Geosynthetic capillary barriers: current state of knowledge-Reference-Cited by-同舟云学术

Geosynthetic capillary barriers: current state of knowledge

Published:2010-10 Issue:5 Volume:17 Page:273-300
ISSN:1072-6349
Container-title:Geosynthetics International
language:en
Short-container-title:Geosynthetics International

Author:

Zornberg J.G.¹,Bouazza A.²,McCartney J.S.³

Affiliation:

1. Fluor Centennial Associate Professor, The University of Texas at Austin, Civil Engineering Department-GEO, 1 University Station C1792 Austin, TX 78712-0280, USA, Telephone: +1 512 232 3595, Telefax: +1 512 471 6548, E-mail: zornberg@mail.utexas.edu

2. Associate Professor, Monash University, Melbourne, Australia, Telephone: +61 3 9905 4956, Telefax: +61 3 9905 4944, E-mail: malek.bouazza@eng.monash.edu.au

3. Assistant Professor and Barry Faculty Fellow, University of Colorado at Boulder, Department of Civil, Environmental, and Architectural Engineering, UCB 428, Boulder, CO 80309, USA, Telephone: +1 303 492 0492, Telefax: +1 303 492 7317, E-mail: john.mccartney@colorado.edu

Abstract

ABSTRACT: This paper provides theoretical background, laboratory data and full-scale measurements useful in understanding the interaction between soils and geosynthetics under unsaturated conditions. It also includes an evaluation of the current state of knowledge regarding the hydraulic properties of porous geosynthetics under unsaturated conditions relevant for geosynthetic capillary barrier design. These properties include the water retention curve and the hydraulic conductivity function. In addition, the mechanisms involved in the development of capillary barriers are evaluated to explain the storage of water at the interface between materials with contrasting hydraulic conductivity (e.g. a fine-grained soil and a nonwoven geotextile). Finally, specific applications are presented to illustrate new opportunities and applications that may result from a better understanding of the unsaturated hydraulic properties of geosynthetics. Experimental data are provided illustrating that geosynthetic capillary barriers are superior to soil-only capillary barriers. Based on this observation, it is emphasized that no capillary barrier should be designed without consideration of the enhanced performance offered by the inclusion of nonwoven geotextiles under the fine-grained soil component of the cover.

Publisher

Thomas Telford Ltd.

Subject

Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/gein.2010.17.5.273

Reference94 articles.

1. Managing Soil Moisture on Waste Burial Sites in Arid Regions

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