Browse > Article
http://dx.doi.org/10.9711/KTAJ.2021.23.1.001

Numerical analysis on the estimation of optimal disc cutter angle in transition cutter zone  

Lee, Sang Yun (Dept. of Civil Engineering, Inha University)
Song, Ki-il (Dept. of Civil Engineering, Inha University)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.23, no.1, 2021 , pp. 1-12 More about this Journal
Abstract
In the design of a tunnel boring machine (TBM), the excavation efficiency of the equipment depends on the design of the cutter head, which is directly in contact with the ground. Especially, the allocation of disc cutter is crucial issue. Disc cutters can be divided into center cutter zone, inner cutter zone and transition cutter zone depending on where they are placed. Many studies have been conducted to identify optimal cutting conditions for face cutters. However, research to determine the optimal cutting conditions for the transition cutter has been relatively incomplete. In this study, to identify the optimal cutting conditions for the transition cutter, numerical analysis using discrete element method was performed, and the specific energy curve according to the angle between the transition cutters was drawn to find out the optimum cutting conditions. The results show that the angle between the transition cutters showing minimum specific energy in the transition cutter zone is 9°. Transition cutter zone was divided into three sections according to the slope angle of the transition cutter. It is also found that, the greater the slope angle of the transition cutter. This finding shows good agreement with the present design of transition cutter zone.
Keywords
Transition cutter; TBM; LCM simulation; DEM; PFC3D;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Itasca Consulting Group (2019), PFC3D, User's Manual. Inc, Minneapolis, USA.
2 KICT (2007), Development of optimized excavation model for mechanized construction of rapidly tunnel, Research Report, Retrieved from KR.
3 KICT (2015), Development of optimized TBM cutterhead design method and high-performance disc cutter, Retrieved from KR.
4 KTA (2008), Tunnel Mechanization Construction Design (1 ed.), CIR, Seoul, pp. 255-313.
5 Lee, S.Y., Song, K.I., Jung, J.H. (2020), "A numerical study on the optimum spacing of disc cutters considering rock strength and penetration depth using discrete element method", Journal of Korean Tunnelling and Underground Space Association, Vol. 22, No. 4, pp. 383-399.   DOI
6 Potyondy, D.O., Cundall, P.A. (2004), "A bonded-particle model for rock", International Journal of Rock Mechanics and Mining Sciences, Vol. 41, No. 8, pp. 1329-1364.   DOI
7 Qi, G., Zhengying, W., Hao, M. (2016), "An experimental research on the rock cutting process of the gage cutters for rock tunnel boring machine (TBM)", Tunnelling and Underground Space Technology, Vol. 52, pp. 182-191.   DOI
8 Rostami, J. (1997), "Development of a force estimation model for rock fragmentation with disc cutters through theoretical modeling and physical measurement of crushed zone pressure", Doctorate, Colorado School of Mines, pp. 1-242.
9 Rostami, J., Ozdemir, L. (1993), "A new model for performance prediction of hard rock TBMs", Proceedings of the 1993 Rapid Excavation and Tunneling Conference, Boston, pp. 793-809.
10 Shin, J.H. (2015), Geomechanics & Engineering-Analysis and Design II: CIR Co. Inc., Seoul, pp. 159-350.
11 Zhang, Z., Aqeel, M., Li, C., Sun, F. (2019), "Theoretical prediction of wear of disc cutters in tunnel boring machine and its application", Journal of Rock Mechanics and Geotechnical Engineering, Vol. 11, No. 1, pp. 111-120.   DOI