Abstract
A series of physico-chemical and mechanical tests were performed on the soils sampled from peaty grounds in the suburbs of Iwamizawa city, Hokkaido and Ohmiya city, Saitama, and the geotechnical properties of peats and peaty grounds were investigated. The results of various physico-chemical tests were mainly summarized as a function of organic matter content involved. Also, using the samples of peats and humused chipes, the changes of pore volume and pore size distributions with the one-dimensional compression were investigated with the porosimeter apparatus. From the results of mechanical tests, it was found that the coefficients of secondary compression and permeability of soils were strongly influenced by the amount of organic matter and fibrous peats remarkebly showed anisotropic shear strength.
