From comparing the results of the sand and the sand with fines, it is found that the clay content plays a very important role in filtration behavior of soil-geotextile system.

• 试验结果显示黏土含量对于过滤行为有相当大的影响；经与无黏土之情况加以比较，更突显黏土含量对于土壤-地工织物过滤系统的显著影响。