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    Volume 42, Issue 6 (November 2019)

    Measuring Six-Degree-of-Freedom Movements of Buried Objects in Soil Using a Magnetometer

    (Received 16 September 2017; accepted 17 September 2018)

    Published Online: 05 December 2018

    CODEN: GTJODJ

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    Abstract

    Measuring the six-degree-of-freedom movement of objects in soil can provide valuable information about geotechnical performance. Existing technology for monitoring six-degree-of-freedom movements can be cumbersome because it typically relies on a combination of multiple devices that each measure one or two degrees of freedom. A magnetometer is an innovative piece of technology to measure the entire six-degree-of-freedom movement of an object in soil in real time. The equipment consists of a source that generates an electromagnetic field and one or more sensors that can detect their location and orientation versus time based on the characteristics they sense about this field. A commercially available magnetometer with a maximum distance of 1.5 m between the sensor and source has been used to conduct a variety of laboratory tests on scaled models of offshore anchors that move through soil when loaded. These tests demonstrate the versatility and potential of using magnetometers to monitor the performance of foundations, retention systems, pipelines, and slopes.

    Author Information:

    Gerkus, Hande
    Freese and Nichols, Inc., Austin, TX

    Lai, Ying
    College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang

    Senanayake, Asitha
    Fugro USA Marine Inc., Norfolk, VA

    Gilbert, Robert B.
    Department of Civil Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX

    Huang, Yunhan
    Department of Civil Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX

    Giampa, Joseph R.
    GEI Consultants, Inc., Woburn, MA

    Bradshaw, Aaron S.
    Department of Civil and Environmental Engineering, Kingson, RI


    Stock #: GTJ20170328

    ISSN:0149-6115

    DOI: 10.1520/GTJ20170328

    Author
    Title Measuring Six-Degree-of-Freedom Movements of Buried Objects in Soil Using a Magnetometer
    Symposium ,
    Committee D18