
Large Scale Assessment of the Liquefaction Potential Using the Cone Penetration Testing (CPT): Example Of Sisak – Moslavina County in Croatia
Authors
Meho Sasa Kovacevic, Davor Garasic, Mario Bacic, Marijan Car
DOI
Abstract
On December 29th, 2020, an earthquake with a magnitude of 6.2 on the Richter scale struck the area of central Croatia. During and after the earthquake, several geotechnical phenomena appeared that directly impacted buildings and infrastructure. The most widespread phenomenon that caused significant damages is liquefaction, which occurred on almost 1600 ha of the Sisak – Moslavina County’s territory. As a phenomenon occurring during the strong seismic events in saturated non-coherent materials, it is characterized by turning the soil into a thick liquid, losing its strength and stiffness. As a part of large-scale investigations of the area in the post-seismic period, a Cone Penetration Testing (CPT) campaign was implemented to assess the probability of liquefaction occurrence. Considering the very large and statistically relevant number of collected data, the development of a map of a specific region followed, by interpolating the obtained results. As such, this map can be directly compared to the previous liquefaction assessment efforts which relied only on the limited indicators, such as overall geology and distance from the adjacent rivers.