DOI QR코드

DOI QR Code

A experimental study on the loads and temperature acting on the shaft of a disc cutter during linear rock cutting test

선형절삭실험 중 디스크커터 축에 작용하는 하중과 온도에 대한 실험적 연구

  • Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Young-Taek (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
  • 최순욱 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 장수호 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 박영택 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 이규필 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실) ;
  • 배규진 (한국건설기술연구원 SOC성능연구소 Geo-인프라연구실)
  • Received : 2013.04.16
  • Accepted : 2013.05.08
  • Published : 2013.05.31

Abstract

This study aimed to estimate the axial stress and torque on a shaft in a disc cutter. The corresponding inner temperature and the surface temperature of a cutter ring were also measured by using strain gauges and thermocouples during the linear cutting tests. The maximum values of the axial stress and torque were recorded to 11.3 MPa, $171kN{\cdot}m$ respectively. They have higher correlations with normal force rather than rolling force. The results of temperature measured by thermocouples during a linear cutting test showed that the rate of increase in temperature was below $0.2^{\circ}C$. When the cutter spacing is set to be 70 mm, the inner temperature and surface temperature of a disc cutter were $0.1^{\circ}C/m$, $0.15{\sim}0.17^{\circ}C/m$ respectively. Similarly, when the cutter spacing is 90 mm, the temperature values were $0.09^{\circ}C/m$, $0.13{\sim}0.23^{\circ}C/m$ respectively.

본 연구는 변형률게이지와 열전대, 적외선 열화상카메라를 사용하여 선형절삭실험 동안 디스크커터의 축에 발생하는 축응력과 토크를 측정하고 디스크커터의 내부와 외부의 온도를 파악하고자 하였다. 실험결과, 축응력과 토크의 최대값은 각각 11.3 MPa, $171kN{\cdot}m$로 측정되었으며, 축응력과 토크는 회전력보다는 디스크커터의 연직력과 상관성이 높은 것으로 나타났다. 선형절삭실험 동안 열전대로 측정한 결과, 디스크커터의 온도변화는 $0.2^{\circ}C$ 이내로 나타났다. 그러나 수행된 각 선형절삭작업이 연속적으로 이루어진다고 가정한 다음, 디스크커터의 내부온도와 커터 링 표면의 온도변화를 추정한 결과, 커터간격이 70 mm인 경우에는 각각 $0.1^{\circ}C/m$, $0.15{\sim}0.17^{\circ}C/m$로 예상되었고 커터간격이 90 mm인 경우에는 각각 $0.09^{\circ}C/m$, $0.13{\sim}0.23^{\circ}C/m$로 추정되었다.

Keywords

References

  1. Balci, C., Tumac, D. (2012), "Investigation into the effects of different rocks on rock cuttability by a V-type disc cutter", Tunnelling and Underground Space Technology, Vol. 30, pp. 183-193. https://doi.org/10.1016/j.tust.2012.02.018
  2. 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.
  3. 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. https://doi.org/10.9711/KTAJ.2012.14.3.197
  4. Entacher, M., Winter, G., Bumberger, T., Decker, K., Godor, I., Galler, R. (2012), "Cutter force measurement on tunnel boring machines-System design", Tunnelling and Underground Space Technology, Vol. 31, pp. 97-106. https://doi.org/10.1016/j.tust.2012.04.011
  5. KTA (2008), "Mechanized tunneling technologydesign", Korean Tunneling Association, CIR, pp. 261, 278.
  6. Rostami, J., Ozdemir, L. (1993) "A new model for performance prediction of hard rock TBMs", Proceedings of Rapid Excavation and Tunneling Conference (RETC), Boston, 13-17 June, pp 793-809
  7. Rostami, J., Ozdemir, L., Nilsen, B. (1996) "Comparison Between CSM and NTH Hard Rock TBM Performance Prediction Models", Proceedings of Annual Technical Meeting of the Institute of Shaft Drilling and Technology (ISDT), Las Vegas, NV, pp. 11.
  8. Rostami, J. (1997), "Development of a force estimation model for rock fragmentation with disc cutters through theoretical and physical measurement of crushed zone pressure", Ph.D Dissertation, Colorado School of Mines, Golden, Colorado, pp. 68-69.
  9. Roxborough, F.F., Phillips, H.R. (1975), "Rock Excavation by Disc Cutter", International Journal of Rock Mechnics and Mining Sciences and Geomechanics Abstracts, Vol. 12, pp. 361-366. https://doi.org/10.1016/0148-9062(75)90547-1
  10. Shanahan, A., Box, Z. (2011), "TBM Cutter Instrumentation at Malaysia's Pahang Selangor Water Tunnel and Canada's Niagara Tunnel Project", Proceedings of the World Tunneling Congress (WTC) 2011, Helsinki, Finland.

Cited by

  1. Performance estimation of conical picks with slim design by the linear cutting test (II): depending on skew angle variation vol.16, pp.6, 2014, https://doi.org/10.9711/KTAJ.2014.16.6.585
  2. Performance estimation of conical picks with slim design by the linear cutting test (I): depending on attack angle variation vol.16, pp.6, 2014, https://doi.org/10.9711/KTAJ.2014.16.6.573
  3. Performance estimation depending on the insert size of conical picks by linear cutting test vol.18, pp.2, 2016, https://doi.org/10.9711/KTAJ.2016.18.2.221
  4. Manufacturing of an earth pressure balanced shield TBM cutterhead for a subsea discharge tunnel and its field performance analysis vol.16, pp.2, 2014, https://doi.org/10.9711/KTAJ.2014.16.2.161
  5. Comparative analysis of cutter acting forces and axial stresses of single and double disc cutters by linear cutting tests vol.16, pp.2, 2014, https://doi.org/10.9711/KTAJ.2014.16.2.181