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CHANGE IN VOID STRUCTURE DUE TO PARTICLE BREAKAGE OF VOLCANIC COARSE-GRAINED SOIL AND ITS EVALUATION 火山粗粒土颗粒破碎引起的孔隙结构变化及其评价
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.224
T. Nakata, S. Miura
{"title":"CHANGE IN VOID STRUCTURE DUE TO PARTICLE BREAKAGE OF VOLCANIC COARSE-GRAINED SOIL AND ITS EVALUATION","authors":"T. Nakata, S. Miura","doi":"10.2208/JSCEJC.63.224","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.224","url":null,"abstract":"本研究では，圧密・せん断による火山灰質粗粒土の粒子破砕の要因を検討するために，構成粒子内の間隙を定量的に評価し，粒子破砕による間隙構造の変化を調べている．ここでは特に，火山灰質粗粒土の間隙比の定量化のために間隙比測定試験を実施するとともに，破砕性の異なる2種類の火山灰質粗粒土に対して行った一連の三軸試験から，クリープ挙動と粒子破砕のかかわりを解明することをめざした．その結果，火山灰土の構成粒子内には開口した内間隙(開口内間隙)と閉塞した内間隙(閉塞内間隙)が存在し，このような粒子内の間隙比の大小がクリープ特性に密接な関係があることを示した．なお粒子破砕特性は，主にクリープ開始時の開口内間隙比に支配されるものの，クリープ載荷中では閉塞内間隙比の確実な減少が認められた．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","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":"134541009","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: 10
FEATURES AND CAUSES OF DAMAGE TO THE SHIN-YAMAMOTO RESERVOIR DAM BY THE 2004 NIIGATAKEN-CHUETSU EARTHQUAKE 2004年新竹中越地震对新山本水库大坝的破坏特征及原因
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.64.532
Satoshi Takisawa, T. Shimamine, Shin-ichiro Nozawa, T. Ohmachi
{"title":"FEATURES AND CAUSES OF DAMAGE TO THE SHIN-YAMAMOTO RESERVOIR DAM BY THE 2004 NIIGATAKEN-CHUETSU EARTHQUAKE","authors":"Satoshi Takisawa, T. Shimamine, Shin-ichiro Nozawa, T. Ohmachi","doi":"10.2208/JSCEJC.64.532","DOIUrl":"https://doi.org/10.2208/JSCEJC.64.532","url":null,"abstract":"新潟県中越地震によってJR東日本が所有する信濃川発電所のフィルダム形式の三つの調整池にも被害が生じた．三つの調整池のうち，新山本調整池は，堤体の沈下，のり面の亀裂，噴砂等の被害が生じたが，調査の結果，コアには損傷が認められず，貯水機能を失うような深刻な被害は免れ，補修可能な表層のみの損傷であった．ただし，沈下に関しては，最大で堤体高さの2％もの沈下を記録し，堤体高さの60％付近の沈下が大きかったことが分かった．この沈下は，各種調査から，特定のすべりによる沈下ではなく，堤体全体が沈下したものと判断される．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"64 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":"130374343","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
DEFORMATION BEHAVIOR AND COUNTER MEASURES OF EXPRESSWAY EMBANKMENT ON SUPER-SOFT GROUND 高速公路超软土地基路堤变形特性及防治
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.66.356
Masafumi Hirata, M. Kitoh, Kouichi Yamada, A. Iizuka, K. Arai
{"title":"DEFORMATION BEHAVIOR AND COUNTER MEASURES OF EXPRESSWAY EMBANKMENT ON SUPER-SOFT GROUND","authors":"Masafumi Hirata, M. Kitoh, Kouichi Yamada, A. Iizuka, K. Arai","doi":"10.2208/JSCEJC.66.356","DOIUrl":"https://doi.org/10.2208/JSCEJC.66.356","url":null,"abstract":"現在，舞鶴若狭自動車道の築造が行われている福井県若狭地区は，粘性土と腐植土から構成される地層が厚く堆積する超軟弱地盤帯である．本施工に先立ち実施した試験盛土では，大規模な沈下が発生すると同時に，周辺地盤に広範囲にわたって多大な影響を及ぼした．さらに，周辺地盤の変形が盛土断面片側にのみ集中する特殊な傾向も見られた．本論文では，このような試験盛土の変形挙動要因を検討するため，事後ボーリング調査および二次元の土-水連成FEM解析を実施した．この結果，押え盛土下の粘性土層が大変形を引き起こすと同時に，地盤深部の腐植土層が側方流動を起こしていることが推測された．また，この粘性土層および腐植土層の圧密を促進させることで，周辺地盤の変形を抑制する効果が期待できることがわかった．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"442 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":"116587079","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: 4
ESTIMATING GEOLOGICAL STRUCTURES USING SEISMIC REFLECTION PROFILING FROM SHIELD TUNNEL 盾构隧道地震反射剖面估算地质构造
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.64.90
A. Takahashi, Tomoaki Takeuchi, Yoshitaka Niinomi, Matsubara Yoshikazu, Masato Yamamoto, Toshifumi Matsuoka
{"title":"ESTIMATING GEOLOGICAL STRUCTURES USING SEISMIC REFLECTION PROFILING FROM SHIELD TUNNEL","authors":"A. Takahashi, Tomoaki Takeuchi, Yoshitaka Niinomi, Matsubara Yoshikazu, Masato Yamamoto, Toshifumi Matsuoka","doi":"10.2208/JSCEJC.64.90","DOIUrl":"https://doi.org/10.2208/JSCEJC.64.90","url":null,"abstract":"本論文では，既設シールドトンネル坑内で弾性波を発震し，セグメントを透過した弾性波の地層境界からの反射波を同じトンネル坑内で受振することで，トンネル周辺の地層構成を推定する手法について提案する．すなわち，地中の任意の場所に掘削されたトンネル坑内の任意の一点で発震された弾性波（S波）は，コンクリート製のセグメントを透過してトンネル周辺全体の地盤に伝播する．そして，トンネル上下の地層境界から到来する反射波をトンネル坑内で受振し，反射波の到来方向を分離することで，地層構成を推定することが可能となる．本探査法を既設のトンネル坑内で実施したところ，ボールリング調査により作成した地層構成と整合性のある結果が得られた．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"53 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":"116971503","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
BASIC EXPERIMENTAL RESEARCH ON OIL CONTAMINATION OF SUBSURFACE MATERIAL 地下物质油污染的基础实验研究
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.249
M. Nishigaki, Yuichi Kanno
{"title":"BASIC EXPERIMENTAL RESEARCH ON OIL CONTAMINATION OF SUBSURFACE MATERIAL","authors":"M. Nishigaki, Yuichi Kanno","doi":"10.2208/JSCEJC.63.249","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.249","url":null,"abstract":"本研究は土壌・地下水汚染の中で現在問題となっている油汚染の定量的な取り扱いについて論述する．すなわち，水，空気，油の三相流体の多孔質内の流動を支配する浸透特性を室内試験によってどのように求めるかを検討した．試験法としては，γ線による瞬時水分計測法と比較的簡単なGreen-Amptモデル試験法とを比較して，Green-Amptの簡単な試験法の適用性について吟味した．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"22 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":"117087455","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
COMPRESSION AND UNDRAINED SHEAR CHARACTERISTICS OF SAND-FINES MIXTURES WITH VARIOUS PLASTICITY 不同塑性砂粉混合物的压缩和不排水剪切特性
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.1142
Y. Konishi, M. Hyodo, Shusaku Ito
{"title":"COMPRESSION AND UNDRAINED SHEAR CHARACTERISTICS OF SAND-FINES MIXTURES WITH VARIOUS PLASTICITY","authors":"Y. Konishi, M. Hyodo, Shusaku Ito","doi":"10.2208/JSCEJC.63.1142","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.1142","url":null,"abstract":"塑性の異なる3種の細粒土と1種の珪砂を種々の割合で混合することで，種々の塑性と細粒分含有率からなる混合土を作製した．このような混合土に対して，一連の定ひずみ速度圧密試験及び非排水三軸圧縮試験を行った．その結果，圧密及びせん断特性において，混合土には砂骨格を主体とする挙動から細粒土主体の挙動に移行するまでの領域が存在し，その境界となる細粒分含有率Fc及び粘土分含有率Pcは，それぞれFc=30% 及びPc=15% 付近であることが分かった．また，細粒分含有率Fc=30% 程度以下においては，シルトと砂が骨格構造を形成するという考えのもと，砂 · シルト骨格間隙比の概念を用いてせん断強度に及ぼす影響要因について検討した．その結果，細粒土の種類によらず砂 · シルト骨格間隙比とせん断強度は良い相関性を示すことが明らかとなった．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"151 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":"115426366","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: 9
PULLOUT CHARACTERISTICS OF DIAMETER-EXPANDED ANCHOR IN SAND 扩径锚杆在砂土中的拉拔特性
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.66.845
Toshikazu Sawamatsu, H. Kohashi, Y. Udagawa, Satoshi Kobayashi, Taketo Hayashi, K. Okazaki
{"title":"PULLOUT CHARACTERISTICS OF DIAMETER-EXPANDED ANCHOR IN SAND","authors":"Toshikazu Sawamatsu, H. Kohashi, Y. Udagawa, Satoshi Kobayashi, Taketo Hayashi, K. Okazaki","doi":"10.2208/JSCEJC.66.845","DOIUrl":"https://doi.org/10.2208/JSCEJC.66.845","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"75 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":"123213576","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
STUDY ON THE DEFORMATION CHARACTERISTIC OF MASONRY WALLS DURING EARTHQUAKE WITH FULL-SIZED MODEL 用全尺寸模型研究地震作用下砌体墙体的变形特性
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.66.43
Hiroyuki Yamamoto, T. Nishigata, S. Yao, K. Nishida, Hiroyoshi Kasa
{"title":"STUDY ON THE DEFORMATION CHARACTERISTIC OF MASONRY WALLS DURING EARTHQUAKE WITH FULL-SIZED MODEL","authors":"Hiroyuki Yamamoto, T. Nishigata, S. Yao, K. Nishida, Hiroyoshi Kasa","doi":"10.2208/JSCEJC.66.43","DOIUrl":"https://doi.org/10.2208/JSCEJC.66.43","url":null,"abstract":"城郭石垣の動的状態での安定性を力学的に評価することを目的に，実物大の石垣の大型振動台実験をした．石垣は，“打込みはぎ”による反りを有する形状とし，背面は栗石と土で充填した．実験方法は，入力波形を3Hzの正弦波，入力方向を水平一方向とし，加速度振幅を段階的に増加させ，各材料（石材，栗石，背面地山）の応答状態を計測した．その結果，688gal付近を境界に，石垣の変形が“転倒モード”から“孕み出しモード”へ移行し，各材料の応答加速度や各材料間の位相差に変化があることが捉えられた．また，このような石垣の変形過程は，栗石の沈下等による背面土圧の増加や岩盤の内部摩擦角に相当する石材間の摩擦角の低下に伴い発生することが明らかになった．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"11 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":"124818864","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: 5
STRENGTH PROPERTIES OF COAL FLY ASH PREPARED BY SLURRY METHOD AND EVALUATION OF OPTIMUM MIXING WATER RATIO 浆法制备粉煤灰的强度特性及最佳掺水比评价
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.65.663
D. Suetsugu, Y. Miyata
{"title":"STRENGTH PROPERTIES OF COAL FLY ASH PREPARED BY SLURRY METHOD AND EVALUATION OF OPTIMUM MIXING WATER RATIO","authors":"D. Suetsugu, Y. Miyata","doi":"10.2208/JSCEJC.65.663","DOIUrl":"https://doi.org/10.2208/JSCEJC.65.663","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","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":"123027276","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
INVESTIGATION INTO THE PERFORMANCE OF A DEVELOPED EARTH-PRESSURE SENSOR 一种新型地压力传感器的性能研究
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.64.696
H. Miyashita, M. Nakamura, Xi Cao
{"title":"INVESTIGATION INTO THE PERFORMANCE OF A DEVELOPED EARTH-PRESSURE SENSOR","authors":"H. Miyashita, M. Nakamura, Xi Cao","doi":"10.2208/JSCEJC.64.696","DOIUrl":"https://doi.org/10.2208/JSCEJC.64.696","url":null,"abstract":"粒状体的性質が卓越する土の土圧計測は，流体圧の計測と異なり十分な信頼性を有しているとは言い難い．設置された土圧計で，被測定物である土に応力集中が生じる．この影響を少なくするには，剛性が土と同等な土圧計を使用することが有効である．これを実現するために，合成ゴムと金属板との積層材を起歪部に用いた新しいタイプの低剛性土圧計を開発した．土圧計側面に作用する側圧の影響を補償する目的で開発した三軸可変空気圧検定法で較正方法を確立して，砂圧検定を実施した．その結果，低剛性土圧計の出力誤差やヒステリシス特性について，従来のダイヤフラム型土圧計やピストン型土圧計の誤差論にはない新たな特性を確認することができ，最適な土圧計を設計・製作する上で有効な知見を得た．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"55 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":"123279782","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: 3
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