Expert Guide

Babu

Structural Design Helpers

Retaining Wall Earth Pressure Calculator

Quality Inspector

Kaka

Find lateral force on retaining structures.

📐 Formula & Method

Ka = (1-sinΦ)/(1+sinΦ). Pressure = 0.5 × Ka × Density × H².

Pressure = 0.5 × Ka × γ × H²

📋 Worked Example

3m wall, 18kN/m³ soil, 30° friction:
• Ka = (1-0.5)/(1+0.5) = 0.333
• Pressure = 0.5 × 0.333 × 18 × 9 = 27 kN/m

❓ Frequently Asked Questions

Active vs Passive pressure?

Active pressure is exerted by soil against the wall. Passive pressure is the resistance offered by soil when the wall is pushed into it.