Scholarlink

<p>This study compares ground displacement results obtained from finite element analysis (FEA) and field measurements during tunneling with injected mat grout as a soil improvement solution. The FEA model effectively captures the soil-structure interaction mechanisms associated with tunneling-induced ground displacements and ground treatment with grout. The Mohr–Coulomb model with linear elastic-perfectly plastic behavior was selected to simulate the injected mat grout. The study confirms the ability of FEA to predict ground displacement during tunnel construction and TBM advancement. The results indicate that ground movements stabilize approximately 30 m after the TBM face has passed when grout injection is employed. Additionally, the study investigates the influence of grout width and depth on settlement reduction, demonstrating that a 3&#xa0;m width and 4&#xa0;m grout depth significantly mitigate deformation. Reducing settlement by up to 50%. The findings highlight the practical application of grout injection as a cost-effective solution for minimizing tunneling-induced settlement, which is critical for protecting existing infrastructure in urban environments. The case study focuses on Hard Point 3 between Nasser and Maspero Stations along Cairo Metro Line 3, where the TBM passes beneath the 6th of October Bridge. Buildings in the area have shallow foundations, modeled as a uniform floor load of 12 kPa. These findings provide valuable insights for geotechnical engineers in optimizing soil improvement techniques for urban tunneling projects. Ultimately enhancing the resilience and longevity of underground infrastructure.</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

Mitigating Pile Settlement During Tunneling with Grout Injection: A Case Study

  • 期刊论文

  • 发表日期：

    2025年5月2日

查看全文
  • M. Shaban,
  • Mona Mansour,
  • Hussein Mahmoud

摘要

This study compares ground displacement results obtained from finite element analysis (FEA) and field measurements during tunneling with injected mat grout as a soil improvement solution. The FEA model effectively captures the soil-structure interaction mechanisms associated with tunneling-induced ground displacements and ground treatment with grout. The Mohr–Coulomb model with linear elastic-perfectly plastic behavior was selected to simulate the injected mat grout. The study confirms the ability of FEA to predict ground displacement during tunnel construction and TBM advancement. The results indicate that ground movements stabilize approximately 30 m after the TBM face has passed when grout injection is employed. Additionally, the study investigates the influence of grout width and depth on settlement reduction, demonstrating that a 3 m width and 4 m grout depth significantly mitigate deformation. Reducing settlement by up to 50%. The findings highlight the practical application of grout injection as a cost-effective solution for minimizing tunneling-induced settlement, which is critical for protecting existing infrastructure in urban environments. The case study focuses on Hard Point 3 between Nasser and Maspero Stations along Cairo Metro Line 3, where the TBM passes beneath the 6th of October Bridge. Buildings in the area have shallow foundations, modeled as a uniform floor load of 12 kPa. These findings provide valuable insights for geotechnical engineers in optimizing soil improvement techniques for urban tunneling projects. Ultimately enhancing the resilience and longevity of underground infrastructure.