SHELBY TUBE SAMPLING
Shelby tube sampling is used to collect undisturbed samples of soft, fine-grained (cohesive) soils in order to recover intact specimens that are representative of the in-situ soil density and water content—two critical factors for evaluating engineering properties such as strength, compressibility, permeability, and density. The sample is subsequently extruded from the Shelby tube using a properly sized hydraulic extruder and extrusion platen.