Calculator catalog
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Found 19 calculators
Soil unit weight
Calculates soil unit weight as sample weight divided by sample volume.
Vertical soil stress
Calculates simple vertical soil stress from unit weight and depth.
Simple lateral earth pressure
Simplified lateral pressure calculator from coefficient, unit weight, and depth; it is not code-based retaining-wall design.
Rankine active earth pressure with surcharge
Calculates an indicative active soil and surcharge resultant per meter of wall; it is not 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.
Infinite slope safety factor
Calculates an indicative infinite-slope safety factor from user-provided strength parameters and pore pressure.
Soil porosity
Helper calculation of porosity as void volume divided by total volume; it is not code-based design.
Soil gradation coefficients Cu and Cc
Calculates Cu = D60/D10 and Cc = D30^2/(D10*D60) from values read from a gradation curve.
Darcy flow through soil
Calculates gradient i = Δh/L, flow Q = k*A*i, and Darcy velocity q = k*i.
Constant-head permeability test
Calculates k = V*L/(A*Δh*t), where V is the measured flow volume.
Falling-head permeability test
Calculates k = (a*L/(A*t))*ln(h1/h2) for positive heads h1 > h2.
Consolidation time factor
Calculates T_v = c_v*t/H_dr^2 and inverse modes for time, c_v, and drainage path.
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.
Boussinesq point-load stress
Calculates vertical stress σ_z below a point load P at radial distance r and depth z.
Bearing capacity with manual factors
Calculates q_ult = c*Nc + q*Nq + 0.5*gamma*B*Ngamma from manually supplied factors and multipliers.
Simple elastic settlement
Calculates S = q*B*(1-nu^2)*I_s/E_s with manually supplied influence factor I_s.
Preliminary retaining wall check
Preliminary cantilever retaining-wall analysis per 1 m length: Rankine or user Ka pressure, water, uplift, passive resistance, sliding, overturning, contact and base bearing pressures.
Geotechnical design suite
Transparent shallow-foundation bearing check with analytical capacity factors and user-supplied modifiers.