Accession Number : AD0765434

Title :   Effect of Variation in Conventional Soil Properties on Dynamic Constrained Modulus for Several Glacial Tills.

Descriptive Note : Final miscellaneous paper rept. Jul 70-Nov 72,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Taylor,Hugh M. , Jr

Report Date : JUN 1973

Pagination or Media Count : 112

Abstract : The report presents the results of an effort to analyze and correlate data from tills to determine if the dynamic constitutive relations needed for ground shock code input are predictable from simple index and seismic tests. Data from glacial tills at seven sites in the northern United States were used successfully to correlate secant constrained moduli with percent saturation and percent air in a unit volume of soil. These correlations indicated trends distinctive enough to use either of the correlations to approximately predict, for a till, the loading portion of the UX stress-strain curve to a stress of about 500 psi. For the tills investigated in this study, dry density, UU strength, and Young's modulus taken from the static UU stress-strain curve cannot generally be used to predict the secant constrained moduli to the stress levels of interest. (Modified author abstract)

Descriptors :   (*SOIL MECHANICS, STRESSES), STRAIN(MECHANICS), SEISMIC WAVES, UNDERGROUND EXPLOSIONS, MONTANA, NORTH DAKOTA, ILLINOIS, THESES

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE