Holding Strength of Piles in Ice.

• Main Author: Stehle,N. S.
• Other Authors: NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
• Format: Text
• Language: English
• Published: 1970
• Subjects: Snow; Ice and Permafrost; Structural Engineering and Building Technology; Mechanics; (*BEAMS(STRUCTURAL); PERFORMANCE(ENGINEERING)); (*SEA ICE; PIERS); ANTARCTIC REGIONS; FREEZING; PERMAFROST; LOADS(FORCES); CREEP; SOILS; FILLING; TEST METHODS; *PILE STRUCTURES; Antarctic; Antarc*; Ice; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/AD0714165; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0714165

Piles are used in polar regions for many of the same purposes as in temperate regions, including foundations for structures in areas of permafrost and ice. The bearing capacity of piles set in permafrost and ice depends on the holding, or tangential adfreezing, strength. Tests were conducted at the Naval Civil Engineering Laboratory to determine the influence of pile material, shape, ground temperature, and backfill on tangential adfreezing strength in ice. General criteria for application were developed based on laboratory and field information. It was concluded that ground and air temperatures are the most influential parameters in determining the pile type and backfill. Design load, however, should be based on tangential adfreezing strength after long-term loading; this strength was determined to be one-half to two-thirds the tangential adfreezing strength after no previous loading. (Author)