Kohezyonsuz Zeminlerin Tane Dağılım ve Şekil Özelliklerinin Aktif Göçme Yüzeyi Geometrisine Etkileri

Year 2019, Volume: 30 Issue: 5, 9399 - 9420, 01.09.2019

Çağdaş Arda , Özer Çinicioğlu

https://doi.org/10.18400/tekderg.397658

Cited By: 3

Abstract

İstinat duvarlarının aktif şartlara ulaşması
sonucunda oluşan göçme yüzeylerinin geometrileri, granüler dolguların genleşim
davranışından etkilenmektedir. Literatürdeki gerilme-genleşim
denklemleri bağıl yoğunluğun ve ​​gerilme durumunun zeminin genleşim
davranışına etkilerini ortaya koymaktadır. Fakat bu değişkenlerin göçme anında
oluşacak kayma bandı geometrisine etkilerini model deneyler ile araştıran
mevcut çalışmalar düşük gerilmeler altında ve zeminlerin mikro-mekanik
özellikleri dikkate alınmadan gerçekleştirilmiştir. Bu nedenle, bu çalışmada
kullanılmak üzere aktif yönde yanal olarak hareket edebilen ve düşey yönde
sürşarj uygulayabilen küçük ölçekli bir 1G fiziksel istinat duvarı modeli oluşturulmuştur.
Fiziksel model deney düzeneği kullanılarak farklı tane şekli ve boyutlarına
sahip üç farklı granüler dolgu malzemesi ile çeşitli sıkılık-gerilme
tertiplerinde deneyler yapılmıştır. Yapılan model deneylerinin görüntüleri parçacık
görüntülü hız ölçümü (PGHÖ) yöntemi ile çözümlenmiş ve göçme yüzeyi geometrileri
elde edilmiştir. Böylece tane boyutu, şekli ve sürşarj yükünün göçme yüzeyi
geometrilerine etkileri araştırılmıştır.

Keywords

Genleşim açısı, PGHÖ, fiziksel model, göçme yüzeyi

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