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<p>Geological data for tunnel construction is usually acquired through surface drilling. However, due to constraints such as limited borehole spacing, the obtained information may deviate from actual subsurface conditions. This can lead to inaccurate decision-making during tunnel boring machine (TBM) operation, ultimately affecting construction progress. To evaluate the ground along tunnels accurately, this paper presents a precise diagnostic method for the tunnel face based on the rotation speed of the disc cutter. First, we propose diagnosing the tunnel face on the basis of the rotation speed of the disc cutter. Second, the cutter rotational speed ratio (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\varvec{R}_{\varvec{n}}\)</EquationSource> </InlineEquation>) is proposed as a parameter for assessing rock hardness. This parameter, in conjunction with the installation positions and rotation angles of all the disc cutters on the cutterhead, can describe the mixed ground conditions of the tunnel face. A case study in the Zhuhai slurry TBM tunnel indicates that the proposed method can distinguish different ground types in tunnel faces. To validate the results, the cutterhead extrusion force was introduced. The findings show that the proposed method can obtain a precise diagnosis of mixed-face ground, which can be useful for tunneling parameter operation.</p>

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Precise diagnosis of mixed-face ground through distributed cutter working status monitoring data in slurry TBM

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Wei Xiaolong,
  • Wang Shuangjing,
  • Zhao Yunbo,
  • He Fei,
  • Dong Yue,
  • Wang Jing

摘要

Geological data for tunnel construction is usually acquired through surface drilling. However, due to constraints such as limited borehole spacing, the obtained information may deviate from actual subsurface conditions. This can lead to inaccurate decision-making during tunnel boring machine (TBM) operation, ultimately affecting construction progress. To evaluate the ground along tunnels accurately, this paper presents a precise diagnostic method for the tunnel face based on the rotation speed of the disc cutter. First, we propose diagnosing the tunnel face on the basis of the rotation speed of the disc cutter. Second, the cutter rotational speed ratio ( \(\varvec{R}_{\varvec{n}}\) ) is proposed as a parameter for assessing rock hardness. This parameter, in conjunction with the installation positions and rotation angles of all the disc cutters on the cutterhead, can describe the mixed ground conditions of the tunnel face. A case study in the Zhuhai slurry TBM tunnel indicates that the proposed method can distinguish different ground types in tunnel faces. To validate the results, the cutterhead extrusion force was introduced. The findings show that the proposed method can obtain a precise diagnosis of mixed-face ground, which can be useful for tunneling parameter operation.