Location: Bothkennar, UK
A national soft clay research site was established at Bothkennar in Scotland in the late 1980's by the Science and Engineering Research Council. Dr D. W. Hight of GCG was appointed to design, co-ordinate, supervise and interpret a state-of-the-art ground investigation at the site that used the best available techniques world-wide. Sampling equipment from the Universities of Laval and Sherbrooke in Eastern Canada were used, together with the conventional UK piston sampler. In situ testing comprised vane, piezocone, self-boring pressuremeter, dilatometer and self-boring permeameter. Laboratory testing was carried out at seven UK universities and at the University of Laval.
The June 1992 issue of Géotechnique was dedicated to a presentation of the findings of the Bothkennar Characterisation Study, for which Dr Hight was awarded the British Geotechnical Society Prize.
Further studies, on sampling have been carried out at Bothkennar, involving the use of a modified piston sampler and the Japanese standard piston sampler. The results were described in Dr Hight’s 1998 Rankine Lecture and included insight into the impact of sampling disturbance
Overall, the following conclusions were drawn:
Hight, D. W., Bond, A. J. & Legge, J. D. (1992). Characterization of the Bothkennar clay: an overview. Géotechnique, Vol 42, No. 2, pp.303-347.
Hight, D. W. (1992). Characterization of the Bothkennar clay: implications for site investigation practice. Géotechnique, Vol 42, No. 2, pp.377-378.
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