NEHRP Clearinghouse
- Title
- Correlations of Seismic Velocity with Depth in Southern California.
- File
- PB80164080.pdf
- Author(s)
- Campbell, K. W.; Chieruzzi, R.; Duke, C. M.; Lew, M.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., October 1979, 52 p.
- Identifying Number(s)
- UCLA-ENG-7965
- Abstract
- This report presents updated correlations relating seismic velocity and Poisson's ratio with depth and various geotechnical parameters for different soil and rock classifications found in Southern California. Such correlations are very useful in earthquake engineering applications. The current study updates previous work by incorporating prior data with 48 new velocity measurements. Data were obtained from borings drilled as part of geotechnical investigations. In addition to establishing updated velocity correlations, these new data improved and extended a previously developed geotechnical classification system. The report presents new shear-wave and compressed wave velocity together with supporting geotechnical data. Statistics are compared for each classification for surface and near surface velocities of both shear and compressional waves and for Poisson's ratios. Correlations to depth are presented for a few of the classifications for which sufficient data are available. The geotechnical parameters significant to seismic velocity and Poisson's ratio include geologic age, gravel content, water table depth, dry density, and depth of overburden.
- Keywords
- Poisson ratio; Seismic waves; California; Soil classification; Rock properties; Earthquake engineering; Secondary waves; Seismic surveys; Earthquakes