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異方正規圧密粘性土の変形特性 Deformation Characteristics of Anisotropically, Normally Consolidated Cohesive Soil Ohmaki, Seiki 大槇, 正紀 オオマキ, セイキ Ohmaki 大槇 オオマキ Seiki 正紀 セイキ metadata only access In this paper, the deformation characteristics of anisotropically, normally consolidated cohesive soil is experimentally studied when it is consolidated and sheared along various stress paths in the region of normal consolidation. Based on these experimental results, a relationship between stress and strain is given in which the effect of the stress history on the deformation behaviour of soil is taken into account. Experimentally the following results are acquired. That is, it is reasonably accepted that the relationship between the ratio of volumetric strain increment to deviatoric one (strain increment ratio) and the ratio of deviator stress to mean effective stress (stress ratio) during shear under constant mean effective stress condition is unique and hardly affected by stress history during anisotropic consolidation before shear. In this case, decrease of volume of the specimen from the beginning of shear to failure is proportional to the change of stress ratio during shear. And when the soil specimen is anisotropically consolidated and sheared under constant mean effective stress to the any specified stress ratio and again consolidated anisotropically under the constant stress ratio, the relationship between stress and strain during the second stage of anisotropic consolidation is influenced by the stress ratio during the first stage of the anisotropic consolidation. Based on the experimental results described above, the relationship of the anisotropically consolidated cohesive soil between the plastic strain increment ratio and the stress ratio are given in both cases of shearing the soil specimen under constant mean effective stress and consolidating it anisotropically under constant stress ratio. Taking these properties into account, a stress-strain relationship is prospoed which explains the the consolidation and shear behaviour of the soil tested along the stress paths in which the stress ratio changes simultaneously with the mean effective stress. It is shown that the analytical results by this relationship corresponds well with the experimental one. 水産工学研究所 National Research Institute of Fisheries Engineering 1981-03 jpn departmental bulletin paper https://fra.repo.nii.ac.jp/records/2007712 nrife_k_2_33 https://agriknowledge.affrc.go.jp/RN/2010234212 日本農学文献記事索引(agriknowledge) AN00332937 0388-9718 水産工学研究所報告 Bulletin of National Research Institute of Fisheries Engineering 2 14 33 46