...C. R. I. Clayton, MSc, DIC, PhD, CEng, FICE, CGeol, FGS; A. Siddique, BSc,MSc, PhD The past decade has seen a considerable improvement in the understanding of the causes of tube sampling disturbance, as a result both of comparative studies of the performance of different sampling methods...

... piston sampling and soil fabric studies. The layout of exploratory holes is described in the context of designing earthworks to limit differential settlements under runways and taxiways. The developmentof a computerized project geotechnical information management system is described. Introduction...