Integration of structure-fluid-fluxcodel for subsurface geo enginnering

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15094
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 22030:Geotechnical engineering-related
• Research Institution: Tokyo University of Marine Science and Technology (2021); Japan Agency for Marine-Earth Science and Technology (2019-2020)
• Principal Investigator: Nomura Shun 東京海洋大学, 学術研究院, 准教授 (20705701)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 海洋地盤 / 数値解析 / 室内試験 / 混合体材料

Outline of Final Research Achievements

The seafloor ground always exists at the boundary between the seafloor and the crust, and the occupancy rate is not large on a global scale. However, it is an area where various physicochemical phenomena are observed as well other global boundaries. To elucidate the earth dynamics and promote understanding the area where great expectations are placed on its industrial use, the "soil -fluid-thermochemical coupling model" that can evaluate the spatio-temporal ground condition accompanied by special environmental changes has been developed.
In the research process, I mainly tackled on (1) the deformation stability problem on the ground, (2) the fluid infiltration and material transport problem, and (3) the theoretical integration of the developed theory with the heat transportation process.

Free Research Field

地盤工学

Academic Significance and Societal Importance of the Research Achievements

海底地盤の力学現象を把握するには土/水/空気で構成される多相混合体である地盤の力学体系を正記す必要がある。また，地盤中の熱や溶解物質が地盤内を運動する際，温度，圧力，濃度といった逐次変化する環境因子の中でそれらがどのように領域に伝播し波及していくか理論的に説明する必要がある。本研究では主に数理理論の構築に主眼を置き、質量保存則，混合体理論といった物理法則の根幹となる理論から理論体系の整理を行った。
併せて、海洋構造物と地盤材料の境界における相互作用の理解を進めるための観察手法の構築が進み要素情報計測のための基盤技術が整った。