ABSTRACT
This paper summarizes recent practical experience with CPT investigations at several permafrost sites in Russia. Some of the investigations were performed in unconventional conditions such as with ice cover, in a crawl space, or from a jack-up platform. All CPT measurements used a cone equipped with a temperature sensor to confirm the subzero temperature of frozen soil. Stress relaxation tests were performed in ice-rich permafrost soils to investigate long-term soil strength in both compression and shear. Sampling of frozen soil using direct push techniques was achieved at two sites.
