{"title":"Behavior of shallow foundation of bridge on block type and contact column type cement treated soil","authors":"S. Tanimoto, T. Kouno, Hiroshi Sato, M. Shirato, S. Nakatani","doi":"10.3208/JGS.5.309","DOIUrl":"https://doi.org/10.3208/JGS.5.309","url":null,"abstract":"橋梁はトップヘビーであり，死荷重のみならず基礎底面に作用する転倒モーメントも大きい。さらに，用地の制約が大きく，基礎の平面寸法が小さい上に上部構造も含んだ系全体としての挙動を考える必要がある。また，橋梁の直接基礎を固化体に支持させる場合には，供用期間中に交通荷重や地震荷重などが繰返し作用することから，繰返し荷重が基礎および固化体の挙動に与える影響を考慮する必要がある。本研究においては，このような繰返し荷重を考慮した固化体の許容応力と固化体の集合体の基本的な挙動や破壊特性の把握を目的として実施した要素実験と遠心力模型実験結果について報告する。その結果，常時·レベル1地震時で設計されたブロック式固化体は最大耐力を超えても顕著な耐力の低下は見られず，残留変位も小さいことがわかった。これに対し，接円式固化体については，交番繰返し載荷時に過大な沈下が生じ，ブロック式固化体の挙動とは明瞭な相違がみられた。","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"71 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":"122399571","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}
The steel pipe piles with wings installed in soil cement developed in Japan and Vietnam are composite foundation piles made of steel pipes with wings with foundation improvement pillars in soil cement and spiral wings attached to the shaft intermittently. This composite pile has large vertical and horizontal bearing capacities and is a construction method of foundation piles with consideration of environments with little surplus soil, using steel pipes with small diameters. In this study, several full scale loading tests on steel pipe pile with wings installed in soil cement column are presented, and bearing capacity of the composite pile is studied. Especially, combination effect of soil cement column and steel pipe with wings on bearing capacity performance are discussed. Threedimensional elasto-plastic finite element analysis based on the results of loading tests to help understand this composite pile’s mechanical characteristics is also performed.
{"title":"Study on the in-situ pile loading test and bearing capacity characteristics of steel pipe piles with wings installed in soil cement column","authors":"T. Tamai, D. Itou, Eijirou Mizoguchi","doi":"10.3208/JGS.4.273","DOIUrl":"https://doi.org/10.3208/JGS.4.273","url":null,"abstract":"The steel pipe piles with wings installed in soil cement developed in Japan and Vietnam are composite foundation piles made of steel pipes with wings with foundation improvement pillars in soil cement and spiral wings attached to the shaft intermittently. This composite pile has large vertical and horizontal bearing capacities and is a construction method of foundation piles with consideration of environments with little surplus soil, using steel pipes with small diameters. In this study, several full scale loading tests on steel pipe pile with wings installed in soil cement column are presented, and bearing capacity of the composite pile is studied. Especially, combination effect of soil cement column and steel pipe with wings on bearing capacity performance are discussed. Threedimensional elasto-plastic finite element analysis based on the results of loading tests to help understand this composite pile’s mechanical characteristics is also performed.","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"2 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":"128571274","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":"Effect of curing periods on unconfined compressive characteristics of cement-stabilized soils utilizing bassanite – beneficial use of waste plasterboard –","authors":"T. Kamei, Y. Ogawa, Toshihide Shibi","doi":"10.3208/JGS.4.99","DOIUrl":"https://doi.org/10.3208/JGS.4.99","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"4 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":"129810328","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":"Optimal arrangement of sampling location for evaluating soil contamination under the informative condition","authors":"O. Bannai, Rumi Iwata, M. Yoneda, S. Morisawa","doi":"10.3208/JGS.2.113","DOIUrl":"https://doi.org/10.3208/JGS.2.113","url":null,"abstract":"土壌汚染概況調査を行う場合，対象領域について何らかの土壌汚染に関する情報が存在している場合が多い。本研究では条件付き確率分布を用いた土壌採取地点の評価関数を用い，事前情報を組み込んだ最適な地点配置を決定し，事前情報を利用する方法の有効性について検討した。あいまいな事前情報を組み込んだサンプリング地点配置を探索した結果，事前情報なしにより決定した地点配置よりも適した配置となることが明らかとなった。土壌汚染概況調査を行う場合に一度に全採取地点を決定するよりも多段階に分けて採取し前の段階の実測データを基にして次の段階の地点配置を決定する手法の有効性を明らかにした。","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"2 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":"130742771","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}
K. Tani, K. Matsushita, T. Hashimoto, Akira Yamamoto, Hidekatsu Takeuchi, T. Noda, H. Kiku, Jun Obayashi, T. Kiyota
{"title":"Mitigation of liquefaction-induced damage to residential houses by surface ground improvement and its cost evaluation","authors":"K. Tani, K. Matsushita, T. Hashimoto, Akira Yamamoto, Hidekatsu Takeuchi, T. Noda, H. Kiku, Jun Obayashi, T. Kiyota","doi":"10.3208/JGS.9.533","DOIUrl":"https://doi.org/10.3208/JGS.9.533","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"45 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":"130401797","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":"Investigation and future prediction on the infiltration of de-icing agent into groundwater based on advection-dispersion analysis","authors":"J. Hada, K. Sasaki, T. Moroizumi, M. Nishigaki","doi":"10.3208/JGS.11.269","DOIUrl":"https://doi.org/10.3208/JGS.11.269","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"8 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":"128769532","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":"Controlling factors and effect of geologic age and depositional environment on cyclic shear deformation characteristics of soils","authors":"K. Wakamatsu, N. Yoshida, T. Mikami","doi":"10.3208/JGS.5.463","DOIUrl":"https://doi.org/10.3208/JGS.5.463","url":null,"abstract":"地震被害想定調査等に用いられる地震応答解析の高精度化を目的として，関東地方の5都県の95地点，482試料の繰返し変形特性データを収集し，地質年代と堆積環境に基づき26に分類し，繰返し変形特性に与える支配要因について整理した。その結果，以下の結論を得た。対象とした試料全体を見ると，地質年代・堆積環境，塑性指数，拘束圧のいずれもが繰返し変形特性に影響を与える。また，埋土，沖積土，洪積土の順に塑性化しやすい。つぎに砂質土では，拘束圧の影響が一番大きい。粘性土では，地質年代・堆積環境の影響は砂質土より大きい，塑性指数が30未満では拘束圧の影響は大きいが30以上では拘束圧の影響は小さい，塑性指数が小さいほど非線形化が起こりやすいなどの傾向がある。最後に，地質年代・堆積環境の影響は小さいとしてこれを無視し，拘束圧および塑性指数により土の繰返し変形特性をまとめた。","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"17 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":"124603440","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":"A new method for strain measurement of rock with conductive rubber","authors":"T. Matsushita, M. Osada, T. Takemura","doi":"10.3208/JGS.3.287","DOIUrl":"https://doi.org/10.3208/JGS.3.287","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"34 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":"127459705","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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