中文摘要：

重点对迁移机理下污染物填埋场地天然粘土隔离屏障的厚度设计展开研究。运用溶质在饱和土中迁移的一维平流-弥散运移模型,根据影响污染物迁移的基本参数（弥散系数、阻滞因子等）,对饱和土隔离屏障建立一套估算污染物击穿屏障的时间、对指定的击穿浓度和设计寿命确定屏障厚度的设计分析方法,绘制了一些便于工程应用的设计图表,分析了扩散系数、渗流速度对屏障击穿时间的影响。

英文摘要：

In this paper,the width of clayey landfill barriers considering the migration of contaminant solute was researched.The equation of one-dimensional advection-diffusion transport model was applied to describe the migration of contaminant solute through saturated soil.A design method was established to estimate the break-through time and to calculate the width of landfill barriers under the supposed containment and design life by the use of migration coefficients（for example,diffusion coefficient and retardation factor etc）.Some curves used for the design of engineering project were drawn.The effect of diffusion coefficient and advection velocity on break-through time was also analyzed.