STATIC AND DYNAMIC COMPRESSIBILITY OF SUFFIELD EXPERIMENTAL STATION SOILS
Abstract
Static and dynamic one-dimensional compression tests were performed on each of ten 5-inch undisturbed shelby tube soil samples taken from the site of Operation Snowball at the Suffield Experimental Station. The maximum stresses attained were generally in the 390 to 1,300 psi range. The results of the tests are presented in the form of plots of axial stress versus axial strain, constrained modulus versus axial stress, and radial stress versus axial stress. The dynamic modulus observed for the upper 13 feet of the soil profile has a minimum value of approximately 3,000 psi, and is approximately twice the static value. Between the depths of 13 feet and 23 feet, moduli values ranging from 18,000 to 24,000 psi are applicable at the 100 psi stress level. Below a depth of 23 feet, the estimated water level, the constrained modulus is considered equal to that of water--300,000 psi. An airblast-induced ground motion prediction was made for a range of 250 feet from a 500-ton TNT explosion. A peak transient surface displacement of 4.6 inches was computed for a time of 39 milliseconds after arrival of the shock front at the ground surface. Because of differences between the laboratory and field loading histories, and the strain rate sensitivity of the soil, the computed displacement is probably from 50 to 100 percent of the actual displacement.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0615457
Entities
People
- M. T. Davisson
- T. R. Maynard