Pore Pressure During Cone Penetration in Clays

摘要

Deep quasi-static cone penetration provides a superior exploration tool for soil stratification and identification, especially in offshore work. This report utilizes the strain path method to investigate the mechanism of cone penetration in clays with the specific objective of estimating pore pressures in the soil during penetration. Deformations and strains are determined assuming that the soil provides no shearing resistance. Deviatoric stresses and shear-induced pore pressures are determined from specially developed soil behavior models and the strain paths of soil elements. Approximate values of the total stresses and pore pressures in the soil are then computed from equilibrium considerations. An evaluation of the predicted pore pressure fields in Boston Blue Clay are given in the report.