Shock absorbing mechanism of soil and countermeasures for expanding the lifespan of rockfall protection works by using soil
| Project/Area Number |
26289152
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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 | Nagoya Institute of Technology |
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Principal Investigator |
Maeda Kenichi 名古屋工業大学, 工学(系)研究科(研究院), 教授 (50271648)
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| Research Collaborator |
USHIWATARI Yuji
YAMAGUCHI Satoru
SAKAKIBARA Junichi
KOBAYASHI Tsuyoshi
KOIKE Yutaka
Muir WOOD David
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Keywords | 応力波 / 密度 / 緩衝 / 衝撃力 / 伝播 / マイクロメカニクス / マルチスケール / 速度以前 / 速度依存 / 地盤防災 / 土砂災害 / 落石 / 個別要素法 / 速度依存性 / 緩衝効果 / 回転 / 粒子形状 |
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| Outline of Final Research Achievements |
Cushioning materials, such as sand cushion and granular mats placed on rock sheds, can effectively disperse and reduce rock fall energy before rocks collide with protection works. Although the construction costs for sedimentary layers are low, these layers are attracting attention as construction devices that can substantially improve the margin of safety ratio. To elucidate the mechanism that governs the impact force waveform of falling mass, this study examines the loading rate dependency of sand cushion by DEM simulation. In the simulation, particular attention is paid to the velocity of stress waves that propagate in sand cushion.
For responding to a wider range of falling rocks impact by absorbing system using soils, we carried out falling-weight impact test against alternating layers absorbing systems. Upper and under layers of alternating layers is composed of sand and middle layer is composed of gravel.
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Report
(4 results)
Research Products
(47 results)
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[Journal Article] 落石衝突による敷砂緩衝材内の変形挙動2015
Author(s)
奥村勇太, 内藤直人, 前田健一, 西弘明, 山口悟, 川瀬良司
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Journal Title
構造工学論文集
Volume: 61A
Pages: 867-875
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] 岩塊転動が構造物に及ぼす影響の評価(1)―異なる形状と大きさを有する大型の岩塊模型と土砂を用いた斜面の転動・流動実験―2014
Author(s)
阿部慶太, 中島進, 渡辺健治, 獅子目修一, 雪岡剛哲, 窪田勇輝, 江原季映, 松浦光佑, 佐々木徹也, 中村英孝, 村田雅明, 中村進, 中瀬仁, 内藤直人, 前田健一
Organizer
第49回地盤工学研究発表会
Place of Presentation
北九州市
Year and Date
2014-07-15 – 2014-07-17
Related Report
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