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.
python numpy excel autocad matplotlib structural-engineering structural-analysis civil-engineering tunnel-engineering ventilation-design drainage-design
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Updated
Aug 24, 2026 - Python