Analysis And Improvement of Poor Bearing Capacity Soils in Düzce Province by Jet grouting Method
Abstract
Turkey is situated in an earthquake-prone zone, and due to its geographic location, Düzce is among the most hazardous regions in the country and the world. The seismic risk in Düzce province is significantly influenced by the North Anatolian Fault (NAF), which is characterized by an active tectonic structure. This area has experienced earthquakes of varying magnitudes both before and after the instrumental recording period. Especially, two significant earthquakes occurred in 1999: on August 17, an earthquake with a moment magnitude of Mw = 7.4 struck the Adapazarı-İzmit region. Shortly after, on November 12, 1999, another earthquake with a moment magnitude of Mw=7.1 hit Düzce area at approximately 18:57, lasting for about 30 seconds. During the August 17 earthquake, the eastern section of the Düzce fault, measuring 43 km, was activated. The November 12 earthquake is considered to have been triggered by the previously unbroken eastern section of the Düzce fault as a result of the initial faulting. In the city center, the soil composition mainly consists of fine gravel and sandy gravel in certain areas. Previous earthquakes have resulted in structural damages primarily due to bearing capacity issues, and liquefaction phenomena have also been observed in some locations. In this study, the soil beneath a planned three-story building in Düzce, an area identified having a liquefaction risk, was improved using the jet grout method.
Keywords
Bearing capacity, Jet groud, Ground improvement, Geotechnical
Thanks
We thank the Düzce Provincial Directorate of Environment and Urbanization for their contributions to the work.
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