Small displacements of Shinkansen viaducts can be fatal for running safety. Therefore, not only ultimate bearing capacity but settlement is an important verification index of the foundation structures. The plain area at Omura city in Nagasaki prefecture, located between Takeo-onsen and Nagasaki station of the Kyushu Shinkansen, is composed of unusual soil, that is sandy gravel with coble stone, and the Shinkansen viaducts have not been constructed on such type of the soil. In addition, the soil in Omura was not simply considered as a bearing stratum for the shallow foundations because N-values from the standard penetration test varied widely, and the minimum was 20. However, shallow foundations have a cost advantage over other foundation types like pile foundations. Therefore, the authors examined the application of shallow foundations in this site with the in-situ test, self-boring typed in-situ friction tests, plate loading tests, and triaxial tests using the specimens sampled by gel push method. As a result, the design values of the soil were suggested, and the performance required for shallow foundations was verified with the proper management method.
"},{"@language":"ja","@value":"九州新幹線（武雄温泉・長崎間）の長崎県大村市内の平野部は，ラーメン高架橋および桁式高架橋で構成される区間であり，扇状地堆積物を支持層とする直接基礎形式が採用された。供用開始後も含めて高精度の軌道管理が必要とされる新幹線高架橋の基礎においては，極限支持力を有するだけでなく，変位を極力生じさせないことが求められる。当該地区の地盤は概ね鉄道構造物の支持地盤条件の目安（N 値 30）以上であるが，局所的に N 値が 20 程度であり，新幹線高架橋に直接基礎を採用するためには入念な検討によりその支持性能を評価する必要があった。本稿では，原位置せん断摩擦試験等詳細試験による支持地盤の設計用値の設定，最大載荷板幅 1,000mm の平板載荷試験による設計用値の妥当性の確認および施工時の支持層管理手法の提案により，新幹線高架橋に求められる支持性能を有することを確認した結果を報告する。
"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410577763027922176","@type":"Researcher","foaf:name":[{"@language":"en","@value":"SOGA Daisuke"},{"@language":"ja","@value":"曽我 大介"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Japanese Railway Construction, Transport and Technology Agency, Hokuriku Shinkansen Construction Bureau"},{"@language":"ja","@value":"鉄道・運輸機構・北陸新幹線建設局"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922181","@type":"Researcher","foaf:name":[{"@language":"en","@value":"YAMAZAKI Takayuki"},{"@language":"ja","@value":"山崎 貴之"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Japanese Railway Construction, Transport and Technology Agency, 2nd Construction Division"},{"@language":"ja","@value":"鉄道・運輸機構・建設部"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922180","@type":"Researcher","foaf:name":[{"@language":"en","@value":"TAKANO Yusuke"},{"@language":"ja","@value":"高野 裕輔"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"鉄道・運輸機構・北陸新幹線建設局"},{"@language":"en","@value":"Japanese Railway Construction, Transport and Technology Agency, Hokuriku Shinkansen Construction Bureau"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922177","@type":"Researcher","foaf:name":[{"@language":"en","@value":"SAKATA Akira"},{"@language":"ja","@value":"阪田 暁"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Japanese Railway Construction, Transport and Technology Agency, Design Division"},{"@language":"ja","@value":"鉄道・運輸機構・設計部"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922178","@type":"Researcher","foaf:name":[{"@language":"en","@value":"NISHIOKA Hidetoshi"},{"@language":"ja","@value":"西岡 英俊"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Chuo University, School of Science and Technology"},{"@language":"ja","@value":"中央大学・理工学部都市環境学科"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922179","@type":"Researcher","foaf:name":[{"@language":"en","@value":"SANAGAWA Taisuke"},{"@language":"ja","@value":"佐名川 太亮"}],"jpcoar:affiliationName":[{"@language":"en","@value":"Railway Technical Research Institute, Foundation & Geotechnical Engineering Structure Technology Division"},{"@language":"ja","@value":"鉄道総合技術研究所・構造物技術研究部"}]},{"@id":"https://cir.nii.ac.jp/crid/1410577763027922182","@type":"Researcher","foaf:name":[{"@language":"en","@value":"AOKI Hihumi"},{"@language":"ja","@value":"青木 一二三"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"レールウェイエンジニアリング・技術部"},{"@language":"en","@value":"Railway Engineering Corporation, Engineering Department"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"18806341"},{"@type":"LISSN","@value":"18806341"}],"prism:publicationName":[{"@language":"en","@value":"Japanese Geotechnical Journal"},{"@language":"ja","@value":"地盤工学ジャーナル"},{"@language":"en","@value":"Jiban Kogaku Janaru"},{"@language":"en","@value":"Jiban Kogaku Janaru (Japanese Geotechnical Journal)"},{"@language":"ja","@value":"地盤工学ジャーナル"}],"dc:publisher":[{"@language":"en","@value":"The Japanese Geotechnical Society"},{"@language":"ja","@value":"公益社団法人 地盤工学会"}],"prism:publicationDate":"2023-06-01","prism:volume":"18","prism:number":"2","prism:startingPage":"223","prism:endingPage":"238"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"https://www.jstage.jst.go.jp/article/jgs/18/2/18_223/_pdf"}],"availableAt":"2023-06-01","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=%E7%9B%B4%E6%8E%A5%E5%9F%BA%E7%A4%8E","dc:title":"直接基礎"},{"@id":"https://cir.nii.ac.jp/all?q=%E7%A0%82%E7%A4%AB%E5%B1%A4","dc:title":"砂礫層"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%8E%9F%E4%BD%8D%E7%BD%AE%E8%A9%A6%E9%A8%93","dc:title":"原位置試験"},{"@id":"https://cir.nii.ac.jp/all?q=%E5%B9%B3%E6%9D%BF%E8%BC%89%E8%8D%B7%E8%A9%A6%E9%A8%93","dc:title":"平板載荷試験"},{"@id":"https://cir.nii.ac.jp/all?q=shallow%20foundation","dc:title":"shallow foundation"},{"@id":"https://cir.nii.ac.jp/all?q=sandy%20gravel%20ground%20with%20coble%20stone","dc:title":"sandy gravel ground with coble stone"},{"@id":"https://cir.nii.ac.jp/all?q=in-situ%20test","dc:title":"in-situ test"},{"@id":"https://cir.nii.ac.jp/all?q=plate%20loading%20test","dc:title":"plate loading test"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1390862268821180416","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Study on stability of railway embankments depending on the scale of collapse by rainfall and loading tests"},{"@language":"ja","@value":"実物大鉄道盛土の降雨・載荷実験による崩壊規模に応じた安定性評価"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2010657902"},{"@type":"CROSSREF","@value":"10.3208/jgs.18.223"},{"@type":"OPENAIRE","@value":"doi_________::1794f88af56614e60ca5b624309983be"},{"@type":"CROSSREF","@value":"10.3208/jgs.19.101_references_DOI_P7gbX9TCQ35WBe283Av11wVa0mK"}]}