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Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)最新文献

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CHARACTERISTIC OF DYNAMIC BEHAVIOR FOR BURIED BEND WITH LIGHTWEIGHT THRUST RESTRAINT USING GEOGRIDS 土工格栅轻推力约束埋地弯道动力特性研究
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.23.133
T. Kawabata, Y. Sawada, Y. Mohri, Akira Izumi, M. Ariyoshi, T. Hirai, Kikuo Saitō
{"title":"CHARACTERISTIC OF DYNAMIC BEHAVIOR FOR BURIED BEND WITH LIGHTWEIGHT THRUST RESTRAINT USING GEOGRIDS","authors":"T. Kawabata, Y. Sawada, Y. Mohri, Akira Izumi, M. Ariyoshi, T. Hirai, Kikuo Saitō","doi":"10.5030/JCIGSJOURNAL.23.133","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.133","url":null,"abstract":"圧力管曲管部に発生するスラスト力に対して，一般的にコンクリートブロックが曲管部に打設される．しかしながら，地震時にコンクリートブロックが曲管部の大きな変位や，隣接管の離脱などを生じさせることが報告されている．その対策として，著者らはジオグリッドを用いた軽量スラスト防護工法を提案し，これまでに，水平載荷実験や実規模実験，数値解析などを行い，当提案工法がスラスト防護工法として十分有効であることが明らかとなった．しかしながら，当提案工法の耐震性は明らかにされていない．そこで本研究では，当提案工法の地震時挙動を明らかにし，耐震性を検討するために振動台実験を行った．実験結果から，液状化地盤において，曲管部に当工法を用いた場合，管の水平移動量が抑制され，また曲管部の離脱が抑制されることが確認された．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134614424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
REPARING METHOD USING A FLEXIBLE GEOMEMBRANE ON THE JOINT OF THE CONCRETE FACING TYPE RESERVOIR 采用柔性土工膜对混凝土面型水库接缝进行修补
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.23.253
Tomotake Kato, T. Kishimoto, M. Mori, Takehisa Mori, I. Natsuka
{"title":"REPARING METHOD USING A FLEXIBLE GEOMEMBRANE ON THE JOINT OF THE CONCRETE FACING TYPE RESERVOIR","authors":"Tomotake Kato, T. Kishimoto, M. Mori, Takehisa Mori, I. Natsuka","doi":"10.5030/JCIGSJOURNAL.23.253","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.253","url":null,"abstract":"近年，農業水利施設において，劣化などによる水利機能の低下が問題となっている．筆者らは，コンクリートフェーシング式貯水池の目地部を対象とし，ジオメンブレンを活用した補修工法の開発を行っている．本工法は，従来の表面遮水工法と異なり，目地部にのみジオメンブレンを敷設するため，使用材料を最小限に抑えることができ，経済性および施工性に優れる．しかし一方で，目地両端部分にジオメンブレンと躯体との接合が連続的に発生することから，止水性に課題がある．この課題を解決すべく，本工法では，シール材を躯体表面とジオメンブレンの間に配置し，止水性の向上を図った．本報は，要求性能を想定した各種性能評価の概要および試験結果，ならびにシール材の相違による本工法の諸性能への影響についてとりまとめたものである．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124340614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CENTRIFUGE TESTS ON SEISMIC STABILITY OF THE DAMAGED GEOGRID REINFORCED SOIL WALL 破坏土工格栅加筋土墙地震稳定性离心试验
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.25.197
N. H. Giang, J. Kuwano, J. Izawa, S. Seki
{"title":"CENTRIFUGE TESTS ON SEISMIC STABILITY OF THE DAMAGED GEOGRID REINFORCED SOIL WALL","authors":"N. H. Giang, J. Kuwano, J. Izawa, S. Seki","doi":"10.5030/JCIGSJOURNAL.25.197","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.25.197","url":null,"abstract":"Recent huge earthquakes have caused severe and small damage to a number of geogrid-reinforced soil walls. For proper repair or reconstruction, it is necessary to evaluate degree of damage of those structures. In this research, the pullout test of geogrid subjected to the unloading-reloading process was carried out to learn its effects on the pullout resistance. The results were then used to evaluate the factor of safety and sliding surface of the damaged geogrid reinforced soil wall. GRSW models in centrifuge shaking and tilting table tests under 50G were performed. The damaged GRSW models were first achieved by both shaking and tilting. The damaged GRSW were then subjected to unloading-reloading process until the full collapse occurred. The pullout peak value and residual value using in current design of GRSW were also discussed.","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122718028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DYNAMIC CENTRIFUGE MODEL TEST ON PILED GEO-WALL 桩式土工墙动态离心模型试验
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.24.257
T. Hara, S. Tsuji, A. Yashima, N. Tatta
{"title":"DYNAMIC CENTRIFUGE MODEL TEST ON PILED GEO-WALL","authors":"T. Hara, S. Tsuji, A. Yashima, N. Tatta","doi":"10.5030/JCIGSJOURNAL.24.257","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.24.257","url":null,"abstract":"","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115377007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
WATERTIGHT EMBANKMENT USING L-SHAPED GEOSYNTHETIC DRAIN 水密路堤采用l形土工合成排水
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.23.139
K. Hara, S. Shibuya, M. Saito, N. Torii, J. Chae, T. Masuo
{"title":"WATERTIGHT EMBANKMENT USING L-SHAPED GEOSYNTHETIC DRAIN","authors":"K. Hara, S. Shibuya, M. Saito, N. Torii, J. Chae, T. Masuo","doi":"10.5030/JCIGSJOURNAL.23.139","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.139","url":null,"abstract":"近年，豪雨による盛土構造物の変状や崩壊による災害が多発している．盛土背部や地山から浸透する雨水が盛土内に浸入することにより飽和領域が拡大し，サクションの低下により土の剛性および強度がともに減少することが原因と考えられる．したがって，この種の地盤災害軽減のためには，盛土内および周辺への雨水の浸入を許さないことが重要である．本研究では，盛土構造物を囲むようにジオシンセティックス排水材をL型に配置し，鉛直に設置した排水材で受けた浸透水を盛土底部に水平に設置した排水材に流すことにより盛土外へ速やかに排水させる方法を考案し，この手法による盛土防水効果を不飽和浸透流数値シミュレーションにより定量的に評価している．また，神戸市六甲山系で採取したまさ土を用いた模型実験結果と解析結果を詳細に比較検討することにより，提案する数値シミュレーション手法の工学的適用性を検証している．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126816956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A few considerations of pullout test characteristics of geogrid reinforced sand using DEM analysis 用DEM分析土工格栅加筋砂拉拔试验特性的几点思考
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.22.103
Jun Zhang, N. Yasufuku, H. Ochiai
{"title":"A few considerations of pullout test characteristics of geogrid reinforced sand using DEM analysis","authors":"Jun Zhang, N. Yasufuku, H. Ochiai","doi":"10.5030/JCIGSJOURNAL.22.103","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.22.103","url":null,"abstract":"Pullout tests are effective to investigate the interaction mechanism along the interface in geogrid reinforced zone. Micro scale geogrid-soil interactions are one of the fundamental important issues in pullout test response as well as actual field behavior of earth reinforcement. Hence, the discrete element analysis is carried out for pullout test from a micro point of view. The discrete element model is conducted to investigate the pullout response paying attention to compaction effect linked with porosity. The specimen is investigated in different porosities in order to evaluate the influence of degree of compaction on the strength, linked with the interface microscopic behavior. And the dilatancy predicted in the model may also provide useful information on the increase of the interface shear resistance.","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127722913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Soil-Geogrid Interaction Behavior under Wet Condition 湿润条件下土-土工格栅相互作用特性
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.23.31
Jun Zhang, N. Yasufuku
{"title":"Soil-Geogrid Interaction Behavior under Wet Condition","authors":"Jun Zhang, N. Yasufuku","doi":"10.5030/JCIGSJOURNAL.23.31","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.31","url":null,"abstract":"Heavy rainfall is considered to be the main cause of the slope failures that cause collapse catastrophically without prior warning. Therefore in order to investigate the effect of rainfall on the stability of geogrid reinforced soil structures, this paper presents the result from a series of pullout tests for investigating interface behavior between soil and geogrid. By varying the water content of soil sample, the interaction behavior is determined by carrying out pullout tests in a displacement-rate controlled manner. The main test results obtained are presented, followed by discussion on the shear behavior of the soil-geogrid interface considering the effect of moisture content. It is shown that the normal stress level and interface water presence dominate the shear behavior of the soil-geogrid interface in the pullout tests.","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127515413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
MECHANISM AND ESTIMATION OF TENSILE-REINFORCING EFFECTS IN THE DIRECT SHEAR TEST 直剪试验中抗拉增强效应的机理及评价
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.23.15
K. Matsushima, Po-kai Wu, Y. Mohri, F. Tatsuoka
{"title":"MECHANISM AND ESTIMATION OF TENSILE-REINFORCING EFFECTS IN THE DIRECT SHEAR TEST","authors":"K. Matsushima, Po-kai Wu, Y. Mohri, F. Tatsuoka","doi":"10.5030/JCIGSJOURNAL.23.15","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.15","url":null,"abstract":"土の一様なひずみに起因する補強材引張力は常に補強材面に沿った摩擦力が作用するが，不連続な変位に起因する補強材引張力は摩擦力だけでなく補強材面に垂直な力が土に作用する．直接せん断(DS)試験では土のひずみよりも不連続な変位に起因する引張り補強効果が強度発現の主因となるため，土の摩擦力との釣合いを基本とするせん断強度の推定式では試験結果をうまく説明できない．そこで，本研究では，不連続な変位場で表れる力の釣合いをモデル化したせん断強度の推定式を提案し，補強土のDS 試験結果と比較した．その結果，提案式では引張力の発達分布の違いによる補強効果の差を表現でき，せん断強度を適切に評価できることがわかった．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"288 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123452959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FUNDAMENTAL STUDY OF REINFORCEMENT METHOD USING GEO-TEXTILES FOR EXISTING OIL STRAGE TANKS 土工织物加固既有储油罐方法的基础研究
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.25.71
T. Satoh, Akinori Hazama, N. Tsuruyama, Yuta Satoh, Kumiko Suzuki, K. Kaneko, K. Kumagai
{"title":"FUNDAMENTAL STUDY OF REINFORCEMENT METHOD USING GEO-TEXTILES FOR EXISTING OIL STRAGE TANKS","authors":"T. Satoh, Akinori Hazama, N. Tsuruyama, Yuta Satoh, Kumiko Suzuki, K. Kaneko, K. Kumagai","doi":"10.5030/JCIGSJOURNAL.25.71","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.25.71","url":null,"abstract":"1 学生会員,八戸工業大学大学院工学研究科,修士課程(〒031-8501八戸市大字妙字大開88-1) 2 正会員,三菱樹脂 (株),土木資材事業部技術開発グループ(〒103-0021東京都中央区日本橋本石町1-2-2) 3 非会員,三菱化学エンジニアリング (株),建築・ファシリティ事業部(〒108-0023東京都港区芝浦4-2-8) 4 学生会員,八戸工業大学大学院工学研究科,修士課程(〒031-8501八戸市大字妙字大開88-1) 5 非会員,八戸工業大学大工学部,博士研究員(〒031-8501八戸市大字妙字大開88-1) 6 正会員,八戸工業大学大学院工学研究科,准教授(〒031-8501八戸市大字妙字大開88-1) 7 正会員,八戸工業大学大学院工学研究科,教授(〒031-8501八戸市大字妙字大開88-1) 在各建築法令が改訂されているなか,比較的重要度の低 い既存の建築・土木構造物に対しては,より安価で簡易 な液状化被害を低減する工法が求められている. 本研究では既設のオイルタンク基礎を対象として,支 持力補強と液状化被害の低減を兼ねた比較的簡易な工法 として,耐久性,強度特性,施工性にすぐれたジオテキ スタイル(ジオグリッド)を使用した新しい工法につい て検討する.本工法の概念を図–1に示す.構造物直下の 地盤をジオテキスタイルを縦方向に使って囲むことで, 支持力向上と液状化時の沈下抑制を図る.上部は基礎と 補強材を結合することで,また,下部については支持層 に根入れすることで補強材は拘束されている.構造物基 礎が沈下する際に縦方向に挿入されたジオテキスタイル を引張り,構造物直下の地盤が側方に変位しようとする 際に円周方向に補強材が力を発揮する.これらのことに よりジオテキスタイルが引張材として機能し効果を発揮 すると考えられる.なお,本工法の目的は完全に液状化 を防ぐことを目指しているのではなく,中規模の地震に より液状化が発生した場合にも上部の構造物の完全な崩 壊を防ぐことである.本論文では,このような簡易な既 設基礎の補強工法について,静的な支持力試験を行って その効果や基本的構造について検討を行う.さらに,液 状化時の挙動を検討するために,振動台模型実験を行い, その沈下抑制効果についても確認する. なお,本工法の開発に際して,ジオテキスタイルを地 盤中に縦方向に挿入するための手法についても現在検討 を継続中であるが,ジオテキスタイルを地盤中に縦に挿 入可能であることを実物を用いて確認している.","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121670811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lateral loading model tests for buried pipe against thrust force backfilled with liquefied stabilized soil 液化稳定土回填地埋管抗推力横向加载模型试验
Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal) Pub Date : 1900-01-01 DOI: 10.5030/JCIGSJOURNAL.24.171
T. Kawabata, Ayumu Kashiwagi, Y. Mohri, Satoshi Okuno
{"title":"Lateral loading model tests for buried pipe against thrust force backfilled with liquefied stabilized soil","authors":"T. Kawabata, Ayumu Kashiwagi, Y. Mohri, Satoshi Okuno","doi":"10.5030/JCIGSJOURNAL.24.171","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.24.171","url":null,"abstract":"近年，埋設パイプライン施工時の埋戻しに際して，流動化処理土を用いる事例が増加している．本論では，スラスト力が作用する曲管部の受働側地盤における埋戻し材に流動化処理土を使用するとともに，その中に補強材を敷設することにより，受働抵抗力増加を図る新たなスラスト防護工法を提案し，口径260mmの模型パイプを使用した水平載荷模型実験を実施した．計測項目は，パイプに作用する水平荷重，パイプの水平変位である．実験結果より，補強材が，流動化処理土の有する脆性的な性質を改善し，受働抵抗力増加に寄与することがわかった．また，補強材の種類が受働抵抗力の増減に影響を与えることが明らかとなった．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128284864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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