M. Yamada, Y. Ito, M. Morita, K. Takezawa, Michio Motegi, K. Matsubara
{"title":"Proposal for management of investigation boring work using microtremor data: - From prediction of drilling depth to adequacy evaluation for engineering bedrocks -@@@－ボーリング深度の事前予測から工学的基盤の妥当性評価まで－","authors":"M. Yamada, Y. Ito, M. Morita, K. Takezawa, Michio Motegi, K. Matsubara","doi":"10.3208/JGS.9.739","DOIUrl":"https://doi.org/10.3208/JGS.9.739","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"134 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":"122903509","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":"Experimental investigation on the surface temperature distribution characteristics of asphalt concretes having detached layers","authors":"K. Hayano, J. Mizukami, Tetsuo Suzuki","doi":"10.3208/JGS.2.1","DOIUrl":"https://doi.org/10.3208/JGS.2.1","url":null,"abstract":"空港アスファルト舗装の層間剥離の探査手法として，夜間の限られた時間で広い面積が調査できる必要があることから，赤外線カメラを用いた非破壊試験に注目した。本研究では空港アスファルト舗装の層間剥離を模擬したアスファルト混合物層の実物大供試体を作製し，環境室内にセットして昼夜の変化を再現して，赤外線カメラで夜間帯の供試体表面温度分布を測定した。得られた表面温度および内部温度の分布特性から，赤外線カメラで探査しやすい層間剥離の形態や調査に望ましい舗装環境について考察を行った。","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"129 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":"125223688","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}
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":"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}
T. Matsuo, K. Mori, N. Hiraoka, Mengxian Sun, R. Fukagawa
{"title":"A basic study of applicability for the SPH simulation on tunnel face collapse behavior around tunnel portal zone","authors":"T. Matsuo, K. Mori, N. Hiraoka, Mengxian Sun, R. Fukagawa","doi":"10.3208/JGS.10.569","DOIUrl":"https://doi.org/10.3208/JGS.10.569","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"30 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":"125037907","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 new direct shear apparatus and discussion on its effectiveness","authors":"Hiroki Ishikawa, Yujian Liu, Akitoshi Mochizuki, Syouji Okada, S. Sreng","doi":"10.3208/JGS.4.11","DOIUrl":"https://doi.org/10.3208/JGS.4.11","url":null,"abstract":"一面せん断定圧試験（CD試験）で生じる「供試体とせん断箱の側面摩擦問題」を避けるため，従来型試験機（以下では三笠型試験機と呼ぶ）の上部反力板上に2個の独立した空圧式ジャッキと荷重計を取り付けて，上部せん断箱にモーメントを加えるとともに，せん断箱を上，下に制御して，試験上必要な，水平および定圧条件を満足する方法を開発した。この装置を用いて密度を変えた豊浦砂の一連のCD試験を行い，従来型試験機によるCD試験，定体積試験（CU試験）結果と比較した。その結果，本研究で開発した「せん断中に上部せん断箱を上下させる装置」が一面せん断試験機の側面摩擦の解消に有効な方法であること，また定体積試験によるφ' 強度がφCD強度とほぼ一致すること，また三軸CD試験強度と比較して大差が無いこと等の結果が得られた。","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"83 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":"131235417","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}
T. Shinjo, L. Ren, Y. Komiya, M. Ueno, Y. Kawamitsu
{"title":"Mechanical properties of charcoal from sewage sludge as geo-material","authors":"T. Shinjo, L. Ren, Y. Komiya, M. Ueno, Y. Kawamitsu","doi":"10.3208/JGS.8.379","DOIUrl":"https://doi.org/10.3208/JGS.8.379","url":null,"abstract":"","PeriodicalId":246019,"journal":{"name":"Jiban Kogaku Janaru (japanese Geotechnical Journal)","volume":"107 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":"122009737","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":"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}
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