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    Volume 40, Issue 2 (March 2017)

    Simple Method to Measure the Long-Term Load Change of Ground Anchors

    (Received 25 May 2016; accepted 15 November 2016)

    Published Online: 2017

    CODEN: GTJODJ

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    Abstract

    This paper introduces a simple and reliable method for measuring the long-term load changes of ground anchors. The method operates in a similar fashion to that of the tell-tale load cell in principle. However, in contrast to the tell-tale load cell, the proposed method is highly durable and inexpensive. It only requires the components used in a typical anchor assembly and consists of only one extra strand as the reference strand, which is not engaged by the anchorage. For this method, when the anchor-load changes, the anchorage moves and a relative deformation between the reference strand and anchorage is generated. Based on the measured relative deformation and the effective free-strand length, the change in anchor load can be approximately calculated. The suitability of this method was confirmed by stressing tests performed on field anchors. Although its accuracy may not be as high as that of electrical load cells, it is still satisfactory for evaluating the long-term stability of anchored slopes.


    Author Information:

    Liao, H. -J.
    Dept. of Civil and Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei City,

    Cheng, S. -H.
    Taiwan Building Technology Center, National Taiwan Univ. of Science and Technology, Taipei City,

    Chen, H. -R.
    Dept. of Civil and Construction Engineering, National Taiwan Univ. of Science and Technology, Taipei City,

    Chen, C. -C.
    Good Earth Engineering Corp., Taipei,


    Stock #: GTJ20160110

    ISSN:0149-6115

    DOI: 10.1520/GTJ20160110

    Author
    Title Simple Method to Measure the Long-Term Load Change of Ground Anchors
    Symposium ,
    Committee A01