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Kokan Railway Tunnels: Geological Considerations and Challenges

📑 5 slides 👁 11 views 📅 4/11/2026
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Introduction to Kokan Railway Tunnels

Kokan Railway features 90+ tunnels spanning 500 km through Western Ghats

Introduction to Kokan Railway Tunnels
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Key Geological Challenges

  • Unstable basalt rock formations with frequent fractures and joint patterns
  • High water seepage areas requiring advanced drainage systems (avg 500L/min flow)
  • Fault zones spanning 12 critical sections requiring special reinforcement
Key Geological Challenges
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Engineering Solutions Implemented

  • New Austrian Tunneling Method (NATM) used for 85% of tunnel construction
  • Shotcrete lining thickness varies from 150-300mm based on rock class
  • Innovative ventilation systems maintain air quality in 5km+ long tunnels
Engineering Solutions Implemented
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Environmental Considerations

  • Special blast techniques reduced vibration impact on 15 protected wildlife species
  • 86 water diversion channels built to maintain natural hydrological patterns
  • 2.5 million native saplings planted for slope stabilization and eco-restoration
Environmental Considerations
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Conclusion & Future Outlook

  • Project serves as benchmark for tunnel engineering in complex geology
  • Annual maintenance costs average ₹120 crore due to challenging conditions
  • New sensor-based monitoring systems being installed for safety enhancements
Conclusion & Future Outlook
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