geomane
Geotechnical
- Apr 4, 2013
- 199
How can I figure out the At Rest Earth Pressure Coefficient (Kₒ) From the following info:
Earth Pressure
Depth(ft) Unit Weight (pcf) friction Coefficients(Rankine)
From To Soil Type Moist Submerged angle(Φ) Active Passive AtRest
0 7 SP, SP-SM 105 42.6 29 0.347 2.88 ?
7 25 SP, SP-SM 110 47.6 30 0.333 3 ?
25 40 SP, SP-SM 120 57.6 33 0.295 3.39 ?
Is there a way other than the formula: Kₒ = 1-sin(Φ)
Can you figure it out from the soil unit weight? Basically, I need to figure out the at rest coefficients from info on a boring log only.
Also, I need it to figure out the Equivalent Fluid Pressure EFP:
EFP = [Effective stress X (Kₒ)] + 62.4
Earth Pressure
Depth(ft) Unit Weight (pcf) friction Coefficients(Rankine)
From To Soil Type Moist Submerged angle(Φ) Active Passive AtRest
0 7 SP, SP-SM 105 42.6 29 0.347 2.88 ?
7 25 SP, SP-SM 110 47.6 30 0.333 3 ?
25 40 SP, SP-SM 120 57.6 33 0.295 3.39 ?
Is there a way other than the formula: Kₒ = 1-sin(Φ)
Can you figure it out from the soil unit weight? Basically, I need to figure out the at rest coefficients from info on a boring log only.
Also, I need it to figure out the Equivalent Fluid Pressure EFP:
EFP = [Effective stress X (Kₒ)] + 62.4