Drobi,
Sorry, being a bit slow - my initial thinking was that the gravel and cobble content would effect the undrained shear strength during the lab test and therefore effect the correlation. However this of course is not a function of the shear strength and the test result would not be valid...
What do you think to "modifying" the PI through the BS 5930 description or by a PSD test? Just throwing these ideas around at the moment but my thinking is that this would be the ideal way of relating the two as it would involve little further testing.
Thanks BigH and Drobi.
Specifically, do you know of any work in this field which relates to more complex glacial till (boulder clays) deposits as oppose to relatively homogenous cohesive deposits? I would like to possibly develop/prove empirical relationships by incorporating a local geological...
It really all depends on the outcome of your desk study.
Is the area in a subsidence prone area, perhaps it is prone to dissolution or has been prevously been subject to shallow mining? If so you will have to assess the instability risk.
Your shallow trial pits can give excellent information...
I am about to embark on some research into the relationship between PI and shear strength.
As I understand at present, there is a vast amount of work already undertaken in this field, however this is largely based on overconsolidated clays (London, Gault etc). Can anyone tell me if the work...
