A study of soil disturbance of Pusan clays with reference to drilling, sampling and extruding

Many studies have been carried out to analyse and assess disturbance of clay samples (Baligh, 1985; Jamiokowski et al., 1985; Clayton et al., 1998; Tanaka & Tanaka, 1999; Hight, 2000). Most studies, however, seem to have paid attention mainly to the destructuring and restructuring of the microstructure of clays induced by sampling effects and difference in samplers. There is a lack of studies on sample disturbance due to the drilling technique, vertical stress release when drilling the borehole and extruding of the specimens from the sampling tube in the laboratory.

An investigation...