Predicting the hydrodynamic forces on geobag revetments

Akter, Aysha, Pender, Garry, Wright, Grant and Crapper, Martin (2011) Predicting the hydrodynamic forces on geobag revetments. Journal of Flood Risk Management, 4 (4). pp. 328-338. ISSN 1753-318X

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Official URL: http://dx.doi.org/10.1111/j.1753-318X.2011.01117.x

Abstract

Sand-filled geotextile bags (geobags) are commonly used for riverbank protection, however, despite their deployment in a significant number of locations, the failure modes of such structures are not well understood. This paper describes a series of 1:10 physical model tests designed to improve our understanding of the basic failure modes of geobag revetments used as river bank protection. In particular, the aim of the experimental programme is to quantify the relationship between hydraulic shear stress on the revetment surface and geobag displacement. The aspect of the work reported is the use of two analytical techniques, the Conveyance Estimation System (CES) and the membrane analogy method developed by Chow to predict hydraulic shear stress on the geobag surface. It is concluded that both methods produce acceptable shear stress predictions for the initially washed away bags, although the CES is recommended for future use because of its better prediction and ease of application.

Item Type: Article
Uncontrolled Keywords: Conveyance Estimation System; failure modes; geobag; hydrodynamic forces; shear stress
Subjects: H200 Civil Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 07 Jun 2016 12:40
Last Modified: 02 Feb 2017 14:06
URI: http://nrl.northumbria.ac.uk/id/eprint/27032

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