Numerical simulation of spudcan penetration into silica sand and prediction of bearing behaviour

T Pucker, Britta Bienen, S. Henke

    Research output: Chapter in Book/Conference paperConference paperpeer-review

    1 Citation (Scopus)

    Abstract

    Prediction of the bearing behavior of vertical loaded shallow foundations is typically done using the classical bearing capacity approach. This approach is very sensitive to the friction angle assumed in the calculation. A conservative estimate of the bearing capacity is required for most applications, hence uncertainties in the friction angle may be absorbed by the safety factor applied. Spudcans are used to found mobile jack-up platforms in the oil and gas industry as well as in the offshore wind energy industry. Contrary to the classical approach, the bearing capacity of spudcans has to be predicted accurately. Spudcans are penetrated into the seabed and a continuous bearing failure proceeds until the target capacity is met. A Coupled Eulerian-Lagrangian (CEL) approach is used to simulate the penetration process of spudcans into silica sand. The sand is modeled using a hypoplastic constitutive model to capture the influence of the void ratio and stress state for example. A parametric study of foundation diameter and enclosed cone angle is presented. The numerical model is validated against results from centrifuge experiments of flat and conical circular footings penetrating into silica sand. A first empirical approach to estimate the bearing capacity depending on the diameter and enclosed cone angle is given for silica sand.
    Original languageEnglish
    Title of host publicationProceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering OMAE2012
    Place of PublicationUSA
    PublisherASME
    Pages47-56
    DOIs
    Publication statusPublished - 2012
    EventASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering - Rio de Janeiro, Brazil
    Duration: 1 Jul 20126 Jul 2012

    Conference

    ConferenceASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
    Country/TerritoryBrazil
    CityRio de Janeiro
    Period1/07/126/07/12

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