chapter  64
Pore pressure measurements using a portable free fall penetrometer
ByM.B. Mumtaz, N. Stark, S. Brizzolara
Pages 7

Pore pressure measurements during penetrometer deployments can complement measurements of strength resistance, and provide additional information about the soil. However, for high-velocity impacts, hydrodynamic forces lead to complex pressure recordings during the free fall and penetration. To investigate these effects, a Computational Fluid Dynamics model (CFD) has been developed. Based on initial results from the CFD model, a quasi-steady approach based on a velocity-dependent correlation is proposed to correct for dynamic effects and shape dependent pressure gradients acting on the FFP, and thus, also on the pore pressure readings. Finally, the results are discussed with regard to opportunities for future research.