著者

三浦 竜司 山下 聡 南 尚嗣 八久保 晶弘 坂上 寛敏 松本 良 庄子 仁 高橋 信夫 Young K Jin Anatoly Obzhirov Oleg Khlystov MIURA Ryuji YAMASHITA Satoshi MINAMI Hirotsugu HATIKUBO Akihiro SAKAGAMI Hirotoshi MATSUMOTO Ryo SHOJI Hitoshi TAKAHASHI Nobuo

出版者

公益社団法人 地盤工学会 北海道支部

雑誌

地盤工学会北海道支部技術報告集

巻号頁・発行日

no.53, pp.49-58, 2013-01

著者

庄子 仁 JIN Young K OBZHIROV Anatoly SALOMATIN Alexander BARANOV Boris GLADYSH Vyacheslav 八久保 晶弘 南 尚嗣 山下 聡 高橋 信夫 SHOJI Hitoshi HACHIKUBO Akihiro MINAMI Hirotsugu YAMASHITA Satoshi TAKAHASHI Nobuo

出版者

東京地学協会

雑誌

地學雜誌

巻号頁・発行日

vol.118, no.1, pp.175-193, 2009-03

被引用文献数

10

著者

庄子 仁 Jin Young K. Obzhirov Anatoly SALOMATIN Alexander BARANOV Boris GLADYSH Vyacheslav 八久保 晶弘 南 尚嗣 山下 総 高橋 信夫

出版者

Tokyo Geographical Society

雑誌

地學雜誌 (ISSN:0022135X)

巻号頁・発行日

vol.118, no.1, pp.175-193, 2009-03-25

参考文献数

35

被引用文献数

5 10

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Methane hydrates exist beneath the sea bottom near cold seeps NE off the Sakhalin in the Sea of Okhotsk. Multidisciplinary field operations were performed at a study area (approximately 16 × 20 km²) to investigate seepage characteristics and understand gas hydrate formation mechanisms. A continuous profiling survey was conducted to obtain a distribution map of seepage structures on the floor by using a deep-tow, side-scan-sonar equipment. The distribution map reveals that the dense area of seepage structures coincides with a sea-floor area of deformed sediments caused possibly by repeated sediment slumping and debris flows in the past. We speculate that this deformation may have created shallow faults that are suitable to conduits for the migration and discharge of gas and fluid.<br> Three seepage structures were selected to study about their fluid-seep conditions around the sea floor level. Hieroglyph seepage structure is located at the northern end of the dense area of the structures. Kitami and Chaos structures are located about 2 and 7 km respectively apart from the Hieroglyph structure within the dense area. Large plumes on echograms and higher methane contents in the water column confirm gas seepage activities at the three structures. There observed at least two and four plumes at the Hieroglyph and Chaos structures, respectively. Each gas chimney image in seismic reflection profiles was traced to connect each BSR and seepage structure. Both pull-up and disturbed structures of BSR around the gas chimney images were interpreted as to be indications of significant heat flows caused by ascending fluid at both Kitami and Chaos structures. On the other hand, almost no pull-up/disturbance of BSR was observed at the Hieroglyph structure, suggesting little water seepage.<br> The seep activity may vary with time off the Sakhalin. The Hieroglyph structure is located at the edge of a dense area of the seepage structures. It might serve as an indicator for the long-term activity of the fluid seepage system off the Sakhalin.

著者

庄子 仁 Young K. JIN Anatoly OBZHIROV Alexander SALOMATIN Boris BARANOV Vyacheslav GLADYSH 八久保 晶弘 南 尚嗣 山下 聡 高橋 信夫

出版者

公益社団法人 東京地学協会

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.118, no.1, pp.175-193, 2009-02-25 (Released:2010-04-05)

参考文献数

35

被引用文献数

10 10

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Methane hydrates exist beneath the sea bottom near cold seeps NE off the Sakhalin in the Sea of Okhotsk. Multidisciplinary field operations were performed at a study area (approximately 16 × 20 km2) to investigate seepage characteristics and understand gas hydrate formation mechanisms. A continuous profiling survey was conducted to obtain a distribution map of seepage structures on the floor by using a deep-tow, side-scan-sonar equipment. The distribution map reveals that the dense area of seepage structures coincides with a sea-floor area of deformed sediments caused possibly by repeated sediment slumping and debris flows in the past. We speculate that this deformation may have created shallow faults that are suitable to conduits for the migration and discharge of gas and fluid. Three seepage structures were selected to study about their fluid-seep conditions around the sea floor level. Hieroglyph seepage structure is located at the northern end of the dense area of the structures. Kitami and Chaos structures are located about 2 and 7 km respectively apart from the Hieroglyph structure within the dense area. Large plumes on echograms and higher methane contents in the water column confirm gas seepage activities at the three structures. There observed at least two and four plumes at the Hieroglyph and Chaos structures, respectively. Each gas chimney image in seismic reflection profiles was traced to connect each BSR and seepage structure. Both pull-up and disturbed structures of BSR around the gas chimney images were interpreted as to be indications of significant heat flows caused by ascending fluid at both Kitami and Chaos structures. On the other hand, almost no pull-up/disturbance of BSR was observed at the Hieroglyph structure, suggesting little water seepage. The seep activity may vary with time off the Sakhalin. The Hieroglyph structure is located at the edge of a dense area of the seepage structures. It might serve as an indicator for the long-term activity of the fluid seepage system off the Sakhalin.

著者

廣重 亮一 曽我部 昭好 山崎 一利 高橋 信夫 井上 章二 金城 一彦

出版者

公益社団法人 日本木材保存協会

雑誌

木材保存 (ISSN:02879255)

巻号頁・発行日

vol.43, no.1, pp.13-27, 2017

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木質住宅の基礎構造部における配管貫通部の防蟻を目的として,非加硫ブチルゴム,EPDM(エチレン・プロピレン・ジエン系ゴム)の2種のゴム基材とそれらに防蟻剤を添加したゴム基材の防蟻性を室内で検討した。また,現場での給水および排水配管2種のさや管工法における利用を想定した形状の試験体を作成し,それらの防蟻性能を野外試験で検討した。<BR>その結果,非加硫ブチルゴムは室内試験でDOT(八ホウ酸二ナトリウム四水和物)無添加で穿孔が見られたが,DOT を添加することで穿孔は抑えられ,ビフェントリン0.175%添加で穿孔はまったくみられなかった。野外試験ではDOT 無添加,添加区とも食害・貫通は見られなかった。<BR>EPDM も室内試験では非加硫ブチルゴムと同様の傾向を示したが,排水系及び給水系EPDM パッキンとも野外試験では食害は全く見られなかった。非加硫ブチルゴム,EPDMパッキン中のDOT の各試験における溶脱は僅かで,長期に有効な防蟻機能を維持可能なことが確認され,これらのゴム基材は,木質住宅の基礎構造部における配管貫通部の防蟻に充分使用できると考えた。