Accession Number : AD0450626


Title :   FORECASTING TRAFFICABILITY OF SOILS; A PILOT STUDY OF SOILS SUBJECTED TO FREEZING AND THAWING,


Descriptive Note : Technical memo.,


Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS


Personal Author(s) : Knight, S J ; Smith, N H


Report Date : Jun 1964


Pagination or Media Count : 1


Abstract : Moisture content, density, and soil strength data were obtained from two test areas in Michigan which are subject to periods of freezing. Each area contained three plots with different vegetation cover: bare, herbaceous, or hardwood. Meteorological data from neighboring weather stations were recorded. Analysis of data showed that (1) the greater the vegetation density, the later the date of the first frost's appearance; (2) the greater the vegetation density and snow cover depth, the less the mean frost depth; (3) soil moisture content increased significantly as frost depth increased, and decreased when frost depth decreased; (4) soil density followed a trend opposite to that of moisture content; (5) soil strength increased radically when soil was frozen; and (6) soil strength was lowest during and immediately after the final thawing period of the season. (Author)


Descriptors :   *SOIL MECHANICS , *SOILS , TRAFFICABILITY , MOISTURE , SNOW , METEOROLOGICAL CHARTS , FREEZING , MELTING , TERRAIN , MOBILE , ARMY RESEARCH , WEATHER STATIONS , TRANSPORTATION , MICHIGAN


Distribution Statement : APPROVED FOR PUBLIC RELEASE