Accession Number : AD0630648

Title :   AN APPROACH TO THE CONSOLIDATION OF SNOW.

Descriptive Note : Research rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Feldt,E. D. ; Ballard,G. E. H.

Report Date : DEC 1965

Pagination or Media Count : 20

Abstract : A consolidation theory is developed for an age-hardened snow under uniaxial stress in the porosity range of 35 to 55% by considering one mechanism, viz., viscous flow of interparticle bonds. For a uniaxial stress sigma, the differential equation for porosity n in terms of time t is shown to be 1/(1-n) dn/dt = nu sigma n/eta (1-an) where a and nu are structural parameters and eta is the coefficient of viscosity of ice. Comparison of this equation and the integrated form with existing data predicts consistent and reasonable values for a. The predicted values of eta/nu range from 0.01 to 100 times the published values for eta, which may indicate that nu, and hence the consolidation rate, is greatly affected by the diagenetic history of the snow and the conditions of experimentation. (Author)

Descriptors :   (*SNOW, COMPACTING), POROSITY, DIFFERENTIAL EQUATIONS, VISCOSITY, COMPRESSION

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE