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Study on a Wire Saw Rock Cutting Model for Tunnel Excavation and Cutting Performance Improvement

터널굴착용 와이어쏘 암반절삭 모델 구축 및 절삭성능 향상 연구

  • Lee, Jin-Ho (High-speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Ahn, Sung-Kwon (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Lee, Kyoung-Chan (High-speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Bang, Choon-Seok (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Sagong, Myung (Planning and Strategy Center, Korea Railroad Research Institute)
  • 이진호 (한국철도기술연구원 고속철도연구본부) ;
  • 안성권 (한국철도기술연구원 신교통연구본부) ;
  • 이경찬 (한국철도기술연구원 고속철도연구본부) ;
  • 방춘석 (한국철도기술연구원 신교통연구본부) ;
  • 사공명 (한국철도기술연구원 기획전략본부)
  • Received : 2015.05.26
  • Accepted : 2015.07.23
  • Published : 2015.10.01

Abstract

In tunnel excavation using blast, the wire saw rock cutting method generates a discontinuity perimeter around the center cut, and thus prevents blast vibration propagation to reduce vibration and noise. Therefore, the method is expected to be easy to use and economical compared with other methods. In this paper, the cutting mechanism of wire saw in tunnel excavation is investigated. A model describing the changes in cutting depth and wire saw shape inside a rock during cutting is established and validated for this purpose. Through a simulation using the model, the important characteristics of wire saw cut are investigated, and the influences of cutting conditions, such as wire saw tension, wire saw speed, feed speed, depth, and diameter of boring, on cutting performance are also examined. A method to improve the cutting performance is proposed based on the results.

발파를 이용한 터널굴착시, 와이어쏘를 이용하여 심빼기 부분 외곽에 불연속면을 발생시켜 발파진동을 차단함으로써 소음 및 진동을 저감시키고자 하는 방법은 타 방법에 비해 시공이 간편하고 경제적일 것으로 예상된다. 본 논문에서는 터널굴착용 와이어쏘의 절삭 메커니즘을 규명하기 위하여 시간에 따른 절삭 깊이 변화와 절삭 중 암석 내부의 와이어쏘 곡선 형태를 파악할 수 있는 절삭 모델을 구축하고 검증하였다. 구축된 모델을 이용한 시뮬레이션을 통해 터널굴착용 와이어쏘 절삭의 특징을 살펴보고, 와이어쏘 인장력, 와이어쏘 속도, 피드 속도, 천공 깊이 및 천공 직경과 같은 주요 조건들이 절삭 성능에 미치는 영향을 검토하였으며, 이러한 검토 결과를 바탕으로 절삭 성능을 높이기 위한 방안을 제시하였다.

Keywords

References

  1. Ahn S. K., 2014, "Low Cost-High Performance Technology Development for Railroad Infrastructure," KRRI Research Report 2014-106, Korea Railroad Research Institute, pp. 316-429.
  2. Gustafsson N., 2011, "Wire cutting as a complement to drill and blast in vibration sensitive environments," Master's Thesis, Chalmers University of Technology.
  3. Liedke T., Kuna M., 2011, "A macroscopic mechanical model of the wire sawing process," International Journal of Machine Tools & Manufacture, 51, pp. 711-720. https://doi.org/10.1016/j.ijmachtools.2011.05.005
  4. Palathra T., Adomaitis R., 2008, "Process Modeling of a Wire Saw Operation," ISR Technical Report 2008-9, Institute for Systems Research.
  5. Lee J. H., Sakong M., Lee K. C., Ahn S. K., 2015, "Jig Apparatus for Tunnel Excavation using Wire-Saw," KR-10-1508205, 27th of May, pp. 11-13.
  6. http://www.diaquipdiamondtools.com
  7. Foretec C&S Corporation, 2014, "Concrete Demolishing System(Model No. FT-DX120)," User's Manual.
  8. Preston F. W., 1927, Journal of the Society of Glass Technology, 11 247.