Accession Number : AD0750274

Title :   Dynamic Tests, Frenchman Flat, Nevada Test Site Mercury, Nevada.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Report Date : APR 1964

Pagination or Media Count : 26

Abstract : Dynamic tests were conducted to obtain data pertinent to the elastic characteristics of soils underlying sites B-1, B-2, and B-3 at the Frenchman Flat test site, Mercury, Nevada. Seismic tests were performed to determine the depths of subsurface layers and the compression wave velocity in each medium; compression wave velocities ranged from about 890 to 2500 fps for varying depths. Vibration tests were run to obtain the shear wave velocity in the underlying materials; the shear wave velocities varied from about 300 fps near the surface to 1080 fps at depths of about 45 ft. The compression and shear wave velocities were used to compute the Poisson's ratio for the various soil media encountered at the three sites; the Poisson's ratio values for all three sites were on the order of 0.40. The tests indicated that the shear modulus G of the Frenchman Flat area soils increases with depth from values of 1500 psi to about 25,000 psi at a depth of 42 to 45 ft. At comparable depths the compression moduli were approximately three times the shear moduli.

Descriptors :   (*UNDERGROUND EXPLOSIONS, SITE SELECTION), (*SOIL MECHANICS, NEVADA), ELASTIC PROPERTIES, SEISMIC WAVES, COMPRESSIVE PROPERTIES, TEST METHODS

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE