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Engineering    2017, Vol. 3 Issue (6) : 892 -904     https://doi.org/10.1016/j.eng.2017.12.009
Research |
A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines
Jamal Rostami1(),Soo-Ho Chang2
1. Excavation Engineering and Earth Mechanics Institute, Department of Mining Engineering, Colorado School of Mines, Golden, CO 80401, USA
2. Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
Abstract
Abstract  

The success of a tunnel-boring machine (TBM) in a given project depends on the functionality of all components of the system, from the cutters to the backup system, and on the entire rolling stock. However, no part of the machine plays a more crucial role in the efficient operation of the machine than its cutterhead. The design of the cutterhead impacts the efficiency of cutting, the balance of the head, the life of the cutters, the maintenance of the main bearing/gearbox, and the effectiveness of the mucking along with its effects on the wear of the face and gage cutters/muck buckets. Overall, cutterhead design heavily impacts the rate of penetration (ROP), rate of machine utilization (U), and daily advance rate (AR). Although there has been some discussion in commonly available publications regarding disk cutters, cutting forces, and some design features of the head, there is limited literature on this subject because the design of cutterheads is mainly handled by machine manufacturers. Most of the design process involves proprietary algorithms by the manufacturers, and despite recent attention on the subject, the design of rock TBMs has been somewhat of a mystery to most end-users. This paper is an attempt to demystify the basic concepts in design. Although it may not be sufficient for a full-fledged design by the readers, this paper allows engineers and contractors to understand the thought process in the design steps, what to look for in a proper design, and the implications of the head design on machine operation and life cycle.

Keywords TBM cutterhead design      Cutterhead layout      Disk cutters      Cutting pattern      TBM efficiency     
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Corresponding Authors: Jamal Rostami   
Just Accepted Date: 13 December 2017   Issue Date: 02 March 2018
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Cite this article:   
Jamal Rostami,Soo-Ho Chang. A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines[J]. Engineering, 2017, 3(6): 892 -904 .
URL:  
http://engineering.org.cn/EN/10.1016/j.eng.2017.12.009     OR     http://engineering.org.cn/EN/Y2017/V3/I6/892
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