Predicting the hydraulic conductivity of saturated clays using plasticity-value correlations
Predicting the hydraulic conductivity of saturated clays using plasticity-value correlations
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DOI：
10.1016/j.clay.2009.04.001
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发表时间：
2009-06-01
影响因子：
5.6
通讯作者：
Dolinar, Bojana
中科院分区：
文献类型：
--
作者：
Dolinar, Bojana
导水率是土体重要的基本工程性质之一。然而，作为一种土壤参数，它很难测量，而且可能是高度可变的，需要对大量样本进行调查。出于这些原因，一些研究人员提出了各种间接方法，用于从容易测量和常规获得的数据中预测土壤的水力传导性。由于塑性是粘土最独特和最容易测量的性质，因此它将是预测粘土水力传导性的一个非常方便的依据。为此，使用了五个膨胀粘土和非膨胀粘土样品。室内试验结果表明，当考虑粘土颗粒的外表面积时，可以很好地确定粘土在选定孔隙率下的渗透系数。粘土的Atterberg极限与其外比表面之间存在精确定义的关系，这一发现有助于我们用孔隙率和塑性值来表示水力传导性。(C)2009爱思唯尔B.V.保留所有权利。
Hydraulic conductivity is one of the important, basic engineering properties of soils. However, as a soil parameter it is difficult to measure and can be highly variable, necessitating the investigation of a large number of samples. For these reasons several researchers have proposed various indirect methods for predicting the hydraulic conductivity of soils from easily measured and routinely obtainable data. As plasticity is the most distinctive and the easiest property of clays to measure, it would be a very convenient basis for predicting the hydraulic conductivity.This paper focuses on an investigation of the relationship between the hydraulic conductivity of clays and their Atterberg limits. For this purpose five samples of expanding and non-expanding clays were used. The results of laboratory tests showed that the hydraulic conductivity of a clay at a selected void ratio could be adequately determined when the external surface area of the clay grains was considered. The finding that there exists an exactly defined relationship between the Atterberg limits of clays and their external specific surfaces helped us to express the hydraulic conductivity in terms of the void ratio and the plasticity value. (C) 2009 Elsevier B.V. All rights reserved.