SYMPOSIA PAPER Published: 01 January 1990
STP23500S

Structural Study of Porometry and Filtration Opening Size of Geotextiles

Source

The use of geotextiles as filters involves the prior determination of filter criteria. The filtration opening size, Of, is used as characteristic geotextile parameter for the retention criterion. Until now, Of has been determined by an experimental procedure. In this paper, the authors propose a theoretical approach, based on a structural model applied to nonwoven geotextiles. The geotextile is modelled on the basis of the Poissonian polyhedra method, and the distribution of “conduits” passing through the geotextile is defined and evaluated. Once the textile structure has been modelled, particular attention is given to the hydrodynamic sieving test, which provides a means of measuring Of. A theoretical approach is used to simulate cyclic test conditions and to propose a parametric study for optimizing test conditions. This theoretical approach is systematically supported by an experimental validation. The proposed method is the first of its kind to provide a realistic means of forecasting the filtration opening size of nonwoven geotextiles.

Author Information

Faure, YH
IRIGM, University Joseph Fourier, Grenoble, France
Gourc, JP
IRIGM, University Joseph Fourier, Grenoble, France
Gendrin, P
IRIGM, University Joseph Fourier, Grenoble, France
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Details
Developed by Committee: D35
Pages: 102–119
DOI: 10.1520/STP23500S
ISBN-EB: 978-0-8031-5135-2
ISBN-13: 978-0-8031-1298-8