터널과지하공간 (Tunnel and Underground Space)

  • 제29권3호
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  • Pages.148-156
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  • 2019
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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언더커팅 개념을 적용한 암반절삭기술의 현황 분석

Current Status of Rock Cutting Technique Using Undercutting Concept

  • 정호영 (서울대학교 공과대학 에너지시스템공학부) ;
  • 최승범 (서울대학교 공과대학 에너지시스템공학부) ;
  • 전석원 (서울대학교 공과대학 에너지시스템공학부)
  • Jeong, Hoyoung (Department of Energy Systems Engineering, Seoul National University) ;
  • Choi, Seungbeom (Department of Energy Systems Engineering, Seoul National University) ;
  • Jeon, Seokwon (Department of Energy Systems Engineering, Seoul National University)
  • 투고 : 2019.06.17
  • 심사 : 2019.06.26
  • 발행 : 2019.06.30
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초록

최근 도심지에서의 터널 및 지하공간 개발에 있어 TBM을 비롯한 다양한 형태의 기계식 굴착장비의 적용이 증가하고 있다. 한편 기존의 전통적인 암석절삭방식에서 변형된 언더커팅방식 적용한 암반의 기계식 굴착공법에 대한 연구가 선진국을 중심으로 수행되어 소개된 바 있다. 따라서 국내에서도 기존의 암반기계굴착에 대한 연구를 지속적으로 수행함과 동시에 최신 기술에 대한 연구가 요구된다. 본 연구에서는 언더커팅에 대한 기초연구로서 해당 기술의 원리 및 굴착방식에 대한 소개와 더불어 해외 선진 기관들의 연구 현황을 조사하였다. 언더커팅공법은 터널 및 지하공간의 개발을 위한 단독공법으로 적용이 가능할 뿐만 아니라 터널의 확공 및 기존 공간의 확장을 위한 보조공법으로의 활용성도 우수한 것으로 판단되었다.

In urban area, the use of mechanical excavators (e.g., TBM and roadheader) has been increasing in construction of tunnelling and underground space. The undercutting technology, which is modified from the conventional rock-cutting concept, has been developed by advanced countries. Therefore, research on the latest technology of mechanical excavation is required, and keeping carrying out research on conventional mechanical tunneling methods at the same time. In this study, as a fundamental study of the undercutting technique, the principle and concept of the undercutting were introduced, as well as the current status of the research of advanced countries. The undercutting is applicable as a full-face excavation method for the tunnels and underground spaces, as well as an auxiliary(partial-face excavation) method for extension of the existing tunnels.

키워드

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Fig. 1. Rock cutting mechanism of conventional disc cutter

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Fig. 2. Rock cutting mechanism of undercutting; (a) conceptual diagram, and (b) example of its application (Modified from Van Dan Berg, 2014)

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Fig. 3. Pictures of undercutting machines manufactured by Wirth; (a) CMM, and (b) MTM

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Fig. 4. Pictures of TBE manufactured by Wirth; (a) conceptual design, and (b) cutter head

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Fig. 5. Pictures of longwall shearers; (a) ARM-1100 by Sandvik, and (b) HRM by CAT

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Fig. 6. Oscillated Disc Cutting (Ghamgosar et al., 2015)

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Fig. 7. Pictures of ADC; (a) trajectory of ADC, and (b) lab-scale equipment (Dehkoda and Detournay, 2017)

참고문헌

  1. CAT website, online information: https://www.cat.com/en_US/campaigns/awareness/rock- straight-system.html
  2. Cho, J., Jeon, S., Yu, S., and Chang, S., 2010, Optimum spacing of TBM disc cutter: A numerical simulation using the three-dimensional dynamic fracturing method. Tunnelling and Underground Space Technology, 25(3), pp. 230-244. https://doi.org/10.1016/j.tust.2009.11.007
  3. Dehkhoda, S., and Detournay, E., 2017, Mechanics of actuated disc cutting. Rock Mechanics and Rock Engineering, 50(2), pp. 465-483. https://doi.org/10.1007/s00603-016-1121-y
  4. Ghamgosar, M., Erarslan, N., 2015, A numerical study on oscillating disc cutting (ODC) technology for hard rock cutting, Proceedings of International Symposium on Rock Mechanics Congress 2015, Montreal, Canada.
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  7. Jeong, H., Jeon, S., Cho, J., Chang, S., and Bae, G., 2011, Assessment of cutting performance of a TBM disc cutter for anisotropic rock by linear cutting test. Tunnel & Underground Space, 21(6), pp. 508-517. https://doi.org/10.7474/TUS.2011.21.6.508
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  14. Weber, W., 1995, Driving different cross-sections using undercutting technology- the development of a new type of cutting machine. Tunnels and Tunnelling, pp. 74-80.