非织造土工布孔径分布与渗透性能关系的研究

Study on the Relation between Opening Sizes Distribution and Permeability of Nonwoven Geotextiles

在过滤和排水领域中 ,非织造土工布的孔径及其分布是一项非常重要的指标 ,与土工布的渗透性能密切相关。本文在前人研究的基础上利用PoissonPolyhedron理论对非织造土工布的理论孔径分布和最大孔径进行了研究 ,得出非织造土工布孔径分布与渗透性的关系。

In the field of filtration and drainage, opening sizes and its distribution of nonwoven geotextiles are the most important parameters, which are directly related to its permeability. In this paper, based on the former researchers′ works, the theoretical opening sizes distribution and maximum opening size of nonwoven geotextile are studied by the means of Poisson Polyhedron theory. And further more, the relation between nonwoven geotextile opening sizes distribution and its permeability is derived by using Hagen Poisseuille Law. The theoretical calculation value of vertical permeability coefficient is approximately agreeable to the experimental result for a nonwoven geotextile sample. The results got from this paper are significant for further investigation.