| 利用水银测孔资料分析洛川塬黄土地层透水的最小孔径 |
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| 引用本文： | 李云峰.利用水银测孔资料分析洛川塬黄土地层透水的最小孔径[J].地球科学与环境学报,1990(1). |
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| 作者姓名： | 李云峰 |
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| 作者单位： | 西安地质学院水工系 |
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| 摘 要： | 粘性土的透水性首先取决于孔隙的大小,其次是孔隙的多少。本文在对洛川塬黄土地层进行水银测孔试验和渗透试验的基础上,用曲线图分析法及逐步回归分析法对自变量进行筛选,找出了黄土地层透水的最小孔径大于5μm,并以此推算出黄土地层中结合水的厚度约是水分子直径的9000倍。文中还建立了描述渗透系数与透水孔隙孔容关系的随机数学模型,开辟了一条通过水银测孔取得粘性土渗透系数值的新途径。
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| 关 键 词： | 洛川塬黄土地层 水银测孔试验 逐步回归分析 变量筛选 结合水厚度 |
AN ANALYSIS OF THE SMALLEST PERMEABLE APERTURE IN THE LUOCHUAN LOESSLAYERS USING THE DATAON DETERMINING HOLES BY THE MERCURY-INJECTION METHOD |
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| Li Yunfeng.AN ANALYSIS OF THE SMALLEST PERMEABLE APERTURE IN THE LUOCHUAN LOESSLAYERS USING THE DATAON DETERMINING HOLES BY THE MERCURY-INJECTION METHOD[J].Journal of Earth Sciences and Environment,1990(1). |
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| Authors: | Li Yunfeng |
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| Institution: | Xi'an College of Geology |
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| Abstract: | The Permeability of clayed soil is depended first on the hole dimensions, and secondly on the amounds of the holes. Based on the tests of determining holes by the mercury-injection method and the tests about the permeability of the Luochuan loess layers, this paper sifted out the independent variables by using the curve-analysis method and the progressive regression method, and has discovered that the smallest permeable aperture of the loess layers is more 5 mm. From this it has calculated that the thickness of the combined water in the loess layers is about 9000 times larger than the water molecule diameter.
In this paper the author has also set up a stochastic methematical model which can be used to describe the permeability coefficient and the relations between the aperture crack and the aperture capacity. He has started a new way for obtaining the permeability values of clayed soil by the mercury-injection method |
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| Keywords: | Luochuan loess layers test of determining holes by mercury-inlection method Progressive regression analysis sifting variables thickness of combined water |
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