Evaluation of Stability of Shallow Type Gas Hydrate-Bearing Grounds and Global Change

浅层天然气水合物地层稳定性评价与全球变化

• 批准号: 21360219
• 负责人: YAMASHITA Satoshi
• 金额: $ 11.48万
• 依托单位: Kitami Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21360219/
• 关键词: 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; 海洋資源; 環境変動; 地盤工学; 物性試験; メタンハイドレート; 斜面安定; 環境恋動

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.

岩心取样取自存在浅层天然气水合物的海底。对船上的岩心试件进行了各种力学试验。为了评价样品的质量，还考察了溶解气体浓度与强度的关系。此外，还进行了模拟取样过程中应力释放的实验室试验。车载试验和室内试验结果表明，随着含气饱和度的增加，土体强度降低。试验还表明，从扰动试件中可以粗略地估算出现场强度。

项目成果

溶存ガスの気化に伴う海底堆積土の強度変化

由于溶解气体的蒸发而导致海底沉积物强度的变化

• 发表时间: 2010
• 作者: Murakami;T.;Yoshino;J.;Yasuda;T.;Iizuka S. and Shimokawa S.;T. Okamoto and M. Okamura;吉田惇・有働恵子・真野明;八木綾子,有場次郎,稲垣厚至,神田学,藤原忠誠,藤吉康志;宮田喜壽,篠田昌弘,小浪岳治,大野孝二,米澤豊司,弘中淳市;小川美穂
• 通讯作者: 小川美穂

Soil properties of the shallow type methane hydrate-bearing sediments in the Lake Baikal.

• 发表时间: 2009
• 作者: S. Kataoka;S. Yamashita;Teruyuki Suzuki;T. Kawaguchi;M. Hamza;M. Shahien;Y. El-Mossallamy

塩分濃度の違いが土の強度やせん断弾性係数に与える影響

盐度差异对土体强度和剪切模量的影响

• 发表时间: 2010
• 作者: 武若聡;エルサイドガラル;趙卓維;菊池練人
• 通讯作者: 菊池練人

Geochemistry of pore waters from LV47 and LV50 gas hydrate-bearing sediment cores retrieved at the northeastern continental slope off Sakhalin Island, Sea of Okhotsk

鄂霍次克海萨哈林岛东北部大陆坡取回的 LV47 和 LV50 含天然气水合物沉积物岩心孔隙水的地球化学

• 发表时间: 2011
• 作者: Minami;H.
• 通讯作者: H.

Heterogeneous molecular composition of hydrate-bound gas in subsurface sediments from offshore Sakhalin Island, Sea of Okhotsk

鄂霍次克海萨哈林岛近海地下沉积物中水合物结合气体的异质分子组成

• 发表时间: 2010
• 作者: 丹生和宏;西藤潤;田村武;Akihiro Hachikubo
• 通讯作者: Akihiro Hachikubo