Abstract：
The TBM method has become the standard of tunnel construction by virtue of its safety, economy and
speed. Studies on the cutter head and cutters are central to the TBM method in terms of both construction process and economic cost. A mechanical and numerical model of a cutter breaking rock was established by the PFC method, which determines the rock-breaking effect of cutters of different sizes in terms of the number of cracks as well as their width, depth and extending lengths. Appropriate cutter penetration and the corresponding optimal cutter spacing for different rock lithologies were obtained based on the multiple leaping characteristics of peak values of the relationship curve of cutter force and penetration as well as the through cracks between two cutters. The results provide a reference for the optimization of driving parameters of TBM tunnels with different lithologies.
ZHANG Zhi-Qiang- Zhang- Yang- Zhang- Biao- Zeng-Bo-Wen
.Optimization of the Force Applied to Cutters and the Spacing of TBM Cutters[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(6): 108-114
2016, Vol. 53 