Coefficient of cohesion of soils and angle of friction relation using the Rankine method
Coefficient of cohesion of soils and angle of friction relation using the Rankine method
(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. Please help!






RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
Doug Jenkins
Interactive Design Services
http://newtonexcelbach.wordpress.com/
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
http://www.avant-garde-engineering.com/K-to-phi.pn...
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method
Ks for the active soil pressure maybe related to the effective friction angle of the soil 'phi' by Rankine or Coulumns formulas. This is typical for earth retention however you may also need the 'at-rest' or passive pressure as well which also relate K to phi which other geometric variables.
Usually you are given the 'phi' of a soil, wall batter and backslope and your able to find your Ks by using coulumb equation or rankine. However if you already have Ks I'm not sure why you are interested in phi. For a clayey-sandy soil I could see a phi of 26-28 as possible. Which would give Ka (active soil pressure) around 0.35 for a flat backslope and vertical wall with no friction between the wall and soil.
EIT
www.HowToEngineer.com
RE: Coefficient of cohesion of soils and angle of friction relation using the Rankine method