Settlement-induced bending moments on pile-founded floodwalls

Panagiota Kokkali, Anthony Tessari, Tarek Abdoun, Richard Varuso, Jehu Johnson, George Filz, Alexander Reeb

    Research output: Contribution to journalArticle

    Abstract

    T-walls are pile-supported floodwalls commonly built in New Orleans. They are founded on long concrete or steel battered piles and include a sheet pile cut off for seepage and gradient control. Since soils in southern Louisiana contain soft and compressible silt and clay, these floodwalls need to be designed to resist flood loads and loads produced by consolidation of soft soil under the weight of new fill. In an attempt to develop a comprehensive T-wall design procedure that appropriately considers field conditions, the United States Army Corps of Engineers New Orleans District partnered with Rensselaer Polytechnic Institute and Virginia Polytechnic Institute and State University. A testing programme was developed to perform centrifuge tests that would provide insight into the mechanisms and magnitudes of settlement-induced bending moments and reliable datasets for validation of numerical models. This paper describes the experimental approach and presents two centrifuge tests with T-walls resting directly on clay. The bending moments on the battered piles significantly increased under the weight of the new fill. With settlement around the piles reaching values of 1·5 m, the bending moments at least doubled over the testing course, with maximum values observed at the top third of the pile length.

    Original languageEnglish (US)
    Pages (from-to)2-20
    Number of pages19
    JournalInternational Journal of Physical Modelling in Geotechnics
    Volume18
    Issue number1
    DOIs
    StatePublished - Jan 1 2018

    Fingerprint

    Bending moments
    Piles
    pile
    Centrifuges
    centrifuge
    Clay
    fill
    Soils
    clay
    Silt
    Testing
    Seepage
    soft soil
    Consolidation
    seepage
    consolidation
    Numerical models
    silt
    steel
    Concretes

    Keywords

    • embankments
    • models (physical)
    • piles & piling

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

    Cite this

    Settlement-induced bending moments on pile-founded floodwalls. / Kokkali, Panagiota; Tessari, Anthony; Abdoun, Tarek; Varuso, Richard; Johnson, Jehu; Filz, George; Reeb, Alexander.

    In: International Journal of Physical Modelling in Geotechnics, Vol. 18, No. 1, 01.01.2018, p. 2-20.

    Research output: Contribution to journalArticle

    Kokkali, Panagiota ; Tessari, Anthony ; Abdoun, Tarek ; Varuso, Richard ; Johnson, Jehu ; Filz, George ; Reeb, Alexander. / Settlement-induced bending moments on pile-founded floodwalls. In: International Journal of Physical Modelling in Geotechnics. 2018 ; Vol. 18, No. 1. pp. 2-20.
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