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Study on the Relation between Individual Layer and Multi-layered Nonwoven Geotextile Permeability
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作者 刘丽芳 储才元 《Journal of Donghua University(English Edition)》 EI CAS 2003年第2期98-101,共4页
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 coeff... 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. 展开更多
关键词 nonwoven geotextile PERMEABILITY PERMEABILITY resistance coefficient PERMITTIVITY vertical permeability coefficient
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Performance of a Nonwoven Geotextile Reinforced Wall with Unsaturated Fine Backfill Soil
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作者 Femando Henrique Martins Portelinha Benedito de Souza Bueno Jorge Gabriel Zomberg 《Journal of Civil Engineering and Architecture》 2013年第10期1253-1259,共7页
The use of marginal backfills in GSE (geosynthetic stabilized earth) walls has not been recommended by different standards specifications. Restrictions are motivated by the poor hydraulic conductivity of fine soils ... The use of marginal backfills in GSE (geosynthetic stabilized earth) walls has not been recommended by different standards specifications. Restrictions are motivated by the poor hydraulic conductivity of fine soils that are capable of developing of water pressures. However, the use of granular materials can expend the cost of the construction. As a result, local soils, granular or not, have been increasingly used. Unsaturated conditions of fine soils may result in convenient performance even using extensible reinforcements. This paper evaluates the performance of a full scale model of a nonwoven geotextile reinforced wall constructed with fine grained soil backfill. The unsaturated condition was maintained and matric suctions, displacements and reinforcement strains were monitored during the test. Results have shown that the unsaturated condition of the backfill allowed maximum reinforcement peak strain of 0.4 %. For the case of a wrap faced wall on a firm foundation the performance and good agreement between measured strains and factors of safety from limit equilibrium analyses have shown the maintenance of unsaturated conditions as an economical alternative to the use of high quality fill. 展开更多
关键词 Reinforced soil wall nonwoven geotextile fine soil unsaturated soil.
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