This paper examines the consolidation and settlement behaviour of soft clays deposits treated with granular columns (single and in groups). Two Rowe Cell loading chambers were used to conduct the investigations on samples of kaolin and a local Belfast natural estuarine alluvium called ‘sleech’. Tests were carried out on unreinforced samples and then reinforced samples with single and multiple column configurations. The test duration for each test was between 3 and 4 months, depending on the test material and the granular column configuration. The settlement reduction factors based on primary and secondary consolidation were examined. The study suggests that the effectiveness of granular columns at mitigating primary and/or secondary settlement is directly related to the loading intensity, the stress history and the creep characteristics of the subsoil. It was also found that the stress concentration ratio reduced with the stress level. Secondary consolidation also has some effects on the stress concentration ratio.
|Journal||Proceedings of the Institution of Civil Engineers - Ground Improvement|
|Early online date||14 Nov 2022|
|Publication status||Published online - 14 Nov 2022|
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- soft soils
- consolidation & stone column treatment
- Soft soils