CEDA Dredging Days 2019

Dredging Days

Unstable behaviour of a sand cap placed over a weak sensitive clay deposit

7-8 November 2019. Ahoy, Rotterdam, the Netherlands

Martinelli M, Luger D, Talmon A and Galavi V - Deltares, the Netherlands

Summary: This presentation will illustrate the most recent simulations of sand capping. A strain softening and rate dependent constitutive model was used to simulate the mud behaviour and sand cap plunging, as observed in the field, was reproduced by numerical analysis. The paper will discuss the study and its conclusions.

26.martinelli_pdimage.jpg (44 K)
Failure of the weak tailing deposit during sand capping process

  • Triggering and the evolution of the failure process of tailing deposits are numerically simulated with the material point method, from small to very large strain ranges
  • Rate effects are included to simulate undrained viscous and sensitive response of soft tailing deposits
  • The combination of MPM and the constitutive model provides an overlap with computational fluid dynamics tools that are currently being used to analyse flow and deposition of fluid muds

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Last update: 6 September 2019