Friction "f" and coefficient "Ks" relation for Rankine formula
Friction "f" and coefficient "Ks" relation for Rankine formula
(OP)
I have ran into this problem of solving for a safety factor for a retaining wall using the Rankine formula, but instead of having the angle of friction "φ" I had only a coefficient of cohesion Ks. I am unaware of the relationship between the two. I might manage to extrude it but I would rather get the opinion of a specialist instead of playing Magellan!





RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
But in case I have granular that is moist? It may be a bit too tricky for a structural, I should probably just let the geotech do it all the way.
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
http://www.eng-tips.com/viewthread.cfm?qid=325411
Do you have Ks 'a coefficent of cohesion' or do you have Ks the coefficient for lateral soil pressure?
If Ks is the latter.
If you have Ks then the pressure for the soil at a depth H is Ps= Ks*gamma*H
The force is Fs=1/2*Ps*H.
EIT
www.HowToEngineer.com
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
EIT
www.HowToEngineer.com
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
Thank y'all for your tips.
RE: Friction "f" and coefficient "Ks" relation for Rankine formula
If you have a water level part way up the wall, the pressure increment below that level is the hydrostatic pressure plus the buoyant soil pressure. The buoyant soil pressure is just the triangular pressure obtained in the same way as you outlined above, but with the density of the soil reduced by the density of water. Any good soils book will have an explanation.
RE: Friction "f" and coefficient "Ks" relation for Rankine formula