DOI QR코드

DOI QR Code

Comparative analysis of cutter acting forces and axial stresses of single and double disc cutters by linear cutting tests

선형절삭시험에 의한 더블디스크커터와 싱글디스크커터의 커터 작용력과 축응력에 대한 실험적 평가

  • 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 : 2014.03.05
  • Accepted : 2014.03.18
  • Published : 2014.03.30

Abstract

This study aims to evaluate cutter acting forces as well as axial stresses and torques in the shaft of two kinds of disc cutters including a single disc cutter and a double disc cutter with the same cutter ring geometry in a series of linear cutting tests. From the tests, the mean values of normal forces and rolling forces acting on the double disc cutter were approximately twice as high as those from the single disc cutter. Similarly, the mean values of axial stresses in the shaft of the double disc cutter were also twice as high as those from the single disc cutter even though the comparisons of torques from two kinds of disc cutters were insignificant since they showed very low values. However, it is necessary to take the durability of a tapered roller bearing used for the double disc cutter into high consideration since the average normal force from the double disc cutter exceeds the allowable force for a disc cutter with the diameter of 432 mm (17 inches). Finally, there is no practical problem in terms of axial stresses in the shaft of the double disc cutter since they are much lower than the yielding stress of the cutter shaft material, even though the axial stresses in the shaft of the double disc cutter are approximately twice as high as those from the single disc cutter.

본 연구는 선형절삭시험 중에 동일한 커터 링 형상을 가진 더블디스크커터와 싱글디스크커터에 발생하는 커터작용력과 각 디스크커터 축에 발생하는 축응력 및 토크를 평가하였다. 선형절삭시험 결과, 선형절삭실험 중에 발생한 더블디스크커터의 연직력과 회전력의 평균값은 싱글디스크커터의 약 두 배 내외인 것으로 측정되었다. 더블디스크커터의 축에 작용하는 축응력의 평균값 역시 연직력과 마찬가지로 싱글디스크커터의 두 배 정도로 나타났지만, 토크의 경우에는 전체적으로 낮은 측정값을 보여 비교의 의미가 없는 것으로 판단되었다. 하지만 더블디스크커터의 연직력의 평균값이 직경 432 mm(17인치) 디스크커터의 허용하중을 상회하기 때문에 테이퍼 롤러 베어링의 내구성능에 대한 검토가 필요한 것으로 판단되었다. 또한 더블디스크커터 축에 작용하는 축응력은 싱글디스크커터의 약 두 배 정도로 발생하였지만, 일반적으로 사용하는 디스크커터 축 재료의 항복강도를 고려할 때 적용 상에 문제가 없는 것으로 나타났다.

Keywords

Acknowledgement

Supported by : 한국건설교통기술평가원

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. Bilgin, N., Balci, C., Tuncdemir, H., Eskikaya, Ş, Akgul, M., Algan, M. (1999), "The Performance Prediction of A TBM in Difficult Ground Condition", AFTES-Journeesd'Etudes Internaltionales de Paris:, pp. 115-121.
  3. 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.
  4. 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
  5. Chang, S.H., Choi, S.W., Park, Y.T., Lee, G.P., Bae, G.J. (2013), "Experimental evaluation of the effects of cutting ring shape on cutter acting forces in a hard rock", Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 225-235. https://doi.org/10.9711/KTAJ.2013.15.3.225
  6. Choi, S.W., Chang, S.H., Park, Y.T., Lee, G.P., Bae, G.J. (2013), "An Experimental study on the loads and temperature acting on the shaft of a disc cutter during linear rock cutting test", Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 3, pp. 237-251. https://doi.org/10.9711/KTAJ.2013.15.3.237
  7. 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.
  8. Gertsch, R., Gertsch, L., Rostami, J. (2007), "Disc cutting tests in colorado red granite: Implications for TBM performance prediction", International Journal of Rock Mechanics & Mining Sciences, Vol. 44, pp. 238-246. https://doi.org/10.1016/j.ijrmms.2006.07.007
  9. KS (2007), Cr-Mo Steel (KS D 3711:2007), KS.
  10. KTA (2008), Series of tunnel engineering 3- mechanized tunneling technology-design, Korean Tunneling Association, CIR, pp. 261.
  11. Ozdemir, L., Nilsen, B. (1993), "Hard rock tunnel boring prediction and field performance", Rapid Excavation Tunneling Conference (RETC) Proceedings, Boston, USA.
  12. 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.
  13. 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.
  14. 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
  15. Snowdon, R.A., Ryley, M.D., Temporal, J. (1982), "A study of disc cutting in selected british rocks", Int. J. Rock Mech. Min. Sci. & Geomech. Abstr., Vol. 19, pp. 107-121.

Cited by

  1. 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
  2. Comparison and discussion on fragmentation behavior of soft rock in multi-indentation tests by a single TBM disc cutter vol.57, 2016, https://doi.org/10.1016/j.tust.2016.02.021
  3. Investigation on disc cutter behaviors in cutting rocks of different strengths and reverse estimation of rock strengths from experimental cutting forces pp.2116-7214, 2018, https://doi.org/10.1080/19648189.2018.1512904
  4. Full-scale linear cutting test in Chongqing Sandstone and the comparison with field TBM excavation performance pp.1861-1133, 2018, https://doi.org/10.1007/s11440-018-0702-1
  5. Comparison between experimental and semi-theoretical disc cutter cutting forces: implications for frame stiffness of the linear cutting machine vol.11, pp.11, 2018, https://doi.org/10.1007/s12517-018-3593-4
  6. Full-Scale Rotary Cutting Test to Study the Influence of Disc Cutter Installment Radius on Rock Cutting Forces vol.51, pp.7, 2018, https://doi.org/10.1007/s00603-018-1460-y
  7. Full-Scale Linear Cutting Tests in Chongqing Sandstone to Study the Influence of Confining Stress on Rock Cutting Forces by TBM Disc Cutter vol.51, pp.6, 2018, https://doi.org/10.1007/s00603-018-1412-6