ABSTRACT
The assessment of shallow CPT results is of particular importance for shallow foundations for offshore structures such as suction caissons, Gravity Based Structures (GBS), etc. Estimation of the relative density is crucial for the assessment of strength and stiffness parameters, not the least, reconstitution of sand for laboratory testing at in-situ conditions. This study aims to provide insight into shallow CPT behaviour, i.e. clarifying the development of failure mechanisms by utilizing Finite Element (FE) analysis adopting idealized soil profiles to understand the observed CPT behaviour at shallow depths. Hence, the work focuses on reproducing the stress and density dependent CPT resistance and by that correlating unique features of measurements to particular soil states. The Arbitrary Lagrangian-Eulerian (ALE) and Coupled Eulerian-Lagrangian (CEL) methods are employed to better capture the large deformation mechanism of the soil. The sand behaviour (i.e. state dependent strength, stiffness, and deformation behaviour) is modelled using the hypoplasticity.
