{"title":"A Consideration on Regional Difference in Amount of Construction Investment in Japan through Consumption of Ready:Mixed Concrete in Each Prefecture","authors":"M. Ouchi","doi":"10.2208/procm.9.219","DOIUrl":"https://doi.org/10.2208/procm.9.219","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"79 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":"123274173","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":"PRACTICAL USE OF AUTO TRACKING TOTAL STATION IN HYBRID DRILLING GUIDANCE SYSTEM OF ROCK DRILL","authors":"Hirofumi Miyahara, T. Sakaguchi, Takashi Matsuike, Mitsumasa Ogasawara, Ko Kawano, K. Nakagawa","doi":"10.2208/JSCEJF.65.32","DOIUrl":"https://doi.org/10.2208/JSCEJF.65.32","url":null,"abstract":"発破工法のトンネル掘削における削孔精度の重要性は，過去の研究において明らかにされている．近年，削岩機に各種の削孔誘導装置を装備する事例が増加しているが，誘導装置の経年劣化という課題があった．筆者らはロボット工学の見地から，内界センサ方式が主流であった削孔誘導装置に，自動追尾トータルステーションを外界センサとして活用したハイブリッド方式を開発した．実機試験の結果，1200時間稼動後の削孔精度の標準偏差は，高さ方向で約17mm，横方向で約37mmであった．また平均余掘長は従来技術と比較して約44mmの低減が認められ，土木分野におけるロボット工学の応用例を示した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","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":"131029811","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}
S. Akutagawa, Yuki Arimura, E. Nakamori, S. Sakurai, S. Baba, S. Mori
Magnetic anisotropy sensor is used for nondestructive measurement of stresses of a nut which is part of the head part of a PS anchor usually used for stabilizing rock mass in large scale underground caverns. Since the stresses in the nut reflect the level of axial force in the anchor, the results of the stress measurement can be used indirectly to estimate the current axial forces of PS anchors. By knowing distribution or changes in PS anchor forces, one can establish a fundamental safety assessment routine for large-scale underground caverns.
{"title":"NEW EVALUATION METHOD OF PS-ANCHOR FORCE BY USING MAGNETIC SENSOR AND ITS APPLICATION IN A LARGE UNDERGROUND POWERHOUSE CAVERN","authors":"S. Akutagawa, Yuki Arimura, E. Nakamori, S. Sakurai, S. Baba, S. Mori","doi":"10.2208/JSCEJF.64.413","DOIUrl":"https://doi.org/10.2208/JSCEJF.64.413","url":null,"abstract":"Magnetic anisotropy sensor is used for nondestructive measurement of stresses of a nut which is part of the head part of a PS anchor usually used for stabilizing rock mass in large scale underground caverns. Since the stresses in the nut reflect the level of axial force in the anchor, the results of the stress measurement can be used indirectly to estimate the current axial forces of PS anchors. By knowing distribution or changes in PS anchor forces, one can establish a fundamental safety assessment routine for large-scale underground caverns.","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"1952 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":"128027693","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":"PRACTICAL APPLICATION OF COMPRESSION-TYPE STEEL DAMPING BRACES FOR RAILWAY VIADUCTS","authors":"N. Kita, Koji Yoshida, M. Okano, M. Seki","doi":"10.2208/jscejf.63.277","DOIUrl":"https://doi.org/10.2208/jscejf.63.277","url":null,"abstract":"鉄道RCラーメン高架橋柱のうち耐震補強を行うことが難しい高架下利用箇所などを対象に，鋼製ブレースを圧縮材として使用する新しい形式のダンパーブレース工法（圧縮型鋼製ダンパーブレース工法）を開発した．本論文では，圧縮型鋼製ダンパーブレース工法の概要と，実験結果に基づく設計方法および本工法の性能を発揮するための施工方法について述べ，最後に実高架橋への適用事例を2例紹介する．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"85 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":"123129197","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 PERFORMANCE OF EXPRESSWAYS BASED ON SEISMIC STABILITY EVALUATION OF EMBANKMENT","authors":"Y. Hata, K. Ichii, S. Kano, T. Tsuchida, Takashi Imamura","doi":"10.2208/JSCEJF.65.50","DOIUrl":"https://doi.org/10.2208/JSCEJF.65.50","url":null,"abstract":"近年発生した2004年新潟県中越地震では関越自動車道，2007年能登半島地震では能登有料道路においてそれぞれ斜面崩壊が発生し，高速道路が閉鎖され緊急対応や復旧の障害となった．つまり災害対策において高速道路盛土の耐震性を事前に把握し，対策を講じておくことは重要である．そこで本稿では，高速道路のインターチェンジ間における高速道路盛土の耐震性評価手法を提案し，国内に実在する高速道路に適用した事例を示す．本提案手法によれば，耐震性が相対的に低い箇所を合理的に抽出することが可能となる．また，インターチェンジ間における高速道路盛土の耐震性評価指標や耐震補強の優先順位に関する評価指標についても提案した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","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":"127051062","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":"METEOROLOGICAL INFLUENCE AND A CORRECTION METHOD FOR GPS DISPLACEMENT MEASUREMENTS","authors":"T. Masunari, N. Shimizu","doi":"10.2208/JSCEJF.63.437","DOIUrl":"https://doi.org/10.2208/JSCEJF.63.437","url":null,"abstract":"GPS（Global Positioning System）による変位計測の信頼性を向上させるためには，計測結果から真の変位と計測に混入する誤差との識別を行い，誤差を補正することが重要である．本研究では，GPS変位計測における誤差要因のうち，最も影響の大きいと考えられる気象条件による大気圏遅延について，その補正方法を検討し，気象補正が可能な基線解析プログラムを開発した．そして，実際の計測結果に適用しその妥当性を検証した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"51 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":"127149881","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 DEGRADATION MECHANISM OF CLAYEY ROADBEDS UNDER BALLASTLESS-TRACK AND ITS COUNTERMEASURES","authors":"K. Muramoto, E. Sekine","doi":"10.2208/JSCEJF.62.519","DOIUrl":"https://doi.org/10.2208/JSCEJF.62.519","url":null,"abstract":"","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"23 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":"127448202","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":"INFLUENCE ON SEGMENTS BY JACK THRUST OF SHIELD-DRIVEN TUNNELING","authors":"Tomoaki Takeuchi, Yoshihiro Emori, Yoshihiro Suda, A. Koizumi","doi":"10.2208/JSCEJF.66.599","DOIUrl":"https://doi.org/10.2208/JSCEJF.66.599","url":null,"abstract":"都市部の地下はすでにインフラ構造物が輻輳しており，これから構築されるシールドトンネルは大深度地下に計画されることが多くなる．大深度地下にシールドトンネルを施工する場合には，施工時荷重がセグメントに与える影響は大きく，とくに，ジャッキ推力に対するセグメントの設計は重要になる． 本論文は，大深度地下におけるシールドトンネルでのセグメント計測結果と施工を模擬した実験結果などから，ジャッキ推力によるセグメントへの影響を検討するとともに，三次元FEM解析を行い，設計因子のセグメントへの影響程度を分析して，ジャッキ推力に対するセグメントの設計と施工時の対策の方向性を示したものである．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"50 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":"114009500","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":"APPLICATION OF AN IMPROVED PARTICLE SWARM OPTIMIZATION TO THE CORROSION DEPTH PREDICTION IN CONCRETE SEWER PIPES","authors":"T. Matsukawa, A. Miyamoto, Hideaki Nakamura","doi":"10.2208/JSCEJF.66.112","DOIUrl":"https://doi.org/10.2208/JSCEJF.66.112","url":null,"abstract":"本研究では，メタ戦略の一つである従来型の粒子群最適化のアルゴリズムに対して，［1］解空間の効率的な絞り込みと，［2］粒子の移動速度に減速機能を設けるといったシンプルな改良を図ることで，これら2つの機能の相乗効果によって最適解の探索効率が向上した．また新たな試みとして，求解困難な問題と考えられていたコンクリート製下水管路の腐食劣化現象の将来予測に，この改良型粒子群最適化を適用して，腐食深度予測式を新たに構築したことを特徴とする．その際，［1］硫化水素ガスの発生量，［2］下水管内の気温の1年分の計測データ，［3］下水管路の供用年数，［4］管壁材料の種類の情報を説明変数として採用した．本論文では，この改良型粒子群最適化の有用性と，腐食深度予測手法および予測式の有効性を検証した．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","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":"127568828","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 PROBABILISTIC EVALUATION OF CRITICAL LINE OF SEDIMENTRELATED DISASTER OCCURRENCE BY A LOGISTIC REGRESSION MODEL","authors":"Tsuguhiro Shinozaki, K. Fukuda, Hiroyuki Ohishi, Shigemitsu Sugihara, K. Furukawa","doi":"10.2208/JSCEJF.66.122","DOIUrl":"https://doi.org/10.2208/JSCEJF.66.122","url":null,"abstract":"平成17年度より土砂災害警戒情報の運用が始まっているが，土砂災害の発生危険基準線を構成するRBFN値の理解や周知が不十分であることや，避難勧告等の発令において予測雨量の精度の問題からタイミングよく住民へ避難を促すことができていない事例が見られる．そこで，本研究ではロジスティック回帰モデルを用いて，土砂災害警戒情報の発表や避難勧告等に用いられている指標を，より切迫性を実感しやすい確率値という形で表現することにより，災害発生の危険性や，予測雨量に頼らない 1時間先の超過予測の設定を試みた．また，発生確率の適用性を検証するため，他地域においてモデルの検証を行い，その有効性を確認した．さらに，10分間雨量データを用いて急激な降雨変動に対して，どの程度の予測の向上が可能であるかの検討を行った．","PeriodicalId":245964,"journal":{"name":"Doboku Gakkai Ronbunshuu F","volume":"5 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":"121325360","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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