Geotechnical Characterization of Alluvial Soil in Çiğli - Balatçık Region

Abstract

The alluvial deposits have high vertical deformation, low bearing capacity and shear strength because of their organic matter content and high void ratio. Therefore, for the project designed on the alluvial deposit, it is necessary to determine the geotechnical engineering properties in detail. In this study, physicochemical engineering properties and compressibility behavior of the alluvial soil taken from Çiğli - Balatçık in İzmir were examined. Alluvial soil samples were taken from each 1.5 m depth for 30 m. Wet sieve analysis, fall cone penetration, plastic limit, pH, specific gravity, organic matter content and one-dimensional consolidation tests were conducted to determine geotechnical index properties and compressibility parameters of alluvial samples. The specific gravities varied between 2.62 and 2.83 and the liquid limit values were ranged between 21.8 – 66.5%. The sieve analysis and consistency limits tests results were evaluated according to USCS, it was determined that the soil contains large amounts of low plasticity silt and low plasticity clay (ML and CL). The pH value ranged between 7.65 and 8.76. The results of one dimensional consolidation tests showed that, compressibility indices and swelling indices were range between 0.268 – 0.490 and 0.058 – 0.158, respectively.

Keywords

• Alluvial soil,compressibility,consolidation,index properties

Kaynakça

1. Yilmaz I. & Karacan E. 1997. Geotechnical properties of alluvial soils: an example from south of Sivas (Turkey). Bulletin of the International Association of Engineering Geology, 55, 159 - 165.
2. Cobanoglu I. & Bozdag S. 2007. Adana yerleşim alanindaki alüvyonlarin jeoteknik özellikleri ve coğrafi bilgi sistemi yardimiyla değerlendirilmesi. Journal of the Faculty of Engineering and Architecture of Selcuk University, 23(3), 107 - 120.
3. Yilmaz I. & Karacan E. 2002. Geotechnical Properties of Clayey Alluvial Soils in the Erbaa Basin, Turkey. International Geology Review, 44, 179 - 190.
4. Bolat B., Gurpinar O. & Yalcin M. N. 2005. İstanbul Ömerli’deki alüvyal zeminin jeoteknik özellikleri. İstanbul Üniversitesi Mühendislik Fakültesi Yerbilimleri Dergisi, 18(1), 95 - 111.
5. Tan Y. C., Gue S. S., Ng H. B. & Lee P. T. 2004. Some geotechnical properties of klang clay. Malaysian Geotechnical Conference, Kuala Lumpur, 179 - 185.
6. Standard test methods for moisture, ash, and organic matter of peat and other organic soils, 2014. American Society of Testing and Materials, West Conshohocken, PA, USA.
7. Standard test methods for specific gravity of soil solids by water pycnometer, 2014. American Society of Testing and Materials, West Conshohocken, PA, USA.
8. Kocasoy G. 1996 Atıksu arıtma çamuru ve katı atık ve kompost örneklerinin analiz yöntemleri. Bogazici University Publisher, İstanbul.

9. Standard test method for particle-size analysis of soils (Withdrawn 2016), 2007. American Society of Testing and Materials, West Conshohocken, PA, USA.
10. Standard test methods for particle-size distribution (Gradation) of soils using sieve analysis, 2009. American Society of Testing and Materials, West Conshohocken, PA, USA.
11. Standard test methods for liquid limit, plastic limit, and plasticity index of soils, 2010. American Society of Testing and Materials, West Conshohocken, PA, USA.
12. Methods of test for soils for civil engineering purposes, 2016. British Standard Institution, London, UK.
13. Standard practice for classification of soils for engineering purposes (Unified Soil Classification System), 2011. American Society of Testing and Materials, West Conshohocken, PA, USA.
14. Standard test methods for one-dimensional consolidation properties of soils using incremental loading, 2011. American Society of Testing and Materials, West Conshohocken, PA, USA.
15. Masoud A.A. 2015. Geotechnical evaluation of the alluvial soils for urban land management zonation in Gharbiya governorate, Egypt. Journal of African Earth Sciences, 101, 360 - 374.
16. Terzaghi K. & Peck R.B. 1967 Soil Mechanics in Engineering Practice. John Wiley & Sons, New York.