Influence of features of natural soft clay on behaviour of embankment |
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Authors: | Zhen-yu Yin M Karstunen Jian-hua Wang and Chuang Yu |
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Affiliation: | (1) Department of Civil and Structural Engineering, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia |
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Abstract: | The influence of different features of natural soft clays, namely anisotropy, destructuration and viscosity, on modelling
the time-dependent behaviour of Murro embankment was investigated. The newly developed elasto-viscoplastic models were enhanced
for determining viscosity parameters in a straightforward way and adopted for the finite element analysis. The same set of
common parameters determined from conventional triaxial and oedometer tests was employed for all models, with additional parameters
required for representing different soil features. The finite element predictions by using models coupled with BIOT’s consolidation
theory were compared with each other and with field data for settlement, horizontal displacement and excess pore pressures.
In addition, the stress paths under the embankment loading were also compared with each other to improve the understanding
of the effect of different soil features. All simulations demonstrate that all three features significantly influence the
predictions. As a consequence, accounting for soil features needs to be carefully considered when they are applied to a construction
site. |
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Keywords: | viscosity anisotropy destructuration soft clay embankment viscoplasticity |
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