Warsaw Glacial Quartz Sand with Different Grain-Size Characteristics and Its Shear Wave Velocity from Various Interpretation Methods of BET

摘要: After obtaining the value of shear wave velocity (VS) from bender elements test (BET), modulus soils at small strains (Gmax) can be estimated. Shear is an important parameter in design geo-structures subjected to static and dynamic loading. While are increasingly used both academic commercial laboratory systems, there remains a lack agreement when interpreting travel time these tests. Based on data 12 Warsaw glacial quartz samples sand, primarily two different approaches were examined for determining VS. They related observation source received BE signal, namely, first arrival peak-to-peak method. These methods performed through visual analysis BET by authors, so that subjective estimates produced. Subsequently, automated GDS Bender Element Analysis Tool (BEAT) applied. Here, three techniques time-domain (TD) selected, peak-to-peak, zero-crossing, cross-correlation function. Additionally, cross-power spectrum calculation signals was completed, viewed as frequency-domain (FD) Final comparisons between observational analyses interpretations results showed good agreement. There compatibility especially methods: cross-correlation, which authors considered best their soils. Moreover, tests compact, medium, well-grained sand with curvature coefficient mean grain size. Investigation influence grain-size characteristics demonstrated VS larger higher values uniformity coefficient, while it rather independent