2021 Fiscal Year Final Research Report
Development of bio-alarm utilizing vegetation bio-electric potentials detecting surface failure
| Project/Area Number |
19K15089
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 22030:Geotechnical engineering-related
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 植生生体電位 / 表層崩壊 / 一面せん断試験 |
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| Outline of Final Research Achievements |
A study was conducted to develop a "surface failure bio-alarm" for early detection of landslides by monitoring the bio-potential of vegetation on slopes where landslides may occur due to heavy rainfall or earthquakes.The results of box shear tests and shaking tests for model slope with vegetation were conducted to quantify the relationship between soil strength and shear-stimulated bio-electric potential fluctuations during soil shear (= landslide). From these studies and analysis, a method to estimate the shear strength of the ground from the variation of the bio-electric potential was developed.
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| Free Research Field |
地盤工学，防災地盤工学，環境地盤工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で開発した「表層崩壊バイオアラーム」は，将来的に山間地の植生に適用し，植生に設置された電位の変動をモニタリングすることで，自然の力 (植生のバイオセンサー機能) を活かして早期警報を発令し，斜面災害，特に表層崩壊による人的被害を軽減できる画期的な手法となり得る．加えて，「土のせん断強さの評価」という地盤工学的な観点と，「刺激による植生のバイオリズムの変動」といった植物生理学的観点を融合し，革新的な知見を見出したことが，本研究課題の学術的意義および新規性といえる．
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