| 基于Fredlund粒度分布曲线方程的中国黄土粒度分析 |
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| 引用本文： | 杨青.基于Fredlund粒度分布曲线方程的中国黄土粒度分析[J].高校地质学报,2015,21(2):268. |
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| 作者姓名： | 杨青 |
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| 摘 要： | 粒度分布曲线是土壤最基本的土性参数之一，通过数学方程预测粒度分布曲线将为工程勘察节省大量成本。Fred?
lund建立在Fredlund和Xing土水特征曲线方程基础上的粒度分布曲线方程已被证明适用于多种土类，但其对中国黄土的有
效性很少得到验证。本文采用Fredlund粒度分布曲线方程对黄土高原7个地区18个黄土样的粒度分布曲线进行了拟合，结
果表明Fredlund粒度分布曲线方程与中国黄土的粒度分布曲线拟合度高，拟合参数稳定且呈规律性变化，能够很好地反映
中国黄土的地域性。本文得到的参数可用于各个地区的粒度分布曲线预测，并对黄土粒径分析及分类具有指导意义。
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| 关 键 词： | 黄土 粒度分布曲线 土-水特征曲线 非饱和土 地域性 |
Grain-size Analysis of the Loess in China Using the Grain-size Distribution Equation |
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| YANG Qing.Grain-size Analysis of the Loess in China Using the Grain-size Distribution Equation[J].Geological Journal of China Universities,2015,21(2):268. |
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| Authors: | YANG Qing |
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| Abstract: | Grain-size distribution curve is one of the most common soil properties. It can help to reduce a large amount of engineering
cost if the soil grain-size distribution could be predicted using mathematical equations. Fredlund grain-size distribution equation based
on Fredlund and Xing soil-water characteristic curve has proved to be effective for a large number of soil types, while few literatures
have been found to verify its effectiveness for loess soils in China. This paper targets on the grain-size distribution of loess soils in 7
regions in the Chinese Loess Plateau, which were fitted with the Fredlund grain-size distribution equation. The results show that
Fredlund grain-size distribution equation fits well the grain-size distribution of loess soils in China, with the stable and regularly
changing parameters, which presents well the regional characteristics of loess soils in China. The parameters obtained in this paper can
be used to predict grain-size distribution of loess soils in these 7 different regions, the results could also provide guidance for grain-size
analysis and classification of loess soils. |
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| Keywords: | loess grain-size distribution curve soil-water characteristic curve unsaturated soils regional characteristics |
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