Civil engineering and structures
Rankine active earth pressure with surcharge
Calculates an indicative active soil and surcharge resultant per meter of wall; it is not retaining-wall design.
Related calculators
Simple lateral earth pressure
Simplified lateral pressure calculator from coefficient, unit weight, and depth; it is not code-based retaining-wall design.
Rankine passive earth pressure
Calculates an indicative passive pressure resultant per meter of wall from friction angle and soil unit weight.
Hydrostatic pressure behind wall
Calculates water-pressure resultant, resultant location, and base pressure for a given water height.
Bearing capacity with manual factors
Calculates q_ult = c*Nc + q*Nq + 0.5*gamma*B*Ngamma from manually supplied factors and multipliers.
Boussinesq point-load stress
Calculates vertical stress σ_z below a point load P at radial distance r and depth z.
U to T_v consolidation approximation
Calculates approximate T_v from U: for U <= 0.60 it uses (pi/4)*U^2, for larger U it uses -0.933*log10(1-U)-0.085.