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In 2008, I designed a "Salt Storage Shed" for the City of Ellsworth, ME. I have to agree with dgillette when he/she points out that, if you have been supplied with the values for Phi and the Angle of Repose, and you use something different, then you are assuming the liability for that...

I have given your question some thought in the last few days. 12.5 MPa is much greater than the bearing capacity of any granular soils (12.5 MPa= 260,000psf - approx., according to my Mathcad calc) I know of. This value is orders of magnitude greater than the highest values of soil bearing...

Also, in addition to my last posting, I would like to ad that the internal friction angle, Phi, for compacted granular material is derived from a laboratory confined shear test of the material in question, and could possibly be equal to the Angle of Repose, but the two values are not one in the...

Bearing in mind that the UCS value you have stated came from a controlled laboratory test, I wouldn't assume that it is "absolutely" representative of similar rock encountered over the entire site unless your boring logs show that level of uniformity, but that statement only applies if you are...

I spent 6 years designing "Cut-'n'-Cover" tunnels and deep foundation support elements for the "Big Dig" Project in Boston, Ma. The design of "Rock Socket Drilled Shafts" required very specific knowledge of the type of rock, it's in-situ condition with respect to cracks and fissures, and in my...

The angle of repose, as I was taught and understand it, refers to the maximum stable slope of a non-compacted granular fill that, if exceeded, will cause the material to destabilize, and the slope will seek it's natural angle of repose where it is stable. This can be illustrated by watching a...

I agree with dgillette's suggestion that we do away with Equivalent Fluid Pressure. I have several recent editions of certain geotechnical engineering text books, and not a single one of them even mentions "Equivalent Fluid Pressure". The soil mechanics equations and procedures seem to have been...

In all of the responses addressing EFP, I have seen that al of the descriptions always seem to refer to finding the Equivalent Fluid Pressure based on a value given in a geotechnical report. My question is where does that value in the report come from and how is it generated? If the report says...