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

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
권호 표지
DOI QR코드

DOI QR Code

Refurbishment of a 3.6 m earth-pressure balanced shield TBM with a domestic cutterhead and its field verification

국산 커터헤드를 장착한 직경 3.6 m 토압식 쉴드TBM의 제작과 현장적용성 분석

  • Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae Ho (Geotechnical Engineering Research Division, Korea Institute of Civil Engineering and Building Technology) ;
  • Kwon, Jun-Yong (DongAh Geological Engineering Co., Ltd.) ;
  • Shin, Min-Sik (DongAh Geological Engineering Co., Ltd.)
  • Received : 2015.06.29
  • Accepted : 2015.07.21
  • Published : 2015.07.31
Download PDF
⟨ Previous Next ⟩

Abstract

A domestic cutterhead with the diameter of 3.6 m was designed and manufactured in this study. Then, it was attached to an existing earth-pressure balanced shield TBM to excavate a cable tunnel with the length of 1,275 m. Especially, the procedures for TBM cutterhead design and its corresponding performance prediction were also summarized. From field data analyses of the refurbished shield TBM, its maximum advance rate was recorded as 14.4 m/day. Penetration depths of disc cutters were found to be approximately 4 mm/rev, which is equal to the maximum penetration depth designed for the strongest rock strength condition in the target tunnel. Every TBM operating thrust and cutter normal force during TBM driving was much smaller than their corresponding maximum capacities. When cutter acting forces recorded in the field were analyzed, their prediction errors by the CSM model were very high for weak rock conditions. In addition, rock strength showed very close relationships with cutter normal force and penetration depth.

본 연구에서는 직경 3.6 m의 국산 커터헤드를 설계 제작하고 이를 기존의 토압식 쉴드TBM에 적용하여 연장이 1,275 m인 전력구 터널의 굴착공사를 수행하였다. 특히, 본 연구에서는 TBM 커터헤드의 설계절차와 그에 따른 TBM 굴착성능을 예측하기 위한 방법들을 정리하였다. 제작된 국산 커터헤드 장착 토압식 쉴드TBM의 실제 굴진자료를 분석한 결과, 최대 굴진율은 14.4 m/day이었으며 암석의 일축압축강도가 가장 큰 조건에 대해 커터헤드의 설계단계에서 제시한 4 mm/rev 내외로 디스크커터의 관입깊이가 관리되었음을 확인하였다. 또한 TBM의 구동 추력과 디스크커터의 연직력은 각각 TBM의 최대 추력 용량과 디스크커터의 최대 허용 연직력이하로 나타났다. 현장에서 측정된 디스크커터의 작용력을 분석한 결과, 연암 조건에서 CSM모델의 예측 오차가 크게 나타남을 확인하였다. 마지막으로 암석의 일축압축강도와 디스크커터의 연직력 및 커터 관입깊이는 밀접한 상관관계를 나타내었다.

Keywords

References

  1. Ates, U., Bilgin, N., Copur, H. (2014), Estimating torque, thrust and other design parameters of different type TBMs with some criticism to TBMs used in Turkish tunneling projects, Tunnelling and Underground Space Technology, Vol. 40, pp. 46-63. https://doi.org/10.1016/j.tust.2013.09.004
  2. Bae, G.-J., Chang, S.-H., Park, Y.-T., Choi, S.-W., Lee, G.-P., Kwon, J.-Y., Han, K.-T. (2014), "Manufacturing of an earth pressure balanced shield TBM cutterhead for a subsea discharge tunnel and its field performance analysis", Journal of Korean Tunnelling and Underground Space Association, Vol. 16, No. 2, pp. 161-172 (in Korean). https://doi.org/10.9711/KTAJ.2014.16.2.161
  3. Bae, G.-J., Chang, S.-H. (2006), "Improvement and evaluation of TBM performance by considering construction risk", Proceedings of the 7th Symposium on Mechanized Tunnelling Technology, pp. 11-45 (in Korean).
  4. Cho, Jung-Woo, Jeon, Seokwon, Jeong, Ho-Yeong, Chang, Soo-Ho (2013), Evaluation of cutting efficiency during TBM disc cutter excavation within a Korean granitic rock using linear-cuttingmachine testing and photogrammetric measurement, Tunnelling and Underground Space Technology, Vol. 35, pp. 37-54. https://doi.org/10.1016/j.tust.2012.08.006
  5. Chang, S.-H., Choi, S.-W., Park, Y.-T., Lee, G.-P., Bae, G.-J. (2012), "Characterization of the deformation of a disc cutter in linear rock cutting test", Journal of Korean Tunnelling and Underground Space Association, Vol. 14, No. 3, pp. 197-213 (in Korean). https://doi.org/10.9711/KTAJ.2012.14.3.197
  6. Chang, S.-H., Choi, S.-W., Lee, G.-P., Bae, G.-J. (2011), "Rock TBM design model derived from the multi-variate regression analysis of TBM driving data", Journal of Korean Tunnelling and Underground Space Association, Vol. 13, No. 6, pp. 531-555 (in Korean).
  7. Gutter, W., Jagger, M., Rudigier, G., Weber, W. (2011), "TBM versus NATM from the contractor's point of view", Geomechanics and Tunnelling, Vol. 4, No. 4, 327-336. https://doi.org/10.1002/geot.201100022
  8. Huo, J., Sun, W., Chen, J., Zhang, X. (2011), Disc cutters plane layout design of the full-face rock tunnel boring machine (TBM) based on different layout patterns, Computers & Industrial Engineering, Vol. 61, pp. 1209-1225. https://doi.org/10.1016/j.cie.2011.07.011
  9. Jodl, H.G., Resch, D. (2011), "NATM and TBM - comparison with regard to construction operation", Geomechanics and Tunnelling, Vol. 4, No. 4, 337-345. https://doi.org/10.1002/geot.201100019
  10. MLIT (Ministry of Land, Infrastructure and Transport) (2011), Annual Report - Development of optimized TBM cutterhead design method and high-performance disc cutter.
  11. Rostami, J. (2013), "Study of pressure distribution within the crushed zone in the contact area between rock and disc cutters", International Journal of Rock Mechanics & Mining Sciences, Vol. 57, pp. 172-186. https://doi.org/10.1016/j.ijrmms.2012.07.031
  12. Rostami, J. (2008), "Hard Rock TBM Cutterhead Modeling for Design and Performance Prediction", Geomechanik und Tunnelbau, Vol. 1, pp. 18-28. https://doi.org/10.1002/geot.200800002
  13. Rostami, J., Ozdemir, L., Nisen, B. (1996), "Comparison Between CSM and NTH Hard Rock TBM Performance Prediction Models", Proc. of ISDT 1996, Las Vegas NV, pp. 1-11.
  14. Rostami, J. Ozdemir, L. (1993), "A New Model for Performance Prediction of Hard Rock TBMs", Proc. of Rapid Excavation and Tunneling Conference (RETC), Boston, USA, pp. 793-809.
  15. Wang, L., Gong. G., Shi, H., Yang, H. (2012), "Modeling and analysis of thrust force for EPB shield tunneling machine, Automation in Construction", Vol. 27, pp. 138-146. https://doi.org/10.1016/j.autcon.2012.02.004