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<p>Stress redistribution caused by deep excavation will induce soil movement, and excessive soil movement potentially causing severe damage to adjacent metro lines and other underground infrastructures. This study systematically quantifies the impact of multiple factors on metro line deformations through sensitivity analysis of spatially distributed metro lines. The relative influence levels of individual factors were rigorously ranked according to their effects on specific evaluation indices. Based on the deformation values of metro lines, the spatial positions are divided into a risk stratification framework which include four-tier influence zones: (a) Strong Influence Zone; (b) Significant Influence Zone; (c) Moderate Influence Zone; (d) Slight Influence Zone. The three-phase risk stratification framework proposed in this study enables efficient pre-construction assessment of excavation-induced metro line deformations through influence prediction perceptions. By comparing in-situ monitoring data from three deep excavation cases adjacent to existing metro lines in downtown Shenyang (include a seasonal frozen soil case), we verified the validity and reliability of the risk stratification framework, which has been successfully applied to subsequent deep excavation projects near metro lines. </p>

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Deformation sensitivity and prediction of existing metro lines adjacent to a deep excavation—a three-phase predicting method and its applications

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Wenxin Cao,
  • Wen Zhao,
  • Chao Wang,
  • Pengjiao Jia

摘要

Stress redistribution caused by deep excavation will induce soil movement, and excessive soil movement potentially causing severe damage to adjacent metro lines and other underground infrastructures. This study systematically quantifies the impact of multiple factors on metro line deformations through sensitivity analysis of spatially distributed metro lines. The relative influence levels of individual factors were rigorously ranked according to their effects on specific evaluation indices. Based on the deformation values of metro lines, the spatial positions are divided into a risk stratification framework which include four-tier influence zones: (a) Strong Influence Zone; (b) Significant Influence Zone; (c) Moderate Influence Zone; (d) Slight Influence Zone. The three-phase risk stratification framework proposed in this study enables efficient pre-construction assessment of excavation-induced metro line deformations through influence prediction perceptions. By comparing in-situ monitoring data from three deep excavation cases adjacent to existing metro lines in downtown Shenyang (include a seasonal frozen soil case), we verified the validity and reliability of the risk stratification framework, which has been successfully applied to subsequent deep excavation projects near metro lines.