2011 Fiscal Year Final Research Report
Evaluation of Stability of Shallow Type Gas Hydrate-Bearing Grounds and Global Change
| Project/Area Number |
21360219
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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 |
Geotechnical engineering
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
HACHIKUBO Akihiro 北見工業大学, 工学部, 准教授 (50312450)
KAWAGUCHI Takayuki 北見工業大学, 工学部, 准教授 (20310964)
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| Co-Investigator(Renkei-kenkyūsha) |
SHOJI Hitoshi 北見工業大学, 工学部, 教授 (50201562)
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| Research Collaborator |
KATAOKA Satsuki 函館工業高等専門学校, 助教 (50552080)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 海底・湖底堆積土 / ガスハイドレート / 試料の乱れ / 溶存ガス / 応力解放 |
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| Research Abstract |
Core samplings were conducted from sea bottom grounds, where shallow gas hydrates existed. Some kinds of mechanical tests were performed for the core samples on board. To evaluate the sample quality, the relations between the concentration of dissolved gas and the strength were also examined. Moreover, laboratory tests which simulate the stress relief during the sampling were also performed. Test results showed that the strength of soils become lower with the increase of gas saturation on both on-board and laboratory tests. It was also showed that the in-situ strength can be estimated roughly from the disturbed sample.
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[Journal Article] Strength change of seabed soils due to the vaporization of dissolved gas in the pore water2011
Author(s)
Yamashita, S., Moriwaki, T., Hachikubo, A., Minami, H., Shoji, H., Kawaguchi, T. Kataoka, S.
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Journal Title
Proc. of 4th Inter. Symp. on Deformation Characteristics of Geomaterials
Volume: Vol.2
Pages: 905-910
Peer Reviewed
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[Journal Article] Molecular and isotopic characteristics of gas hydrate-bound hydrocarbons in southern and central Lake Baikal2010
Author(s)
Hachikubo, A., Khlystov, O., Krylov, A, Sakagami, H., Minami, H., Yutaka Nunokawa, Yamashita, S., Takahashi, N., Shoji, H., Nishio, S., Kida, M., Ebinuma, T., Kalmychkov, G. and Poort, J.
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Journal Title
Geo-Marine Letters
Volume: Vol.30
Pages: 321-329
DOI
Peer Reviewed
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