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    Volume 42, Issue 5 (September 2019)

    Full-Match Method to Determine the Coefficient of Radial Consolidation

    (Received 17 April 2017; accepted 11 July 2018)

    Published Online: 2018

    CODEN: GTJODJ

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    Abstract

    This study presents a novel approach to determine the coefficient of consolidation (ch), which represents the complete behavior of primary consolidation while instantaneously loading consolidation tests with central drainage (CD) and peripheral drainage (PD). The entire consolidation range (i.e., ultimate settlement δult) was graphically determined using settlement rate variations, and then ch was obtained by best fitting such data range with 2-D theoretical solutions. The proposed method and 11 existing methods were applied to 15 existing test data. The applicability of the estimated δult and ch values was verified via back analysis. Results indicate that the errors between the back-analyzed and measured settlements are within a maximum of 7 % in the case of the proposed method but within a maximum of over 50 % in the case of existing methods. Thus, the ch values obtained using existing methods on the CD and PD test results varied within the range of 60–120 % and 50–70 %, respectively, of those of the proposed method. Such substantial underestimation or overestimation was mainly attributed to the variations between the theoretical and experimental time–settlement relationships, incorrectly determined δult, and limitations in graphical procedures.

    Author Information:

    Chung, S. G.
    Department of Civil Engineering, Dong-A University, Nakdong-ro, Busan

    Park, T. R.
    Department of Civil Engineering, Dong-A University, Nakdong-ro 550, Busan

    Hwang, D. Y.
    Department of Civil Engineering, Dong-A University, Nakdong-ro 550, Busan

    Kweon, H. J.
    Institute for Urban Planning and Construction Technology, Dong-A University, Nakdong-ro 550, Busan


    Stock #: GTJ20170459

    ISSN:0149-6115

    DOI: 10.1520/GTJ20170459

    Author
    Title Full-Match Method to Determine the Coefficient of Radial Consolidation
    Symposium ,
    Committee D18