑性土液化的柱试验

摘要 本研究报告了对松散压实的不饱和分级良好的材料进行的振动台测试的数据和结果，这些材料包含各种粒度和 18% 至 28% 的显着细粉含量。结果有助于理解这些不饱和分级良好的材料在与重复运输载荷相关的垂直循环载荷条件下或在散装货物运输过程中的基本循环液化行为。在对分级良好的材料进行的所有振动台试验中都观察到液化，这些材料是在 50% 到 60% 的相对密度和 50% 到 70% 的饱和度范围内制备的。在分级良好的材料的柱子中也观察到大的沉降，这导致饱和度向完全饱和状态显着增加。还观察到细粒在整个分级良好的材料中的迁移，这也有助于沉降并导致整个柱子的局部密度和细粒含量不同。展示了由此产生的孔隙压力增加、沉降以及随之而来的饱和度和水分运动的增加，并与在未观察到液化的部分饱和的干净砂柱上进行的振动台测试进行了比较。