Abstract
K0-consolidation tests using the triaxal testing apparatus on undisturbed peat and organic clay were conducted and in situ tests by the flat dilatometer were performed on peaty soft ground in Hokkaido, to investigate the coefficient of earth pressure at rest of these soils.
This study has revealed that the K0-value of normally consolidated peat and organic clay decreases with an increase in their ignition loss. The K0-value of over consolidated peat and organic clay depends strongly on OCR as compared with mineral clay and then “m”value increases with their ignition loss. In case of estimation of K0-value using the flat dilatometer, the equation proposed by Iwasaki has relatively applicability for peaty soft ground.
