APPLICATION OF LAVAL TYPE LARGE DIAMETER SAMPLER TO SOFT CLAY IN JAPAN

概要

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An undisturbed and high quality soil sample is necessary to investigate the mechanical behavior of a natural soft clay. Large intact soil samples must be prepared in order to carry out a torsional shear test or a truly triaxial compression test in geotechnical engineering practice. In this study, the applicability of a new Laval type sampler with 208 mm diameter designed based on the design principle proposed by the geotechnical group of Laval University, Canada is discussed. Laboratory tests on samples of typical Japanese sensitive soft clays obtained with a new Laval type sampler compared with samples taken with the Japanese piston sampler, the Shelby tube, NGI 54 mm sampler and ELE 100 mm (ELE-100) sampler were carried out to demonstrate the superiority of the Laval type sampler over the piston sampler. The quality of large samples obtained with a Laval type sampler was confirmed to be better than for samples obtained with other samplers.
社団法人地盤工学会の論文
1996-09-15