Development of a temperature and pressure controlled triaxial apparatus and dissociation tests of carbon dioxide hydrate containing soils

• Iwai Hiromasa

  Department of Civil and Earth Resources Engineering, Kyoto University

• Saimyou Kazuki

  JGC Corporation

• Kimoto Sayuri

  Department of Civil and Earth Resources Engineering, Kyoto University

• Oka Fusao

  Kyoto University

抄録

Methane hydrates are viewed as not only a new energy resource but also a trigger of marine geohazard such as large deformations and landslides of seabed ground. Many researcher have showed that methane hydrate containing sand specimens become stronger than that of without hydrates, however, few study have been performed to investigate the mechanical properties subjected to the hydrate dissociation. The main purpose of our study is to investigate behaviors of the deformation associated with dissociation of the hydrates. In this study, we prepared carbon dioxide hydrate containing specimens and conducted a series of dissociation tests using a heating method under undrained conditions. These experiments require the high pressure and the low temperature conditions to form the carbon dioxide, and we have developed a new triaxial apparatus. The dissociation results indicates that even a small percentage of hydrate saturation produced the large pore gas pressure and the sequential reduction of the effective confining pressure due to the hydrate dissociation, and extensive strain was observed.

収録刊行物

• Japanese Geotechnical Society Special Publication

  Japanese Geotechnical Society Special Publication 2 (13), 518-521, 2016

  公益社団法人 地盤工学会

キーワード

• pore water pressure
• pore air pressure
• unsaturated soil

詳細情報

• CRID: 1390282680740751616
• NII論文ID: 130005123864
• DOI: 10.3208/jgssp.jpn-143
• ISSN: 21888027
• Web Site: https://www.jstage.jst.go.jp/article/jgssp/2/13/2_JPN-143/_pdf
• 本文言語コード: en
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