Determination of Dynamic Properties of Pumice Soil in Isparta Işıkkent District

Öz

In this study, the saturated undrained and drained dynamic behaviors of a pumice-containing soil sample collected from a construction site located in the Işıkkent District of Isparta were investigated. Stress-controlled tests were conducted using the VJ Tech DSS-C dynamic simple shear device. The samples were subjected to cyclic loading at a frequency of 1 Hz under three different cyclic stress ratios: 0.2, 0.25, and 0.3. In the undrained tests, the liquefaction tendency of the samples and the development of excess pore water pressure were evaluated, while in the drained tests, volumetric deformation and changes in vertical effective stress were examined. The results indicate that an increase in cyclic stress ratio leads to greater shear deformations and a higher liquefaction potential under undrained conditions. In the drained tests, the soils were observed to undergo volumetric deformation. This study contributes to the engineering evaluation of the dynamic properties of pumice-containing soils.

Anahtar Kelimeler

• Pumice soil
• Dynamic simple shear test
• Liquefaction potential
• Volumetric strain

Isparta Işıkkent Mahallesi Pomzalı Zeminin Dinamik Özelliklerinin Belirlenmesi

Öz

Özet: Bu çalışmada, Isparta’nın Işıkkent Mahallesi’nde bulunan inşaat sahasından alınan pomza içeren zemin numunesinin doygun haldeki drenajsız ve drenajlı dinamik davranışları incelenmiştir. Çalışmada, VJ Tech DSS-C dinamik basit kesme cihazı kullanılarak gerilme kontrollü deneyler gerçekleştirilmiştir. Numuneler, 0.2, 0.25 ve 0.3 olmak üzere üç farklı dinamik gerilme oranında, 1 Hz frekansta tekrarlı yüklemelere tabi tutulmuştur. Drenajsız deneylerde numunelerin sıvılaşma eğilimleri ve aşırı boşluk suyu basıncı gelişimi değerlendirilirken, drenajlı deneylerde hacimsel deformasyon ve düşey efektif gerilme değişimleri incelenmiştir. Sonuçlar, dinamik gerilme oranının artışıyla kayma deformasyonlarının büyüdüğünü ve drenajsız koşullarda numunelerin sıvılaşma potansiyelinin arttığını göstermektedir. Drenajlı deneylerde ise zeminlerin hacimsel deformasyona uğradığı belirlenmiştir. Çalışma, pomza içeren zeminlerin dinamik özelliklerinin mühendislik açısından değerlendirilmesine katkı sağlamaktadır.

Anahtar Kelimeler

• Pomza zemini
• Dinamik basit kesme deneyi
• Sıvılaşma potansiyeli
• Hacimsel deformasyon

Kaynakça

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