Pub Date : 2006-11-30DOI: 10.11532/JOURNALTE2004.16.155
Tomohiro Inoue, Nao Fujii, M. Ohuch, M. Shimoma, T. Tamura
{"title":"Numerical Simulation of Ground Deformation due to Pneumatic Caisson Tunnel","authors":"Tomohiro Inoue, Nao Fujii, M. Ohuch, M. Shimoma, T. Tamura","doi":"10.11532/JOURNALTE2004.16.155","DOIUrl":"https://doi.org/10.11532/JOURNALTE2004.16.155","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130809903","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 : 2006-11-30DOI: 10.11532/JOURNALTE2004.16.69
T. Shiraishi, Kengo Iwasa, Takashi Ishii, Akira Saito
{"title":"Applicability of ethanol bentonite slurry as a grout in rock mass","authors":"T. Shiraishi, Kengo Iwasa, Takashi Ishii, Akira Saito","doi":"10.11532/JOURNALTE2004.16.69","DOIUrl":"https://doi.org/10.11532/JOURNALTE2004.16.69","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"46 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133526801","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":"REDUCTION EFFECT OF SHEET PILE WALLS ON GROUND VIBRATION AND ITS ANALYSIS OF VIBRATION AMPLITUDE PHENOMENON","authors":"K. Hayakawa, Fumito Hara, Nobumasa Ueno, T. Nishimura, M. Shoji","doi":"10.2208/JSCEJF.62.492","DOIUrl":"https://doi.org/10.2208/JSCEJF.62.492","url":null,"abstract":"本研究では，列車走行による地盤振動に関し，振動の伝播経路において有効的かつ経済的な防振対策法の開発を目的としている．すなわち，実際に鋼矢板による地中防振壁を施工し，その施工段階ごとに列車走行時の地盤振動を測定して，この防振対策工による振動遮断効果を確認した．しかしながら，防振壁背後では振動増幅現象が生じていた．この現象を解明するために，三次元解析モデルを用いた数値シミュレーション解析（強制加振解析）を行った．これらの検討より，鋼矢板が共振現象を起こし二次的振動源となっていることが判明された．そこで，このような防振対策工による振動低減効果をより高めるための対策法を検討した結果，(1)鋼矢板を支持層まで深く打設する対策法，および(2)鋼矢板の打設枚数（一枚打設から二枚打設にする）を増加する対策法が，有効な防振対策法になることを確認した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125570284","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":"COMPARISON TESTS OF CRACK CONTROL METHODS ON TUNNEL CONCRETE LINING MODEL","authors":"Koji Baba, Tetsuo Ito, N. Sano, H. Taniguchi, R. Sugiyama, K. Fukudome","doi":"10.2208/JSCEJF.62.285","DOIUrl":"https://doi.org/10.2208/JSCEJF.62.285","url":null,"abstract":"トンネル覆工コンクリートの耐久性向上を図る上で，ひび割れの発生を低減することが重要である．本研究では，覆工コンクリートの乾燥収縮に起因するひび割れの抑制手法を検討することを目的に，ひび割れ発生に影響を及ぼすと考えられる要因のうち，養生条件，使用材料および拘束条件を取り上げ，覆工コンクリートを模擬したモデル試験体を用いたひび割れ発生程度の比較試験による評価を行った．その結果，養生条件では，散水養生が，使用材料では，膨張材がひび割れ抑制に有効であること，また，防水シート敷設による拘束低減効果が大きいことも明らかとなった．さらに，覆工コンクリート背面および脚部の拘束条件の違いによる影響について，実トンネルを模擬した2次元FEMによる応力解析を行い検証した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123766489","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 STUDY ON BEHAVIOR OF VERTICAL PRE-REINFORCED BOLT BASES ON FIELD MEASUREMENT IN THE SHALLOW TUNNEL","authors":"H. Shiroma, Mitsuo Masuda, M. Shinji, Mikio Matsui, K. Nishimura","doi":"10.2208/JSCEJF.62.117","DOIUrl":"https://doi.org/10.2208/JSCEJF.62.117","url":null,"abstract":"垂直縫地ボルトの地山補強機構を解明するため，地表面傾斜がゆるく，土被りの小さいトンネル坑口部で施工された垂直縫地ボルトの計測結果を詳細に分析し考察した．その結果，緩傾斜で土被りの小さい地形条件下における垂直縫地ボルトは，主にボルト軸方向の引張りや圧縮ひずみに抵抗する補強材として機能し，トンネル掘削による応力再配分によって生じた荷重を，地山を破壊することなく切羽前方やトンネル側部に伝える．また，トンネル側部では，縫地ボルトの根入れ先端部付近で，地表面沈下量を増加させる鉛直方向の地中変位が発生していることから，縫地ボルトの根入れ深さについて注意が必要であることがわかった．本研究では，トンネル周辺地山の挙動計測結果から新しい地山補強モデルを提案する．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128620563","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}
Hiroyasu Ohtsu, N. Phienwej, N. Supawiwat, Kenji Takahashi, Hiroaki Izumi
{"title":"PREDITCTION OF LAND SUBSIDENCE CONSIDERING THE VARIATION OF GROUNDWATER EXTRACTION IN BANGKOK","authors":"Hiroyasu Ohtsu, N. Phienwej, N. Supawiwat, Kenji Takahashi, Hiroaki Izumi","doi":"10.2208/JSCEJF.62.25","DOIUrl":"https://doi.org/10.2208/JSCEJF.62.25","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126729936","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 : 2005-12-01DOI: 10.11532/JOURNALTE2004.15.107
Yoji Oku, Noriyuki Horichi, A. Koizumi, Shizuo Hiroka
{"title":"Analysis and measurements of the effect of shield advance in close proximity to and transverse to a tunnel based on fiber optic measurements","authors":"Yoji Oku, Noriyuki Horichi, A. Koizumi, Shizuo Hiroka","doi":"10.11532/JOURNALTE2004.15.107","DOIUrl":"https://doi.org/10.11532/JOURNALTE2004.15.107","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116044391","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 : 2004-11-25DOI: 10.11532/JOURNALTE2004.14.17
J. Hwang, Masaru Sato
{"title":"New Practical Rock Block Analysis for Observational Design and Construction Method in Large Tunnels","authors":"J. Hwang, Masaru Sato","doi":"10.11532/JOURNALTE2004.14.17","DOIUrl":"https://doi.org/10.11532/JOURNALTE2004.14.17","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116243995","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}
Cho Hyun Chan, Kunishima Masahiko, Yoshida Tsuneaki
Since late 1980s, the number of Build-Operate-Transfer (BOT) type infrastructure projects that have been executed in Asia counts approximately 150. To meet the Asia's huge demand in infrastructure development and management, the unique BOT method will be implemented increasingly in the upcoming 21st century. The aim of this paper is to investigate the basic structure and explore the characteristics of the risks involved in the BOT projects located in Asian developing countries. Risks are categorized into nine different groups.Appropriate solutions and methods to reduce and manage each risk are also discussed. Fiveactual power projects from Asian developing countries are selected for a comparative study. 【Keyword】: Build-Operate-Transfer (BOT), Asian developing countries, structure, risks, solutions
{"title":"Build Operate Transfer (BOT) Project Financing in Asian Developing Countries:Comparative Study on the Structure and Risks in BOT Power Projects","authors":"Cho Hyun Chan, Kunishima Masahiko, Yoshida Tsuneaki","doi":"10.2208/PROCM.5.93","DOIUrl":"https://doi.org/10.2208/PROCM.5.93","url":null,"abstract":"Since late 1980s, the number of Build-Operate-Transfer (BOT) type infrastructure projects that have been executed in Asia counts approximately 150. To meet the Asia's huge demand in infrastructure development and management, the unique BOT method will be implemented increasingly in the upcoming 21st century. The aim of this paper is to investigate the basic structure and explore the characteristics of the risks involved in the BOT projects located in Asian developing countries. Risks are categorized into nine different groups.Appropriate solutions and methods to reduce and manage each risk are also discussed. Fiveactual power projects from Asian developing countries are selected for a comparative study. 【Keyword】: Build-Operate-Transfer (BOT), Asian developing countries, structure, risks, solutions","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134021394","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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