Granular anchors under vertical loading - axial pull

Vinayagamoothy Sivakumar, B.C. O'Kelly, M.R. Madhav, C. Moorhead, Barry Rankin

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Granular anchors are a relatively new concept in ground engineering with relatively little known regarding their load–displacement behaviour, failure modes, ultimate pullout capacity and also potential applications. A granular anchor consists of three main components: a base plate; tendon and compacted granular backfill. The tendon is used to transmit the applied load to the base plate which compresses the granular material to form the anchor. A study of the load–displacement response and ultimate pullout capacity of granular anchors constructed in intact lodgement till and made ground deposits is reported in this paper. Parallel tests were also performed on cast insitu concrete anchors which are traditionally used for anchoring purposes. A new method of analysis for the determination of the ultimate pullout capacity of granular anchors is presented and verified experimentally, with the dominant mode of failure controlled by the column length to diameter ratio. Granular anchors with L/D > 7 principally failed on bulging whereas short granular anchors failed on shaft resistance, with the latter mobilising similar pullout capacities as conventional concrete anchors.
    Original languageEnglish
    Pages (from-to)123-132
    Number of pages10
    JournalCanadian Geotechnical Journal
    Volume50
    Issue number2
    Early online date13 Dec 2012
    DOIs
    Publication statusPublished - 2013

    Keywords

    • Ground improvement, anchors, retaining structures

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

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