{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1390282679518394880.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.11408/jsidre1965.1993.167_1"}},{"identifier":{"@type":"NAID","@value":"130004347868"}}],"dc:title":[{"@language":"en","@value":"Compressibility and Structural Change of Kanumatsuchi"},{"@value":"鹿沼土の圧縮特性と構造変化"}],"description":[{"type":"abstract","notation":[{"@language":"en","@value":"Kanumatsuchi (Kanuma pumice stratum) consists of pyroclastics originated from Akagi volcano (Gunma prefecture). This stratum composes the Takaragi loam stratum which exists in the Northern Kanto loam stratum. Its distribution region is Tochigi and Ibaraki prefectures, and its distribution area is about 9, 900km<SUP>2</SUP>.<BR>Kanumatsuchi is mainly composed of weathered pumice grain of which the diameter is about 2-20mm.Other components are Imogolite, small pumice and small volcanic gravel. Kanumatsuchi has high water content and large void ratio. Therefore, its strength is very low and its compressibility is high. Moreover, the membrane penetration on triaxial compression test is conspicuous and its penetration volume is considerably large.<BR>In this paper, we investigated the compressibility of Kanumatsuchi, and analyzed the compressive mechanism based on the results by considering the membrane penetration. Compression test was conducted by consolidation test and triaxial compression test.<BR>As the results of this study, the following facts were obtained:<BR>1) Compression volume of Kanumatsuchi is very little within the region of low pressure, but when pressure is over the preconsolidation stress (2×98kN/m<SUP>2</SUP>), the volume becomes very large due to the crush of weathered pumices.<BR>2) Compression volume and degree of weathered pumice's crush are not considerably affected by the difference of loading system, but the compression velocity is much affected. That is to say, in the case of consolidation test, compression volume just after the loading is very high, but in the case of triaxial compression test, compression volume begins to increase ten minutes after the loading.<BR>3) Compression ratio of Imogolite and large pore are larger than that of weathered pumice, but constituent ratio of weathered pumice to the total compression volume is larger than that of other components, because the volume of weathered pumice is about 80% of the total volume of Kanumatsuchi."},{"@value":"赤城山に由来する粗粒火山灰土である鹿沼土(鹿沼軽石層)は, 直径2～20mmの風化軽石を主体に軽石粒, イモゴライト, 岩片の4要素からできている。風化軽石は軟質かつ多孔質で含水比が高いため強度が小さく, また, 大きな圧縮性を示す特殊土である。この圧縮量の多さは主として風化軽石の圧縮によるものであるが, 4要素間には大きな間隙が存在するため間隙の構造は複雑で, 間隙の圧縮も含まれる圧縮挙動は複雑である。本研究は, 圧密試験と三軸圧縮試験による圧縮量を測定すると同時に, 各要素の圧縮率およびゴム膜貫入率を実験により求め, これらの結果を利用して鹿沼土の圧縮機構の解明を行ったものである。"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410009222024736000","@type":"Researcher","personIdentifier":[{"@type":"NRID","@value":"9000256650982"}],"foaf:name":[{"@language":"en","@value":"TOMITA Heishiro"},{"@language":"ja","@value":"富田 平四郎"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Faculty of Agriculture, Utsunomiya University"},{"@language":"ja","@value":"宇都宮大学農学部"}]},{"@id":"https://cir.nii.ac.jp/crid/1030003658339211268","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"00011908"},{"@type":"NRID","@value":"1000000011908"},{"@type":"NRID","@value":"9000005625378"},{"@type":"NRID","@value":"9000256441029"},{"@type":"NRID","@value":"9000256654052"},{"@type":"NRID","@value":"9000005339824"},{"@type":"NRID","@value":"9000256648624"},{"@type":"NRID","@value":"9000256648710"},{"@type":"NRID","@value":"9000256649949"},{"@type":"NRID","@value":"9000256651182"},{"@type":"NRID","@value":"9000005336718"},{"@type":"NRID","@value":"9000243908647"},{"@type":"NRID","@value":"9000254166256"},{"@type":"NRID","@value":"9000255845741"},{"@type":"NRID","@value":"9000255832152"},{"@type":"NRID","@value":"9000256440741"},{"@type":"NRID","@value":"9000256445078"},{"@type":"NRID","@value":"9000256649339"},{"@type":"NRID","@value":"9000256651948"},{"@type":"NRID","@value":"9000006238319"},{"@type":"NRID","@value":"9000255897593"},{"@type":"NRID","@value":"9000256648534"},{"@type":"NRID","@value":"9000008446912"},{"@type":"NRID","@value":"9000004998469"},{"@type":"NRID","@value":"9000256442810"},{"@type":"NRID","@value":"9000256442903"},{"@type":"NRID","@value":"9000256649551"},{"@type":"NRID","@value":"9000256650714"},{"@type":"NRID","@value":"9000256651776"},{"@type":"NRID","@value":"9000003053242"},{"@type":"NRID","@value":"9000003064128"},{"@type":"NRID","@value":"9000256442875"},{"@type":"NRID","@value":"9000256439444"},{"@type":"NRID","@value":"9000256649820"},{"@type":"NRID","@value":"9000256648541"},{"@type":"NRID","@value":"9000256441699"},{"@type":"NRID","@value":"9000256444915"},{"@type":"NRID","@value":"9000256649577"},{"@type":"NRID","@value":"9000256650860"},{"@type":"NRID","@value":"9000256650338"},{"@type":"NRID","@value":"9000006221083"},{"@type":"NRID","@value":"9000022025359"},{"@type":"NRID","@value":"9000019980749"},{"@type":"NRID","@value":"9000254166259"},{"@type":"NRID","@value":"9000256443028"},{"@type":"NRID","@value":"9000256445622"},{"@type":"NRID","@value":"9000256652231"},{"@type":"NRID","@value":"9000256649547"},{"@type":"NRID","@value":"9000256648538"},{"@type":"NRID","@value":"9000019937102"},{"@type":"NRID","@value":"9000256443318"},{"@type":"NRID","@value":"9000256443012"},{"@type":"NRID","@value":"9000256441883"},{"@type":"NRID","@value":"9000255898316"},{"@type":"NRID","@value":"9000399787320"},{"@type":"NRID","@value":"9000256439476"},{"@type":"NRID","@value":"9000256648748"},{"@type":"NRID","@value":"9000256649321"},{"@type":"NRID","@value":"9000256652539"},{"@type":"NRID","@value":"9000256650744"},{"@type":"NRID","@value":"9000256651089"},{"@type":"NRID","@value":"9000254591190"},{"@type":"NRID","@value":"9000256648712"},{"@type":"NRID","@value":"9000256650983"},{"@type":"NRID","@value":"9000019981329"},{"@type":"NRID","@value":"9000256648707"},{"@type":"NRID","@value":"9000256649826"},{"@type":"NRID","@value":"9000256650973"},{"@type":"NRID","@value":"9000256648544"},{"@type":"NRID","@value":"9000019985456"},{"@type":"NRID","@value":"9000255898547"},{"@type":"NRID","@value":"9000255897595"},{"@type":"NRID","@value":"9000256649650"},{"@type":"NRID","@value":"9000256649040"},{"@type":"NRID","@value":"9000020500039"},{"@type":"NRID","@value":"9000020013876"},{"@type":"NRID","@value":"9000255832181"},{"@type":"NRID","@value":"9000255832135"},{"@type":"NRID","@value":"9000256443047"},{"@type":"NRID","@value":"9000256441612"},{"@type":"NRID","@value":"9000256649506"},{"@type":"NRID","@value":"9000256649528"},{"@type":"NRID","@value":"9000256651503"},{"@type":"NRID","@value":"9000256648530"},{"@type":"NRID","@value":"9000261651133"},{"@type":"NRID","@value":"9000256443310"},{"@type":"NRID","@value":"9000256439880"},{"@type":"NRID","@value":"9000256442850"},{"@type":"NRID","@value":"9000256650254"},{"@type":"NRID","@value":"9000256492019"},{"@type":"NRID","@value":"9000018509406"},{"@type":"NRID","@value":"9000017722157"},{"@type":"NRID","@value":"9000240199026"},{"@type":"NRID","@value":"9000255832113"},{"@type":"NRID","@value":"9000256442625"},{"@type":"NRID","@value":"9000256445214"},{"@type":"NRID","@value":"9000256648747"},{"@type":"NRID","@value":"9000256650004"},{"@type":"NRID","@value":"9000256650509"},{"@type":"NRID","@value":"9000256651534"}],"foaf:name":[{"@language":"en","@value":"NAKANO Masashi"},{"@language":"ja","@value":"中野 政詩"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Faculty of Agriculture, Tokyo University"},{"@language":"ja","@value":"東京大学農学部"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03872335"},{"@type":"EISSN","@value":"18847234"}],"prism:publicationName":[{"@language":"en","@value":"Transactions of The Japanese Society of Irrigation, Drainage and Reclamation Engineering"},{"@language":"ja","@value":"農業土木学会論文集"},{"@language":"en","@value":"Transactions of The Japanese Society of Irrigation, Drainage and Reclamation Engineering"},{"@language":"ja","@value":"農土論集"}],"dc:publisher":[{"@language":"en","@value":"The Japanese Society of Irrigation, Drainage and Rural Engineering"},{"@language":"ja","@value":"社団法人 農業農村工学会"}],"prism:publicationDate":"1993","prism:volume":"1993","prism:number":"167","prism:startingPage":"1","prism:endingPage":"10,a1"},"availableAt":"1993","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=%E9%B9%BF%E6%B2%BC%E5%9C%9F","dc:title":"鹿沼土"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%9C%A7%E7%B8%AE","dc:title":"圧縮"},{"@id":"https://cir.nii.ac.jp/all?q=%E3%82%B4%E3%83%A0%E8%86%9C%E8%B2%AB%E5%85%A5","dc:title":"ゴム膜貫入"},{"@id":"https://cir.nii.ac.jp/all?q=%E9%A2%A8%E5%8C%96%E8%BB%BD%E7%9F%B3","dc:title":"風化軽石"},{"@id":"https://cir.nii.ac.jp/all?q=%E3%82%A4%E3%83%A2%E3%82%B4%E3%83%A9%E3%82%A4%E3%83%88","dc:title":"イモゴライト"}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:0037915382"},{"@type":"CIA","@value":"130004347868"}]}