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(2)\u306b\u304a\u3044\u3066\u306f\u03c4&acd;\u03b5\u66f2\u7dda\u304c\u91cd\u8981\u3068\u306a\u3063\u3066\u304f\u308b\u306e\u3067, \u904e\u5727\u5bc6\u6bd4\u304c\u5909\u5316\u3059\u308b\u5834\u5408\u03c4&acd;\u03b5\u66f2\u7dda\u304c\u5982\u4f55\u306a\u308b\u7279\u6027\u3092\u793a\u3059\u304b\u306b\u3064\u3044\u3066\u5b9f\u9a13\u7814\u7a76\u3092\u884c\u3046\u3068\u540c\u6642\u306b\u03c4&acd;\u03c3\u7279\u6027\u306b\u3064\u3044\u3066\u3082\u8003\u5bdf\u3092\u52a0\u3048\u305f\u3002\u307e\u305f\u6c96\u7e04\u306b\u304a\u3051\u308b\u8fb2\u5730\u4fdd\u5168\u4e0a, \u91cd\u8981\u306a\u8ab2\u984c\u3068\u306a\u308b\u7b2c\u4e09\u7d00\u306e\u5cf6\u5c3b\u5c64\u6ce5\u5ca9(\u904e\u5727\u5bc6\u7c98\u571f)\u659c\u9762\u306e\u5b89\u5b9a\u554f\u984c\u306b\u306f\u672a\u89e3\u660e\u306a\u70b9\u304c\u591a\u3044\u305f\u3081, \u5b89\u5b9a\u89e3\u6790\u306b\u9032\u884c\u6027\u7834\u58ca\u3084\u5b8c\u5168\u8edf\u5316\u306e\u6982\u5ff5\u306e\u5c0e\u5165\u3092\u8003\u3048, Skempton\u6cd5\u3092\u7528\u3044\u3066\u8edf\u5316\u6ce5\u5ca9\u306e\u6b8b\u7559\u5f37\u5ea6\u3092\u6c42\u3081\u305f\u3002\u305d\u3057\u3066\u5b9f\u969b\u306e\u5730\u3059\u3079\u308a\u4e8b\u4f8b\u306e\u5b89\u5b9a\u89e3\u6790\u306b\u9069\u7528\u3057\u3066, \u5730\u3059\u3079\u308a\u6a5f\u69cb\u89e3\u660e\u306e\u4e00\u52a9\u306b\u3057\u305f\u3002\u307e\u305a, \u4e00\u822c\u7684\u306aSkempton\u306e\u8a66\u9a13\u6cd5\u3092\u7528\u3044\u3066\u5cf6\u5c3b\u5c64\u8edf\u5316\u6ce5\u5ca9\u306e\u6b8b\u7559\u5f37\u5ea6\u5b9a\u6570\u3092\u6c42\u3081\u305f(2-2)\u3002\u5cf6\u5c3b\u5c64\u6ce5\u5ca9\u3067\u307f\u3089\u308c\u308b\u7834\u58ca\u9762\u306b\u306f\u93e1\u808c\u304c\u5f62\u6210\u3055\u308c\u3066\u304a\u308a, \u6b8b\u7559\u5f37\u5ea6\u306b\u9054\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u3046\u304b\u304c\u3048\u308b\u3002\u3057\u304b\u3057\u6ce5\u5ca9\u306b\u3064\u3044\u3066\u93e1\u808c\u304c\u8a8d\u3081\u3089\u308c\u308b\u307b\u3069\u306e\u5909\u4f4d\u3092\u4e0e\u3048\u308b\u30bb\u30f3\u65ad\u8a66\u9a13\u306f\u3044\u307e\u307e\u3067\u884c\u306a\u308f\u308c\u3066\u304a\u3089\u305a, \u6b8b\u7559\u5f37\u5ea6\u306b\u95a2\u3059\u308b\u77e5\u898b\u306f\u7686\u7121\u3067\u3042\u308b\u3002\u3057\u305f\u304c\u3063\u3066, \u3059\u3079\u308a\u9762\u4ed8\u8fd1\u306e\u65b0\u9bae\u8edf\u5316\u6ce5\u5ca9\u3068\u5b8c\u5168\u8edf\u5316\u7c98\u571f, \u81ea\u7136\u5206\u96e2\u9762, \u304a\u3088\u3073\u4f5c\u6210\u5206\u96e2\u9762\u306b\u3064\u3044\u3066Skempton\u6cd5\u306b\u3088\u308b\u9577\u671f\u7e70\u8fd4\u3057\u30bb\u30f3\u65ad\u8a66\u9a13\u3092\u884c\u306a\u3044, 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\u03c6_<Nr>=19\u00b0\u306f\u65b0\u9bae\u8edf\u5316\u6ce5\u5ca9\u3084\u5206\u96e2\u9762\u306e\u03c6_<dr>\u3088\u308a\u3082\u5927\u304d\u3044\u3002\u8edf\u5316\u6ce5\u5ca9\u306e\u30d6\u30ea\u30c8\u30eb\u6307\u6570(I_B)\u306f, \u03c3'_n=1&acd;5kg/cm^2\u306e\u5fdc\u529b\u7bc4\u56f2\u3067I_B=80&acd;50%\u3068\u306a\u308b\u3002\u307e\u305f\u03c6'_r&acd;\u7c98\u571f\u5206\u306e\u95a2\u4fc2\u304b\u3089\u5cf6\u5c3b\u5c64\u6ce5\u5ca9\u306fOxford Clay, Jari Jakfield, London Clay\u306e\u904e\u5727\u5bc6\u7c98\u571f\u3068\u985e\u4f3c\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u660e\u3089\u304b\u306b\u306a\u3063\u305f\u3002","subitem_description_type":"Other"},{"subitem_description":"\u3064\u3065\u3044\u3066, \u03c4&acd;\u03b5\u7279\u6027\u3092\u7528\u3044\u3066\u6b8b\u7559\u5f37\u5ea6\u3092\u6c42\u3081\u308b\u8457\u8005\u306e\u624b\u6cd5\u306b\u3064\u3044\u3066\u8ff0\u3079\u305f(2-3)\u3002\u3059\u306a\u308f\u3061, \u9577\u671f\u30bb\u30f3\u65ad\u8a66\u9a13\u7d50\u679c\u3092\u5f0f\u5316\u3057, \u305d\u306e\u6700\u5927\u5024\u304a\u3088\u3073\u6700\u7d42\u5024\u3092, \u305d\u308c\u305e\u308c\u30d4\u30fc\u30af\u5f37\u5ea6, \u6b8b\u7559\u5f37\u5ea6\u3068\u307f\u306a\u3059\u3082\u306e\u3067\u3042\u308b\u3002\u3053\u308c\u306b\u306f\u6392\u6c34\u6761\u4ef6\u3092\u6e80\u8db3\u3059\u308b\u7de9\u901f\u306a\u30bb\u30f3\u65ad\u5f37\u5ea6\u304c\u8981\u6c42\u3055\u308c\u308b\u3002\u3057\u304b\u3057, \u6025\u901f\u30bb\u30f3\u65ad\u7d50\u679c(\u975e\u6392\u6c34)\u304b\u3089\u6b8b\u7559\u5f37\u5ea6\u3092\u63a8\u5b9a\u3059\u308b\u5834\u5408\u306f\u03c4&acd;\u03b5\u66f2\u7dda\u306e\u6700\u5927\u5024\u3068\u6700\u7d42\u5024\u3092\u6642\u9593\u52b9\u679c\u3067\u88dc\u6b63\u3057\u6c42\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b(2-3-3) \u3053\u308c\u3089\u306e\u7d50\u679c\u3092Skempton\u6cd5\u306b\u3088\u308b\u8a66\u9a13\u3068\u5bfe\u6bd4\u3055\u305b\u305f\u3002\u3059\u306a\u308f\u3061\u03c4&acd;\u03b5\u66f2\u7dda\u3092\u5229\u7528\u3059\u308b\u624b\u6cd5\u306f, Skempton\u6cd5\u3088\u308a\u03c3=0.1&acd;0.7kg/cm^2\u306e\u7bc4\u56f2\u306b\u304a\u3044\u30661&acd;17%\u7a0b\u5ea6\u5927\u304d\u3081\u306e\u6b8b\u7559\u5f37\u5ea6\u304c\u4e0e\u3048\u3089\u308c\u308b\u304c, \u4f5c\u6210\u5206\u96e2\u9762\u306b\u3088\u308a\u6c42\u3081\u308b\u5834\u5408\u3068\u540c\u69d8, \u77ed\u6642\u9593\u306b\u6b8b\u7559\u5f37\u5ea6\u3092\u3048\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u6709\u52b9\u306a\u65b9\u6cd5\u3068\u3044\u3048\u3088\u3046\u3002\u4e00\u9762\u30bb\u30f3\u65ad\u8a66\u9a13\u306b\u3088\u308bSkempton\u6cd5\u306b\u5bfe\u3057, \u8457\u8005\u306f\u4e09\u8ef8\u5727\u7e2e\u8a66\u9a13\u306b\u3088\u308b\u6b8b\u7559\u5f37\u5ea6\u6c7a\u5b9a\u6cd5\u3092\u63d0\u6848\u3057\u305f(3)\u3002\u305d\u306e\u8a66\u9a13\u306b\u304a\u3051\u308b\u5727\u7e2e\u6a5f\u69cb\u306f, \u5727\u7e2e\u6642\u306b\u4e0a\u90e8\u4f9b\u8a66\u4f53\u304c\u4f5c\u6210\u30bb\u30f3\u65ad\u9762\u306b\u6cbf\u3063\u3066\u6ed1\u52d5\u3067\u304d\u308b\u3088\u3046\u306bBB\u30d4\u30b9\u30c8\u30f3\u3092\u901a\u3058\u3066\u8ca0\u8377\u3059\u308b\u3082\u306e\u3067\u3042\u308a, \u6b8b\u7559\u5f37\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306e\u5f0f\u306f\u7834\u58ca\u9762\u306e\u5fdc\u529b\u89e3\u6790\u306b\u3088\u3063\u3066\u5c0e\u3073\u3044\u305f\u3002\u3059\u306a\u308f\u3061[numerical formula](3-2-18)\u5f0f\u306e\u03c4^^^-(\u03b7)\u306f, BB\u30d4\u30b9\u30c8\u30f3\u306e\u3082\u3068\u3067\u4e0a\u4e0b\u4f9b\u8a66\u4f53\u304c\u76f8\u5bfe\u7684\u306a\u3059\u3079\u308a\u5909\u4f4d\u3092\u8d77\u3053\u3059\u3068\u304d\u306b\u8ef8\u5727\u304c\u504f\u5fc3\u8377\u91cd\u3068\u3057\u3066\u4f5c\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u5b9f\u969b\u306b\u3059\u3079\u308a\u9762\u306b\u751f\u3058\u308b\u30bb\u30f3\u65ad\u5fdc\u529b(3-2 -12)\u5e73\u5747\u5024\u3067\u4e0e\u3048\u3089\u308c, \u6709\u52b9\u30bb\u30f3\u65ad\u9762\u7a4d(3-2-21)\u3068\u30b4\u30e0\u30b9\u30ea\u30fc\u30d6\u306e\u62d8\u675f\u306b\u3088\u308b\u8ef8\u5dee\u5fdc\u529b\u306e\u5897\u5206(3-2-31)\u304c\u8003\u616e\u3055\u308c\u3066\u3044\u308b\u3002\u305d\u3057\u3066\u5b8c\u5168\u306b\u5f62\u6210\u3055\u308c\u305f\u3059\u3079\u308a\u9762, \u3059\u306a\u308f\u3061\u4f5c\u6210\u30bb\u30f3\u65ad\u9762\u306b\u6cbf\u3046\u30bb\u30f3\u65ad\u79fb\u52d5\u306b\u304a\u3044\u3066, \u5b9a\u5e38\u72b6\u614b\u306b\u5165\u3063\u305f\u5f8c\u306b\u767a\u63ee\u3055\u308c\u308b\u5fdc\u529b\u306f\u30d2\u30ba\u30df\u306e\u5927\u304d\u3055\u306b\u304b\u304b\u308f\u3089\u305a\u4e00\u5b9a\u5024\u3092\u793a\u3059\u306e\u3067, \u03c4^^^-(\u03b7)&acd;\u03b5\u95a2\u4fc2\u306b\u304a\u3044\u3066d\u03c4^^^-(\u03b7)/d\u03b5=0\u306b\u306a\u3063\u305f\u3068\u304d\u306e\u03c4^^^-(\u03b7)\u5024\u3092\u6b8b\u7559\u5f37\u5ea6\u03c4_r\u3068\u8003\u3048\u308c\u3070\u3088\u3044\u3002\u3053\u306e\u624b\u6cd5\u3092\u9ce5\u6816\u8a66\u6599\u306b\u9069\u7528\u3057\u305f\u7d50\u679c, C'_f=0.569kg/cm^2,\u03c6'_f=23\u00b050","subitem_description_type":"Other"},{"subitem_description":"This paper deals with the methods to determine the residual strength necessary for stability analysis of the slope and the application of the residual strength to practical problems. In order to obtain the residual strength, it is necessary to develop a simpler and reasonably satisfactory method to measure the shear resistance after large displacement. Test techniques and devices falling under this category of the method have been developed by Skempton, Bishop and others, but they still involve many problems in the interpretation of their test results and the mechanism of the devices. Based on his own studies and works done in foreign countries on the subject, the author proposes following two methods to evaluate the shear strength. (1) If a shearing of an overconsolidated clay occurs along a fully-formed slip plane, the shear stress mobilized after reaching the equilibrium state should be a fixed value, independently of the magnitude of the strain (displacement). The test method to satisfy this condition could be as follows : The residual strength is obtained using the specimen having the shear plane cut at an expected angle to the horizontal and the triaxial compression apparatus having a mechanism of compression and enable the top half of the specimen to move in lateral direction. (2) Noting the facts that the shear stress-strain (displacement) characteristics of an overconsolidated clay is affected by the stress history and that the residual value depends strongly on both the magnitude of the peak value and the shape of the curve after the post peak, the author tried to formularize a curve applicable to the determination of the residual strength. Since the shear stress-strain (displacement) curve is very important in the method (2) mentioned above, a few points have also been discussed on the shear stress-strain (displacement) characteristics in the case that the overconsolidation ratio changes and also on the \u03c4&acd;\u03c3 characteristics.","subitem_description_type":"Other"},{"subitem_description":"There are a number of unsolved points related to the stability of natural slopes in Shimajiri mudstone of an overconsolidated clay in Okinawa. In order to approach these problems the author, introducing the concept of the progressive failure and softening to the stability analysis of the slope, has obtained the residual strength of a softened mudstone by the reversal direct shear technique developed by Skempton. The results obtained were applied to stability analyses of actual landslides. The analyses are expected to be of much aid to make clear the mechanism of landslides. In the first place, the residual strength of softened Shimajiri mudstone has been determined with common procedure of the reversal shear test (2.2). From the slickenside observed on natural slip planes in Shimajiri mudstone, it is seen that the shear strength mobilized had fallen to the residual value. No reports, however, have been published concerning the residual strength of Shimajiri mudstone and no shear tests have been performed either for such large displacements as the surface of shear plane is polished to form the slickensides afterwards. Hence, the drained reversal shear tests were performed on intact softened mudstones, fully-softened clays, natural joints, and specimens with a pre-cut plane. The following results have been obtained : (1) After 5-cycle shear tests, no further reduction of strength occurred in the intact softened mudstone. Consequently, no further tests were carried out beyond 5-cycles. (2) The shear tests on intact softened mustone have shown the peak strength parameters of c_<df>=1.20&acd;1.55kg/(cm)^2 and \u03c6_<df>=19&acd;22\u00b0, and the residual strength parameters of c_<dr>=0 and \u03c6_<df>=17&acd;19\u00b0. (3) The displacements necessary to reach the residual strength along the natural joint and pre-cut plane of specimens have been smaller than those of intact samples : a single cycle of reversal shear test has been sufficient to reduce the strength to a value very close to t","subitem_description_type":"Other"},{"subitem_description":"\u7d00\u8981\u8ad6\u6587","subitem_description_type":"Other"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"\u7409\u7403\u5927\u5b66\u8fb2\u5b66\u90e8"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"jpn"}]},"item_1617186783814":{"attribute_name":"Identifier","attribute_value_mlt":[{"subitem_identifier_type":"HDL","subitem_identifier_uri":"http://hdl.handle.net/20.500.12000/4158"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_1522646500366":"ISSN","subitem_1522646572813":"0370-4246"},{"subitem_1522646500366":"NCID","subitem_1522646572813":"AN00250548"}]},"item_1617186941041":{"attribute_name":"Source Title","attribute_value_mlt":[{"subitem_1522650068558":"ja","subitem_1522650091861":"\u7409\u7403\u5927\u5b66\u8fb2\u5b66\u90e8\u5b66\u8853\u5831\u544a"},{"subitem_1522650068558":"en","subitem_1522650091861":"The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueNumber":"26","bibliographicPageEnd":"272","bibliographicPageStart":"183"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_1522305645492":"VoR","subitem_1600292170262":"http://purl.org/coar/version/c_970fb48d4fbd8a85"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","filename":"KJ00000162008.pdf","mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://u-ryukyu.repo.nii.ac.jp/record/2003168/files/KJ00000162008.pdf"},"version_id":"7f30fa9a-5af4-48f1-ab10-48ed3f88fb06"}]},"item_title":"\u7c98\u571f\u306e\u6b8b\u7559\u5f37\u5ea6\u6c7a\u5b9a\u306b\u95a2\u3059\u308b\u7814\u7a76(\u8fb2\u696d\u5de5\u5b66\u79d1)","item_type_id":"15","owner":"1","path":["1642837911830","1642838407312"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2008-02-14"},"publish_date":"2008-02-14","publish_status":"0","recid":"2003168","relation_version_is_last":true,"title":["\u7c98\u571f\u306e\u6b8b\u7559\u5f37\u5ea6\u6c7a\u5b9a\u306b\u95a2\u3059\u308b\u7814\u7a76(\u8fb2\u696d\u5de5\u5b66\u79d1)"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2022-02-15T05:31:32.280553+00:00"}