Lateral Earth Pressure Coefficients
You can calculate lateral earth pressure coefficients in static and earthquake conditions using this page.
Wall Geometry and Soil Data
Please enter the soil parameters and geometry as specified in the legend and press Calculate button.
Static Conditions (Rankine Method)
Ka=Tan(45 - Φ/2)2
Ko=1-Sin(Φ)
Kp=Tan(45 + Φ/2)2
Earthquake Conditions (Mononobe/Okabe Method)
Horizontal and vertical acceleration ratios of the earthquake:
Kh=ah/g, Kv=av/g
Kae : Active earthquake pressure coefficient
Kpe : Passive earthquake pressure coefficient
Earthquake Conditions (Mononobe & Okabe)
To use this charts please choose the curve corresponding your Kv. Then find the desired Kh from horizontal axis and follow the curve to get the K values from the vertical axis.