• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: permafrost
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.694.706; http://nsidc.org/fgdc/glossary/definitions.pdf

2. active air-cooled thermal pile A foundation pile on which a cold air refrigeration system has been installed to remove heat from the ground. COMMENT: The refrigeration system may be fastened to, or form part of the pile or, if the pile is a sealed unit (e.g. steel pipe), the pile itself may serve as both a heat-removal device and a structural unit. REFERENCES: Heuer, 1979; Johnston, 1981. 3. active construction methods in permafrost Special design and construction methods used for engineering works in permafrost areas where permafrost degradation cannot be prevented. COMMENT: Two main approaches are possible. Unfavourable foundation materials can be thawed and compacted or replaced with more suitable materials before the structure is erected. Alternatively, the foundations and structure may be designed to accommodate any thaw settlement that will occur.