Residual strength characteristics of Bothkennar clay

Barry Lehane, Richard Jardine

Research output: Contribution to journalArticlepeer-review


The Paper describes a series of ring shear experiments which were performed to assist the interpretation of instrumented pile tests carried out at Bothkennar. Data are presented from soil-soil and soil-interface experiments. The interface used was a sand blasted annulus of stainless steel and tests were made at a variety of displacement rates. The large displacement shearing behaviour was found to be turbulent, despite the soil's high clay fraction and plasticity index, with slow residual ' ~ 30°. There was no sign of the large difference often seen with high' clays between soil-soil and soil-interface tests. Marked reductions in shearing resistance were found (post-peak) in high-speed tests. These were transitory and probably associated with a change in the basic mechanisms of shearing, rather than the creation of highly ordered residual soil fabric.
Original languageEnglish
Pages (from-to)363-367
Issue number2
Publication statusPublished - 1992
Externally publishedYes


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