Experimental Investigation of the Permeability of Composite Geomembrane
详细信息
- 责任者：Zhang Guangwei (Key Lab. of Mechanics on Western Disaster & Environment ; MOE ; Lanzhou University ; Lanzhou 730000 ; China) ; Zhang Huyuan
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2011
- 卷期：38(5)
- 关键词：土工膜 ; geomembranes ; 渗透性 ; permeability
- 页码：p.58-62
- 图表：4 illus., 2 tables, 15 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
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. The 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 pressurel 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.
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