This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Wei, K.Y. Articles by Duckett, K.E. Search for Related Content Social Bookmarking                         What's this?

Permeability of Soil-Geotextile Systems

USDA, ARS, Textiles and Clothing Laboratory, Knoxville, Tennessee 37916, U.S.A.

T.L. Vigo

USDA, ARS, Textiles and Clothing Laboratory, Knoxville, Tennessee 37916, U.S.A.

B.C. Goswami

The University of Tennessee, Knoxville, Tennessee 37916, U.S.A.

K.E. Duckett

The University of Tennessee, Knoxville, Tennessee 37916, U.S.A.

A specially designed laboratory-type permeameter was used to characterize liquid flow behavior through various combinations of soils and geotextile fabrics subject to different flow rates and hydrostatic pressures of water. Spunbonded geotextiles made from two different fiber types (e.g., polyester and polypropylene) were selected for the study. Volume flow rates were varied up to 21 cm/second by adjusting hydrostatic pressure differences from 2.5 to 76.2 cm.

The results suggest single layer barriers of the geotextiles alone have small effects on flow rates of water, but sand-geotextile combinations exhibited strikingly different behavior. In prewashed soil-geotextile combinations, the permeability decreased non linearly with increasing depth of soil above the fabrics, independent of the supporting fabric. For soils that were not prewashed, however, fine particles in suspension settled at the soil-water interface to produce an almost impervious layer or cake structure. This caking was a function of time and became the controlling factor of flow throughout the composite.

High clogging in even thin fabrics was observed when sand was replaced by fine material such as Kaolite. The behavior was different than that of the fine material in unwashed sand. In addition, geotextile fabrics showed low resiliency to recovery from cyclic compression. The practical interpretation of this is that the porosity of the fabric may decrease significantly with time if incorporated into structures that are subject to compressive forces.

Textile Research Journal, Vol. 55, No. 10, 620-626 (1985)
DOI: 10.1177/004051758505501009


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?