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tunnel-engineering

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Conceptual structural, ventilation & drainage design of an underground road tunnel — AutoCAD geometry, Python engineering calculations (Terzaghi loosening pressure, elastic ring theory, IRC/PIARC ventilation, Manning's drainage), and a live-formula Excel cross-check.

  • Updated Aug 24, 2026
  • Python

Free online Schleiss pressure tunnel & shaft design calculator: reinforced concrete lining under internal pressure (Ch. 7) and external water pressure during dewatering (Ch. 8). ماشین‌حساب آنلاین طراحی تونل تحت فشار نفوذپذیر (اشلایس، فصل ۷ و ۸)

  • Updated Oct 26, 2026
  • HTML

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