한국터널지하공간학회 논문집 (Journal of Korean Tunnelling and Underground Space Association)

  • 제24권6호
  • /
  • Pages.553-581
  • /
  • 2022
  • /
  • 2233-8292(pISSN)
  • /
  • 2287-4747(eISSN)
한국터널지하공간학회 (Korean Tunnelling and Underground Space Association)
권호 표지
DOI QR코드

DOI QR Code

EPB 쉴드 TBM 커터 교체 설계 및 시공 사례 분석

Case study of design and construction for cutter change in EPB TBM tunneling

  • 이재원 (현대건설 기술연구소) ;
  • 강성욱 (현대건설 대곡-소사 복선전철 제2공구) ;
  • 정재훈 (현대건설 기술연구소) ;
  • 강한별 (현대건설 기술연구소) ;
  • 신영진 (현대건설 기술연구소)
  • 투고 : 2022.10.07
  • 심사 : 2022.11.18
  • 발행 : 2022.11.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

TBM (Tunnel Boring Machine)이 터널 산업에 도입된 이후로 안전성과 친환경의 이점으로 TBM의 사용이 전 세계적으로 증가하였다. 암반 및 토사 지반을 굴착하는 TBM 터널에서의 주요 비용 중 하나는 손상되거나 마모된 커터의 교체로 볼 수 있다. 커터의 교체는 시간과 비용에 큰 영향을 끼치는 작업이며 TBM 가동률과 굴진율을 크게 감소시킬 수 있다. 따라서 커터의 수명을 정확하게 평가하는 것은 공기와 비용의 측면에서 매우 중요하다. 그러나 복합 지반을 포함하여 토사 구간, 암반구간에서 커터 마모에 대한 예측은 매우 복잡하고 명확하지 않다. 이에 따라 커터 마모에 대한 다양한 예측 모델이 개발 및 도입되었지만 이러한 불확실성으로 인해 가변적인 결과를 나타낸다. 본 연구에서는 커터 마모 예측 모델을 제시하기 보다는 커터 교체의 설계 및 시공 사례 연구를 소개하고 분석했다. 커터는 지반 조건, TBM 장비 및 운전의 영향을 많이 받으므로 불확실성과 한계를 감안하면 신뢰성 있는 예측 모델을 제안하는 것은 매우 어렵기 때문에 오히려 실제 사례를 분석하고 이에 대한 자료 공유가 더 실용적이다. 커터 교체에 대한 예측과 결과 간의 차이를 확인하고 심도 있게 분석하였다.

Shortly after tunnel boring machine (TBM) was introduced in the tunneling industry, the use of TBM has surprisingly increased worldwide due to its performance together with the benefit of being safely and environmentally friendly. One of the main cost items in the TBM tunneling in rock and soil is changing damaged or worn cutters. It is because that the cutter change is a time-consuming and costly activity that can significantly reduce the TBM utilization and advance rate and has a major effect on the total time and cost of TBM tunneling projects. Therefore, the importance of accurately evaluating the cutter life can never be overemphasized. However, the prediction of cutter wear in soil, rock including mixed face is very complex and not yet fully clarified, subsequently keeping engineers busy around the world. Various prediction models for cutter wear have been developed and introduced, but these models almost usually produce highly variable results due to inherent uncertainties in the models. In this study, a case study of design and construction of disc cutter change is introduced and analyzed, rather than proposing a prediction model of cutter wear. As the disc cutter is strongly affected by the geological condition, TBM machine characteristic and operation, authors believe it is very hard to suggest a generalized prediction model given the uncertainties and limitations therefore it would be more practical to analyze a real case and provide a detailed discussion of the difference between prediction and result for the cutter change. By doing so, up-to-date idea about planning and execution of cutter change in practice can be promoted.

키워드

과제정보

이 논문은 2022년도 정부(산업통상자원부)의 재원으로 사용후핵연료관리핵심기술개발사업단 및 산업부 한국에너지기술평가원의 지원을 받아 수행된 연구 사업의 일환으로 수행되었습니다(No. 2021040101003C). 이에 감사드립니다.

참고문헌

  1. AFNOR (1990), Aggregates: Abrasiveness test and grindability - Paris, NF P18-579, Regulatory French Association.
  2. Bruland, A. (1998), Hard rock tunnel boring - Advance rate and cutter wear, Project report 1B-98, The Norwegian University of Science and Technology, Vol. 3, pp. 27-32.
  3. Chang, S.H., Choi, S.W., Lee, G.P., Bae, G.J. (2011), "Statistical analysis of NTNU test results to predict rock TBM performance", Journal of Korean Tunnelling and Underground Space Association, Vol 13, No. 3, pp. 243-260. https://doi.org/10.9711/KTAJ.2011.13.3.243
  4. Farrokh, E., Kim, D.Y. (2018), "A discussion on hard rock TBM cutter wear and cutterhead intervention interval length evaluation", Tunnelling and Underground Space Technology, Vol. 81, pp. 336-357. https://doi.org/10.1016/j.tust.2018.07.017
  5. Frenzel, C. (2011), "Disc cutter wear phenomenology and their implications on disc cutter consumption for TBM", Proceedings of the 45th US Rock Mechanics/Geomechanics Symposium, San Francisco, pp. 1-7.
  6. Gehring, K. (1995), "Prognosis of advance rates and wear for underground mechanized excavations", Felsbau Vol. 13, No. 6, 439-448.
  7. Jakobsen, P.D., Langmaack, L., Dahl, F., Breivik, T. (2013), "Development of the Soft Ground Abrasion Tester (SGAT) to predict TBM tool wear, torque and thrust", Tunnelling and Underground Space Technology, Vol. 38, pp. 398-408. https://doi.org/10.1016/j.tust.2013.07.021
  8. JSCE (2007), Standard specification for tunneling-2006: shield tunnels, Japan Society of Civil Engineers, pp. 140-197.
  9. Kim, D.Y., Farrokh, E., Jung, J.H., Lee, J.W., Jee, S.H. (2017), "Development of a new test method for the prediction of TBM disc cutters life", Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 3, pp. 475-488. https://doi.org/10.9711/KTAJ.2017.19.3.475
  10. Kim, D.Y., Shin, Y.J., Jung, J.H., Kang, H.B. (2018), "Case study: application of NAT (new abrasion tester) for predicting TBM disc cutter wear and comparison with conventional methods", Journal of Korean Tunnelling and Underground Space Association, Vol. 20, No. 6, pp. 1091-1104. https://doi.org/10.9711/KTAJ.2018.20.6.1091
  11. Ko, T.Y., Yoon, H.J., Son, Y.J. (2014), "A comparative study on the TBM disc cutter wear prediction model", Journal of Korean Tunnelling and Underground Space Association, Vol. 16, No. 6, pp. 533-542. https://doi.org/10.9711/KTAJ.2014.16.6.533
  12. Koppl, F., Thuro, K. (2013), "Cutting tool wear prognosis and management of wear-related risks for mix-shield TBM in soft ground", Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, pp. 1739-1742.
  13. Koppl, F., Thuro, K., Thewes, M. (2015), "Suggestion of an empirical prognosis model for cutting tool wear of Hydroshield TBM", Tunnelling and Underground Space Technology, Vol. 49, pp. 287-294. https://doi.org/10.1016/j.tust.2015.04.017
  14. Lee, S.D., Jung, H.Y., Jeon, S.W. (2012), "Determination of rock abrasiveness using Cerchar abrasiveness test", Tunnel and Underground Space, Vol. 22, No. 4, pp. 284-295. https://doi.org/10.7474/TUS.2012.22.4.284
  15. Nilsen, B., Dahl, F., Holzhauser, J., Raleigh, P. (2006), "SAT - NTNU's new soil abrasion test", Tunnels and Tunnelling International, Vol. 38, No. 5, pp. 43-45.
  16. Rostami, J. (1993), "A new model for performance prediction of hard rock TBMs", Proceedings of the Rapid Excavation and Tunneling Conference, Boston, pp. 793-809.
  17. Rostami, J., Ozedemir, L., Bruland, A., Dahl, F. (2005), "Review of issues related to Cerchar abrasivity testing and their implications on geotechnical investigations and cutter cost estimates", Proceedings of the Rapid Excavation and Tunneling Conference, Littelton (Society for Mining, Metallurgy and Exploration), pp. 738-751.
  18. Yang, Z., Sun, Z., Fang, K., Jiang, Y., Gao, H., Bai, Z. (2021), "Cutting tool wear model for tunnel boring machine tunneling in heterogeneous grounds", Bulletin of Engineering Geology and the Environment, Vol. 80, pp. 5709-5723. https://doi.org/10.1007/s10064-021-02298-z
  19. Yu, S.H. (2007), A study on rock cutting behavior by TBM disc cutter, Master's Thesis, Seoul University, pp. 21-74.