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  • Modelling ground response for deep excavation in soft ground

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    Author(s)
    Yong, Choo C
    Oh, Erwin
    Griffith University Author(s)
    Oh, Erwin
    Year published
    2016
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    Abstract
    Due to its simplicity in use and input parameters can be straightforwardly determined (from in-situ tests, laboratory tests and empirical correlations), linear elastic perfectly-plastic Mohr-Coulomb (MC) model remains a favourite constitutive modelling choice to Geotechnical engineers. Non-linear Hardening Soil (HS) model is an improvement of MC model. It is not commonly used mainly due to lack of appropriate non-linear drained stiffness parameters from laboratory tests and field calibrations. Using a deep excavation project as a case study, this paper presents a comparison of MC and HS models in assessing wall deflection. The ...
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    Due to its simplicity in use and input parameters can be straightforwardly determined (from in-situ tests, laboratory tests and empirical correlations), linear elastic perfectly-plastic Mohr-Coulomb (MC) model remains a favourite constitutive modelling choice to Geotechnical engineers. Non-linear Hardening Soil (HS) model is an improvement of MC model. It is not commonly used mainly due to lack of appropriate non-linear drained stiffness parameters from laboratory tests and field calibrations. Using a deep excavation project as a case study, this paper presents a comparison of MC and HS models in assessing wall deflection. The numerical models are established based on soil parameters interpreted from available soil investigation. It was found from back analysis of a case history that laboratory tests and empirical correlations grossly underestimated the drained stiffness parameters. In order to close the gaps between predicted and observed deflections, the drained stiffness parameters have to be increased by six-fold and more than eight-fold for MC Model and HS Model, respectively.
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    Journal Title
    International Journal of GEOMATE
    Volume
    11
    Issue
    26
    Publisher URI
    http://www.geomatejournal.com/articles/2016/11/26
    Copyright Statement
    © 2016 GEOMATE International Society. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Civil engineering
    Civil geotechnical engineering
    Publication URI
    http://hdl.handle.net/10072/100055
    Collection
    • Journal articles

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