The National Geotechnical Experimentation Site at Opelika, Alabama is underlain by residual silts and sands derived from the weathering of schist and gneiss of the Piedmont Geologic Province. Site characterization by in-situ tests has included anextensive ...

Laboratory and field measurements of the small-strain shear modulus of a Piedmont residual soil were compared to gain a better understanding of mechanisms affecting stiffness. Resonant column tests were performed to study influences of void ratio, overconsolidation ...

For this research effort, in-situ penetration tests have been performed at a number of test sites in the heart of the Mid America earthquake regions. Testing areas include Charleston SC, Memphis TN, West Memphis AR, Blytheville AR, Steele MO, and Caruthersville, ...