Development of high durable reinforcing method of old embankment for heavy rainfall and earthquake

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04694
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22030:Geotechnical engineering-related
• Research Institution: Kagawa National College of Technology
• Principal Investigator: Aramaki Noritaka 香川高等専門学校, 建設環境工学科, 教授 (00299661)
• Co-Investigator(Kenkyū-buntansha): 向谷 光彦 香川高等専門学校, 創造工学専攻, 教授 (10311094)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 土構造物補強技術 / 人工地盤材料 / 液状化 / 耐震性 / 耐浸食性 / 短繊維 / 力学特性 / 風化

Outline of Final Research Achievements

Recently, a comprehensive range of measures is being implemented with the objective of enhancing the earthquake resistance and heavy rainfall resilience of earthen structures, including reservoir embankments.
The purpose of this study is to develop high toughness geomaterial using crushable soil, approaching from characteristics of both material and structural. A novel soil structure reinforcement technique using this geomaterial is proposed to improve seismic and erosion resistance. As a result, it was observed that the seismic and erosion resistance of the geomaterials decreased due to chemical weathering. The efficacy of short-fiber reinforcement of weathered soil structure was demonstrated even when waste materials were utilized as fiber materials.

Free Research Field

地盤工学

Academic Significance and Societal Importance of the Research Achievements

本課題は，老朽化した土構造物の機能向上を効率的に図るために，構造および地盤材料面から耐震対策および豪雨・洪水対策を同時に解決しようとする技術的取り組みに学術的意義ある。また，土構造物の老朽化プロセスを再現し，長期的な対策効果について検討している。これらを明らかにすることで，簡便で効率的な補強技術，経済的な耐災補強工法の開発へとつながり，新規土構造物の施工だけではなく，その改修にも適用が拡がる。