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中文摘要：
砂土的动力和冻融效应是抗震设防区及季冻区试验研究的热点,而饱和度是影响砂土动力和冻融效应试验结果的关键因素。为保证土样的饱和程度,提高饱和效率,以饱和方法、饱和时间和土样干密度为因素,进行了银川粉砂土样的饱和特性试验研究。通过分析作用规律和机理,建立了粉砂土样饱和度与饱和时间、干密度间显著的关系模型,确定了银川粉砂土样合理的饱和方法及饱和时间。结果表明：在含水率为8.0%的条件下,银川粉砂土样的饱和度与饱和时间呈双曲线关系;毛细管法土样的饱和度低,随干密度的增大,饱和度增大,饱和速度减小;真空法土样的饱和度高,饱和速度随干密度的增大而增大,稳定饱和度与干密度近乎无关。
英文摘要：
The dynamic and freeze-thaw effects of sand are the hot topics in the seismic fortification zone and the seasonal frost zone, but saturation is the key factor influencing the test results of the dynamic and freeze-thaw effects. In order to ensure the saturation degree of soil samples, and improve the saturation efficiency, the saturated characteristics of silt in Yinehuan were studied considering the factors of saturation method, saturation time and dry density of soil sample. The re- markable relational model between saturation and saturation time and dry density is established, and the reasonable satura- tion method and the saturation time of sih in Yinchuan are determined based on the analysis of the law and mechanism of action. The experimental results show that under the condition of the water content of 8%, the saturation time of silt in Yinchuan is hyperbolic. Saturation of soil sample is low by capillary method. With the increase of the dry density, the saturation increases and the saturation velocity decreases. However, saturation of soil sample is high by vacuum method. And the saturation velocity increases with the increase of dry density, while the stable saturation is ahnost independent of the dry density.
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