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


Determination of stress concentration factor in stone columns by numerical modelling
Yıldız, Melis; Erol, Ahmet Orhan; Department of Civil Engineering (2013)
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...
Assessing the effects of confining stress state on the mobilization of axial compressive resistance for a single aggregate pier/
Doğan, Alparslan; Çetin, Kemal Önder; Department of Civil Engineering (2014)
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...
BATIGüN, AYSEGüL; Tosun, İsmail (Informa UK Limited, 1987-11)
A rigorous washing theory is developed using the area averaging technique for unsaturated filter cakes. Limiting cases of the resulting equations are investigated. The assumptions used in the modelling are verified. The mass transfer parameters, which are evaluated by the application of the moment analysis, are shown to be directly proportional with the volumetric flow rate of the wash liquor. Experimental results also indicate that, for a given wash liquor volumetric flow rate, the increase in the cake ...
A Study on Tensile Strength of Compacted Fine-Grained Soils
Dagar, Volkan; Çokça, Erdal (Springer Science and Business Media LLC, 2020-08-01)
The tensile strength of clay is a major mechanical parameter and the main controlling parameter of tensile crack development which is generally encountered in geostructures. In this experimental study, 8-shaped direct tensile test and split tensile test were used to measure the tensile strength of compacted clay soil. Unconfined compression tests on the same clay samples were also carried out. Tensile strength and unconfined compression test results were compared. Laboratory tests were performed on Ankara c...
An Evaluation of the Binders and Aggregates Used in Artificial Stone Architectural Claddings and Elements in Late 19th-Early 20th Centuries
Ersen, Ahmet; Gürdal, Erol ; Güleç, Ahmet ; Baturayoğlu Yöney, Nilüfer ; Polat Pekmezci, Işıl ; Verdön, İrem (Middle East Technical University, Faculty of Architecture, 2010)
The material defined as ‘artificial stone’, frequently used on the façades of the late 19th and early 20th century buildings, is a mixture of binder, aggregate and other additives and may either be applied directly as a coating on wall surfaces or precast in moulds and then attached to façades as decorative architectural elements (1). One of the effects of the Industrial Revolution in the 19th century was a tendency to standardize architectural production, which in turn moved away from time-consuming ...
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.