Ghafarian, Danial, Imam, S M Reza. (1400). Numerical Study of the Settlement of Rafts on Soft Soils Improved by Small Groups of Stone Columns. نشریه مهندسی عمران امیرکبیر, 5(4), 577-596. doi: 10.22060/ajce.2021.18701.5694
Danial Ghafarian; S M Reza Imam. "Numerical Study of the Settlement of Rafts on Soft Soils Improved by Small Groups of Stone Columns". نشریه مهندسی عمران امیرکبیر, 5, 4, 1400, 577-596. doi: 10.22060/ajce.2021.18701.5694
Ghafarian, Danial, Imam, S M Reza. (1400). 'Numerical Study of the Settlement of Rafts on Soft Soils Improved by Small Groups of Stone Columns', نشریه مهندسی عمران امیرکبیر, 5(4), pp. 577-596. doi: 10.22060/ajce.2021.18701.5694
Ghafarian, Danial, Imam, S M Reza. Numerical Study of the Settlement of Rafts on Soft Soils Improved by Small Groups of Stone Columns. نشریه مهندسی عمران امیرکبیر, 1400; 5(4): 577-596. doi: 10.22060/ajce.2021.18701.5694

Numerical Study of the Settlement of Rafts on Soft Soils Improved by Small Groups of Stone Columns

AUT Journal of Civil Engineering
مقاله 3، دوره 5، شماره 4، زمستان 2021، صفحه 577-596    اصل مقاله (1.95 M)
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22060/ajce.2021.18701.5694
نویسندگان
Danial Ghafarian1؛ S M Reza Imam* 2
1Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, Iran.
2Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran. Iran
چکیده
Stone column installation is used as an economical, simple, and efficient technique for soft ground improvement to reduce settlements, increase bearing capacity and accelerate the drainage of the foundation soil. While design approaches and analytical methods usually consider the condition of a very large loaded area by using unit-cell models, many practical stone column improvement projects deal with finite or semi-infinite loading areas (e.g. storage tank foundations and road embankments, respectively). In recent years, researchers drew attention to studying the behavior of small groups of stone columns. There are some recommendations in the literature for the prediction of settlements of small groups of stone columns (Sgroup) based on results of unit-cell models (Suc). However, these methods are developed for a specific soft soil or loading condition. This paper presents a relationship for the estimation of the ratio of settlement of a finite-sized stone column supported foundation (SCSF) to the settlement of an infinite group as obtained from a unit-cell model (Sgroup/Suc). The sub-soil and loading conditions are easily taken into account in the proposed relationship. For this purpose, the settlement of a large number of SCSFs having various geometrical and mechanical conditions is investigated using numerical FEM modeling.
کلیدواژه‌ها
Stone column group؛ Settlement ratio؛ Unit-cell idealization؛ Settlement improvement factor؛ Finite element analysis
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