Interpretation of the Torsional Resistance of Shallowly Embedded Hemiball Penetrometer

Abstract

The hemiball penetrometer is a geotechnical device developed to measure the property of surficial seabed sediments (<0.5 m), which is of most significance for pipeline design and for situations in which traditional site investigation methods face challenges in accurately characterizing the soil properties. This study developed a novel method to derive the axial frictional resistance along the pipeline through a simple scaling relationship from the torsional resistance measured by the hemiball penetrometer in situ. To achieve this, the undrained and drained torsional resistances of the hemiball for idealized conditions were theoretically explored using the plasticity theory and principles of ..