| 考虑干密度与含水率的压实粉土持水性能研究 |
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| 引用本文： | 周洪文,仇在林.考虑干密度与含水率的压实粉土持水性能研究[J].路基工程,2016,0(1):92-95. |
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| 作者姓名： | 周洪文 仇在林 |
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| 作者单位： | 河南省交通运输厅高速公路洛阳管理处, 河南洛阳 471000 |
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| 摘 要： | 为研究豫东黄河冲积粉土的持水特性,采用压力板仪研究了脱湿过程中粉土土水特征曲线的干密度与压实含水率效应,着重分析了粉土特殊孔隙结构对其持水性能的影响。结果表明:干密度对粉土土水特征曲线形态影响较小,均表现为典型的双折线形。在小基质吸力时,压实干密度越大,相同基质吸力时粉土体积含水率越小,但随着基质吸力增大并超过某一临界值后,压实干密度越大,体积含水率越大。这与粉土样中黏粒含量偏少,从而导致其类"骨架"结构有关。制样含水率对粉土土水特征曲线也存在一定的影响,表现为初始含水率越大,体积含水率越大,但进气值基本
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| 关 键 词： | 粉土 土水特征曲线 含水率 干密度 |
| 收稿时间： | 2019-11-11 |
Research on Water Holding Capacity of Compacted Silt with Dry Density and Water Content |
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| Abstract: | In order to study the water holding capacity of Yellow-River alluvial silt in south Henan Province, the pressure plate apparatus was adopted to study effect of dry density and compacted water content in the silt-water characteristic curve and the influence of special pore structure of silt on the water holding capacity was mainly analyzed.The results show that dry density has minor impact on the shape of silt-water characteristic curve, presenting typical double line shape.When the matric suction is small, the dry density of compaction is big;the volumetric water content of silt is smaller under the same matric suction.On the contrary, when the suction is larger than the marginal value, the bigger the dry density of compaction is, the bigger the volumetric water content is.It’s related to the less clay content in the silt, which forms "skeleton" structure.The sample water content also has a certain impact on the silt-water characteristic curve.The bigger the initial water content is, the bigger the volumetric water content is, but the air suction is basically the same. |
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