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Side force formation mechanism and change law of TBM center cutter

  • Mechanical Engineering, Control Science and Information Engineering
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Abstract

The center cutter of a hard rock tunnel boring machine (TBM) is installed on the cutterhead at a small radius and thus bears complex side force. Given this fact, the formation mechanism and change law of the side force suffered by the center cutter were studied. Based on the rock shear failure criterion in combination with the lateral rolling width, a model for predicting the average side force was set up. Besides, a numerical analysis model of the rock fragmentation of the center cutter was established, and the instantaneous load changing features were investigated. Results shows that the inner side of the center cutter can form lateral rolling annulus in rock during the rotary cutting process. The smaller the installation radius is, the greater the cutter side force will be. In a working condition, the side force of the innermost center cutter is 11.66 kN, while it decreases sharply when installation radius increases. Variation tends to be gentle when installation radius is larger than 500 mm, and the side force of the outermost center cutter is reduced to 0.74 kN.

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Authors and Affiliations

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

    Yi-min Xia  (夏毅敏), Yan-chao Tian  (田彦朝) & Qing Tan  (谭青)

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

    Yi-min Xia  (夏毅敏), Yan-chao Tian  (田彦朝), Qing Tan  (谭青) & Yu-meng Hou  (侯禹蒙)

Authors
  1. Yi-min Xia  (夏毅敏)
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  2. Yan-chao Tian  (田彦朝)
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  3. Qing Tan  (谭青)
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  4. Yu-meng Hou  (侯禹蒙)
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Corresponding author

Correspondence to Yi-min Xia  (夏毅敏).

Additional information

Foundation item: Project(2013CB035401) supported by the National Basic Research Program of China; Project(51475478) supported by the National Natural Science Foundation of China; Project(2012AA041803) supported by the High-Tech Research and Development Program of China

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Xia, Ym., Tian, Yc., Tan, Q. et al. Side force formation mechanism and change law of TBM center cutter. J. Cent. South Univ. 23, 1115–1122 (2016). https://doi.org/10.1007/s11771-016-0361-z

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  • DOI: https://doi.org/10.1007/s11771-016-0361-z

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