Modelling the failure modes in geobag revetments

A. Akter, Gareth Pender, Martin Crapper, Grant Wright, W Wong

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    In recent years, sand filled geotextile bags (geobags) have been used as a means of long-term riverbank revetment stabilization. However, despite their deployment in a significant number of locations, the failure modes of such structures are not well understood. Three interactions influence the geobag performance, i.e. geobag-geobag, geobag-water flow and geobag-water flow-river bank. The aim of the research reported here is to develop a detailed understanding of the failure mechanisms in a geobag revetment using a discrete element model (DEM) validated by laboratory data. The laboratory measured velocity data were used for preparing a mapped velocity field for a coupled DEM simulation of geobag revetment failure. The validated DEM model could identify well the critical bag location in varying water depths. Toe scour, one of the major instability factors in revetments, and its influence on the bottom-most layer of the bags were also reasonably represented in this DEM model. It is envisaged that the use of a DEM model will provide more details on geobag revetment performance in riverbanks.
    Original languageEnglish
    Pages (from-to)418-425
    JournalWater Science and Technology
    Volume65
    Issue number3
    DOIs
    Publication statusPublished - 2012

    Keywords

    • DEM
    • failure modes
    • geobags

    Fingerprint Dive into the research topics of 'Modelling the failure modes in geobag revetments'. Together they form a unique fingerprint.

    Cite this