Accession Number : AD0484955

Title :   MEASUREMENT OF FROST HEAVING FORCES ON PILES.

Descriptive Note : Technical rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Crory, F. E. ; Reed, R. E.

Report Date : OCT 1965

Pagination or Media Count : 31

Abstract : This report summarizes the results of frost heave force measurements on creosoted timber and steel pipe piles during the period 1956-1959 and during the 1962-1963 freezing season. The results indicate that, for the types and sizes of piles used, the heaving forces generated on piling during the seasonal freezing of frost susceptible soils may attain, or even surpass, 50,000 lb. It is also concluded that for conditions represented by these tests the maximum rate of heave occurs early in the winter months at relatively shallow depths (2-3 ft), and that the maximum pile heave force occurs during periods of active frost penetration with very cold near-surface ground temperatures. Near maximum heave forces were also produced after complete freezeback of the seasonal thaw zone during periods of extreme cold.

Descriptors :   *PERMAFROST, *BEAMS(STRUCTURAL), *SUPPORTS, STRESSES, LOADS(FORCES), FOUNDATIONS(STRUCTURES), MEASUREMENT, TEST METHODS, ICE, SOILS, FREEZING, STRAIN GAGES, WOOD, INSTRUMENTATION.

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE