Soil Properties Influencing Strength of Canfield and Geeburg Soils1
- D. E. McCormack and
- L. P. Wilding2
This study was conducted to determine the relationships between in situ shear strength and soil properties in two contrasting soil series. Shear strength was measured using a vane forced into the soil by a truck-mounted hydraulic sampler. Selected horizons at five sites of each soil series were tested. Vane shear tests were performed both in the fall and in the spring; 144 tests were performed.
Soil moisture content, bulk density, and clay content were found to be of most influence on vane shear strength. Multiple regression analysis showed that coarse clay content is positively correlated with shear strength and fine clay content is negatively correlated. These four variables explain 83% of the variation in vane shear strength. Remolded shear strength in the Bt horizons of both soils is < 0.15 kg/cm2. The soil properties that explain most of the variation in shear strength are used in the classification of soil series, or are directly associated with these properties. Determination of soil strength using the vane shear test is quick and inexpensive. The high correlation between the test results and soil properties suggests that further study of the potential use of the vane shear test in the soil survey is warranted.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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