Improvement of soft soils using bio-cemented sand columns

Aamir Mahawish, Abdelmalek Bouazza, Will P. Gates

Research output: Contribution to journalConference articleOther

Abstract

This paper discusses the results of small-scale model tests that were undertaken to investigate the behaviour of un-cemented and bio-cemented coarse sand columns installed within a soft clay bed. The tests also focused on studying the effect of biocementation to reduce excessive radial expansion and settlement that may occur during installation or loading of sand columns. A multi-phase biochemical treatment strategy was used to obtain a partial biocementation, in particular at the upper section of the sand column where bulging usually occurs. The results show that the partially bio-cemented sand column substantially reduced vertical strains which were in the order of 71% and 97% compared with un-cemented sand column and kaolin clay, respectively. The bulging of the bio-cemented sand column was associated with the bottom section of the column where there were no or less bio-cemented materials.

Original languageEnglish
Pages (from-to)822-825
Number of pages4
JournalSpringer Series in Geomechanics and Geoengineering
Issue number216849
DOIs
Publication statusPublished - 1 Jan 2018
EventChina-Europe Conference on Geotechnical Engineering 2016 - Vienna, Austria
Duration: 13 Aug 201616 Aug 2016
https://www.springer.com/us/book/9783319971148

Keywords

  • Biocementation
  • Sand column
  • Soft soil

Cite this

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Improvement of soft soils using bio-cemented sand columns. / Mahawish, Aamir; Bouazza, Abdelmalek; Gates, Will P.

In: Springer Series in Geomechanics and Geoengineering, No. 216849, 01.01.2018, p. 822-825.

Research output: Contribution to journalConference articleOther

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