{"_buckets": {"deposit": "cab4a0c1-21d1-43a0-8fec-0d8700a7781c"}, "_deposit": {"id": "7350", "owners": [], "pid": {"revision_id": 0, "type": "depid", "value": "7350"}, "status": "published"}, "_oai": {"id": "oai:kitami-it.repo.nii.ac.jp:00007350"}, "item_3_alternative_title_198": {"attribute_name": "\u305d\u306e\u4ed6\u306e\u30bf\u30a4\u30c8\u30eb", "attribute_value_mlt": [{"subitem_alternative_title": "Geotechnical properties of the shallow type methane hydrate-bearing sediments in the Lake Baikal"}]}, "item_3_biblio_info_186": {"attribute_name": "\u66f8\u8a8c\u60c5\u5831", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2007-07", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "2", "bibliographicPageEnd": "105", "bibliographicPageStart": "95", "bibliographicVolumeNumber": "2", "bibliographic_titles": [{"bibliographic_title": "\u5730\u76e4\u5de5\u5b66\u30b8\u30e3\u30fc\u30ca\u30eb"}]}]}, "item_3_description_184": {"attribute_name": "\u6284\u9332", "attribute_value_mlt": [{"subitem_description": "2005\uff0c2006 \u5e74\u306b\uff0c\u30ed\u30b7\u30a2\u30fb\u30d0\u30a4\u30ab\u30eb\u6e56\u306b\u3066\u5b9f\u65bd\u3057\u305f\u8868\u5c64\u578b\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u8ce6\u5b58\u5730\u76e4\u8abf\u67fb\u304b\u3089\uff0c\u6e56\u5e95\u8868\u5c64\u571f\u306e\u5de5\u5b66\u7684\u7279\u6027\u306b\u3064\u3044\u3066\u691c\u8a0e\u3092\u884c\u3063\u305f\u3002\u8abf\u67fb\u3067\u306f\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u3092\u542b\u3080\u6e56\u5e95\u8868\u5c64\u306e\u5806\u7a4d\u571f\u63a1\u53d6\uff0c\u30b3\u30a2\u89b3\u5bdf\u304a\u3088\u3073\u73fe\u5730\u8239\u4e0a\u8a66\u9a13\uff08\u30b3\u30fc\u30f3\u8cab\u5165\u8a66\u9a13\uff0c\u30d9\u30fc\u30f3\u305b\u3093\u65ad\u8a66\u9a13\uff0c\u30d9\u30f3\u30c0\u30fc\u30a8\u30ec\u30e1\u30f3\u30c8\u8a66\u9a13\uff0c\u4e00\u8ef8\u5727\u7e2e\u8a66\u9a13\uff09\u3092\u884c\u3063\u305f\u3002\u305d\u306e\u969b\uff0c\u8a66\u6599\u306f\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u542b\u6709\u5806\u7a4d\u571f\u306e\u307b\u304b\u306b\uff0c\u97f3\u6ce2\u63a2\u67fb\u306b\u3088\u308a\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u306e\u5b58\u5728\u304c\u78ba\u8a8d\u3055\u308c\u306a\u304b\u3063\u305f\u5730\u76e4\u304b\u3089\u3082\u63a1\u53d6\u3057\uff0c\u5404\u7a2e\u8a66\u9a13\u3067\u306e\u6bd4\u8f03\u3092\u884c\u3063\u305f\u3002\u305d\u306e\u7d50\u679c\uff0c\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u3092\u542b\u3080\u5730\u76e4\u306e\u8868\u5c64\u5806\u7a4d\u571f\u306f\uff0c\u30e1\u30bf\u30f3\u30cf\u30a4\u30c9\u30ec\u30fc\u30c8\u304c\u5b58\u5728\u3057\u3066\u3044\u306a\u3044\u5730\u76e4\u306e\u8a66\u6599\u306b\u6bd4\u3079\u3066\uff0c\u6e2c\u5b9a\u5024\u304c\u5806\u7a4d\u6df1\u5ea6\u306b\u4f9d\u5b58\u305b\u305a\uff0c\u4f4e\u3044\u5024\u3092\u793a\u3057\u305f\u3002\u3053\u306e\u539f\u56e0\u3068\u3057\u3066\uff0c\u30ac\u30b9\u3084\u6c34\u306e\u6e67\u51fa\u306b\u3088\u308b\u5730\u76e4\u306e\u64b9\u4e71\u3068\u8a66\u6599\u63a1\u53d6\u6642\u306e\u5fdc\u529b\u89e3\u653e\u304c\u95a2\u4fc2\u3057\u3066\u3044\u308b\u3068\u8003\u3048\u3089\u308c\u305f\u3002\nThe site investigation of the shallow type methane hydrate-bearing ground was performed on the Lake Baikal, Russia, in 2005 and 2006, and the geotechnical properties of the bottom sediment were examined. In the investigation, sediments with methane hydrates were sampled, and several kinds of tests (cone penetration, vane shear, bender element, uniaxial compression tests) were performed on the board. At the same time, samples were also retrieved from the grounds without methane hydrates. Then, the soil strengths and physical properties for both samples were compared. As a result, it was found that the soil strengths of surface sediments with methane hydrates were lower than those without methane hydrates regardless of the depth. 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