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QUANTITATIVE DETERMINATION OF LOOSENING ZONE IN ROCK TUNNELING 岩石掘进松动带的定量测定
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.62.440
C. Tanimoto, K. Tsusaka, Y. Mitarashi
{"title":"QUANTITATIVE DETERMINATION OF LOOSENING ZONE IN ROCK TUNNELING","authors":"C. Tanimoto, K. Tsusaka, Y. Mitarashi","doi":"10.2208/JSCEJC.62.440","DOIUrl":"https://doi.org/10.2208/JSCEJC.62.440","url":null,"abstract":"トンネル施工の大原則は，掘削に伴うゆるみを極力抑え，地山のアーチ作用を積極的に利用することである．本論文では，この「地山のアーチ作用」は地山の非弾性挙動に起因するものと考え，トンネル掘削に伴うゆるみ域の発達を定量的に評価した．第三紀の頁岩・砂岩地山に施工されたトンネルを対象とし，70例ほどの変位計測結果に基づいて初期変形速度と断面変形率の関係および発達する非弾性域を算出した．そして，その結果と理論解析を用いて，切羽の進行やインバートの断面閉合によるゆるみ域の発達の違いを考察した．その結果，大きな初期挙動の地山では掘削直後においてゆるみ域が過度に発達し，最終的に大きな変形が生じてしまったと考えられた．また，掘削直後のインバートによる断面の閉合がゆるみの発達を大きく抑制するという結論を得た．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"16 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":"122018445","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
REAL TIME RISK EVALUATION FOR A SLOPE BEHIND AN IMPORTANT CULTURAL ASSET DUE TO RAINFALL USING PRINCIPAL COMPONENT ANALYSIS 利用主成分分析法对重要文化遗产背后的斜坡进行降雨的实时风险评估
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.65.564
T. Satomi, K. Sako, Ikuo Yasukawa, R. Fukagawa
{"title":"REAL TIME RISK EVALUATION FOR A SLOPE BEHIND AN IMPORTANT CULTURAL ASSET DUE TO RAINFALL USING PRINCIPAL COMPONENT ANALYSIS","authors":"T. Satomi, K. Sako, Ikuo Yasukawa, R. Fukagawa","doi":"10.2208/JSCEJC.65.564","DOIUrl":"https://doi.org/10.2208/JSCEJC.65.564","url":null,"abstract":"わが国では,梅雨期や台風襲来期の大雨による斜面災 害が多発し,多くの生命や財産が失われている.京都市 内の山麓周辺には代替性のない重要文化財が数多く存在 し,観光客は強雨時でも拝観することがあるため,強雨 時の進入禁止に対する基準を設定することが必要である. さらに,観光客の安全に関わって周辺住民にも避難勧告 の発令や解除等の基準を明確にすることが望まれる.降 雨に対する斜面災害への防災対策として,従来,降雨量 に基づいて斜面の危険度を評価することに重点が置かれ てきた.この方法は,広域の斜面を評価対象とする場合 は有効であるものの,斜面ごとの地形や地質を考慮しき れていない.つまり,従来の方法では一般的な危険度 判断にとどまり,特定斜面(例えば,重要な文化財の後 背斜面)に対する斜面崩壊の危険性を直接評価していな いため,崩壊の危険度判断に空振りが生じる可能性があ り,解除の発令にも時間を要することになる.降雨時の 表層すべり型崩壊は,(1) 雨水の浸透による土塊自重の 増加,(2) 地盤内の飽和度の増加によるせん断強度の低 下,(3) 地下水位の上昇による浮力や浸透力の増加によ り発生するといわれている.つまり,地盤内の水分変動 (間隙水圧や体積含水率など)を現地モニタリングから 直接把握することで,地形や地質の影響を考慮できるも のと考えられ,避難勧告の発令や解除等のタイミングを より具体的に設定できる可能性がある.そこで,筆者ら は現地モニタリング結果を使って統計的評価手法(デー タ分析)や数値力学的評価手法(数値シミュレーショ ン)を有機的に結びつけた降雨時の表層すべり型崩壊に 対する防災システムの確立を目指しており,2004年7月 から京都市の重要文化財後背斜面(以下,対象斜面)に テンシオメータと転倒ます型雨量計を設置し,間隙水圧 と10分間雨量を計測している.さらに2006年5月からは, 広範囲の詳細な斜面状況を把握するために計測地点の多 点化を実施し,一部の測線では光ファイバセンサ(BOTDR方式)を設置し地表面変位も計測している. 本論文では,現地計測結果(10分間雨量, 間隙水圧, 地 表面変位)に基づき統計的評価手法を採用して降雨時の 土木学会論文集C Vol.65 No.2, 564-578, 2009. 6","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"21 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":"122114553","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: 2
RESEARCH OF SHEAR STRESS GENERATION IN DISC PARTICLE SHEAR FLOW BY TWO-DIMENSIONAL RAPID FLOW APPARATUS 用二维快流仪研究圆盘颗粒剪切流中剪切应力的产生
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.763
K. Ichiba, K. Iwashita, M. Oda
{"title":"RESEARCH OF SHEAR STRESS GENERATION IN DISC PARTICLE SHEAR FLOW BY TWO-DIMENSIONAL RAPID FLOW APPARATUS","authors":"K. Ichiba, K. Iwashita, M. Oda","doi":"10.2208/JSCEJC.63.763","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.763","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"167 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":"122197404","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
GEOTECHNICAL INVESTIGATION AT THE PLANNING SITE OF THE D-RUNWAY OF THE TOKYO INTERNATIONAL AIRPORT 东京国际机场d型跑道规划场地岩土工程勘察
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.64.585
Y. Watabe, Masanori Tanaka, T. Noguchi, M. Miyata
{"title":"GEOTECHNICAL INVESTIGATION AT THE PLANNING SITE OF THE D-RUNWAY OF THE TOKYO INTERNATIONAL AIRPORT","authors":"Y. Watabe, Masanori Tanaka, T. Noguchi, M. Miyata","doi":"10.2208/JSCEJC.64.585","DOIUrl":"https://doi.org/10.2208/JSCEJC.64.585","url":null,"abstract":"東京国際空港では，逼迫する航空需要に応えるため，沖合に4本目の滑走路（D滑走路）を建設する再拡張事業が進められている．建設予定地において，粘土層については乱さない試料を採取して各種室内試験により地盤定数を評価した．また，砂地盤については標準貫入試験によるN値で地盤の状態を評価した．一連の試験結果を基に，地質学的な知見も踏まえて当該地区の地層構成を明らかにした．粘土地盤の各種地盤定数については，建設予定海域で得られた全試験結果を深度方向にプロットし，工学的な判断を加味した代表的な深度分布を設定した．設定した深度分布の平均値からのばらつきに関する統計的表現により，設定した深度分布が試験結果のばらつきの中でどのように位置づけられるかについても検討した．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"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":"128577816","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: 2
DEVELOPMENT OF CEMENT TREATED CLAY MIXED WITH SCRAP TIRE CHIPS AS NOVEL GEOMATERIAL AND STUDY OF ITS MECHANICAL PROPERTIES 新型土工材料水泥处理粘土的研制及其力学性能研究
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.881
Y. Mitarai, K. Yasuhara, Y. Kikuchi, A. Karmokar
{"title":"DEVELOPMENT OF CEMENT TREATED CLAY MIXED WITH SCRAP TIRE CHIPS AS NOVEL GEOMATERIAL AND STUDY OF ITS MECHANICAL PROPERTIES","authors":"Y. Mitarai, K. Yasuhara, Y. Kikuchi, A. Karmokar","doi":"10.2208/JSCEJC.63.881","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.881","url":null,"abstract":"This study is about the recycling technology of soft clay and scrape tire as geomaterial. And, the purpose of this paper is describing the advantageous mechanical properties of cement treated clay mixed with tire chips. Generally, cement treated clay shows the brittle deformation property, but it is found that it is able to improve its toughness by adding tire chips at 10 to 20% volume. In this paper, it is shown the results of some laboratory tests, unconfined compression test and triaxial compression tests about this composite material, in order to explain the effect of improvement in its deformation property by mixing tire chips, quantitively. And it is tried to show the consideration of its mechanism.","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"123 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":"124599900","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: 2
EFFECT OF UPPER SURFACE COVERING OVER RAILWAY EMBANKMENT SLOPES ON RAIN-INDUCED SLOPE FAILURE 铁路路堤边坡上地表覆盖对雨致边坡破坏的影响
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.441
K. Okada, T. Sugiyama, O. Nunokawa, N. Ota, H. Tuchiya, S. Iwasaki
{"title":"EFFECT OF UPPER SURFACE COVERING OVER RAILWAY EMBANKMENT SLOPES ON RAIN-INDUCED SLOPE FAILURE","authors":"K. Okada, T. Sugiyama, O. Nunokawa, N. Ota, H. Tuchiya, S. Iwasaki","doi":"10.2208/JSCEJC.63.441","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.441","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","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":"124003852","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
NUMERICAL ANALYSIS FOR SEISMIC EVALUATION OF RETAINING WALLS CONSISTING OF CONCRETE PANELS AND BACKFILL REINFORCED WITH GEOGRIDS 土工格栅加筋混凝土板-回填挡土墙抗震性能数值分析
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.62.45
A. Wakai, Masamichi Amano, Y. Iizuka, K. Ugai
{"title":"NUMERICAL ANALYSIS FOR SEISMIC EVALUATION OF RETAINING WALLS CONSISTING OF CONCRETE PANELS AND BACKFILL REINFORCED WITH GEOGRIDS","authors":"A. Wakai, Masamichi Amano, Y. Iizuka, K. Ugai","doi":"10.2208/JSCEJC.62.45","DOIUrl":"https://doi.org/10.2208/JSCEJC.62.45","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"41 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":"123341839","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
AN INVERSE PROBLEM STUDY OF GEOENVIRONMENTAL PARAMETERS BASED ON THE RESULTS OF COLUMN TESTS 基于柱试验结果的地质环境参数反问题研究
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.63.34
Kazuaki Hioki, K. Aoki
{"title":"AN INVERSE PROBLEM STUDY OF GEOENVIRONMENTAL PARAMETERS BASED ON THE RESULTS OF COLUMN TESTS","authors":"Kazuaki Hioki, K. Aoki","doi":"10.2208/JSCEJC.63.34","DOIUrl":"https://doi.org/10.2208/JSCEJC.63.34","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"7 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":"123369052","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
COMPATIBILITY OF PROBABILITY DISTRIBUTION MODELS FOR ESTIMATION OF FREEZING INDEX 冻结指数估计的概率分布模型的相容性
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.65.716
S. Kawabata, S. Kameyama, M. Takami, M. Kamiya
{"title":"COMPATIBILITY OF PROBABILITY DISTRIBUTION MODELS FOR ESTIMATION OF FREEZING INDEX","authors":"S. Kawabata, S. Kameyama, M. Takami, M. Kamiya","doi":"10.2208/JSCEJC.65.716","DOIUrl":"https://doi.org/10.2208/JSCEJC.65.716","url":null,"abstract":"","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"47 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":"123497689","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
APPLICABILITY ASSESSMENT OF SEISMIC COUNTERMEASURES FOR NEWLY CONSTRUCTED MOUNTAIN TUNNELS IN POOR GEOLOGICAL CONDITIONS 地质条件较差的新建山地隧道抗震对策适用性评价
Doboku Gakkai Ronbunshuu C Pub Date : 1900-01-01 DOI: 10.2208/JSCEJC.65.1062
K. Yashiro, Y. Kojima, H. Miyabayashi, Jun Saito, T. Asakura, J. Takemura
{"title":"APPLICABILITY ASSESSMENT OF SEISMIC COUNTERMEASURES FOR NEWLY CONSTRUCTED MOUNTAIN TUNNELS IN POOR GEOLOGICAL CONDITIONS","authors":"K. Yashiro, Y. Kojima, H. Miyabayashi, Jun Saito, T. Asakura, J. Takemura","doi":"10.2208/JSCEJC.65.1062","DOIUrl":"https://doi.org/10.2208/JSCEJC.65.1062","url":null,"abstract":"山岳トンネルは一般に地震に強い構造物といわれているが，地震の規模や震源からの距離によってはひび割れや圧ざなどの被害を生じることがある．筆者らは，山岳トンネルの地震被害を軽減することを目的とし，山岳トンネルの地質不良区間での地震被害に着目し，地震被害の低減に効果があるとされるインバート，繊維補強コンクリートの他に，発泡スチロール（EPS）を用いた緩衝材による対策工を提案し，これらの適用性について，模型実験や数値解析により研究を行った．その結果，インバートにより変形や盤膨れを抑制できること，繊維補強コンクリートによりじん性が向上しひび割れが分散することにより剥落を防止できること，緩衝材により変形を低減しひび割れを抑制できることがわかった．","PeriodicalId":131805,"journal":{"name":"Doboku Gakkai Ronbunshuu C","volume":"40 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":"121710832","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
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