{"created":"2023-05-15T15:16:58.458200+00:00","id":2968,"links":{},"metadata":{"_buckets":{"deposit":"152b1b1a-2f63-452b-aa44-3889b6d55f3b"},"_deposit":{"created_by":12,"id":"2968","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"2968"},"status":"published"},"_oai":{"id":"oai:obihiro.repo.nii.ac.jp:00002968","sets":["242:243"]},"author_link":["285"],"item_6_alternative_title_1":{"attribute_name":"その他（別言語等）の研究課題名","attribute_value_mlt":[{"subitem_alternative_title":"CONTROL METHOD ANALYSIS ON FROST HEAVE WITH GEOTEXTILES AS THE EFFECT OF CAPILLARY BREAKS IN SOILS","subitem_alternative_title_language":"en"}]},"item_6_description_10":{"attribute_name":"研究代表者番号","attribute_value_mlt":[{"subitem_description":"30003130","subitem_description_type":"Other"}]},"item_6_description_11":{"attribute_name":"研究機関","attribute_value_mlt":[{"subitem_description":"帯広畜産大学","subitem_description_type":"Other"}]},"item_6_description_13":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"寒冷地における道路建設が延びるに従い、その工事費における凍上対策の占める割合は増加してきている。道路の凍上防止対策は、路床土を非凍上性の物質に置き換える置換工法がほとんどを占めるが、現地発生土の利用した対策が望まれている。あるジオテキスタイルが毛管遮断効果を示し、凍上を抑制することが近年判明した。この遮水工法を実用化するため、数種のジオテキスタイルを用いて、毛管遮断のメカニズムを明らかにする室内試験と3年間を通した野外試験とを行った。\n遮水効果の簡単な評価を行うために、毛管上昇試験を行った。ジオテキスタイルは供試土の中間に敷設し、水頭はその位置に設定した。結果は、保水性が大きく凍土性の大きい火山灰土を使用するときのみ、ジオテキスタイル遮水能力が明白に判別できることが分かった。\n室内凍上試験は、供試体を凍結セルに入れて、上端を-6℃の一定温度で冷却し、下端+4℃の一定温度に保った。結果として、2種類の厚いジオテキスタイルは、毛管上昇移動水を遮断する効果を発揮し、凍上を半分以下に抑制した。それらは、厚さが7.5mmから10.0mmであり、ポリエステル繊維の三重構造シート(コスモレベル)と樹脂で接着したポリエステル繊維のマット構造(サンドフ)であった。しかし、薄手のタイプのジオテキスタイル(テクトン)は、凍上抑制効果が認められなかった。野外試験では、3年間の冬季に渡って行われた。水位を一定に保ち、火山灰性砂質土を挿入した数個のライシメータと称する野外土層を使用し、地表から下120cmの所に一定地下水位を維持した。ジオテキスタイルは、地下水位と土の最大凍結侵入深さの間に敷設された。コスモレベルとサンドフは、3年間を通して安定した凍上抑制効果を発揮した。以上の結果から、凍上対策におけるジオテキスタイル遮水工法は有力な工法であり、現在のところ厚手のジオテキスタイル使用が最も有効であると判断される。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"In order to develop the method of capillary breaks for the practical use, the laboratory experiments to prove the mechanism were conducted using several geotextiles, and field investigation was also carried out during three winters. The capillary rise experiment was first conduced to evaluate the potential of the several geotextiles. Then each geotextile was emplaced at mid-height in the soil column and water level was maintained at the same position. If a volcanic ash soil with high retention and high frost susceptivity was used, the potential of geotextiles was recognized for the effect of capillary breaks. In laboratory frost heave tests, the specimen was kept on the bottom at 4 C and was frozen from the too at -6 C.Consequently two kinds of thick geotextiles interpreted the uptake of water and indicated the effect of frost heave reduction by amounts below 50 percent. They were polyester geotextiles with three-layred structure and resin-bonding mat-shaped fabric, ranging from 7.5 mm to 10 mm in thickness. Some thin geotextiles did not show the effect of the reduction on frost heave. The field experiment was performed with several lysimeters under the constant water level conditions that was maintained at the 120 cm deep from the surface during three winters. The geotextiles were installed between the maximum frost penetration depth and the groundwater level. thick geotextiles, the same kinds used in the laboratory tests showed to be durable to reduce frost heave through three winters. In conclusion, it appears likely that the method of capillary breaks with geotextiles is significant for the remedies of frost heave control and the polyester geotextiles with thick structure were most effective to mitigate frost heave in soils.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_6_description_14":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"平成4,5年度科学研究費補助金(一般研究(C)萌)研究成果報告書","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_6_description_19":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_6_description_9":{"attribute_name":"研究課題番号","attribute_value_mlt":[{"subitem_description":"04806033","subitem_description_type":"Other"}]},"item_6_text_12":{"attribute_name":"助成元","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"科学研究費助成事業"}]},"item_6_version_type_20":{"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_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-01-30"}],"displaytype":"detail","filename":"H6tutiya.pdf","filesize":[{"value":"13.2 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"H6tutiya.pdf","url":"https://obihiro.repo.nii.ac.jp/record/2968/files/H6tutiya.pdf"},"version_id":"6f6cca79-96ae-4e5d-a336-8559efc9e272"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_researcher":{"attribute_name":"研究代表者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Tsuchiya, Fujio","creatorNameLang":"en"},{"creatorName":"土谷, 富士夫","creatorNameLang":"ja"}],"familyNames":[{"familyName":"Tsuchiya","familyNameLang":"en"},{"familyName":"土谷","familyNameLang":"ja"}],"givenNames":[{"givenName":"Fujio","givenNameLang":"en"},{"givenName":"富士夫","givenNameLang":"ja"}],"nameIdentifiers":[{"nameIdentifier":"285","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"1000030003130","nameIdentifierScheme":"CiNii ID","nameIdentifierURI":"http://ci.nii.ac.jp/nrid/1000030003130"},{"nameIdentifier":"30003130","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=30003130"},{"nameIdentifier":"read0167522","nameIdentifierScheme":"researchmap","nameIdentifierURI":"https://researchmap.jp/read0167522"}]}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"ジオテキスタイルの毛管遮断効果を使用した土の凍上抑止法の解析","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ジオテキスタイルの毛管遮断効果を使用した土の凍上抑止法の解析","subitem_title_language":"ja"}]},"item_type_id":"6","owner":"12","path":["243"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2007-02-15"},"publish_date":"2007-02-15","publish_status":"0","recid":"2968","relation_version_is_last":true,"title":["ジオテキスタイルの毛管遮断効果を使用した土の凍上抑止法の解析"],"weko_creator_id":"12","weko_shared_id":-1},"updated":"2024-07-02T03:26:20.586548+00:00"}