Unloading Test with Remolded Marine Soil Sample and Disturbance Degree Assessment

Abstract

Field sampling of seabed soil is characterized by release of original high stress field, this study carries out indoor tests to investigate the properties of disturbed soil sample. Firstly remold the initial pressure conditions of sea soil with GDS tri-axial apparatus for high pressure test, and then conduct isobaric unloading test by steadily releasing confining pressure and back pressure, finally study the relationship of volumetric stress and drainage volumetric strain during unloading with different initial pressures. For assessing the disturbance properties in test, this study develops a soil disturbance indicator related to the parameter volumetric module, and provides the corresponding result for reference in further study.