| Study on the Relation between Individual Layer and Multi-layered Nonwoven Geotextile Permeability |
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| 作者姓名： | 刘丽芳 储才元 |
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| 作者单位： | State Key Laboratory of Concrete Materials Research，Tongji University，Shanghai 200092，College of Textiles，Dongkua University，Shanghai 200051 |
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| 摘 要： | Water permeability is an important property of nonwoven geotextiles used in drainage field, and usually it is obtained by testing individual layer or multi-layered nonwoven geotextiles. However, the permeability coefficient tested by using different layers would be different for the same nonwoven geotextile. In this paper, the relation between them is studied based on Darcy's law. The study shows that vertical permeability coefficients are theoretically invariable no matter how many layers are tested; but experimental results show that vertical permeability coefficients decrease with the increase of nonwoven geotextile layers number.
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Study on the Relation between Individual Layer and Multi-layered Nonwoven Geotextile Permeability |
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| LIU Li-fang State Key Laboratory of Concrete Materials Research,Tongji University,Shanghai CHU Cai-yuan College of Textiles,Donghua University,Shanghai.Study on the Relation between Individual Layer and Multi-layered Nonwoven Geotextile Permeability[J].Journal of Donghua University,2003,20(2). |
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| Authors: | LIU Li-fang State Key Laboratory of Concrete Materials Research Tongji University Shanghai CHU Cai-yuan College of Textiles Donghua University Shanghai |
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| Institution: | 1. State Key Laboratory of Concrete Materials Research, Tongji University, Shanghai 200092
2. College of Textiles, Donghua University, Shanghai 200051 |
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| Abstract: | Water permeability is an important property of nonwoven geotextiles used in drainage field, and usually it is obtained by testing individual layer or multi-layered nonwoven geotextiles. However, the permeability coefficient tested by using different layers would be different for the same nonwoven geotextile. In this paper, the relation between them is studied based on Darcy's law. The study shows that vertical permeability coefficients are theoretically invariable no matter how many layers are tested; but experimental results show that vertical permeability coefficients decrease with the increase of nonwoven geotextile layers number. |
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| Keywords: | nonwoven geotextile permeability permeability resistance coefficient permittivity vertical permeability coefficient |
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