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Laboratory Validation of Ultra-Soft Soil Deformation Model
Abstract Ultra-soft soil with high moisture content will experience large strain deformation under one-dimensional compression with little or no gain in effective stress. Such deformation behaviour does not comply with Terzaghi’s effective stress gain theory. The e-log $$ \sigma_{v}^{\prime } $$ relationship of ultra-soft soil is non-linear with large compression index in the first order of log cycle. This paper proposes three compression indices ($$ C_{c1}^{*} $$, $$ C_{c2}^{*} $$ and $$ C_{c3}^{*} $$) for stresses covering three log cycles. Good prediction of settlement magnitude is possible with these newly proposed compression parameters for ultra-soft soil. In addition, implicit finite difference model applying the large strain theory is also proposed and validated with results from laboratory measurements. The time factor curves for ultra-soft soil with large strain compression are also proposed and validated.
Laboratory Validation of Ultra-Soft Soil Deformation Model
Abstract Ultra-soft soil with high moisture content will experience large strain deformation under one-dimensional compression with little or no gain in effective stress. Such deformation behaviour does not comply with Terzaghi’s effective stress gain theory. The e-log $$ \sigma_{v}^{\prime } $$ relationship of ultra-soft soil is non-linear with large compression index in the first order of log cycle. This paper proposes three compression indices ($$ C_{c1}^{*} $$, $$ C_{c2}^{*} $$ and $$ C_{c3}^{*} $$) for stresses covering three log cycles. Good prediction of settlement magnitude is possible with these newly proposed compression parameters for ultra-soft soil. In addition, implicit finite difference model applying the large strain theory is also proposed and validated with results from laboratory measurements. The time factor curves for ultra-soft soil with large strain compression are also proposed and validated.
Laboratory Validation of Ultra-Soft Soil Deformation Model
Bo, Myint Win (author) / Choa, Victor (author) / Wong, Kai Sin (author) / Arulrajah, Arul (author)
2010
Article (Journal)
English
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