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<p>Water-rich sandy stratum, characterized by high permeability, low cohesion, and strong fluidity, poses critical challenges for large-section quasi-rectangular Earth Pressure Balance Shield Machine tunneling. Based on a quasi-rectangular shield tunneling project in the water-rich sandy stratum of Zhengzhou Metro Line 8, this study focuses on optimizing tunneling parameters. Through field measurements and statistical analysis, the evolution patterns of key parameters—including chamber pressure, cutterhead torque, total thrust, screw conveyor torque, grouting pressure, grouting volume, and advance rate—are investigated. Recommended value ranges for these parameters are proposed. The research outcomes provide data support and practical guidance for quasi-rectangular shield tunneling under similar geological conditions.</p>

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Analysis of parameters for large cross-section quasi-rectangular EPBM in water-rich sandy strata

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月19日

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  • Shi-ju Ma,
  • Kai-rong Hong,
  • Yong-gang Ding,
  • Yang-kai Zhang,
  • Miao-jun Yan

摘要

Water-rich sandy stratum, characterized by high permeability, low cohesion, and strong fluidity, poses critical challenges for large-section quasi-rectangular Earth Pressure Balance Shield Machine tunneling. Based on a quasi-rectangular shield tunneling project in the water-rich sandy stratum of Zhengzhou Metro Line 8, this study focuses on optimizing tunneling parameters. Through field measurements and statistical analysis, the evolution patterns of key parameters—including chamber pressure, cutterhead torque, total thrust, screw conveyor torque, grouting pressure, grouting volume, and advance rate—are investigated. Recommended value ranges for these parameters are proposed. The research outcomes provide data support and practical guidance for quasi-rectangular shield tunneling under similar geological conditions.