2017 Fiscal Year Final Research Report
Damage estimation of approach part of abutment on the soft ground due to earthquake and its countermeasures
| Project/Area Number |
15K06182
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
玉井 宏樹 九州大学, 工学研究院, 助教 (20509632)
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| Co-Investigator(Renkei-kenkyūsha) |
UNO Kunihiko 五洋建設株式会社(技術研究所), 耐震構造チーム, 主任研究員 (10600372)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 液状化 / 有効応力解析 / 橋台 / 荷重低減工法 / 深層混合処理工法 |
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| Outline of Final Research Achievements |
Damage estimation of the rear approaching part of the abutment during the earthquake was performed by effective stress analysis. Analysis revealed that the presence of the liquefaction layer caused the ground to flow and subsidence of the backside approach part of the abutment. It was also found that the bending moment acting on the pile foundation increases under the liquefaction layer. In order to suppress settlement of the approaching part of the abutment, two types of soil improvement methods, load reduction method and deep mixing processing method were taken and effective stress analysis was conducted. As a result, both methods could suppress settlement of the back approach part. However, the bending moment of the pile foundation was not so much reduced.
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| Free Research Field |
地震工学
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