{"title":"PREDICTION MODEL OF REINFORCEMENT LOADS FOR GEOGRID REINFORCED SOIL WALLS WITH FACING BATTER","authors":"Y. Miyata, R. Bathurst","doi":"10.5030/JCIGSJOURNAL.23.195","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.195","url":null,"abstract":"本文は，壁面が勾配を有するジオシンセティックス補強土壁における補強材力の推定法について論じる．これまで著者らは，北米で開発された砂質土を用いたジオシンセティックス補強土壁の補強材力の推定法を，粘着力を有するケースに適用できるように拡張してきた．本文では，壁面勾配の異なる補強土壁についてケーススタディを行い，その影響を考慮した補強材力の推定法について論じる．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"28 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":"116861961","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}
Pub Date : 1900-01-01DOI: 10.5030/JCIGSJOURNAL.23.95
T. Tachibana, Takumi Tsushima, K. Kaneko, Masanobu Horie, K. Kumagai
The geo-cell reinforced wall method that attempts the stabilization of the slope is developed, and it has come to be used domestically in recent years. The usage is to make the retaining wall structure that puts the filling in the honeycomb cell frame made of the high density polyethylene resin and piles it up. In this study, we carried out the shaking table tests to discuss the dynamic stability of the geocell-reinforced soil wall at the earthquake. As the results, we can understand the dynamic failure mechanisms and stability of geo-cell reinforced soil walls.
{"title":"SHAKING TABLE TESTS OF GEOCELL-REINFORCED SOIL WALL","authors":"T. Tachibana, Takumi Tsushima, K. Kaneko, Masanobu Horie, K. Kumagai","doi":"10.5030/JCIGSJOURNAL.23.95","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.95","url":null,"abstract":"The geo-cell reinforced wall method that attempts the stabilization of the slope is developed, and it has come to be used domestically in recent years. The usage is to make the retaining wall structure that puts the filling in the honeycomb cell frame made of the high density polyethylene resin and piles it up. In this study, we carried out the shaking table tests to discuss the dynamic stability of the geocell-reinforced soil wall at the earthquake. As the results, we can understand the dynamic failure mechanisms and stability of geo-cell reinforced soil walls.","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":"120997565","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}
{"title":"Development of a procedures to evaluate earthquake-induced residual displacements of geosynthetics reinforced soil retaining wall and its application to case history","authors":"S. Nakajima, J. Koseki, Kenji Watanabe, M. Tateyama","doi":"10.5030/JCIGSJOURNAL.23.201","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.23.201","url":null,"abstract":"模型振動台実験における補強土壁の地震時挙動を反映して，支持地盤及び背面盛土の地盤変形の影響を考慮したジオグリッド補強土擁壁の地震時変位量計算手法を構築し，過去に実施した模型振動台実験の再現解析を実施した．提案手法では，地盤変形の影響を考慮することによって，剛体釣り合いを想定したNewmark法では考慮できない低加速度レベルから生じる変位量増分を評価することが出来る．提案手法を既往の補強土壁に関する振動台実験に適用した結果，計算値と実測値は比較的良好に一致した．また，提案手法の実物大構造物への適用性を検証するために，兵庫県南部地震において被災した補強土壁の実被害事例解析も行った．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"27 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":"129140808","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}
{"title":"LAYING EFFECT OF BREATHABLE . WATER PROOF SHEET ON RIVER DIKE CONSIDERING HEAVY RAIN AND AIR BUBBLE","authors":"K. Maeda, Satoshi Shibata, Kanji Baba, T. Masuo, T. Imase","doi":"10.5030/JCIGSJOURNAL.25.107","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.25.107","url":null,"abstract":"局所的な集中豪雨による河川堤防の損傷には，堤防表層部から浸透水による堤体の飽和化と堤体内浸潤線の上昇に伴う間隙空気のブローが関与していることが数値解析で想定されている．都市が発達する下流部の河川堤防は軟質な細粒分の多い砂質土から構成され，堤体内に封入された間隙空気による堤防の損傷を受けやすいと考えられている．本論文では，降雨発生装置を備えた模型堤防実験により，降雨浸透や河川水位の上昇に伴う間隙空気塊の挙動を把握した．無体策の堤体では降雨浸透や河川水位の上昇により空気圧の上昇やブロー現象が確認できた．遮水シートによる浸透防止対策工ではシート下位の間隙空気圧が上昇した．また，透気性のある遮水シート施工時は降雨浸透防止効果と間隙空気圧の上昇軽減効果が確認できた．","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":"127944467","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}
Pub Date : 1900-01-01DOI: 10.5030/JCIGSJOURNAL.24.193
J. Chai, C. Ong
Laboratory large-scale model (length: 1.50m, width: ~0.62m, height: 0.85m) tests and finite element analyses (FEA) were conducted to investigate the deformation characteristics of soft clayey ground under the combination of vacuum pressure and surcharge load. Both the model test and FEA results indicate that the combination of vacuum pressure with surcharge load can reduce the lateral displacement of the model ground. The outward lateral displacement increases with the increase of the loading rate (LR) of surcharge load and the ratio of surcharge load to vacuum pressure (RL). The results also indicate that by adjusting LR and RL, the lateral displacement of the ground can be minimized.
{"title":"GROUND DEFORMATION INDUCED BY COMBINATION OF VACUUM PRESSURE AND SURCHARGE LOAD","authors":"J. Chai, C. Ong","doi":"10.5030/JCIGSJOURNAL.24.193","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.24.193","url":null,"abstract":"Laboratory large-scale model (length: 1.50m, width: ~0.62m, height: 0.85m) tests and finite element analyses (FEA) were conducted to investigate the deformation characteristics of soft clayey ground under the combination of vacuum pressure and surcharge load. Both the model test and FEA results indicate that the combination of vacuum pressure with surcharge load can reduce the lateral displacement of the model ground. The outward lateral displacement increases with the increase of the loading rate (LR) of surcharge load and the ratio of surcharge load to vacuum pressure (RL). The results also indicate that by adjusting LR and RL, the lateral displacement of the ground can be minimized.","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"37 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":"133874007","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}
{"title":"SEISMIC LIFE CYCLE COST ANALYSIS OF GEOSYNTHETICS REINFORCED AND UNREINFORCED EARTH SLOPE","authors":"M. Shinoda, Y. Miyata, T. Yonezawa, Jun-ichi Hironaka","doi":"10.5030/JCIGSJOURNAL.25.189","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.25.189","url":null,"abstract":"本論文は，超一様分布列を用いたモンテカルロ法により，無補強盛土と補強盛土の地震時変形量を算定し，その結果を用いた地震時のライフサイクルコストについて述べたものである．コストの算定は，積算して求めた初期建設費と想定した復旧方法による復旧費から試算した．地震時ライフサイクルコストを算定した結果，無補強盛土より補強盛土のほうがライフサイクルコストが低いことが分かった．ライフサイクルコストを用いることにより，初期建設費だけではなく，その後の復旧費の影響を考慮した構造物の地震時安定性を合理的に評価できることを示した．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"9 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":"131654715","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}
{"title":"CHARACTERISTICS OF CONSOLIDATION AND TRIAXIAL SHEARING ON LIQUEFIED STABILIZED SOIL REIFORCED BY FIBERED MATERIAL","authors":"Giang C. Nguyen, Y. Kohata, M. Katagiri, Tatsuro Okubo","doi":"10.5030/JCIGSJOURNAL.24.97","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.24.97","url":null,"abstract":"現在, ベトナム，ハノイ市では，交通渋滞の解決を目的とした地下鉄，地下駐車場，地下歩道，地下街の建設など多くの都市地下開発が計画されている．しかしながら，ハノイ市域における地下構造物の建設に伴う地盤の力学的性質は未解明な部分が多い．また，ハノイ市域は，軟弱な粘土地盤が厚く堆積していることが多く，圧密沈下が発生しやすいことから，より強固な地盤に改良する必要がある．そこで，本研究では，近年，埋戻し材としてよく用いられるようになってきた流動化処理土を繊維質材で補強し，その圧密・せん断特性を評価するために，一連の段階載荷による圧密試験，および圧密非排水三軸圧縮試験を実施した．その結果，流動化処理土に繊維質材を添加すると，1) 圧密降伏応力が増加すること， 2) 繊維質材の補強効果により脆性的な性質が改善され，沈下抑制効果が大きくなること，などの知見が得られた．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"19 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":"132945264","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}
{"title":"Deformability and settlement reduction characteristics of strip foundation composed by the layers of geo-textiles on the urethane ground model","authors":"M. Fukuda, Zyoji Nishiura, H. Nishi, Tomohiro Yamazaki, Akinori Hazama, Yutaka Shimada, K. Kumagai","doi":"10.5030/JCIGSJOURNAL.25.39","DOIUrl":"https://doi.org/10.5030/JCIGSJOURNAL.25.39","url":null,"abstract":"ジオセル構造の開発と設計条件を整理するためにウレタンによる地盤モデルと数種類の剛性と厚さが異なるジオテキスタイルを使用した基礎実験を行った．ウレタン地盤モデルのモデルとしての適切性を調べたあと，ジオテキスタイルで直接基礎を模擬し，敷設方法，重ね方などの効果を簡易な実験により確認した．着目した現象は最大変形量と沈下形状であり，ジオテキスタイルの剛性や重ね方による沈下性状への影響を調べた．さらにこの実験結果をジオセルの開発に発展させるために弾性論を使用してジオセルの剛性や構造を調べる目的で概略的な解析を行った．本論文では実験結果と解析結果を示す．さらにこうした実験結果を踏まえてジオセル構造の開発方向を展望する．","PeriodicalId":165094,"journal":{"name":"Jioshinsetikkusu Rombunshu (geosynthetics Engineering Journal)","volume":"7 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":"128828398","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}
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