Combined Use of Standard Penetration Test and Shear Wave Velocities in Liquefaction Analysis: Çanakkale Example

Abstract

In order to investigate the liquefaction potential of the Çanakkale residential area, 151 boreholes, SPT, and 1027 classification tests were performed on disturbed samples, and 110 units of shear wave velocity (Vs) were determined by multi-channel analysis (MASW) of surface waves, and Vs values determined by underground water level information is used. Unlike previous studies, which were made using the simplified method based on SPT-N, liquefaction potential index (IL) and liquefaction risk index (IR) maps based on the standard penetration test (SPT) as well as Vs parameters were created separately for the Çanakkale settlement area. Very high IL and IR values were obtained in most of the city centers around Sarıçay. At the same time, analyses were repeated for different energy levels in order to investigate the effect of the energy coefficient, which is one of the SPT numbers of impact correction factors, on the analysis. As a result of all the analyses, it is thought that the energy level transferred in the SPT significantly affects the results, and since shear wave velocity (Vs) does not require such a correction, using SPT-N values as a reference in the analyses will reduce the negative effects that may arise from the uncertainties in field tests.