Retaining Wall Rankine Lateral Active Earth Pressure & Overturning Moment Calculator
Calculate Rankine active earth pressure coefficient (Ka), resultant lateral thrust force (Pa in kN/m), and base overturning moment (Mo in kNm/m) with surcharge loading.
Total Resultant Lateral Active Thrust (kN per linear meter)
Calculator Inputs
Total Resultant Lateral Active Thrust (kN per linear meter)
Total Base Overturning Moment (kNm per linear meter)
Rankine Active Earth Pressure Coefficient (Ka)
Soil Triangular Thrust Only (kN/m)
Surcharge Lateral Thrust Component
Soil Weight vs. Surcharge Thrust Breakdown
Rankine's classical theory assumes a vertical, frictionless wall backface with dry, free-draining granular backfill (c=0).
All engineering calculations, structural estimates, and electrical sizing metrics are provided for preliminary estimation only. Always ensure compliance with relevant statutory building codes and occupational safety standards, verified by a certified professional engineer before practical implementation.
Calculation Methodology
Ka = (1 - sin(φ)) / (1 + sin(φ)). Active Soil Thrust Pa = 0.5 * Ka * γ * H². Surcharge Thrust = Ka * q * H. Overturning Moment Mo = (Soil Thrust * H/3) + (Surcharge Thrust * H/2).
Frequently Asked Questions
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