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Comparison of laboratory and in-situ small strain soil stiffness for modelling lateral bearing capacities of XL monopiles

: Pein, Taisiya; Foglia, Aligi; Kayen, Robert; Mörz, Tobias

International Society of Offshore and Polar Engineers -ISOPE-, Goldem/Colo.:
Twenty-Eighth International Ocean and Polar Engineering Conference 2018. Proceedings : Sapporo, Japan, June 10-15, 2018, DVD-ROM
Cupertino, Calif.: ISOPE, 2018
ISBN: 978-1-880653-87-6
International Ocean and Polar Engineering Conference <28, 2018, Sapporo>
Conference Paper
Fraunhofer IWES ()

In this real case study two data sets of small strain shear modulus Gmax from laboratory and in-situ measurements are compared. The two data sets are used as inputs to a linear elastic 3D finite element numerical model to estimate the initial lateral pile-soil stiffness. The question of how much the pile deflection curve depends on the different Gmax derivation methods is discussed throughout the paper. The study reveals a high importance of stratigraphy for this task, and shows that average input stiffness differences up to 20% throughout the profile do not lead to pile deflection changes at the mudline for the discussed regime.