水文地质工程地质2011，Vol.38Issue(5)：58-62,5.
复合土工膜渗透性能试验研究
Experimental investigation of the permeability of composite geomembrane
摘要
Abstract
High density polyethylene composite geomembrane is used as a test material and the flexible wall permeameter is used to calculate the coefficient of the composite geomembrane. Changes in hydraulic coefficients with osmotic pressure and osmotic stress path are analysed. Scanning electron microscope photographs from microcosmic structure reveals the reason for the changes in hydraulic coefficients. The test results show that the flexible wall permeameter can accurately determine the geomembrane hydraulic parameters. When the composite geomembrane is functioned under the effective stress of 0. 1 Mpa, the osmotic pressure increases from 0. 1 Mpa to 0. 6 Mpa, causing 3 kinds of change trends of the hydraulic coefficient: (1) basically unchanged, ( 2 ) increase with the increasing osmotic pressure, and ( 3 ) decrease with the increasing osmotic pressure. The inhomogeneity of the physical properties of the composite geomembrane and penetration channel pattern are the main factors influencing the impervious effect.关键词
柔性壁渗透仪/复合土工膜/渗透系数/渗透压Key words
flexible-wall permeameter/composite geomembrane/hydraulic coefficient/osmotic pressure分类
天文与地球科学引用本文复制引用
张光伟,张虎元,杨博..复合土工膜渗透性能试验研究[J].水文地质工程地质,2011,38(5):58-62,5.基金项目
国家自然科学基金(50678075) （50678075）
