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Effect of overburden confining stress on hydraulic performance of geosynthetic clay liners (GCLs)

机译:覆盖压力压力对土工合成粘土衬里水力性能的影响(GCLS)

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摘要

Geosynthetic clay liners are a rapidly evolving geosynthetic product used in most hydraulic barrier applications in the geo-environmental industry. Continuous research has led to new insights to overcome the shortcomings faced in deploying GCLs in the field. These include shrinkage due to shear failure on side slopes, the effect of temperature variation, and inadequacy of minimum timely confinement to achieve optimum hydraulic performance. This paper presents previous experimental data and an additional dataset from this research gathered to observe the effect of overburden confining stress on GCL hydraulic conductivity and how the findings can be used to predict the performance of a geosynthetic clay liner for a given field application. An inverse power relationship is identified between these two parameters along with the reduction in the order of the degree of hydraulic conductivity depending on the permeant material passing through. A relationship is determined to estimate the GCL hydraulic conductivity as a function of the overburden confining stress, given that it is pre or post hydrated and the permeant liquid passing through the product. It is proposed that the relationship can be used to predict the GCL hydraulic performance in the field and provide guidance in improving the serviceability of hydraulic barrier designs.
机译:地质合成粘土衬垫是在地球环境工业中大多数液压阻挡应用中使用的快速发展的地质合成产品。持续研究导致了新的见解,以克服部署领域的GCLS所面临的缺点。这些包括由于侧倾的剪切故障而导致的收缩,温度变化的影响,并且最小的时间限制的不足,以实现最佳的液压性能。本文提出了先前的实验数据和来自该研究的额外数据集聚集在一起,观察覆盖压缩压力对GCL液压导电性的影响以及如何使用如何用于预测给定场应用的地质合成粘土衬里的性能。在这两个参数之间识别逆电力关系,随着通过通过通过的渗透材料而减小的液压导电程度的阶数。确定了一种关系,以估计GCL液压导电性作为覆盖物限制应激的函数,因为它是预先或后水合的并且通过产品的渗透液体。建议该关系可用于预测该领域的GCL液压性能,并在提高液压屏障设计的可用性方面提供指导。

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