2010 Fiscal Year Final Research Report
Analyses on Mechanism of Large-scale Landslides due to Earthquakes and Proposal of their Countermeasures
| Project/Area Number |
20560458
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | Gunma University |
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Principal Investigator |
UGAI Keizo Gunma University, 大学院・工学研究科, 教授 (60018827)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 地すべり / 地震 / メカニズム / 岩屑なだれ / 数値解析 / 模型実験 / 不撹乱試料土 |
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| Research Abstract |
In order to clarify the mechanisms of large landslides due to earthquakes field investigation, soil sampling, dynamic element tests of undisturbed soils and rocks, model experiments and numerical analyses are carried out. The mechanism of soil slope failures which are often seen in Japan is found to be due to the abrupt reduction of soil shear strength by cyclic shear. The mechanism of weathered rock slope failures is found to be classified into rock avalanche and jointed rock slope failures. Some parts of their mechanism are clarified mainly by model tests.
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