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Unsaturated geotechnics applied to geoenvironmental engineering problems involving geosynthetics

Bouazza, A, Zornberg, J, McCartney, JS and Singh, RM (2013) Unsaturated geotechnics applied to geoenvironmental engineering problems involving geosynthetics Engineering Geology, 165. pp. 143-153.

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Abstract

Movement of fluids in the unsaturated zone plays an important role in many geoenvironmental engineering problems. Examples include cover and basal liner systems for waste containment facilities where geosynthetics are widely used, amongst many other examples. This paper highlights the importance of assessing the unsaturated characteristics of geosynthetics and their influence on the behaviour of engineered systems where soils and geosynthetics interact under unsaturated conditions. It includes information on the water retention curve and hydraulic conductivity function of geosynthetics such as geotextiles and geosynthetic clay liners (GCLs) with particular focus on capillary barriers, liner performance under elevated temperatures, and interface friction respectively. 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). Potential desiccation of GCLs is explained in the light of an application in a liquid waste impoundment.

Item Type: Article
Subjects : Civil Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
AuthorsEmailORCID
Bouazza, AUNSPECIFIEDUNSPECIFIED
Zornberg, JUNSPECIFIEDUNSPECIFIED
McCartney, JSUNSPECIFIEDUNSPECIFIED
Singh, RMUNSPECIFIEDUNSPECIFIED
Date : 24 October 2013
Identification Number : 10.1016/j.enggeo.2012.11.018
Copyright Disclaimer : © 2013 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords : Capillary break, Desiccation, Flow, Geosynthetics, Interface shear strength, Unsaturated
Depositing User : Symplectic Elements
Date Deposited : 01 Aug 2016 14:24
Last Modified : 01 Aug 2016 14:24
URI: http://epubs.surrey.ac.uk/id/eprint/811576

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