| 细粒对砂土持水能力影响的试验研究 |
| |
| 引用本文： | 田湖南,孔令伟.细粒对砂土持水能力影响的试验研究[J].岩土力学,2010,31(1):56-60. |
| |
| 作者姓名： | 田湖南 孔令伟 |
| |
| 作者单位： | 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点实验室,武汉,430071 |
| |
| 摘 要： | 利用压力板仪,进行了不同细粒含量非饱和砂土的持水特征试验,分析砂土土-水特征曲线的特征,探讨细粒对砂土持水能力的影响。结果表明,细粒的增加提高了砂土的持水能力,不同吸力阶段细粒对持水能力的影响程度不同;基质吸力超过进气值后,细粒增加明显增强砂土持水能力。应用数学模型θ=a+b(1+(φ/c)d)描述不同细粒含量砂土的土-水特征曲线,分析了细粒含量对数学模型参数的影响,给出了细粒、基质吸力和含水率的函数关系为θ=f(φ,fc)。
|
| 关 键 词： | 细粒含量 砂土 持水能力 土-水特征曲线 |
| 收稿时间： | 2009-07-18 |
Experimental research on effect of fine grains on water retention capacity of silty sand |
| |
| TIAN Hunan,KONG Ling-wei.Experimental research on effect of fine grains on water retention capacity of silty sand[J].Rock and Soil Mechanics,2010,31(1):56-60. |
| |
| Authors: | TIAN Hunan KONG Ling-wei |
| |
| Institution: | State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071 |
| |
| Abstract: | Experimental research on water retention characteristics of sand with different fine grains is carried out by pressure plate test to analyze the effect of fine grains on the soil water characteristic curve (SWCC). The results show that the water retention capacity of unsaturated sand enhanced with fine grains increase; while, the effect is varied in the regime of SWCC. The water retention capacity enhanced significantly when suction beyond air-entry value. is advanced to describe the SWCC of silty sand. Then, the effect of fine grain content of silty sand on the parameters of SWCC equation is analyzed; and the relationship of fine grain, suction and water content is described by . |
| |
| Keywords: | fine content sand water retention characteristics SWCC |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
