Evaluation of earth structure deterioration due to internal erosion
| Project/Area Number |
26289151
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Kuwano Reiko 東京大学, 生産技術研究所, 教授 (80312974)
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| Co-Investigator(Kenkyū-buntansha) |
村上 章 京都大学, (連合)農学研究科(研究院), 教授 (80157742)
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| Co-Investigator(Renkei-kenkyūsha) |
MIZUTANI Takaaki (国研)港湾空港技術研究所, 地盤研究領域, チームリーダー (70371763)
MORI Hirotoshi 山口大学, 創成科学研究科, 准教授 (20355803)
KUWANO Jiro 埼玉大学, 大学院理工学研究科, 教授 (30178149)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Keywords | 土構造物 / 内部侵食 / 劣化 / 水みち / 陥没 / 老朽化 / 空洞 / 地盤工学 / 細粒分流出 |
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| Outline of Final Research Achievements |
Field investigation and laboratory tests were conducted to study the mechanism of formation/expansion of subsurface cavities and water pathways in the ground.
It was possible to clarify the cause of sinkholes occured in the real cases, such as multiple sinkholes in Pokhara, Napal and a large scale sinkhole in Miyakonojo, Miyazaki. But it was not possible to detect the water pathway or underground cavities at more than two meter deep, with non-destructive manner. From laboratory tests, stiffness and strength reduction of soil due to suffusion could be quatitatively evaluated to some extent.
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Report
(5 results)
Research Products
(43 results)
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[Presentation] Investigation into the multiple recent sinkholes in Pokhara, Nepal2016
Author(s)
Kuwano,R., Pokhrel,R.M., Kiyota,T., Katagiri, T., Yagiura,Y., Ikeda,T. and Kuwano,J.
Organizer
the 8th International Conference on Scour and Erosion
Place of Presentation
Oxford （UK）
Year and Date
2016-09-12
Related Report
Int'l Joint Research
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[Presentation] Follow-up Survey of Sinkhole Damage in Pokhara, Nepal -Riverbed Lowering and Subsequent Groundwater Lowering Causing Numerous Sinkholes in Pokhara, Nepal Since 20132016
Author(s)
Yagiura,Y., Takemasa,M., Yoshikawa,T., Kiyota,T., Kuwano,R., Katagiri,T., Ikeda,T. and Pokhrel,R.M.
Organizer
the7th Japan-Taiwan Workshop on Geotechnical Hazard from Large Earthquake and Heavy Rainfall
Place of Presentation
台北（台湾）
Related Report
Int'l Joint Research
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