Gevşek ve sıkı siltli kum zeminlerin durum parametresi üzerindeki ince dane etkisi

Yıl 2024, Cilt: 8 Sayı: 2, 16 - 28, 28.12.2024

Devrim Erdoğan , Muhammed Mahmudi

Öz

Zeminlerin tipik davranışları çerçevesinde akma davranışı, birçok geoteknik hasara sebep olmaktadır. Bu durum, sıvılaşma ve yüksek deformasyonlara neden olması açısından daha da önemlidir. Wachusett ve San Fernando barajlarında görülen akma göçmeleri, bu davranışı büyük ölçüde temsil eden gerçek örneklerdir. Bu araştırmada, gevşek (Dr= %25), ve sıkı (Dr= %75) sıkılığındaki suya doygun siltli kum zeminlerin kayma dayanımı davranışı üzerindeki ince dane etkisi durum parametresi ile bağdaştırılarak incelenmiştir. Bu amaca yönelik olarak, temiz kum ile %10, %20, %30, %40 ve %50 oranlarında silt karıştırılmış kum örnekleri üzerinde konsolidasyonlu drenajsız (CU) statik üç eksenli basınç deneyleri gerçekleştirilmiştir. Deneyler, 50, 100 ve 200 kPa başlangıç efektif konsolidasyon basınçlarında gerçekleştirilmiştir. Deney sonuçları, drenajsız kayma dayanımı davranışının ve aşırı boşluk suyu basıncı değişiminin ince dane içeriğinden önemli ölçüde etkilendiğini durum parametreisi ile birlikte ortaya koymuştur. Gevşek örnekler için elde edilen durum parametre değerleri pozitif bölgede yer almakta olup sıkışma türünde bir davranış ve sıkı örneklerde durum parametre değerleri negatif bölgede yer almakta olup genişleme türünde bir davranış sergilemektedir. Yapılan değerlendirmeler, ince dane içeriğinin, zemin dokusunun değiştirdiğini ve eşik ince dane değerinin iri dane matrisi veya ince dane matrisi davranışı anlamında önemli olduğunu göstermektedir.

Anahtar Kelimeler

Durum parametresi, Kayma dayanımı, Siltli kum

Etik Beyan

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Destekleyen Kurum

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Proje Numarası

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Teşekkür

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Kaynakça

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