HELİSEL KAZIKLARDA NİHAİ BASINÇ TAŞIMA GÜCÜNÜN ÇARPAN ELASTOPLASTİK ANALİZ İLE BELİRLENMESİ

Yıl 2025, Cilt: 1 Sayı: 1, 47 - 58, 26.12.2025

Betül Keseroğlu , Murat Örnek , Yakup Türedi , Muhammet Dingil

https://izlik.org/JA26RS54PX

Öz

Eksenel basınç yüküne maruz helisel kazıklarda nihai taşıma gücü;
silindirik kayma ve ayrık taşıma gücü yöntemleri denklemlerinden,
kurulum torku değeri üzerinden ve helisel kazıklara ait yük-deplasman
eğrilerinden belirlenebilmektedir. Bu çalışmada, eksenel basınç yükü etkisi
altında kohezyonsuz gevşek zemine gömülü helisel kazıklar; sayısal olarak
modellenerek sonlu elemanlar yöntemi çarpan elastoplastik analiz (MEPA)
ile çözümlenmiştir. Farklı helis çapına (D), aralığına (s) ve sayısına (N)
sahip helisel kazıklar, iki boyutlu eksenel simetri yaklaşımıyla OPTUMG2
geoteknik tasarım programında modellenmiştir. Her bir deney
senaryosunda, yük artımsal olarak eksenel basınç uygulanan helisel
kazıklar için yük-deplasman eğrileri elde edilmiş ve %5D sınır deplasman
ölçütüne göre helisel kazıkların nihai basınç taşıma kapasiteleri
hesaplanmıştır. Sayısal çözümlemelerde, helis geometrisindeki
değişimlerin taşıma gücüne etkisi; deneysel sonuçlarla benzer bir eğilim
sergilemiş; ancak deneylerde gözlemlenen daha yüksek kapasite
artışlarının, gevşek zemindeki kurulum kaynaklı yerel sıkılaşma etkisinden
ileri geldiği değerlendirilmiştir. Sonuç olarak, gevşek kum zemin için
yapılan analizlerde sayısal modelin, deneysel verilerle (R2=0.81) ve analitik
sonuçlarla (R2=0.89) yüksek düzeyde bir korelasyon gösterdiği
belirlenmiştir.

Anahtar Kelimeler

helisel kazık , kohezyonsuz zemin , gevşek kum , eksenel yükleme , sayısal analiz , çarpan elastoplastik

Kaynakça

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