Abstract
The disc cutter of tunnel boring machines (TBMs) intended for sandy cobble strata undergoes severe wear, which significantly increases the cost and construction period. Currently, there is no wear prediction model for disc cutters in the case of sandy cobble strata. This paper proposes a wear prediction model for disc cutters of a TBM operated in sandy cobble strata. A wear rate expression is determined based on the theory of tribology. A quantitative relationship between the wear coefficient and the particle size parameters (Cu and d60) is established. The strength of the cobbles and the motion track and outline of the disc cutter are considered in the model. The model is validated using field data from two cases. The effect of grain distribution is considered in the proposed model, unlike that in existing prediction models, thus offering a more effective approach in predicting the wear of disc cutters intended for sandy cobble strata.
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This study was supported by the National Natural Science Foundation of China (NSFC) through Grant No. 51808405.
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Li, Y., Di, H., Yao, Q. et al. Prediction Model for Disc Cutter Wear of Tunnel Boring Machines in Sandy Cobble Strata. KSCE J Civ Eng 24, 1010–1019 (2020). https://doi.org/10.1007/s12205-020-1631-8
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DOI: https://doi.org/10.1007/s12205-020-1631-8