INFORMAL DISCUSSION: Session 4 Engineering in Stiff Clays

INFORMAL DISCUSSION

Session 4

Engineering in Stiff Clays

CHAIR: MR DUNCAN NICHOLSON & DR JOHN POWELL

Dr John Powell Chairman

We would like to start the discussion with some questions

arising from the paper by Kovacevic, Higgins, Potts and

Vaughan 'Undrained behaviour of brecciated Upper Lias

Clay at Empingham Dam'. Our first question is, in the light

of back-analysis of the behaviour of the Upper Lias Clay at

the site, what site investigation techniques would the authors

recommend in similar situations?

Dr Nesha Kovacevic, Geotechnical Consulting Group

It is important to recognise that the Empingham Dam

case history was a subject of extensive research, mainly