A Study of settlement of stone columns by finite element modeling through case histories

Yardım, Cemre Harzem
Stone column technique is mostly used to reinforce soft cohesive soils. Settlements are decreased under foundations and bearing capacity is increased. This study initially focuses on a comprehensive review of literature about stone column reinforced soils. Afterwards, numerical modeling of stone column reinforced soft clays is done. Three different cases are chosen on different foundation soils mainly soft clays. Parametric studies are done to determine influence of parameters on settlement reduction ratio under three different foundation conditions. Analyses are converted to two dimensional conditions and this conversion is also compared within the scope of this study. Settlement reduction ratio response to variation in parameters revealed similar results under three different foundation conditions


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Aggaregate piers are widely used to enhance the performance of cohesionless and cohesive foundations soils. It is an effective and economical solution to several geotechnical engineering problems including insufficient bearing capacity, excessive settlements, slope instability and liquefaction. The performance of stone columns is governed by a number of factors including installation procedure, area replacement ratio, column length, shear strength characteristics of the column and native soil characteristic...
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Determination of stress concentration factor in stone columns by numerical modelling
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The behaviour of stone columns in soft cohesive soil is investigated by finite element analyses. Conventional design methods and settlement calculations of improved ground require the knowledge of stress concentration factor which is in stone column design practice either determined by field tests or estimated from recommendations given in literature. The former is not economical for small to medium scale projects. This study focuses on the determination of stress concentration factor in stone columns by nu...
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Reinforcing elements such as geotextiles or geogrids are widely used in retaining walls, slopes and embankments since they provide an economical and practical solution. A reinforced wall transitions into a slope as the slope angle with the horizontal decreases. Therefore, the design methodology transitions from lateral earth pressure theory to slope stability analyses. For slope stability problems both limit equilibrium and finite element methods are being used widely. In limit equilibrium solutions, the re...
Citation Formats
C. H. Yardım, “A Study of settlement of stone columns by finite element modeling through case histories,” M.S. - Master of Science, Middle East Technical University, 2013.