Abstract：
In order to study the layout rule of TBM gauge disc cutters, cutter layout principles are put forward as per the actual rock-breaking conditions and the technical requirements of cutterhead design. The optimization goals and constraints are determined, and an optimized multi-targeting mathematical model of a TBM gauge disc cutter is built to analyze its objective function and constraint condition function and solve it by using a genetic algorithm. Finally, the aforementioned model and algorithm are verified based on the TBM gauge disc cutter layout of the NASOUND tunnel in Iran, which is compared with the original layout. The analysis results show that the unbalanced radial force and overturning moment of the optimized cutterhead decrease by 19.4% and 20.6% , respectively; the strength and rigidity of the cuttterhead are improved; and after layout optimization the maximum stress and deformation of the cutterhead decrease by 36.6% and 30.3%, respectively, which proves the correctness and feasibility of the mathematical model for cutter layout optimization.This research method can serve as a theoretical foundation for cutterhead design and modification.
2016, Vol. 53 