If you have any problems related to the accessibility of any content (or if you want to request that a specific publication be accessible), please contact us at email@example.com.
Shear-wave velocity and attenuation analysis of liquefiable soils in the south Truckee Meadows, Washoe County, Nevada
AuthorSirles, Phil C
Geological Sciences and Engineering
AltmetricsView Usage Statistics
Within the sediment-filled basin of the south Truckee Meadows a soil liquefaction analysis demonstrated high potential for ground settlement and other deleterious effects due to strong ground motion associated with the design and maximum credible earthquake magnitudes assigned to this area. Detailed in-situ measurements of shear-wave velocity and bulk attenuation were obtained using state-of-the-art borehole geophysical techniques at three study sites. An important result was that liquefaction susceptibility (determined by standard engineering techniques) correlates with measured values of the anelastic attenuation factor and as more in-situ data become available this method should enhance correlation with standard engineering practice. The near-surface soils (^40 ft.) have shear-wave velocities ranging between 500 and 1500 fps, primarily dependent upon stiffness and relative density of the layer. Average Qs values computed from ratios of downhole signal Fourier spectra, for the frequency band 20 to 80 Hz, are 2.3-2.4 in (liquefiable) loose to firm silty sands, and 11.4-14.6 in (non-liquefiable) sandy gravels and silty clays.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
soil liquefaction analysis
borehole geophysical techniques
anelastic attenuation factor
Mackay Science Project