Examination of Existing Shear Wave Velocity and Shear Modulus Correlations in Soils.

摘要

Dynamic soil stiffness, as indicated by either shear modulus or shear wave velocity, is a prerequisite parameter for dynamic analysis of earthen structures, foundations for superstructures, and free-field seismic response. It is, however, an expensive parameter to determine in situ and in the laboratory. Numerous researchers and practitioners have examined the viability of correlations between dynamic soil stiffness and basic, more common engineering parameters. These correlations appear to have evolved because of the expense of active measurement to augment (or in some cases, replace) designated testing. Later studies seem to capitalize on a rapidly expanding data base of measured values that was nonexistent even a decade ago. This study presents, discusses, and compares a majority of correlations involving shear modulus and shear wave velocity to date in the United States and Japan. The objective is to provide a comprehensive understanding of the nature of the correlations so that the reader may appreciate their evolution and use the technology appropriately in everyday practice. Keywords: Crosshole seismic data; Seismic data bases. (EDC)