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1998 Fiscal Year Final Research Report Summary

Development of the borehole television system using the fluorescent technique

Research Project

Project/Area Number 09555320
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 資源開発工学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

NISHIYAMA Takashi  Faculty of Energy Science, Kyoto University, Professor, エネルギー科学研究科, 教授 (70026227)

Co-Investigator(Kenkyū-buntansha) CHEN Youqing  Faculty of Energy Science, Kyoto University, Research Associate, エネルギー科学研究科, 助手 (80293926)
KUSUDA Hiromu  Faculty of Energy Science, Kyoto University, Associate Professor, エネルギー科学研究科, 助教授 (90169988)
Project Period (FY) 1997 – 1998
Keywordsfluorescent technique / borehole television system / image processing / microcrack / ultraviolet light / boring / grouting
Research Abstract

It is very difficult to identify microcracks using conventional borehole television systems, because there are no characteristic differences in microcracks from other materials of rocks. Therefore, we applied the fluorescent technique, which is widely used to examine microcracks and pore spaces under a microscope for the borehole television system.
A new circular ultraviolet lamp was designed to observe microcracks inside boreholes. Many hidden microcracks that were not recognized by a conventional borehole television were disclosed under ultraviolet light, in the laboratory setting. The fluorescent approach was performed for visualization of grouting processes. The distributions of various grout mixtures containing fluorescent substances were clearly visualized under ultraviolet light, using a borehole television system.
Two field tests, evaluation of a loosened zone in a rock mass caused by widening of the Maiko Tunnel in Hyogo prefecture and analysis of grouting mechanisms in the limb tunnel of Yokotake Dam in Kyushu, were carried out. Formation of new microcracks and/or progression of microcracks inside boreholes were observed after widening of the tunnels. Many microcracks filled with grout mixed with three different coloring substances were clearly visualized under ultraviolet light using this system.
It is concluded that the borehole television system combined with the fluorescent technique has been successfully developed and is very useful for identification of microcracks or grout containing fluorescent substances inside horeholes.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 西山 孝: "蛍光法とボアホールテレビジョンシステムを用いた孔壁の割り目の抽出"応用地質. 36. 46-51 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西山 孝: "蛍光法によるグラウト浸透状況の可視化"土と基礎. 47. 29-32 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 陳 友晴: "Image Analysis of Microcracks in Rocks Using Software AVS"Proceedings of the '99 Japan-Korea Joint Symposium on Rock Engineering. 549-556 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 陳 友晴: "A fluorescent approach to the identification of grout injected into fissures and pore spaces"Engineering Geology. (in printing). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takashi Nishiyama: "The Borehole Television System by the Fluorescent Method"Journal of the Japan Society of Engineering Geology. Vol.36, No.6. 46-51 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takashi Nishiyama: "Fluorescent Approach to Visualize Grout Injected into Rock Masses"Tsuchi to Kiso. Vol.47, No.3. 29-32 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Youqing CHEN: "Image Analysis of Microcracks in Rocks Using Software AVS"Proceeding of the '99 Japan-Korea Joint Symposium on Rock Engineering. 549-556 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Youqing Chen: "A fluorescent approach to the identification of grout injected into fissures and pore spaces"Engineering Geology. (in printing). (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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