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<p>The long-term stabilization of reactivated landslides using anti-slide piles presents a significant engineering challenge, particularly when considering the coupled effects of pre-existing structural damage and extreme environmental conditions. This study investigates the performance of anti-slide piles in a representative reactivated landslide in Mao County, Sichuan Province, China, through integrated field investigations, pile integrity assessments, and numerical analysis informed by displacement monitoring. The findings reveal that while emergency reinforcement measures such as pressure-dispersed anchor cables provide initial control, their long-term effectiveness is significantly limited by the synergistic interaction of pre-existing pile defects (including pile Inclination and internal cracking) and extreme rainfall events. Specifically, we observed that tilt-induced load eccentricity leads to substantial increases in bending moments, and storm-induced pore water pressure elevation exacerbates slope displacements. These results underscore the critical role of multi-physical coupling in the progressive degradation of anti-slide pile systems in reactivated landslides. To address these limitations, we propose a “treatment-monitoring-rehabilitation” life-cycle management framework incorporating spatially-adaptive zonal remediation strategies tailored to the observed heterogeneity of pile damage. This approach emphasizes the necessity of integrating environmental-structure interaction parameters into performance assessments and provides valuable insights for developing more resilient and sustainable stabilization measures for reactivated landslides in similar complex geo-environmental settings.</p>

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Anti-slide pile performance in a reactivated landslide: monitoring and numerical insights from Mao County, Sichuan, China

  • 期刊论文

  • 发表日期：

    2026年3月26日

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  • Qiuxiang Huang,
  • Chu Zhang,
  • Shupeng Li,
  • Jialin Wang

摘要

The long-term stabilization of reactivated landslides using anti-slide piles presents a significant engineering challenge, particularly when considering the coupled effects of pre-existing structural damage and extreme environmental conditions. This study investigates the performance of anti-slide piles in a representative reactivated landslide in Mao County, Sichuan Province, China, through integrated field investigations, pile integrity assessments, and numerical analysis informed by displacement monitoring. The findings reveal that while emergency reinforcement measures such as pressure-dispersed anchor cables provide initial control, their long-term effectiveness is significantly limited by the synergistic interaction of pre-existing pile defects (including pile Inclination and internal cracking) and extreme rainfall events. Specifically, we observed that tilt-induced load eccentricity leads to substantial increases in bending moments, and storm-induced pore water pressure elevation exacerbates slope displacements. These results underscore the critical role of multi-physical coupling in the progressive degradation of anti-slide pile systems in reactivated landslides. To address these limitations, we propose a “treatment-monitoring-rehabilitation” life-cycle management framework incorporating spatially-adaptive zonal remediation strategies tailored to the observed heterogeneity of pile damage. This approach emphasizes the necessity of integrating environmental-structure interaction parameters into performance assessments and provides valuable insights for developing more resilient and sustainable stabilization measures for reactivated landslides in similar complex geo-environmental settings.