Adaptation of a constitutive model for sand to account for non-plastic fines
Adaptation of a constitutive model for sand to account for non-plastic fines
With the continued development of offshore wind farms in the North Sea it is apparent that seabed sand layers often incorporate a significant fines content within the sand grain skeleton. The presence of fines can alter the mechanical behaviour of the soil from the ‘clean sand’ case. When modelling sand with fines it is common industry practice to employ constitutive models for clean sand, either by re-calibrating the models to account for the presence of fines or by disregarding the influence of fines. This paper describes modifications to an existing constitutive model for sand, ‘Ta-Ger’, so that it is able to predict the behaviour of sand with a range of fines contents, fc. The influence of the fines is addressed via equivalent granular state theory (EGST). The resulting model is shown to capture the effects of initial void ratio and stress level as well as being able to account for a varying fines content. Comparisons with some available test data are described.
Dimitrios Konstantinidis; C. M. Martin; H. J. Burd
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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