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Tunnels are becoming increasingly important in transportation networks and the demand for underground space is growing. However, tunnelling imposes risks and collapses are a major safety concern. A spectrum of tunnel collapse incidents and identifying the gaps in their occurrences provide valuable insights for understanding and estimating the collapse of the Uttarkashi tunnel. An investigation into the collapse of Uttarkashi tunnel revealed several factors contributing to the problem, prompting collaborative analysis by geological and environmental experts. Subsequently, practical measures were implemented and evaluated using non-contact total station deformation measurements and finite element numerical analysis to ensure personnel safety and environmental protection during tunnelling. The study identified different parameter as the primary causes of the collapse. The research emphasized the importance of accurately describing the tunnel face, promptly analysing and predicting geological conditions ahead of the tunnel face, ensuring precise classification of surrounding rock, and meeting the strength requirements of supporting parameters to minimize collapse risks. Effective strategies included reinforcing support in collapse-prone areas, sealing the surrounding rock of the collapsed body, enhancing support strength in affected regions, and promptly filling collapsed cavities. The applied treatments providing valuable insights for future tunnel design and construction projects facing similar challenges with safe, effective, and reliable parameters for the safety. Tunnel construction projects present unique challenges and risks that demand meticulous attention to safety measures. The first step involves a thorough risk assessment to identify potential hazards and vulnerabilities. Utilizing advanced technologies such as ground-penetrating radar and geophysical surveys, engineers can accurately map subsurface conditions and anticipate geological challenges. During excavation, employing state-of-the-art tunnel boring machines equipped with real-time monitoring systems enhances safety by providing early detection of ground instability and potential collapses. Additionally, implementing robust ventilation and fire suppression systems mitigates risks associated with air quality and fire hazards.

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Preventive Approach to Minimize Tunnel Collapse Risk: Investigation of Uttarkashi Tunnel Collapse

  • 会议论文

  • 发表日期：

    2025年

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  • Bikarama Prasad Yadav,
  • Karan Rodale,
  • Wallabh Borkar,
  • Mayank Sehrawat,
  • Shubhankar Tiwari

摘要

Tunnels are becoming increasingly important in transportation networks and the demand for underground space is growing. However, tunnelling imposes risks and collapses are a major safety concern. A spectrum of tunnel collapse incidents and identifying the gaps in their occurrences provide valuable insights for understanding and estimating the collapse of the Uttarkashi tunnel. An investigation into the collapse of Uttarkashi tunnel revealed several factors contributing to the problem, prompting collaborative analysis by geological and environmental experts. Subsequently, practical measures were implemented and evaluated using non-contact total station deformation measurements and finite element numerical analysis to ensure personnel safety and environmental protection during tunnelling. The study identified different parameter as the primary causes of the collapse. The research emphasized the importance of accurately describing the tunnel face, promptly analysing and predicting geological conditions ahead of the tunnel face, ensuring precise classification of surrounding rock, and meeting the strength requirements of supporting parameters to minimize collapse risks. Effective strategies included reinforcing support in collapse-prone areas, sealing the surrounding rock of the collapsed body, enhancing support strength in affected regions, and promptly filling collapsed cavities. The applied treatments providing valuable insights for future tunnel design and construction projects facing similar challenges with safe, effective, and reliable parameters for the safety. Tunnel construction projects present unique challenges and risks that demand meticulous attention to safety measures. The first step involves a thorough risk assessment to identify potential hazards and vulnerabilities. Utilizing advanced technologies such as ground-penetrating radar and geophysical surveys, engineers can accurately map subsurface conditions and anticipate geological challenges. During excavation, employing state-of-the-art tunnel boring machines equipped with real-time monitoring systems enhances safety by providing early detection of ground instability and potential collapses. Additionally, implementing robust ventilation and fire suppression systems mitigates risks associated with air quality and fire hazards.