Search Results 1-14 of 14

  • The effectiveness of automated angle control system to reduce the overbreak for excavation by blasting

    FUKUDA Tsuyoshi , ARAI Takumi , TAKASHINO Ryota , OTSUBO Hiroyuki , KAKIMI Kousuke , OKUBO Masahiro , YAMAGUCHI Yohei , OKAWA Ryo , YAMABE Keita

    … Comprehensive collection and utilization of information were carried out and with target to eliminate the over reliance of experience worker in mountain tunneling, "Auto-mated Angle Control System" technology was developed to reduce the overbreak of tunnel during excavation. …

    International Journal of the JSRM 15(1), 21-23, 2019

    J-STAGE 

  • NEW TUNNEL PROFILE MEASURING SYSTEM WITH A PROMPT 3D SCANNER AND UNDERBREAK GUIDANCE APPLICATION  [in Japanese]

    犬塚 隆明 , 岩野 圭太 , 清水 清一郎 , 手塚 康成

    岩盤力学に関するシンポジウム講演論文集 Proceedings of the Symposium on Rock Mechanics 45, 37-42, 2018-01-15

  • Non-open Construction for a Structure Crossing underneath a Railway by Cutting JES Method  [in Japanese]

    KUWABARA Kiyoshi , ARIMITSU Takeshi , TAKAHASHI Yasuhiro , NAKAI Hiroshi

    … The development discussed in this paper is aimed at performing excavation without overbreak. …

    地盤工学会誌 = / the Japanese Geotechnical Society 60(8), 10-13, 2012-08-01

    NDL Digital Collections  References (4)

  • PRACTICAL USE OF AUTO TRACKING TOTAL STATION IN HYBRID DRILLING GUIDANCE SYSTEM OF ROCK DRILL  [in Japanese]

    MIYAHARA Hirofumi , SAKAGUCHI Takeshi , MATSUIKE Takashi , OGASAWARA Mitsumasa , KAWANO Ko , NAKAGAWA Koji

    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 …

    Doboku Gakkai Ronbunshuu F 65(1), 32-37, 2009

    J-STAGE 

  • MODELING EXPERIMENT ON SURFACE SETTLEMENT FOR OVERBREAK EXCAVATION BY PIPE ROOF AUXILIARY METHOD  [in Japanese]

    KISHIDA Kiyoshi , RYU Minbon , CUI Ying , KIMURA Makoto

    パイプルーフ工法で鋼管を掘削挿入する際,鋼管表面の摩擦抵抗と継手部の摩擦抵抗を抑制するための拡大ビットとフリクションカッターによる余掘り掘削が行われる.結果として,鋼管周辺に余掘りによる空洞が生じ,土被りの小さい個所では地表面沈下を誘発する恐れがある.そこで本研究では,余掘り掘削による地表面沈下特性を明確にし,その余掘り掘削による地表面沈下対策を目的として,余掘り掘削を模擬した模型実験装置を開発し …

    Doboku Gakkai Ronbunshuu C 65(3), 609-616, 2009

    J-STAGE 

  • A study on smooth blasting technique using detonating cords

    SUMIYA Fumihiko , KATO Yukio

    Science and technology of energetic materials 68(6), 167-171, 2007-12-31

    References (12)

  • Influence that overbreak on the settlement of ground by shield driving for constructing Rinkai-Ohimachi station

    Matsumoto Shin , Takahashi Koichi , Okochi Yasuhiko , Komanobe Katsuhiro

    臨海副都心線の臨海大井町駅構築工事では、洪積層である東京粘土層、東京礫層内にシールドトンネルを構築する。実施工では、土圧、地盤変形、部材力などの動態観測を行い、その結果を施工にフィードバックすることにより安全施工に努め、無事、トンネルを構築することができた。 本報告では、シールド掘進に伴う周辺地盤の沈下状況について報告する。

    Proceedings of the Japan National Conference on Geotechnical Engineering JGS38(0), 1711-1712, 2003

    J-STAGE 

  • STUDY ON INFLUENCE OF BACK-FILL GROUTING ON SHIELD BEHAVIOR BASED ON KINEMATIC SHIELD MODEL

    SATO Yumi , SRAMOON Aphichat , SUGIMOTO Mitsutaka

    … From the viewpoint of the phenomena, it is considered that the influence of back-fill grouting on shield behavior results from the decrease of tail clearance due to hardening it inside the tail clearance and the decrease of overbreak around skin plate due to intruding it into the gap between ground and skin plate. …

    PROCEEDINGS OF TUNNEL ENGINEERING, JSCE (11), 37-42, 2001

    J-STAGE 

  • EFFECT OF CONTROLLED BLASTING AND THE EVALUATION OF THE INFLUENCE ON ROCK MASS AROUND TUNNEL

    TAMAI Akio , SHIRAHATA Hideki , NAGAHISA Kazumasa

    … Controlled blasting is generally used for producing a smooth final profile, a minimum of overbreak and a minimum of stressing or fracturing of the remaining rock. …

    PROCEEDINGS OF TUNNEL ENGINEERING, JSCE (2), 209-214, 1992

    J-STAGE 

  • Optimum design of smooth blasting in tunnelling hard rock.  [in Japanese]

    FURUKAWA Kohei , YOSHIMI Kenichi , SETOGUCHI Hiroaki , NAKAGAWA Koji

    … The proposed design method aims at minimize the total expense of the extra concrete cost in the region of overbreak and the labour cost required to remove the unbroken rock in the region of underbreak. … The overbreak and underbreak distributions used in the present study are the testing results obtained from Shiwa tunnel in Sanyo Highway. …

    Doboku Gakkai Ronbunshu 1987(379), 107-115, 1987

    J-STAGE 

  • Blast crack control and smooth blasting using notched blast hole technique.  [in Japanese]

    NAKAGAWA Koji , NISHIDA Tasuku , ONO Yuji , KAWAKAMI Jun

    … Tunnel blasting causes several undesirable effects, for example, overbreak at the perimeter and damage to or loosening of the remaining rock at the perimeter. …

    Doboku Gakkai Ronbunshu 1986(373), 131-138, 1986

    J-STAGE 

  • Smooth blasting in hard granite tunnel using an automatic drilling machine.  [in Japanese]

    NAKAGAWA Koji , FURUKAWA Kohei , SUZUKI Kohei , YOSHIMI Ken-ichi

    … In this study, the smoothblasting in hard granite tunnel was discussed with reference to the results of three field tests which aimed at the minimization of overbreak and underbreak. …

    Doboku Gakkai Ronbunshu 1986(367), 52-61, 1986

    J-STAGE  Cited by (1)

  • THE PATHOGENIC STRAINS OF <I>STAPHYLOCOCCUS AUREUS</I> LATELY ISOLATED IN JAPAN  [in Japanese]

    MATSUMOTO KEIZO , KUDO KAZUHARU , UZUKA YOSHIO , WATANABE KIWAO , NAGATAKE TSUYOSHI , RIKITOMI NAOTO , TAKAHASHI ATSUSHI , SUZUKI HIROSHI

    本邦における最近の病原性の明確な黄色ブドウ球菌343株について, 前報ではβ-lactam剤について報告したが, 今回はβ-lactam剤以外の21薬剤の感受性成績, β-lactam剤も含めた多剤耐性菌の現況およびその対策と治療について検討した。<BR>aminegiycoside剤耐性率は, streptemycin 89%, その他はhabekacinを除いて30-40%と高率で …

    CHEMOTHERAPY 32(8), 517-526, 1984

    J-STAGE 

  • Numerical Simulation Analysis of the Mechanism of Smooth Blasting  [in Japanese]

    NAKAGAWA Koji , SAKAMOTO Takeshi

    … Smooth blasting techniques are used to minimize overbreak (or fracturing of rock) beyond the designed boundary of main excavation areas. …

    Memoirs of the Faculty of Engineering,Yamaguchi University 32(2), p309-313, 1982-03

    IR 

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