Empirical equations for calculating the rate of liquid flow through GCL-geomembrane composite liners
Empirical equations for calculating the rate of liquid flow through GCL-geomembrane composite liners
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DOI：
10.1680/gein.2006.13.2.73
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发表时间：
2006-04
影响因子：
4.5
通讯作者：
N. Touze-Foltz;M. Barroso
中科院分区：
文献类型：
--
作者：
N. Touze-Foltz;M. Barroso
本文提出了计算含GCL的复合衬层对流流率的方程。平流是由于土工膜中存在缺陷，并取决于土工膜和GCL之间的接触条件。本文根据实验数据，定量定义了土工膜与土工合成粘土衬垫的接触条件。因此，经验方程提出了两个不同的范围内的直径为圆形缺陷：2至20毫米和100至600毫米。获得的最小范围的直径的经验方程的有效性与实验结果和现有的经验方程进行比较。本文中开发的经验方程，然后结合在一个简单的分析解决方案，导致半经验方程，允许一个预测流速为窄和宽的缺陷，考虑到流动发生在两端的这些缺陷的有限长度。一项参数研究表明，通过一个相关的...
This paper presents equations for the evaluation of advective flow rates though composite liners involving GCLs. Advective flow is due to the existence of defects in the geomembrane, and depends on the contact condition between the geomembrane and the GCL. In this paper the geomembrane-geosynthetic clay liner contact condition is quantitatively defined, based on experimental data. Accordingly, empirical equations are presented for circular defects having diameters in two different ranges: 2 to 20 mm and 100 to 600 mm. The validity of the empirical equation obtained for the smallest range of diameters is compared with experimental results and with an existing empirical equation. The empirical equations developed in this paper are then combined in a simple analytical solution, leading to semi-empirical equations that allow one to predict flow rates for narrow and wide defects, taking account of the flow that takes place at both ends of these defects of finite length. A parametric study shows, through a corr...