Comparison of Shear-wave Profiles for a Compacted Fill in a Geotechnical Test Pit

Thursday, 18 December 2014
Matthew Brian Sylvain1, Miguel A Pando1, Matthew Whelan1, Duane Bents2, Choon Park3 and Vincent Ogunro1, (1)University of North Carolina at Charlotte, Charlotte, NC, United States, (2)S&ME, Charlotte, United States, (3)Park Seismic LLC, Shelton, CT, United States
This paper investigates the use of common methods for geological seismic site characterization including: i) multichannel analysis of surface waves (MASW),ii) crosshole seismic surveys, and iii) seismic cone penetrometer tests. The in-situ tests were performed in a geotechnical test pit located at the University of North Carolina at Charlotte High Bay Laboratory. The test pit has dimensions of 12 feet wide by 12 feet long by 10 feet deep. The pit was filled with a silty sand (SW-SM) soil, which was compacted in lifts using a vibratory plate compactor. The shear wave velocity values from the 3 techniques are compared in terms of magnitude versus depth as well as spatially. The comparison was carried out before and after inducing soil disturbance at controlled locations to evaluate which methods were better suited to captured the induced soil disturbance.