Publication

An improved experimental test set-up to study the performance of granular columns

Black, J.
; 
Sivakumar, V.
; 
Madhav, M.R.
; 
McCabe, Bryan A.
Thumbnail Image
Files
Thumbnail Image
2006_[J]_Black,_Sivakumar,_Madhav_and_McCabe_(Geotech._Test._Jnl.).pdf
Adobe PDF, 314.74 KB
Repository DOI
Publication Date
2006-03
Keywords
Civil engineering, Ground improvement, Granular columns, Settlement, Stress path tests
Type
Article
Downloads
Show all metadata
Citation
Black, 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, https://doi.org/10.1520/GTJ14195. ISSN 0149-6115
Abstract
This 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.
Funder
|~|
Publisher
ASTM International
Publisher DOI
10.1520/GTJ14195
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland
cbn
Collections
Civil Engineering (Scholarly Articles)