Performance Analysis of Reinforced Stone Columns Using Finite Element Method

 

Aminaton Marto

Professor of Faculty of Civil Engineering, University Technology Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia
e-mail: aminaton@utm.my

Razieh Moradi

Ph.D Student of Faculty of Civil Engineering,
University Technology Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia
e-mail: mrazieh2@live.utm.my

Farshad Helmi

Ph.D Student of Faculty of Built Environment,
University Technology Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia
e-mail: Hfarshad2@live.utm.my

Nima Latifi

Ph.D Student of Faculty of Civil Engineering,
University Technology Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia
e-mail: En_latifi@yahoo.com

Mohsen Oghabi

Ph.D Student of Faculty of Civil Engineering,
University Technology Malaysia (UTM), 81310 Skudai, Johor Bahru, Malaysia
e-mail: Mohsenoghabi@yahoo.com

 

 ABSTRACT

Nowadays diminish in the suitable site for constructions become a big challenge for engineers and encouraged them to consider improving of the in situ soils. Out of all methods for ground improvement, stone column became more popular these days according to its simple construction and economic consideration. Installation of stone column especially in loose and fine graded soil causes increase in load bearing capacity and settlement reduction. On the other hand installation of stone column in very soft soils faces to some limitations and the soft soil particles may not clog into the stones successfully so further development in stone column installation is reinforcing the columns with geosynthetics or geogrids. This paper introduces the assumptions, procedures and results of the numerical analysis for simulating the behaviour of un-encased versus geogrid encased stone column in soft clay. Settlement and bearing capacity of stone columns and geogrid encased stone columns in terms of various diameters were selected as criteria for judgment and comparison of the behaviour of the ordinary and geogrid encased stone columns. The proposed evaluation is conducted with the aid of finite element software, PLAXIS V.8, and a reasonable agreement obtained between the experimental investigation and the finite element method.

Keywords: stone column, geogrid, geosynthetics, finite element, ground improvement.

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