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<p>This study examines the mechanical behavior of deep excavation pits in moist environments, using the Fenghuangzui site as a case study. We analyzed the effects of seasonal water level fluctuations on pit stability, combining archaeological, investigative, and field measurement data. Our results show that excavation-induced stress redistribution causes lateral movement of the side slopes, increasing with depth. Water level changes significantly impact pit stability. When the water level is above the bottom of the pit, local instability occurs due to the saturated soil layer slipping. Conversely, when the water level is below the bottom, bearing capacity failure leads to overall instability. To mitigate these issues, we recommend controlling water levels, improving soil stiffness and shear strength, and implementing anti-seepage measures. Enhancing foundation soil bearing capacity and stiffness is crucial for maintaining pit stability. These findings provide valuable insights for preserving archaeological sites in moist environments.</p>

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Investigation on the mechanism of deep trenching damage in humid archaeological excavation zones

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月13日

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  • Zhang Weixi,
  • Wang Yulan,
  • Wang Ji,
  • Li Changying,
  • Lei Fan,
  • Yuan Feiyong,
  • Tian Hui

摘要

This study examines the mechanical behavior of deep excavation pits in moist environments, using the Fenghuangzui site as a case study. We analyzed the effects of seasonal water level fluctuations on pit stability, combining archaeological, investigative, and field measurement data. Our results show that excavation-induced stress redistribution causes lateral movement of the side slopes, increasing with depth. Water level changes significantly impact pit stability. When the water level is above the bottom of the pit, local instability occurs due to the saturated soil layer slipping. Conversely, when the water level is below the bottom, bearing capacity failure leads to overall instability. To mitigate these issues, we recommend controlling water levels, improving soil stiffness and shear strength, and implementing anti-seepage measures. Enhancing foundation soil bearing capacity and stiffness is crucial for maintaining pit stability. These findings provide valuable insights for preserving archaeological sites in moist environments.