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Distribution of contact loads in crushed zone between tunnel boring machine disc cutter and rock

隧道硬岩掘进机盘形滚刀破岩过程中刀岩接触载荷

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Abstract

The construction efficiency and quality of tunnel boring machines (TBMs) is largely determined by the service life of cutting tools, which is the result of contact loads in the crushed zone between cutter ring and rock. In this paper, a series of rock breaking tests were conducted with a 216 mm diameter disc cutter and concrete samples. Based on the superposition principle, the distribution of contact loads between disc cutter and rock were obtained by using the truncated singular value decomposition (TSVD). The results show that both the peak value and the whole numerical distribution of the radial strains on the cutter ring increase with the increase of the penetration. The distribution curves of the contact loads show an approximate parabola going downwards, which indicates contact loads are more concentrated. The front non-loading area with a ratio from 1.8% to 5.4% shows an increasing trend with the increase of penetration. However, the change of rear non-loading area is not obvious. It is believed that the conclusions have guidance for the study of rock breaking mechanism and manufacturing process of the disc cutter.

摘要

隧道硬岩掘进机(TBM)破岩刀具的使用寿命是刀岩接触载荷作用的结果, 这与工程的施工效 率和质量息息相关。本文采用直径为 216 mm 的盘形滚刀进行了一系列混凝土切削试验, 基于叠加原 理, 利用截断奇异值法(TSVD)得到了盘形滚刀与岩石接触区接触载荷的分布规律。研究结果表明:随 着贯入度的增加, 刀圈径向应变峰值和整体数值均增加; 刀岩接触载荷分布曲线近似为开口向下的抛 物线, 接触载荷更加集中; 随着贯入度的增加, 前卸荷区占比从 1.8%增加至 5.4%, 而后卸荷区无明 显变化; 研究结果对盘形滚刀破岩机理和制造工艺的研究有一定的指导意义。

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Authors and Affiliations

  1. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, 410083, China

    Yu-peng Shi  (史余鹏), Yi-min Xia  (夏毅敏), Qing Tan  (谭青) & Shuo Qiao  (乔硕)

  2. College of Mechanical and Electrical Engineering, Central South University, Changsha, 410083, China

    Yu-peng Shi  (史余鹏), Yi-min Xia  (夏毅敏), Qing Tan  (谭青) & Shuo Qiao  (乔硕)

  3. Patent Examination Cooperation Sichuan Center of the Patent Office, SIPO, Chengdu, 610000, China

    Yi-chao Zhang  (张逸超)

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  1. Yu-peng Shi  (史余鹏)
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  2. Yi-min Xia  (夏毅敏)
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  3. Qing Tan  (谭青)
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  4. Yi-chao Zhang  (张逸超)
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Correspondence to Yi-min Xia  (夏毅敏).

Additional information

Foundation item: Project(51475478) supported by the National Natural Science Foundation of China; Project(2013CB035401) supported by the National Basic Research Program of China

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Shi, Yp., Xia, Ym., Tan, Q. et al. Distribution of contact loads in crushed zone between tunnel boring machine disc cutter and rock. J. Cent. South Univ. 26, 2393–2403 (2019). https://doi.org/10.1007/s11771-019-4182-8

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  • DOI: https://doi.org/10.1007/s11771-019-4182-8

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