2023 Fiscal Year Final Research Report

Development of Lifetime Assessment Method based on Nondestructive Identification of Corrosion Conditions in Steel Sheet Pile Canals

Research Project

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Project/Area Number	21K05825
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 41030:Rural environmental engineering and planning-related
Research Institution	Niigata University
Principal Investigator	Suzuki Tetsuya 新潟大学, 自然科学系, 教授 (30434103)
Co-Investigator(Kenkyū-buntansha)	阿部由麻 (島本由麻) 東京農工大学, (連合)農学研究科(研究院), 助教 (70826601)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	鋼矢板水路 / 腐食劣化 / 非破壊検査 / 機械学習・深層学習 / 寿命評価 / 空間統計モデル
Outline of Final Research Achievements	The steel sheet pile is a construction material made of metal. In the agricultural field, steel sheet piles are widely used as canal revetments in areas with soft soil, but the rapid progression of corrosion has caused a loss of bearing capacity. The rapid progression of corrosion causes pitting corrosion (section loss), which leads to buckling failure. The purpose of this study is to develop a lifetime evaluation method for steel sheet pile revetments for agricultural canals, based on a precise evaluation of the actual corrosion condition, which will contribute to appropriate maintenance measures. The research period is set to three years, from fiscal year 2021 to 2023. Based on these three research subjects, a new lifetime evaluation method for steel sheet pile revetments is developed considering the actual corrosion condition, and a safe and effective conservation measure for agricultural steel sheet pile canals is proposed.
Free Research Field	農業農村工学
Academic Significance and Societal Importance of the Research Achievements	本研究の学術的背景と研究実施の意義は，設置環境の影響を受けて急速に進む鋼矢板護岸の早期劣化実態の解明と保全対策を具体的に考慮した精緻な寿命評価を如何にして実現するかにある。農業農村工学分野では，鋼矢板護岸の長寿命化対策を進めているが，材料科学的観点からの腐食実態の詳細評価やそれに基づく非破壊検査法の確立，寿命評価など，未解決の技術課題が数多く残されている。本申請課題では，腐食実態を考慮した鋼矢板護岸の新たな寿命評価法を開発し，安全かつ効果的な農業用鋼矢板水路の保全対策を提案するものである。