Scholarlink

<p>Joints are critical characteristics of rock masses that significantly influence the tunnelling mechanisms and performance of shield TBMs. This paper presents four series of TBM penetration tests conducted in migmatitic granite to investigate the effects of different joint conditions on shield TBMs’ tunnelling performance. Data on cutter forces, muck characteristics, rock fragmentation efficiency, and vibration characteristics were systematically analyzed. The results indicate that as joint density increases, the relationship between penetration rate and cutter thrust shifts from a power-law to a linear growth trend. Concurrently, the rock fragmentation mode transitions from a crack-controlled mode (dominated by cutterhead thrust) to a joint-controlled mode (dominated by cutterhead torque). The integrity of the muck improves with an increase in large rock chips, while the shape of rock chips transitions from elongated and flattened with distinct cracks to thick and blocky with visible joint planes. The rock fragmentation efficiency and cutterhead vibration intensity increase with both joint density and penetration rate. The findings provide a basis for optimizing shield TBM operational parameters in response to different joint conditions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Tunnelling Performance by TBM Penetration Tests Under Different Joint Conditions

  • 期刊论文

  • 发表日期：

    2026年1月7日

查看全文
  • Fan Wu,
  • Zhiwei Jiang,
  • Hongyi Xu,
  • Liu Huang,
  • Xingfei Xie,
  • Qiuming Gong

摘要

Joints are critical characteristics of rock masses that significantly influence the tunnelling mechanisms and performance of shield TBMs. This paper presents four series of TBM penetration tests conducted in migmatitic granite to investigate the effects of different joint conditions on shield TBMs’ tunnelling performance. Data on cutter forces, muck characteristics, rock fragmentation efficiency, and vibration characteristics were systematically analyzed. The results indicate that as joint density increases, the relationship between penetration rate and cutter thrust shifts from a power-law to a linear growth trend. Concurrently, the rock fragmentation mode transitions from a crack-controlled mode (dominated by cutterhead thrust) to a joint-controlled mode (dominated by cutterhead torque). The integrity of the muck improves with an increase in large rock chips, while the shape of rock chips transitions from elongated and flattened with distinct cracks to thick and blocky with visible joint planes. The rock fragmentation efficiency and cutterhead vibration intensity increase with both joint density and penetration rate. The findings provide a basis for optimizing shield TBM operational parameters in response to different joint conditions.