Naslov
Empirical correlation between the shear-wave velocity and the dynamic probing heavy test : case study Varaždin, Croatia

Autori
Strelec, Stjepan ; Stanko, Davor ; Gazdek, Mario

Izvornik
Acta Geotechnica Slovenica (1854-0171) 13 (2016), 1; 3-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
shear wave velocity ; MASW ; DPH ; empirical correlations ; dynamic elastic moduli ; dynamic soil properties

Sažetak
Varaždin is located in the NW part of Croatia in shallow quaternary alluvial sediments of the Drava River basin. Local site effects due to alluvial soft sediments can play a crucial role in the amplification of seismic wave ground motions. Shear wave velocity (VS) is one of the most important parameters for the determination of dynamic soil properties and ground response analysis. Seismic surface wave method - MASW is the simplest and very efficient way of measuring shear wave velocity in the field. Dynamic Probing Heavy (DPH) test is suited to the determination of soil strength and soil deformation properties. However, there is a lack of correlations between shear wave velocity and Dynamic Probing Heavy tests (VS - NDPH) in the literature. In this paper we present empirical correlations between shear wave velocity VS and soil penetration resistance NDPH with: a) raw (original) NDPH data: VS = 97.839•NDPH 0.395, (R2 = 0.723) ; b) groundwater correction NDPH data: VS = 92.998•NDPH 0.363 (R2 = 0.815). From measured DPH data, the shear wave velocity (VS), shear modulus (Go) and Young’s modulus (Eo and Er) were estimated. Two different approaches (low vs. high strain) were compared, and the results found to be in good agreement when relative difference of velocities is small and smooth. Dynamic probing tests are good for studying a discrete point of interest in a large field area based on preliminary seismic tests. The suggested correlation VS - NDPH can be used for the rough estimation of VS from NDPH (they are site-specific, not applicable worldwide). In this way valuable information about dynamic soil properties can be extracted for ground response analyses and the study of local site effects.

Izvorni jezik
Engleski

Znanstvena područja
Geofizika, Građevinarstvo, Rudarstvo, nafta i geološko inženjerstvo, Temeljne tehničke znanosti

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