A cutaway excavation deepens between retaining walls. Soil and groundwater pressure arrows increase with depth; upper and lower struts install at selected stage fractions. Compare tributary strut demand, capacity and a labeled wall-deflection proxy.
• 3D scene parts: Retained soil and surface surcharge; retaining wall panels and piles; staged struts and walers; effective-soil and water pressure arrows; water table and demand recorder. • Controls: Final excavation depth (3–8 m); Effective soil friction angle (24–38 °); Surface surcharge (0–80 kPa); Water table depth below ground (0–8 m); Strut spacing along wall (2–5 m); Selected axial strut capacity (200–1000 kN); Install staged bracing (0–1 0=omit, 1=install). • Live readouts: Current excavation depth (m); Lateral resultant per wall length (kN/m); Load moment about excavation base (kN·m/m); Installed brace levels; Maximum tributary strut demand (kN); Demand / selected capacity; Illustrative wall-deflection proxy (mm). • Guided experiments: High water / surcharge; Omit supports; Narrow strut spacing. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
Ka=tan²(45°−φ′/2) σ′v(z)=18 min(z,zw)+(18−9.81)max(z−zw,0) p(z)=Ka[σ′v(z)+q]+9.81max(z−zw,0) R=∫p dz; M=∫p(H−z) dz Strut demand = selected tributary resultant × longitudinal spacing
Representative Rankine active pressure, equal bulk/saturated unit weight 18 kN/m³, no cohesion, one retained side per calculation. Real braced excavations may require apparent-pressure envelopes and soil–structure interaction. Strut demands use simple half-height tributaries; one installed level carries the current full resultant. Deflection is an elastic cantilever integration with fixed EI=20000 kN·m² per m wall, multiplied by a stated illustrative 0.1 factor when braced. No embedment equilibrium, passive resistance, basal heave, strut buckling or construction-design check. Try the preset experiments, then compare the live readouts with the equations.
No. Water pressure is added separately.
No. It uses a stated illustrative reduction of the cantilever proxy.
Representative Rankine active pressure, equal bulk/saturated unit weight 18 kN/m³, no cohesion, one retained side per calculation. Real braced excavations may require apparent-pressure envelopes and soil–structure interaction. Strut demands use simple half-height tributaries; one installed level carries the current full resultant. Deflection is an elastic cantilever integration with fixed EI=20000 kN·m² per m wall, multiplied by a stated illustrative 0.1 factor when braced. No embedment equilibrium, passive resistance, basal heave, strut buckling or construction-design check.