Kyushu University Academic Staff Educational and Research Activities Database
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Motohei Kanayama Last modified date:2024.05.15

Professor / Division of Bioproduction Environmental Sciences
Department of Agro-environmental Sciences
Faculty of Agriculture

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 Reseacher Profiling Tool Kyushu University Pure
Academic Degree
Country of degree conferring institution (Overseas)
Field of Specialization
agricultural engineering
Total Priod of education and research career in the foreign country
Research Interests
  • 1. Soil science and engineering properties of soil as a mechanical material
    2. Prediction and stability evaluation of agricultural soil structures in soft clay ground
    3. Development of environmentally friendly construction technology
    keyword : clay, micro-technology, soft ground, settlement prediction, machine learning, industrial waste, solidification treatment, CO₂ fixed soil
Academic Activities
1. Momoe Takahashi, Motohei Kanayama, Consolidation deformation characteristics of Hachirogata clay with salt leaching, Environmental Earth Sciences,, 82, 338, 1-14, Environmental Earth Sciences volume 82, Article number: 338 (2023), 2023.06, Thick, soft alluvial clay was deposited in the Hachirogata reclaimed area in Akita Prefecture, Japan. The phenomenon of differential settlements of the irrigation structure occurring at the site lowers the function of the water supply to the irrigation channel. In this study, assuming that the differential settlement of the ground is due to salt leaching of the sediments, the effect of leaching on the physical and mechanical properties of Hachirogata clay was examined. It was confirmed that the liquid limit and plasticity index decreased due to the leaching, which indicates that the leached sample changed the flowability due to changes in the water content. From the consolidation tests, it was found that the leached clay had a delay in consolidation deformation, a decrease in permeability, and remarkable creep behaviour. According to the observations of the clay structure by scanning electron microscope, leaching caused the clay particles to change from a random arrangement to an impermeable parallel arrangement, and the resultant pore area increased. These results show that the changes in the clay structure due to leaching affect the physicochemical and mechanical properties such as consistency limits and deformation characteristics. Therefore, it can be inferred that the occurrence of localised leaching is one of the factors that accelerates differential settlement..