Construction of landslide scenario and advancement of elastic wave monitoring for slope disaster mitigation
| Project/Area Number |
15H02996
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster / Disaster prevention science
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
土井 一生 京都大学, 防災研究所, 助教 (00572976)
山田 卓 大阪市立大学, 大学院工学研究科, 准教授 (70451789)
後藤 浩之 京都大学, 防災研究所, 准教授 (70452323)
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| Project Period (FY) |
2015-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | 地すべり / 弾性波透過 / 現場モニタリング / 土層試験 / 伝達特性 / 模擬試験 / 弾性波モニタリング / 弾性・非弾性特性 / 地盤工学 / 要素試験 / 弾性波速度 / 地盤災害 / 弾性波 |
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| Outline of Final Research Achievements |
This study has been conducted to establish how to monitor the status of the slope using the elastic waves transmitting under the slope surface where landslide is concerned to occur.
For in situ monitoring, we radiated weak elastic waves over a wide frequency range so that status of slope was not affected. We successfully recorded transmitted waves by high sensitivity accelerometer array observation.
In laboratory, elastic wave measurement transmitting through unconsolidated soil was performed as an element test. An increase in phase velocity with decrease in water head was observed during the drying process of the medium, and this change preceded from lower frequencies.
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| Academic Significance and Societal Importance of the Research Achievements |
地すべりや大規模崩壊等による斜面災害の発生予測は、学術的にも社会的にも重要な課題である。特に、降水に伴う地すべりについては、実際の降水に対して斜面状態を適切に常時モニターすることにより斜面災害の発生予測に役立てることが肝要である。広周波数帯域の弾性波モニタリングは、周波数ごとに感度を持つ領域の広がりが異なるという理論的な裏付けもあり、降水による媒質の湿潤状況の時空間分布の変化を詳細に把握する上で有用であることが、本研究によって示唆された。
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Report
(5 results)
Research Products
(33 results)
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[Journal Article] Shallow subsurface structure estimated from dense aftershock records and microtremor observations in Furukawa district, Miyagi, Japan2017
Author(s)
Goto, H., Mitsunaga, H., Inatani, M., Iiyama, K., Hada, K., Ikeda, T., Takaya, T., Kimura, S., Akiyama, R., Sawada, S., Morikawa, H.
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Journal Title
Exploration Geophysics
Volume: Vol.48, No.1
Issue: 1
Pages: 16-27
DOI
Related Report
Peer Reviewed
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