Recent content by pdzeng

Thanks for your responses. I will have to get a copy of Terzaghi and Peck. I have previously adopted critical strength for design purposes fattdad.

I don't think that we are in a situation where building codes superseded engineering principles just yet. As with anything it is important to justify your decisions, and if this is done then in my experience good sense tends to prevail. However, I have not yet worked on a site where ground...

That sounds about right to me BigH. In the past I have used 15deg for London Clay (interpreted from plasticity index).

After doing some more reading around this subject, I understand that drained friction angle can be inferred from subtracting the measured pore pressure from the normal and confining stress components to establish the effective stresses and shear strength can be subsequently computed.

Thanks for you help Mike. I understand now. How can I interpret the drained friction angle using pore pressure measurements from an undrained test?

Thanks Jayrod12. I too have been directed towards that sort of value with advice to keep it conservative.

In the UK the maximum frost depth is generally considered to be 0.45m below the surface. This was based on data gathered from some very cold winters towards the mid-to-late 19th century and the frost line hardly ever reaches that depth in practise. Typically UK building codes specify that...

I am working on a project where I need to determine the phi angle of an overconsolidated clay for retaining wall design. I have been informed by colleagues that the best way is to infer this data is from correlations with PI and that triaxial testing on clays typically yields phi angles of...