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利用柔性壁渗透仪对土工合成黏土衬垫(Geosynthetic Clay Liner,GCL)的渗透系数进行测定时,试验条件的设置会对测定结果产生重要的影响。文章阐述了有效应力、渗透溶液特性、预水化、水力梯度以及试验终止标准等试验条件对GCL渗透系数的影响机理,介绍了过去20年GCL渗透系数测定技术的发展历程,重点分析了目前GCL渗透系数测定过程中尚存在的问题。本研究有助于正确认识已有数据和结论,同时对后续试验的开展也具有一定的指导意义。
When the permeability coefficient of geosynthetic clay liner (GCL) is measured by flexible wall permeameter, the setting of test conditions will have an important effect on the determination results. In this paper, the mechanism of the influence of experimental conditions such as effective stress, permeation solution properties, prehydration, hydraulic gradient and test termination standards on the permeability coefficient of GCL is introduced. The development of GCL permeability measurement technology in the past 20 years is introduced. The current GCL Problems still exist in the determination of permeability coefficient. This study helps to correctly understand the existing data and conclusions, and also has certain guiding significance for the follow-up test.