A Novel Preparation Device for Remolded Hollow Cylinder Specimen of Frozen Soil

The frozen soil hollow cylinder apparatus is the main experiment instrument to study the mechanical behaviour of frozen soil under complex stress paths including stress rotation. However, it is difficult to prepare hollow cylinder specimen due to the thin wall. In this paper a novel preparation device for remolded hollow cylinder specimen of frozen soil is designed. The universal test machine is used to provide an axial compressive stress, for it can ensure accurate control in axial force and deformation along preparing process. Hence, it can improve the efficiency in specimen preparation. Two pedestals with 8 blades can directly shape grooves on the upper and bottom surfaces of specimen, which can reduce the disturbance while cutting the specimen. The applicability and reliability of specimen prepared by the novel preparation device in frozen soil hollow cylinder tests is verified.