Cutter performance evaluation is important for shield TBM during the design and refurbishment stage. To face the challenges of choosing the proper cutters for tunneling in complex condition, according to the concept of parameter profile analysis, a systematic evaluation method was proposed. In this novel method, by comparing with their expected best value and the corresponding unacceptable limit, all of the selected performance parameters can be synthesized to assess the proximity of the overall merit of each cutter with respect to all the performances considered under all possible geological conditions. Performance indexes including cutting efficiency, structural strength, wear life, and dynamic response were individually analyzed based on linear cutting tests, finite element analyses, and theoretical calculations. Finally, a case study was carried out to demonstrate how the method is applied to find the optimal cutter among a small-scale disc cutter and two scrapers used for cutting multiple soft rock. In this case, three types of concrete specimens with distinct mechanical properties were carefully prepared to substitute for soft rock. The evaluation results show that the method has an intrinsic applicability in helping to make a reasonable trade-off between cost and cutting performance during the cutter selection process.

中文翻译：

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盾构式掘进机掘进多软岩系统性能评价

在设计和翻新阶段，刀具性能评估对于盾构 TBM 很重要。针对复杂工况下掘进刀具选择合适的挑战，根据参数剖面分析的概念，提出了一种系统的评价方法。在这种新颖的方法中，通过与它们的预期最佳值和相应的不可接受极限进行比较，可以综合所有选定的性能参数，以评估每个刀具的整体优点与在所有可能的地质条件下考虑的所有性能的接近程度. 基于线性切削试验、有限元分析和理论计算，对切削效率、结构强度、磨损寿命和动态响应等性能指标进行了单独分析。最后，进行了一个案例研究，以展示如何应用该方法在用于切割多个软岩的小型圆盘刀具和两个刮刀中找到最佳刀具。在这种情况下，精心准备了三种具有不同力学性能的混凝土试件来代替软岩。评估结果表明，该方法具有内在的适用性，有助于在刀具选择过程中在成本和切削性能之间做出合理的权衡。