Accession Number:

AD0411210

Title:

THE RESPONSE OF SOILS TO DYNAMIC LOADINGS,

Descriptive Note:

Research rept.

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s):

Report Date:

1963-03-01

Pagination or Media Count:

1.0

Abstract:

Dilatational waves of ultrasonic frequency are produced in a laboratory specimen of soil by energizing a barium titanate crystal, and the resultant waves picked up by a second crystal. The transit time of the wave front is observed by displaying input and output signals on an oscil loscope. Wave velocity as a function of confining pressure was measured for Ottawa sand and for glass beads. The velocity varied somewhat with specimen thickness, apparently because of dis persion of very high frequency portions of the wave front. The measured velocity varied approxi mately as the 14 to 15th power of the confining pressure, and agreed very closely with the values calculated from Brandts equations. The measured velocities were reasonably consistent with the rod and shear wave velocities reported by Richart. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE