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首页> 外文期刊>American journal of applied sciences >The Wear of Tunnel Boring Machine Excavation Tools in Rock
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The Wear of Tunnel Boring Machine Excavation Tools in Rock

机译：岩石隧道掘进机开挖工具的磨损

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Some of the most important aspects in the study of the fragmentation of rock due to the action of TBM disks concern the abrasiveness of the rock and the wear of the tools. The wear of the disks in feet means that they have to be substituted, with consequent effects on the efficiency of the excavation, on the speed of advancement and therefore, on the times and costs of constructing the tunnel. After having conducted a detailed examination of the methods that have become established in scientific literature to assess the degree of abrasiveness of rock and the potential speed of tools wear, the formulas that allow an estimation to be made of the mean advancement velocity of the excavation machine are presented, considering the effect of wear on the tools and the necessity of substituting them. By applying the Barton method to four different types of rock, for three types of tunnel diameter, it has been possible to obtain the trend of the global advancement velocity of a TBM with variations of the GSI index. It has been possible to note how the CLI parameter, which describes the potentiality of the rock to wear the disks, can influence the global advancement velocity of the TBM to a great extent Data obtained during the recent construction of a tunnel in North Italy have made it possible to compare the currently available calculation methods and obtain the CLI parameter through back-analysis. A good agreement has been found, above all between the Barton calculation method and that of the Norwegian School, both of which have shown to be reliable systems for the forecasting of the wear of disks on a TBM and for the estimation of the advancement speed of the excavation machine.
机译：由于TBM盘的作用，岩石碎裂研究中的一些最重要方面涉及岩石的磨蚀性和工具的磨损。圆盘的英尺磨损意味着必须更换圆盘，从而对开挖效率，前进速度以及隧道的时间和成本产生影响。在对科学文献中已经建立的评估岩石的磨蚀程度和工具的潜在磨损速度的方法进行了详细的研究之后，这些公式可以对挖掘机的平均前进速度进行估算考虑磨损对工具的影响以及更换工具的必要性，介绍了这些工具。通过将Barton方法应用于四种不同类型的岩石，对于三种类型的隧道直径，已经可以获得随GSI指数变化的TBM整体前进速度的趋势。可能已经注意到，描述岩石磨损盘的潜力的CLI参数如何在很大程度上影响TBM的整体前进速度，这是在意大利北部最近修建的隧道中获得的数据得出的。可以比较当前可用的计算方法，并通过反向分析获得CLI参数。在Barton计算方法与挪威学派的方法之间，尤其是在两者之间已找到了很好的协议，这两种方法都已证明是可靠的系统，可用于预测TBM上的磁盘磨损以及估计TBM的前进速度。开挖机。

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