Evaluation of the Remoulded Shear Strength of Offshore Clays and Application to Pipeline-Soil and Riser-Soil Interaction

摘要

Interpretation of field penetrometer tests has made significant advances with the development of full-flow penetrometers of simple cylindrical or spherical geometry. Strain rate dependence of shear strength, and partial softening during the flow of soil around the penetrometer, have been shown to have a significant effect, particularly since strain rates in field tests (both penetration and vane shear tests) are several orders of magnitude higher than a slow laboratory element test. In estimating the remoulded shear strength, consideration must therefore be given to the strain rates during the test, and also the strain rate relevant to the design application.