Helisel Kazıklarda Helis Çapının Basınç Yüküne Etkisinin Laboratuvar Deneyleri ile Araştırılması

Year 2023, Volume: 38 Issue: 4, 1013 - 1022, 28.12.2023

Yakup Türedi , Buse Emirler , Murat Örnek , Abdulazim Yıldız

https://doi.org/10.21605/cukurovaumfd.1410350

Abstract

Geleneksel kazıklara karşı alternatif bir temel olarak kullanımları giderek artan helisel kazıklar, zemine tork kuvveti ile döndürülerek yerleştirilen çelik temel sistemleridir. Bu çalışmada, gevşek ve sıkı kumlu zemine yerleştirilen dört farklı çaptaki helisel kazığın basınç yükü altındaki davranışı laboratuvar model deneyleri ile araştırılmıştır. Ayrıca her iki zemin sıkılığında düz (helissiz) kazık için deneyler yapılmıştır. Nihai yük değerleri, literatürdeki analitik yaklaşımlarla karşılaştırılmıştır. Helis çapı artışının kazık kapasitesini önemli oranda artırdığı görülmüştür. Özellikle sıkı zeminde, düz kazık çapının (şaft çapı) 5,5 katı büyüklüğünde helis plakası mevcudiyetinin, nihai yük kapasitesini yaklaşık 17 kata kadar artırdığı belirlenmiştir. Sıkı zemine yerleştirilmiş helisel kazığın kapasitesinde gevşek zemine kıyasla 10 kata varan artış elde edilmiştir. Analitik yaklaşımın, deneyden elde edilen nihai yük değerleriyle uyum içinde olduğu görülmüş ve ayrık taşıma yönteminin ise her iki zemin sıkılığında başarılı olduğu sonucuna ulaşılmıştır.

Keywords

Helisel kazık, Basınç yükü, Kumlu zemin, Nihai yük

Investigation of the Effect of Helix Diameter on Compression Load in Helical Piles by Laboratory Tests

Abstract

Helical piles, which are increasingly being used as an alternative foundation to traditional piles, are steel foundation systems that are placed on the ground by rotated with torque force. In this study, the behavior of model helical piles with four different diameters placed in loose and dense sandy soils under compression load has been investigated by laboratory model tests. In addition, tests have been carried out for straight piles (without helix) at both soil densities. The ultimate load values have been compared with analytical approaches in the literature. It has been seen that the increase in helix diameter significantly increased the pile capacity. It has been determined that the presence of a helix plate with a size of 5.5 times the straight pile diameter (shaft diameter) increases the ultimate load capacity up to approximately 17 times, especially in dense soil. An increase of up to 10 times has been achieved in the capacity of helical piles placed in dense soil compared to loose soil. It has been seen that the analytical approach was compatible with the ultimate load values obtained from the test, and it has been concluded that the individual bearing method was successful in both soil densities.

Keywords

Helical pile, Compression load, Sandy soil, Ultimate load

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