Experimental study on sand and gravel columns in clay

Andreou, P; Frikha, W; Frank, R; Canou, J; Papadopoulos, V; Dupla, J-C

dc.contributor.author	Andreou, P	en
dc.contributor.author	Frikha, W	en
dc.contributor.author	Frank, R	en
dc.contributor.author	Canou, J	en
dc.contributor.author	Papadopoulos, V	en
dc.contributor.author	Dupla, J-C	en
dc.date.accessioned	2014-03-01T01:57:07Z
dc.date.available	2014-03-01T01:57:07Z
dc.date.issued	2008	en
dc.identifier.issn	17550750	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28356
dc.subject	Geotechnial engineering	en
dc.subject.other	Clay	en
dc.subject.other	Clay minerals	en
dc.subject.other	Columns (structural)	en
dc.subject.other	Compression testing	en
dc.subject.other	Consolidation	en
dc.subject.other	Drainage	en
dc.subject.other	Experiments	en
dc.subject.other	Gravel	en
dc.subject.other	Kaolin	en
dc.subject.other	Reinforcement	en
dc.subject.other	Rock pressure	en
dc.subject.other	Soils	en
dc.subject.other	Beneficial effects	en
dc.subject.other	Composite soils	en
dc.subject.other	Confining pressures	en
dc.subject.other	Controlling parameters	en
dc.subject.other	Drainage conditions	en
dc.subject.other	Experimental studies	en
dc.subject.other	Foundation settlements	en
dc.subject.other	Foundation soils	en
dc.subject.other	Geotechnial engineering	en
dc.subject.other	Grain sizes	en
dc.subject.other	Ground improvements	en
dc.subject.other	Kaolin clays	en
dc.subject.other	Laboratory experiments	en
dc.subject.other	Rate of deformations	en
dc.subject.other	Reinforced soils	en
dc.subject.other	Reinforcement materials	en
dc.subject.other	Sand columns	en
dc.subject.other	Seismic activities	en
dc.subject.other	Soft soils	en
dc.subject.other	Stone columns	en
dc.subject.other	Strength characteristics	en
dc.subject.other	Triaxial compression tests	en
dc.subject.other	Soil liquefaction	en
dc.subject.other	clay	en
dc.subject.other	consolidation	en
dc.subject.other	design	en
dc.subject.other	drainage	en
dc.subject.other	experimental study	en
dc.subject.other	foundation	en
dc.subject.other	grain size	en
dc.subject.other	ground improvement	en
dc.subject.other	kaolin	en
dc.subject.other	liquefaction	en
dc.subject.other	reinforcement	en
dc.subject.other	sand and gravel	en
dc.subject.other	seismic response	en
dc.subject.other	soft soil	en
dc.title	Experimental study on sand and gravel columns in clay	en
heal.type	journalArticle	en
heal.identifier.primary	10.1680/grim.2008.161.4.189	en
heal.identifier.secondary	http://dx.doi.org/10.1680/grim.2008.161.4.189	en
heal.publicationDate	2008	en
heal.abstract	Theoretical and experimental studies have shown that stone columns can be used for accelerating the consolidation rate of soft soils by providing a drainage path, reducing foundation settlements, improving the bearing capacity of the soil, and limiting the risk of liquefaction due to seismic activity. This paper studies the influence of the main controlling parameters in the design of stone columns through a series of laboratory experiments. The effects of (a) the drainage conditions, (b) the grain size of the stone column material, (c) the confining pressure of the soil, and (d) the rate of deformation are investigated. Triaxial compression tests are performed on composite soil specimens of soft kaolin clay, reconstituted from a slurry with a central compacted reinforcement column. Two cases of reinforcement material are studied: sand and gravel. The behaviour of the reinforced soil compared with that of the unreinforced soil under the same loading and drainage conditions is analysed. The experimental results show the beneficial effect of this ground improvement technique on the strength characteristics of the foundation soil, even with a relatively low replacement factor compared with that used in practice. As the confining pressure increases, the improvement in the specimen with the sand column is more pronounced.	en
heal.journalName	Proceedings of the Institution of Civil Engineers: Ground Improvement	en
dc.identifier.doi	10.1680/grim.2008.161.4.189	en
dc.identifier.volume	161	en
dc.identifier.issue	4	en
dc.identifier.spage	189	en
dc.identifier.epage	198	en