Installation of dynamically embedded plate anchors as assessed through field tests

Anthony Blake, Conleth O’loughlin

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)

    Abstract

    © 2015, National Research Council of Canada, All Rights Reserved. A dynamically embedded plate anchor (DEPLA) is a rocket-shaped anchor that comprises a removable central shaft and a set of four flukes. The DEPLA penetrates to a target depth in the seabed by the kinetic energy obtained through free-fall in water. After embedment the central shaft is retrieved leaving the anchor flukes vertically embedded in the seabed. The flukes constitute the load-bearing element as a plate anchor. This paper focuses on the dynamic installation of the DEPLA. Net resistance and velocity profiles are derived from acceleration data measured by an inertial measurement unit during DEPLA field tests, which are compared with corresponding theoretical profiles based on strain rate-enhanced shear resistance and fluid mechanics drag resistance. Comparison of the measured net resistance force profiles with the model predictions shows fair agreement at 1:12 scale and good agreement at 1:7.2 and 1:4.5 scales. For all scales the embedment model predicts the final anchor embedment depth to a high degree of accuracy.
    Original languageEnglish
    Pages (from-to)1270-1282
    JournalCanadian Geotechnical Journal
    Volume52
    Issue number9
    Early online date30 Jan 2015
    DOIs
    Publication statusPublished - Sep 2015

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