TBM滚刀布置方案对比分析与评价

Comparative Analysis and Evaluation of Different Disc Cutter Layout Schemes for TBM

刀盘是全断面岩石掘进机(TBM)的核心部件,滚刀布置设计是刀盘结构设计的关键,直接决定着刀盘的综合掘进性能。基于硬岩TBM的2种滚刀设计方案,对比分析不同滚刀布置方式对TBM刀盘力学性能的影响。从刀盘整体受力平衡的角度,对比计算2种方案的滚刀群径向不平衡力和倾覆力矩;从刀盘局部变形和应力分布的角度,提出滚刀分布密度的评价指标,并与刀盘面变形有限元计算结果进行关联分析。研究结果表明:1)滚刀分布密度可作为滚刀布置的设计评价指标;2)溜渣板对刀盘的力学性能影响较大;3)随机式滚刀布置方案优于米字型滚刀布置方案。

The cutterhead is the key component of full-face hard rock tunnel boring machine(TBM).The layout of the disc cutters is the key process in design of TBM cutterhead,which directly influences the cutterhead performance.Based on two kinds of disc cutter layout schemes for TBM,the influence of different layouts of disc cutter on the mechanical properties of TBM cutterhead is analyzed.From the aspect of the overall force balance of disc cutter,the radial unbalance force and overturning moment of the disc cutter group of the two schemes are compared.From the aspect of local deformation and stress distribution of the cutterhead,a new evaluation index of the cutter distribution density is proposed,and the correlation analysis is carried out with the finite element calculation results of the cutterhead.The study results show that:(1)The disc cutter distribution density is an effective index to evaluate the quality of the cutter layout.(2)The supporting ribs affect the cutterhead mechanical performance significantly.(3)Stochastic layout pattern of disc cutter is better than the double-cross-typed layout pattern.