⛏️ Trench Excavation Lab: Wall Stability, Shoring, Earth Pressure and Drainage

Cut a trench in a layered loam, clay and sand monolith and see Rankine earth pressure, planar-wedge wall stability, groundwater drawdown and seepage, spoil-heap surcharge and timber shoring loads (boards, walers, buckling struts) computed live, next to a half-section of an earth-covered log-roof shelter checked for bending and sag. An experiment sweeps cohesion and compares the deepest standing cut with the closed form Hc = 4c/(gamma tan(45 - phi/2)).

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install