


Coulomb's or Rankine Active Earth Pressure Coefficient,
Pressure, Horizontal Resultant and Moment: 
The Rankine formula for earth pressure differs from Coulomb's by ignoring the friction between the wall and the backfill, AngF = 0.0 degrees. 



Calculation: 

Designer/Checker: 



Input: 




(Note: All input Metric units are converted to English units
for the equations below and then the output English units are converted back to
Metric) 

*Angle of backfill slope, (AngB  degrees) 

Angle of back of wall to horizontal, (AngWall  degrees) 

Angle of friction between the wall and the backfill, (AngF  degrees)** 

Height from bottom of heel to top of slope (H  ft or m) 

Density of soil (d  pcf or kg/m^3) 

*Angle of internal friction (AIF  degrees) 

Cohesion of the soil (c  psf or kPa) 



*In order for this equation to apply, AngB <= AIF.

**For Rankine formula use AngF = 0.0.










Output: 

Login to enable the Formulas!

Active earth pressure coefficient, ka = 

Active earth pressure, pa = 

Active earth pressure Resultant, Ra = 

Active earth pressure Moment, Ma = 






