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dc.contributor.authorBlack, J.
dc.contributor.authorSivakumar, V.
dc.contributor.authorMadhav, M.R.
dc.contributor.authorMcCabe, Bryan A.
dc.identifier.citationBlack, J., Sivakumar, V., Madhav, M., and McCabe, B. "An Improved Experimental Test Set-up to Study the Performance of Granular Columns," Geotechnical Testing Journal, Vol. 29, No. 3, 2006, pp. 193-199, ISSN 0149-6115en_IE
dc.description.abstractThis paper describes an innovative design of a newly developed large test setup for testing the performance of footings supported on soft clay reinforced with granular columns. This advanced testing method is used to examine the settlement of footings supported on granular columns. Two important features of the equipment are (a) the axial loading system which allows samples to be consolidated under K-o condition while the load is applied onto a small foundation area of the sample, and (b) a relatively large sample size of 300-mm diameter and 400-mm high. The system is also equipped with pressure cells located beneath the footing and top cap to measure the pressure distribution with respect to foundation displacement and a lateral strain gage to monitor boundary effects. This paper reports on some of the early findings from the preliminary tests carried out using this equipment. Samples for testing were prepared by consolidating kaolin slurry in a large one-dimensional consolidation chamber. The granular columns were installed using the replacement method by compacting crushed basalt (uniformly graded with 90 % between 1.5-2-mm particle sizes) into a preformed hole. The preliminary tests have yielded promising results, validating the functionality of the equipment and support the prospect of increasing the knowledge with respect to settlement response and design of a footing supported on granular columns.en_IE
dc.description.sponsorshipThe authors would like to thank Keller Ground Engineering, UK, for funding for the project, Department of Education and Learning DEL, Northern Ireland, and The Institution of Engineers Ireland IEI, who provided a research scholarship to Mr. J. Black. VJ Tech Ltd. manufactured the triaxial test setup. Mr. T. Crothers and his team in the Mechanical Workshop at Queen’s University, Belfast, fabricated the consolidation chamber.en_IE
dc.publisherASTM Internationalen_IE
dc.relation.ispartofGeotechnical Testing Journalen
dc.subjectCivil engineeringen_IE
dc.subjectGround improvementen_IE
dc.subjectGranular columnsen_IE
dc.subjectStress path testsen_IE
dc.titleAn improved experimental test set-up to study the performance of granular columnsen_IE
dc.local.contactBryan Mccabe, Dept. Of Civil Engineering, Coll Engineering & Informatics, Room Eng-1040, Nui Galway. 2021 Email:

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