{"created":"2025-06-11T23:59:33.073919+00:00","id":2000339,"links":{},"metadata":{"_buckets":{"deposit":"87539722-eb09-4e95-aaaa-c8d0519e721f"},"_deposit":{"created_by":20,"id":"2000339","owner":"20","owners":[20],"pid":{"revision_id":0,"type":"depid","value":"2000339"},"status":"published"},"_oai":{"id":"oai:muroran-it.repo.nii.ac.jp:02000339","sets":["41:227"]},"author_link":[],"item_81_date_granted_17":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2025-03-24"}]},"item_81_degree_grantor_10":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_language":"ja","subitem_degreegrantor_name":"室蘭工業大学"}],"subitem_degreegrantor_identifier":[{"subitem_degreegrantor_identifier_name":"10103","subitem_degreegrantor_identifier_scheme":"kakenhi"}]}]},"item_81_degree_name_11":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）","subitem_degreename_language":"ja"}]},"item_81_description_7":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"地盤工学において，透水性は重要な役割を果たしており，土構造物の強度，変形，および長\n期的な性能に直接影響する．流動化処理土（LSS）は持続可能な埋め戻し材として大きな注目を\n集めているが，低透水性を必要とするプロジェクトでの適用に関する研究はまだ限られている．\n本研究は，低透水性裏込め材としての適性を評価するため，一連の一次元圧密・透水試験を実\n施し，LSS の圧密・透水特性を検討したものである．試験条件は，スラリー密度を1.216，1.280，\n1.344 g/cm³，セメント添加量を100 kg/m³，繊維材添加量を0 および10 kg/m³，養生期間を\n7，28，56，120 日とした．\n本研究では，異なる泥水密度で作製されたLSS の圧密・透水特性を比較するとともに，繊維\n材混合の影響を検討した．その結果，LSS の圧密係数は，泥水密度および繊維材の混合量に伴い\n増加すること，特に泥水密度が主要な影響因子であることが示された．繊維材の混合量は，圧\n密係数に比較的小さい影響を及ぼす一方で，LSS の圧密係数は，圧密圧力の増加とともに全体\n的に減少し，圧密降伏応力に対応する明確な変曲点が示された．また，LSS の透水係数は，泥水\n密度，繊維材の混合量，および供試体の初期間隙比と密接に関連しており，泥水密度および繊\n維材の混合量が増加することで透水係数が著しく低下することが明らかとなった．LSS の透水\n係数に及ぼす繊維材の影響は相対的に小さいものの，繊維材の混合によりLSS の遮水性が向上\nすることが示された．本研究において， LSS の平均透水係数は約3×10⁻⁶ cm/s であり，高い\n遮水性を有することが示された．\nさらに，養生期間がLSS の圧密および透水特性に与える重要な影響が示された．本研究では，\nNSF-Clay を母材とするLSS において，養生期間が長くなるにつれて圧密係数が増加し，透水係\n数が減少する傾向が見られた．LSS の圧密係数は圧力の増加とともに全体的に減少するが，こ\nの減少は養生期間が長いほど顕著であり，繊維材の影響は比較的小さいものであった．一方で，\nLSS の透水係数は圧密圧力の増加に伴い減少し，9.8〜1256 kN/m²の圧力範囲で1〜2 桁低下す\nる傾向が見られた．繊維材と比較して，養生期間はLSS の透水性により大きな影響を及ぼすこ\nとが明らかにされた．\nまた，本研究ではLSS と母材であるNSF-Clay の圧密および透水特性を比較・検討した結果，\nLSS はNSF-Clay に比べて大きな圧密係数，小さい透水係数，および安定した間隙比を示すこと\nが明らかとなった．これは，セメント系固化材の添加により，軟弱粘土のマトリックス内の粒\n子配列が大きく変化し，より密なLSS 構造が形成されるためと考えられる．\n結論として，本研究はLSS を圧密および透水特性に関する地盤工学に応用するための実験的\nな知見を提供するとともに，今後の研究の基盤を築いた．今後の研究では，繊維材の長さが圧\n密および透水特性，さらにはLSS の全体的な力学特性に与える影響を評価し，工学的応用にお\nける性能をさらに最適化することに焦点を当てる必要がある．","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"Permeability plays a crucial role in geotechnical engineering, directly affecting\nthe strength, deformation, and long-term performance of soil structures. Liquefaction\nstabilized soil (LSS) is of great interest as a sustainable backfill material, but\nresearch on its application in projects requiring low permeability is still limited.\nThis study discusses the consolidation and permeability property of LSS conducted to\na series of 1-D consolidation and permeability tests to assess its suitability as a\nlow-permeability backfill material. Test conditions were set at slurry densities of\n1.216, 1.280, and 1.344 g/cm³, cement content of 100 kg/m³, fiber content of 0 and 10\nkg/m³, and curing periods of 7, 28, 56, and 120 days.\nIn this study, the consolidation and permeability characteristics of LSS at\ndifferent slurry densities and the effect of fiber addition were investigated. Based\non the test results, it is found that the coefficient of consolidation of LSS increases\nsignificantly depending on both slurry density and fiber content. Especially, the\neffect of slurry density is considered the primary influencing factor. The overall\ntrend of LSS’s coefficient of consolidation decreased with increasing pressure with\na notable inflection point corresponding to the consolidation yield stress. On the\nother hand, it is revealed that the coefficient of permeability of LSS is closely\nrelated to slurry density, fiber content, and the initial void ratio of the specimens.\nThat is, as slurry density and fiber content increase, the coefficient of permeability\ndecreases significantly. And while fiber content has a relatively minor influence\namong these factors, adding fiber enhances LSS’s impermeability. In this study, the\naverage coefficient of permeability of LSS was approximately 3×10⁻⁶ cm/s, indicating\nhigh impermeability.\nMoreover, in this study, it is revealed that the significant influence of curing\ntime on the consolidation and permeability properties of LSS made by NSF-Clay as base\nmaterial. The coefficient of consolidation increases with curing time, while the\ncoefficient of permeability decreases. Permeability decreases by one to two orders of\nmagnitude within a pressure range of 9.8 to 1256 kN/m², with curing time exerting a\nmore significant influence than fiber content.\nThis study also compared the consolidation and permeability properties of LSS with\nthose of the base material, NSF-Clay, and it is found that LSS exhibits a higher\ncoefficient of consolidations, lower coefficient of permeability, and a stable void\nratio compared to NSF-Clay. The addition of a cement stabilizer significantly alters\nthe internal particle arrangement within the soft clay matrix, resulting in a denser\nLSS structure.\nIn conclusion, this study not only provides experimental knowledge for the\napplication of LSS in geotechnical engineering related to consolidation and\npermeability property but also lays a foundation for future research. Future studies\nshould focus on evaluating the effects of various fiber lengths on the consolidation\nand permeability properties and the overall mechanical behavior of LSS to further\noptimize its performance in engineering applications.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_81_dissertation_number_13":{"attribute_name":"学位授与番号","attribute_value_mlt":[{"subitem_dissertationnumber":"甲第543号"}]},"item_81_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15118/0002000339","subitem_identifier_reg_type":"JaLC"}]},"item_81_text_12":{"attribute_name":"学位の種別","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"課程博士"}]},"item_81_text_14":{"attribute_name":"報告番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"甲第543号"}]},"item_81_text_15":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"博甲第543号"}]},"item_81_text_16":{"attribute_name":"研究科・専攻","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"工学研究科"}]},"item_81_version_type_24":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"室蘭工業大学","affiliationNameLang":"ja"},{"affiliationName":"Muroran Institute of Technology","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"Xi, Bingyu","creatorNameLang":"en"}],"familyNames":[{"familyName":"Xi","familyNameLang":"en"}],"givenNames":[{"givenName":"Bingyu","givenNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2025-06-11"}],"filename":"A543.pdf","filesize":[{"value":"3.9 MB"}],"format":"application/pdf","url":{"objectType":"fulltext","url":"https://muroran-it.repo.nii.ac.jp/record/2000339/files/A543.pdf"},"version_id":"fc23653b-80a2-4dd7-919c-9ddcde7b4b8f"},{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2025-06-11"}],"filename":"A543_summary.pdf","filesize":[{"value":"93 KB"}],"format":"application/pdf","url":{"objectType":"abstract","url":"https://muroran-it.repo.nii.ac.jp/record/2000339/files/A543_summary.pdf"},"version_id":"54dba490-0ef7-478f-822d-1a15c0145bc1"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_title":"Experimental Study on Consolidation and Permeability Characteristics of Liquefied Stabilized Soil","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Experimental Study on Consolidation and Permeability Characteristics of Liquefied Stabilized Soil","subitem_title_language":"en"},{"subitem_title":"流動化処理土の圧密及び透水特性に関する実験的研究","subitem_title_language":"ja"}]},"item_type_id":"81","owner":"20","path":["227"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2025-06-11"},"publish_date":"2025-06-11","publish_status":"0","recid":"2000339","relation_version_is_last":true,"title":["Experimental Study on Consolidation and Permeability Characteristics of Liquefied Stabilized Soil"],"weko_creator_id":"20","weko_shared_id":-1},"updated":"2025-06-12T00:07:36.907679+00:00"}